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2018年第5期共收录51

1. Kinetics Modeling and Experiment of Lateral Throwing of Corn Straws

Accession number: 20183705807461

Title of translation:

Authors: Chen, Haitao (1); Li, Ang (1); Shi, Naiyu (1); Xu, Yuan (1)

Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 76-83

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The 2BMFJ type no-till precision planter which applied the way of expelling straw sideways was able to integrate seedbed preparing, precision seeding, fertilization, compacting, pesticide spraying, and straws mulching equably at one operation. The planter has become an important technical mean to guarantee the combination of intensive cultivation and conversation tillage of corn, soybean and peanut. It’s necessary to design a kind of straws recovering device matching the 2BMFJ type no-till precision planter, because of the reason that crop yield and microorganism were affected by crop-residue incorporation significantly. In order to understand the law of lateral throwing of straws which was impacted by the cleaning device of the 2BMFJ type no-till precision planter, comprehensively considered with the influence of air resistance, soil interference and other uncontrollable factors on the spatial trajectory of the straws, the kinetics analysis of lateral throwing process of straws was taken, a model of straws lateral throwing kinetics with modified coefficients and a parametric equation of spatial trajectory of straw were established. A modified coefficient regression model which applied with the method of three-factor and five-level quadratic regression orthogonal center combination and a high-speed photography technology was established. The kinetics model of lateral throwing of corn straws was used to match the straws recycling device and cleaning straws device. The results of field test showed that straws recovery rate was up to 91.21%, and the uncleanness rate was 6.08%. The research result can provide reference for the design of 2BMFJ type no-till precision planter matching a kind of straws recovering device. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Seed

Controlled terms: Agricultural wastes  -  Air cleaners  -  Cleaning  -  Crops  -  High speed photography  -  Kinetics  -  Recovery  -  Regression analysis

Uncontrolled terms: Central composite  -  Cleaning devices  -  Corn straws  -  Kinetics modeling  -  No-till planters

Classification code: 451.2 Air Pollution Control

Air Pollution Control

  -  742.1 Photography

Photography

  -  802.3 Chemical Operations

Chemical Operations

  -  821.4 Agricultural Products

Agricultural Products

  -  821.5 Agricultural Wastes

Agricultural Wastes

  -  922.2 Mathematical Statistics

Mathematical Statistics

  -  931 Classical Physics; Quantum Theory; Relativity

Classical Physics; Quantum Theory; Relativity

Numerical data indexing: Percentage 6.08e+00%, Percentage 9.12e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.009

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

2. Protein Degradation of Different Cuts in Xinjiang Brown Cattle Beef during Postmortem Aging

Accession number: 20183705807498

Title of translation:

Authors: Feng, Yonghong (1); Wang, Yongfeng (1); Li, Haipeng (1); Zhang, Songshan (1); Wan, Hongbing (1); Sun, Baozhong (1)

Author affiliation: (1) Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing; 100193, China

Corresponding author: Sun, Baozhong(baozhongsun@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 382-389

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The effect of muscle fiber type on protein degradation of Xinjiang brown cattle beef during postmortem aging was observed. Different cuts of longissimusdorsi (LD), psoas major (PM), biceps femoris (BF) with different muscle fiber type composition were chosen to measure protein solubility, myofibril fragmentation index, muscle fiber ultrastructure and SDS-PAGE respectively at 1. h, 6.h, 12.h, 1. d, 3.d, 7.d and 14.d after slaughter. The samples were kept at 4 during postmortem aging. The results indicated that protein degradation patterns of Xinjiang brown cattle beef cuts with different muscle fiber type composition were definitely different. The initial MFI of psoas major with higher muscle fiber type content, was higher than the initial MFI of longissimusdorsi and biceps femoris with higher muscle fiber typecontent, but the muscle fiber degradation rate of psoas major was lower than the rate of longissimusdorsi and biceps femoris. The significant positive correlation existed between the content of muscle fiber type A and the initial protein solubility, and significant negative correlation existed between muscle fiber type A content and protein solubility change rate. The results of muscle fiber ultrastruture and SDS-PAGE research were consistent with those provided by MFI and protein solubility. Ultrastructural investigation indicated that proteins of longissimusdorsi and biceps femoris degraded faster than proteins of psoas major. The degradation patterns of troponin-T and desmin were also different between the three beef cuts. The troponin-T and desmin degradation rate of the beef cuts with high muscle fiber type content was faster than that of the beef cuts with high muscle fiber typecontent. Protein degradation patterns of Xinjiang brown cattle beef with different muscle fiber type composition were definitely different during postmortem aging. The results would provide a theoretical basis for the regulation of postmortem aging process according to the different muscle fiber types and thus the development of high-grade Xinjiang brown cattle beef. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Fibers

Controlled terms: Beef  -  Degradation  -  Muscle  -  Proteins  -  Solubility

Uncontrolled terms: Degradation patterns  -  Desmin  -  Muscle fiber types  -  Negative correlation  -  Positive correlations  -  Protein degradation  -  Troponin t  -  Xinjiang

Classification code: 461.2 Biological Materials and Tissue Engineering

Biological Materials and Tissue Engineering

  -  801.4 Physical Chemistry

Physical Chemistry

  -  802.2 Chemical Reactions

Chemical Reactions

  -  804.1 Organic Compounds

Organic Compounds

  -  822.3 Food Products

Food Products

DOI: 10.6041/j.issn.1000-1298.2018.05.046

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

3. Design and Parameters Optimization of Electrostatic Powder Coating Device for Squid Tentacles

Accession number: 20183705807499

Title of translation:

Authors: Zou, Fuxing (1, 2); Lou, Jianzhong (3); Zhu, Pan’an (4); Li, Jianping (1); Ji, Mingdong (1); He, Xiangyi (1)

Author affiliation: (1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou; 310058, China; (2) School of Textile, Zhongyuan Institute of Technology, Zhengzhou; 451191, China; (3) School of Mechanical Engineering, Zhejiang Institute of Mechanical and Electrical Engineering, Hangzhou; 310053, China; (4) School of Agriculture and Biotechnology, Wenzhou Vocational College of Science and Technology, Wenzhou; 325006, China

Corresponding author: Li, Jianping(jpli@zju.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 390-396

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Adding seasoning powder to the surface of squid tentacles can increase its flavor and improve the appearance and taste after processing. At present, powder coating of squid tentacles are mainly done by manual work in Chinese aquatic products processing plants, the labor intensity is high,but the work efficiency is low. There were some deficiencies in the artificial squid tentacles coating,for example, in the process of coating,some powder was soaked by surface water on squid tentacles, which led to waste of powders because they can not be used again. Also, it was likely that the artificial coating of squid tentacles cause food contamination. During the process of coating,some areas were prone to be uncoated,and the thickness of the powder layer was not consistent. A new method of using air flow for powder conveying and applying high-voltage static electricity to charge the powder was proposed for powder coating. Due to the principle of that the same charges were repellent,the powder layer on squid tentacles surface was uniform. To obtain optimal coating conditions,electrostatic powder coating experimental device was designed and three relative humidities (RH) of 40%,60%,80% and four voltages of 0.kV,30.kV,60.kV and 90.kV were setted for electrostatic powder coating test. The results of electrostatic coating experiments showed that the high-voltage static electricity can improve the coating speed and increase the coating mass,the increase of static voltage can significantly increase the coating speed and the coating mass with relative humidity of 60%,the coating effect was not significant when RH was 80%,the coating speed was the fastest and the coating mass was the maximum with voltage of 30.kV and relative humidity of 40%. During the stage of 0~1. s,the amount of coating mass was increased the fastest, when relative humidity was 40%,the increase of coating mass was the most significant in 0~0.5.s. To compare the adhesion effect under different coating conditions,a centrifugal device was designed and made. The results of the test showed that the adhesion effect of powder was the best when the coating was done with relative humidity of 60% and voltage of 60.kV. The results can provide a reference for the design of later squid tentacles electrostatic coating equipment. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 29

Main heading: Molluscs

Controlled terms: Adhesion  -  Atmospheric humidity  -  Centrifugation  -  Coatings  -  Electrostatic coatings  -  Electrostatics  -  Powder coatings  -  Shellfish  -  Static electricity  -  Surface waters

Uncontrolled terms: Aquatic products  -  Centrifugal test  -  Electrostatic powder coating  -  Experimental devices  -  Food contamination  -  High voltage  -  Parameters optimization  -  Processing plants

Classification code: 443.1 Atmospheric Properties

Atmospheric Properties

  -  444.1 Surface Water

Surface Water

  -  461.9 Biology

Biology

  -  471 Marine Science and Oceanography

Marine Science and Oceanography

  -  701.1 Electricity: Basic Concepts and Phenomena

Electricity: Basic Concepts and Phenomena

  -  802.3 Chemical Operations

Chemical Operations

  -  813.2 Coating Materials

Coating Materials

  -  951 Materials Science

Materials Science

Numerical data indexing: Percentage 4.00e+01%, Percentage 6.00e+01%, Percentage 8.00e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.047

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

4. Design and Test of 2BFJ-24 Type Variable Fertilizer and Wheat Precision Seed Sowing Machine

Accession number: 20183705807462

Title of translation: 2BFJ-24

Authors: Jin, Xin (1, 2); Li, Qianwen (3); Yuan, Yanwei (3); Qiu, Zhaomei (1); Zhou, Liming (3); He, Zhitao (1)

Author affiliation: (1) College of Agricultural Engineering, Henan University of Science and Technology, Luoyang; 471003, China; (2) Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province, Luoyang; 471003, China; (3) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China

Corresponding author: Yuan, Yanwei(yyw215@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 84-92

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to improve the winter wheat sowing quality and fertilizer utilization rate and reduce production costs, and aiming at the extensive and low efficient characteristics of sowing and fertilizer application in winter wheat with moderate scale in central of China, based on the vehicle-based sensing of the CAN bus communication protocol and PIC control fusion technology, the 2BFJ-24 wheat precision sowing and variable fertilizer machine was designed. The system of machine consisted of sowing and fertilizing machinery parts, seed leakage monitoring parts, fertilizer jam alarm parts, variable fertilization control parts and vehicle computer. The seed row seed flow situation can be real-time monitored through the infrared photoelectric detection, and fertilizer drop signal can be real-time accessed by detecting changes in dielectric constant of the lower end of the fertilizer pipe. The machine field position can be obtained through the integrated GPS module, the fertilizer amount for current target location can be determined combined with the pre-loaded plots prescription, and the current fertilizer and flow information can be calculated based on the pressure sensor and computer to, according to the machine speed to adjust fertilizer amount in time, and ultimately achieve the process of sowing leaking or fertilizer blocked alarm and precision fertilization purposes. The field test results showed that the whole machine monitoring system can adapt to the complex environment field, with leak detection accuracy of up to 91% or more, fertilizer jam alarm error was less than 2%, and the variable fertilization accuracy rate was more than 96%, indicating that it had good practicality and economy. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Fertilizers

Controlled terms: Alarm systems  -  Computer control systems  -  Crops  -  Design  -  Experiments  -  Leak detection  -  Machinery  -  Quality control  -  Vehicle to vehicle communications

Uncontrolled terms: Complex environments  -  Current target locations  -  Fertilizer applications  -  Infrared photoelectric  -  Precision fertilizations  -  Variable control  -  Variable fertilizations  -  Wheat

Classification code: 716 Telecommunication; Radar, Radio and Television

Telecommunication; Radar, Radio and Television

  -  723.5 Computer Applications

Computer Applications

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821.4 Agricultural Products

Agricultural Products

  -  901.3 Engineering Research

Engineering Research

  -  913.3 Quality Assurance and Control

Quality Assurance and Control

Numerical data indexing: Percentage 2.00e+00%, Percentage 9.10e+01%, Percentage 9.60e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.010

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

5. Optimal Design and Experiment of Fully-automated Potted Eggplant Seedling Transplanting Mechanism

Accession number: 20183705807469

Title of translation:

Authors: Zhao, Yun (1); Liu, Xing (1); Xue, Xianglei (1); Zhang, Weixing (1); Shan, Yiyin (1); Zhou, Maile (1)

Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China

Corresponding author: Zhou, Maile(zhoumaile@126.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 152-160

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to realize the automatic transplanting of potted eggplant seedling, a fully-automated potted eggplant seedling transplanting mechanism was designed based on a new type of non-circular gear which was proposed according to Newton interpolation method and the kinematic model of the mechanism was built. Orthogonal experiment with three factors and three levels was carried out according to the combination of agronomy and agricultural machinery. The experiment factors were the size of the pot tray, the volume ratio of the matrix and the water content of the bowl. The experiment indexes were the strength of picking seedling and the loss rate of the matrix. Test results showed that it is beneficial for the full-automated mechanism to transplant the potted eggplant seedling when the size of the bowl was 105, the volume ratio of the matrix was 1, the water content of the pot body was 70%~80%, the picking strength was 2.70 N, and the loss rate of the mortar matrix was 2.94%. According to the mathematical model of transplanting mechanism and eggplant seedling agronomy requirements, computer-aided analysis and optimization software of the automatic transplanting mechanism was developed and used to obtain a set of parameters which satisfied the transplanting operation requirements. The optimized parameters were used for three-dimensional modeling and virtual simulation testing, and 3D printing technology was used to make a physical prototype for the trajectory verification test, which verified the validity and feasibility of the mechanism. The picking seedling tests and the transplanting tests certified the practicability of the mechanism. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: 3D printers

Controlled terms: Agronomy  -  Automation  -  Computer aided analysis  -  Kinematics  -  Testing

Uncontrolled terms: Non-circular gears  -  Orthogonal test  -  Parameter optimization  -  Potted eggplant seedling  -  Transplanting mechanisms

Classification code: 723.5 Computer Applications

Computer Applications

  -  731 Automatic Control Principles and Applications

Automatic Control Principles and Applications

  -  745.1.1 Printing Equipment

Printing Equipment

  -  821.3 Agricultural Methods

Agricultural Methods

  -  931.1 Mechanics

Mechanics

Numerical data indexing: Force 2.70e+00N, Percentage 2.94e+00%

DOI: 10.6041/j.issn.1000-1298.2018.05.017

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

6. Design and Experiment on Rotary Grate Concave Threshing-Separating Unit of Head-feeding Combine Harvester

Accession number: 20183705807471

Title of translation:

Authors: Liu, Zhenghuai (1); Dai, Sujiang (2); Tian, Liquan (1); Chen, Ni (2); Wang, Zhiming (1); Chen, Dejun (1)

Author affiliation: (1) Zhejiang Province Engineering Laboratory for Modern Agricultural Equipment Practical Technology, Jinhua Polytechnic, Jinhua; 321017, China; (2) Department of Mechanical and Electrical Engineering, Jinhua Polytechnic, Jinhua; 321017, China

Corresponding author: Chen, Dejun(cdj0579@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 169-178

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To solve the problem of threshing drum being jammed and low working efficiency in head-feeding combine harvester with the fixed grade concave threshing-separating unit, the rotary grate concave threshing-separating unit was designed. The rotary grate concave surface ran the same direction along cylinder arc of threshing drum. The dynamic differential equation was established by the force analysis of rice during being threshed. A test platform of the rotary grate concave threshing-separating unit was developed. The effects of three factors, such as the speed of threshing drum, the speed of grate concave and the speed of chain, on the four performance indexes, such as loss rate, broken rate, impurity content rate and threshing power consumption were investigated. The optimal structural parameters and operation parameters were explored by quadratics rotary orthogonal combination design experiment. The multi-objective optimization calculation was carried out. The results showed that the running rotary grate concave could effectively prevent the threshing drum from being jammed; the best combination of parameters was as follows: the rotating speed of the threshing drum was 550 r/min, the speed of the grate concave was 1 m/s, and the speed of the chain was 1.2 m/s. Correspondingly, the three indexes of loss rate, breakage rate and impurity content were 2.14%, 0.2% and 0.6%, respectively. The field test showed that equipped with a rotary grate concave threshing and separating unit the head-feeding combine harvester of rice production could work in the whole fast level with no jamming of threshing-separating unit, and improve working efficiency by more than 30% than the fixed grate concave. Each performance conformed to the national standard. The research result provided a theoretical basis for the design of head-feeding combine harvester for high-yielding rice. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 27

Main heading: Combines

Controlled terms: Agriculture  -  Chains  -  Differential equations  -  Efficiency  -  Feeding  -  Harvesters  -  Multiobjective optimization  -  Regression analysis  -  Separation  -  Speed   -  Structural optimization

Uncontrolled terms: Head-feeding combine  -  Operation parameters  -  Performance indices  -  Rotary grates  -  Structural parameter  -  Threshing and separating unit  -  Threshing-separating  -  Working efficiency

Classification code: 602.1 Mechanical Drives

Mechanical Drives

  -  691.2 Materials Handling Methods

Materials Handling Methods

  -  802.3 Chemical Operations

Chemical Operations

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  913.1 Production Engineering

Production Engineering

  -  921.2 Calculus

Calculus

  -  921.5 Optimization Techniques

Optimization Techniques

  -  922.2 Mathematical Statistics

Mathematical Statistics

Numerical data indexing: Percentage 2.00e-01%, Percentage 2.14e+00%, Percentage 3.00e+01%, Percentage 6.00e-01%, Rotational_Speed 5.50e+02RPM, Velocity 1.00e+00m/s, Velocity 1.20e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.05.019

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

7. Identification Method of Pinus yunnanensis Pest Area Based on UAV Multispectral Images

Accession number: 20183705807481

Title of translation:

Authors: Zhang, Junguo (1); Han, Huanqing (1); Hu, Chunhe (1); Luo, Youqing (2)

Author affiliation: (1) School of Technology, Beijing Forestry University, Beijing; 100083, China; (2) College of Forestry, Beijing Forestry University, Beijing; 100083, China

Corresponding author: Luo, Youqing(yqluo@bjfu.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 249-255

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to satisfy the needs of effective recognition in pest-affected region, a multispectral images acquisition platform was built to monitor the pest-related information efficiently and accurately in Yunnan pine forest region of Yunnan Province. Aneural network of Jeffries-Matusita(J-M)distance optimized back-propagation(BP)neural network was proposed based on unmanned aerial vehicle(UAV)multispectral images. Firstly, the method realized the optimization process of the training samples by introducing the J-M distance concept, which reduced the influence of both “similar spectral from multiple objects” and “multiple spectral from similar objects”. Then, the color and texture features of the images were extracted based on their color and the gray-scale co-occurrence matrix. Three bands of relative spectral reflectance, namely 580 nm, 680 nm and 800 nm were extracted as spectral characteristics. Meantime, five vegetation index models were established to identify pest area. Finally, BP neural network algorithm was applied for training and identifying four feature vector quantities, including color, texture, spectral and vegetation index, which greatly achieved the identification and classification goal of pest region. The proposed algorithm was compared with the traditional BP neural network and support vector machine(SVM)algorithm from both general classification precision and the Kappa index. The experimental results showed that the overall accuracy index of classification and the Kappa index of the algorithm reached 94.01% and 0.92, respectively, which was superior to traditional BP neural network and SVM algorithm. Besides the modeling time was shortened by 38% when compared with the traditional BP neural network method. The improved efficiency satisfied the high efficiency identification needs of Yunnan pine pest area in Xiangyun County. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Image processing

Controlled terms: Antennas  -  Backpropagation  -  Color  -  Efficiency  -  Feature extraction  -  Forestry  -  Image retrieval  -  Neural networks  -  Support vector machines  -  Unmanned aerial vehicles (UAV)   -  Vegetation

Uncontrolled terms: Back propagation neural networks  -  BP neural networks  -  Classification precision  -  Color and texture features  -  Forest pest  -  J-M distances  -  Multispectral images  -  Spectral characteristics

Classification code: 652.1 Aircraft, General

Aircraft, General

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  723.4 Artificial Intelligence

Artificial Intelligence

  -  741.1 Light/Optics

Light/Optics

  -  913.1 Production Engineering

Production Engineering

Numerical data indexing: Percentage 3.80e+01%, Percentage 9.40e+01%, Size 5.80e-07m, Size 6.80e-07m, Size 8.00e-07m

DOI: 10.6041/j.issn.1000-1298.2018.05.029

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

8. Global Path Planning Algorithm and Experiment Based on GNSS-controlled Precise Land Leveling System

Accession number: 20183705807455

Title of translation: GNSS

Authors: Liu, Gang (1, 2); Kang, Xi (1, 2); Xia, Youxiang (1, 2); Jing, Yunpeng (1, 2)

Author affiliation: (1) Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, China Agricultural University, Beijing; 100083, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 27-33

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: GNSS controlled land leveling technology can improve farmland flatness effectively. To achieve saving the water and fertilizer, increase the effect of income so as to solve the problem on the lack of operation guidance and low efficiency in GNSS controlled land leveling system, a method of global path planning was proposed based on GNSS land leveling system. The theory of farmland leveling system was combined, and the conditions of farmland actual leveling were analyzed. Firstly, the actual condition of farmland was analyzed, and the farmland terrain environment model which was suitable for land-leveling was created, and then the farmland terrain information map was generated, from which the characteristics of farmland terrain distribution can be obtained. Under the condition of the least amount of invalid work about loaded and unloaded, and the condition of the least amount of steering and repetitive work, the traversal of the entire farmland land formation path was generated. The tension sensor was used to monitor the real time load of forklift. Then the simulated experiments were done and the data were analyzed, and the simulation results showed that compared with the conventional leveling method, in the method, the time of loaded and unloaded was significantly reduced, and the time of work was saved by more than 50%. The method can plan effective paths, reduce inefficient operating time, and increase the efficiency of land-leveling by more than 30%. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 28

Main heading: Farms

Controlled terms: Efficiency  -  Landforms  -  Leveling (machinery)  -  Motion planning

Uncontrolled terms: Actual conditions  -  Environment modeling  -  Environmental model  -  Global path planning  -  Land leveling  -  Repetitive works  -  Simulated experiments  -  Terrain analysis

Classification code: 481.1 Geology

Geology

  -  603.1 Machine Tools, General

Machine Tools, General

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  913.1 Production Engineering

Production Engineering

Numerical data indexing: Percentage 3.00e+01%, Percentage 5.00e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.003

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

9. Design and Experiment of Strip Rotary-cut-throw Anti-blocking Implement

Accession number: 20183705807460

Title of translation:

Authors: Zhao, Hongbo (1); He, Jin (1); Li, Hongwen (1); Liu, Chunge (2); Zheng, Kan (1); Zhang, Zhiqiang (1)

Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China

Corresponding author: He, Jin(hejin@cau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 65-75

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: According to the existing problems of no and minimum-till wheat seeding in maize straw covered field in double-cropping system area in North-China Plain, such as residue blockage, high power consumption, a strip rotary-cut-throw anti-blocking implement was developed. Integrated with the principle of anti-blocking implement, the distance L between opener and the anti-blocking implement, sliding-cutting angle τ of the plane-straight blade and rotary speed n were found to be the key parameters which affected anti-blocking performance and power consumption through analysis in terms of residue flow/throwing and mechanical analysis of the implement. Orthogonal experiment was conducted by DEM simulation to optimize the parameters of the implement and analyze the key parameters’ effect on residue blockage and power consumption, the result showed that when the distance was 100 mm, cutting edge was 50°, rotate speed was 320 r/min, which were optimum parameters set among the trail points, power consumption of the strip rotary-cut-throw anti-blocking implement and the opener was 2.8 kW, blocked straw number was 43 in one dm and it could not cause blockage, and then strength check was conducted for this optimum blade by using finite element method and the maximum stress was 1.387×108 Pa of which was safe. Field experiment of wheat seeding was conducted on a no-till maize straw covered field, the result showed that strip cut-throw plane-straight blade anti-blocking implement could effectively solve the problem of blockage almost as good as traditional rotary blade under straw coverage of 0.8 kg/m2, 1.6 kg/m2 and 2.4 kg/m2 at travel speed of 1 m/s, 1.25 m/s and 1.5 m/s, which satisfied the requirements of national standard of no-till fertilization seeder. Compared with strip-rotary implement, power consumption was reduced by 13.83%, soil disturbance was reduced by 37.5 percent points and furrow depth stability was improved by 8.2 percent points. The error of DEM simulation to field experiment in furrow width and depth was 14% and 1.3%, which was tolerable, and the simulation could be referenced to the optimization of strip rotary-cut-throw anti-blocking implement. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 37

Main heading: Electric power utilization

Controlled terms: Protactinium

Uncontrolled terms: Blocking performance  -  High power consumption  -  Mechanical analysis  -  Orthogonal experiment  -  Plane-straight blade  -  Rotary-cut-throw  -  Sliding cutting angles  -  Wheat

Classification code: 622.1 Radioactive Materials, General

Radioactive Materials, General

  -  706.1 Electric Power Systems

Electric Power Systems

Numerical data indexing: Percentage 1.30e+00%, Percentage 1.38e+01%, Percentage 1.40e+01%, Percentage 3.75e+01%, Percentage 8.20e+00%, Power 2.80e+03W, Rotational_Speed 3.20e+02RPM, Size 1.00e-01m, Surface_Density 1.60e+00kg/m2, Surface_Density 2.40e+00kg/m2, Surface_Density 8.00e-01kg/m2, Velocity 1.00e+00m/s, Velocity 1.25e+00m/s, Velocity 1.50e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.05.008

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

10. Electrical Back Pressure Control System for 4WD Front-axle Articulated Vehicle

Accession number: 20183705807501

Title of translation:

Authors: Liu, Haochun (1); Li, Zhiwei (1); Wu, Gang (1); Zhou, Shilin (1); Zhao, Chuang (1)

Author affiliation: (1) College of Engineering, South China Agricultural University, Guangzhou; 510642, China

Corresponding author: Li, Zhiwei(zhiweili@scau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 404-411

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Driven by a hydraulic open loop system, which consisted of engine-CVT-fixed displacement pump and fixed displacement wheel-motors, a 4WD front-axle articulated vehicle is needed to solve the problem when it is walking in negative loads situation. Currently, most of the hydraulic traveling machinery with open-loop system uses the counterbalance valve to control the negative loads. However, traditional counterbalance valves still have the problems of high cost, difficult maintenance and high power consumption. To solve these problems, a vehicle simulation model was built and tested. The control system included an electro-proportional relief valve, a pressure sensor and electronic control system with programmable processor. The electro-proportional relief valve was mounted on the outlet port of the hydraulic system. The pressure sensor was installed on the inlet port of the traveling motors. By reading the signal of the pressure sensor, and adjusting the cracking pressure of the electro-proportional relief valve to realize the hydraulic motors meter-out flow control. The results showed that this system can correctly judge the driver’s intension, improve energy efficiency by reducing the cracking pressure when the vehicle working in positive load. When the vehicle working in negative load, the system would choose the suitable cracking pressure to meet the driver’s expectations and keep the hydraulic motors from overrunning. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Front axles

Controlled terms: All wheel drive vehicles  -  Control systems  -  Energy efficiency  -  Hydraulic machinery  -  Hydraulic motors  -  Pressure control  -  Pressure relief valves  -  Pressure sensors  -  Problem solving

Uncontrolled terms: Articulated vehicle  -  Back pressure controls  -  Cracking pressures  -  Electro-hydraulic proportional control  -  Electronic control systems  -  High power consumption  -  Hydraulic system  -  Programmable processors

Classification code: 525.2 Energy Conservation

Energy Conservation

  -  601.2 Machine Components

Machine Components

  -  632.2 Hydraulic Equipment and Machinery

Hydraulic Equipment and Machinery

  -  662.4 Automobile and Smaller Vehicle Components

Automobile and Smaller Vehicle Components

  -  731.1 Control Systems

Control Systems

  -  731.3 Specific Variables Control

Specific Variables Control

  -  944.3 Pressure Measuring Instruments

Pressure Measuring Instruments

DOI: 10.6041/j.issn.1000-1298.2018.05.049

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

11. Establishing Method of Crop Water Stress Index Empirical Model of Field Maize

Accession number: 20183705807479

Title of translation:

Authors: Zhang, Liyuan (1, 2); Niu, Yaxiao (1, 2); Han, Wenting (1, 3); Liu, Zhikai (1, 2)

Author affiliation: (1) College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling; Shanxi; 712100, China; (2) Key Laboratory of Agricultural Internet of Things, Ministry of Agriculture, Yangling; Shanxi; 712100, China; (3) Institute of Soil and Water Conservation, Northwest A&F University, Yangling; Shanxi; 712100, China

Corresponding author: Han, Wenting(hanwt2000@126.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 233-239

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The establishment of crop water stress index (CWSI) empirical model was closely related to climate and planting condition. Filed maize CWSI empirical model was established in Dalat Banner, Ordos City, Inner Mongolia, trying to get the best empirical model. Different irrigation strategies were applied in the vegetative stage (V), reproductive stage (R) and maturation stage (M), respectively. Maize canopy temperature was obtained by infrared thermometry. Air temperature and humidity were acquired in the field and the adjacent standard weather station, respectively. Firstly, two CWSI lower lines was built, combined with maize canopy temperature, and based on field and weather station air temperature and humidity. And then based on the above CWSI lower lines, four CWSI empirical models were established with 5 as the CWSI upper line or using the saturated vapor pressure gradient (VPG) to get the CWSI upper line, respectively. Results showed that CWSI empirical model based on weather station air temperature and humidity was very volatile, its value always beyond the normal range of 0~1, which can not reflect the water stress status of maize. However, CWSI empirical model based on filed air temperature and humidity monitored the water stress status well. CWSI value of three different treatments of 100%, 52% and 28% in M stage were 0.03, 0.14 and 0.32, respectively, having good numerical gradient. The CWSI values, using 5 as the upper line, were smaller, compared with the CWSI values using the upper line based on VPG, which could reflect the water stress status well. The CWSI values in M stage were 0.02, 0.10 and 0.22, respectively, with a reasonable numerical gradient. After preliminary analysis, it was considered that the CWSI empirical model based on filed air temperature and humidity was reasonable and could effectively monitor the water stress status of filed maize in Dalat Banner, Ordos City, Inner Mongolia. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Climate models

Controlled terms: Atmospheric temperature  -  Crops  -  Dielectric properties  -  Thermometers  -  Weather information services

Uncontrolled terms: Crop water stress indices  -  Empirical model  -  Filed maize  -  Infrared thermometry  -  Water stress

Classification code: 443 Meteorology

Meteorology

  -  443.1 Atmospheric Properties

Atmospheric Properties

  -  821.4 Agricultural Products

Agricultural Products

  -  931.2 Physical Properties of Gases, Liquids and Solids

Physical Properties of Gases, Liquids and Solids

  -  944.5 Temperature Measuring Instruments

Temperature Measuring Instruments

Numerical data indexing: Percentage 1.00e+02%, Percentage 2.80e+01%, Percentage 5.20e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.027

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

12. Numerical Optimization and Experimental Analysis of Axial-flow Pump System for Bell-type Inlet Passage

Accession number: 20183705807474

Title of translation:

Authors: Xie, Chuanliu (1); Tang, Fangping (1); Zhu, Quanrong (2); Liu, Haiyu (1); Wu, Chenhui (1); Yang, Fan (1)

Author affiliation: (1) School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou; 225127, China; (2) Jiangsu LEO Co., Ltd., Wuxi; 214023, China

Corresponding author: Tang, Fangping(tangfp@yzu.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 195-203

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Based on the RNG k-Ε turbulence model and Reynolds-averaged N-S equation, the CFD software was used to simulate the three-dimensional flow value of axial flow pump device for bell-type inlet channel and design the hydraulic performance optimization. Firstly, the bell-type inlet channel was optimized through the part to overall method, and then the elbow outlet channel of the whole pump device was optimized, three-dimensional parametric modeling can be made for the inlet and outlet flow channel. The inlet flow channel took the outlet section velocity uniformity and the hydraulic loss as the objective function. At the same time, the outlet flow channel took the pump device efficiency as the objective function. According to the design flow conditions and the control parameters numerical simulation of the inlet and outlet flow channels, the influence of different control sizes on the hydraulic performance of inlet and outlet channels can be analyzed. Finally, the reliability of the numerical results of the optimization scheme was verified by the model test. Numerical simulation and model test showed that by optimization the flow can be improved. After optimization, the hydraulic loss of the bell-type inlet channel was reduced from 0.348 m to 0.148 m, while the outlet velocity uniformity was increased from 54.59% to 93.35%. Also, the hydraulic loss of the elbow-type outlet channel was reduced from 0.464 m to 0.415 m. When the model pump device test in the blade placement angle was 0°, the design conditions efficiency can be up to 74%. The maximum efficiency was 76.47% and the high-efficient operating range was wide. There was no whirlpool produced in both inlet and outlet channels with uniform flow. The error of the external characteristic curve was less than 5% in the simulation and model test. The hydraulic loss curve of the inlet channel was also the same. The less hydraulic losses of the inlet and outlet flow channels after optimization, indicated that the numerical simulation involved in the optimization of the pump was reasonable and reliable. Using the numerical simulation to optimize the calculation of the axial flow pump of the bell-type inlet channel can shorten the test cycle and save the cost. It also can guide the engineering application accurately and reliably, and provide reference for the design and safe operation of the similar pump station. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Computational fluid dynamics

Controlled terms: Axial flow  -  Bells  -  Channel flow  -  Efficiency  -  Inlet flow  -  Navier Stokes equations  -  Numerical models  -  Optimization  -  Pumps  -  Rhenium compounds   -  Testing  -  Turbulence models

Uncontrolled terms: Axial flow pump  -  Engineering applications  -  External characteristic  -  Flow channels  -  Model tests  -  Numerical optimizations  -  Simulation and modeling  -  Three-dimensional flow

Classification code: 618.2 Pumps

Pumps

  -  631.1 Fluid Flow, General

Fluid Flow, General

  -  723.5 Computer Applications

Computer Applications

  -  752.1 Acoustic Devices

Acoustic Devices

  -  913.1 Production Engineering

Production Engineering

  -  921 Mathematics

Mathematics

Numerical data indexing: Percentage 5.00e+00%, Percentage 5.46e+01% to 9.33e+01%, Percentage 7.40e+01%, Percentage 7.65e+01%, Size 3.48e-01m to 1.48e-01m, Size 4.64e-01m to 4.15e-01m

DOI: 10.6041/j.issn.1000-1298.2018.05.022

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

13. Virtual Simulation and Prototype Test for Behavior of Robot in Picking Process

Accession number: 20183705807456

Title of translation:

Authors: Luo, Lufeng (1); Zou, Xiangjun (2); Lu, Qinghua (1); Yang, Zishang (2); Zhang, Po (2); Xiong, Juntao (3)

Author affiliation: (1) College of Mechanical and Electrical Engineering, Foshan University, Foshan; 528231, China; (2) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou; 510642, China; (3) College of Mathematics and Informatics, South China Agricultural University, Guangzhou; 510642, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 34-42

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To test and verify the intelligent algorithm of anti-collision behavior and planning of picking robot, a simulation system based on virtual reality for picking robot was designed. Taking grape picking robot for example, a virtual reality environment for picking robot working scene was firstly built, which was used to simulate the testing environment of facility vineyard. Then the kinematics modeling of virtual picking robot was constructed by using the D-H parameter calculation method. An end-effector with clamping-lifting-cutting steps was designed for grape picking robot based on grape shape characteristic, and subsequently the control model of picking process of the end-effector was built. The space pose transformation between the end joint of manipulator and actuator was set up, and a trajectory planning method for manipulator was designed. The data communication interface between visual perception and virtual robot was designed, and the virtual picking robot simulation system was developed based on the virtual reality software platform EON. To verify the practicability of this simulation system, totally 18 times picking tests for grape anti-collision path planning and shearing behavior were implemented on the developed simulation system, and the success rate was up to 88.89%. Then the algorithms were transplanted to the physical prototype, totally 43 times of tests were implemented, and the success rate was about 86.05%. The testing results showed that the simulation system developed can provide a virtual test platform for the testing and improvement of the intelligent behavior algorithm of the picking robot. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: End effectors

Controlled terms: Collision avoidance  -  Computer software  -  Intelligent robots  -  Manipulators  -  Motion planning  -  Robot programming  -  Testing  -  Virtual reality  -  Visual servoing

Uncontrolled terms: Intelligent Algorithms  -  Intelligent behavior  -  Picking robot  -  Prototype tests  -  Shape characteristics  -  Simulation  -  Trajectory planning method  -  Virtual-reality environment

Classification code: 723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  731.5 Robotics

Robotics

  -  731.6 Robot Applications

Robot Applications

  -  914.1 Accidents and Accident Prevention

Accidents and Accident Prevention

Numerical data indexing: Percentage 8.60e+01%, Percentage 8.89e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.004

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

14. Label-free and Rapid Determination of Zearalenone by Surface Plasmon Resonance Biochip

Accession number: 20183705807494

Title of translation:

Authors: Qi, Pan (1); Li, Shiping (2, 3); Zhong, Jin’gang (2, 3); Li, Ying (3, 4)

Author affiliation: (1) School of Information, Guangdong Communication Polytechnic, Guangzhou; 510650, China; (2) College of Science and Engineering, Jinan University, Guangzhou; 510632, China; (3) Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University, Guangzhou; 510632, China; (4) Pre-university, Jinan University, Guangzhou; 510610, China

Corresponding author: Li, Ying(916407691@qq.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 355-360

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Zearalenone (ZEN) is a common fungal toxin in agricultural products. The existing detection methods of ZEN are complicated, with precious instrument, and the samples usually need to be marked. Based on the self-developed surface plasmon resonance (SPR) biosensor, the biochip for ZEN detection was prepared and the direct detection method and inhibition detection method were proposed. The preparation process of the biochip was as follow: modifying the gold film by self-assembled monolayer (SAM) technique; activating the gold film surface with N-ethyl-N’-(3-dimethylaminopropyl) carbodiimide (EDC) solution; fixing the ZEN-BSA on the surface of the gold film as the biological probe; inactivating the remaining ester bond with ethanolamine. Direct detection method was to detect the ZEN antibody directly by using the biochip; and the standard curve of direct detection of ZEN antibody in the concentration range of 10~50.μg/mL was established. In the inhibition detection method, the ZEN toxin and ZEN antibody with different concentrations were mixed and then flowed into the chip surface. The ZEN small molecules in the sample would inhibit the binding between antibody and the biological probe (ZEN-BSA) on the chip surface. The concentration of ZEN small molecule could be calculated according to the inverse relationship between the ZEN small molecule concentration and the changes of response value. The standard curve of inhibition detection method for ZEN toxin small molecule in the concentration range of 0~32.ng/mL was established. The experimental results showed that the direct detection method was suitable for screening of ZEN antibody and basic research of immune kinetics; in the concentration range of 10~50.μg/mL, the relationship between SPR response value and ZEN concentration was basically linear; and the standard curve equation was: f(x)=0.002.5x-0.477.0, R2=0.995.2. At least 50.sets of samples can be detected continuously. After being used for more than 50.sets of samples, the response value of SPR was decreased, which indicated the probe that was fixed on the surface of the biochip was damaged. The chip regeneration can be achieved after HCl was flowed into the chip surface, and the sensor chip can be used continually after re-assembly and fixation of the biological probe. The detection limit of the inhibition detection method was up to 2.ng/mL; the standard deviation of the repeated tests (5.times) for each concentration was less than 8%; and the detection of a single sample only costed 6.min. The inhibition detection method could be used for rapid detection of trace ZEN toxin small molecule. The detection method of ZEN based on the surface plasmon resonance was simple. The samples did not need to be marked, which could avoid the environment pollution. The developed device was portable with low cost, as the cost of the entire SPR system was no more than 30.000.yuan which was far below the price of commercial SPR instrument, and the cost of each biochip was less than 200.yuan; the device was stable and portable, its size and weight were like the host of personal computer. The biochip preparation process and the immune response detection process could be monitored in real time. The device and method could be expected to be used for on-site rapid detection of ZEN, thus can effectively prevent ZEN from harming food safety. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Surface plasmon resonance

Controlled terms: Agricultural products  -  Antibodies  -  Biochips  -  Chemical detection  -  Chlorine compounds  -  Costs  -  Film preparation  -  Gold  -  Inverse problems  -  Metallic films   -  Molecules  -  Personal computers  -  Plasmons  -  Probes  -  Self assembled monolayers  -  Toxic materials

Uncontrolled terms: Concentration ranges  -  Environment pollution  -  Inverse relationship  -  Label free  -  Preparation process  -  Standard deviation  -  Surface plasmon resonance biosensor  -  Zearalenone

Classification code: 461 Bioengineering and Biology

Bioengineering and Biology

  -  461.9.1 Immunology

Immunology

  -  547.1 Precious Metals

Precious Metals

  -  722.4 Digital Computers and Systems

Digital Computers and Systems

  -  801 Chemistry

Chemistry

  -  821.4 Agricultural Products

Agricultural Products

  -  911 Cost and Value Engineering; Industrial Economics

Cost and Value Engineering; Industrial Economics

  -  931.3 Atomic and Molecular Physics

Atomic and Molecular Physics

DOI: 10.6041/j.issn.1000-1298.2018.05.042

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

15. Influence of Division Pier on Pressure Fluctuation and Internal Flow Pattern in Outlet Conduit of Axial-flow Pumping System

Accession number: 20183705807476

Title of translation:

Authors: Yang, Fan (1); Chen, Shijie (1); Liu, Chao (1); Wang, Maoyun (2); Zhou, Jiren (1)

Author affiliation: (1) School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou; 225127, China; (2) Jiangsu Provincial Flood Control and Drought Relief Center, Nanjing; 211500, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 212-217

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to investigate the influence of division pier on the pressure fluctuation and internal flow of outlet conduitat different rotational speeds, some high-precision digital pressure sensors CY302 and red threads were installed in the straight outlet conduit, fluctuating pressure signals were obtained and recorded under different operating conditions. The results showed that read threads were inclined under the small flowrate condition, while red threads were horizontal approximately under the optimal and large flowrate conditions. With the increase of flowrate, read threads were more horizontal. Under the same conditions of rotational speed and flowrate, the average values of pulsating amplitude root mean square in the straight outlet conduits without division pier were larger than that in the straight outlet conduits with division pier. With the increase of flowrate, the root mean square of pulsating amplitude was decreased gradually at the same rotational speed for straight outlet conduits with and without division pier. At the same flowrate, with the increase of rotational speed, the root mean square of pulsating amplitude was increased gradually for straight outlet conduits with and without division pier. The main frequency of each measuring points was the integer multiple relationship with the rotational frequency under the optimal operating condition of different rotational speeds for the straight outlet conduit with division pier, while the main frequency of each measuring points was not that. Division pier can improve flow pattern of straight outlet conduit, decrease the pulsating amplitude, but the improvement effect was also depended on guide vane outlet velocity circulation and flowrate under different operating conditions. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Piers

Controlled terms: Axial flow  -  Flow fields  -  Flow patterns  -  Pumping plants  -  Speed

Uncontrolled terms: Different operating conditions  -  Digital pressure sensors  -  Flow pumping  -  Internal flow patterns  -  Model tests  -  Optimal operating conditions  -  Outlet conduits  -  Pressure fluctuation

Classification code: 407.1 Maritime Structures

Maritime Structures

  -  446 Waterworks

Waterworks

  -  631.1 Fluid Flow, General

Fluid Flow, General

DOI: 10.6041/j.issn.1000-1298.2018.05.024

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

16. Influences of Biochar Supply on Water and Soil Erosion in Slopping Farm-land of Black Soil Region

Accession number: 20183705807486

Title of translation:

Authors: Wu, Yu (1, 2); Liu, Hui (3); Yang, Aizheng (4); Zhao, Yusen (1)

Author affiliation: (1) College of Forestry, Northeast Forestry University, Harbin; 150040, China; (2) Heilongjiang Agricultural Reclamation Survey and Research Institute, Harbin; 150090, China; (3) College of Science, Northeast Agricultural University, Harbin; 150030, China; (4) Faculty of Science, University of Copenhagen, Copenhagen; DK-2630, Denmark

Corresponding author: Zhao, Yusen(zhaoys1957@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 287-294

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To explore the effects of biochar on soil and water conservation in slopping farm-land of black soil region, the experiments for the influences of different amounts of biochar supply (0.t/hm2,25.t/hm2,50.t/hm2,75.t/hm2 and 100.t/hm2) on soil structure, water holding property, runoff and sediment control, etc. were conducted in the run-off plots, which were located at the slopping farm-land with three degrees of terrain slope in Hongxing state farm of Beian City, Heilongjiang Province in the typical black soil belt. The results showed that the biochar could effectively improve the soil structure in black soil region, and the soil bulk density was decreased with the increase of amount of biochar, but the soil porosity was just opposite. And some indexes for indicating the soil water holding capacity, such as saturated soil water content, field water capacity and soil water storage were all increased with the increase of biochar supply amount. The run-off and soil erosion in slopping farm-land could also be controlled by suitable supply of biochar, the best treatment for run-off and sediments control was that with 75.t/hm2, and the effect of run-off control was better than that of the sediment control. Biochar supply also could reduce the soil nutrient loss and improve the spacial distribution of soil nutrient at different degrees, and the soil nutrient contents for the four treatments of biochar supply were all higher than that without biochar supply, and the evenness degree of soil nutrients distribution was also improved obviously, which made the differences of soil nutrients between upslope and downslope reduced. The results could provide a new way for efficient, green and recycling utilization of straw resource in the northeast black soil region, the theoretical foundation for prevention and control of water and soil erosion in slopping farm-land of black soil region, which have important significance to promote the regional sustainable development of agriculture. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 29

Main heading: Soil conservation

Controlled terms: Erosion  -  Nutrients  -  Porosity  -  Sediments  -  Soil moisture  -  Water conservation  -  Water recycling

Uncontrolled terms: Bio chars  -  Black soil regions  -  Regional sustainable development  -  Saturated soil-water contents  -  Soil and water conservation  -  Soil structure  -  Theoretical foundations  -  Water holding

Classification code: 444 Water Resources

Water Resources

  -  483 Soil Mechanics and Foundations

Soil Mechanics and Foundations

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  931.2 Physical Properties of Gases, Liquids and Solids

Physical Properties of Gases, Liquids and Solids

DOI: 10.6041/j.issn.1000-1298.2018.05.034

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

17. Design and Optimization Experiment of Separation Device for Tomato Chain Paper Pot Seeding Transplanter

Accession number: 20183705807470

Title of translation:

Authors: Han, Xia (1, 2); Chen, Haitao (1)

Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) College of Engineering, Heilongjiang Bayi Agricultural University, Daqing; 163319, China

Corresponding author: Chen, Haitao(htchen@neau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 161-168

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Tomato paper pot transplanting technology is one of the effective ways to obtain the high yield of tomato. Paper pot seedling automatic transplanting mechanization operation was generally done by the seedling taker which separated the pot seedling and put it into the planting apparatus. Then the pot seedling was implanted by the planting apparatus, the automatic transplanting was finished. In order to improve the efficiency of tomato paper transplanting, ensure the high speed and orderly separation of tomato seedling, solve the problem of high damage rate of tomato pot during transplanting with chain paper pot seedling, the angle adjustable tomato chain paper pot transplanting test bed was designed. Based on the analysis of working principle of the separating device and extraction device and the relationship between both of them, single tomato paper pot seedling was used as the research object. The operation process of tomato paper pot seedling completed from extraction device to separation device was analyzed and the mechanical model was established. In order to obtain the best working parameter combination of the test bed, the quadratic orthogonal rotation center combination test method was used to extract test factors such as the extraction speed, the speed ratio of the separating wheel to the leading wheel and the tilting angle of the separation wheel. The regression model between each factor and the evaluation index was established by taking the separation rate and the pot seedling damage rate as the evaluation indexes to carry out the test. The contribution rate of each factor to the evaluation index was analyzed. The results showed that the contribution rate of each factor to the seedling separation rate was in the order of the tilting angle of the separating wheel, the speed ratio of the separating wheel to the leading wheel, and the extraction speed. The contribution rate of each factor to the pot seedling damage rate was in the order of the ratio of the separating wheel to the leading wheel, the extraction speed and the tilting angle of the separating wheel. By optimizing the regression model, the optimum working parameters of the metering device were as follows: the separation rate achieved 90% and pot seedling damage rate was less than 5% when the extraction speed was 8~10 m/min, the speed ratio was 2.5~4.6 and the tilting angle of the separation wheel was obtained as 18°. The research provided theoretical support and technical reference for the innovation, research and optimization of tomato chain paper pot transplanting machine. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Fruits

Controlled terms: Agricultural machinery  -  Chains  -  Equipment testing  -  Extraction  -  Paper  -  Regression analysis  -  Speed  -  Testing  -  Transplants  -  Wheels

Uncontrolled terms: Design and optimization  -  Optimum working parameters  -  Parameter optimization  -  Quadratic orthogonal rotation  -  Separation devices  -  Tomato  -  Transplanting machine  -  Working parameters

Classification code: 462.4 Prosthetics

Prosthetics

  -  601.2 Machine Components

Machine Components

  -  602.1 Mechanical Drives

Mechanical Drives

  -  802.3 Chemical Operations

Chemical Operations

  -  811.1 Pulp and Paper

Pulp and Paper

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  821.4 Agricultural Products

Agricultural Products

  -  922.2 Mathematical Statistics

Mathematical Statistics

Numerical data indexing: Percentage 5.00e+00%, Percentage 9.00e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.018

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

18. Investigation on Freeze-thaw Stability of Soy Protein via Enzymatic Modification Based on Maillard Reaction

Accession number: 20183705807495

Title of translation:

Authors: Wang, Xibo (1); Yu, Jie (1); Wang, Xiaodan (1); Chen, Shuang (1); Cui, Qiang (1); Jiang, Lianzhou (1)

Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 361-367

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Soy protein due to its amphiphilic property has been widely accepted as an emulsifier in the food industry. Many emulsion products such as ice cream or other frozen food need freezing storage to either extend products shelf life and/or maintain the best sensory/texture attributes. In this case, the freeze-thaw stability is essential for this type of application. When the oil-in-water emulsions were frozen, the absorption of oil-water interface was decreased, resulting in coalescence, flocculation, sedimentation, creaming, oiling off and Ostwald ripening. Therefore, the investigation of limited hydrolysis combined with Maillard-induced glycation on improving the freeze-thaw stability of soy protein isolate (SPI) was carried out. Soy protein isolate hydrolysate (SPH) was first prepared by trypsin with different hydrolysis degrees. Afterwards, SPI and SPH were conjugated with dextran to form a covalent complex macromolecule, which were named as SPI-D and SPH-D, respectively. Covalent bond was formed between SPI/SPH and dextran molecules via the glycation reaction when it was confirmed by grafting degree, browning index and fluorescence spectra analysis. Subsequently, the freeze-thaw stability of SPI-D and SPH-D was evaluated. After three freeze-thaw cycles, the characters of SPH-D emulsions exhibited smaller values than those of SPI-D emulsions in terms of particle size, coalescence degree and oiling off. In addition, SPH3-D emulsions were more stable after freeze-thaw treatment compared with other emulsions. After three freeze-thaw cycles, the particle size, coalescence degree and oiling off of SPH3-D were decreased by 48.28%, 81.61% and 63.81% compared with SPI-D, respectively. Confocal laser scanning microscopy (CLSM) was used to investigate its microstructure. It was found that the fresh emulsions were distributed uniformly without obvious differences. After three freeze-thaw cycles, there was a large number of irregularly shaped individual oil droplets appeared in SPI-D emulsions. In sharp contrast, oil droplets and aggregates were all relatively small in SPH-D emulsions, which was in accordance with the results of particle size, coalescence degree and oiling off. Thus, including information on limited proteolysis composition and SPH-D structure in order to further interpret this relation was necessary. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 34

Main heading: Freezing

Controlled terms: Coalescence  -  Dextran  -  Drops  -  Emulsification  -  Emulsions  -  Food storage  -  Glycosylation  -  Grafting (chemical)  -  Hydrodynamics  -  Hydrolysis   -  Oils and fats  -  Ostwald ripening  -  Particle size  -  Proteins  -  Proteolysis  -  Stability  -  Thawing  -  Thermal processing (foods)  -  Water absorption

Uncontrolled terms: Amphiphilic property  -  Confocal laser scanning microscopy  -  Enzymatic modification  -  Freeze-thaw stability  -  Maillard reaction  -  Oil water interfaces  -  Oil-in-water emulsions  -  Soy protein isolates

Classification code: 801.2 Biochemistry

Biochemistry

  -  801.3 Colloid Chemistry

Colloid Chemistry

  -  802.2 Chemical Reactions

Chemical Reactions

  -  802.3 Chemical Operations

Chemical Operations

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

  -  822.1 Food Products Plants and Equipment

Food Products Plants and Equipment

  -  822.2 Food Processing Operations

Food Processing Operations

Numerical data indexing: Percentage 4.83e+01%, Percentage 6.38e+01%, Percentage 8.16e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.043

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

19. Extraction and Equipment Design of Ethanol Separation from Solid-state Fermented Crushed Straw Material by Planar Thermal Source

Accession number: 20183705807491

Title of translation:

Authors: Zhou, Jingzhi (1); Feng, Junxiao (1, 2)

Author affiliation: (1) School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing; 100083, China; (2) Beijing Key Laboratory for Energy Conservation and Emission Reduction in Metallurgical Industry, Beijing; 100083, China

Corresponding author: Feng, Junxiao(jxfeng@ustb.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 330-341

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Annual production of straw is 600~800.million tons in China. The advanced solid-state fermentation technology (ASSF) and solid-state fermented crushed straw material had been developed to acquire ethanol and increase the economical utilization level of straw. However, the high cost of ethanol separation from fermented material is the biggest problem un-solved. Planar thermal source (PTS) was used to separate ethanol from solid-state fermented crushed straw material (SSFM) instead of water steam. In order to facilitate the study, fermented material and dry material uniformly added with ethanol solution were heated on thermal balance under the same environmental condition. The mass, wet content, ethanol concentration in wet of control group and test group were the same. The mass loss curve of them was familiar. As a result, from the macro view, dry material uniformly added with ethanol solution (called prepared material) can be used on study instead of fermented material, which made it easier to study quantitatively. Complete thermogravimetric test was done on prepared material to study the material wet change rules. Factors considered were heating temperature T (20~100), wet content θ (10%~90%), ethanol concentration in wet ω (3%~11%). The weight order of factors on material wet change speed Vloss,e in descending trend was T, θ and ω, and ω can be ignored for that was an order of magnitude less important than the other factors. Vloss,e was linearly increased with the increase of T, and increased by power function with the increase of θ. Vloss,e model with T and θ was regressed. As there was no chemically combined water in prepared material, heating material can be considered as heating ethanol solution in material-shaped electric heating device. According to multi data, equations for ethanol solution evaporation coefficient K were derived. Above all, model of ethanol separation from SSFM by PTS was derived. The cost model was added at last. Software was programmed to calculate the separation process and its cost. The result showed that the cost of PTS method was obviously lower than that of the current water steam method. The new method would significantly promote the ASSF technology to produce renewable energy. The study can also be used as reference on drying process of other crushed plant material. In the end, a set of production equipment for continuous ethanol separation from fermented material by PTS was given. The design formulas were given and a sample set of industrial level equipment was calculated. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 25

Main heading: Source separation

Controlled terms: Ethanol  -  Fermentation  -  Heating  -  Separation

Uncontrolled terms: Environmental conditions  -  Equipment design  -  Ethanol concentrations  -  Planar thermal source  -  Production equipments  -  Solid-state fermentation  -  Straw materials  -  Thermogravimetric test

Classification code: 716.1 Information Theory and Signal Processing

Information Theory and Signal Processing

  -  802.3 Chemical Operations

Chemical Operations

  -  804.1 Organic Compounds

Organic Compounds

DOI: 10.6041/j.issn.1000-1298.2018.05.039

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

20. Drying-Tempering Characteristics and Fissuring Law of Paddy Rice Kernel

Accession number: 20183705807496

Title of translation:

Authors: Wu, Zhonghua (1, 2); Liu, Bing (1); Wang, Dandan (1); Kang, Ning (1); Zhao, Lijuan (1, 2)

Author affiliation: (1) College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin; 300222, China; (2) International Joint Research Center of Low-Carbon Green Process Equipment, Tianjin; 300222, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 368-374

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The newly harvested paddy rice is easy to fissure during the hot air drying process. Tempering operation can effectively reduce the fissuring rate of dried rice. The acoustic emission (AE) method was applied for the first time to monitor the formation and development of micro-fissuring inside the rice kernel during the hot air drying process. The drying characteristics and fissuring rate of rice were investigated experimentally for the isothermal drying-tempering process, low temperature drying-high temperature tempering process respectively. Parametric studies were conducted by varying the tempering and drying temperature, tempering ratio (the ratio of the drying time to the tempering time of each section) and drying time of each section; and their effects on drying characteristics and fissuring rate of paddy rice were demonstrated. The possible reason for fissuring was discussed. Experimental results showed that there was always fissuring or development inside the rice kernel during the whole drying process. Tempering operation can decrease the drying time and fissuring rate of the dried paddy rice effectively. And 40 and 45 were the suitable hot air temperatures in the continuous constant temperature drying process. In the isothermal drying-tempering processing, the drying temperature can be increased to 50, and the fissuring rate was qualified. In low temperature drying-high temperature tempering process, the shortest drying time was achieved when the tempering temperature was 15 higher than the drying temperature, and the increased fissuring rate was still below 3%. The tempering time was reduced with the increase of the tempering temperature. These results provided a basis for developing an efficient drying process of paddy rice. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 26

Main heading: Drying

Controlled terms: Acoustic emission testing  -  Acoustic emissions  -  Grain (agricultural product)  -  Isotherms  -  Low temperature drying  -  Solar dryers  -  Temperature  -  Tempering  -  Welds

Uncontrolled terms: Constant temperature drying  -  Drying characteristics  -  Drying temperature  -  High-temperature tempering  -  Hot air temperature  -  Paddy rice  -  Tempering process  -  Tempering temperature

Classification code: 537.1 Heat Treatment Processes

Heat Treatment Processes

  -  538.2 Welding

Welding

  -  641.1 Thermodynamics

Thermodynamics

  -  751.2 Acoustic Properties of Materials

Acoustic Properties of Materials

  -  802.1 Chemical Plants and Equipment

Chemical Plants and Equipment

  -  802.3 Chemical Operations

Chemical Operations

  -  821.4 Agricultural Products

Agricultural Products

Numerical data indexing: Percentage 3.00e+00%

DOI: 10.6041/j.issn.1000-1298.2018.05.044

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

21. Collision Optimization and Experiment of Tomato Plug Seedling in Basket-type Transplanting Mechanism

Accession number: 20183705807468

Title of translation:

Authors: Liu, Yang (1, 2); Mao, Hanping (1, 3); Wang, Tao (2); Li, Bin (2); Li, Yaxiong (2)

Author affiliation: (1) Key Laboratory of Modern Agricultural Equipment and Technolog, Ministry of Education, Jiangsu University, Zhenjiang; 212013, China; (2) Mechanical Equipment Research Institute, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi; 832002, China; (3) High-tech Key Laboratory of Agricultural Equipment and Intelligentization of Jiangsu Province, Zhenjiang; 212013, China

Corresponding author: Mao, Hanping(maohp@ujs.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 143-151

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The basket-type transplanter has the characteristics of punching a hole in the mulch film and planting the seedling simultaneously, and has been applied in the transplanting process of tomato seedling in Northwest of China. Mass loss of root lump is caused by collision between tomato plug seedling and planting device when feeding device of basket-type transplanter feeds the seeding to planting device. For this problem, maximum contact force equation of root lump was got after contact mechanics model of planting device built by hertziantheory and kinetic energy theorem; differential equation of motion for tomato plug seedling was got after collision model among root lump, stem and planting device built by impulse and impulse moment theorem respectively; then an objective function was built by using goal planning method between contact mechanics equation and differential equation of motion, and 72° was the optimal value for seedling angle when the angular velocity of planting device was 1.18 rad/s and 1.31 rad/s by using the objective function. The height of tomato plug seedling was 12 cm after analyzing the relationship between collision point and drop angle of tomato plug seedling and movement velocity; it was benefit to reduce mass loss of root lump. The collision was elastic-plastic between root lump and planting device by using speed camera test to observe collision movement between tomato plug seedlings and planting device, the second collision of tomato plug seedling happened when root lump and stem collided with planting device, which meant theoretical research methods were reasonable. The root lump crushing test was carried out with the optimized operating parameters under the condition of angular velocity of planting device was 1.18 rad/s and 1.31 rad/s, test results showed that weight loss of tomato plug seedling was 9.67% and 8.43%, respectively, which was better than the test results of other combinations of parameters. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Seed

Controlled terms: Agricultural machinery  -  Angular velocity  -  Deformation  -  Elastoplasticity  -  Equations of motion  -  Fruits  -  Kinetic energy  -  Kinetics

Uncontrolled terms: Collision  -  Contact Mechanics  -  Objective functions  -  Operating parameters  -  Plug seedling  -  Theoretical research  -  Transplanting  -  Transplanting mechanisms

Classification code: 821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  821.4 Agricultural Products

Agricultural Products

  -  921.2 Calculus

Calculus

  -  931 Classical Physics; Quantum Theory; Relativity

Classical Physics; Quantum Theory; Relativity

Numerical data indexing: Angular_Velocity 1.18e+00rad/s, Angular_Velocity 1.31e+00rad/s, Percentage 8.43e+00%, Percentage 9.67e+00%, Size 1.20e-01m

DOI: 10.6041/j.issn.1000-1298.2018.05.016

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

22. Question Classification of Tomato Pests and Diseases Question Answering System Based on BIGRU

Accession number: 20183705807484

Title of translation: BIGRU

Authors: Zhao, Ming (1); Dong, Cuicui (1); Dong, Qiaoxue (1); Chen, Ying (1)

Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 271-276

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The notable feature of a question answering system is to understand the semantic information of the user’s question. Question classification, as the key module of question answering system, plays a decisive role in the efficiency of system retrieval. In order to classify the user’s questions, a classification model of tomato pests and diseases based on word2vec and bi-directional gated recurrent unit (BIGRU) was constructed. word2vec was used to transform the words in the sentence into the word vector with semantic information. The word vector was used as the initial corpus. Two neural network methods and a machine learning method were adopted to train the classification model. Totally 2000 tomato pests and diseases related questions were selected, which were divided into two categories: tomato diseases and tomato pests. The results showed that the classification accuracy, recall rate and F1 value by using the BIGRU model were 2~5 percentage points higher than those by using convolutional ceural network (CNN) and K-nearest neighbor (KNN) classification algorithm. Further experimental results comparison indicated that the BIGRU model performed the best on tomato pest and diseases question classification. The BIGRU model was simple in structure, less in model training parameters, and fast in training speed. It met the response time requirements of question answering system. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Fruits

Controlled terms: Artificial intelligence  -  Learning systems  -  Nearest neighbor search  -  Semantics

Uncontrolled terms: BIGRU  -  Classification accuracy  -  Classification algorithm  -  K nearest neighbor (KNN)  -  Machine learning methods  -  Question answering systems  -  Question classification  -  Tomato

Classification code: 723.4 Artificial Intelligence

Artificial Intelligence

  -  821.4 Agricultural Products

Agricultural Products

  -  921.5 Optimization Techniques

Optimization Techniques

DOI: 10.6041/j.issn.1000-1298.2018.05.032

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

23. Hyperspectral Inverse Model for Soil Salt Ions Based on Support Vector Machine

Accession number: 20183705807483

Title of translation:

Authors: Wang, Haijiang (1, 2); Jiang, Tianchi (1, 2); Yunger, John A (3); Li, Yali (4); Tian, Tian (1, 2); Wang, Jin’gang (1, 2)

Author affiliation: (1) The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi; 832000, China; (2) College of Agronomy, Shihezi University, Shihezi; 832000, China; (3) Department of Biology, Governors State University, Chicago; 60466, United States; (4) Research Institute of Soil, Fertilizer and Agricultural Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi; 830091, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 263-270

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The rapid, nondestructive and quantitative analysis of the composition and content of soil salt ions is an important basis for the treatment, improvement and utilization of salinized soil. Taking the saline soil of Xinjiang as the research object, the hyperspectral analysis technique was used to obtain the spectral characteristic of soil salt ions in different regions; compared the effect on the accuracy of the soil salt ions fitting model in different treatments which included fresh soil, air drying and oven-dry sample and different particle sizes (2 mm, 1 mm and 0.15 mm, respectively). After the transformation of spectral data, the spectral inversion models of main salt ions were established based on support vector machine (SVM), and the accuracy and universality of the model were tested. The results showed that there was no significant correlation between the original spectral characteristics and soil salt ions content, and the maximum correlation coefficient was Na+ (R=0.41). It was clear that the spectral data transformation can significantly enhance the correlation between the characteristic bands and the ions content, the optimal transformation forms of K+, Na+, Mg2+,Ca2+, SO42-, Cl- and HCO3- were (lgR)’, (lgR)’, R’, (lgR)’, CR, R’ and CR, respectively. The fitting models of T1 treatment cannot inverse the ions content very well, the accuracy of T3 model was better than that of T2, and the smaller the soil particle size was, the better the spectral inversion effect of soil ions content was. The prediction accuracy of the ions fitting model was the highest by T3 and over 0.15 mm sieves, the relative prediction deviation of K+, Na+, Ca2+ and SO42- were 2.153, 2.674 5, 2.051 and 2.786 4, respectively,the universality test of four ion models was carried out by using samples from Shihezi area other than modeling and validation, the R2 of test models were 0.621 4, 0.689 7, 0.614 4 and 0.650 7, respectively. The models were suitable for estimating the content of soil K+, Na+, Ca2+ and SO42- in Xinjiang area. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 34

Main heading: Soils

Controlled terms: Inverse problems  -  Ions  -  Metadata  -  Particle size  -  Particle size analysis  -  Support vector machines

Uncontrolled terms: Different particle sizes  -  HyperSpectral  -  Inverse modeling  -  Maximum correlation coefficient  -  Modeling and validation  -  Salt ions  -  Spectral characteristics  -  Xinjiang

Classification code: 483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  951 Materials Science

Materials Science

Numerical data indexing: Size 1.00e-03m, Size 1.50e-04m, Size 2.00e-03m

DOI: 10.6041/j.issn.1000-1298.2018.05.031

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

24. Analysis of Temporal-spatial Distribution and Influencing Factors of Water Footprint in Crop Production System of China

Accession number: 20183705807487

Title of translation:

Authors: Guo, Xiangping (1, 2); Gao, Shuang (1, 2); Wu, Mengyang (1, 2); Yu, Tao (1, 2); Cao, Xinchun (1, 2)

Author affiliation: (1) Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, Hohai University, Nanjing; 210098, China; (2) College of Agricultural Sciences and Engineering, Hohai University, Nanjing; 210098, China

Corresponding author: Cao, Xinchun(caoxinchun@hhu.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 295-302

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to evaluate the actual water resources consumption in agricultural production industry comprehensively, the crop water footprint (total water footprint of all kinds of crops, CWP) in 31. provinces of China during 1996-2015.was calculated. The influencing factors for time-dependent and spatial distribution of crop production water footprint (CPWF, CWP per unit cultivated land) were revealed by using the path analysis method. The results showed that the national average annual CWP was estimated to be approximately 1. 421.07.Gm3, and blue, green and gray water footprint accounted for 10.05%, 66.79% and 23.16%, respectively. The water footprint of grain and fruit crops accounted for more than 85% of the total, which decided the change trend of CWP in China. With a trend of decline after the slow rise, national CPWF in the studied period was 1. 156.90.mm. The spatial difference of CPWF was large, and it was decreased from southeast to northwest of China. Population density, per capita net income and fertilizer application were the main driving factors of time variation of CPWF, and rainfall, per capita GDP and per capita net income had important influence on the spatial distribution of CPWF. Economic development was the driving force to reduce the crop water footprint, which can promote the reduction of fertilizer application, the efficiency of irrigation water use and the ability to control green water resources. The following specific measures, including reducing the use of chemical fertilizers and pesticides and water resource consumption caused by water environment pollution, improving irrigation water use efficiency to save agricultural water resources, controlling high consumption in areas with serious exploitation of groundwater, expounding the proportion of effective irrigation area and improving the mechanization of the productive forces can be adopted to reduce the CWF. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 29

Main heading: Spatial distribution

Controlled terms: Chemical analysis  -  Crops  -  Cultivation  -  Economics  -  Efficiency  -  Factor analysis  -  Fertilizers  -  Groundwater  -  Groundwater pollution  -  Groundwater resources   -  Irrigation  -  Machinery  -  Population statistics  -  Rain  -  Regression analysis  -  Water management  -  Water supply

Uncontrolled terms: Agricultural productions  -  Agricultural water use  -  Irrigation water use efficiency  -  Path analysis  -  Temporal and spatial pattern  -  Temporal spatial distribution  -  Water environment pollution  -  Water footprint

Classification code: 443.3 Precipitation

Precipitation

  -  444.2 Groundwater

Groundwater

  -  446.1 Water Supply Systems

Water Supply Systems

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821.3 Agricultural Methods

Agricultural Methods

  -  821.4 Agricultural Products

Agricultural Products

  -  913.1 Production Engineering

Production Engineering

  -  921 Mathematics

Mathematics

  -  922.2 Mathematical Statistics

Mathematical Statistics

  -  971 Social Sciences

Social Sciences

Numerical data indexing: Percentage 1.01e+01%, Percentage 2.32e+01%, Percentage 6.68e+01%, Percentage 8.50e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.035

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

25. Design and Experiment of Inclined Parabolic Cell Wheel in Seed Feeding Device for Wheat

Accession number: 20183705807465

Title of translation:

Authors: Li, Zhaodong (1, 2); Wang, Qingqing (1); Zhang, Yalan (1); Wang, Weiwei (1); Yang, Yang (1, 2); Chen, Liqing (1, 2)

Author affiliation: (1) School of Engineering, Anhui Agricultural University, Hefei; 230036, China; (2) Laboratory of Engineering of Intelligent Agricultural Machinery Equipment of Anhui Province, Hefei; 230036, China

Corresponding author: Chen, Liqing(lqchen@ahau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 116-124

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to solve the difficulty of high speed and precision control of wheat in corn straw covered ground of Huaibei Plain and simplify the existing wheat seed supplying pneumatic type mechanism, a inclined parabolic cell wheel seed feeding device for wheat was designed. The structure and working principle of wheat precision seed device was described, the relevant parameters were analyzed and determined, the curve limit equation of cell and the mechanical model of wheat seed supplying process was established, and then taking the cone angle, speed of cell and wheel number as test factors, seed feeding rate, stability coefficient of variation of seed feeding and damage rate were taken as test indexes and a performance experiment was carried out. Experimental results showed that parabolic cell with a dip angle of 40° had better stability, whose stability coefficient of variation of seed supplying was less than 1.8% and damage rate was below 0.2%; under the condition that the amount of cell wheel was 1~5 and working speed was 10~100 r/min, wheat seed feeding rate, which was ranged from 35 g/min to 1 500 g/min, was rising as the number and speed of cell wheel was increased; stability coefficient of variation of seed feeding, which was less than 2.0%, was decreased as cell wheel number was increased, and it was decreased first and then raised as cell wheel speed was increased; according to the variable feeding matching experiment with the mathematical model of sowing amount per hectare, which was established by seed feeding device for wheat with the installment of 5 cell wheel, a large range of variable supplying, whose stability coefficient of variation of seed supplying was less than 2%, was achieved when simulation advancing velocity of the equipment was less than 9.8 km/h. The field experiment showed that the planting density of direct seeding wheat was 230~270 strain per square, and homogeneity coefficient of variation of seed supplying was 21.97%. Inclined parabola cell wheel proposed can realize a wide range of wheat seed supplying and simplify the structure of seed supplying device, in order to design a high performance wheat variable seed sowing machine for corn straw mulch in Huaibei Plain and provide the basis. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Seed

Controlled terms: Cells  -  Cytology  -  Feeding  -  Speed  -  Stability  -  Structural design  -  Wheels

Uncontrolled terms: Feeding devices  -  Field experiment  -  Homogeneity coefficient  -  Metering devices  -  Performance experiment  -  Precision control  -  Stability coefficient  -  Wheat

Classification code: 408.1 Structural Design, General

Structural Design, General

  -  461.2 Biological Materials and Tissue Engineering

Biological Materials and Tissue Engineering

  -  601.2 Machine Components

Machine Components

  -  691.2 Materials Handling Methods

Materials Handling Methods

  -  821.4 Agricultural Products

Agricultural Products

Numerical data indexing: Mass_Flow_Rate 5.83e-04kg/s to 2.50e-02kg/s, Percentage 1.80e+00%, Percentage 2.00e+00%, Percentage 2.20e+01%, Rotational_Speed 1.00e+01RPM to 1.00e+02RPM, Velocity 2.72e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.05.013

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

26. Inversion of Soil Moisture Content from Hyperspectra Based on Ridge Regression

Accession number: 20183705807480

Title of translation:

Authors: Zhang, Zhitao (1, 2); Wang, Haifeng (1, 2); Karnieli, Arnon (3); Chen, Junying (1, 2); Han, Wenting (2)

Author affiliation: (1) College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling; Shanxi; 712100, China; (2) Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling; Shanxi; 712100, China; (3) Jocob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Sede Boker; 84990, Israel

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 240-248

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Obtaining soil moisture quickly and timely can grasp the needs of water of the crops, which is very important for the agricultural production. Soil spectral reflectance provides an alternative method to classical physical and chemical analysis of soil in laboratory for the estimation of a large range of key soil properties. Therefore, the soil moisture was quickly achieved by using hyperspectral technology and the application of ridge regression was explored in the optimization and quantitative analysis of hyperspectral bands. Totally 91 soil samples were collected from the soil depth of 0~5 cm in Seder Boker area in the southern Israeli. These soil samples were analyzed in the process of physical and chemical properties in laboratory. After that, the raw hyperspectral reflectance of soil samples was measured by an ASD FieldSpec 3 instrument equipped with a high intensity contact probe under the darkroom conditions. Next, the raw spectral reflectance (REF) was transformed to three spectral indices, i.e. inverse-log reflectance (LR), the first order differential reflectance (FDR) and continuum removal reflectance (CR). Regression models of soil moisture with different indices were established by three methods: partial least squares regression (PLSR), stepwise regression (SR) and ridge regression (RR). The inversion results of the model were validated and compared with each other. The results showed that the method of LR transform can eliminate the interference of external factors much better, and it appeared to be the optimal spectral index in stepwise regression model and ridge regression model (Rc2 were 0.981 and 0.975, and Rp2 were 0.971 and 0.979). For the three spectral indices about REF, FDR and CR, although the modeling effect of SR and RR was slightly lower than that of PLSR, the coefficient of modeling determination was above 0.9. Both SR and RR had simplified and optimized the model, but RR had better validation results and the number of bands used for modeling was only 0.3% of the full spectrum (400~2 400 nm). After comparing the three regression models established with the four spectral indices, the LR-RR model not only had the characteristics of simple model and less calculation, but also improved the robustness of the model better by using biased estimation at the cost of losing the part accuracy. The result indicated that ridge regression method can not only achieve the efficient selection of hyperspectral bands, but also use the LR-RR hyperspectral inversion model for the reference of monitoring the aerospace hyperspectral remote sensing of regional soil moisture in the future. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 34

Main heading: Regression analysis

Controlled terms: Agriculture  -  Chemical analysis  -  Inverse problems  -  Least squares approximations  -  Moisture determination  -  Optical waveguides  -  Reflection  -  Remote sensing  -  Soil moisture  -  Soil surveys

Uncontrolled terms: Band selection  -  Hyperspectral reflectance  -  Hyperspectral remote sensing  -  Partial least squares regressions (PLSR)  -  Physical and chemical analysis  -  Physical and chemical properties  -  Ridge regression  -  Soil spectral reflectance

Classification code: 483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  714.3 Waveguides

Waveguides

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  921.6 Numerical Methods

Numerical Methods

  -  922.2 Mathematical Statistics

Mathematical Statistics

  -  944.2 Moisture Measurements

Moisture Measurements

Numerical data indexing: Percentage 3.00e-01%, Size 0.00e+00m to 5.00e-02m, Size 4.00e-07m to 2.40e-06m

DOI: 10.6041/j.issn.1000-1298.2018.05.028

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

27. Design and Seed-filling Test of Cell-type Precision Seed-metering Device with Vibration Technology

Accession number: 20183705807464

Title of translation:

Authors: Liu, Cailing (1); Wang, Chao (1); Song, Jiannong (1); Du, Xin (1); Zhang, Fuyin (1)

Author affiliation: (1) Key Laboratory of Soil-Machine-Plant System Technology, Ministry of Agriculture, China Agricultural University, Beijing; 100083, China

Corresponding author: Song, Jiannong(songjn@cau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 108-115

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: A directional seed-feeding mechanism combined with cell-type seed-metering device was developed to meet the precision planting requirement for low sowing quantity for non-round seed. The working principle of directional seed-feeding mechanism was analyzed. The motion model of a seed in the directional seed-feeding mechanism and dynamic model of a seed filling into a cell was established and the parameter design of the key structure was completed. The quadratic regression rotational orthogonal experiments were carried out with the installation angle of V-groove, vibration direction angle, vibration frequency, voltage (amplitude) and the rotational speed of seeding wheel, and multiple regression analysis and response surface analysis of experimental data were carried out by using Design-Expert 8.0.6 software. The regression model between the factors and qualified rate was established and the influences of factors on indexes were analyzed. The influence relation of factors on the qualified rate was determined and the order of importance was vibration frequency, amplitude, vibration direction angle, installation angle and wheel speed in turn. Based on the regression model, the parameters were optimized and the experimental verification was worked out. Results showed that the optimal parameter combination of installation angle, vibration direction angle, vibration frequency, amplitude and wheel speed was 4.02°, 31.29°, 35.9 Hz, 4.03 V and 5.55 r/min, respectively, and the qualified rate and the leakage rate of experimental verification was 97.64% and 2.36%, respectively. There were no more than three grains per cell. The device can meet the requirements of precision seeding for low sowing quantity. It was feasible that cell-type seed-metering device combined with the directional seed-feeding mechanism realized precision seed-metering of non-round seed. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Vibration analysis

Controlled terms: Cells  -  Cytology  -  Feeding  -  Pneumatic materials handling equipment  -  Regression analysis  -  Seed  -  Surface analysis  -  Wheels

Uncontrolled terms: Experimental verification  -  Multiple regression analysis  -  Non-circular  -  Optimal parameter combinations  -  Precision seed-metering devices  -  Response surface analysis  -  Seed metering  -  Vibration-type

Classification code: 461.2 Biological Materials and Tissue Engineering

Biological Materials and Tissue Engineering

  -  601.2 Machine Components

Machine Components

  -  691.1 Materials Handling Equipment

Materials Handling Equipment

  -  691.2 Materials Handling Methods

Materials Handling Methods

  -  821.4 Agricultural Products

Agricultural Products

  -  922.2 Mathematical Statistics

Mathematical Statistics

  -  951 Materials Science

Materials Science

Numerical data indexing: Frequency 3.59e+01Hz, Percentage 2.36e+00%, Percentage 9.76e+01%, Rotational_Speed 5.55e+00RPM, Voltage 4.03e+00V

DOI: 10.6041/j.issn.1000-1298.2018.05.012

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

28. Numerical Investigation on Effects of Biochar on Hydraulic Characteristics of Northeast Meadow Black Soil

Accession number: 20183705807485

Title of translation:

Authors: Wang, Ruiyin (1, 2); Wei, Yongxia (2, 3); Zhang, Yipeng (2); Zhang, Yufeng (2); Ma, Decai (4)

Author affiliation: (1) School of Science, Northeast Agricultural University, Harbin; 150030, China; (2) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (3) Key Laboratory of High Efficiency Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China; (4) Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai; 519082, China

Corresponding author: Wei, Yongxia(wyx0915@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 277-286

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to study the effect of biochar on the hydraulic characteristics of northeast meadow black soil, establish the model suitable for the soil with addition of biochar, and the ratio (0, 2%, 4%, 6% and 8%) biochar was applied to soil, and the soil hydraulic parameters were tested and numerically analyzed. The results showed that the increase of soil water holding capacity was due to the high ability of water holding capacity of biochar greater than 2.200.cm suction range, and the improvement of hydraulic conductivity was due to the hydraulic conductivity of biochar at low suction range that lower than 35.82.cm. Compared saturated hydraulic conductivity test data with theoretical estimate value, it was showed that the actual measurement values were closed to layered distribution, the max difference was about 8.9%, added biochar soil should be considered as layered distribution. The difference between experimental data and theoretical values was due to the increase of gap in soil by biochar. The water distribution of the soil after infiltrated 24.h was simulated by capillary model. The saturation of simulation was 11% lower than actual measured value, which showed that the unsaturated hydraulic conductivity of soil with addition of biochar was fit in capillary model. According to the results of capillary model, the hydraulic conductivity of soil that added biochar was mainly due to the characteristics of biochar, it mainly changed the hydraulic conductivity of soil under low suction. The results showed that application of biochar can improve the hydraulic conductivity of northeast meadow black soil of China, the higher content of biochar added was, the higher hydraulic conductivity was increased. The results also showed that the number of different aperture of capillary was not evenly distributed in biochar, the smaller the aperture was, the more number of capillary was. The capillary model was simple and effective, when the volume ratio of biochar in soil was less than 8%, the numerical analysis results were in good agreement with those obtained with the test data of soil, and it was showed that the model can provide accurate method for numerical calculation. The results can provide a method and guarantee for the study of soil hydrodynamic characteristics under certain biochar application, different areas, different terrains and different permeation times. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 26

Main heading: Hydraulic conductivity

Controlled terms: Buoyancy  -  Finite element method  -  Numerical methods  -  Soil moisture  -  Water supply systems

Uncontrolled terms: Bio chars  -  Black soil  -  Capillary model  -  Effective saturation  -  Unsaturated hydraulic conductivity

Classification code: 446.1 Water Supply Systems

Water Supply Systems

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  632.1 Hydraulics

Hydraulics

  -  921.6 Numerical Methods

Numerical Methods

  -  931.2 Physical Properties of Gases, Liquids and Solids

Physical Properties of Gases, Liquids and Solids

Numerical data indexing: Percentage 1.10e+01%, Percentage 2.00e+00%, Percentage 4.00e+00%, Percentage 6.00e+00%, Percentage 8.00e+00%, Percentage 8.90e+00%

DOI: 10.6041/j.issn.1000-1298.2018.05.033

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

29. Improved Pure Pursuit Algorithm for Rice Transplanter Path Tracking

Accession number: 20183705807454

Title of translation:

Authors: Li, Ge (1); Wang, Yu (1); Guo, Liufen (1); Tong, Junhua (1, 2); He, Yong (3)

Author affiliation: (1) Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou; 310018, China; (2) Zhejiang Provincial Key Laboratory of Transplanting Equipment and Technology, Hangzhou; 310018, China; (3) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou; 310058, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 21-26

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: There are a lot of algorithms on the pure pursuit model, but most of them focus on the linear path tracking. Due to the path of the transplanter including straight line and curve turning segment, it is necessary to improve the traditional pure tracking algorithm. Taking John Deere Starfire3000 receiver, GS2630 display and ATU200 as the main hardware equipments, according to the curve of a given path, a path tracking control algorithm was proposed, combining the model simulation and field test, the navigation control algorithm was verified. The specific steps of the navigation control algorithm were as follows: firstly, according to the vehicle speed and the bending degree of the road, the lookahead distance was adjusted dynamically. Secondly, on the basis of using the preview control to get the vehicle target, controller was designed based on improved pure tracking algorithm. At last, the simulation and experiment were carried out according to the path of transplanter. The results showed that the maximum error could be controlled within 0.159 m when the vehicle was traveling at the speed of 1 m/s and the turning radius was 0.9 m. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Agricultural machinery

Controlled terms: Tracking (position)  -  Vehicles

Uncontrolled terms: Lookahead distance  -  Model simulation  -  Navigation controls  -  Path tracking  -  Path tracking control  -  Pure-pursuit algorithms  -  Rice transplanter  -  Tracking algorithm

Classification code: 821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

Numerical data indexing: Size 1.59e-01m, Size 9.00e-01m, Velocity 1.00e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.05.002

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

30. Estimation of Upper and Lower Canopy Volume Ratio of Fruit Trees Based on M-K Clustering

Accession number: 20183705807459

Title of translation: M-K

Authors: Qi, Lijun (1); Cheng, Yifan (1); Cheng, Zhenzhen (1); Yang, Zhilun (1); Wu, Yalei (1); Ge, Luzhen (1)

Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 57-64

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The volume of tree canopy provides theoretical basis for the orchard spray, and the application of airborne laser scanning is widely used in canopy volume measurement, but there is a problem of lack of canopy information. To solve this problem and improve the accuracy of tree canopy volume measurement, a method based on image processing to measure the tree upper and lower canopy volume ratio was proposed. A new M-K clustering method combining Mahalanobis distance and K-means algorithm was created to split the image target area and find the ratio of the volume of pixels in the upper and lower canopy by rotation integration method. The further research reduced the error (nearly 25.3%) measurement of unilateral canopy image processing on this basis. According to the estimation results of multiple images of different sides of the fruit tree by arithmetic mean method, M-K clustering method was modified, which became more accurate and stable. Totally 23 apple trees and 20 cherry trees were experimented in the orchard, and the results were compared with the artificial measurement results, which showed that the M-K clustering method was in good agreement with artificial measurement results with Rapple2 of 0.775 and Rcherry2 of 0.832. It can be used for the measurement of canopy volume ratio. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Volume measurement

Controlled terms: Cluster analysis  -  Fruits  -  Image enhancement  -  Image processing  -  Orchards  -  Titration

Uncontrolled terms: Airborne Laser scanning  -  Arithmetic mean method  -  Clustering methods  -  Estimation results  -  Integration method  -  k-Means algorithm  -  Mahalanobis distances  -  Volume ratio

Classification code: 723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  801 Chemistry

Chemistry

  -  821.3 Agricultural Methods

Agricultural Methods

  -  821.4 Agricultural Products

Agricultural Products

  -  943.2 Mechanical Variables Measurements

Mechanical Variables Measurements

Numerical data indexing: Percentage 2.53e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.007

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

31. Research Progress of Rice Transplanting Mechanization

Accession number: 20183705807453

Title of translation:

Authors: Li, Zehua (1); Ma, Xu (2); Li, Xiuhao (1); Chen, Lintao (2); Li, Hongwei (2); Yuan, Zhicheng (2)

Author affiliation: (1) College of Mathematic and Information, South China Agricultural University, Guangzhou; 510642, China; (2) College of Engineering, South China Agricultural University, Guangzhou; 510642, China

Corresponding author: Ma, Xu(maxu1959@scau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 1-20

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Rice transplanting mechanization is a key and critical technology in rice full-mechanized production, which has become the main development direction of rice production in China. The development status, characteristics and constraints of rice transplanting mechanization in our country were analyzed, especially the research status and development trend of technology and equipment in rice mechanized transplanting and seedling nursing were expounded. Seedling nursing in tray is the precondition for realizing rice mechanized transplanting. The research progress of precision seeding technology, operation automation technology and precision seeding intelligentization technology of seedling nursing in trays is emphatically analyzed. Rice transplanting mechanical control technology is the foundation and core of automation and intelligentization operation in transplanting machines, which mainly includes two ways of rice transplanting mechanization as blanket-shaped seedling and potted seedling mechanical transplanting. Based on the analysis of rice mechanization transplanting method and equipment in China, the main problems on those two kinds of seedlings transplanting technology were systematically analyzed and summarized, the research status of control technology of transplanting machine was discussed. It even put forward to strengthen the research and application of tillage mechanization technology, solve the difficult problem about hybrid rice and super hybrid rice mechanical transplanting, solve the problem about double season late rice and continuous cropping late rice mechanical transplanting, which is a research emphasis on rice transplanting mechanization technology. Improving sowing uniformity of precision seeding of seedling nursing technology, solving the blanket-shaped seedling precision of longitudinal amount of transplanting seedling and the depth of integration among agricultural and agronomic is a difficult problem for breaking through the key technology of rice transplanting mechanization. Inventing an economical and efficient potted seedling transplanting machinery is the core of developing potting seedling mechanical transplanting technology. Strengthening the transplanting mechanical control technology is the further development direction of transplanting mechanization. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 128

Main heading: Mechanization

Controlled terms: Agricultural machinery  -  Agriculture  -  Nursing  -  Problem solving

Uncontrolled terms: Automation technology  -  Development directions  -  Research and application  -  Rice  -  Seedling transplanting  -  Seedlings transplanting  -  Technology and equipments  -  Transplanting

Classification code: 461.7 Health Care

Health Care

  -  601 Mechanical Design

Mechanical Design

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

DOI: 10.6041/j.issn.1000-1298.2018.05.001

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

32. Transient Characteristics Analysis of Free-surface and Submerged Vortices in Pump Sump Based on LES

Accession number: 20183705807473

Title of translation: LES

Authors: Pan, Qiang (1); Shi, Weidong (1, 2); Zhao, Ruijie (1); Zhang, Desheng (1)

Author affiliation: (1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang; 212013, China; (2) School of Mechanical Engineering, Nantong University, Nantong; 226019, China

Corresponding author: Shi, Weidong(wdshi@ujs.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 186-194

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The hydraulic performance of water intake system is strongly influenced by the geometry of the pump intake and the approaching flow conditions. Undesirable vortices and the suction of air will be induced if a poor design of the system is made. An open pump intake was referred so that both the free-surface and sub-surface vortices could be taken into account under the influence of the geometry and neighboring flows. Large eddy simulation (LES) was employed to simulate the flow and the associated vortices in the pump intake and the fluctuation of free surface was resolved by means of volume of fluid model (VOF). The verification and validation of the simulated results were systematically performed. On the one hand, the mesh size near the wall was checked with y+ and the LES index of quality (LES_IQ) was calculated which demonstrated the percentage of directly resolved turbulent kinetic energy in LES by using two sets of meshes with different grid quantities. On the other hand, the numerical results were compared with the well-known published experiments with respect to the transient flow feature and time-averaged vorticity profile, where the disparities were also analyzed. Compared with most Reynolds averaged Navier-Stokes (RANS) based simulations, LES showed a better prediction for all kinds of vortices on location, shape, size of vortex core, velocity, as well as the turbulence kinetic energy inside vortex core. Based on the numerical results, time-averaged behavior of three typical vortices showed better similarities with reality that there was always a core region surrounding the axis where the azimuthal velocity stopped increasing and decreased to zero as radius went to zero. Besides, iso-surface of λ2 was adopted to visualize the vortices at different times, showing the main vortex and spirally rounding vortical structures. Transient behaviors of free surface and submerged vortices were analyzed, and the effects of advection and stretching/tilting termed on the vorticity variation were discussed via vorticity transport equation. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Vortex flow

Controlled terms: Kinetic energy  -  Kinetics  -  Large eddy simulation  -  Navier Stokes equations  -  Sump pumps  -  Transient analysis  -  Vorticity

Uncontrolled terms: Free-surface vortices  -  Pump sump  -  Submerged vortices  -  Transient behavior  -  Volume of fluid model

Classification code: 618.2 Pumps

Pumps

  -  631 Fluid Flow

Fluid Flow

  -  631.1 Fluid Flow, General

Fluid Flow, General

  -  921 Mathematics

Mathematics

  -  921.2 Calculus

Calculus

DOI: 10.6041/j.issn.1000-1298.2018.05.021

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

33. Effect of Planting Density of Sorghum as Green Manure on Root Growth Factors of Facilities Cucumber

Accession number: 20183705807490

Title of translation:

Authors: Liu, Jinquan (1); Li, Ming (1); Hu, Yun (1); Li, Fahu (1); Zhang, Qingmei (1); Wang, Xueyu (1)

Author affiliation: (1) Vocational and Technical College, Inner Mongolia Agricultural University, Baotou; 014109, China

Corresponding author: Li, Ming(liming19750811@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 323-329

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The cucumber of solar greenhouse was used to study the effect of sorghum green manure on cucumber growth, nutrient content and bacterial community of rhizosphere soil. In the test, treatments were amount of 240.kg/hm2, 120.kg/hm2 and 60.kg/hm2 of sorghum seeds which were respectively planted into the soil of greenhouse before planting cucumber. When the cucumber was planted, the green manure was cut into the soil to study on the change rule of cucumber growth, nutrient content, bacterial community of rhizosphere soil, and the regulated mechanism between these factors under the condition of sorghum green manure. The study showed that the effect of 240.kg/hm2 of sorghum green manure was better than those of other treatments, which significantly and respectively improved organic matter content by 31.66%, resolution N content by 8.75%, available P content by 13.89%, available K content by 16.86% and urease activity by 6.85% of rhizosphere soil, and increased stem diameter by 12.83%, root number by 15.81%, total root volume by 24.11%, total leaf area by 11.43%, fruit number per plant by 10.97% and total yield by 9.81% of cucumber. The study also showed that the treatment of 240.kg/hm2 increased the proportions of Proteobacteria, Actinobacteria and Firmicutes, but reduced the proportions of Acidobacteria and Chloroflexi, and improved the proportions of Sphingomonadaceae, Xan-thomonadaceae, Rhodospirillaceae, Sinobacteraceae and Hyphomicrobiaceae, but decreased the proportions of Gp6, Gp16.and Gp4. The treatment of 240.kg/hm2 promoted urease activity by decreasing the proportion of Chloroflexi and improving the proportions of Sphingomonadaceae and Sinobacteraceae of rhizosphere soil, and the treatment increased content of resolution N and available P, stem diameter, total leaf area, root coefficient and total root volume by improving the proportions of Firmicutes, Xanthomonadaceae and Rhodospirillaceae and decreasing the proportion of Acidobacteria. The cucumber growth and yield were promoted ultimately through these ways as above. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Manures

Controlled terms: Bacteria  -  Fertilizers  -  Forestry  -  Greenhouse effect  -  Greenhouses  -  Nutrients  -  Seed  -  Soils

Uncontrolled terms: Bacterial community  -  Green manures  -  Planting density  -  Rhizosphere soils  -  Root growth

Classification code: 451 Air Pollution

Air Pollution

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

Numerical data indexing: Percentage 1.10e+01%, Percentage 1.14e+01%, Percentage 1.28e+01%, Percentage 1.39e+01%, Percentage 1.58e+01%, Percentage 1.69e+01%, Percentage 2.41e+01%, Percentage 3.17e+01%, Percentage 6.85e+00%, Percentage 8.75e+00%, Percentage 9.81e+00%

DOI: 10.6041/j.issn.1000-1298.2018.05.038

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

34. Internal Quality Detection of Apples during Late Developmental Period Based on Near-infrared Spectral Technology

Accession number: 20183705807493

Title of translation:

Authors: Wang, Zhuanwei (1, 2); Chi, Qian (1, 2); Guo, Wenchuan (1, 2); Zhao, Chunjiang (3)

Author affiliation: (1) College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling; Shanxi; 712100, China; (2) Key Laboratory of Agricultural Internet of Things, Ministry of Agriculture, Yangling; Shanxi; 712100, China; (3) National Engineering Research Center for Information Technology in Agriculture, Beijing; 100097, China

Corresponding author: Zhao, Chunjiang(zhaocj@nercita.org.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 348-354

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: With the aim to understand the relationship between internal properties and near-infrared (NIR) characteristics of apples during late developmental period, and provide a basis for field management and harvest in time, NIR diffuse reflection technology was used to measure the absorbance of ‘Fuji’ apples over the wavelength range of 833~2.500.nm during the last three months of fruits’ late developmental period. Then, the internal qualities (soluble solids content (SSC), firmness (F), pH value and moisture content (MC)) of apples were measured. The linear correlations between each internal quality and the light absorption intensity at a single wavelength were analyzed. The results showed that there were weak linear correlations between the internal quality and the light absorption intensity at a single wavelength. It was difficult to predict the internal qualities of apples based on the intensity of light absorption at a given wavelength. Therefore, combined with chemometrics, the least squares support vector machine and extreme learning machine (ELM) models were established for predicting SSC, F, pH value and MC, and the effect of three data reduction methods (principal component analysis (PCA), successive projection algorithm (SPA) and uninformative variable elimination (UVE)) on the prediction performance of models was analyzed. Modeling results revealed that the optimal models for predicting SSC and pH value were SPA-ELM, whose RMSEP was 0.443.5°Brix and 0.006.8, respectively; the optimal models for F and MC were PCA-ELM, whose RMSEP was 0.261. 2.kg/cm2 and 0.623.5%, respectively. Comparing three kinds of data reduction methods, SPA had better data reduction effect than those of PCA and UVE, which not only could make the model have better prediction performance and robustness, but also have obvious data reduction effect. The number of characteristic wavelength extracted by SPA was only 0.29%~0.53% of the original data. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 26

Main heading: Data reduction

Controlled terms: Forecasting  -  Fruits  -  Infrared devices  -  Learning systems  -  Least squares approximations  -  Light absorption  -  pH  -  Principal component analysis

Uncontrolled terms: Apples  -  Extreme learning machine  -  Internal quality  -  Late developmental period  -  Least squares support vector machines  -  Near infrared spectral  -  Successive projection algorithms  -  Uninformative variable eliminations

Classification code: 723.2 Data Processing and Image Processing

Data Processing and Image Processing

  -  741.1 Light/Optics

Light/Optics

  -  801.1 Chemistry, General

Chemistry, General

  -  821.4 Agricultural Products

Agricultural Products

  -  921.6 Numerical Methods

Numerical Methods

  -  922.2 Mathematical Statistics

Mathematical Statistics

DOI: 10.6041/j.issn.1000-1298.2018.05.041

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

35. Experiment on Fluid Force Induced Vibration for Centrifugal Pumps

Accession number: 20183705807472

Title of translation:

Authors: Tan, Linwei (1); Shi, Weidong (1, 2); Zhang, Desheng (1); Zhou, Ling (1); Wang, Chuan (1)

Author affiliation: (1) Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang; 212013, China; (2) School of Mechanical Engineering, Nantong University, Nantong; 226019, China

Corresponding author: Shi, Weidong(wdshi@ujs.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 179-185

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The trend toward large and high speed centrifugal pump brings a great challenge for the safe and stable operation of centrifugal pumps. And fluid force induced vibration of centrifugal pumps is increased significantly. In order to reveal the fluid force induced vibration characteristic of centrifugal pumps, a single-blade centrifugal pump was used as the test pump. Based on the pump performance experiment, two vertically arranged eddy current displacement sensors were used to measure the transient displacement of impeller wear ring when pumping air and water. Time history and frequency spectrum of the displacement of the wear ring and locus of the wear ring displacement were obtained. Fluid force induced vibration characteristics of the centrifugal pump at different flow rates were obtained by using Huake hydraulic machinery tester based on the key phase information of the Hall sensor. The experimental results showed that the time history and frequency spectrum of the displacement of centrifugal pump were similar in both pumping air and water. Waveforms were periodically repeated distortion sinusoids and the dominant frequency was the rotational frequency of impeller. Locus of the wear ring displacement was distorted oval, and there was a mutation when pumping water. Fluid force induced locus of the wear ring displacement under different flow conditions were also distorted oval. And there was a mutation between 210° and 300°, the maximum appeared at around 130°. Fluid force induced vibration was significantly increased at the small flow rates, corresponding to the pump efficiency was significantly reduced, and it became weak at the design flow rate and large flow rates, corresponding to the higher efficiency of the pump. The research result provided a reference for the stable operation of centrifugal pumps and on-line fault diagnosis. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Centrifugal pumps

Controlled terms: Eddy current testing  -  Efficiency  -  Experiments  -  Fault detection  -  Flow rate  -  Hall effect transducers  -  Hydraulic machinery  -  Impellers  -  Spectroscopy  -  Vibration analysis   -  Wear of materials

Uncontrolled terms: Dominant frequency  -  Eddy current displacement sensors  -  Frequency spectra  -  Higher efficiency  -  Induced vibrations  -  On-line fault diagnosis  -  Phase information  -  Rotational frequency

Classification code: 601.2 Machine Components

Machine Components

  -  618.2 Pumps

Pumps

  -  631 Fluid Flow

Fluid Flow

  -  632.2 Hydraulic Equipment and Machinery

Hydraulic Equipment and Machinery

  -  901.3 Engineering Research

Engineering Research

  -  913.1 Production Engineering

Production Engineering

  -  951 Materials Science

Materials Science

DOI: 10.6041/j.issn.1000-1298.2018.05.020

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

36. Automatic Identification Method for Sogatella furcifera Based on Convolutional Neural Network

Accession number: 20183705807458

Title of translation:

Authors: Liu, Deying (1); Wang, Jialiang (1); Lin, Xiangze (1); Chen, Jing (1); Yu, Haiming (1)

Author affiliation: (1) College of Engineering, Nanjing Agricultural University, Nanjing; 210031, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 51-56

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to realize the pest information automatic collection and monitoring for Sogatella furcifera, an automatic recognition method based on convolutional neural network was presented and its application was carried out. The images of Sogatella furcifera were collected in the natural state of the field by using the improved automatic acquisition system for insect images in field environment and the acquired images were normalized. Six hundred of images were randomly selected from the normalized images as training set and three hundred ones were chosen as test set. The convolution operation was performed on the training set with 5×5 convolution kernel and the acquired feature graphs were pooled in a 2×2 neighborhood. After the convolution operation and 3×3 neighborhood pooling operation, the network model parameters were obtained by using automatic learning and the optimal network identification model for Sogatella furcifera was achieved. The experimental results showed that the recognition accuracy for Sogatella furcifera could reach 96.17% for training set, and for test set, the recognition accuracy was 94.14%. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Image enhancement

Controlled terms: Automation  -  Convolution  -  Distributed computer systems  -  Identification (control systems)  -  Image acquisition  -  Neural networks

Uncontrolled terms: Automatic acquisition  -  Automatic identification  -  Automatic recognition method  -  Convolutional neural network  -  Identification model  -  Network model parameters  -  Recognition accuracy  -  Sogatella furcifera

Classification code: 716.1 Information Theory and Signal Processing

Information Theory and Signal Processing

  -  722.4 Digital Computers and Systems

Digital Computers and Systems

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  731 Automatic Control Principles and Applications

Automatic Control Principles and Applications

  -  731.1 Control Systems

Control Systems

Numerical data indexing: Percentage 9.41e+01%, Percentage 9.62e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.006

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

37. Effect of Different Water and Nitrogen Managements on Rice Leaf Water Use Efficiency Based on Δ13C

Accession number: 20183705807488

Title of translation: Δ13C

Authors: Zhang, Zhongxue (1, 2); Chen, Peng (1, 2); Zheng, Ennan (1, 2); Nie, Tangzhe (1, 2); Chen, Shuaihong (1, 2); Li, Weitong (3)

Author affiliation: (1) College of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China; (3) School of Resource and Environment, Northeast Agricultural University, Harbin; 150030, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 303-312

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to further investigate the high water use efficiency mechanism under different water and nitrogen managements, theoretical analysis was combined with field experiments, and water use efficiency research on leaf scales was integrated through carbon isotope’s instruction on water use efficiency based on carbon isotopic factor effect during crop growth and development. The effects of different water and nitrogen managements on gas exchange parameters, instantaneous water use efficiency (WUEins), intrinsic water use efficiency (WUEint) and carbon isotope discrimination (Δ13C) were examined, and then the relationship between Δ13C in rice leaf with WUEins and WUEint at leaf scale was analyzed to further explain the water use process in crop leaf under different water and nitrogen managements. The result showed that the appropriate amount of nitrogen fertilizer could increase the stomatal conductance (Gs) of leaves of rice, promote the exchange of leaf cells with outside world, increase the net photosynthetic rate (Pn), and maintain high WUEint and WUEins under controlled irrigation. Excessive application of nitrogen would increase the sensitivity of rice to water deficit, so that Gs of rice leaves was reduced, which was not conducive to the efficient use of water at leaf scale. The leaf water use efficiency and yield were the highest when the nitrogen application rate was high at the heading stage, and WUEint, WUEins and WUEET of the same nitrogen treatment of controlled irrigation for rice were higher than those of flood irrigation, which played water saving and high yield effect. The statistical analysis result indicated that leaf Δ13C showed a negative relationship with WUEint,WUEins and WUEET respectively at heading stage under different water and nitrogen managements. Leaf Δ13C showed a better indicating capacity on WUEint than that on WUEins. Furthermore, the correlation between leaf Δ13C and WUEins, WUEint under controlled irrigation was more significant than that under flooding irrigation; the leaf Δ13C values can well characterize rice WUEET during the period of booting and heading. In conclusion, using rice leaf Δ13C values to indicate water use efficiency at leaf levels had a certain feasibility under different water and nitrogen managements. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 29

Main heading: Nitrogen fertilizers

Controlled terms: Carbon  -  Crops  -  Efficiency  -  Floods  -  Irrigation  -  Isotopes  -  Water conservation  -  Water resources

Uncontrolled terms: Carbon isotope discrimination  -  Crop growth and development  -  Intrinsic water-use efficiencies  -  Net photosynthetic rate  -  Nitrogen application rates  -  Nitrogen management  -  Rice  -  Water use efficiency

Classification code: 444 Water Resources

Water Resources

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821.3 Agricultural Methods

Agricultural Methods

  -  821.4 Agricultural Products

Agricultural Products

  -  913.1 Production Engineering

Production Engineering

DOI: 10.6041/j.issn.1000-1298.2018.05.036

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

38. Grading Method of Disease Severity of Wheat Stripe Rust Based on Hyperspectral Imaging Technology

Accession number: 20183705807478

Title of translation:

Authors: Lei, Yu (1, 2); Han, Dejun (3, 4); Zeng, Qingdong (4); He, Dongjian (1, 5)

Author affiliation: (1) College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) Key Laboratory of Agricultural Internet of Things, Ministry of Agriculture, Northwest A&F University, Yangling; Shanxi; 712100, China; (3) College of Agronomy, Northwest A&F University, Yangling; Shanxi; 712100, China; (4) State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling; Shaanxi; 712100, China; (5) Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent Service, Yangling; Shanxi; 712100, China

Corresponding author: He, Dongjian(hdj168@nwsuaf.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 226-232

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Wheat stripe rust caused by Puccinia striiformis f. sp. tritici, is one of the most important and devastating diseases in wheat production. Identification and classification of wheat stripe rust plays an important role in high-quality production of wheat, which helps to quantitatively assess the level of wheat stripe rust severity in the field to make strategies to achieve effective control for wheat stripe rust in early. Currently, estimation disease severity of wheat stripe rust is mainly relied on naked-eye observation according to the manual field investigation. However, this method is labour-intensive, time-consuming, besides requiring workers with high professional knowledge. In order to quickly and accurately evaluate the disease level of wheat stripe rust, a novel grading method of disease severity of wheat stripe rust based on hyperspectral imaging technology was proposed. Firstly, hyperspectral images of 320 infected at different levels and 40 healthy wheat leaf samples were captured by a HyperSIS hyperspectral system covering the visible and near-infrared region (400~1 000 nm). Secondly, via the analysis of spectral reflectance of leaf and background regions, there were obvious differences in spectral reflectance at the 555 nm wavelength. Therefore, the image of the 555 nm wavelength was named the feature image, which was manipulated by threshold segmentation to obtain a mask image. The logical and operation was conducted by using the original hyperspectral image and mask image to remove the background information. Thirdly, the principal component analysis (PCA) method was used for the dimension reduction of hyperspectral images. The operation results showed that the second principal component image (PC2) can significantly identify the stripe rust spot area and healthy area. On this basis, stripe rust spots area was efficiently segmented by using an Otsu method. Finally, the degree of the disease severity of wheat stripe rust was graded according to the proportion of stripe rust spots area on a whole leaf. To verify the effectiveness of the proposed method, a total of 270 leaf samples were collected for the performance evaluation. Experimental results showed that 265 samples could be accurately classified at different disease severities of wheat stripe rust and the overall classification accuracy was 98.15%. In conclusion, the experimental results indicated that the method using hyperspectral imaging technology proposed is able to satisfy the precision demand of quantitative calculation and provide a foundation for evaluating the field disease level of wheat stripe rust and a new idea for resistance identification method of wheat stripe rust. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 29

Main heading: Hyperspectral imaging

Controlled terms: Grading  -  Image segmentation  -  Independent component analysis  -  Infrared devices  -  Principal component analysis  -  Quality control  -  Reflection  -  Spectroscopy

Uncontrolled terms: Disease severity  -  Hyperspectral imaging technologies  -  Otsu method  -  Performance evaluations  -  Puccinia striiformis f. sp. tritici  -  Quantitative calculation  -  Stripe rust  -  Visible and near infrared

Classification code: 913.3 Quality Assurance and Control

Quality Assurance and Control

  -  922.2 Mathematical Statistics

Mathematical Statistics

Numerical data indexing: Percentage 9.82e+01%, Size 4.00e-07m to 1.00e-06m, Size 5.55e-07m

DOI: 10.6041/j.issn.1000-1298.2018.05.026

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

39. Three-dimensional Quantifications of Plant Growth Dynamics in Field-grown Plants Based on Machine Vision Method

Accession number: 20183705807482

Title of translation:

Authors: Zhu, Binglin (1); Liu, Fusang (1); Zhu, Jinyu (2); Guo, Yan (1); Ma, Yuntao (1)

Author affiliation: (1) College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China; (2) Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing; 100081, China

Corresponding author: Ma, Yuntao(yuntao.ma@cau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 256-262

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: High-throughput phenotyping of plant three-dimensional (3D) architecture is critical for determining plant phenotypic characteristics. The acquisition of 3D architecture of plant phenotypic traits based on machine vision has been widely applied in greenhouse research. Growth process of the plants can be dynamically monitored. However, the application of machine vision method in the field is less due to the complex environment. Machine vision method was used to obtain multi-view image sequences for field growth maize and soybean at different growth stages. Then 3D architecture of individual plants and its populations were reconstructed. The accuracy of calculated individual blade length and maximum width was evaluated according to the measured data. The results showed that there was a good agreement between measured and calculated blade length and blade maximum width with R2 which were both more than 0.97. Then the dynamic changes of plant height, crown surface and organ growth were extracted based on reconstructed 3D architecture automatically. The results can provide a method for high throughput phenotypic analysis related to genotypes and help to evaluate the plant architecture and canopy radiation. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 37

Main heading: Computer vision

Controlled terms: Architecture  -  Image reconstruction  -  Throughput

Uncontrolled terms: Complex environments  -  Different growth stages  -  High-throughput phenotyping  -  Maize plants  -  Multi-view image  -  Phenotype  -  Soybean plants  -  Three dimensional (3D) architectures

Classification code: 402 Buildings and Towers

Buildings and Towers

  -  723.5 Computer Applications

Computer Applications

DOI: 10.6041/j.issn.1000-1298.2018.05.030

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

40. Design and Experiment of Variable Speed Picking Hole Mechanism for Oval and Circular Gear Planetary System

Accession number: 20183705807467

Title of translation: --

Authors: Wang, Jinwu (1); Zhou, Wenqi (1); Li, Xin (1); Feng, Jinlong (2); Jiang, Dongxuan (1); Wang, Jinfeng (1)

Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) College of Engineering, Heilongjiang Bayi Agricultural University, Daqing; 163319, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 136-142

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming to the problem that picking hole mechanism of deep-fertilization liquid fertilizer applicator can not meet fertilizer-spraying needle inserted and pulled out of soil vertically all the time, according to the meshing characteristic of combining gears for oval non-circular with round gears. A new kind of picking hole mechanism was designed to achieve variable speed and vertical posture at picking hole. The meshing principle of oval gears were used, which controlled every moment change of angular velocity to achieve variable speed picking hole in the working period, the characteristic met specific requirement, which had horizontal velocity of fertilizer-spraying needle trend to zero inserted and pulled out of soil, small hole mouth was achieved. To achieve small hole mouth and picking hole for vertical posture, the mathematics model of mechanism was established, with the rotational speed of picking hole mechanism of 120 r/min, forward speed of 1.2 m/s and depth of picking hole of 80 mm as constraint conditions, structure parameters of mechanism were obtained, including half shaft distance of oval gear shaft of 39.9 mm, eccentricity of 0.15, diameter of circular gear pitch curve of 68 mm and length of fertilizer-spraying needle of 140 mm, and virtual experiment was verified by using the ADAMS software. The experiments of high-speed camera and picking hole were carried out, the trajectory shape of fertilizer-spraying needle, curve of level absolute velocity and hole width were obtained when the forward speed was 1.2 m/s, rotational speed of picking hole mechanism was 120 r/min and depth of picking hole was 80 mm, the reasons for the formation of such results were analyzed. Experiments results showed that fertilizer-spraying needle still guaranteed the target that had small hole mouth and picking hole for vertical posture. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Speed

Controlled terms: Applicators  -  Fertilizers  -  Gears  -  High speed cameras  -  Needles  -  Virtual reality

Uncontrolled terms: Absolute velocities  -  Constraint conditions  -  Liquid fertilizer applicators  -  Meshing characteristics  -  Oval gears  -  Performance experiment  -  Variable speed  -  Virtual experiments

Classification code: 601 Mechanical Design

Mechanical Design

  -  601.2 Machine Components

Machine Components

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  742.2 Photographic Equipment

Photographic Equipment

  -  804 Chemical Products Generally

Chemical Products Generally

Numerical data indexing: Rotational_Speed 1.20e+02RPM, Size 1.40e-01m, Size 3.99e-02m, Size 6.80e-02m, Size 8.00e-02m, Velocity 1.20e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.05.015

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

41. Experiment on Relationships among Physiological Maturity, Features of Beef Muscle Fiber and Beef Tenderness

Accession number: 20183705807497

Title of translation:

Authors: Chen, Kunjie (1); Ji, Fangfang (1); Xu, Jiaqi (1)

Author affiliation: (1) College of Engineering, Nanjing Agricultural University, Nanjing; 210031, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 375-381

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The physiological maturity of cow (cow age) is considered to be an important indicator of beef quality classification. For development of beef quality grading standard and the automatic beef grading system, a quantitative relationship between the age and tenderness of beef plays an vital role which has to be established. To research the relationships among cow age, features of beef muscle fiber and beef tenderness, and four different groups of longissimus dorsi beef with different ages were selected, after been sliced up and stained, the microscopic images of the ribeye regions sample were collected by microscopic machine. Then the diameter, circumference and density of each muscle fiber were measured by using image processing. After determining the shear force of each beef sample by using a texture analyzer, the change of diameter, perimeter and density of beef fiber with age were analyzed,the relationship between the diameter, perimeter as well as density and the shear force were then established, respectively. The experiment result revealed that the diameter and circumference of beef fiber were increased,while the muscle fiber density was linearly decreased with the increase of age of the cow (P © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Beef

Controlled terms: Fibers  -  Grading  -  Image processing  -  Muscle

Uncontrolled terms: Linear modeling  -  Longissimus dorsi  -  Microscopic image  -  Muscle fiber  -  Physiological maturity  -  Quality classification  -  Tenderness  -  Texture analyzers

Classification code: 461.2 Biological Materials and Tissue Engineering

Biological Materials and Tissue Engineering

  -  822.3 Food Products

Food Products

DOI: 10.6041/j.issn.1000-1298.2018.05.045

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

42. Design and Experiment of 2BDB-6(110) Soybean Bionic Intelligent Till-sowing Machine

Accession number: 20183705807463

Title of translation: 2BDB-6(110)

Authors: Jia, Honglei (1, 2); Zheng, Jian (1, 2); Zhao, Jiale (1, 2); Guo, Mingzhuo (1, 2); Zhuang, Jian (1, 2); Wang, Zenghui (3)

Author affiliation: (1) Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun; 130025, China; (2) College of Biological and Agricultural Engineering, Jilin University, Changchun; 130025, China; (3) College of Humanities and Sciences, Northeast Normal University, Changchun; 130117, China

Corresponding author: Zhao, Jiale(zhaojiale0313@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 93-107

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Insufficient soil water content and slower accumulated temperature rise of the plow layer during spring time tillage in Northeast China severely restricts soybean root growth and soybean development. Based on these issues, a 2BDB-6(110) soybean bionic intelligent till-sowing machine was designed, which was capable of shallow loosening, soil crushing, seeding, ridging and compaction. This machine could significantly raise the soil temperature and water content of plow layer when sowing and fertilizing. And then the bionics, machinery design, reverse engineering and curve fitting were methodologically combined to design a hare claw toe bionic shallow loosening shovel and a pangolin scale bionic ridging shovel both with the anti-drag function, and microcontroller was used to design pressure intelligent monitoring system. Field comparative tests confirmed that the bionic shallow loosening and ridging tillage preparing devices significantly increased the soil temperatures within a certain range, which outperformed the traditional tillage sowing device in reducing operational drag by 13%~20% and the real-time pressure monitoring device can significantly enhance the stability of compaction intensity and increase the average soil water content (0~100 mm) by 1.36%. Parameter optimization experiment suggested that the optimal parameters of tillage sowing combined operation were as follows: shallow loosening depth of 20 cm, and compaction strength of 48 kPa. By contrast verification test, it was found that compared with traditional seeding machine, the proposed machine could raise the soil temperature by 0.7(depth at 10 cm), 1.3(depth at 20 cm) and 0.9(depth at 30 cm), raise the average soil water content (0~100 mm) by 0.47%, advance soybean emergence time by 0.52 d, and increase soybean yield by 2.05%. It was a powerful guarantee for per-unit-area soybean production in Northeast China. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Agricultural machinery

Controlled terms: Agriculture  -  Biomimetics  -  Bionics  -  Compaction  -  Curve fitting  -  Drag  -  Machine design  -  Reverse engineering  -  Shovels  -  Soil moisture   -  Temperature

Uncontrolled terms: Accumulated temperatures  -  Combined operations  -  Intelligent monitoring systems  -  Parameter optimization  -  Pressure monitoring  -  Sowing machines  -  Variable rate fertilization  -  Verification tests

Classification code: 461 Bioengineering and Biology

Bioengineering and Biology

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  601 Mechanical Design

Mechanical Design

  -  641.1 Thermodynamics

Thermodynamics

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  921.6 Numerical Methods

Numerical Methods

Numerical data indexing: Percentage 1.36e+00%, Percentage 2.05e+00%, Percentage 4.70e-01%, Pressure 4.80e+04Pa, Size 0.00e+00m to 1.00e-01m, Size 1.00e-01m, Size 2.00e-01m, Size 3.00e-01m

DOI: 10.6041/j.issn.1000-1298.2018.05.011

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

43. ISE Monitoring of Macronutrients in Hydroponic Tomato Cultivation Based on Slope and Bias Correction Method

Accession number: 20183705807492

Title of translation: -ISE

Authors: Zhang, Miao (1, 2); Pan, Linpei (1); Yang, Qingliang (1); Zheng, Jie (1); Chen, Ming (1); Wang, Maohua (1)

Author affiliation: (1) Key Laboratory on Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, China Agricultural University, Beijing; 100083, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 342-347

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Monitoring macronutrients in hydroponic nutrient solution is a vital task for tomato growth. Ion-selective electrodes (ISEs) were used to detect the NO3-N, K+, Ca2+ concentrations. The slope and bias correction (SBC) method was applied to alleviate the signal drift of ISEs due to continuous immersion in nutrient solutions. The slopes of response Nernst equation for NO3-, K+, Ca2+ ISEs were decreased to 0.05, 0.39.and 0.04, and intercept potentials were reduced to 0.12.mV, 0.93.mV and 0.10.mV, respectively. It indicted the capacity of slope and bias correction method as improving the repeatability and consistency of each ISE’s Nernst equation. Then the NO3-N, K+ and Ca2+ concentrations were predicted by Nernst model, and they were measured by spectrographic method to provide standard values. The predicted accuracy of NO3-N, K+, Ca2+ concentrations was improved after using slope and bias correction method, providing by the relative errors were significantly reduced from 43.31%, 38.46% and 93.83% to 5.99%, 7.44% and 27.96%,respectively. It was obvious that the results obtained from ISEs coupled with slope and bias correction method could indeed reflect the macronutrients component in tomato nutrient solutions. The assimilation of macronutrients was activated in flower stage, with the decrease of 45.19%, 36.46% and 27.92% for NO3-N, K+ and Ca2+ concentrations, respectively. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Ion selective electrodes

Controlled terms: Chemical sensors  -  Electromagnetic wave attenuation  -  Fruits  -  Monitoring  -  Nutrients

Uncontrolled terms: Bias correction  -  Bias-correction methods  -  Hydroponic cultivation  -  Nernst equation  -  Nutrient solution  -  Relative errors  -  Tomato  -  Tomato cultivation

Classification code: 711 Electromagnetic Waves

Electromagnetic Waves

  -  801 Chemistry

Chemistry

  -  802.1 Chemical Plants and Equipment

Chemical Plants and Equipment

  -  821.4 Agricultural Products

Agricultural Products

Numerical data indexing: Percentage 2.79e+01%, Percentage 2.80e+01%, Percentage 3.65e+01%, Percentage 3.85e+01%, Percentage 4.33e+01%, Percentage 4.52e+01%, Percentage 7.44e+00%, Percentage 9.38e+01% to 5.99e+00%

DOI: 10.6041/j.issn.1000-1298.2018.05.040

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

44. Assessment of Contamination Risk of PCBs in Soils and Agricultural Products in Typical Irrigation District in Beijing

Accession number: 20183705807489

Title of translation:

Authors: Li, Yan (1, 2); Huang, Guanhua (2); Gu, Hua (1, 3); Huang, Quanzhong (2); Li, Lei (1, 3); Liu, Honglu (1, 3)

Author affiliation: (1) Beijing Water Science and Technology Institute, Beijing; 100048, China; (2) College of Water Resources and Civil Engineering, China Agricultural University, Beijing; 100083, China; (3) Beijing Engineering Technique Research Center for Exploration and Utilization of Non-conventional Water Resources and Water Use Efficiency, Beijing; 100048, China

Corresponding author: Liu, Honglu(liuhonglu@yeah.net)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 313-322

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to find out the concentration and pollution characteristics of polychlorinated biphenyls (PCBs) in topsoil and agricultural products in irrigation district at the southeastern suburb of Beijing, seven kinds of PCBs in 20.topsoil samples and 28.agricultural products samples in the irrigation district were detected by gas chromatography-mass spectrometry (GC-MS) in 2015. Results showed that the total concentrations of PCBs in topsoil were ranged from ND (lower than the limits of detection) to 0.711. 776.μg/kg, with average concentration of 0.43.μg/kg. The concentration of PCBs was increased with the increase of sewage irrigation history. The concentrations of PCBs in topsoil were relatively lower as compared with those in soil reported in other places. According to soil quality guidelines in Canada and American researcher’s risk assessment report, the concentrations of PCBs in topsoil did not pose a threat to the surrounding ecological environment. The concentrations of PCBs in winter wheat, Chinese spring onion, eggplant, pear, sweet potato and Chinese kale were lower than the detection limit. The concentrations of PCBs in summer maize grain, Chinese flowering cabbage, oil seed raped were 0.17~0.47.μg/kg, 1.63.μg/kg and 5.91. μg/kg, respectively. There was no significant difference for PCBs concentrations in summer maize grain among regions with different sewage irrigation histories. The concentrations of PCBs in agricultural products were relatively lower as compared with other studies. According to the tolerable daily intake (TDI) proposed by the U.S. Department of Health and Human Services, the concentrations of PCBs in agricultural products were less than the corresponding reference limit. For both soil and agricultural products, only the concentrations of 4-PCB were higher than the detection limit, so only 4-PCB could be detected, 1-PCB ~ 3-PCB and 5-PCB ~ 7-PCB could not be detected. The carcinogenic risk of adult and child caused by PCBs were 8.49×10-7 and 4.66×10-7, respectively. The non-carcinogenic hazard index of PCBs for child and adult were 3.88×10-1 and 1.41×10-1, respectively. All of them were lower than the threshold values proposed by US EPA. Dietary intake was the major route of human exposure, which accounted for 99.79%~99.95% of the total carcinogenic risk and 99.81%~99.94% of the total non-carcinogenic hazard index, respectively. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 58

Main heading: Soil pollution

Controlled terms: Agricultural products  -  Fertilizers  -  Gas chromatography  -  Grain (agricultural product)  -  Hazards  -  Irrigation  -  Mass spectrometry  -  Organic pollutants  -  Polychlorinated biphenyls  -  Risk assessment   -  Sewage  -  Soils

Uncontrolled terms: Average concentration  -  Department of healths  -  Ecological environments  -  Gas chromatography-mass spectrometries (GC-MS)  -  Irrigation districts  -  Polychlorinated biphenyl (PCBs)  -  Risk assessment reports  -  Tolerable daily intake

Classification code: 452.1 Sewage

Sewage

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  801 Chemistry

Chemistry

  -  802.3 Chemical Operations

Chemical Operations

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

  -  821.3 Agricultural Methods

Agricultural Methods

  -  821.4 Agricultural Products

Agricultural Products

  -  914.1 Accidents and Accident Prevention

Accidents and Accident Prevention

DOI: 10.6041/j.issn.1000-1298.2018.05.037

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

45. Calibration of Simulation Parameters for Potato Minituber Based on EDEM

Accession number: 20183705807466

Title of translation:

Authors: Liu, Wenzheng (1, 2); He, Jin (1, 2); Li, Hongwen (1, 2); Li, Xueqiang (2, 3); Zheng, Kan (1, 2); Wei, Zhongcai (1, 2)

Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) Shandong Provincial Intelligent Engineering and Technology Research Center for Potato Production Equipment, Dezhou; 253600, China; (3) Shandong Xicheng Agricultural Machinery Science and Technology Co., Ltd., Dezhou; 253600, China

Corresponding author: He, Jin(hejin@cau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 125-135

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to study the discrete element simulation physical parameters of potato minituber, the combination methods of experiment and simulation were used to calibrate contacting parameters of particle discrete simulation. The simulation experimental model was built in EDEM by using coefficient measurement model of restitution, particle-steel friction coefficient measurement model and particle-particle coefficient friction measurement model. The corresponding contacting parameters of particle discrete element was used as independent variable, the data which was measured by simulation model was used as evaluation index, and then curve fitting equation was built by changing the independent variables to obtain the corresponding evaluation index value in the simulation model. Finally, the factors measured in the real test model were substituted into curve fitting equation as the simulation target values to obtain the discrete element simulation contact parameters of potato minituber. The simulation experiment was verified through repeated simulation experiments. The particle discrete element simulation target parameters were obtained as the particle-steel coefficient of restitution was 0.523, the particle-particle coefficient of restitution was 0.478, the particle-steel coefficient of static friction was 0.644, the particle-steel coefficient of rolling friction was 0.022 1, the particle-particle coefficient of static friction was 0.325 and the particle-particle coefficient of rolling friction was 0.030 0. The calibrated physical parameters of the potato minituber were simulated by EDEM. The result showed that the calibrated particle stacking angles and seed distribution were consistent with the real experimental conditions. Simultaneously, the result can provide theoretical basis for the design and optimization of potato minituber related sowing equipment. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 39

Main heading: Curve fitting

Controlled terms: Calibration  -  Finite difference method  -  Stiction

Uncontrolled terms: Coefficient measurement  -  Coefficient of restitution  -  Coefficient of rolling frictions  -  Design and optimization  -  Discrete element simulation  -  Experimental conditions  -  Potato minituber  -  Simulation parameters

Classification code: 921.6 Numerical Methods

Numerical Methods

DOI: 10.6041/j.issn.1000-1298.2018.05.014

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

46. Design and Performance Analysis of Nested-LET Flexure Hinge

Accession number: 20183705807394

Title of translation: Nested-LET

Authors: Qiu, Lifang (1); Liu, Ningning (1); Chen, Mingkun (1); Yue, Xin (1)

Author affiliation: (1) School of Mechanical Engineering, University of Science and Technology Beijing, Beijing; 100083, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 420-426

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Flexibility and accuracy are two key factors that determine the performance of compliant joints, and also directly affect the application of compliant mechanisms. In fact, the two factors are mutually restricted. In order to improve the axial stiffness and rotation accuracy while maintaining good bending performance of joints in lamina emergent mechanisms (LEMs), a new type compliant joint based on the structure of lamina emergent torsional (LET) joint was proposed, and its structure was designed, named as Nested-LET. The close-form model of the Nested-LET was given, and the equivalent stiffness of bending and tensile-compressive was derived. The modified coefficients were presented to optimize the results, respectively. Comparing the result of theoretical calculation with finite element analysis (FEA), the theoretical formulas and modified coefficients were verified. Comparisons between the Nested-LET and outside LET joints with the same overall dimensions were made. The FEA results showed that bending stiffness of Nested-LET joint was 1.5.times larger, but tensile-compressive stiffness was increased by 30.times, and center-shift was reduced by 13%. Two corresponding joints were made of beryllium bronze material. Through the anti-tensile test, it can be concluded that the FEA results were in good agreement with the experimental results. The Nested-LET joint improved accuracy of the joint, and it can be used in the design of high-precision compliant joint. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Structural design

Controlled terms: Beryllium minerals  -  Bronze  -  Compliant mechanisms  -  Hinges  -  Mechanisms  -  Stiffness  -  Tensile testing  -  Universal joints

Uncontrolled terms: Compressive performance  -  Compressive stiffness  -  Equivalent stiffness  -  Flexure joints  -  Lamina emergent mechanisms  -  Performance analysis  -  Rotational precision  -  Theoretical calculations

Classification code: 408.1 Structural Design, General

Structural Design, General

  -  482.2 Minerals

Minerals

  -  544.2 Copper Alloys

Copper Alloys

  -  601.2 Machine Components

Machine Components

  -  601.3 Mechanisms

Mechanisms

  -  931.1 Mechanics

Mechanics

  -  951 Materials Science

Materials Science

Numerical data indexing: Percentage 1.30e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.051

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

47. Design and Numerical Simulation of Volute Axial Outflow Hydraulic Turbine with Low Specific Speed

Accession number: 20183705807475

Title of translation:

Authors: Mao, Xiuli (1); Li, Chunhua (2); Qu, Bo (3); Zheng, Yuan (3); Li, Wenling (4); Zhang, Xun (3)

Author affiliation: (1) College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling; Shanxi; 712100, China; (2) Nanjing Turbine & Electric Machinery (Group) Co., Ltd., Nanjing; 210037, China; (3) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing; 210098, China; (4) Maintenance Branch Company of State Grid Xinyuan Company, Beijing; 100086, China

Corresponding author: Qu, Bo(hhqubo@hotmail.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 204-211

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Considering the trend of small hydropower towards low head, and reusing the water surplus head of cooling tower, a new type of turbine with small size, high efficiency and super low specific speed was proposed to be as direct drive for fan in large cooling tower or applied in small hydropower plants for generating electricity, which was designed and validated based on design theory of fluid mechanics and validation method of numerical simulations. Combining binary theory and spiral potential flow to design the flow streamline in volute, the new type volute adopted axial outlet to ensure the turbine radial dimension was about half compared with similar conventional turbines, this kind of structure was a great benefit to decrease manufacturing cost, which was more conducive to ventilation in cooling tower. The work of impact annular blades reduced the turbine specific speed to a large extent which adapted to the internal structure of the cooling tower, the tangent of runner blade was perpendicular to the runner axis. Corresponding to the runner outlet, draft tube was designed with annual inlet, the water flow through the four water distribution pipes in the draft tube which was propitious to improve flow field performance in draft tube, meanwhile, the turbine was able to mount on the central base directly with this structure. Theoretical calculation on hydraulic loss in each domain was given and it was compared with corresponding data that acquired from numerical calculations; the results showed that the hydraulic loss in each domain was relatively small, and differences between them were less than 5%. Numerical calculations were carried out with model which was built in Solidedge and meshed in ICEM, SST k-ω was used in all simulations to capture fluid details, while monitoring points were located on guide vane and runner blade for obtaining pressure values. Numerical results showed that velocity at the volute outlet was consistent with constant velocity moment law and the flow field characteristics illustrated this model with good performance, and the predicting efficiency was around 90%. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Structural design

Controlled terms: Computer simulation  -  Cooling  -  Cooling towers  -  Digital storage  -  Efficiency  -  Flow fields  -  Flow of water  -  Fluid mechanics  -  Hydraulic motors  -  Hydraulic turbines   -  Hydroelectric power  -  Numerical methods  -  Numerical models  -  Turbomachine blades  -  Water supply systems

Uncontrolled terms: Flow field characteristics  -  Hydraulic designs  -  Small hydro-power plants  -  Super-low-specific-speed  -  Theoretical calculations  -  Volute axial outflow  -  Water distribution pipes  -  Water turbines

Classification code: 408.1 Structural Design, General

Structural Design, General

  -  446.1 Water Supply Systems

Water Supply Systems

  -  611.1 Hydroelectric Power Plants

Hydroelectric Power Plants

  -  617.1 Hydraulic Turbines

Hydraulic Turbines

  -  631.1 Fluid Flow, General

Fluid Flow, General

  -  631.1.1 Liquid Dynamics

Liquid Dynamics

  -  632.2 Hydraulic Equipment and Machinery

Hydraulic Equipment and Machinery

  -  641.2 Heat Transfer

Heat Transfer

  -  722.1 Data Storage, Equipment and Techniques

Data Storage, Equipment and Techniques

  -  723.5 Computer Applications

Computer Applications

  -  913.1 Production Engineering

Production Engineering

  -  921 Mathematics

Mathematics

  -  921.6 Numerical Methods

Numerical Methods

  -  931.1 Mechanics

Mechanics

Numerical data indexing: Percentage 5.00e+00%, Percentage 9.00e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.023

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

48. Measurement Method of Vegetable Seedling Leaf Morphology Based on Photometric Stereo

Accession number: 20183705807457

Title of translation:

Authors: Feng, Qingchun (1, 2); Chen, Jian (2); Li, Cuiling (1, 3); Fan, Pengfei (1, 4); Wang, Xiu (1, 4)

Author affiliation: (1) Beijing Research Center of Intelligent Equipment for Agriculture, Beijing; 100097, China; (2) College of Engineering, China Agricultural University, Beijing; 100083, China; (3) National Research Center of Intelligent Equipment for Agriculture, Beijing; 100097, China; (4) Beijing Key Laboratory of Intelligent Equipment Technology for Agriculture, Beijing; 100097, China

Corresponding author: Wang, Xiu(wangx@nercita.org.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 43-50

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to achieve the on-line nondestructive assessment for vegetable seedling growth, the method and device for measuring the seedling’s leaf spatial morphology based on photometric stereo vision was introduced, and the morphology information, including seedling leaf’s inclination angle, length and size. The 15~30 d pepper seedlings were adopted as research objects, and the test device for measuring their canopy leaves was built, which involved the four different LED lights’ orientation calibration and the image color’s linear correction referring to the D65 palette’s color variation under the various illumination. According to the light reflexive relation on the calibration ball from the LED lights to the camera, the spatial orientations of illuminants under the camera coordinate were determined. And the image color correction was supposed to overcome the color distortion caused from the lights’ luminance fluctuation. According to the seedling leaves’ light-shadow feature under various illuminants, the discrete gradient information along the leaf’s main vein was obtained based on photometric stereo vision. And referring to the gradients vectors, the leaf’s space plane was fit by adopting the least-square principle. The leaf’s inclination angle was measured as the angle between the fitting plane and camera imaging plane, thus the actual spatial leaf size also could be accurately measured on the basis of the image size. As the test result shown, compared with the manual measurement result, the auto-measurement method had an average errors of 6.29° for leaf inclination angle, 3.82 mm for leaf length, and 56.53 mm2 for leaf size, and the determination coefficients on the length and leaf size measurement were 0.936 3 and 0.866 4, respectively. Besides, the measuring result would be more accurate for the younger seedling with fully-opened and unoverlapped leaves. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Color image processing

Controlled terms: Calibration  -  Cameras  -  Color  -  Forestry  -  Light emitting diodes  -  Morphology  -  Nondestructive examination  -  Photometry  -  Stereo image processing  -  Stereo vision   -  Vector spaces  -  Vegetables

Uncontrolled terms: Leaf inclination  -  Leaf size  -  Photometric stereo  -  Plane fitting  -  Vegetable seedlings

Classification code: 714.2 Semiconductor Devices and Integrated Circuits

Semiconductor Devices and Integrated Circuits

  -  723.2 Data Processing and Image Processing

Data Processing and Image Processing

  -  723.5 Computer Applications

Computer Applications

  -  741.1 Light/Optics

Light/Optics

  -  741.2 Vision

Vision

  -  742.2 Photographic Equipment

Photographic Equipment

  -  821.4 Agricultural Products

Agricultural Products

  -  921 Mathematics

Mathematics

  -  941.4 Optical Variables Measurements

Optical Variables Measurements

  -  951 Materials Science

Materials Science

Numerical data indexing: Area 5.65e-05m2, Size 3.82e-03m

DOI: 10.6041/j.issn.1000-1298.2018.05.005

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

49. Seed Maize Field Identification Based on Analysis of Remote Sensing Timing Spectrum and High Resolution Texture

Accession number: 20183705807477

Title of translation:

Authors: Zhang, Chao (1, 2); Qiao, Min (1); Liu, Zhe (1); Liu, Diyou (1); Jin, Hongshan (1); Zhu, Dehai (1, 2)

Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory for Agricultural Land Quality Monitoring and Control, Ministry of Land and Resources, Beijing; 100035, China

Corresponding author: Liu, Zhe(liuz@cau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 218-225

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Using remote sensing technology to rapidly and accurately differentiate the seed maize fields and grain maize fields is the urgent need of seed production and market supervision, and also is an important aspect of the research on the classification and planting mode of crops by using remote sensing to monitor. Based on the spectral and texture differences of seed maize and other crops in the high resolution remote sensing image, the multi-source remote sensing data were used, including GF-1 WFV multi-spectral image, Landsat8 OLI image and GF-2 PMS full-color image to extract the seed maize fields as research target, the vegetation index system of crop multi-temporal spectral characteristics was proposed, which multidimensionally reflected different spectral differences between crops; and adding the image rotation invariant processing before the texture detection, to solve the problem of crop field texture direction in remote sensing image; finally, the identification method system of seed maize fields based on multi-temporal spectral feature and LBP-GLCM texture feature in high spatial resolution remote sensing image were established. Qitai County, Xinjiang Uygur Autonomous Region was taken as the study area to verify, based on the above method and the random forest classifier, the overall accuracy was 90.57%, the Kappa coefficient was 0.79. The accuracy of the classification results of seed maize field was 99.20%, and the mapping accuracy was 86.68%, which basically satisfied the needs of seed maize recognition requirements. The research result not only provided a method for the monitoring of hybrid maize seed production in China, but also provided a technical reference for monitoring and supervision of hybrid seed field with the same planting system. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Remote sensing

Controlled terms: Crops  -  Decision trees  -  Seed  -  Spectroscopy  -  Timing circuits  -  Vegetation

Uncontrolled terms: High resolution remote sensing images  -  Maize fields  -  Multi-Sources  -  Random forest classifier  -  Random forests  -  Remote sensing technology  -  Vegetation index  -  Xinjiang Uygur autonomous region

Classification code: 713.4 Pulse Circuits

Pulse Circuits

  -  821.4 Agricultural Products

Agricultural Products

  -  961 Systems Science

Systems Science

Numerical data indexing: Percentage 8.67e+01%, Percentage 9.06e+01%, Percentage 9.92e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.025

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

50. Design and Experiment of Damped Continuously Adjustable Shock Absorber with Built-in Solenoid Valve

Accession number: 20183705807500

Title of translation: 10.6041/j.issn.1000-1298.2018.05.048

Authors: Xia, Changgao (1); Liang, Aijin (1); Yang, Hongtu (1); Zhu, Xiaobin (1); Han, Jiangyi (1)

Author affiliation: (1) College of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang; 212013, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 397-403

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Due to the requirements of suspension layout space and vehicle performance, a damped continuously adjustable shock absorber with built-in solenoid valve was designed based on principle of pilot valve. The structure of the adjustable shock absorber and the formation principle of adjustable damping force were introducted. And then the working strokes of the adjustable shock absorber was modeled mathematically based on the theory of fluid mechanics and the abstract model of shock absorber working stroke. The simulation model was also established by Matlab/Simulink and different characteristics of the adjustable shock absorber at different currents were obtained. Combining with the national standard of the passive shock absorber, the experiment proposal of the novel damped continuously adjustable shock absorber was designed. At the same time, the adjustable shock absorber test was carried out on the INSTRON-8800.CNC hydraulic servo single-channel excitation platform. From the test results, it can be seen that the adjustment range of rebound damping force was 0~3.72.kN, the adjustment range of compression damping force was 0~1.01. kN. The error of the test and simulation results did not exceed 10% as the current was in the range of 0.2~1.4.A and it did not exceed 20% as the current was more than 1.4.A, which confirmed the accuracy of the damper model and feasibility of the damped continuously adjustable shock absorber. The relationships between the damping force and the currents were acquired which can provide data support for the matching development of its semi-active suspension controller and provide the reference for the design of the damped continuously adjustable shock. The relationships between the damping force and the currents were acquired, which can provide data support for the matching development of its semi-active suspension controller and provide the reference for the design of the damped continuously adjustable shock. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Shock absorbers

Controlled terms: Damping  -  Design  -  Experiments  -  Fluid mechanics  -  MATLAB  -  Solenoid valves  -  Solenoids  -  Structural analysis  -  Suspensions (components)  -  Vehicle performance

Uncontrolled terms: Abstract modeling  -  External characteristic  -  MATLAB /simulink  -  National standard  -  Passive shock absorbers  -  Semi active suspension  -  Simulation model  -  Single channels

Classification code: 408.1 Structural Design, General

Structural Design, General

  -  601.2 Machine Components

Machine Components

  -  619 Pipes, Tanks and Accessories; Plant Engineering Generally

Pipes, Tanks and Accessories; Plant Engineering Generally

  -  662.1 Automobiles

Automobiles

  -  704.1 Electric Components

Electric Components

  -  901.3 Engineering Research

Engineering Research

  -  921 Mathematics

Mathematics

  -  931.1 Mechanics

Mechanics

Numerical data indexing: Percentage 1.00e+01%, Percentage 2.00e+01%

DOI: 10.6041/j.issn.1000-1298.2018.05.048

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

      

51. Design and Parameter Optimization of Dielectric Elastomer Roll Transducer

Accession number: 20183705807502

Title of translation:

Authors: Cao, Jianbo (1); Ren, Yuxue (1); E, Shiju (1); Xia, Wenjun (1); Zhang, Haiting (1); Zhu, Xilin (1)

Author affiliation: (1) College of Engineering, Zhejiang Normal University, Jinhua; 321004, China

Corresponding author: E, Shiju(276828373@qq.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 5

Issue date: May 25, 2018

Publication year: 2018

Pages: 412-419

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Dielectric elastomer (DE) are a kind of novel smart materials that exhibit change in size or shape when stimulated by an electric field, based on Maxwell’s effect. To study the power generation characteristics of dielectric elastomer transducer in pure shear tensile, dielectric elastomer roll transducer with prestretch properties was made by spring and the electromechanical coupling mode of dielectric elastomer transducer in pure shear tensile was established based on the Neo-Hooken model, and the corresponding simulation model was set up in Matlab/Simulink environment. The simulation research of the power generation characteristics of dielectric elastomer transducer and the influence of different spring coefficients on its generation characteristics were carried out. The experimental research was done by making dielectric elastomer roll transducer, and compared with the simulation results. The simulation and test results showed that the power characteristics of dielectric elastomer roll transducer were higher than those of the general tensile mode transducer. Under the same condition of tensile mode, initial voltage and the prestretch limitations, the power characteristic was increased with the increase of elastic coefficient. The above results about dielectric elastomer roll transducer provided theoretical reference for applications of dielectric elastomer generators in the field of vibration energy harvesting in the future. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Dielectric materials

Controlled terms: Elastomers  -  Electric fields  -  Electromechanical coupling  -  Energy harvesting  -  MATLAB  -  Plastics  -  Springs (components)  -  Transducers

Uncontrolled terms: Dielectric elastomer transducers  -  Dielectric elastomers  -  Experimental research  -  MATLAB/Simulink environment  -  Parameter optimization  -  Power characteristic  -  Pure shear  -  Vibration energy harvesting

Classification code: 525.5 Energy Conversion Issues

Energy Conversion Issues

  -  601.2 Machine Components

Machine Components

  -  701.1 Electricity: Basic Concepts and Phenomena

Electricity: Basic Concepts and Phenomena

  -  708.1 Dielectric Materials

Dielectric Materials

  -  817.1 Polymer Products

Polymer Products

  -  818.2 Elastomers

Elastomers

  -  921 Mathematics

Mathematics

DOI: 10.6041/j.issn.1000-1298.2018.05.050

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village