2018年第6期共收录50篇

1. Effect of High Pressure Homogenization on Flexibility and Emulsifying Properties of Soy Protein Isolate and Correlation Analysis

Accession number: 20183905870787

Title of translation: 高压均质对大豆蛋白柔性和乳化性的影响及相关性分析

Authors: Wang, Xibo (1); Xu, Yeye (1); Yu, Jie (1); Wang, Jian (1); Wang, Xiaodan (1); Jiang, Lianzhou (1)

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

Corresponding author: Jiang, Lianzhou(jlzname@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 362-367

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The sensitivity of soy protein isolate to trypsin was characterized by its flexibility. The effects of different homogenization pressures (0~200 MPa) on soy protein isolate flexibility and emulsifying properties were investigated. The changes of soy protein isolate structure and the correlation analysis between flexibility and emulsifying properties (emulsifying activity and emulsion stability) were also investigated. The results showed that when the homogenization pressure was 0~160 MPa, the soy protein isolate flexibility was increased with the increase of the homogenization pressure, while the flexibility did not change obviously at 160~180 MPa. When the homogenization pressure was 180~200 MPa, the soy protein isolate flexibility was declined. The surface hydrophobicity was increased with the increase of homogeneous pressure, while the turbidity was decreased. The changing tendency and flexibility of the emulsification property with homogeneous pressure were consistent with the homogeneous pressure. Correlation analysis suggested that the soy protein isolate flexibility had a linear positive correlation with the emulsifying activity and the emulsifying stability, and the correlation coefficients were 0.893 and 0.938, respectively. Through ultraviolet spectral scanning analysis of soy protein isolate and endogenous tryptophan fluorescence spectroscopy analysis, it was found that as the conformational flexibility of soy protein isolate was increased, the structure became more stretch. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 35

Main heading: Emulsification

Controlled terms: Amino acids  -  Correlation methods  -  Fluorescence spectroscopy  -  High pressure effects  -  Proteins

Uncontrolled terms: Correlation analysis  -  Emulsifying property  -  Flexibility  -  High pressure homogenization  -  Soy protein isolates

Classification code: 741.3 Optical Devices and Systems

Optical Devices and Systems

  -  802.3 Chemical Operations

Chemical Operations

  -  804.1 Organic Compounds

Organic Compounds

  -  922.2 Mathematical Statistics

Mathematical Statistics

Numerical data indexing: Pressure 0.00e+00Pa to 1.60e+08Pa, Pressure 0.00e+00Pa to 2.00e+08Pa, Pressure 1.60e+08Pa to 1.80e+08Pa, Pressure 1.80e+08Pa to 2.00e+08Pa

DOI: 10.6041/j.issn.1000-1298.2018.06.043

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

2. Experiment on Freeze-drying of Instant Coffee with Initial Porosity

Accession number: 20183905870785

Title of translation: 具有初始孔隙的速溶咖啡冷冻干燥试验

Authors: Wang, Wei (1); Li, Qiangqiang (1); Chen, Guohua (2); Li, Hengle (1); Yang, Jing (1); Zhang, Shuo (1)

Author affiliation: (1) School of Chemical Machinery and Safety, Dalian University of Technology, Dalian; 116024, China; (2) Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 347-353

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to decrease the freeze-drying time and reduce the process energy consumption, frozen coffee materials with prefabricated porosity were prepared and freeze-dried to explore its influence on freeze-drying experimentally. Instant coffee was selected as the solute in aqueous solution. Results showed that freeze-drying can be remarkably enhanced with the initially unsaturated frozen material compared with the traditionally saturated one. SEM images of dried products revealed that the initial unsaturated material had the spherical and uniformed porous structure, which was favorable to migration of sublimated vapor and improvement of the drying rate. Chamber pressure, which was ranged from 11 Pa to 33 Pa, had little effect on the freeze-drying process and increasing ambient temperature can be beneficial to the freeze-drying process. Combined heating can significantly reduce the drying time further. When the temperature was above 45, the saturated material was found to collapse causing the failure of freeze-drying. In contrast, the unsaturated one can bear higher operation temperature resulting in a relatively high drying efficiency. The conventionally saturated material experiences the raising rate stage, constant rate stage and falling rate stage during freeze-drying, while the unsaturated material was always in the falling rate stage throughout the process. Freeze-drying of initially unsaturated material would impose significant effect on the traditional freeze-drying process of agricultural products. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 25

Main heading: Drying

Controlled terms: Agricultural products  -  Energy utilization  -  Experiments  -  Image enhancement  -  Low temperature drying  -  Plants (botany)  -  Porosity  -  Solutions

Uncontrolled terms: Drying efficiency  -  Freeze drying  -  Freeze-drying process  -  Frozen materials  -  Operation temperature  -  Porous structures  -  Saturated materials  -  Unsaturated materials

Classification code: 525.3 Energy Utilization

Energy Utilization

  -  802.3 Chemical Operations

Chemical Operations

  -  821.4 Agricultural Products

Agricultural Products

  -  901.3 Engineering Research

Engineering Research

  -  931.2 Physical Properties of Gases, Liquids and Solids

Physical Properties of Gases, Liquids and Solids

Numerical data indexing: Pressure 1.10e+01Pa to 3.30e+01Pa

DOI: 10.6041/j.issn.1000-1298.2018.06.041

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

3. Deformation Measurement Technology and Grade Evaluation of Rice Seedling Trays

Accession number: 20183905870762

Title of translation: 水稻秧盘形变测度方法与等级评价研究

Authors: Chen, Lintao (1); Ma, Xu (1); Li, Zehua (2); Li, Hongwei (1); Guo, Linjie (1); Chen, Tao (1)

Author affiliation: (1) College of Engineering, South China Agricultural University, Guangzhou; 510642, China; (2) College of Mathematic and Information, 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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 159-166

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The present status of research and application of rice seedling trays was introduced, and the operation performance of the industrialization automatic seedling nursing production line after deformation due to long-term use or improper transportation was detailed. Regarding deformation of hard tray like blanket as the research object, a deformation measurement technology was put forward. Three indexes of deformation, such as rupture length, twist warp and bending deformation, were introduced into the study. According to the above results, the deformable seedlings were divided into four grades, mild, moderate, slightly severe and severely deformed seedlings, and the applicable criterions of four kinds of deformation seedling plates were standardized. In order to verify the reasonableness and feasibility of the grading evaluation of the deformed seedling tray, from the point of improving the mechanical reliability of precision seeding seedling production line, deformation seedling tray was selected in maximum for seedling nursing production line. The success rate of tray feeding and tray stacking and the seed exposed rate as the evaluation index, 2SJB-500 precision rice sowing seedling nursing production lines were used to test various deformed seedling trays’ seedling nursing performance. The test proved the evaluation accuracy of the grading of deformed seedling tray and revealed the relationship between the deformation of the seedling tray, the index of the deformation amount and the productivity. For the four types of deformed tray, the success rate of tray feeding and the success rate of tray stacking showed an obviously declined trend, the seed exposure rate showed an increased trend with the increase of productivity. The tray with mild deformation and moderate deformation had small deformation, the tray of mild deformation can keep going on using; for moderate deformed tray, if the flange or the bottom of the tray existed a little broken, it should be properly removed on the operation, which can be used for the seedling nursing production line in lower productivity; for slightly severe deformed tray, if there was a larger deformation index, it should be selectively removed on the operation. As for the tray edge with many broken areas, the large bottom crack, the serious twist degree in some seedling trays, it can be directly removed; for the severe deformed seedling tray, it should be directly removed on the operation, otherwise it would affect the final seedling nursing performance in the factory production line. The proposed technology of the deformation measurement in tray was simple and easy-to-operate for evaluating the deformation degree of tray intuitively and vividly. Meanwhile, this guideline provided a research basic for the automatic identification, detection and elimination system of deformed seedling trays in the subsequent seedling production lines. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 27

Main heading: Deformation

Controlled terms: Automation  -  Grading  -  Nursing  -  Productivity

Uncontrolled terms: Automatic identification  -  Deformation measurements  -  Mechanical reliability  -  Moderate deformations  -  Operation performance  -  Research and application  -  Rice seedlings  -  Seedling nursing performance

Classification code: 461.7 Health Care

Health Care

  -  731 Automatic Control Principles and Applications

Automatic Control Principles and Applications

DOI: 10.6041/j.issn.1000-1298.2018.06.018

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

4. Terrain Following Method of Plant Protection UAV Based on Height Fusion

Accession number: 20183905870746

Title of translation: 基于高度融合的植保无人机仿地飞行方法研究

Authors: Wu, Kaihua (1); Sun, Xuechao (1); Zhang, Jingcheng (1); Chen, Fengnong (1)

Author affiliation: (1) College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, Hangzhou; 310018, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 17-23

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Multi-rotor plant protection unmanned aerial vehicle (UAV) in sloping fields was usually operated at a height of 1.5~3 m above the crops. The significance of the terrain following is that the height of the plant protection UAV above the crops do not change when the gradient of the terrain changes. The plant protection UAV needed to maintain a stable terrain following to ensure the safety of flight and spray uniformity. A terrain following method was proposed by using millimeter wave radar. The pre millimeter wave radar was used for slope judgment. When the slope was small, the height of the differential GPS and the height of the ground penetrating millimeter wave radar were filtered by Kalman filter, which can improve the accuracy. When the slope changed beyond the threshold, the height of the pre millimeter wave radar and ground penetrating millimeter wave radar were fused by multi-radar information fusion, which can improve the response speed. Then fuzzy PID algorithm was used to control the height of plant protection UAV. Through simulation and field flight test, the millimeter wave radar was accurate over the crops, and the height error of terrain following was less than 40 cm. The results showed that the adaptability and the spray uniformity of the plant protection UAV in sloping fields were ensured. The research on terrain following laid a solid foundation for the automatic operation of the plant protection UAV under various terrains. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Millimeter waves

Controlled terms: Aircraft control  -  Antennas  -  Crops  -  Flight simulators  -  Fuzzy filters  -  Information fusion  -  Kalman filters  -  Landforms  -  Microwave filters  -  Radar   -  Three term control systems  -  Unmanned aerial vehicles (UAV)

Uncontrolled terms: Fuzzy - pid controls  -  Millimeter wave radar  -  Plant protection  -  Radar information  -  Terrain following

Classification code: 481.1 Geology

Geology

  -  652 Aircraft and Avionics

Aircraft and Avionics

  -  652.1 Aircraft, General

Aircraft, General

  -  703.2 Electric Filters

Electric Filters

  -  711 Electromagnetic Waves

Electromagnetic Waves

  -  716.2 Radar Systems and Equipment

Radar Systems and Equipment

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  731.1 Control Systems

Control Systems

  -  821.4 Agricultural Products

Agricultural Products

  -  903.1 Information Sources and Analysis

Information Sources and Analysis

Numerical data indexing: Size 1.50e+00m to 3.00e+00m, Size 4.00e-01m

DOI: 10.6041/j.issn.1000-1298.2018.06.002

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

5. Formation and Stability of Zeaxanthin Dipalmitate Emulsions

Accession number: 20183905870786

Title of translation: 玉米黄素双棕榈酸酯乳液制备及其稳定性研究

Authors: Wen, Xin (1); Li, Mo (1); Eran, Sevcan (2); Hu, Rui (3); Geng, Na (1); Ni, Yuanying (1)

Author affiliation: (1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing; 100083, China; (2) Institute of Food Science and Biotechnology, University of Hohenheim, Stuttgart; 70599, Germany; (3) Food and Drug Administration of Beijing Xicheng District, Beijing; 100033, China

Corresponding author: Ni, Yuanying(niyycau@hotmail.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 354-361

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The impact of emulsifier type (soy lecithin (SL), decaglycerol monooleate (PGE18), decaglycerolmonolaurate (PGE12), sucrose ester (SE15), Tween 80 (T80) and whey protein isolate (WPI)) and carrier oil (soybean oil (SO) and medium chain triglyceride (MCT)) on the properties and stability of zeaxanthin dipalmitate (ZDP)-fortified emulsions was investigated. The oil in water emulsions using MCT as carrier oil exhibited better physical and chemical stability than the SO emulsions among all emulsifiers, with the exception of T80. PGE18 produced emulsions with the best overall properties and stability. The impact of PGE18 concentrations on the property of ZDP-fortified emulsions was therefore investigated further. The results showed PGE18 at concentration of 0. 8% produced emulsions with significantly smaller droplet size and higher particle charge, either preparing with SO or MCT, while MCT emulsion (177.7 nm) had smaller droplet size than SO emulsion (200.2 nm). Increasing ZDP contents in emulsion from 4 nmol/g to 32 nmol/g emulsion had no effect on droplet size and particle charge, and produced a color change from light yellow to orange-yellow. Briefly, the ZDP emulsion prepared by PGE18 (0.8%) and MCT through high pressure homogenization had droplet size smaller than 200 nm and adequate particle charge (about -16 mV), and remained about 90% of the original ZDP after 28 days’ storage at 4, which might be used as a potential zeaxanthin supplement or natural pigment in food and beverage products. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 32

Main heading: Emulsification

Controlled terms: Chemical stability  -  Convergence of numerical methods  -  Drops  -  Emulsions  -  Food storage  -  Soybean oil

Uncontrolled terms: Carotenoids  -  Formation  -  High pressure homogenization  -  Medium chain triglycerides  -  Natural pigment  -  Oil-in-water emulsions  -  Whey protein isolate  -  Zeaxanthin dipalmitate

Classification code: 694.4 Storage

Storage

  -  801 Chemistry

Chemistry

  -  802.3 Chemical Operations

Chemical Operations

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

  -  921.6 Numerical Methods

Numerical Methods

Numerical data indexing: Molality 4.00e-06mol/kg to 3.20e-05mol/kg, Percentage 8.00e+00%, Percentage 8.00e-01%, Percentage 9.00e+01%, Size 1.78e-07m, Size 2.00e-07m, Voltage -1.60e-02V

DOI: 10.6041/j.issn.1000-1298.2018.06.042

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

6. LQR-GA Path Tracking Control of Articulated Vehicle Based on Predictive Information

Accession number: 20183905870789

Title of translation: 基于预见位姿信息的铰接式车辆LQR-GA路径跟踪控制

Authors: Meng, Yu (1); Wang, Yu (1); Gu, Qing (1); Bai, Guoxing (1)

Author affiliation: (1) College 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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 375-384

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Articulated vehicle is one of the utmost members of intelligent mining equipment and working under terrible conditions, which has the special steering structure and driving characteristics. In order to improve the tracking accuracy and response speed of the articulated vehicle, a linear quadratic regulator (LQR) strategy based on predictive information was proposed and a genetic algorithm (GA) was used to optimize the state quantity matrix, and the optimal LQR state feedback controller was obtained to realize the precise path tracking control of the articulated vehicle. The control result was reflected by the displacement deviation, the heading deviation and the curvature deviation. In the co-simulation (ADAMS-Matlab/Simulink) results, the displacement deviation was 0.03 m, the deviation error was 1.3%, the heading deviation error was 0.19%, and the curvature deviation converged to be 0.003 m-1. The co-simulation and experiment results showed that the proposed control method can effectively improve the control precision. The control strategy proposed can achieve the precise and stable path tracking of articulated vehicles, which was an alternative control method. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Genetic algorithms

Controlled terms: MATLAB  -  Mining equipment  -  Navigation  -  State feedback  -  Vehicles

Uncontrolled terms: Articulated vehicle  -  Curvature deviations  -  Driving characteristics  -  Linear quadratic regulator  -  Path tracking  -  Path tracking control  -  Predictive information  -  State feedback controller

Classification code: 502.2 Mine and Quarry Equipment

Mine and Quarry Equipment

  -  731.1 Control Systems

Control Systems

  -  921 Mathematics

Mathematics

Numerical data indexing: Percentage 1.30e+00%, Percentage 1.90e-01%, Size 3.00e-02m

DOI: 10.6041/j.issn.1000-1298.2018.06.045

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

7. Nitrogen Monitoring of Winter Wheat Based on Unmanned Aerial Vehicle Remote Sensing Image

Accession number: 20183905870768

Title of translation: 基于无人机遥感影像的冬小麦氮素监测

Authors: Liu, Changhua (1); Wang, Zhe (1); Chen, Zhichao (1); Zhou, Lan (2); Yue, Xuezhi (1); Miao, Yuxin (2)

Author affiliation: (1) College of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo; 454000, China; (2) College of Resource and Environment, China Agricultural University, Beijing; 100194, China

Corresponding author: Chen, Zhichao(logczc@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 207-214

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Accurate nitrogen (N) management is a promising strategy to improve crop N use efficiency. It is important to accurately estimate the state of wheat nitrogen by unmanned aerial vehicle (UAV) remote sensing. The experiment was arranged in science and technology yard base in Laoling City, Shandong Province. The eight-rotor UAV was used to carry a Mini-MCA multispectral camera and collect the wheat canopy spectral data about four key stages (returning green stage, elongation stage, booting stage and flowering stage) of growth and development in 2016. Meanwhile, winter wheat samples of biomass, nitrogen uptake and nitrogen nutrient index were collected and measured synchronously. Grain yield was measured in mature stage. In critical stages and whole stage of different vegetation, indexes and agronomy parameters regression analysis models were established to assess winter wheat nitrogen nutrition diagnostic potential based on UAV remote sensing image. The results showed that it had better estimation of winter wheat nitrogen index (R2 was 0.45~0.96) based on UAV remote sensing image and the decision coefficient was gradually increased with the elapse of growth period. And those in elongation stage, booting stage and flowering stage were similar and had better ability for yield estimation. DATT power function model was the most powerful to explain the wheat nitrogen nutrition index (R2 was 0.95) in flowering stage. Therefore, the platform for multiple UAV rotorcraft synchronization carrying multi-spectral camera had better nitrogen diagnosis potential for winter wheat and it can be used to guide the precise nitrogen fertilizer management. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 33

Main heading: Nitrogen fertilizers

Controlled terms: Antennas  -  Cameras  -  Crops  -  Nutrients  -  Nutrition  -  Regression analysis  -  Remote sensing  -  Unmanned aerial vehicles (UAV)  -  Vegetation

Uncontrolled terms: Nitrogen nutrient  -  Nitrogen uptake  -  Vegetation index  -  Winter wheat  -  Yield

Classification code: 461.7 Health Care

Health Care

  -  652.1 Aircraft, General

Aircraft, General

  -  742.2 Photographic Equipment

Photographic Equipment

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821.4 Agricultural Products

Agricultural Products

  -  922.2 Mathematical Statistics

Mathematical Statistics

DOI: 10.6041/j.issn.1000-1298.2018.06.024

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

8. Design and Test of Maize Seeding Unit Downforce Control System

Accession number: 20183905870752

Title of translation: 玉米播种单体下压力控制系统设计与试验

Authors: Fu, Weiqiang (1, 2); Dong, Jianjun (2); Mei, Hebo (2); Gao, Na’na (2); Lu, Caiyun (1, 2); Zhang, Junxiong (1)

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

Corresponding author: Zhang, Junxiong(cau2007@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 68-77

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In view of the deficiency of traditional method of controlling the consistency of maize seeding depth, the method for controlling the consistency of seeding depth based on the force feedback was carried out and the downforce control system for maize seeding unit was developed. The system consisted of hydraulic cylinder mounted on the parallel four bar linkage profiling mechanism in a seeding unit, hydraulic system, downforce sensor, controller and vehicle computer. According to the force sensor information and the downforce threshold, the controller calculated and output the control value to hydraulic valves. The hydraulic cylinder was drived by valves to adjust parallel four connecting rod profiling mechanism to make the depth wheels and the surface pressure within the set threshold interval, so as to ensure the consistency of seeding depth. The field tests showed that the average quality rate of seeding depth of mechanical control of downforce and electric control downforce were 77.04% and 90.37%, respectively, while the seeding depth criterion was (5.0±1.0) cm, and the average quality rate of sowing depth of electric control downforce was 13.33 percentage points higher than that of mechanical control. Nevertheless, when the seeding depth criterion was (5.0±0.5) cm, the corresponding seeding depth quality rate were 31.11% and 56.30%, respectively, and the average quality rate of sowing depth of electric control downforce was 25.19 percentage points higher than that of mechanical control. The test results showed that the downforce control system can greatly maintain seeding depth stability and improve seed depth uniformity. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 31

Main heading: Quality control

Controlled terms: Control systems  -  Controllers  -  Cylinders (shapes)  -  Depth profiling  -  Hydraulic control equipment  -  Hydraulic machinery  -  Mechanical actuators  -  Seed

Uncontrolled terms: Electro-hydraulic control systems  -  Hydraulic cylinders  -  Maize  -  Mechanical control  -  Percentage points  -  Planter  -  Seeding depth  -  Surface pressures

Classification code: 632.2 Hydraulic Equipment and Machinery

Hydraulic Equipment and Machinery

  -  731.1 Control Systems

Control Systems

  -  732.1 Control Equipment

Control Equipment

  -  801 Chemistry

Chemistry

  -  821.4 Agricultural Products

Agricultural Products

  -  913.3 Quality Assurance and Control

Quality Assurance and Control

Numerical data indexing: Percentage 3.11e+01%, Percentage 5.63e+01%, Percentage 7.70e+01%, Percentage 9.04e+01%

DOI: 10.6041/j.issn.1000-1298.2018.06.008

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

9. Biomass Estimation of Arbor Forest in Subtropical Region Based on Geographically Weighted Regression Model

Accession number: 20183905870765

Title of translation: 基于地理加权回归模型的亚热带地区乔木林生物量估算

Authors: Wang, Haibin (1); Hou, Ruiping (2); Zheng, Dongmei (2); Gao, Xiuhui (3); Xia, Chaozong (2); Peng, Daoli (1)

Author affiliation: (1) College of Forestry, Beijing Forestry University, Beijing; 100083, China; (2) Academy of Inventory and Planning, State Forestry Administration, Beijing; 100714, China; (3) Institute of Telecommunication Satellite, China Academy of Space Technology, Beijing; 100094, China

Corresponding author: Peng, Daoli(dlpeng@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 184-190

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Accurate estimation of arbor forest biomass is of great significance for the study of forest ecological function and carbon storage. Because of the spatial heterogeneity of the survey factors, the geographically weighted regression method can estimate the local regression of variables and show a good application advantage. Based on the survey data of carbon sinks in Zhejiang Province, taking the biomass of arbor forest (including aboveground and belowground biomass) as dependent variable and factors with high correlation with dependent variable as the explanatory variables, the biomass of arbor forest was estimated by using the geographically weighted regression and co-Kriging methods and compared the accuracy of the two estimation methods. The results showed that the accuracy of arbor forest biomass estimation model (Radj2 was 0.820 4, RMSE was 23.021 5 t/hm2) constructed by geographically weighted regression method was better than that of co-Kriging method (Radj2 was 0.726 3, RMSE was 28.054 9 t/hm2). The coefficient of variation (Cv was 0.618 9) of the prediction value of biomass of arbor forest using geographically weighted regression method was higher than that of the co-Kriging method (Cv was 0.585 4). Because of considering the local variation of the estimated variables, the geographically weighted regression method had better fitting results than co-Kriging method, and the prediction accuracy was high. This study can provide a reference for estimating the forest biomass and other forest parameters in a wide range of tree stands by using the geographically weighting regression method. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Regression analysis

Controlled terms: Biomass  -  Digital storage  -  Estimation  -  Forestry  -  Interpolation  -  Surveys  -  Tropics

Uncontrolled terms: Arbor forest  -  Co-Kriging  -  Coefficient of variation  -  Ecological functions  -  Explanatory variables  -  Geographically weighted regression  -  Geographically weighted regression models  -  Spatial heterogeneity

Classification code: 443 Meteorology

Meteorology

  -  722.1 Data Storage, Equipment and Techniques

Data Storage, Equipment and Techniques

  -  921 Mathematics

Mathematics

  -  921.6 Numerical Methods

Numerical Methods

  -  922.2 Mathematical Statistics

Mathematical Statistics

DOI: 10.6041/j.issn.1000-1298.2018.06.021

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

10. Effects of Carbon-Nitrogen Absorption, Soil Respiration and Yield of Rice under Water and Fertilizer Management Modes

Accession number: 20183905870778

Title of translation: 水氮管理模式下水稻碳氮吸收, 土壤呼吸与产量效应

Authors: Zheng, Ennan (1, 2); Yang, Hua (1, 2); Chen, Peng (1, 2); Zhang, Zhongxue (1, 2)

Author affiliation: (1) School 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

Corresponding author: Zhang, Zhongxue(zhangzhongxue@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 287-295

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Under the field experiment, two kinds of water management models were set up for controlling irrigation and flooding irrigation, and six nitrogen fertilizer levels of 0 kg/hm2, 60 kg/hm2, 85 kg/hm2, 110 kg/hm2, 135 kg/hm2 and 160 kg/hm2 were set up to study the effects of different nitrogen fertilizer and water regulation on carbon and nitrogen content and soil respiration in rice, at the same time, the rice yield of different treatments was determined to provide the countermeasure for the water and fertilizer pattern in cool area. The results showed that the content of carbon and nitrogen in different organs of rice and the soil respiration with control irrigation were larger than those with flood irrigation. The change of carbon content in different organs was similar but inconsistent, compared with control, with the increase of nitrogenous fertilizer, the amplitude of fluctuation was not significant (P>0.05). The results showed that with the increase of nitrogen fertilizer, the content of nitrogen were increased in different organs, that of the 135 kg/hm2 and 160 kg/hm2 treatments were significantly higher than that of other treatments (P2 and 160 kg/hm2 treatments was significantly smaller than that of other treatment (P2 treatment under two kinds of water treatment conditions was higher than that under other nitrogen fertilizer treatments. Under the precondition of considering yield synthetically, C110 treatment was the best coupling model of water and fertilizer, which should be paid attention to. The research result can provide scientific support for water saving and nitrogen reduction in the cold region of Heilongjiang Province. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 37

Main heading: Nitrogen fertilizers

Controlled terms: Carbon  -  Floods  -  Forestry  -  Irrigation  -  Soils  -  Water absorption  -  Water conservation  -  Water treatment

Uncontrolled terms: Carbon and nitrogen  -  Fertilizer management  -  Rice  -  Soil respiration  -  Yield

Classification code: 444 Water Resources

Water Resources

  -  445.1 Water Treatment Techniques

Water Treatment Techniques

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  802.3 Chemical Operations

Chemical Operations

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821.3 Agricultural Methods

Agricultural Methods

DOI: 10.6041/j.issn.1000-1298.2018.06.034

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

11. Delineation of High-standard Farmland Construction Priority Area Based on Matter Element Model

Accession number: 20183905870763

Title of translation: 基于物元模型的高标准农田建设优先区划定方法

Authors: Zhao, Dongling (1); Lin, Shangwei (1); Zhang, Ying (2); Zhou, Zhenxu (1); Du, Zhenbo (1); Yang, Jianyu (1, 3)

Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) College of Automotive and Information Engineering, Taizhou Vocational College of Science and Technology, Taizhou; 318020, China; (3) Key Laboratory for Agricultural Land Quality Monitoring and Control, Ministry of Land and Resources, Beijing; 100035, China

Corresponding author: Yang, Jianyu(ycjyyang@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 167-175

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The construction of high standard farmland is of great significance to the development of modern agriculture, ensure food security and promote the sustainable development of rural areas. It is an important prerequisite for the construction of high standard farmland by scientifically and rationally delimiting the sequence of priority areas. Taking Zhuozhou City of Hebei Province as an example, from four aspects of cultivated land site conditions, infrastructure, spatial layout and ecological protection, an evaluation index system of high standard farmland construction condition was constructed. Using the analytic hierarchy process (AHP) to evaluate the indexes of each index and comprehensively evaluate the construction conditions of high standard farmland. The matter-element model was applied to calculate the comprehensive correlation degree of each evaluation condition. Through the factor combination method, the limits of limiting factors in each evaluation unit were found, the Zhuozhou high standard farmland construction priority area was finally divided into four grades. The results showed that the construction conditions of high standard farmland in Zhuozhou City was good as a whole, the proportion of the grade 1 of priority construction was 17.58%, the proportion of grade 2 area suitable for adjustment was 48.60%, the area ratio of grade 3 area in the key construction was 32.70%, and the area ratio of reserve regulation area was 1.12%. Grade 1 and grade 2 region showed obvious outward from the center of the diffusion trend and spatial distribution had a strong continuity, suitable for large-scale, high standard farmland construction. The grade 3 area was distributed in the west of Zhuozhou City, the level of restriction factors was high and the number was large, it was a difficult area to build, and the distribution of the grade 4 was less. The research results can provide reference for the reasonable delimit and result verification of high standard farmland construction priority area. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 25

Main heading: Farms

Controlled terms: Analytic hierarchy process  -  Construction  -  Food supply

Uncontrolled terms: Grid  -  High standards  -  Limiting factor  -  Matter-element model  -  Priority area delimit

Classification code: 405 Construction Equipment and Methods; Surveying

Construction Equipment and Methods; Surveying

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  822.3 Food Products

Food Products

  -  961 Systems Science

Systems Science

Numerical data indexing: Percentage 1.12e+00%, Percentage 1.76e+01%, Percentage 3.27e+01%, Percentage 4.86e+01%

DOI: 10.6041/j.issn.1000-1298.2018.06.019

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

12. Optimization and Experiment of Fertilizer Particle Motion Model in Conical Spreading Disk

Accession number: 20183905870754

Title of translation: 锥形撒肥圆盘中肥料颗粒运动模型优化与试验

Authors: Lü, Jinqing (1); Sun, He (1); Dui, Han (1); Li, Zihui (1); Li, Jicheng (1); Yu, Jiayu (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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 85-91 and 111

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: At present, there are few theoretical and analytical models of tapered fertilization disc in China, which cannot reach the ideal width, and the uniformity of throwing fertilization is poor. A model of the movement of fertilizer particles on a conical fertilizing disk and in air was established. Considering the influence of rotation of fertilizer particles in the whole movement process, the absolute velocity of fertilizer granules moving to the edge of the vane was analyzed, and the three-dimensional coordinate system which was thrown into the air from the edge of the vane was established. The law of movement of fertilizer particles to the air was analyzed. The main factors influencing the movement of fertilizer particles were obtained, and then the main influential factors that affected the throwing distance and throwing uniformity were obtained. These influencing factors involved the movement parameters and structural parameters, including vane length, vane inclination and disc speed. After determining these influencing factors, coefficient of variation was elected as test index, a static bench experiment was carried out by the orthogonal experiment plan, which was conducted in the Engineering College of Northeast Agricultural University in early October 2017. Static experiment referred to International Organization for Standardization (ISO) 5690 and American Society of Agricultural Engineers (ASAE) S341.2. Static test used two-dimensional collection matrix method. The collection matrix area consisted of 253 boxes, each collecting box had external dimensions of 20 cm×20 cm×10 cm and its thickness was 4 mm. The experimental results were obtained in data processing, the results showed that the influencing factors were all significant. When the length of the blade was 145 mm, the inclination angle of the vane was 0° and the rotating speed of the disc was 1 200 r/min, the horizontal coefficient of variation of throwing was 5.80%, which met the requirements of throwing fertilizers. The research can improve the fertilization efficiency of potato and provide a theoretical reference for the design and optimization of potato manure spreader. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 28

Main heading: Fertilizers

Controlled terms: Agriculture  -  Air  -  Data handling  -  Particles (particulate matter)

Uncontrolled terms: Coefficient of variation  -  Design and optimization  -  Engineering colleges  -  International organization for standardizations  -  Motion modeling  -  Orthogonal experiment  -  Structural parameter  -  Three dimensional coordinate system

Classification code: 723.2 Data Processing and Image Processing

Data Processing and Image Processing

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  951 Materials Science

Materials Science

Numerical data indexing: Percentage 5.80e+00%, Rotational_Speed 1.20e+03RPM, Size 1.45e-01m, Size 4.00e-03m

DOI: 10.6041/j.issn.1000-1298.2018.06.010

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

13. Yield and Nitrogen Utilization of Winter Wheat under Different Nitrogen Application Frequencies with Sprinkler Irrigation System

Accession number: 20183905870777

Title of translation: 不同喷灌施氮频率下冬小麦产量和氮素利用研究

Authors: Cai, Dongyu (1); Zhou, Lili (1); Gu, Tao (2); Yan, Haijun (1)

Author affiliation: (1) College of Water Resources and Civil Engineering, China Agricultural University, Beijing; 100083, China; (2) China Irrigation and Drainage Development Center, Beijing; 100054, China

Corresponding author: Yan, Haijun(yanhj@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 278-286

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In 2014-2015 and 2015-2016, a field experiment was conducted at Tongzhou Experimental Station of China Agricultural University, Beijing, to study the effects of nitrogen application frequencies on the yield and nitrogen utilization of winter wheat under fertigation with a center pivot system. The experiment set one time at jointing stage (T1), two times at jointing and filling stages (T2), three times at recovering, jointing and filling stages (T3), and four times at recovering, jointing, flowering and filling stages (T4), with consistency of irrigation and nitrogen rates during the whole growth period of winter wheat. The effects of nitrogen application frequencies on yield, ground biomass, plant nitrogen utilization, the grain protein content of winter wheat and the dynamic variation of soil nitrate content were evaluated. The two-year results showed that nitrogen application frequencies had a significant effect on the yield of winter wheat and the treatment T4 obtained the highest yield (9 128.5 kg/hm2 and 9 092.3 kg/hm2, respectively). No significant differences existed in total biomass of winter wheat between nitrogen application frequencies, while the distribution of biomass was affected significantly by nitrogen application frequencies in different growth periods. The treatment T4 greatly increased the harvest index, protein yield and nitrogen partial factor productivity of winter wheat. The soil nitrate content in depth of 0~40 cm exceeded the average value when nitrogen was applied with low rates and high frequency during the whole growth period of winter wheat. Comprehensively, the fertilizer management of adopting base fertilizer and nitrogen application of treatment T4 was suggested during the growth period of winter wheat under center pivot irrigation system. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 34

Main heading: Nitrogen fertilizers

Controlled terms: Biomass  -  Crops  -  Ecology  -  Filling  -  Nitrates  -  Proteins  -  Sprinkler systems (irrigation)

Uncontrolled terms: Center pivot  -  Fertigations  -  Nitrogen utilization  -  Winter wheat  -  Yield

Classification code: 454.3 Ecology and Ecosystems

Ecology and Ecosystems

  -  691.2 Materials Handling Methods

Materials Handling Methods

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  821.4 Agricultural Products

Agricultural Products

Numerical data indexing: Size 0.00e+00m to 4.00e-01m

DOI: 10.6041/j.issn.1000-1298.2018.06.033

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

14. Design and Experiment of Control System for Automatic Transplanter Picking up and Spacing Casting Whole Row of Seedlings

Accession number: 20183905870753

Title of translation: 自动移栽机整排取苗间隔投苗控制系统设计与试验

Authors: Hu, Jianping (1, 2); Chang, Hang (1); Yang, Lihong (1); Han, Lühua (1, 2); Mao, Hanping (1, 2); Zhang, Siwei (1)

Author affiliation: (1) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang; 212013, China; (2) Key Laboratory of Agricultural Equipment and Intelligent High-tech Research, Zhenjiang; Jiangsu Province; 212013, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 78-84

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Based on programmable controller PLC, a kind of control system that can pick up a row of tray seedlings and alternately cast tray seedlings was designed, it can be used for self-designed automatic transplanting machine and solving the problem of high precision and difficult coordination of the automatic transplanting machine. In order to reduce the inner damage of seedlings, the control system detects the status of picking process by three travel switches I1, I2 and I3 to make the picking seedling claws gradually stretching in inserting process. Using the photoelectric sensor to detect the position and quantity of seedling cups, and obtain its motion displacement by incremental encoder, therefore, the seedling pot was shot at the best casting place by their combination. Using 20 d cucumber seedlings in 72-holes and 128-holes seedling trays respectively, the experiments were conducted to test picking and casting performance of the control system. The results showed that if the planting frequency was between 40 and 70 plants per minute, the success rate of picking and casting was more than 95%, with average value of 97.98%. As the increase of planting frequency, the success rate dropped but changed a little, which proved that the autonomous designed control system can be used in different seedling trays and planting frequencies, achieving the goal of high-efficiency transplanting. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Control systems

Controlled terms: Agricultural machinery

Uncontrolled terms: Automatic transplanter  -  Average values  -  High-efficiency  -  Incremental encoder  -  Photoelectric sensors  -  Picking up  -  Spacing casting seedlings  -  Transplanting machine

Classification code: 731.1 Control Systems

Control Systems

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

Numerical data indexing: Percentage 9.50e+01%, Percentage 9.80e+01%

DOI: 10.6041/j.issn.1000-1298.2018.06.009

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

15. Numerical Simulation and Test of Wind Performance of Gas Spray Nozzle for Orchard Air-assisted Sprayer

Accession number: 20183905870749

Title of translation: 果园风送喷雾机气助式喷头风力性能数值模拟与试验

Authors: Yang, Fengbo (1); Zhang, Ling (1); Xue, Xinyu (1); Jin, Yongkui (1); Chen, Chen (1); Sun, Tao (1)

Author affiliation: (1) Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing; 210014, China

Corresponding author: Zhang, Ling(1173348176@qq.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 38-47

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming at the problem of weak wind power performance of straight gas-assisted nozzle, the effects of nozzle tail parameters on the flow wind power performance of new “tail first contraction and then expansion” pneumatic nozzle were studied with the combination of single point wind speed test and numerical simulation. The three dimensional numerical model was established for the pneumatic nozzle based on the Reynolds averaged N-S equation and realizable turbulence model, and the correctness and validity of computational fluid dynamics (CFD) model were also verified by the wind speed test. Secondly, the wind performance of two types of nozzles was compared by numerical calculation. The results showed that outlet average wind speed was 1. 36 times of the straight nozzle when the total inlet pressure was 105 600 Pa and the static pressure was 105 200 Pa. In order to study the effect of the tail parameters (the retract length of the convergent section and the height of the expansion section) on the wind performance of new type nozzle, the agent mathematical models were established by the optimal Latin hypercube design and radial basis function neural network (RBFNN), thus greatly facilitating the automatic modeling and compensating for the large amount of calculation for CFD. The R2-variance of outlet flow and outlet average wind speed were 0.983 54 and 0.987 28, respectively, the agent mathematical model could be used for performance prediction and guiding the scientific configuration of structure parameters. The intelligent decision and optimization research of the influence factors were researched based on agent mathematical model. With the increase of the height of expansion and increase of retract length, the average wind speed at the outlet end showed a downward trend, while the flow rate showed a trend of first increase and then decrease. The air flow reached the maximum value of 0.017 9 kg/s when the height of the expansion section was 1.08 mm and the retract length of contraction in convergent section was 5.39 mm; the average wind speed reached the maximum value of 67.9 m/s when the height of the expansion section was 0 mm and the retract length of contraction in convergent section was 0 mm. Multi-objective optimization was made, the optimal Pareto set solution of the wind performance parameters were obtained, which provided a diversified reference for optimization match design of pneumatic nozzle and orchard. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Spray nozzles

Controlled terms: Computational fluid dynamics  -  Computer simulation  -  Expansion  -  Experiments  -  Functions  -  Multiobjective optimization  -  Navier Stokes equations  -  Nozzle design  -  Numerical models  -  Orchards   -  Pneumatics  -  Radial basis function networks  -  Rhenium compounds  -  Speed  -  Turbulence models  -  Two phase flow  -  Wind effects  -  Wind power

Uncontrolled terms: Air-assisted sprayer  -  Computational fluid dynamics modeling  -  Optimal latin hypercube designs  -  Optimization researches  -  Pneumatic nozzles  -  Power performance  -  Radial basis function neural networks  -  Three-dimensional numerical modeling

Classification code: 443.1 Atmospheric Properties

Atmospheric Properties

  -  615.8 Wind Power (Before 1993, use code 611 )

Wind Power (Before 1993, use code 611 )

  -  631.1 Fluid Flow, General

Fluid Flow, General

  -  632.3 Pneumatics

Pneumatics

  -  723.5 Computer Applications

Computer Applications

  -  821.3 Agricultural Methods

Agricultural Methods

  -  901.3 Engineering Research

Engineering Research

  -  921 Mathematics

Mathematics

  -  951 Materials Science

Materials Science

Numerical data indexing: Pressure 1.05e+05Pa, Pressure 1.06e+05Pa, Size 0.00e+00m, Size 1.08e-03m, Velocity 6.79e+01m/s

DOI: 10.6041/j.issn.1000-1298.2018.06.005

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

16. Automatic Mobility Analysis of Parallel Mechanisms Based on Geometric Algebra

Accession number: 20183905870792

Title of translation: 基于几何代数的并联机构自由度自动化分析

Authors: Du, Juan (1); Wu, Hongtao (1); Yang, Xiaolong (1); Li, Yao (1)

Author affiliation: (1) College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing; 210016, China

Corresponding author: Wu, Hongtao(mehtwu@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 400-407 and 417

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Analyzing mobility of parallel mechanisms digitally and automatically is the foundation of automatic type synthesis of parallel mechanisms. The mobility of parallel mechanisms was analyzed automatically based on R(3, 3) geometric algebra model, which was a R6 geometric algebra model. Firstly, since any screw can be represented by a known screw with rigid body transformations, and the rigid body transformations can be derived by the geometric relationship between the two screws, when the twists of the first joints of the limbs were known, all twists of limbs of a parallel mechanism can be symbolically expressed and automatically computed by the geometric relationships between the joints of limbs. Then, since the motion of the limb was the union of all twists of joints and the motion of the moving platform was the intersection of all motion of limbs, by taking the advantages that the geometric algebra had the representations of the intersection set and union set, the motion of all limbs and the moving platform can also be symbolically expressed and automatically computed. Moreover, the symbolic expression of the motion of moving platform was exactly the moblity of the parallel mechanism. And the degree of a parallel mechanism was given by the blade of the symbolic expression. Finally, some examples were discussed in details by using the C++ coding to verify the proposed algorithm. The algorithm that analyzing the mobility of parallel mechanisms automatically based on geometric algebra did not need to compute the constraint twists of limbs and solve linear equations, which made this algorithm faster and more efficiency. This algorithm set the stage for automatic type synthesis of parallel mechanism. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Mathematical transformations

Controlled terms: Algebra  -  Automation  -  C++ (programming language)  -  Carrier mobility  -  Geometry  -  Joints (anatomy)  -  Mechanisms  -  Rigid structures  -  Screws

Uncontrolled terms: Geometric Algebra  -  Geometric relationships  -  Mobility analysis  -  Moving platform  -  Parallel mechanisms  -  Rigid body transformation  -  Symbolic expression  -  Type synthesis

Classification code: 408 Structural Design

Structural Design

  -  461.3 Biomechanics, Bionics and Biomimetics

Biomechanics, Bionics and Biomimetics

  -  601.3 Mechanisms

Mechanisms

  -  605 Small Tools and Hardware

Small Tools and Hardware

  -  712.1 Semiconducting Materials

Semiconducting Materials

  -  723.1.1 Computer Programming Languages

Computer Programming Languages

  -  731 Automatic Control Principles and Applications

Automatic Control Principles and Applications

  -  921 Mathematics

Mathematics

DOI: 10.6041/j.issn.1000-1298.2018.06.048

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

17. Design and Test of Potato Combine Seeder with Throwing and Covering Soil on Film Edge

Accession number: 20183905870759

Title of translation: 抛扬式膜际覆土马铃薯播种联合作业机设计与试验

Authors: Shi, Linrong (1); Yang, Xiaoping (1); Zhao, Wuyun (1); Sun, Wei (1); Li, Rongbin (2); Sun, Bugong (1)

Author affiliation: (1) School of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou; 730070, China; (2) Jiuquan Zhulong Agricultural Machinery Co., Ltd., Jiuquan; 735000, China

Corresponding author: Sun, Wei(sunw@gsau.edu.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 129-137

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In the light of lower qualification rate of sowing depth and poorer quality of film edge covered with soil that the traditional potato combine seeders had, and according to characteristics of mechanized covering soil in the northwest dry farming areas and requirements of potato planting with mulching in Hexi Corridor, potato combined seeder machine with imitated terrain which had the integration of rotary tillage, sowing profiling ability of fertilizing, ridging, seeding, mulching and film edge covered soil was designed. To reduce impact on seeding depth in the process of wheel walking, using linkage principle the position of opener installed in the rack was calculated. In virtue of EDEM software parameters of chain structure were optimized with the simulation experiment of two factors and three levels, and the maximum diameter of chain was 77 mm, and depth of one was 25.5 mm. The amount of soil covered was calculated by relative motion to improve the quality of covering amount of soil. The height of the back end of the shovel was 70 mm, and the velocity of the rotation angle of the blade was 4 rad/s, the radius of the impeller was 230 mm, increasing the breaking soil performance of the impeller. Test results showed that when the operation speed of overall unit was 0.69 m/s, qualified index of throwing and covering soil on film edge was 88.6%, missed index was 5.3%, replay index was 6.1%, the planting depth qualified rate was 90.4%, seed spacing qualified index was 89.4%, which met the agricultural industry standard requirement. Angle between inter film soil and ground was 65.3°, which met the requirement of potato planting and mulching in the western corridor of Gansu. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Soils

Controlled terms: Chains  -  Combines  -  Computer software  -  Depth profiling  -  Design  -  Impellers  -  Seed  -  Testing

Uncontrolled terms: Agricultural industries  -  Design and tests  -  Film edge  -  Potato  -  Relative motion  -  Seeder  -  Software parameters  -  Soil performance

Classification code: 483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  601.2 Machine Components

Machine Components

  -  602.1 Mechanical Drives

Mechanical Drives

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  801 Chemistry

Chemistry

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  821.4 Agricultural Products

Agricultural Products

Numerical data indexing: Angular_Velocity 4.00e+00rad/s, Percentage 5.30e+00%, Percentage 6.10e+00%, Percentage 8.86e+01%, Percentage 8.94e+01%, Percentage 9.04e+01%, Size 2.30e-01m, Size 2.55e-02m, Size 7.00e-02m, Size 7.70e-02m, Velocity 6.90e-01m/s

DOI: 10.6041/j.issn.1000-1298.2018.06.015

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

18. Repairing Method of Missing Area of Dairy Cows’ Point Cloud Based on Improved Cubic B-spline Curve

Accession number: 20183905870770

Title of translation: 基于改进三次B样条曲线的奶牛点云缺失区域修复方法

Authors: He, Dongjian (1, 2); Niu, Jinyu (1, 3); Zhang, Ziru (1, 2); Guo, Yangyang (1, 2); Tan, Yi (1, 3)

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, Yangling; Shaanxi; 712100, China; (3) Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent Service, Yangling; Shaanxi; 712100, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 225-231

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The dimensional and size information contained in the 3D point cloud of dairy cows are of great importance to the body evaluation, size measurement and health assessment. While capturing the point cloud of dairy cows from the aisle between the dairy farm and the milking parlor, the missing area on the point cloud happens frequently, which greatly affects the accuracy of the three-dimensional modeling of the dairy cows and the extraction of body size parameters. In order to fix the large missing area on the point cloud, a cubic B-spline curve based method was proposed to repair it. Firstly, the surrounding background was removed from the dairy cow’s point cloud acquired by Kinect v2. Then, the extracted dairy cow’s point clouds were sliced and projected along the x-axis direction of the point cloud coordinate system. In each slice points, some points were filled in the adjacent points with larger spacing. Finally, cubic B-spline curves were used for fitting the filled slice points. The optimal values of parameters h and L were analyzed in the experiment, and a total of 225 frames of 45 Holstein dairy cows’ point clouds were repaired by using the optimal values of parameters h and L. The results showed that the average frame approximation error was reduced by 26.7%, and the large missing area on the point clouds was repaired and the sparseness of point clouds was also improved. The proposed algorithm had better uniformity and approximation performance than the cubic B-spline method, which provided an effective method for repairing large missing point cloud area. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 25

Main heading: Curve fitting

Controlled terms: Approximation algorithms  -  Interpolation  -  Optimal systems  -  Repair  -  Three dimensional computer graphics

Uncontrolled terms: 3D point cloud  -  Cubic b-spline curves  -  Dairy cow  -  Fitting  -  Hole repairing

Classification code: 723.2 Data Processing and Image Processing

Data Processing and Image Processing

  -  913.5 Maintenance

Maintenance

  -  921 Mathematics

Mathematics

  -  921.6 Numerical Methods

Numerical Methods

  -  961 Systems Science

Systems Science

Numerical data indexing: Percentage 2.67e+01%

DOI: 10.6041/j.issn.1000-1298.2018.06.026

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

19. Experimental Investigation of Light Quality Attributes of Locusts Visual Sensitivity Response to Stimulation Effect of Different Polarized Blue Light

Accession number: 20183905870772

Title of translation: 蝗虫对蓝波谱不同偏光属性刺激效应的视偏响应效应测定

Authors: Liu, Qihang (1); Kong, Xiaohong (1); Fu, Sufang (1); Du, Jiaxi (1); Zhou, Qiang (2)

Author affiliation: (1) School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang; 453003, China; (2) College of Engineering, China Agricultural University, Beijing; 100083, China

Corresponding author: Zhou, Qiang(zq@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 239-245

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To determine the visual response effect of locust inspired by different light properties of blue light, and obtain the stimulating mechanism and the polarized light induction information for locust to manufacture locust induction light source, based on the investigated experiment of swarm locusts visual stimulation response to different blue light properties, the physical characteristics of light energy required by locusts phototaxis and polarotaxis response were analyzed to obtain the influencing factors of light wave information. The results showed that the polarization effect of linearly polarized blue light determined the vector sensitivity of locusts visual response degree and linear polarized illumination restricted locusts visual tendency intensity and visual aggregation effect, and the visual stimulation of linear polarized light quality formed by polarizer in the weaker blue light was better, while depolarized blue light intensity decided the visual stimulation of locusts visual tendency intensity and the visual sensitivity of locusts visual aggregation effect, polarization degree and E-vector illumination presented the interaction effect intensifying or inhibiting locusts sensitive response to depolarized blue light. Meanwhile, enhancing the linear polarized and depolarized illumination inhibited locusts visual aggregation effect for the stronger depolarized illumination, emerging vector sensitive response difference of polarized E-vector, the visual response degree of the weaker linear polarized light and depolarized 0° vector light was superior, and the coupling vertical streaks with polarized light were used to intensify the stimulation of polarized light information and lower the polarized light illumination optimizing polarized light induction information, which was relative to 100 lx polarized light, incited the change of the sensitive E-vector, and its 120° vector sensitivity was stronger, but when illumination was 10 lx, visual tendency intensity and visual aggregation effect of 330° depolarized light was optimal. Moreover, locusts visual tendency intensity and visual aggregation effect of depolarized light had positive and negative correlation with polarization degree along with visual stimulation information, and polarized light illumination respectively, and locust visual response effect on 10 lx polarized light presented the change law of sine and cosine functions response to vector change, indicating locusts had E-vector polarization response pattern and vector function with the maximum activation of visual polarization nerve, and then the coupling effect of 30° and 330° of 10 lx depolarized blue light and 100 lx linear polarized light or 0° of 10 lx depolarized blue light were utilized to improve locusts visual response effect effectively. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Light

Controlled terms: Cosine transforms  -  Depolarization  -  Light polarization  -  Light sources  -  Vectors

Uncontrolled terms: Experimental investigations  -  Light quality  -  Linear polarized illumination  -  Linear polarized light  -  Locusta migratoria  -  Physical characteristics  -  Visual sensitivity  -  Wave spectra

Classification code: 741.1 Light/Optics

Light/Optics

  -  921.1 Algebra

Algebra

  -  921.3 Mathematical Transformations

Mathematical Transformations

Numerical data indexing: Illuminance 1.00e+01lx, Illuminance 1.00e+02lx

DOI: 10.6041/j.issn.1000-1298.2018.06.028

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

20. Cooperative Wind Field Data Acquisition Based on Unmanned Aerial Vehicle Flight Status Modelling for Agricultural Chemical Applications

Accession number: 20183905870773

Title of translation: 基于状态预测的田间机-地传感器系统协同采集方式研究

Authors: Li, Jiyu (1, 2); Lan, Yubin (1, 2); Shi, Yeyin (3); Zhang, Yali (1, 2); Ouyang, Fan (1, 2); Chen, Shengde (1, 2)

Author affiliation: (1) College of Engineering, South China Agricultural University, Guangzhou; 510642, China; (2) National Center for International Collaboration Research on Precision Agricultural Aviation Pesticide Spraying Technology, Guangzhou; 510642, China; (3) Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln; NE; 68583, United States

Corresponding author: Lan, Yubin(ylan@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 246-253 and 277

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To study the wind field pattern created by unmanned aerial vehicles (UAVs) in agricultural chemical applications, triggering the wind speed sensors distributed in crop canopy along the flight path simultaneously when the UAV passes over each of them is critical in capturing the instantaneous wind field data. However, in many cases the measurements were triggered manually by human vision which reduced the timeliness and validity of the data. The data acquisition triggering method was improved and automated for wind speed sensors by predicting the exact UAV flyover timing with accurate geo-location information from an onboard Beidou positioning system and the modeling of future flight status based on past flight data given that agricultural UAVs usually operate at low speed and low altitude without overload. Since the weed speed sensors used could only record data for five seconds, a flight status prediction model was developed to determine the triggering timing for data acquisition based on the consistency and stability of the flight direction, speed, and altitude within a certain period of time. Extensive field experiments were conducted, and the model predicted and wind speed sensor measured maximum wind speed data were compared. No significant difference was found between them at a 99% confidence interval with a P-value of 0.956. With the improved triggering timing, the averaged maximum wind speed in X, Y, Z axes occurred at 3.036 s, 2.427 s and 3.145 s, respectively, of the five-second logging period with standard deviations of 0.79 s, 0.87 s and 0.98 s, respectively. The maximum wind speed, which corresponded to the wind speed when the UAV flew over each sensor, measured by the improved data acquisition system was ensured to be captured now within the five-second optimal logging period of the wind speed sensors by the improved aerial-and-ground-sensor cooperative sensing system. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Wind

Controlled terms: Agricultural chemicals  -  Agriculture  -  Antennas  -  Data acquisition  -  Forecasting  -  Radio navigation  -  Sensors  -  Speed  -  Unmanned aerial vehicles (UAV)

Uncontrolled terms: Confidence interval  -  Consistency and stabilities  -  Cooperative sensing  -  Data acquisition system  -  Plant protection  -  Positioning system  -  State prediction  -  Wind field patterns

Classification code: 443.1 Atmospheric Properties

Atmospheric Properties

  -  652.1 Aircraft, General

Aircraft, General

  -  716.3 Radio Systems and Equipment

Radio Systems and Equipment

  -  723.2 Data Processing and Image Processing

Data Processing and Image Processing

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  821.2 Agricultural Chemicals

Agricultural Chemicals

Numerical data indexing: Percentage 9.90e+01%, Time 2.43e+00s, Time 3.04e+00s, Time 3.15e+00s, Time 7.90e-01s, Time 8.70e-01s, Time 9.80e-01s

DOI: 10.6041/j.issn.1000-1298.2018.06.029

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

21. Droplet Diameter and Kinetic Energy Intensity Distribution Regularities for Sprinkler Irrigation on Sloping Land

Accession number: 20183905870775

Title of translation: 坡地喷灌水滴直径与动能强度分布规律研究

Authors: Zhang, Lin (1); Hui, Xin (2); Chen, Junying (2)

Author affiliation: (1) Institute of Soil and Water Conservation, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China

Corresponding author: Chen, Junying(cjyrose@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 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 diameter and velocity of spray droplet on different slopes under no wind were measured by two-dimensional video disdrometer. The change regularities of average droplet diameter and its cumulative frequency along spray direction under different slopes were studied. The relationship between the average droplet diameter, velocity and slope were established. Based on the calculation method of water distribution, the model for calculating droplet kinetic energy intensity distribution of sprinkler irrigation on sloping land without wind was proposed. The model was validated by experiment. The Rainbird LF1200 sprinkler was selected as the research object, and the influences of sprinkler layout, spacing and slope on the kinetic energy intensity distribution of combined sprinkler were mainly analyzed by the model. The results showed that droplet kinetic energy intensity distribution uniformity and the proportion of high value area of kinetic energy intensity were both decreased as the sprinkler spacing was increased. The effect of slope on kinetic energy intensity distribution was insignificant. Layout of sprinklers with triangular lattice was useful to decrease kinetic energy intensity of the sprinkler on sloping land. If the Rainbird LF1200 sprinkler was used for designing sprinkler irrigation system on sloping land, the sprinkler spacing was recommend as 0.8 times of the spraying range on flat ground with the triangular lattice layout, considering the impact of kinetic energy intensity and water distribution simultaneously. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Kinetics

Controlled terms: Drops  -  Hose  -  Kinetic energy  -  Sprinkler systems (irrigation)  -  Velocity  -  Water supply systems

Uncontrolled terms: Cumulative frequencies  -  Droplet diameters  -  Energy intensity  -  Energy intensity distribution  -  Sloping land  -  Sprinkler irrigation  -  Triangular lattice  -  Water distributions

Classification code: 446.1 Water Supply Systems

Water Supply Systems

  -  619.1 Pipe, Piping and Pipelines

Pipe, Piping and Pipelines

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  931 Classical Physics; Quantum Theory; Relativity

Classical Physics; Quantum Theory; Relativity

DOI: 10.6041/j.issn.1000-1298.2018.06.031

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

22. 15N Tracer-based Analysis of Water and Nitrogen Management Differences in Uptake and Partitioning of N Applied at Different Growth Stages in Transplanted Rice

Accession number: 20183905870780

Title of translation: 15N示踪分析节水灌溉下水稻对不同时期氮肥的吸收分配

Authors: Zhang, Zhongxue (1, 2); Chen, Peng (1, 2); Chen, Shuaihong (1, 2); Zheng, Ennan (1, 2); Nie, Tangzhe (1, 2); Liu, Ming (1, 2)

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

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 309-317 and 346

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to further investigate the uptake of fertilizer-N at different growth stages and in the partitioning of accumulated N in transplanted rice, field experiments were combined with micro-area test, and the traditional flooding irrigation was used as control, three N rates (85 kg/hm2, 110 kg/hm2 and 135 kg/hm2) were set and three 15N-labelled fertilizer application treatments were conducted in rice with different fertilizer-N recovery efficiencies. The fertilizer-N recovery efficiency of total fertilizer was measured, and the fertilizer-N recovery efficiencies of basal, tillering and panicle fertilizations were analyzed by applying 15N-labelled urea as basal, tillering or panicle fertilizer, and comparative study of the two kinds of irrigation fertilizer at different nitrogen utilization rates. The result showed that compared with the traditional flooding irrigation, rice irrigation control model significantly increased dry matter accumulation, nitrogen accumulation and yield of rice, had the “water-saving and high-yield” role. About 16.49%~22.23% of different nitrogen amounts of total nitrogen accumulation in rice under nitrogen fertilizer, the difference between different irrigation methods was not significant; the difference between different irrigation methods was not significant; different nitrogen levels control irrigation rice total fertilizer-N recovery efficiency was 31.82%~36.29%, the fertilizer-N recovery efficiency of basal fertilizer was 10.91%~15.36%, the fertilizer-N recovery efficiency of tillering fertilizer was 34.84%~36.90%, the fertilizer-N recovery efficiency of pancile fertilizer was 55.78%~63.85%. The rice control irrigation mode in addition to fertilizer-N recovery efficiency of basal fertilizer in rice were lower, total, tillering and panicle fertilizer-N recovery efficiency was better than those of the traditional flooding irrigation. The correlation analysis showed that fertilizer-N recovery efficiency of total fertilizer had a significant positive correlation with fertilizer-N recovery efficiency of tillering fertilizer and panicle fertilizer, which provided a reference for further improving the utilization rate of fertilizer nitrogen under controlled irrigation. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 33

Main heading: Nitrogen fertilizers

Controlled terms: Efficiency  -  Floods  -  Irrigation  -  Recovery  -  Trace analysis  -  Urea  -  Water conservation

Uncontrolled terms: Isotope tracers  -  N recoveries  -  N uptakes  -  Rice  -  Water-saving irrigation

Classification code: 444 Water Resources

Water Resources

  -  801 Chemistry

Chemistry

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

  -  821.3 Agricultural Methods

Agricultural Methods

  -  913.1 Production Engineering

Production Engineering

DOI: 10.6041/j.issn.1000-1298.2018.06.036

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

23. Constant Pump Pressure Characteristics in Cam-Plunger High Pressure Fuel System

Accession number: 20183905870791

Title of translation: 凸轮-柱塞高压供油系统等压泵油特性研究

Authors: Liu, Fushui (1, 2); Yang, Ziming (1); Li, Yikai (1); Hu, Ruo (1); Shen, Hongji (3)

Author affiliation: (1) School of Mechanical and Engineering, Beijing Institute of Technology, Beijing; 100081, China; (2) Collaborative Innovation Center for Electric Vehicles, Beijing; 100081, China; (3) 63963 Force, Beijing; 100072, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 393-399

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Cam profile is a key point to the design of high-pressure fuel system. It has a direct influence on the movement of the plunger, which affects the pressure characteristics of the pump. Based on the electronic controlled unit pump (EUP), the dynamic relationship between the cam profile and the pumping pressure was studied by means of experiment and simulation. It was found that within a certain period, the peak pressure was increased with the increase of injection duration using a constant speed cam profile, but the rising rate was decreased with the increase of the injection duration, and the peak pressure tended to be a constant value if the duration was long enough. With deceleration cam profile, the pump can reach approximately constant pumping pressure within common engine injection duration by adopting the dynamic performance in transitional period, in which the pressure was increased firstly and then decreased. In order to evaluate the quality of the constant pressure performance, an evaluation parameter was put forward, which was called constant pressure coefficient, and the influence of the acceleration rate in working section on the constant pressure coefficient was studied. Finally, in order to reach the constant pressure characteristic, a selection method of the optimum cam profile was put forward for different matching speeds. A supply cam profile was designed for a certain engine with a -0.013 mm/(°CA)2 deceleration rate of working section and a good constant pressure characteristic (10~15°CA injection duration) and maximum cycle injection volume (438 mm3) at engine speed of 1 200 r/min were obtained. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Cams

Controlled terms: Diesel engines  -  Fuel injection  -  Fuels  -  Pumps  -  Quality control

Uncontrolled terms: Cam profile  -  Constant pressures  -  Dynamic performance  -  Evaluation parameters  -  Fuel injection systems  -  Injection durations  -  Pressure characteristics  -  Transitional period

Classification code: 601.3 Mechanisms

Mechanisms

  -  612.2 Diesel Engines

Diesel Engines

  -  618.2 Pumps

Pumps

  -  913.3 Quality Assurance and Control

Quality Assurance and Control

Numerical data indexing: Rotational_Speed 1.20e+03RPM, Volume 4.38e-07m3

DOI: 10.6041/j.issn.1000-1298.2018.06.047

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

24. Photosynthetic and Light Response Characteristics of Spring Wheat under Different Irrigation Schedules

Accession number: 20183905870776

Title of translation: 不同灌溉定额下春小麦光合光响应特征研究

Authors: Ma, Li (1); Wang, Quanjiu (2, 3)

Author affiliation: (1) Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province, Baoji University of Arts and Sciences, Baoji; 721013, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling; Shaanxi; 712100, China; (3) Institute of Water Resources, Xi’an University of Technology, Xi’an; 710048, China

Corresponding author: Wang, Quanjiu(wquanjiu@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 271-277

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to explore the adaptation mechanism of spring wheat in arid oasis region habitat, the photosynthetic response of spring wheat was investigated by six irrigation treatments. The four light response models was comparative analysis, including rectangular hyperbolae model, non-rectangular hyperbolae model, exponential model and correction model of rectangular hyperbolae model. Then the optimal model was selected and the photosynthetic characteristics parameters of spring wheat were calculated by the optimal model with different irrigation schedules. The results showed that the photosynthetic performance of wheat leaves was increased by the increase of irrigation quota, and the photosynthetic performance in early stage of filling was greater than the late stage of filling. There was significant difference between the four light response models in different irrigation quotas. The simulate values of higher irrigation treatments were more accurate than those of lower irrigation treatments by rectangular hyperbolae model, non-rectangular hyperbolae model and exponential model. The correction model ofrectangular hyperbolae model had the maximum simulation accuracy by error tests. So it was optimal model to fit light response curves of spring wheat in desert oasis. The photosynthetic parameters showed that maximum net photosynthesis rate (Pmax), apparent quantum efficiency (Q) and light saturation point (Is) of 420 mm treatment were higher than those of others, but the light compensation point (Ic) was decreased significantly. Therefore, the appropriate irrigation treatments can expand the light adaption ranges of spring wheat, improve light energy utilization and promote the increase of yield in desert oasis. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Light

Controlled terms: Energy utilization  -  Forestry  -  Irrigation  -  Landforms  -  Plants (botany)

Uncontrolled terms: Desert oasis  -  Irrigation schedule  -  Light response modeling  -  Photosynthetic characteristics  -  Spring wheat

Classification code: 481.1 Geology

Geology

  -  525.3 Energy Utilization

Energy Utilization

  -  741.1 Light/Optics

Light/Optics

  -  821.3 Agricultural Methods

Agricultural Methods

Numerical data indexing: Size 4.20e-01m

DOI: 10.6041/j.issn.1000-1298.2018.06.032

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

25. Attitude Calculation Method Based on CPF-EKF for Large Load Plant Protection UAV

Accession number: 20183905870747

Title of translation: 基于CPF-EKF算法的大载荷植保无人机姿态解算方法

Authors: Wu, Helong (1, 2); Bai, Yue (1); Pei, Xinbiao (1, 2); Ma, Ping (1, 2); Peng, Cheng (1); Gao, Huibin (1)

Author affiliation: (1) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130033, China; (2) University of Chinese Academy of Sciences, Beijing; 100039, China

Corresponding author: Bai, Yue(baiy@ciomp.ac.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 24-31 and 77

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to solve the shortcomings of traditional artificial spraying pesticides and more efficient prevention and treatment of diseases and pests, a pesticide spraying system based on sixteen-rotor unmanned aerial vehicle (UAV) was designed. The sixteen-rotor UAV’s basic structure and attitude calculation method were explained. The whole system was full of 10 kg, cruising speed can reach 5 m/s, and the flight time was more than 10 min. The traditional extended Kalman filter (EKF) attitude calculation method cannot meet the work requirements under the strong vibration condition of the large load UAV. The attitude angle calculation accuracy was not high and the attitude angle divergence was easily caused. A CPF-EKF algorithm based on 20 dimensional state quantity was proposed. The bias error of gyroscopes, accelerometers and magnetometers were added as the state quantity, which made the optimal estimation of the attitude angle of the three axes more accurate. Complementary filtering (CPF) was treated as an EKF detection module. When the EKF had the divergence trend, the EKF was reset, thus the EKF divergence was avoided simply and efficiently. Using actual flight data to verify the algorithm, the static experiment showed that the precision of the roll angle and the pitch angle of the algorithm were ±0.05°, the precision of the yaw angle was±0.2°. The dynamic experiment showed that the precision of the roll angle and the pitch angle of the algorithm were±0.1°, the precision of the yaw angle was±0.5°, and the algorithm had good real-time performance. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Extended Kalman filters

Controlled terms: Antennas  -  Flight dynamics  -  Pesticides  -  Unmanned aerial vehicles (UAV)

Uncontrolled terms: Actual flight data  -  Calculation accuracy  -  Dynamic experiment  -  Optimal estimations  -  Pesticide spraying  -  Real time performance  -  Static experiments  -  Vibration condition

Classification code: 652.1 Aircraft, General

Aircraft, General

  -  803 Chemical Agents and Basic Industrial Chemicals

Chemical Agents and Basic Industrial Chemicals

Numerical data indexing: Mass 1.00e+01kg, Time 6.00e+02s, Velocity 5.00e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.06.003

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

26. Characteristics of Aerobic-Anaerobic Combined Digestion Process Based on TRIZ Theory

Accession number: 20183905870783

Title of translation: 基于TRIZ理论的秸秆好氧-厌氧联合发酵特性研究

Authors: Luo, Li’na (1); Ding, Qinghua (2); Liu, Xin (1); Gong, Weijia (1); Qin, Liyuan (1); Wang, Hongyan (3)

Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Shandong Bori Bioenergy Co., Ltd., Dongying; 257000, China; (3) College of Resources and Environment, Northeast Agricultural University, Harbin; 150030, China

Corresponding author: Wang, Hongyan(wanghongyanlln@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 332-339

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Anaerobic digestion is a promising technology by which crop straw can be biologically transformed into biogas. However, the efficiency of anaerobic digestion was significantly influenced by the complicated structural resistance from lignocellulose. Therefore, aerobic digestion was used to break down the structure of lignocellulose before anaerobic digestion process. The TRIZ theory was applied to design aerobic-anaerobic combined digestion process of rice straw, and the effects of different aeration modes and addition of fungicides on the fermentation characteristics were studied. The results showed that after aerobic digestion process, the degradation rate of lignocelluloses in each group was increased to some extent. The degradation rate of lignocellulose was the highest in the aerated group added mixed bacteria, and the degradation rates of hemicellulose, cellulose and lignin were 46.3%, 40.4% and 8.2%, respectively. The modified Gompertz equation and the first-order equation could well fit the cumulative methane production, with R2 greater than 0.97. The cumulative methane yield of the aerated group added mixed bacteria in the experiment was 294.38 mL/g, which were 279.58 mL/g and 320. 11 mL/g fitted by two equations, respectively. The calculated methane yield was 424.7 mL/g calculated by the Baswell formula. The test value was about 69% of the theoretical methane yield which was higher to predict methane yield for inert substances such as rice straw. The total VS degradation rates of aerobic exposure group, aerated group added Trichoderma, aerated group added Aspergillus niger, aerated group added mixed bacteria of Trichoderma and Aspergillus niger and mixed group added mixed bacteria of Trichoderma and Aspergillus niger were 15.99%, 35.47%, 37.99%, 54.68% and 40.92% higher than that of direct anaerobic fermentation group, respectively. The effect of aeration was better than that of mixing for oxygen supply. The effect of adding mixed bacteria in aeration process was better than that of adding single bacteria. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 28

Main heading: Anaerobic digestion

Controlled terms: Aerobic bacteria  -  Aspergillus  -  Biodegradation  -  Cellulose  -  Degradation  -  Fermentation  -  Lignin  -  Methane  -  Oxygen supply  -  Problem solving   -  Straw

Uncontrolled terms: Aerobic digestions  -  Anaerobic digestion process  -  Anaerobic fermentation  -  Digestion process  -  First order equations  -  Modified gompertz equations  -  Structural resistance  -  TRIZ theories

Classification code: 461 Bioengineering and Biology

Bioengineering and Biology

  -  802.2 Chemical Reactions

Chemical Reactions

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

  -  811.3 Cellulose, Lignin and Derivatives

Cellulose, Lignin and Derivatives

  -  821.5 Agricultural Wastes

Agricultural Wastes

Numerical data indexing: Percentage 1.60e+01%, Percentage 3.55e+01%, Percentage 3.80e+01%, Percentage 4.04e+01%, Percentage 4.09e+01%, Percentage 4.63e+01%, Percentage 5.47e+01%, Percentage 6.90e+01%, Percentage 8.20e+00%, Specific_Volume 1.10e-02m3/kg, Specific_Volume 2.80e-01m3/kg, Specific_Volume 2.94e-01m3/kg, Specific_Volume 4.25e-01m3/kg

DOI: 10.6041/j.issn.1000-1298.2018.06.039

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

27. Optimization and Experiment on Driving Mechanism of Vibrating Screen with Three Translations and Two Rotations

Accession number: 20183905870760

Title of translation: 三移动两转动振动筛驱动机构优化与试验

Authors: Wang, Lijun (1); Duan, Liangkun (1); Zheng, Zhaohui (1); Cui, Youqiang (1); Li, Yibo (1); Zhao, Huijun (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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 138-145

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Vibrating sieve for corn cleaning is a vital component of corn harvester. To further improve the screening efficiency of corn threshed mixture on the screen, a new type of driving mechanism of vibrating screen for corn cleaning was designed, in which three translations and two rotations of the screen can be realized based on the plane reciprocation mechanism with only two translation. To obtain the motion laws and screening performance of the screen, the displacement equation of any point on the screen were derived by using the closed vector polygon method. The lengths of each drive rod were determined by using optimal design of the software Isight. The optimization objective was that the displacement of the screen in the rear would be minimum. The back amplitudes of the screen optimized was 15.4 mm. Combining Matlab software, the results of numerical simulation showed that the motion of the mechanism was cyclical and not simply harmonic. Comparative experiment was conducted on the new type of driving mechanism and the plane reciprocation mechanism. Sieving rate of corn particles penetrated the sieve with high-speed camera was recorded, under the condition of different speeds of spindle and the mass of corn threshed mixture. In the experiments, the mass percentages of corn kernels, corn stalks, corncob and light mixture were 73.3%, 17.6%, 8. 7% and 0.4%, respectively. The conclusion was drawn that the optimized speed of spindle was 260 r/min when the maximum feed mass was 6 kg/s. The corresponding sieving rate was increased by 5.75% and energy consumption was reduced by 16.1%. The superiority of this new organization was proven. The research result provided a theoretical basis for designing more reasonable cleaning mechanism to improve the production efficiency. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: MATLAB

Controlled terms: Agriculture  -  Cleaning  -  Computer simulation  -  Energy utilization  -  High speed cameras  -  Mixtures  -  Numerical models  -  Optimization  -  Sieves  -  Vibrating screens

Uncontrolled terms: Closed vector polygon methods  -  Comparative experiments  -  Displacement equation  -  Driving mechanism  -  Production efficiency  -  Screening efficiency  -  Screening performance  -  Simple harmonic motion

Classification code: 525.3 Energy Utilization

Energy Utilization

  -  605.1 Small Tools, Powered

Small Tools, Powered

  -  723.5 Computer Applications

Computer Applications

  -  742.2 Photographic Equipment

Photographic Equipment

  -  802.3 Chemical Operations

Chemical Operations

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  921 Mathematics

Mathematics

  -  921.5 Optimization Techniques

Optimization Techniques

Numerical data indexing: Mass_Flow_Rate 6.00e+00kg/s, Percentage 1.61e+01%, Percentage 1.76e+01%, Percentage 4.00e-01%, Percentage 5.75e+00%, Percentage 7.00e+00%, Percentage 7.33e+01%, Rotational_Speed 2.60e+02RPM, Size 1.54e-02m

DOI: 10.6041/j.issn.1000-1298.2018.06.016

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

28. Design and Experiment on V-groove Dialing Round Type Guiding-seed Device

Accession number: 20183905870761

Title of translation: 精量播种机V型凹槽拨轮式导种部件设计与试验

Authors: Zhao, Shuhong (1); Chen, Junzhi (1); Wang, Jiayi (1); Chen, Jiaqi (1); Yang, Chao (1); Yang, Yueqian (1)

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

Corresponding author: Yang, Yueqian(yangyueqian@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 146-158

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: A V-groove dialing round type guiding-seed device was designed to improve the uniformity and stability of planting and meet the requirements of precision planting. The overall structure and working principle of the precision guiding-seed device were illustrated and analyzed. The optimal design of structural parameters of key components was conducted, such as guiding curve, V-groove and dialing round. The interaction model of machinery and maize was established by using discrete element method. The scoop-type metering device was taken as the seeding object and EDEM software was employed to simulate the guiding-seed process. And then the dynamic behaviors of maize were researched under the working conditions. Orthogonal simulation experiments were carried out based on numerical simulation technology with forward speed, rotational speed, tangent angle as experimental factors and with qualified index and coefficient of variation as assessment consumption. Based on experimental data, a mathematical model was built, and the experimental factors were optimized by Design-Expert 6.0. 10 software, the best combination was achieved. The simulation results showed that as the forward speed was 7.69 km/h, rotational speed was 29.47 r/min, tangent angle was 46.10°, and the qualified index was 92.05%, the coefficient of variation was 8.00%, which could meet the requirements of precision planting. On this basis, the high-speed photography experiment, comparison performance experiment and vibration adaptation experiment were carried out. The experimental results showed that the majority of grains were slipping in a steady state in the tube and few irregular impacts and tumbling. The V-groove dialing round type guiding-seed device had better adaptability to different maize grains which could be used in conjunction with scoop-type, pickup finger-type and air suction-type precision seed metering device. Its qualified index was similar to that of unguided tube, and coefficient of variation was higher than those of retractable plastic guide tube, curved guide tube and unguided tube. Under the normal operating conditions (vibration amplitude was 1~3 mm, and vibration frequency was 1~4 Hz), the vibration amplitude and frequency had little effect on the homogeneity of the guided parts. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Seed

Controlled terms: Finite difference method  -  High speed photography  -  Machinery  -  Speed  -  Structural optimization  -  Tubes (components)

Uncontrolled terms: Dialing round  -  Guiding-seed curve  -  Guiding-seed device  -  Precision planting  -  V grooves

Classification code: 619.1 Pipe, Piping and Pipelines

Pipe, Piping and Pipelines

  -  742.1 Photography

Photography

  -  821.4 Agricultural Products

Agricultural Products

  -  921.5 Optimization Techniques

Optimization Techniques

  -  921.6 Numerical Methods

Numerical Methods

Numerical data indexing: Frequency 1.00e+00Hz to 4.00e+00Hz, Percentage 8.00e+00%, Percentage 9.20e+01%, Rotational_Speed 2.95e+01RPM, Size 1.00e-03m to 3.00e-03m, Velocity 2.14e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.06.017

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

29. Influence of Land Use on Water Resources in Plain-Hill-Wetland Blend Area

Accession number: 20183905870774

Title of translation: 土地利用方式对平原-丘陵-湿地交融区水资源的影响

Authors: Gong, Xinglong (1); Fu, Qiang (1); Xing, Zhenxiang (1); Guan, Yinghong (1); Wang, Bin (1); Li, Mo (1)

Author affiliation: (1) College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin; 150030, China

Corresponding author: Xing, Zhenxiang(zxxing@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 254-262

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Land use of plain-hill-wetland blend area in Sanjiang Plain was changed significantly, resulting in the decline of groundwater level and shortage of water resources, while rare research was focused on revealing the effect of land use change on water resources, especially on the temporal and spatial distribution of water resources of surface water and ground water, wetland water and green water. A plain-hill-wetland blend area hydrological model was constructed based on distributed TOPMODEL and wetland flow kinematic model. The land use change and its impact on water resources in Naolihe River Basin was analyzed by using GIS and RS technology, combined with the geo information and spatial autocorrelation method. The results showed that the areas of grassland and woodland in the Naolihe River basin were changed little, while dry land area was decreased slightly according to the change of cultivated land area and dynamic degree distribution between 1990 and 2013; unused land and dry land with advantageous conditions for production was converted to paddy field in the central and northern areas of Naolihe River Basin; The influence of land use change on water resources declined in the order of withdraw water quantity, green water reserves, runoff flow, green water flow, and groundwater recharge; the evaporation capacity of paddy field was different in different rice growth periods, which led to the increase of green water flow, decrease of green water reserves, decrease of runoff flow, increase of groundwater recharge and increase of withdraw water quantity during May and June in Naolihe River Basin. The difference of these items was decreased gradually during July and August, and disappeared after August. Green water flow was increased, green water reserves and runoff flow were decreased, while groundwater recharge and withdraw water quantity were increased in paddy field. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Recharging (underground waters)

Controlled terms: Flow of water  -  Groundwater resources  -  Hydraulics  -  Kinematics  -  Land use  -  Rivers  -  Runoff  -  Solute transport  -  Spatial variables measurement  -  Surface water resources   -  Water resources  -  Watersheds  -  Wetlands

Uncontrolled terms: Degree distributions  -  Evaporation capacity  -  Green water  -  Ground water recharge  -  Hydrological modeling  -  Plain-hill-wetland blend area  -  Spatial autocorrelation methods  -  Temporal and spatial distribution

Classification code: 403 Urban and Regional Planning and Development

Urban and Regional Planning and Development

  -  444 Water Resources

Water Resources

  -  631.1.1 Liquid Dynamics

Liquid Dynamics

  -  632.1 Hydraulics

Hydraulics

  -  931 Classical Physics; Quantum Theory; Relativity

Classical Physics; Quantum Theory; Relativity

  -  931.1 Mechanics

Mechanics

  -  943.2 Mechanical Variables Measurements

Mechanical Variables Measurements

DOI: 10.6041/j.issn.1000-1298.2018.06.030

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

30. Hydrothermal Preparation of Corncob-derived Solid Acid Catalysts under Saline Condition

Accession number: 20183905870784

Title of translation: 玉米芯碳基固体酸含盐氛围水热法制备

Authors: Ma, Huan (1, 2); Yang, Junlei (1, 2); Liu, Weiwei (3); Zhang, Xin (1, 2); Zhu, Suwen (1, 2)

Author affiliation: (1) School of Life Sciences, Anhui Agricultural University, Hefei; 230036, China; (2) National Engineering Laboratory of Crop Stress Resistence, Hefei; 230036, China; (3) School of Engineering, Anhui Agricultural University, Hefei; 230036, China

Corresponding author: Zhu, Suwen(zhusuwen@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 340-346

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Novel corncob-derived solid acid catalysts, which used corncob as a precursor, were successfully synthesized for the first time by hydrothermal method under saline condition. The effects of different preparation parameters on the catalytic activity of the corncob-derived solid acid were investigated by using the esterification reaction of oleic acid with methanol. The structure-function relationships of the resulting catalysts were also discussed in detail on the basis of the analysis of structure and composition. Then, the catalytic activity of the resulting solid acid was investigated by using the esterification reaction of waste cooking oil with high acid value. The results indicated that the presence of ZnCl2 yielded a preferable carbonaceous structure composed of polycyclic aromatic carbon sheets in short carbonization time. Compared with the conventional method, the carbonized rate of corncob under saline conditions was increased by 1 time, which also produced a suitable structure for sulfonation process. The resulting solid acid possessed high SO3H density, which caused 4.5 times higher esterification yield of methyl oleate than the solid acid prepared by conventional hydrothermal method. Moreover, the corncob-derived catalyst synthesized under optimized saline conditions exhibited higher catalytic activity in esterification reactions of waste cooking oil, yielding 90.23% fatty acid methyl ester in only 4 h. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Catalyst activity

Controlled terms: Carbonization  -  Chlorine compounds  -  Esterification  -  Esters  -  Fatty acids  -  Oils and fats  -  Zinc chloride

Uncontrolled terms: Corncob  -  Esterification reactions  -  Fatty acid methyl ester  -  Hydrothermal preparation  -  Saline conditions  -  Solid acid  -  Structure-function relationship  -  Waste cooking oil

Classification code: 802.2 Chemical Reactions

Chemical Reactions

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

Numerical data indexing: Percentage 9.02e+01%, Time 1.44e+04s

DOI: 10.6041/j.issn.1000-1298.2018.06.040

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

31. Dynamic Characteristics Analysis of Radial Flow MR Valve Controlled Cylinder System

Accession number: 20183905870794

Title of translation: 径向流磁流变阀控缸系统动力性能研究

Authors: Hu, Guoliang (1); Zhang, Jiawei (1); Zhong, Fang (1); Yu, Lifan (1)

Author affiliation: (1) Key Laboratory of Conveyance and Equipment, Ministry of Education, East China Jiaotong University, Nanchang; 330013, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 418-426

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Magnetorheological valve (MR) is a typical smart control mechanism that using magnetorheologcial fluid as the working fluid. The advantages of simple operation, fast response, and regulating pressure drop make the MR valve have a promising application prospects in the hydraulic system. In order to broaden the industrial applications of MR valve, a radial flow MR valve controlled cylinder system was proposed, which consisted of a radial flow MR valve, a single rod hydraulic cylinder and an accumulator. The working principle of radial flow MR valve controlled cylinder system was described in detail. The mathematical model of damping force was deduced, and the simulation analysis was also carried out. At the same time, the dynamic test rig was set up to investigate the dynamic performances of the typical and improved radial flow MR valve controlled cylinder systems under different currents, frequencies, and amplitudes. The experimental results showed that radial flow MR valve controlled cylinder system can output a large damping force, and the maximum damping force can reach 5.8 kN. Furthermore, the damping force can be continuously adjusted under different applied currents, and the adjustable range was wide. The effect of piston velocity on the damping force was little, and the system can output stable damping forces under a variety of operating conditions. The comparative analysis of two different valve controlled cylinder systems also showed that different dynamic performance can be obtained by replacing different MR valves. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Radial flow

Controlled terms: Cylinders (shapes)  -  Damping  -  Hydraulic accumulators  -  Hydraulic equipment  -  Mechanisms

Uncontrolled terms: Application prospect  -  Comparative analysis  -  Cylinder systems  -  Dynamic characteristics analysis  -  Dynamic performance  -  Magnetorheological valve  -  Operating condition  -  Smart control mechanisms

Classification code: 601.3 Mechanisms

Mechanisms

  -  631.1 Fluid Flow, General

Fluid Flow, General

  -  632.2 Hydraulic Equipment and Machinery

Hydraulic Equipment and Machinery

  -  931.1 Mechanics

Mechanics

Numerical data indexing: Force 5.80e+03N

DOI: 10.6041/j.issn.1000-1298.2018.06.050

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

32. Design and Experiment of Differential-type Bidirectional Distribution Device for Fertilizer Supply for Deep-fertilizer Liquid Fertilizer Application

Accession number: 20183905870756

Title of translation: 液肥深施机差动式双向供肥分配装置设计与试验

Authors: Wang, Jinwu (1); Zhou, Wenqi (1); Bai, Haichao (1); Wang, Jinfeng (1); Huang, Huinan (1); Wang, Zhongbo (1)

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

Corresponding author: Wang, Jinfeng(jinfeng_w@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 105-111

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming at the problems that low working efficiency and energy loss of liquid fertilizer of distributor for deep-fertilization liquid fertilizer applicator, the differential-type bidirectional distribution device for fertilizer supply that matched pricking hole mechanism for oblique type was designed. In order to avoid the winding of connecting hoses between the differential-type bidirectional distribution device for fertilizer supply and pricking hole mechanism for oblique type, the mechanism transmission principle that consisted of double planetary gears and annular gear was employed, and the transmission ratio of differential-type bidirectional distribution device for fertilizer supply was obtained based on the movement characteristics of spray fertilizer needle hoses couler of pricking hole mechanism for oblique type; the space-cam of differential-type bidirectional distribution device for fertilizer supply was designed to meet the characteristic that spray fertilizer needle sprayed liquid fertilizer, and the structure parameters of device were obtained, i. e., the upon movement angle of space-cam was 31.8°, the down movement angle of space-cam was 25.6°, base circle radius of space-cam was 100 mm and the maximum value of space-cam stroke was 6 mm. The kinematics of double planetary gears was analyzed, and the motion trajectory equation of planetary gears was obtained. The performance experiment of differential-type bidirectional distribution device for fertilizer supply was done. The hose status was recorded between differential-type bidirectional distribution device for fertilizer supply and pricking hole mechanism for oblique type when the device worked at each time interval of 45° rotation, the connecting hoses that did not twine were verified; the pressure of hydraulic pump as the influence factor, the amounts of liquid fertilizer were measured per 5 s at different levels, the flow velocity of injection needle and hydraulic pump outlet were obtained, the rule of energy loss, value of energy loss for the device and the higher efficiency to spray liquid fertilizer of the device were obtained. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Fertilizers

Controlled terms: Cams  -  Energy dissipation  -  Energy efficiency  -  Equations of motion  -  Flow velocity  -  Gears  -  Hose  -  Kinematics  -  Liquids  -  Needles

Uncontrolled terms: Distribution devices  -  Kinematics analysis  -  Liquid fertilizer applicators  -  Liquid fertilizers  -  Movement characteristics  -  Performance experiment  -  Transmission principle  -  Transmission ratios

Classification code: 525.2 Energy Conservation

Energy Conservation

  -  525.4 Energy Losses (industrial and residential)

Energy Losses (industrial and residential)

  -  601.2 Machine Components

Machine Components

  -  601.3 Mechanisms

Mechanisms

  -  619.1 Pipe, Piping and Pipelines

Pipe, Piping and Pipelines

  -  631 Fluid Flow

Fluid Flow

  -  804 Chemical Products Generally

Chemical Products Generally

  -  921.2 Calculus

Calculus

  -  931.1 Mechanics

Mechanics

Numerical data indexing: Size 1.00e-01m, Size 6.00e-03m, Time 5.00e+00s

DOI: 10.6041/j.issn.1000-1298.2018.06.012

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

33. Development and Experiment of Permanent Plot Marking Device for Continuous Forest Inventory

Accession number: 20183905870766

Title of translation: 森林资源连续清查固定样地标记装置设计与试验

Authors: Hu, Yang (1); Sun, Zhongqiu (2); Wu, Fayun (2); Wang, Wei (2); Peng, Daoli (1)

Author affiliation: (1) College of Forestry, Beijing Forestry University, Beijing; 100083, China; (2) Academy of Forestry Inventory and Planning, State Forestry Administration, Beijing; 100714, China

Corresponding author: Peng, Daoli(dlpeng@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: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 191-197

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to solve the problem of finding the fixed plot difficulty for continuous forest inventory, improve the efficiency and reduce the cost, a permanent sample plot marking device was designed based on the principle of remote control alarm and GNSS positioning. The marking device was composed of main program module, positioning decoding module, remote control alarm module, the data transmission module, the sample update information storage module, etc. FreeRTOS operating system was transplanted on Cortex-M3, and C++ was used to carry out most of the functions such as remote control, low frequency positioning etc. For the location of information data transmission, a sample API was developed on the WeChat platform by calling a Baidu map to realize the route planning for general mobile phone users. When the investigators load the APP for searching the plot in a certain area of the marker, the remote alarm would automatically start ringing. Then the location would be sent to the handset, which would help them to find the marker more quickly. Verified by experiments, the efficiency of the marking device was about 324% higher than that of the traditional sample plot. Meanwhile, the device can directly read and write the historical information and real-time monitoring data. It was showed that the equipment can solve problems such as marking device finding difficulties and no history inventory information. Therefore, it can be used and promoted in the permanent plot for continuous forest inventory in the future. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Remote control

Controlled terms: Alarm systems  -  C++ (programming language)  -  Cellular telephone systems  -  Computer software  -  Data transfer  -  Digital storage  -  Efficiency  -  Forestry  -  Telephone sets

Uncontrolled terms: Continuous forest inventories  -  Historical information  -  Information data transmission  -  Inventory information  -  Marking device  -  Navigation technology  -  Permanent sample plots  -  Real time monitoring

Classification code: 718.1 Telephone Systems and Equipment

Telephone Systems and Equipment

  -  722.1 Data Storage, Equipment and Techniques

Data Storage, Equipment and Techniques

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  723.1.1 Computer Programming Languages

Computer Programming Languages

  -  731.1 Control Systems

Control Systems

  -  913.1 Production Engineering

Production Engineering

Numerical data indexing: Percentage 3.24e+02%

DOI: 10.6041/j.issn.1000-1298.2018.06.022

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

34. Effects of Water and Nitrogen Fertilization on Physiological Characteristics and Yield of Cotton under Drip Irrigation in Mildly Salinized Soil

Accession number: 20183905870779

Title of translation: 水氮调控对轻度盐化土滴灌棉花生理特性与产量的影响

Authors: Wang, Zhenhua (1, 2); Zhu, Yankai (1, 2); Zhang, Jinzhu (1, 2); Li, Wenhao (1, 2); Bian, Qingyong (1, 2)

Author affiliation: (1) College of Water and Architectural Engineering, Shihezi University, Shihezi; 832000, China; (2) Key Laboratory of Modern Water-Saving Irrigation of Xinjiang Production and Construction Group, Shihezi University, Shihezi; 832000, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 6

Issue date: June 25, 2018

Publication year: 2018

Pages: 296-308

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming to explore the mild salinization area ratio of different water and nitrogen physiological characteristics, yield and quality of drip-irrigated cotton, the influence of irrigation water use efficiency and nitrogen partial productivity, seek water and nitrogen combination suitable for cotton cultivation in salinization area, and optimize the salinization area for drip irrigation cotton basis, barrels and randomized trials were used, three irrigation levels of 2 750 m3/hm2, 3 750 m3/hm2 and 4 750 m3/hm2 (W1, W2 and W3) and three nitrogen levels of 300 kg/hm2, 600 kg/hm2 and 900 kg/hm2 (N1, N2, and N3, form of nitrogen in urea) were set up in mild saline soil, and the photosynthesis, fluorescence, yield and quality of cotton, water and nitrogen use efficiency and optimal irrigation fertilization mode were investigated. The results showed that mild salt stress under the condition of different water and nitrogen regulations, irrigation water and the interaction of water and nitrogen had significant effects (Pn, Tr and Gs and Ci in the growth period, under the level of W1 and W2, Pn, Tr and Gs were increased with the increase of N application rate and then decreased, and reached the maximum at W2N2 treatment. At the level of W3, it was increased with the increase of N, while Ci showed the opposite trend. The influence of irrigation water on Fv/Fm and Fv/F0 of different growth stages of cotton was not significant (P>0.05), and it had significant influence on qp and NPQ, Y() and ETR (P0.05), and it had significant influence on Fv/Fm and Fv/F0, qp, Y() and ETR (P2; the minimum value appeared in W1N1 treatment, which was 3 483.75 kg/hm2, with a relative increase of 68.05%; through the multiple regression analysis and the likelihood function group, the optimal irrigation water and nitrogen application rate of the mild saline-alkali soil were 3 740 m3/hm2 and 754 kg/hm2, respectively. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 41

Main heading: Saline water

Controlled terms: Cotton  -  Cultivation  -  Efficiency  -  Fluorescence  -  Nitrogen  -  Photosynthesis  -  Physiology  -  Production  -  Regression analysis  -  Soils   -  Subirrigation  -  Urea  -  Water supply

Uncontrolled terms: Chlorophyll fluorescence parameters  -  Irrigated cotton  -  Irrigation water use efficiency  -  Multiple regression analysis  -  Nitrogen application rates  -  Nitrogen regulation  -  Physiological characteristics  -  Saline soil

Classification code: 444 Water Resources

Water Resources

  -  446.1 Water Supply Systems