2018年第7期共收录52篇

1. Design and Experiment of Electric Control Double Row Deep Fertilizing Weeder in Paddy Field

Accession number: 20184506044385

Title of translation: 水田电动双行深施肥除草机设计与试验

Authors: Wang, Jinfeng (1); Gao, Guanbao (1); Yan, Dongwei (1); Wang, Jinwu (1); Weng, Wuxiong (1); Chen, Bowen (1)

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

Corresponding author: Wang, Jinwu(jinwuw@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 46-57

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming at the issues of fertilization and weeding operations in paddy field during the tillering stage, there are many problems in the operation, serious environmental pollution and uneven nutrition distribution. A kind of rice planting that can be completed synchronously in combination with the agronomic characteristics of deep fertilization and weeding at the tillering stage was designed. According to the D’Alembert’s principle, the dynamics analysis of the start-up acceleration stage of the implement was carried out, and the mathematical model of the driving torque required for the active weeding wheel was established. The theoretical value of the maximum driving torque required for the active weeding wheel was 59.05 N•m, and the control system for the deep fertilization device was completed. And walking control system design was implemented. The quadratic orthogonal rotation combination design was adopted. The tool forward speed and the blade opening diameter were the influencing factors. The average fertilization amount and the variation coefficient of fertilization uniformity were used as the response indicators. The JPS-12 seed metering instrument was used to test the test rig. A bench test was performed on the row fertilizer performance of the deep fertilization device. The variance analysis and response surface analysis of the test data were performed by using Design-Expert software. The mathematical model between the influencing factors and the response indicators was obtained. The mathematical model was optimized and the optimization results showed that at a forward speed of 0.40 m/s and a blade opening diameter of 16 mm, the average fertilization amount of fertilization was 0.20 g, and the minimum value of fertility uniformity was 21.7%. Field performance tests were carried out on the implements. When the blade opening diameter was 16 mm, the implement advance speed was 0.40 m/s, and the given fertilizer amount was 67.5 kg/hm2, the fertilizer amount deviation was controlled within 3.54%, and the implements were used for weeding at different forward speeds. All of them were greater than 78.5%, which met the agronomic requirements for deep tillering and inter-row weeding in paddy field. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 26

Main heading: Software testing

Controlled terms: Agronomy  -  Control systems  -  Fertilizers  -  Surface analysis  -  Wheels

Uncontrolled terms: Electromotion  -  Inter-row weeding  -  Paddy fields  -  Side deep fertilization  -  Working implement

Classification code: 601.2 Machine Components

Machine Components

  -  723.5 Computer Applications

Computer Applications

  -  731.1 Control Systems

Control Systems

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821.3 Agricultural Methods

Agricultural Methods

  -  951 Materials Science

Materials Science

Numerical data indexing: Mass 2.00e-04kg, Percentage 2.17e+01%, Percentage 3.54e+00%, Percentage 7.85e+01%, Size 1.60e-02m, Torque 5.90e+01N*m, Velocity 4.00e-01m/s

DOI: 10.6041/j.issn.1000-1298.2018.07.006

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

2. Effect of Poly-γ-glutamicacid on Freezing Stability of Gluten Protein

Accession number: 20184506044424

Title of translation: γ-聚谷氨酸对面筋蛋白冻藏稳定性的影响

Authors: Xie, Xinhua (1, 2); Wu, Xiuyuan (1, 2); Zhang, Bei (1, 2); Xu, Chao (1, 2); Zhang, Yanjie (1, 2); Shen, Yue (1, 2)

Author affiliation: (1) College of Food Science and Technology, Henan Agricultural University, Zhengzhou; 450002, China; (2) Key Laboratory of Staple Grain Processing, Ministry of Agriculture, Zhengzhou; 450002, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 369-374

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Nuclear magnetic resonance instruments (NMR), Fourier transform infrared spectrometer (FITR), differential scanning calorimetry (DSC), dynamic rheometers (DHR) and scanning electron microscopy (SEM) were used to study the effect of poly-γ-glutamicacid (γ-PGA) addition on the stability of gluten protein during frozen storage. Gluten protein was measured on days 0, 7, 21, 35 and 49, respectively. The thermal hysteresis activity of γ-PGA was measured by DSC. The results showed that γ-PGA had good antifreeze activity. The obtained results showed that supplementation with 1% γ-PGA lowered the conversion of immobilized water to free water in gluten during frozen storage. γ-PGA inhibited the decrease of α-helix and the increase of random coil during frozen storage, and the addition of γ-PGA significantly increased the α-helix content. The results of DSC and TGA showed that the addition of γ-PGA improved the thermodynamic stability of gluten protein. The denaturation temperature of gluten protein increased by 4, and the increase in weight loss caused by frozen storage was also smller than that of the control group. With the extension of frozen storage time, the decrease of G’ and G” of gluten protein added with γ-PGA was lower than that of control group. The electron microscope results showed that the gluten network structure with γ-PGA added was more uniform, smaller in pore size and better in continuity after 49 d of frozen storage. The above results indicate that γ-PGA can effectively inhibit the growth and recrystallization of ice crystals, weaken the destruction of gluten network by frozen storage, and improve the frozen storage stability of gluten. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 25

Main heading: Magnetic storage

Controlled terms: Convergence of numerical methods  -  Differential scanning calorimetry  -  Fourier transform infrared spectroscopy  -  Nuclear magnetic resonance  -  Pore size  -  Proteins  -  Scanning electron microscopy  -  Stability  -  Thermodynamic stability

Uncontrolled terms: Antifreeze activities  -  Denaturation temperatures  -  Dynamic rheometers  -  Fourier transform infrared spectrometer  -  Frozen storage  -  Gluten protein  -  Network structures  -  Protein structures

Classification code: 641.1 Thermodynamics

Thermodynamics

  -  722.1 Data Storage, Equipment and Techniques

Data Storage, Equipment and Techniques

  -  801 Chemistry

Chemistry

  -  804.1 Organic Compounds

Organic Compounds

  -  921.6 Numerical Methods

Numerical Methods

  -  944.6 Temperature Measurements

Temperature Measurements

  -  951 Materials Science

Materials Science

Numerical data indexing: Percentage 1.00e+00%

DOI: 10.6041/j.issn.1000-1298.2018.07.045

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

3. Storage Stability of Micro-aerobic Coupling Functional Membrane and Gas Emission Reduction of Dairy Manure

Accession number: 20184506044419

Title of translation: 奶牛粪微好氧耦合功能膜贮存稳定性与气体减排研究

Authors: Huang, Guangqun (1); Fang, Chen (1); Ma, Shuangshuang (1); Han, Lujia (1)

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

Corresponding author: Han, Lujia(hanlj@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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 335-341

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Intensive farming produces a large amount of dairy manure every day. The pre-storage process of resource utilization is easy to produce ammonia gas and greenhouse gas due to local anaerobic areas, which caused the loss of nitrogen and environmental pollution. The functional membrane with selective permeability was used as the covering material and coupled with the micro-aerobic environment, and the dynamic changes of storage materials were analyzed to explore the feasibility of micro-aerobic coupling membrane technology for storage stability of dairy manure and gas emission reduction. Dairy manure was used as experimental materials, and membrane with selective permeability was used as covering material, the storage trial was carried out in an intelligent lab-scale membrane-covered aerobic composting reactor system for 30 d. There were membrane-covered treatment and control treatment in this trial. To make the internal oxygen concentration between 4% and 6%, the oxygen concentration in the reactor was controlled by the feedback regulation mode through the pipe at the bottom of the reactor. Physicochemical indicators, biological indicators and main gases emission were monitored and analyzed in the storage process. The results showed that the micro-aerobic coupling membrane technology was more conducive to storage stability compared with conventional storage. And the effect of gas emission reduction was significant. Compared with the control group, the ammonia gas emission was decreased by 14.4%, and the total greenhouse gas emission was decreased by 25.58% in the membrane-covered group. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 26

Main heading: Gas permeable membranes

Controlled terms: Ammonia  -  Convergence of numerical methods  -  Emission control  -  Energy storage  -  Fertilizers  -  Gas emissions  -  Greenhouse gases  -  Manures  -  Membrane technology  -  Oxygen   -  Stability  -  Storage (materials)

Uncontrolled terms: Dairy manures  -  Environmental pollutions  -  Experimental materials  -  Functional membranes  -  Gas emission reduction  -  Greenhouse gas emission reduction  -  Micro aerobics  -  Selective permeability

Classification code: 451.1 Air Pollution Sources

Air Pollution Sources

  -  451.2 Air Pollution Control

Air Pollution Control

  -  525.7 Energy Storage

Energy Storage

  -  694.4 Storage

Storage

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.2 Inorganic Compounds

Inorganic Compounds

  -  821.5 Agricultural Wastes

Agricultural Wastes

  -  921.6 Numerical Methods

Numerical Methods

  -  951 Materials Science

Materials Science

Numerical data indexing: Percentage 1.44e+01%, Percentage 2.56e+01%, Percentage 4.00e+00% to 6.00e+00%

DOI: 10.6041/j.issn.1000-1298.2018.07.040

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

4. Design and Start-up Test of Horizontal Plug-flow Dry Anaerobic Fermentation Equipment

Accession number: 20184506044417

Title of translation: 横推流式连续干法厌氧发酵设备设计与试验

Authors: Feng, Jing (1); Hu, Xin (1, 2); Zhao, Lixin (1); Guo, Zhanbin (2); Yao, Zonglu (1); Luo, Juan (1)

Author affiliation: (1) Key Laboratory of Energy Resource Utilization from Agriculture Residue, Ministry of Agriculture, Chinese Academy of Agriculture Engineering, Beijing; 100125, China; (2) College of Engineering, Heilongjiang Bayi Agricultural University, Daqing; 163319, China

Corresponding author: Zhao, Lixin(zhaolixin5092@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 319-325

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: At present, the dry anaerobic fermentation technique is still not applied widely among biogas plants in China. Especially, there are few reports on dry fermentation techniques employed in biogas plants. Aimed to this situation, a design method of horizontal plug-flow dry anaerobic fermentation equipment was developed, which employed a screw convey for continuous inlet and a vacuum device for outlet. Based on this method, a pilot scale equipment was developed with an effective volume of 180L. The equipment consisted of screw convey, dry anaerobic fermentation reactor, vacuum pump for discharge, gas purification reactor and solid-liquid separation device. All the above devices were online controlled with a computer. The pilot equipment was started up using mixture of cow dung and corn straw with a mixing ratio of 3:1 (dry matter ratio), the inoculums accounted a proportion of 30% in inlet raw materials and the initial total solid content was 20%. The whole start-up (103 d) could be divided into three stages. During stage I, the reactor was operated at room temperature, the average biogas producing rate for the reactor was 0.17 m3/(m3•d). After 68 d of running, the reactor temperature was raised to 38, and then the average biogas producing rate was risen to 0.25 m3/(m3•d), with a decrease of methane content. Meanwhile, the pH value was decreased significantly. After 70 d of running, the inoculation was increased to 50% by adding biogas slurry. After that the biogas production rate of the reactor was increased rapidly and reached the highest point of 0.58 m3/(m3•d). The average biogas production rate was around 0.48 m3/(m3•d), and methane content was stable at about 56%. At the end of the start-up, the dry matter degradation rate of raw materials reached more than 48%. The performance of the reactor during start-up suggested that the equipment could run normally, which meet the design requirement. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 34

Main heading: Design

Controlled terms: Air purification  -  Biogas  -  Degradation  -  Fermentation  -  Methanation  -  Methane  -  Screws

Uncontrolled terms: Anaerobic fermentation  -  Biogas production rates  -  Pilot tests  -  Pilot-scale equipment  -  Plug flow  -  Reactor temperatures  -  Solid liquid separation  -  Total solid content

Classification code: 522 Gas Fuels

Gas Fuels

  -  605 Small Tools and Hardware

Small Tools and Hardware

  -  643 Space Heating, Ventilation and Air Conditioning

Space Heating, Ventilation and Air Conditioning

  -  802.2 Chemical Reactions

Chemical Reactions

  -  804.1 Organic Compounds

Organic Compounds

Numerical data indexing: Percentage 2.00e+01%, Percentage 3.00e+01%, Percentage 4.80e+01%, Percentage 5.00e+01%, Percentage 5.60e+01%, Volume 1.80e-01m3

DOI: 10.6041/j.issn.1000-1298.2018.07.038

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

5. Rapid Quantitative Analysis of Crop Straws’ Thermal Conductivity Based on Infrared Photoacoustic Spectroscopy

Accession number: 20184506044420

Title of translation: 基于红外光声光谱的农作物秸秆导热系数定量分析

Authors: Huang, Guangqun (1); Duan, Hongwei (1); He, Jinhong (1); Han, Lujia (1)

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

Corresponding author: Han, Lujia(hanlj@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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 342-347

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Rapid determination of thermal conductivity is of great significance for realizing high-efficient and value-added utilization of crop straw. The feasibility of infrared photoacoustic spectroscopy coupled with chemometrics for developing the quantitative models of main crop straws’ thermal conductivity in China was investigated. The representative samples of wheat, corn and rice straws were initially acquired from North China, and the full-band models of single and mixed kinds of straws were then developed by using the partial least squares regression (PLSR) and Gaussian kernel support vector regression (RBF-SVR). By comparing the model effects of PLSR and RBF-SVR, it was found that the full-band RBF-SVR models of wheat stalk and rice straw had better performances, while the full-band PLSR models were more appropriate for corn and mixed straws. Moreover, based on the combination of above-mentioned optimal modeling method and the ant colony algorithm, the new feature models of wheat, corn, rice and mixed straws showed better performances, which yielded determination coefficient of prediction set (Rp2) of 0.77, 0.83, 0.96 and 0.79, root mean square error of prediction set (RMSEP) of 0.007 8, 0.015, 0.005 9 and 0.014 W/(m•K), relative percent deviation of prediction set (RPD) of 2.81, 2.41, 7.39 and 2.15, respectively. Results showed that FTIR-photoacoustic spectroscopy coupled with applicable chemometrics had good potential for rapid quantitative analysis of main crop straws’ thermal conductivity in China. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Thermal conductivity

Controlled terms: Ant colony optimization  -  Crops  -  Forecasting  -  Fourier transform infrared spectroscopy  -  Least squares approximations  -  Mean square error  -  Photoacoustic effect  -  Photoacoustic spectroscopy  -  Radial basis function networks  -  Spectrum analysis

Uncontrolled terms: Ant colony algorithms  -  Crop straws  -  Determination coefficients  -  Partial least square (PLS)  -  Partial least squares regressions (PLSR)  -  Root-mean-square error of predictions  -  Support vector  -  Support vector regression (SVR)

Classification code: 641.1 Thermodynamics

Thermodynamics

  -  741.1 Light/Optics

Light/Optics

  -  801 Chemistry

Chemistry

  -  821.4 Agricultural Products

Agricultural Products

  -  921.5 Optimization Techniques

Optimization Techniques

  -  921.6 Numerical Methods

Numerical Methods

  -  922.2 Mathematical Statistics

Mathematical Statistics

Numerical data indexing: Thermal_Conductivity 1.40e-02W/m*K, Thermal_Conductivity 9.00e+00W/m*K

DOI: 10.6041/j.issn.1000-1298.2018.07.041

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

6. In-suit Catalytic Online Upgrading of Bio-oil over La/MCM-41

Accession number: 20184506044414

Title of translation: La改性MCM-41在线催化提质生物油研究

Authors: Li, Xiaohua (1); Hu, Chao (1); Zhang, Xiaolei (1); Dong, Liangxiu (1); Cai, Yixi (1); Shao, Shanshan (1)

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

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 296-302

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The rape straw was chosen as experiment materials, and different concentrations of La/MCM-41 were prepared by the impregnation method, then online upgrading of rape straw pyrolysis vapors was performed over La/MCM-41. The modified catalysts were characterized by XRD, SEM and Py-IR, respectively. The influence of the introduction of La on the physical and chemical characteristics of organic phase of bio-oil was analyzed. The results showed that La/MCM-41 had the standard MCM-41 structure and typically hexagonal ordered structure, the surface of La/MCM-41 had more acid of Bronsted acid sites and Lewis acid sites. The organic phase included a variety of organic compounds, such as acid, aldehyde, ketone, alcohols, hydrocarbons and others. The modified MCM-41 catalyst can effectively remove the acid, aldehyde and ketone contained in the bio-oil organic phase. At the same time, when the La was loaded up to 5%, the bio-oil organic phase achieved a high yield rate to 18.83% and better physciochemical properties. The heating value of organic phase was up to 33.69 MJ/kg and the content of hydrocarbon was increased significantly to 34.59% and mainly with monocylic aromatics hydrocarbons, which reduced the content of oxygen in oxygenated compounds. The research result would provide the reliable theoretical basis and experimental basis for the efficient utilization of biomass and the further modification of MCM-41 molecular seive. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Biofuels

Controlled terms: Aldehydes  -  Catalysts  -  Chemical analysis  -  Hydrocarbons  -  Ketones  -  Lanthanum

Uncontrolled terms: Bio oil  -  Bronsted acid sites  -  Catalytic upgrading  -  Impregnation methods  -  Modified MCM-41  -  Oxygenated compounds  -  Physciochemical properties  -  Physical and chemical characteristics

Classification code: 547.2 Rare Earth Metals

Rare Earth Metals

  -  803 Chemical Agents and Basic Industrial Chemicals

Chemical Agents and Basic Industrial Chemicals

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

Numerical data indexing: Percentage 3.46e+01%, Percentage 5.00e+00%, Specific_Energy 3.37e+07J/kg, Percentage 1.88e+01%

DOI: 10.6041/j.issn.1000-1298.2018.07.035

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

7. Simulation of Winter Wheat Growth under Different Scenarios of Water Stress with RZWQM2 Model

Accession number: 20184506044404

Title of translation: 不同水分胁迫情境下冬小麦生长发育的RZWQM2模拟

Authors: Jiang, Tengcong (1, 2); Dou, Zihe (1, 2); Yao, Ning (1, 2); Feng, Hao (2, 3); Yu, Qiang (3); He, Jianqiang (1, 2)

Author affiliation: (1) Key Laboratory for Agricultural Soil and Water Engineering in Arid Area, Ministry of Education, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling; Shaanxi; 712100, China; (3) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Water and Soil Conservation, Chinese Academy of Science and Ministry of Water Resource, Yangling; Shaanxi; 712100, China

Corresponding author: He, Jianqiang(jianqiang_he@nwsuaf.edu.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 205-216

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming to improve its ability to simulate crop growth and yield under different scenarios of soil water stress, the current stress factors of water stress index 1 (WSI1) was modified and two more different indices of WSI2 and WSI3 were created for the root zone water quality model (RZWQM2). The index of WSI2 was based on a modification of the soil water factor (SWFAC) for photosynthesis-related processes in RZWQM2 using daily potential root water uptake calculated by the Nimah and Hanks approach. The index of WSI3 was based on WSI2 but with new terms accounting for the stress due to additional heating of the canopy by unused energy for potential soil evaporation in both the supply and demand terms of WSI2. The RZWQM2 model and these three different water stress indices were evaluated by using the data of soil water, total transpiration, biomass and grain yield obtained from a winter wheat experiment conducted under different water stress scenarios at different growing stages in two consecutive growth seasons of 2012-2013 and 2013-2014. The results showed that these three water stress indices were all able to correctly simulate the dynamic changes of winter wheat growth and soil water content when water stress occurred during the heading and grain-filling stages. However, when water stress occurred earlier and severer, the simulation accuracy became lower. Generally, the water stress index of WSI2 was better than WSI1 under different scenarios, since the relative root mean square error (RRMSE) for biomass was decreased by 2.84 percentage point, and the absolute relative error (ARE) for yield was decreased by 1.43 percentage point, especially when water stress occurred during the wintering and greening stages. In general, there were still some limitations for the RZWQM2 model to simulate winter wheat growth under arid conditions. Thus, the RZWQM2 model can be further improved in the following aspects, such as the response of phenology to soil water stress, the improvement of ET simulation, and the compensation effect of rehydration on winter wheat after long water stress. It was suggested that model users should choose WSI2, if the RZWQM2 model was expected to simulate the response of winter wheat to soil water stress. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 48

Main heading: Crops

Controlled terms: Ecology  -  Economics  -  Forestry  -  Grain (agricultural product)  -  Mean square error  -  Soil moisture  -  Water quality

Uncontrolled terms: Crop model  -  Growth and development  -  Soil water  -  Water stress  -  Winter wheat

Classification code: 445.2 Water Analysis

Water Analysis

  -  454.3 Ecology and Ecosystems

Ecology and Ecosystems

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  821.4 Agricultural Products

Agricultural Products

  -  922.2 Mathematical Statistics

Mathematical Statistics

  -  971 Social Sciences

Social Sciences

DOI: 10.6041/j.issn.1000-1298.2018.07.025

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

8. Method of Soil Sampling Design Based on Priority Index

Accession number: 20184506044408

Title of translation: 基于优先级指数的土壤采样设计方法研究

Authors: Wang, Zilong (1); Chen, Weijie (1); Fu, Qiang (1); Jiang, Qiuxiang (1); Yin, Yuming (1); Chang, Guangyi (1)

Author affiliation: (1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China

Corresponding author: Fu, Qiang(fuqiang@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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 244-251

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The optimal sampling strategy is the balance between sampling intensity, cost analysis and research accuracy, namely, getting optimal precision through minimum cost. Sampling designs at home and abroad mostly use the model to optimize the sampling strategy. Based on the results of the traditional preliminary sampling method, it is not suitable for the preliminary sampling design. The existing representative grade method ignores the influence of the different coordination factors, which cannot use information of qualitative factors, and the results were affected by subjective parameters such as membership thresholds. In order to overcome these shortcomings, a method of soil sampling design based on priority was proposed, which was able to empower each synergistic factor, transfer information completely and accommodate a wide range of qualitative and quantitative synergistic factors in aided design. The results showed that the information carried by the priority sampling point set was closer to the total sample point set than the hierarchical sampling point set and the random sampling point set. The weight of the coordination factor was an important parameter of the soil sampling design based on sample priority, which had a certain influence on the result in terms of spatial distribution trend and interpolation error. The sampling design method can meet the needs of region sampling, improve the sampling efficiency and quality, and provide references for the designs of the other soil sampling schemes. Additionally,sampling benefit (ratio of variation in sampling accuracy to variation in sampling cost) can provide guidance for further determination of reasonable sampling numbers to some extent. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 35

Main heading: Importance sampling

Controlled terms: Cost benefit analysis  -  Design  -  Geometry  -  Soil surveys  -  Soils

Uncontrolled terms: Hierarchical sampling  -  Interpolation error  -  Qualitative factors  -  Sampling accuracies  -  Sampling strategies  -  Soil characteristics  -  Spatial sampling  -  Transfer information

Classification code: 483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  911 Cost and Value Engineering; Industrial Economics

Cost and Value Engineering; Industrial Economics

  -  921 Mathematics

Mathematics

  -  922 Statistical Methods

Statistical Methods

DOI: 10.6041/j.issn.1000-1298.2018.07.029

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

9. Mass Transfer Performance and Modeling of CO2 Chemical Absorption from Simulated Biogas

Accession number: 20184506044416

Title of translation: 沼气中CO2化学吸收传质性能分析与传质系数建模

Authors: Yan, Shuiping (1, 2); Yu, Ge (1, 2); Pu, Jicheng (1, 2); Zhou, Hongliang (1, 2); He, Qingyao (1, 2); Wang, Ming (1, 2)

Author affiliation: (1) College of Engineering, Huazhong Agricultural University, Wuhan; 430070, China; (2) Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River, Ministry of Agriculture, Wuhan; 430070, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 311-318

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: As one of the robust CO2 separation technologies, CO2 chemical absorption method can fully meet the requirement of CO2 capture from biogas, which is deserved to pay more attention. In a chemical absorption process, CO2 absorption always happens in a packed column called CO2 absorber, and therefore the mass transfer performance of CO2 absorption into absorbent is of importance for the design of absorber. However, the study on CO2 mass transfer characteristics and correlations in a packed column under the biogas circumstance is relatively rare. Therefore, the mass transfer performance of CO2 absorption into monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA) and piperazine (PZ) from the simulated biogas was investigated in a random pall ring packed column in terms of the overall gas phase volumetric mass transfer coefficient (KGav). Additionally, the effects of the key operation parameters, including absorbent concentration, temperature, liquid flow rate, CO2 loading, gas flow rate and CO2 partial pressure in gas on KGav values were experimented. Based on these influences, the empirical correlations of the operation parameters on KGav for MEA, DEA and PZ were erected. Results showed that PZ possessed the best CO2 mass transfer performance under the same conditions, followed by MEA, DEA and TEA. With the increase of absorbent concentration, KGav values of MEA, DEA and PZ were risen greatly. Accordingly, CO2 volumetric fractions in the gas exiting the absorber decrease gigantically. If CO2 volumetric fraction of the outlet gas less than 1% was targeted, the concentrations of MEA, DEA and PZ should be increased to 1.38 mol/L, 1.43 mol/L and 0.88 mol/L, respectively. However, the KGav value of TEA was dropped slightly due to the increase of solvent viscosity. Among all the absorbents, MEA achieved the highest KGav value with about 1.37 kmol/(m3•h•kPa) at 3.27 mol/L. In addition, KGav values of all the absorbents tested were increased with the increase of liquid flow rate, liquid temperature and gas flow rate. However, the initial CO2 loading of absorbent had a negative impact on KGav. It should be noted that the influence of CO2 partial pressure in gas on KGav was not significant. Furthermore, the simplified empirical correlations for KGav as a function of the key operation parameters were proposed for MEA, DEA and PZ, and most of the calculated KGav values were in agreement with the experimental data with an absolute average deviation less than 14%. According to the individual degree of operation parameters on KGav, the rank order was liquid temperature, liquid flow rate, active MEA concentration and gas flow rate for MEA case. As for DEA, active DEA concentration was the most important, followed by liquid flow rate, gas flow rate and liquid temperature. And for PZ, the most important factor was the active PZ concentration, followed by liquid temperature, liquid flow rate and gas flow rate. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Gas absorption

Controlled terms: Biogas  -  Carbon dioxide  -  Ethanolamines  -  Flow of gases  -  Flow rate  -  Gases  -  Liquids  -  Mass transfer  -  Mathematical models  -  Triethanolamine   -  Volumetric analysis

Uncontrolled terms: Absolute average deviation  -  Biogas upgrading  -  CO2 absorption  -  Empirical correlations  -  Mass transfer characteristics  -  Mass transfer performance  -  Performance analysis  -  Volumetric mass transfer coefficient

Classification code: 522 Gas Fuels

Gas Fuels

  -  631 Fluid Flow

Fluid Flow

  -  631.1.2 Gas Dynamics

Gas Dynamics

  -  641.3 Mass Transfer

Mass Transfer

  -  801 Chemistry

Chemistry

  -  802.3 Chemical Operations

Chemical Operations

  -  804.1 Organic Compounds

Organic Compounds

  -  804.2 Inorganic Compounds

Inorganic Compounds

Numerical data indexing: Molar_Concentration 1.38e+03mol/m3, Molar_Concentration 1.43e+03mol/m3, Molar_Concentration 3.27e+03mol/m3, Molar_Concentration 8.80e+02mol/m3, Percentage 1.00e+00%, Percentage 1.40e+01%

DOI: 10.6041/j.issn.1000-1298.2018.07.037

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

10. Sinusoidal Position/Force Amplitude and Phase Control for Hydraulically Driven Parallel Loading Mechanism

Accession number: 20184506044428

Title of translation: 液压驱动并联加载机构正弦位置/力幅相控制

Authors: Gao, Changhong (1); He, Biao (1); Qu, Zhiyong (2); Cong, Dacheng (2)

Author affiliation: (1) Aviation Equipment Research Institute, AVIC Qing-an Group Co., Ltd., Xi’an; 710077, China; (2) School of Mechatronic Engineering, Harbin Institute of Technology, Harbin; 150001, China

Corresponding author: Qu, Zhiyong(hitqzy@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 395-400 and 362

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Due to nonlinear factors existed in hydraulic system and coupled interaction from specimen, the bandwidth of position and force degrees of freedom (DOF) of hydraulic actuated parallel loading mechanism (HPLM) can be improved in the limited situation, which results in the amplitude attenuation and phase lag of response sinusoidal position/force signals. To improve the tracking accuracy of sinusoidal signals, some types of amplitude and phase control (APC), which were based on the Widrow-Hoff learning algorithm, extremum seeking techniques and so on, were proposed by some researchers. However, some shortcomings such as complex control structure, superabundant tuned parameters, and huge computation and so on, made these APC methods difficult to implement. To solve the problem, an improved amplitude and phase control (IAPC) was presented. Three characteristic parameters of sinusoidal signal, which was amplitude, phase and mean value, were estimated and regarded as control variables to be controlled separately. The methods of controller design and control parameter tuning were given. The stability of system under the proposed IAPC was analyzed. To verify the performance of the proposed IAPC experimentally, a 6-DOF hydraulically actuated redundant parallel loading mechanism under position-based hybrid position/force loading control was introduced, and its position/force close-loop frequency response characteristics were presented. The experiments containing sinusoidal position loading, sinusoidal force loading and hybrid sinusoidal position/force loading were done. The experimental results showed that the tracking accuracy of sinusoidal position/force signals could be significantly improved under the proposed IAPC with the characteristics of simple control structure and less and easily tuned parameters. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Loading

Controlled terms: Control theory  -  Controllers  -  Degrees of freedom (mechanics)  -  Frequency response  -  Hydraulic equipment  -  Loads (forces)  -  Parameter estimation  -  Phase control

Uncontrolled terms: Amplitude and phase control  -  Coupled interaction  -  Frequency response characteristic  -  Hydraulic system  -  Redundant parallels  -  Sinusoidal signals  -  Tracking accuracy  -  Widrow-Hoff learning algorithm

Classification code: 408 Structural Design

Structural Design

  -  632.2 Hydraulic Equipment and Machinery

Hydraulic Equipment and Machinery

  -  691.2 Materials Handling Methods

Materials Handling Methods

  -  731.1 Control Systems

Control Systems

  -  731.3 Specific Variables Control

Specific Variables Control

  -  732.1 Control Equipment

Control Equipment

  -  931.1 Mechanics

Mechanics

DOI: 10.6041/j.issn.1000-1298.2018.07.049

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

11. Cleaning of Maize Mixture Based on Polyurethane Rubber Sieve

Accession number: 20184506044390

Title of translation: 玉米收获机聚氨酯橡胶筛筛分性能仿真与试验

Authors: Wang, Lijun (1); Peng, Bo (1); Song, Huiqiang (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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 90-96

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to reduce the cost and difficulty of manufacturing, and increase the degree of dispersion of sieve particles on the maize air-and-screen metal sieve, a new polyurethane rubber sieve was used to replace the metal sieve, the density of polyurethane rubber and the physical parameter between particles on the sieve and the polyurethane rubber were obtained through experiment, including coefficient of static friction and coefficient of restitution, the shear modulus of the polyurethane rubber was deduced. EDEM was used to establish models of particles on the sieve. The number of particles on different regions of the polyurethane rubber sieve was analyzed through computational fluid dynamics and discrete element method. The simulation results showed that the dispersion of the particles on the polyurethane rubber sieve was greater than that of the metal sieve at the same range of time, which proved that polyurethane rubber sieve was more conducive to particles dispersion which improved the efficiency of sieve. The tests were performed based on the experimental system to verify whether the urethane rubber sieve was met the operational requirements. The loss rate of maize of cleaning device was 1.93%, when the normal feed quantity of maize mixture was 5 kg/s, the inlet wind speed of cleaning device was 12 m/s, which met the national standard and the technical specification for quality evaluation of maize harvester. Cleaning rate of maize of polyurethane rubber sieve, which was increased by 16.33 percentage points through the comparison with metal sieve, was up to 95.3%. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Sieves

Controlled terms: Computational fluid dynamics  -  Dispersions  -  Harvesters  -  Metal cleaning  -  Metals  -  Mixtures  -  Polyurethanes  -  Quality control  -  Rubber  -  Rubber applications   -  Stiction  -  Wind

Uncontrolled terms: Clearing device  -  Coefficient of restitution  -  Degree of dispersion  -  Experimental system  -  Operational requirements  -  Performance analysis  -  Polyurethane rubbers  -  Technical specifications

Classification code: 443.1 Atmospheric Properties

Atmospheric Properties

  -  723.5 Computer Applications

Computer Applications

  -  815.1.1 Organic Polymers

Organic Polymers

  -  818.1 Natural Rubber

Natural Rubber

  -  818.6 Rubber Applications

Rubber Applications

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

  -  913.3 Quality Assurance and Control

Quality Assurance and Control

  -  951 Materials Science

Materials Science

Numerical data indexing: Mass_Flow_Rate 5.00e+00kg/s, Percentage 1.93e+00%, Percentage 9.53e+01%, Velocity 1.20e+01m/s

DOI: 10.6041/j.issn.1000-1298.2018.07.011

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

12. Spatial Morphology Identification of Well-facilitated Farmland Construction Based on Patch Scale

Accession number: 20184506044393

Title of translation: 基于田块尺度的高标准农田建设空间形态判别研究

Authors: Li, Shaoshuai (1, 2); Yun, Wenju (2); Cao, Wenjing (3); Jin, Xiaobin (4); Li, Hongju (2); Zhang, Chao (5)

Author affiliation: (1) School of Land Science and Technology, China University of Geosciences (Beijing), Beijing; 100083, China; (2) Land Consolidation and Rehabilitation Center, Ministry of Land and Resource, Beijing; 100035, China; (3) Center for Assessment and Development of Real Estate, Shenzhen; 518040, China; (4) School of Geography and Ocean Sciences, Nanjing University, Nanjing; 210093, China; (5) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 112-118

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Well-facilitated farmland construction is an important strategy to ensure food safety. It is meaningful for improving regulation efficiency to quickly determine whether farmland construction is of high standard or not. Well-facilitated farmland has its remarkable features in engineering layout and structure,and has distinctive spatial morphology compared with regular farmland. In order to quickly recognize well-facilitated farmland,based on patch scale,a system for identifying spatial pattern was established,considering patch size,patch shape index,spatial relationship of patch with pathway,irrigation channel,drainage and shelter. Using this system,the case of Songyuan land consolidation project located in Jilin Province was looked into, and it was found that 129 patches (78.2% of the total cultivated land area) completely met the criteria of well-facilitated farmland,and 43 patches can not completely meet criteria. These 43 patches were characterized by the spatial structure below the form requirements for strip farmland,insufficient farmland shelter construction and irrigation facilities. The results indicated that spatial morphology can be regarded as an important criterion for judging whether a farmland was well-facilitated or not. The morphology can not only help recognize the patches that met the requirement of well-facilitated farmland construction,but also analyze the insufficiencies in constructing a well-facilitated farmland. The research result can provide reference for improving the current regulation system of well-facilitated farmland construction. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 28

Main heading: Farms

Controlled terms: Irrigation  -  Morphology

Uncontrolled terms: Construction standards  -  Current regulations  -  Irrigation channels  -  Land consolidations  -  Patch scale  -  Shelter construction  -  Spatial morphologies  -  Spatial relationships

Classification code: 821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  821.3 Agricultural Methods

Agricultural Methods

  -  951 Materials Science

Materials Science

Numerical data indexing: Percentage 7.82e+01%

DOI: 10.6041/j.issn.1000-1298.2018.07.014

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

13. Design and Experiment on High Precision Diaphragm Metering Pump for SCR System

Accession number: 20184506044427

Title of translation: SCR系统高精度隔膜计量泵设计与试验

Authors: Yang, Kai (1); Liao, Yide (1); Chen, Xubing (1); Jia, Yuanjie (1); Lu, Yaojun (2)

Author affiliation: (1) School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan; 430205, China; (2) Hubei Tsung Technology Co., Ltd., Wuhan; 430223, China

Corresponding author: Liao, Yide(whgcdxl@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 390-394

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming at the problem of low measuring accuracy of the reciprocating pump due to unstable movement and untimely closure of the distribution one-way valve, a high precision diaphragm metering pump (DMP) with pump control metering, which is used for light commercial vehicle, was designed and developed. The DMP realized the integration of urea solution transportation and metering, simplified the structure of SCR system and reduced the cost. The structure and working principle of the DMP were introduced. The DMP was driven by a stepping motor. By setting the speed n of the stepper motor, the flow rate q can be adjusted accurately. Dynamic simulation of the DMP was carried out by using AMESim, and the response characteristics of the inlet one-way valve core were analyzed. The structure of the inlet one-way valve was optimized. Under the premise of meeting the minimum opening of the valve port, the maximum opening xmax of the valve core was limited by mechanical limit, which reduced the closing time of the valve core and the influence of urea solution reflux on the flow rate. Finally, the test system was built to test the performance of the DMP. When the rated injection pressure was 2 MPa, the single displacement of the DMP was measured to be 0.09 mL. The measuring accuracy of 4~6 DMP without structural optimization were reduced as the speed increase. The measuring accuracy were within ±5%. However, the measuring accuracy of 1~3 DMP were within the range of ±3% after structural optimization. At 150~420 r/min, the flow rate of urea solution can be adjusted in the range of 13.5~40 mL/min, and the maximum flow rate was 2.26 L/h, which can meet the requirement for urea solution of the light commercial vehicle SCR system under different working conditions. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Commercial vehicles

Controlled terms: Automobiles  -  Diaphragms  -  Flow rate  -  Light weight vehicles  -  Metabolism  -  Reciprocating pumps  -  Stepping motors  -  Structural optimization  -  Urea  -  Valves (mechanical)

Uncontrolled terms: AMESim simulation  -  Injection pressures  -  Light commercial vehicles  -  Maximum flow rate  -  Measuring accuracy  -  Response characteristic  -  SCR systems  -  Urea solutions

Classification code: 601.2 Machine Components

Machine Components

  -  618.2 Pumps

Pumps

  -  631 Fluid Flow

Fluid Flow

  -  662.1 Automobiles

Automobiles

  -  705.3 Electric Motors

Electric Motors

  -  804.1 Organic Compounds

Organic Compounds

  -  921.5 Optimization Techniques

Optimization Techniques

Numerical data indexing: Pressure 2.00e+06Pa, Rotational_Speed 1.50e+02RPM to 4.20e+02RPM, Volume 9.00e-08m3

DOI: 10.6041/j.issn.1000-1298.2018.07.048

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

14. Simulation of Effects of Pisha Sandstone on Improving Corn Yield in Sandy Soil with RZWQM2 Model

Accession number: 20184506044407

Title of translation: 砒砂岩改良风沙土对作物产量影响的RZWQM2模型模拟

Authors: Sun, Zenghui (1, 2); Han, Jichang (1, 3); Mao, Zhongan (1, 3); Wang, Huanyuan (1, 3); Hu, Ya (1, 3)

Author affiliation: (1) Shaanxi Province Land Engineering Construction Group, Xi’an; 710075, China; (2) Shaanxi Key Laboratory of Land Consolidation, Xi’an; 710064, China; (3) Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Land and Resources, Xi’an; 710075, China

Corresponding author: Han, Jichang(249475181@qq.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 235-243

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Serious desertification caused by human activity and climate change, in addition to water loss and soil erosion related to Pisha sandstone in the Mu Us sandy land, lead to severe scarcity of soil and water resources, which causes worse local agricultural conditions accordingly. Many physical properties of Pisha sandstone is complementary with that of sand, Pisha sandstone is therefore supposed to be blended to enhance water productivity and arability of sandy land. The root zone water quality model 2 (RZWQM2) was calibrated and validated based on 2-year experimental data for composite soils prepared at three ratios of Pisha sandstone to sand (1:1, 1:2 and 1:5), and then used to estimate potential yield (Yp) and rainfed potential yield (Yp(r)), along with yield gap (YG(r)) of corn (Zea mays L.) by using the weather data from 1990 to 2013 in Mu Us sandy land. The mean simulated Yp(r) of corn in the compound soil at a ratio of 1:2 (Pisha sandstone: sand) was significantly higher than that of the compound soil at 1:1 and 1:5 ratios, respectively. There was no difference in the simulated Yp(r) between those of the 1:1 and 1:5 ratios of Pisha sandstone to sand. The mean simulated Yp(r) of corn was 2 551 kg/hm2, 3 527 kg/hm2 and 2 924 kg/hm2 and the YG(r) was 6 071 kg/hm2, 5 096 kg/hm2 and 5 698 kg/hm2 at 1:1, 1:2 and 1:5 ratios, respectively. The results showed the potential of Pisha sandstone as amendment on improving corn yield in Mu Us sandy land. Further research into the long-term effect of Pisha sandstone on soil chemical, biological properties and soil microbial community structure is required to gain a better understanding of the mechanism of Pisha sandstone as amendment for increasing crop yield in Mu Us sandy land, China. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 36

Main heading: Sandstone

Controlled terms: Agriculture  -  Climate change  -  Nitrogen fixation  -  Sand  -  Soils  -  Water quality  -  Water resources

Uncontrolled terms: Aeolian sandy soils  -  Agricultural conditions  -  Biological properties  -  Corn (Zea mays L.)  -  Root zone water quality models  -  Soil microbial community structure  -  Water productivity  -  Yield

Classification code: 443.1 Atmospheric Properties

Atmospheric Properties

  -  444 Water Resources

Water Resources

  -  445.2 Water Analysis

Water Analysis

  -  482.2 Minerals

Minerals

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  802.2 Chemical Reactions

Chemical Reactions

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

Numerical data indexing: Age 2.00e+00yr

DOI: 10.6041/j.issn.1000-1298.2018.07.028

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

15. Automatic Extraction Method of Hot Words Based on Agricultural Network Information Classification

Accession number: 20184506044399

Title of translation: 基于农业网络信息分类的热词自动提取方法

Authors: Duan, Qingling (1); Zhang, Lu (1); Liu, Yiran (1); Wang, Shasha (2)

Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Agricultural Information Technology Limited Liability Company of Beijing, Beijing; 100081, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 160-167

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: With the vigorous development of the Internet, the network information grows rapidly, so does the agricultural network information. Extracting hot words from massive information is of great significance for monitoring and analyzing agricultural public opinion. Up to now, there is some research on hot words extraction, but there are still many problems such as poor pertinence. Existing hot word extraction methods cannot meet the personalized needs of users in different industries in agriculture. Therefore, a method of automatically extracting hot words based on agricultural network information classification was proposed. Firstly, the texts were classified by using the multi-label classification algorithm and multiple corpuses were built according to the classification categories. Secondly, the hot word candidates for each category were extracted by using the method based on information entropy. Thirdly, the heat of each hot word candidate was calculated by using the method based on time variation. Finally, these candidates were sorted by heat degree, and hot words were got according to the sorting results. Totally 15 354 texts from agricultural websites were extracted for the experiment, automatically obtaining the hot words in the specified time period. The experiment results showed that the accuracy was over 0.9. It proved that the proposed method can extract agricultural hot words with high quality and help different agricultural user groups find and analyze the hot spot information of the industry. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 31

Main heading: Classification (of information)

Controlled terms: Agriculture  -  Extraction  -  Social aspects

Uncontrolled terms: Heat calculations  -  Hot word  -  Multi label classification  -  Network information  -  Public opinions

Classification code: 716.1 Information Theory and Signal Processing

Information Theory and Signal Processing

  -  802.3 Chemical Operations

Chemical Operations

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  901.4 Impact of Technology on Society

Impact of Technology on Society

DOI: 10.6041/j.issn.1000-1298.2018.07.020

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

16. Vibration Characteristics Analysis and Experimental Validation of 3-P(4S) Parallel Platform

Accession number: 20184506044212

Title of translation: 3-P(4S)并联平台振动特性分析与实验验证

Authors: Zhao, Xingyu (1, 2); Zhao, Tieshi (1, 2); Xu, Xuehan (1, 2); Zhao, Yanzhi (1, 2); Li, Zhongjie (1, 2)

Author affiliation: (1) Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao; 066004, China; (2) Key Laboratory of Advanced Forging and Stamping Technology and Science, Ministry of Education, Yanshan University, Qinhuangdao; 066004, China

Corresponding author: Zhao, Tieshi(tszhao@ysu.edu.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 419-426

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The 3-P(4S) parallel platform has three translational degrees of freedom and excellent decoupling performances. In order to analyze the application prospect of 3-P(4S) parallel platform as a vibration platform, first of all, the vibration model was introduced according to its dynamic model, and vibration equation was simplified according to the characteristics of the driving units. And the vibration frequencies and regular vibrations were obtained. Furthermore, the vibration model was verified by the simulation in ADAMS software, and the error was within the range of 0.5%. Besides, the vibration characteristics of the 3-P(4S) parallel platform were analyzed, including the natural frequency with the change of position and sensitivity characteristics. Finally, the modal test of the 3-P(4S) parallel platform was carried out based on the hammering method, and the modal test results were the time domain signals, and then the time domain signals were converted into frequency domain signals by Fourier transformation. The experimental results of natural frequencies were obtained by the frequency domain waveforms from the modal test, and the errors of the natural frequencies and the theory calculated ones were within the range of 3%, which proved the correctness of theoretical analysis, and indicated that the 3-P(4S) parallel platform could be applied to the fields of vibration simulation and vibration test. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Vibration analysis

Controlled terms: Computer software  -  Degrees of freedom (mechanics)  -  Experiments  -  Fourier transforms  -  Frequency domain analysis  -  Modal analysis  -  Natural frequencies  -  Time domain analysis

Uncontrolled terms: Experimental validations  -  Frequency-domain signal  -  Hammering method  -  Parallel platforms  -  Sensitivity characteristics  -  Three translational degrees of freedoms  -  Vibration characteristics  -  Vibration characteristics analysis

Classification code: 723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  901.3 Engineering Research

Engineering Research

  -  921 Mathematics

Mathematics

  -  921.3 Mathematical Transformations

Mathematical Transformations

  -  931.1 Mechanics

Mechanics

Numerical data indexing: Percentage 3.00e+00%, Percentage 5.00e-01%

DOI: 10.6041/j.issn.1000-1298.2018.07.052

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

17. Interaction Effect and Model of Water and Nitrogen under Degradable Film Mulching in Drip Irrigated Sandy Farmland

Accession number: 20184506044410

Title of translation: 沙区降解膜覆盖下滴灌农田水氮交互效应与模型研究

Authors: Li, Xianyue (1); Ding, Zongjiang (1); Yan, Jianwen (1); Guo, Yu (1); Leng, Xu (1); Wang, Meirong (1)

Author affiliation: (1) College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Huhhot; 010018, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 261-270

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to explore the interaction effect of water and nitrogen, approach optimum management pattern and improve water and nitrogen use efficiencies under the degradable film mulching in arid desert drip irrigated farmland, two years’ experiments were conducted under degradable film mulching drip irrigation fields in Wulanbuhe sand areas, Inner Mongolia. There were three irrigation amount levels, including low (165 mm in 2016 and 195 mm in 2017), medium (247.5 mm in 2016 and 292.5 mm in 2017) and high (330 mm in 2016 and 390 mm in 2017), and three nitrogen levels: low nitrogen (140 kg/hm2), medium nitrogen (210 kg/hm2) and high nitrogen (280 kg/hm2) with three irrigation amount treatments under plastic film mulching as control, and the twelve treatments were randomized complete combination design. The effects of different water and nitrogen supplies on maize yield and water and nitrogen use efficiencies under degradable film mulching in arid sandy area were researched, and the coupling model of water and nitrogen about maize in drip irrigated farmland under degradable film mulching was established and optimized. The results showed that the water use efficiency (WUE) under degradable film mulching was significantly lower compared with that under plastic film mulching. However, there was no significant difference in yield, its components and partial productivity of nitrogen (PFPN) under sufficient water conditions. The irrigation and nitrogen amounts would significantly influence the maize yield and the components, WUE and PFPN under degradable film mulching. There were clearly interaction effect among different water and nitrogen treatments, and the lower irrigation amount would restrict nitrogen utilization. The PFPN and maize yield had an average of 36.87% and 37.18% increase in two years’ experiment when irrigation amount was changed from low to medium, however, it was just about 5.93% and 6.22% increase when the irrigation amount was changed from medium to high; the lower nitrogen application also would restrict soil water utilization, the WUE and maize yield had an average of 7.99% and 18.81% increase in two years’ experiment when nitrogen application was changed from low to medium, however, it was-3.66% for WUE, and just 3.35% for yield when nitrogen application was changed from medium to high; the maximum yield in 2016 and 2017 was 13 875.16 kg/hm2 and 13 805.02 kg/hm2, respectively, which were all in high irrigation amount and medium nitrogen application treatment. There were good dualistic and quadric regression relationship among irrigation amount, nitrogen application and yield under the degradable film mulching in arid desert drip irrigated farmland, and the determination coefficient R2 for 2016 and 2017 was 0.978 and 0.988, respectively. The main factor analysis for regression model revealed that the effect of irrigation on yield was greater than that of nitrogen, and the yield was increased first and then decreased with the increase of irrigation and nitrogen. The irrigation and nitrogen application under different target yields was obtained through model optimization. In the experiment, the optimum water and nitrogen ratio was high irrigation amount and medium nitrogen application treatment, and the yield was in target range of 13 000~14 000 kg/hm2 with relatively high WUE and PFPN. Therefore, it can be used as a reasonable technical and theoretical reference for the water and nitrogen management under the degradable film mulching in arid desert drip irrigated farmland. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Nitrogen

Controlled terms: Efficiency  -  Farms  -  Grain (agricultural product)  -  Irrigation  -  Landforms  -  Models  -  Plastic films  -  Regression analysis  -  Soil moisture

Uncontrolled terms: Arid desert farmland  -  Determination coefficients  -  Fertigations  -  Interaction effect  -  Nitrogen utilization  -  Nitrogen-use efficiency  -  Plastic film mulching  -  Yield

Classification code: 481.1 Geology

Geology

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  804 Chemical Products Generally

Chemical Products Generally

  -  817.1 Polymer Products

Polymer Products

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  913.1 Production Engineering

Production Engineering

  -  922.2 Mathematical Statistics

Mathematical Statistics

Numerical data indexing: Percentage 1.88e+01%, Percentage 3.35e+00%, Percentage 3.69e+01%, Percentage 3.72e+01%, Percentage 5.93e+00%, Percentage 6.22e+00%, Percentage 7.99e+00%, Size 1.65e-01m, Size 1.95e-01m, Size 2.02e+00m, Size 2.47e-01m, Size 2.92e-01m, Size 3.30e-01m, Size 3.90e-01m

DOI: 10.6041/j.issn.1000-1298.2018.07.031

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

18. Effect of Biochar on Decomposition Characteristics of Corn Stover Presoaked with Digestate in Soil

Accession number: 20184506044412

Title of translation: 生物炭对混施沼肥秸秆还田腐解特性的影响

Authors: Wang, Zhongjiang (1, 2); Wang, Zeyu (1); Zhang, Zheng (1); Lin, Guiying (3); Liu, Zhuo (1); Cui, Feng (1)

Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Heilongjiang Key Laboratory of Technology and Equipment for the Utilization of Agricultural Renewable Resources, Harbin; 150030, China; (3) Wuhan Optics Valley Bluefire New Energy Co., Ltd., Wuhan; 430070, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 279-285

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: A great number of crop straws are produced each year in China. Among all the comprehensive utilizations of crop straw, the method of returning straw to soil has been paied attention and accepted as a recycle technology featuring with increasing the porosity of soil, improving the aggregate structure of soil and increasing the production of crops. The most important indicator to evaluate the effect of straw returning is the decomposition condition of straw. Biochar and digestate were combined as accelerants to expedite the decay of corn stover. The corn stover presoaked with digestate was buried into the soil added with biochar by mesh bag method at room temperature. The experimental process lasted 105 d. The decomposition ratio of corn stover and the characteristics of cellulose, hemicellulose, lignin, organic carbon and total cumulative nitrogen were investigated systematically to achieve the effect of biochar on the decomposition characteristics of corn stover presoaked with digestate in soil. The results indicated that the biochar increased the decomposition rate of corn stover significantly. The decomposition condition of corn stover in sandy loam was better than that in loamy soil. The decomposition ratios of comparison samples were 69.96% for the corn stover in loamy soil, 74.63% for the corn stover in loamy soil added with biochar, 78.19% for the corn stover in sandy loam and 79.14% for the corn stover in sandy loam added with biochar, respectively. Furthermore, the decomposition ratio of corn stover was increased as the increase of time. The decomposition rate was fast before 49 d and decreased gradually after 49 d. The decomposition ratios of cellulose, hemicellulose and total cumulative nitrogen were different significantly (P © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 29

Main heading: Soils

Controlled terms: Cellulose  -  Crops  -  Nitrogen  -  Organic carbon  -  Soil conditioners

Uncontrolled terms: Bio chars  -  Burying and returning  -  Corn stover  -  Decomposition ratios  -  Digestate

Classification code: 483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  804 Chemical Products Generally

Chemical Products Generally

  -  804.1 Organic Compounds

Organic Compounds

  -  811.3 Cellulose, Lignin and Derivatives

Cellulose, Lignin and Derivatives

  -  821.4 Agricultural Products

Agricultural Products

Numerical data indexing: Percentage 7.00e+01%, Percentage 7.46e+01%, Percentage 7.82e+01%, Percentage 7.91e+01%

DOI: 10.6041/j.issn.1000-1298.2018.07.033

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

19. Analysis of Rope-twining Failure of Knotter Hook and Its Improved Design of Curved Surface Shape

Accession number: 20184506044389

Title of translation: 打结嘴缠绳故障分析与曲面形态改进设计

Authors: Yin, Jianjun (1); Ji, Zheng (1); Wang, Xinxin (1); Zhu, Hao (1)

Author affiliation: (1) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang; 212013, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 82-89

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming at the problems of rope-twining failure occurred in the process of ring-twining of the knotter hook, virtual knotting method was applied to analyze the influence of rope-lapping point position on the rope-griping plate and inclination angle of the boss on the knotter hook on ring-twining and rope-biting motion, which drew the conclusions that rope-lapping point position deviation was a main factor resulted in rope-twining failure of the knotter hook and decreasing inclination angle of the boss on the knotter hook was beneficial to avoid rope-twining failure of the knotter hook. The critical condition for the rope non-sliding upward along the boss curved surface on the knotter hook was established by force analysis, and inclination angle of the boss of the improved knotter hook was obtained. Based on boundary similarity and B-spline surface modeling method, the boss curved surface of knotter hook was reconstructed under CATIA software and the improved knotter hook model was obtained. Totally 600 knotting tests showed that the knotter hook model with 50° inclination angle of the boss had a better effect of restricting the rope to slide upward along the boss curved surface on the knotter hook, which can effectively prevent the rope-twining failure of the knotter hook. The knotter hook model with 50° inclination angle of the boss may improve the knotting reliability of the knotter, and provide a reference for the improved design of the knotter hook. To the ring-twining of the knotter hook with 60° inclination angle of the boss, rope-lapping point position deviation on the rope-griping plate should be controlled within ±3°. The knotter hook with 50° inclination angle of the boss allowed the rope-lapping point position deviation to range from-4.5° to 3°. They may provide a reference for the position control of rope-lapping point on the rope-griping plate. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Hooks

Controlled terms: Failure (mechanical)  -  Failure analysis  -  Lapping  -  Position control  -  Rope

Uncontrolled terms: B-spline surface models  -  Baler  -  Critical condition  -  Curved surface shapes  -  Curved surfaces  -  Improved designs  -  Inclination angles  -  Knotter

Classification code: 604.2 Machining Operations

Machining Operations

  -  731.3 Specific Variables Control

Specific Variables Control

DOI: 10.6041/j.issn.1000-1298.2018.07.010

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

20. Design and Performance Analysis of Electromagnetic Suspension Based on In-wheel Motor Car

Accession number: 20184506044426

Title of translation: 集成电磁悬架的轮毂驱动电动车垂向振动抑制方法研究

Authors: Wang, Ruochen (1); Yu, Feng (1); Shao, Kai (1); Meng, Xiangpeng (1); Ding, Renkai (1); Chen, Long (1)

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

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 382-389

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: A structure of electromagnetic suspension with in-wheel motor was proposed. This structure was aimed at conquering the unsprung mass increase because of the motor in wheel to worsen tire grounding and ride comfort. In addition, this structure was equivalent to dynamic vibration absorber, which can effectively share the road vertical excitation on the tire. Thus, the dynamic model of the electromagnetic suspension was established with in-wheel motor. The transfer characteristics and the performance indexes (vehicle acceleration and tire dynamic load) between the quality systems were analyzed by simulation. The results showed that the suspension system can effectively inhibit the wheel-type formant during the frequency domain, and make the wheel-shaped resonant frequency avoid falling in the most sensitive section of the human body: 4~12.5 Hz. Based on the structure, the actuator would use the sky-hook control strategy to improve the ride comfort. Compared with the conventional suspension, the body acceleration of new system was reduced by 23.1%, and tire dynamic load was decreased by 16.6%. In terms of modified structure and the sky-hook control strategy, the performance of ride comfort and tire grounding were improved obviously. Finally, the experiment was carried out on the single-aisle pedestals to verify the feasibility of the new structure and control method. The results showed that the negative effect of vertical vibration caused by the increase of the non-spring load of electric vehicle was suppressed by the new structure and new control method. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Suspensions (components)

Controlled terms: Automobile bodies  -  Automobile suspensions  -  Dynamic loads  -  Electric grounding  -  Frequency domain analysis  -  Hooks  -  Natural frequencies  -  Structural design  -  Tires  -  Traction motors   -  Vehicle performance  -  Vibrations (mechanical)  -  Wheels

Uncontrolled terms: Comfort  -  Dynamic vibration absorber  -  Electro-magnetic suspensions  -  In-wheel  -  Performance analysis  -  Sky-hook  -  Transfer characteristics  -  Vehicle acceleration

Classification code: 408.1 Structural Design, General

Structural Design, General

  -  601.2 Machine Components

Machine Components

  -  662.1 Automobiles

Automobiles

  -  662.4 Automobile and Smaller Vehicle Components

Automobile and Smaller Vehicle Components

  -  818.5 Rubber Products

Rubber Products

  -  921.3 Mathematical Transformations

Mathematical Transformations

  -  931.1 Mechanics

Mechanics

Numerical data indexing: Frequency 4.00e+00Hz to 1.25e+01Hz, Percentage 1.66e+01%, Percentage 2.31e+01%

DOI: 10.6041/j.issn.1000-1298.2018.07.047

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

21. Detection and Elimination of Yellow Spotted Cocoon in Mountage Based on FCM Algorithm and HSV Color Model

Accession number: 20184506044383

Title of translation: 基于FCM及HSV模型的方格蔟黄斑茧检测与剔除技术

Authors: Liu, Mochen (1, 2); Xu, Ronghao (1); Yan, Xiao (3); Yan, Yinfa (1, 2); Li, Fade (1, 2); Liu, Shuangxi (1)

Author affiliation: (1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai’an; 271018, China; (2) Shandong Provincial Key Laboratory of Horticultural Machinery and Equipment, Tai’an; 271018, China; (3) School of Electrical and Electronic Engineering, North China Electric Power University (Baoding), Baoding; 071003, China

Corresponding author: Yan, Yinfa(sd28@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 31-38

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In sericulture, cocoons must be detected and classified before silk reeling is performed. It is important for improving the quality of silk to eliminate the yellow spotted cocoons. A large number of checker cocooning are used for silkworm mounting cocooning frames. It is difficult to detect the yellow spotted cocoons because of the checker cocooning frames’ reshape and outer floss. To solve the problem, the algorithm based on FCM and HSV color model was used to detect and eliminate the yellow spotted cocoons in the cocoons harvested process. Firstly, FCM segmentation was applied to the original image of the checker cocooning frame to eliminate the outer floss and the frame. The binary image of the cocoon was obtained by FCM segmentation and threshold segmentation. The original image was masked with the binary image which was obtained by FCM segmentation. And the individual cocoon was extracted through the masked operation. According to the proportion of specific color components in the color histogram which was gotten by accumulating color of HSV, the yellow spotted cocoon was judged one by one. The center point coordinates of the yellow spotted cocoons’ regions were got by the connected components calibration, and were mapped into the world coordinates through the equation that image coordinates to world coordinates to get the cocoons positions in the Cartesian space. Finally, the yellow spotted cocoons were eliminated by automatic harvesting machine. According to the result of experiment, the correct ratio of cocoon detection was 81.2%, the location accuracy was 3.0 mm, the average process time of one mountage image was 1.271 s. The cocoons which out floss with leaf stalks or crushed leaves could be detected errorlessly, but the algorithm had no effect on detection the cocoons with stained point in the edge. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Edge detection

Controlled terms: Animals  -  Binary images  -  Color  -  Color codes  -  Graphic methods  -  Image segmentation  -  Silk

Uncontrolled terms: Color histogram  -  Connected component  -  Harvesting machines  -  Image coordinates  -  Mountage  -  Silkworm cocoons  -  Threshold segmentation  -  World coordinates

Classification code: 723.2 Data Processing and Image Processing

Data Processing and Image Processing

  -  741.1 Light/Optics

Light/Optics

  -  819.1 Natural Fibers

Natural Fibers

Numerical data indexing: Percentage 8.12e+01%, Size 3.00e-03m, Time 1.27e+00s

DOI: 10.6041/j.issn.1000-1298.2018.07.004

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

22. Design and Test of Path Tracking Controller Based on Nonlinear Model Prediction

Accession number: 20184506044382

Title of translation: 基于非线性模型的农用车路径跟踪控制器设计与试验

Authors: Liu, Zhengduo (1, 2); Zhang, Wanzhi (1, 2); Lü, Zhaoqin (1, 2); Zheng, Wenxiu (1, 2); Mu, Guizhi (1, 2)

Author affiliation: (1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai’an; 271018, China; (2) Shandong Provincial Key Laboratory of Horticultural Machinery and Equipment, Tai’an; 271018, China

Corresponding author: Lü, Zhaoqin(lzqsdau2003@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 23-30

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To improve the trajectory tracking performance of agricultural vehicles, a new path tracking control method based on the nonlinear model prediction was proposed. The path tracking problem was transformed into solving the trajectory planning and trajectory tracking control problems with satisfying speed and angle constraint. Firstly, the nonlinear kinematic model of agricultural vehicles was discretized, and the recursive model was derived as the predictive equation of the controller. Then the objective function which defined the system control quantities as the state quantities was set up. Finally, the prediction equation was brought into the objective function to transform the problem into a quadratic programming method based on the recursive sequence and the gradient computation was performed to solve the nonlinear constrained optimization. The closed-loop correction of controller was realized by real-time feedback and rolling optimization. Predictive control can be achieved by repeating the process. Matlab simulation results showed that the nonlinear model prediction controller can realize effective tracking and had strong robust stability. The comparison test with the linear model prediction controller indicated that with the control of the controller, the lateral deviation was reduced by 36.8% and the longitudinal deviation was reduced by 32.98% when the velocity was 3 m/s and tracking path was circular. At the same time, the corresponding field test was carried out and the results showed that when the test car was tracking the reference path with the velocity of 2 m/s, the maximum lateral deviation was-4.28 cm and when the velocity was 3 m/s, the maximum longitudinal deviation was-6.61 cm. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 27

Main heading: Controllers

Controlled terms: Agriculture  -  Constrained optimization  -  Constraint satisfaction problems  -  Forecasting  -  Kinematics  -  Mathematical transformations  -  MATLAB  -  Navigation  -  Nonlinear analysis  -  Nonlinear equations   -  Nonlinear systems  -  Quadratic programming  -  Trajectories  -  Vehicles

Uncontrolled terms: Agricultural vehicles  -  Closed-loop corrections  -  Model prediction  -  Nonlinear  -  Nonlinear constrained optimizations  -  Path tracking  -  Quadratic programming method  -  Trajectory tracking control

Classification code: 732.1 Control Equipment

Control Equipment

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  921 Mathematics

Mathematics

  -  921.3 Mathematical Transformations

Mathematical Transformations

  -  931.1 Mechanics

Mechanics

  -  961 Systems Science

Systems Science

Numerical data indexing: Percentage 3.30e+01%, Percentage 3.68e+01%, Velocity 2.00e+00m/s, Velocity 3.00e+00m/s

DOI: 10.6041/j.issn.1000-1298.2018.07.003

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

23. Space Stability Evaluation during Well-facilitated Farmland Consolidation

Accession number: 20184506044394

Title of translation: 高标准农田建设中耕地空间稳定性评价研究

Authors: Zhao, Suxia (1); Niu, Haipeng (1); Zhang, Hebing (1); Zhang, Xiaohu (1)

Author affiliation: (1) College of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo; 454000, China

Corresponding author: Niu, Haipeng(niuhaipeng1974@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 119-126

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: It is China’s significant means about the construction of well-facilitated farmland which stabilize agricultural production and ensure national food security. The natural quality condition and spatial stability of farmland are the important foundation on well-facilitated farmland construction. At present, the study about well-facilitated farmland emphasizes the natural quality of farmland, there is little research on the stability of spatial layout. It was occupied after the well-facilitated farmland was built, resulting in great waste. Therefore, it should be considered not only the natural endowments of farmland, but also the stability of its spatial layout about the well-facilitated farmland construction under the background of sustained and rapid socio-economic development. An empirical research was conducted in Xinzheng City to study spatial stability evaluation of well-facilitated farmland. In order to further improve the permanent stability of the well-facilitated farmland construction projects, the index system was established from different aspects of locational conditions of farmland, its convenience degree, land and urban plan constraint and ecology control, totally 10 indicators were selected during the evaluation. The results showed that the spatial stability level of well-facilitated farmland construction in Xinzheng City obtained by using niche-fitness model was consistent with the results of field investigation, and the validity of the model was verified. The key factors restricting of well-facilitated farmland space can be reflected perfectly, at the same time the limitation of the subjective empowerment in current evaluation model can be avoided. The theory provided a new method, which could extend the application range of the theory of ecological niche; according to the spatial stability suitability index, the spatial stability of well-facilitated farmland in Xinzheng City was divided into four grades: stability, relatively stability, relatively unstability and unstability, and 28 989.64 hm2 of the farmland was stable farmland, accounting for 53.52% of the city’s farmland; 9 075.89 hm2 of the farmland was relatively stable farmland, accounting for 16.76% of the city’s farmland; the relatively unstable and unstable farmland was 16 102.4 hm2, accounting for 29.72% of the city’s farmland. The grade of stability objectively reflected the possibility of farmland being occupied by construction and being destroyed by ecology, therefore, in order to ensure the permanent stability of the farmland, the well-facilitated farmland construction projects should be arranged in the stable region and the relatively stable region; from the spatial distribution, the farmland stability in the west and south was significantly higher than that in the north and east. The regions with poor spatial stability were mainly divided into urban areas, towns, industrial cluster areas and both sides of the road areas. With the development of the air harbour area, the stability of space in the eastern region would be decreased. The research results objectively reflected the spatial stability of farmland in different areas of Xinzheng City, which was in line with local reality. It can provide a scientific basis for the construction of well-facilitated farmland and the compilation of a new round of land consolidation planning. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Farms

Controlled terms: Ecology  -  Economics  -  Food supply  -  Petroleum reservoir evaluation  -  Stability  -  Urban planning

Uncontrolled terms: Agricultural productions  -  Construction projects  -  Farmland consolidations  -  Fitness modeling  -  Land consolidation planning  -  Socio-economic development  -  Space stability  -  Xinzheng City

Classification code: 403.1 Urban Planning and Development

Urban Planning and Development

  -  454.3 Ecology and Ecosystems

Ecology and Ecosystems

  -  512.1.2 Petroleum Deposits : Development Operations

Petroleum Deposits : Development Operations

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

  -  822.3 Food Products

Food Products

  -  971 Social Sciences

Social Sciences

Numerical data indexing: Percentage 1.68e+01%, Percentage 2.97e+01%, Percentage 5.35e+01%

DOI: 10.6041/j.issn.1000-1298.2018.07.015

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

24. Obstacle Avoidance Navigation Algorithm and Analog Experiment for Wheeled AGV Running along Vineyard Ridge Road

Accession number: 20184506044381

Title of translation: 轮式AGV沿葡萄园垄道行驶避障导航算法与模拟试验

Authors: Xie, Yongliang (1, 2); Yin, Jianjun (3); Yu, Chengchao (3); He, Kun (3); Hu, Xudong (1); Li, Renwang (1)

Author affiliation: (1) School of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou; 310018, China; (2) Department of Logistic Technology, Zhejiang Technical Institute of Economics, Hangzhou; 310018, China; (3) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang; 212013, China

Corresponding author: Yin, Jianjun(yinjianjun@ujs.edu.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 13-22

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming at the problem of obstacles threat for wheeled AGV tracking along a vineyard ridge road, based on distance measurement and heading angle detection, rolling optimization principle was used to propose an anti-collision obstacle avoidance navigation algorithm of wheeled AGV. Cross-arranged 8-way ultrasonic sensors were used to detect the boundaries of the ridge road and obstacles on the ridge road. The same obstacle matching, obstacle type criterion and trajectory prediction model of dynamic obstacle were put forward. The AGV lateral position deviation and heading deviation angle were used as inputs of fuzzy controller to obtain expected guidance angle of AGV front wheel, which provided a referenced heading angle for wheeled AGV to bypass obstacles. Based on the rolling optimization principle, the obstacle avoidance navigation strategies of adjusting heading deviation angle and vehicle speed were proposed, and the AGV navigation algorithm of bypassing static obstacles, avoiding dynamic obstacles by deceleration or parking of AGV were designed. The software of LabVIEW was used to develop the obstacle avoidance navigation algorithm program, and navigation data was sent to the PLC to control AGV steering in real-time. Simulation experiments showed that the navigation algorithm can make the AGV track with the mode of deviation rectification along preset path of ridge road, which can guide the AGV to avoid collision with obstacles on the ridge road, which verified the effectiveness of the navigation algorithms. It can provide a reference for anti-collision warning and obstacle avoidance technology of front-wheel guided vehicle like unmanned wheeled tractor to track along a ridge road. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Automatic guided vehicles

Controlled terms: Collision avoidance  -  Computer programming languages  -  Navigation  -  Roads and streets  -  Ultrasonic applications  -  Wheels

Uncontrolled terms: Collision with obstacle  -  Navigation algorithms  -  Navigation strategies  -  Obstacle avoidance algorithms  -  Prediction control  -  Rolling optimization  -  Trajectory prediction  -  Wheeled AGV

Classification code: 406.2 Roads and Streets

Roads and Streets

  -  601.2 Machine Components

Machine Components

  -  723.1.1 Computer Programming Languages

Computer Programming Languages

  -  731.6 Robot Applications

Robot Applications

  -  753.3 Ultrasonic Applications

Ultrasonic Applications

  -  914.1 Accidents and Accident Prevention

Accidents and Accident Prevention

DOI: 10.6041/j.issn.1000-1298.2018.07.002

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

25. Estimating Method of Crop Coefficient of Maize Based on UAV Multispectral Remote Sensing

Accession number: 20184506044396

Title of translation: 大田玉米作物系数无人机多光谱遥感估算方法

Authors: Han, Wenting (1, 2); Shao, Guomin (1, 2); Ma, Daijian (1, 2); Zhang, Huihui (3); Wang, Yi (1, 2); Niu, Yaxiao (1, 2)

Author affiliation: (1) College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) Institute of Soil and Water Conservation, Northwest A&F University, Yangling; Shaanxi; 712100, China; (3) Water Management and Systems Research Unit, USDA-ARS, Fort Collins; CO; 80526, United States

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 134-143

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Rapid acquisition of crop coefficient Kc is the key to estimation of field evapotranspiration (ET), in order to study the feasibility and applicability of unmanned aerial vehicle (UAV) multispectral remote sensing in estimation of maize crop coefficient, based on the data of field maize in experimental station, soil and meteorology in Zhaojun Town, Dalate Qi, Inner Mongolia in 2017, by using meteorological factors and crop canopy cover to correct dual crop coefficient method at different growth stages and different water stresses. The multi-spectral (blue, green, red, red edge, near IR, 475~840 nm) images from UAV were used to calculate vegetation indices (normalized difference vegetation index (NDVI), soil adjusted vegetation index (SAVI), enhanced vegetation index (EVI), simple ratio (SR) and green normalized difference vegetation index (GNDVI), visible atmospherically resistant index (VARI)) of maize in different growth stages (rapid growth stage, mid-growth stage and late growth stage). Thus the model relation of VIs and crop coefficient Kc could be established, and the effect of water stress on it was studied. Results demonstrated that maize growth period and water stress were two important factors influencing the VIs-Kc model. The correlation between VIs and Kc in different growth stages was different: under full irrigation condition, the correlation of VIs-Kc model in the rapid growth stage (R2 was 0.731 2~0.940 1, pc model from mid to late growth stage (R2 was 0.276 5~0.373 2,pc model in the rapid growth stage (R2 was 0.000 2~0.083 0, pc model from mid to late growth stage (R2 was 0.336 2~0.848 7,pc model: in the rapid growth stage, the correlation of VIs-Kc model for full irrigation maize (the maximum value of R2 was 0.940 1) was better than the correlation for water stress maize (the maximum value of R2 was 0.083 0); from mid to late growth stage, the correlation of VIs-Kc model for full irrigation maize (the maximum value of R2 was 0.373 2) was worse than the correlation for water stress maize (the maximum value of R2 was 0.848 7). The correlation of part of VIs and crop coefficient Kc was good; the descending order of correlation of VIs-Kc model for full irrigated maize in the rapid growth stage was SR, EVI, VARI, GNDVI and SAVI; the descending order of correlation of the VIs-Kc model for water stress maize from mid to late growth stage was SR, GNDVI, VARI, NDVI, SAVI and EVI; the correlation of SR and crop coefficient Kc was the best. Estimation of Kc based on UAV multispectral technology was feasible. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 35

Main heading: Vegetation

Controlled terms: Antennas  -  Crops  -  Evapotranspiration  -  Image enhancement  -  Irrigation  -  Remote sensing  -  Unmanned aerial vehicles (UAV)

Uncontrolled terms: Crop coefficient  -  Green normalized difference vegetation index  -  Maize  -  Multispectral remote sensing  -  Normalized difference vegetation index  -  UAV remote sensing  -  Vegetation index  -  Visible atmospherically resistant indices

Classification code: 652.1 Aircraft, General

Aircraft, General

  -  821.3 Agricultural Methods

Agricultural Methods

  -  821.4 Agricultural Products

Agricultural Products

Numerical data indexing: Size 4.75e-07m to 8.40e-07m

DOI: 10.6041/j.issn.1000-1298.2018.07.017

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

26. Test on Heat-collecting Performance of Solar Heat Collection and Release System with Water Cycling inside Hollow Plates in Chinese Solar Greenhouse

Accession number: 20184506044418

Title of translation: 日光温室中空板水循环集放热系统设计与集热性能试验

Authors: Xu, Weiwei (1); Ma, Chengwei (1, 2); Song, Weitang (1, 2); Cheng, Jieyu (1, 2); Wang, Pingzhi (1, 2)

Author affiliation: (1) College of Water Resources and Civil Engineering, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing; 100083, China

Corresponding author: Song, Weitang(songchali@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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 326-334

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: A solar heat collection and release system with water cycling inside hollow plates was developed to address the problems currently existed in these built-in water cycling installations for solar heat collection and release in a Chinese solar greenhouse (CSG). The feasibility of the system was theoretically analyzed and verified by using a simulation software to predict the thermal environment in a CSG. According to the theoretical calculation, the amount of heat collected by the developed system, which was installed in the CSG with polystyrene wall and the indoor floor area of 400 m2, can approach to approximately 350 MJ, thereby being sufficient to enhance the indoor temperature for 2~3 nights in a CSG. The heat-collecting performance of the system was then preliminarily analyzed through a field test. The results showed that the collecting efficiency can maximally reach 0.93. During heat accumulation period, water temperature rise in a sunny day was approximately double than that in a cloudy day. The convective heat transfer between hollow plates and indoor air had a significant effect on the heat collecting efficiency when solar radiation was weakened. The collected heat from the system was increased with the increase of water flow in a range of 3.3~5.9 m3/h. The hollow plate system investigated had lower construction cost and a simple practical design compared with conventional systems. Besides, this system did not occupy indoor cultivation area, which, as fabricated solar collector, was suitable for the transformation of traditional CSG. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Heat convection

Controlled terms: Collector efficiency  -  Computer software  -  Flow of water  -  Greenhouses  -  Heat storage  -  Plates (structural components)  -  Solar collectors  -  Solar energy  -  Solar heating

Uncontrolled terms: Chinese solar greenhouse  -  Collecting efficiency  -  Convective heat transfer  -  Conventional systems  -  Performance analysis  -  Simulation software  -  Solar greenhouse  -  Theoretical calculations

Classification code: 408.2 Structural Members and Shapes

Structural Members and Shapes

  -  631.1.1 Liquid Dynamics

Liquid Dynamics

  -  641.2 Heat Transfer

Heat Transfer

  -  657.1 Solar Energy and Phenomena

Solar Energy and Phenomena

  -  702.3 Solar Cells

Solar Cells

  -  723 Computer Software, Data Handling and Applications

Computer Software, Data Handling and Applications

  -  821.6 Farm Buildings and Other Structures

Farm Buildings and Other Structures

Numerical data indexing: Area 4.00e+02m2, Energy 3.50e+08J

DOI: 10.6041/j.issn.1000-1298.2018.07.039

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

27. Effect of Microwave Drying on Protein Subunits and Functional Properties of Enzyme-assisted Aqueous Extraction Processing Protein Rich Bean Powder

Accession number: 20184506044423

Title of translation: 微波干燥对生物解离富肽豆粉蛋白亚基及功能性的影响

Authors: Wang, Huan (1); Tong, Xiaohong (1); Zhong, Mingming (1); Qi, Baokun (1); Li, Yang (1, 2); Jiang, Lianzhou (1)

Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China; (2) Harbin Food Industry Research Institute, Harbin; 150028, 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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 363-368

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Biological dissociated soybean hydrolysates, which was yield in such of the enzyme-assisted aqueous extraction of soybean oil processing, was used as research object, and applied for spray and microwave drying of peptide-rich soybean protein meal powder, which was prepared under different conditions. The protein subunits of soybean meal composition, the rules of spatial conformation change of the protein phase volume, and the physical and functional properties of the peptide-rich soybean meal powder were in-depth investigated based on high performance liquid exclusion chromatography technology. Research results showed that the impact of spray-microwave drying conditions on the HPLC-SEC peak intensity was significant, and 18~44 ku proteins took 73.47%~89.36% of the total protein of the powder. The main component of soybean protein was globulin subunit, which was perhaps determined by the phase conversion rate, molecular collision between different proteins, aggregation opportunities and fibrosis at different spray speeds and microwave drying conditions, molecular weight of the enzyme dissociated soybean peptide-rich powder were also influenced under various conditions. In addition, the water solubility and dispersibility of biodissociated peptide-rich soy flour had similar trends under different microwave drying conditions, and reflected the same problem, which were related to the residual water content of the powder, the intensity of protein molecule movement, conformational changes, and aggregation and dissociation. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Drying

Controlled terms: Conformations  -  Enzymes  -  Extraction  -  Liquid chromatography  -  Microwave heating  -  Microwaves  -  Peptides  -  Soybean oil

Uncontrolled terms: Conformational change  -  Enzyme-assisted aqueous extractions  -  Exclusion chromatography  -  Functional properties  -  HPLC-SEC  -  Microwave drying  -  Molecular collisions  -  Residual water content

Classification code: 461.9 Biology

Biology

  -  711 Electromagnetic Waves

Electromagnetic Waves

  -  711.1 Electromagnetic Waves in Different Media

Electromagnetic Waves in Different Media

  -  801.4 Physical Chemistry

Physical Chemistry

  -  802.3 Chemical Operations

Chemical Operations

  -  804.1 Organic Compounds

Organic Compounds

DOI: 10.6041/j.issn.1000-1298.2018.07.044

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

28. Progress in Research on Biochar Affecting Soil-water Environment and Carbon Sequestration-mitigating Emissions in Agricultural Fields

Accession number: 20184506044380

Title of translation: 生物炭施用对农业生产与环境效应影响研究进展分析

Authors: Gou, Mangmang (1); Qu, Zhongyi (2, 3); Wang, Fan (2, 3); Gao, Xiaoyu (2, 3); Hu, Min (2, 3)

Author affiliation: (1) Water Conservancy and Civil Engineering Department, Inner Mongolia Technical College of Mechanics and Electrics, Huhhot; 010070, China; (2) Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Huhhot; 010018, China; (3) Institute of Irrigation and Drainage in Cold and Arid Regions, Inner Mongolia Agricultural University, Huhhot; 010018, China

Corresponding author: Qu, Zhongyi(quzhongyi@imau.edu.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 1-12

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Biochar has been widely used in soil improvement and carbon sequestration. It has great potential and has attracted much attention in the scientific field at home and abroad.However, the properties of biochar are not only affected by the sources of biomass materials, but also related to pyrolysis temperature and technology.At the same time, different biochar properties and soil conditions also greatly affect the effect of soil improvement and carbon sequestration.In this paper, progress in research on the biochar affecting soil and water environment and carbon sequestration in farmland is reviewed.The study summarize the research achievements of biochar in agriculture, carbon sequestration and reduction, and improvement of saline and alkaline land,analyze the existing problems and discuss the application of biochar in these fields in the future.The purpose of this study is to provide references for the wide application of biochar. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 86

Main heading: Saline water

Controlled terms: Agriculture  -  Carbon  -  Soil moisture

Uncontrolled terms: Agricultural fields  -  Bio chars  -  Carbon sequestration  -  Pyrolysis temperature  -  Research achievements  -  Saline soil  -  Scientific fields  -  Soil water

Classification code: 444 Water Resources

Water Resources

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

DOI: 10.6041/j.issn.1000-1298.2018.07.001

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

29. Automatic Primary Echo Position Detection on Ultrasound in Plant Stem with Mixed Difference of Akaike Information Criterion

Accession number: 20184506044398

Title of translation: 基于混合差分AIC算法的植物茎体超声回波位置检测

Authors: Lü, Danju (1, 2); Shi, Xinling (1); Dong, Yi (1); Wang, Yuemin (1); Wang, Xia (1); Wang, Chao (3)

Author affiliation: (1) School of Information Science and Engineering, Yunnan University, Kunming; 650091, China; (2) School of Big Data and Intelligent Engineering, Southwest Forestry University, Kunming; 650224, China; (3) College of Forestry, Southwest Forestry University, Kunming; 650224, China

Corresponding author: Shi, Xinling(lshi@ynu.edu.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 153-159

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Detecting the primary echo position is the basis of ultrasonic detection for plant stems. Due to the inhomogeneity and strong attenuation of plant stems,the ultrasonic propagation paths in them are more complex than those in the homogeneous medium, which makes the primary ultrasonic echo position difficult to detect. An improved Akaike of information criterion (AIC) was proposed to detect the position of the ultrasonic primary echo in plant stems. First of all, the improved algorithm was analyzed and its accuracy was verified by a set of simulated signals. Then, a set of cutting wood samples was taken to the ultrasonic detection in the process of the water absorption. The results showed that ultrasonic primary echo positions dynamically indicated changes of water content in wood. Finally, living sunflowers with different soil moistures were set to the ultrasonic detection from 09:00 to 19:00 in situ. The results showed that the soil moisture and the primary ultrasonic echo position had the positive correlation. Meanwhile, the results showed the ultrasonic detection of sunflower stems with different soil moistures were significantly distinct. When the soil was short of water, the primary echo position and the soil moisture both fluctuated greatly and accordantly, which was consistent with the physiological activities, switching from drought resistance regulation to normal water absorption and transpiration. In contrast, when the soil moisture was filling, the primary echo position and the soil moisture both vitiated slightly. Under this condition, it was found that the soil moisture reached minimum value and the primary echo position reached maximum values in 11:00-12:00, which were consistent with the dropped water content in stems to the minimum caused by the strongest transpiration at that time. Therefore, the primary echo position of plant stems detected by mixed difference AIC can be a feature to the dynamic detection of the growth status of plant stems. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 27

Main heading: Soil moisture

Controlled terms: Transpiration  -  Ultrasonic testing  -  Water absorption  -  Water content

Uncontrolled terms: Akaike information criterion  -  Information criterion  -  Physiological activity  -  Plant stems  -  Position detection  -  Positive correlations  -  Ultrasonic detection  -  Ultrasonic echo

Classification code: 461.9 Biology

Biology

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  753.3 Ultrasonic Applications

Ultrasonic Applications

  -  802.3 Chemical Operations

Chemical Operations

DOI: 10.6041/j.issn.1000-1298.2018.07.019

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

30. Matching Number of Blades between Impeller and Diffuser Blade Effect on Performance of Well Submersible Centrifugal Pump

Accession number: 20184506044392

Title of translation: 叶轮与导叶叶片数匹配对井用潜水泵性能的影响

Authors: Wang, Hongliang (1); Shi, Weidong (2); Yang, Yang (1); Zhou, Ling (1); Lu, Weigang (1)

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

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

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 103-111

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The number of impeller and diffuser blades has a great influence on the head and efficiency of the pump. The 250QJ140 type well submersible centrifugal pump was selected as the research object. By the combination of numerical calculation and experiment, under the variation of blade number of impeller and diffuser, the performance variation and internal flow field distribution of submersible pump were analyzed. Based on the principle of not changing other geometric parameters, 16 submersible pump models with two different combinations of blades were established. ANSYS ICEM software was used to structure each group of models separately, and then the ANSYS CFX commercial software was used to calculate the multi-working constant of each model. For each set of numerical calculation, standard k-ω turbulence model and standard wall function were selected to obtain the performance prediction values of each model under different operating conditions. Compared the predictions of the performance of each group, it can be found that the efficiency of submersible pump model was the highest when the number of impeller and guide vane was 7 at the rated flow rate. Under the low flow conditions and high flow conditions, the pump medium flow angle was changed. Under low flow conditions, increasing the number of blades of the impeller and guide vanes can improve blade rectification of the liquid medium, thereby improving the performance of submersible pumps used in wells. In the case of large flow rates, fewer impellers and guide vane blades were more capable of reducing the effect of the blade on the liquid media crowding. Prototype manufacturing and performance test were carried out under the condition of good performance in large flow conditions. The test results showed that the model performance was better. Under the rated flow conditions, the predicted values of head and shaft power were 2.4% and 1.6% lower than those of the test result, and the predicted efficiency was 1.1% higher than that of the test results. The overall changing trend of numerical prediction results and experimental results with the flow was consistent, which confirmed the numerical accuracy of the research. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 32

Main heading: Impellers

Controlled terms: Centrifugal pumps  -  Computational fluid dynamics  -  Computer simulation  -  Diffusers (optical)  -  Efficiency  -  Forecasting  -  Submersible pumps  -  Submersibles  -  Wall function  -  Well pumps

Uncontrolled terms: Blade numbers  -  Different operating conditions  -  K-Omega turbulence model  -  Numerical calculation  -  Numerical predictions  -  Performance prediction  -  Performance variations  -  Prototype manufacturing

Classification code: 601.2 Machine Components

Machine Components

  -  618.2 Pumps

Pumps

  -  674.1 Small Marine Craft

Small Marine Craft

  -  723.5 Computer Applications

Computer Applications

  -  741.3 Optical Devices and Systems

Optical Devices and Systems

  -  913.1 Production Engineering

Production Engineering

  -  921 Mathematics

Mathematics

Numerical data indexing: Percentage 1.10e+00%, Percentage 1.60e+00%, Percentage 2.40e+00%

DOI: 10.6041/j.issn.1000-1298.2018.07.013

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

31. Sub-soiling Experiment on Double Cropping and Conservation Tillage Adopted Area

Accession number: 20184506044386

Title of translation: 一年两熟地区保护性耕作深松试验

Authors: He, Ming (1); Gao, Huanwen (2); Dong, Peiyan (1); Cui, Dejie (3); Zhao, Wenge (1)

Author affiliation: (1) Qingdao Farm Machinery Management Bureau, Qingdao; 266021, China; (2) College of Engineering, China Agricultural University, Beijing; 100083, China; (3) College of Agronomy, Qingdao Agricultural University, Qingdao; 266109, China

Corresponding author: Gao, Huanwen(ghwbgs@126.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 58-63

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: From the sub-soiling experiment during five years (2013-2017), it is preliminarily approved that the yield was obviously increased by sub-soiling applied in the continual no-tillage field. The highest yield related with sub-soiling would be happened at current season of operation, searching totally eight harvest seasons, and six seasons had the highest yield at current season of sub-soiling. Adoption of sub-soiling in summer had 5.9% higher yield than no sub-soiling, and 2.3% higher than in autumn, besides, summer sub-soiling had better power using efficiency and lower operation cost. Therefore, summer sub-soiling had better prospect on extension, but the autumn sub-soiling would be preferentially adopted in drought summer and poor irrigation area. An outstanding event in the trial was the decline of yield increasing rate, for summer sub-soiling, the first year had 18% of yield increase, since then, the yield increasing rate was quickly declined to 6.3%, 3.9%,3.4% and 1.7% in the second, third, fourth and fifth year. The decline of yield increase rate reflected double aspects of sub-soiling influence. It had positive aspect by loosing soil and holding more water in the field, but also had negative aspect by depressing of sowing quality, reducing of soil organic matter content and soil bacteria. The negative influence would be accumulated year by year, thus yield increase rate was gradually declined. Sub-soiling was an energy consuming operation, from roughly calculation, while yield increase rate was lower than 2% around, adoption of sub-soiling became input larger than output. From the yield decline trend in the trial, at fifth year of continued summer sub-soiling, at third year of continued autumn sub-soiling, the yield increase rate would reach the turnoff point. To reasonably determine the period of sub-soiling, further experiment was necessary. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Cultivation

Controlled terms: Soil conservation  -  Soils

Uncontrolled terms: Autumn sub-soiling  -  Conservation tillage  -  Double cropping  -  Field experiment  -  Summer sub-soiling

Classification code: 483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  821.3 Agricultural Methods

Agricultural Methods

Numerical data indexing: Percentage 1.70e+00%, Percentage 1.80e+01%, Percentage 2.00e+00%, Percentage 2.30e+00%, Percentage 3.90e+00%, Percentage 5.90e+00%, Percentage 6.30e+00%

DOI: 10.6041/j.issn.1000-1298.2018.07.007

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

32. Influences of Biochar on Hydrodynamic Parameters of Meadow Black Soil

Accession number: 20184506044402

Title of translation: 生物炭对东北草甸黑土水分运动参数的影响

Authors: Wang, Ruiyin (1, 2); Wei, Yongxia (2, 3); Liu, Hui (3); Zhang, Yipeng (2); Ma, Decai (4); Li, Guanqi (5)

Author affiliation: (1) School of Science, Northeast Agricultural University, Harbin; 150030, China; (2) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (3) Key Laboratory of High Efficiency Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China; (4) Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai; 519082, China; (5) China Railway Southwest Research Institute Co., Ltd., Chengdu; 611731, China

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

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 186-194

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to study the effect of biochar on hydrodynamic parameters of northeast meadow black soil, five levels of biochar with different volume ratios (0, 2%, 4%, 6% and 8%) were added into soil. The geometric model was set up by using proportion of biochar and soil, and assumed that the soil and biochar all conformed to the VAN GENUCHTEN model, and the equation of soil water characteristic curve was deduced. And by the theory of MUALEM, the relative hydraulic conductivity equation and water diffusivity equation of soil were deduced. Compared experimental results with theoretical analysis results of soil water characteristic curve, it was showed that the porosity increased in soil was not caused by the pores of biochar, it was caused by biochar and surrounding soil aggregate or the gap produced by itself. Biochar was packaged by soil aggregate, made the saturation changed with matrix suction, was close to the saturation of soil without added. When the matrix suction was lower than 2 000 cm, biochar can greatly improve the water content of soil, but when the matrix suction was higher than 8 000 cm, biochar can reduce the water content of soil. Because the biochar packaged by surrounding soil aggregate, the theory model was modified according to the experimental results, and the relative hydraulic conductivity equation and water diffusivity equation were deduced. Soil water diffusivity experiment showed that the water diffusivity equation can accurately describe the hydraulic properties of soil that added biochar, and biochar can decrease the soil water diffusion. Finally, the equations of soil water characteristic and relative hydraulic conductivity were used, and the problem of rainfall infiltration was numerically calculated. The relative error of numerically simulated soil water content afetr rainfall with the results of field experiments was less than 13.3%. It was showed that the hydraulic properties of soil that added biochar can fit the equations of the deduced theoretical model. The research results of the soil hydrodynamic parameters of soil can provide the basis of agricultural soil and water conservation and utilization for the northeast black earth area. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 30

Main heading: Infiltration

Controlled terms: Aggregates  -  Diffusion in liquids  -  Finite element method  -  Hydraulic conductivity  -  Hydrodynamics  -  Rain  -  Soil conservation  -  Soil moisture  -  Water conservation

Uncontrolled terms: Bio chars  -  Black soil  -  Rainfall infiltration  -  Saturated water  -  Unsaturated hydraulic conductivity

Classification code: 406 Highway Engineering

Highway Engineering

  -  443.3 Precipitation

Precipitation

  -  444 Water Resources

Water Resources

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  632.1 Hydraulics

Hydraulics

  -  921.6 Numerical Methods

Numerical Methods

Numerical data indexing: Percentage 1.33e+01%, Percentage 2.00e+00%, Percentage 4.00e+00%, Percentage 6.00e+00%, Percentage 8.00e+00%, Size 2.00e+01m, Size 8.00e+01m

DOI: 10.6041/j.issn.1000-1298.2018.07.023

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

33. Design and Experiment of Auto-precision Feeding System for Piglets

Accession number: 20184506044384

Title of translation: 仔猪自动精细饲喂系统设计与试验

Authors: Zhang, Fu (1, 2); Wang, Yafei (1); Lü, Mei (3); Wang, Jun (1); Xu, Zihe (1); Chen, Xinhui (1)

Author affiliation: (1) College of Agricultural Equipment Engineering, Henan University of Science and Technology, Luoyang; 471003, China; (2) Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province, Luoyang; 471003, China; (3) Henan Heshun Automation Equipment Co., Ltd., Dengfeng; 452470, China

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 39-45

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The automatic feeding system was designed in order to solve the problems of high cost and low automation. The system was composed of mechanical body and control system. The mechanical body mainly consisted of the feeding motor, feeding screw device, the stirring motor, mixing blade and the water supply system. The control system was composed of mobile control terminal, controller control panel and controller. The control part of the system can control the mechanical body of automatic fine feeding device based on liquid level sensor and photoelectric sensor, which can realize real-time control of the blanking motor, feeding motor and water pump and automation of ingredients, stirring, feeding, and washing buckets in process of pig feeding. Automatic feeding device included dry mixing motor, controller, profile, angle code, dry silo, mixing blades, water pump, hopper, discharge chute, mixed mixing blades, hybrid motor, feeding trough, spiral blade, arrange ushering bearing, carbon pipe, coupling and other parts. The results showed that the system was stable and reliable, and the mixing of dry and wet materials was realized. The drop of the feeding system was proportional to the operation time of the motor, and the determination coefficient of the relationship of positive proportional function was 0.999 4 with motor at the speed of 150 r/min in the test. The actual amount of falling material was the same as that of theoretical calculation, and its error was within 5%. The rotation speed of the feeding system was measured at 50 r/min, 100 r/min, 150 r/min, 200 r/min and 250 r/min. The results showed that the quantity of the lower material reached the maximum at 200 r/min, and the rate was 0.133 t/h. Pig farms in Henan Province were taken as the test subject, totally 90 piglets were randomly divided into three groups of 30 piglets in the experiment. The average daily increment of piglets fed in the second and third weeks by the system was approximately twice of that of normal feeding. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Feeding

Controlled terms: Control systems  -  Controllers  -  Materials handling equipment  -  Mixing  -  Real time control  -  Water supply  -  Water supply systems

Uncontrolled terms: Automatic feeding  -  Automatic feeding systems  -  Determination coefficients  -  Liquid level sensors  -  Mobile controls  -  Photoelectric sensors  -  Piglet  -  Theoretical calculations

Classification code: 446.1 Water Supply Systems

Water Supply Systems

  -  691.1 Materials Handling Equipment

Materials Handling Equipment

  -  691.2 Materials Handling Methods

Materials Handling Methods

  -  731 Automatic Control Principles and Applications

Automatic Control Principles and Applications

  -  731.1 Control Systems

Control Systems

  -  732.1 Control Equipment

Control Equipment

  -  802.3 Chemical Operations

Chemical Operations

Numerical data indexing: Mass_Flow_Rate 3.35e-02kg/s, Percentage 5.00e+00%, Rotational_Speed 1.00e+02RPM, Rotational_Speed 1.50e+02RPM, Rotational_Speed 2.00e+02RPM, Rotational_Speed 2.50e+02RPM, Rotational_Speed 5.00e+01RPM

DOI: 10.6041/j.issn.1000-1298.2018.07.005

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

34. Response of Rice Dry Matter Accumulation to Water Consumption Process in Cold Black Soil Region

Accession number: 20184506044403

Title of translation: 寒地黑土区水稻植株干物质积累对耗水过程的响应

Authors: Liu, Hui (1, 2); Wei, Yongxia (2, 3); Ru, Chen (3)

Author affiliation: (1) School of Science, Northeast Agricultural University, Harbin; 150030, China; (2) Key Laboratory of High Efficiency Use of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China; (3) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China

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

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 195-204

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to explore the response of rice dry matter accumulation to the water consumption process in the cold black soil region, the rice water consumption test was performed by evapotranspiration in the rice irrigation test station in Heilongjiang Province in 2017. The U7(76) uniform test was conducted to analyze the influence of water consumption in each growth stage on rice dry matter quality and dry matter accumulation process deeply. The results showed that the order (from large to small) of the determinant coefficient of water consumption in each stage on rice dry matter quality was bloom, coupling effect of jointing and booting with bloom, jointing and booting, coupling effect of bloom with milk-ripe, coupling effect of filled tillering with bloom, coupling effect of filled tillering with jointing and booting, and filled tillering. During the rice vegetative growth stages, through the time the dry matter accumulation entered into the rapid growth stage and the maximum of growth rate, the water consumption affected the dry matter accumulation quality indirectly. Each additional millimeter of water consumption in filled tillering would shorten the time the dry matter accumulation entered into the rapid growth stage by 0.459 d; while each additional millimeter of water consumption in jointing and booting would speed up the dry matter accumulation in 0.011 3 g/d. During the reproductive growth stages, the direct effect of water consumption on the dry matter quality was greater than that of indirect effect. The effects of water consumption in each stage on rice yield and dry matter quality were the same, and the order from large to small was bloom, jointing and booting, filled tillering, milk-ripe, early tillering, and late tillering, while the water consumptions in jointing and booting stage and in bloom stage were negatively correlated with the economic coefficient. The result could provide theoretical basis for making the irrigation system in cold black soil region. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 27

Main heading: Water supply

Controlled terms: Blooms (metal)  -  Irrigation  -  Regression analysis  -  Soils

Uncontrolled terms: Black soil regions  -  Dry matter accumulation  -  Logistic growth  -  Path analysis  -  Rice  -  Water consumption

Classification code: 446.1 Water Supply Systems

Water Supply Systems

  -  483.1 Soils and Soil Mechanics

Soils and Soil Mechanics

  -  535.1.2 Rolling Mill Practice

Rolling Mill Practice

  -  821.3 Agricultural Methods

Agricultural Methods

  -  922.2 Mathematical Statistics

Mathematical Statistics

DOI: 10.6041/j.issn.1000-1298.2018.07.024

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

35. Calculated Model for Transforming Sprinkler Water Distribution from Flat Ground into Sloping Land

Accession number: 20184506044409

Title of translation: 平地向坡地转换喷灌水量分布计算模型研究

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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 252-260

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: It is difficult to measure water distribution for sprinkler irrigation on sloping land. Based on the formula for calculating sprinkler range on sloping land, according to the principle of water balance along spray direction, a calculated model for transforming sprinkler water distribution from flat ground into sloping land was proposed and validated by an experiment. The effects of sprinkler layout, sprinkler spacing, operating pressure and slope on sprinkler water distribution on sloping land were analyzed by using the model. The results showed that water distribution for the sprinkler triangular arrangement was more uniform than that for square layout, and the combined sprinkler irrigation water application uniformity for the sprinkler triangular arrangement was slightly higher than that for square layout. The combined sprinkler irrigation water application uniformity was decreased with the increase of sprinkler spacing. When the sprinkler was operated at low pressure, the combined sprinkler irrigation water application uniformity was relatively low, and the low uniformity cannot meet the requirement of sprinkler irrigation uniformity. The combined sprinkler irrigation water application uniformity was increased with the increase of sprinkler pressure. The effect of slope on water distribution and the combined sprinkler irrigation water application uniformity was insignificant within a certain slope. Therefore, if the Rainbird LF1200 sprinkler was used in the sprinkler irrigation system design on sloping land, it was recommended that the sprinkler spacing should be 1.0~1.2 times as the spraying range on flat ground with the triangular arrangement, and the sprinkler operating pressure should be 300 kPa. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Sprinkler systems (irrigation)

Controlled terms: Water  -  Water supply systems

Uncontrolled terms: Application uniformity  -  Operating pressure  -  Sloping land  -  Sprinkler irrigation  -  Sprinkler range  -  Triangular arrangements  -  Water balance  -  Water distributions

Classification code: 446.1 Water Supply Systems

Water Supply Systems

  -  821.1 Agricultural Machinery and Equipment

Agricultural Machinery and Equipment

Numerical data indexing: Pressure 3.00e+05Pa

DOI: 10.6041/j.issn.1000-1298.2018.07.030

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

36. Influence of Base Motion on Dynamic Performance of Parallel Adjustment Mechanism

Accession number: 20184506044211

Title of translation: 基座运动对并联调整机构动力学性能的影响

Authors: Yao, Jiantao (1, 2); Han, Bo (1); Dou, Yuchao (3); Zhang, Shuo (1); Xu, Yundou (1, 2); Zhao, Yongsheng (1, 2)

Author affiliation: (1) Parallel Robot Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao; 066004, China; (2) Key Laboratory of Advanced Forging and Stamping Technology and Science, Ministry of Education, Yanshan University, Qinhuangdao; 066004, China; (3) The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang; 050081, China

Corresponding author: Zhao, Yongsheng(yszhao@ysu.edu.cn)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 410-418

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to research the influence of the base motion on the dynamic performance of the parallel mechanism, the six DOFs parallel adjustment mechanism of the Shanghai 65 meters radio telescope was selected as the study object, through theoretical calculation and simulation analysis to get the result of the research. Firstly, the configuration of the parallel adjustment mechanism was introduced, and six position parameters of the moving platform were selected as the generalized coordinates of the system to describe the position and the posture of the moving platform. Secondly, the force influence of the movement of the base on the moving platform and each driving branch was deduced, and the change of the direction of gravity vector caused by the movement of the base was analyzed, the Kane method was used to establish the dynamic equations of the parallel adjustment mechanism in the case of base fixing and moving. At last, the structure of the parallel adjustment mechanism and its physical parameters were set, the numerical and simulation analysis were carried out by Matlab and ADAMS software, respectively, the driving force variation curve and the contrast curve of each driving branch were obtained in two cases. The results of the two software simulations were the same, which verified the correctness of the dynamical model, through the contrast of the curves, it was also found that the influence of base motion on system dynamics was obvious, and it should be considered during the he structural strength check and control system parameters setting, so that the reliability of the control system and the reliability of the structural strength can be improved. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 25

Main heading: Dynamics

Controlled terms: Control systems  -  Dynamic models  -  Fixed platforms  -  MATLAB  -  Mechanisms  -  Software reliability  -  Strength of materials

Uncontrolled terms: Adjustment mechanisms  -  Base moving  -  Driving forces  -  Generalized coordinates  -  Kane method  -  Parallel mechanisms  -  Software simulation  -  Theoretical calculations

Classification code: 511.2 Oil Field Equipment

Oil Field Equipment

  -  601.3 Mechanisms

Mechanisms

  -  731.1 Control Systems

Control Systems

  -  921 Mathematics

Mathematics

  -  951 Materials Science

Materials Science

Numerical data indexing: Size 6.50e+01m

DOI: 10.6041/j.issn.1000-1298.2018.07.051

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

37. Hand-held Device for Non-destructive Detection of Potato Quality Parameters

Accession number: 20184506044421

Title of translation: 便携式马铃薯多品质参数局部透射光谱无损检测装置

Authors: Wang, Fan (1); Li, Yongyu (1); Peng, Yankun (1); Yang, Bingnan (2); Li, Long (1); Yin, Xueqing (2)

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

Corresponding author: Li, Yongyu(yyli@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: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 348-354

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Based on the visible/near-infrared local transmission spectrum, a handheld multi-quality non-destructive inspection device for potatoes was independently developed, including a spectrum acquisition module, a light source module, a control and display module, a power supply module, and a black and white reference box. The entire device size was 11 cm×6.5 cm×9.5 cm. Totally eighty-five Atlantic potato samples were selected, and a partial least-squares quantitative prediction model of potato water, starch and reducing sugar was established based on the developed device. The correlation coefficients of potato water, starch and reducing sugar prediction model validation set were 0.927 8, 0.914 6 and 0.933 8, and the root mean square errors were 0.325 3%, 0.344 9% and 0.041 6%, respectively. Based on the QT development tool, the device real-time analysis and control software was written in C/C++ language. The potato water, starch and reducing sugar prediction models were built into the software. The real-time non-destructive detection of potato multi-parameter parameters was realized by one-button operation. Finally, the accuracy of the multi-quality non-destructive testing device for handheld potato was verified. The correlation coefficients between the predicted values of water content, starch and reducing sugar content of 20 potato samples and standard physical and chemical values were 0.914 1, 0.912 2 and 0.914 0, the root mean square errors were 0.352 7%, 0.340 4% and 0.040 0%, and the average deviations were 0.295 1%, 0.253 6% and 0.031 6%, respectively. The results showed that the potato multi-quality local transmission non-destructive testing device can realize the real-time non-destructive detection of potato moisture. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 25

Main heading: Quality control

Controlled terms: Bridge decks  -  C++ (programming language)  -  Display devices  -  Forecasting  -  Hand held computers  -  Least squares approximations  -  Light sources  -  Mean square error  -  Nondestructive examination  -  Palmprint recognition   -  Plasma diagnostics  -  Starch

Uncontrolled terms: Hand-held  -  Multiple quality  -  Nondestructive detection  -  Potato  -  Transmission spectrums

Classification code: 401.1 Bridges

Bridges

  -  722.2 Computer Peripheral Equipment

Computer Peripheral Equipment

  -  722.4 Digital Computers and Systems

Digital Computers and Systems

  -  723.1.1 Computer Programming Languages

Computer Programming Languages

  -  723.5 Computer Applications

Computer Applications

  -  804.1 Organic Compounds

Organic Compounds

  -  913.3 Quality Assurance and Control

Quality Assurance and Control

  -  921.6 Numerical Methods

Numerical Methods

  -  922.2 Mathematical Statistics

Mathematical Statistics

  -  932.3 Plasma Physics

Plasma Physics

DOI: 10.6041/j.issn.1000-1298.2018.07.042

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

38. Design and Test on No-tillage Planter Precise Hole Fertilization System

Accession number: 20184506044387

Title of translation: 免耕播种机精量穴施肥系统设计与试验

Authors: Wu, Nan (1, 2); Lin, Jing (1); Li, Baofa (1)

Author affiliation: (1) College of Engineering, Shenyang Agricultural University, Shenyang; 110866, China; (2) Department of Materials Engineering, Liaoning Mechatronics College, Dandong; 118009, China

Corresponding author: Lin, Jing(synydxlj69@163.com)

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

Abbreviated source title: Nongye Jixie Xuebao

Volume: 49

Issue: 7

Issue date: July 25, 2018

Publication year: 2018

Pages: 64-72

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: A hole fertilization system was designed to satisfy the technology demand on precise hole fertilization agriculture which applied a discrete element method software EDEM to simulate the hole fertilization controlling device. The result demonstrated that the mean hole distance was 24.90 cm, 23.79 cm and 23.28 cm, respectively, when planter speed was 3 km/h, 5 km/h and 7 km/h, and the soil opener working performance of the hole fertilization system was weakened as the speed of the planter was increased. Based on the hole fertilization controlling algorithm, the hole fertilization position controlling was achieved by adjusting the time interval between the seed out of the seed outlet and the fertilizer out of the fertilizer outlet (t3) and controlling the horizontal distance between the fertilizer and the seeds (a); the hole fertilization amount controlling was achieved by adjusting the opening and closing frequency of the fertilizer axis speed and the duckbill valve. Based on the orthogonal rotation design test of quadratic regression and the response surface methodology, the speed of the seeding machine, the opening and closing angle of the duckbill valve and the installment height of the hole fertilization device were taken as test factors, the precision of hole distance and the precision of the fertilization amount were taken as test indicators to implement the orthogonal test. The result showed that the precision of hole distance and the fertilization amount was 86.03% and 84.60%, respectively, when the speed of the seeding machine, the opening and closing angle of the duckbill valve and the installment height of the hole fertilization was 7 km/h, 33.37° and 17.30 cm when the hole fertilization was at optimum working performance. By testing on the precision of hole distance and the fertilization amount with the opening and closing angle and the installment of 33.37° and 17.30 cm, the speed of the planter as 3 km/h, 5 km/h and 7 km/h, the field validation test result was similar to the theoretical result. Furthermore, the precision of the hole fertilization controlling system was decreased slightly as the moving speed was increased and the precision of hole distance and the fertilization amount was 84.76% and 87.20%, respectively, which can satisfy the precision and amount controlling demands on the hole fertilization of corn. © 2018, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 33

Main heading: Testing

Controlled terms: Agriculture  -  Control systems  -  Fertilizers  -  Position control  -  Speed

Uncontrolled terms: Field validation tests  -  Hole fertilization  -  No-tillage planter  -  Orthogonal rotations  -  Orthogonal test  -  Quadratic regression  -  Response surface methodology  -  Working performance

Classification code: 731.1 Control Systems

Control Systems

  -  731.3 Specific Variables Control

Specific Variables Control

  -  804 Chemical Products Generally

Chemical Products Generally

  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control

Agricultural Equipment and Methods; Vegetation and Pest Control

Numerical data indexing: Percentage 8.46e+01%, Percentage 8.48e+01%, Percentage 8.60e+01%, Percentage 8.72e+01%, Size 1.73e-01m, Size 2.33e-01m, Size 2.38e-01m, Size 2.49e-01m, Velocity 1.39e+00m/s, Velocity 1.94e+00m/s, Velocity 8.33e-01m/s

DOI: 10.6041/j.issn.1000-1298.2018.07.008

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2018 Elsevier Inc.

Data Provider: Engineering Village

39. Design and Experiment of Vibrating Wolfberry Harvester

Accession number: 20184506044391

Title of translation: 振摇枸杞采收机设计与试验

Authors: Zhang, Wenqiang (1); Zhang, Mingming (1); Zhang, Junxiong (1); Li, Wei (1)

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

Corresponding author: Zhang, Junxiong(mech18@cau.edu.cn)

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