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2013年第44卷第8期共收录50篇 1. Accession number:20133316623787 Title:Field experiment platform for rear suspension Authors:Qiao, Xiaodong1 ; Wang, Xiaoyan1 ; Yan, Hua2 ; Li, Hongwen1 ; He, Jin1 ; Wang, Qingjie1 Author affiliation:1 Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment, China Agricultural University, Beijing 100083, China 2 Modern Agricultural Equipment Co., Ltd., Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China Corresponding author:Wang, X. (xywang@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:63-68 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:According to the problems of few test projects and test platforms in the existing rear suspension testing system, a tractive rear suspension multi-position rear suspension field experiment platform was designed on the basis of the relative design experience. Based on the statics principles, the suspension performance curves of hydraulic pressure three points were drawn. The steering operational, driving linearity and power output shaft with the highest speed under tractor, experiment platform, experiment suspending 2BDM-12 wheat specific row no-till dill and experiment suspending 2BMSF-12/6 no-till dill were tested in the field. The results showed that the steering operational, driving linearity and power output shaft with the highest speed had some changes but within allowed limits under four conditions. Therefore field experiment platform met the requirements of the rear suspension equipment tests in the field. Number of references:11 Main heading:Suspensions (components) Controlled terms:Equipment testing - Experiments Uncontrolled terms:Design experience - Experiment platforms - Field experiment - Hydraulic pressure - Rear suspension - Statics - Suspension performance - Test parameters Classification code:601.2 Machine Components - 901.3 Engineering Research - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments DOI:10.6041/j.issn.1000-1298.2013.08.011 Database:Compendex 2. Accession number:20133316623777 Title:PSO-fuzzy-hybrid control strategy of semi-active suspensions Authors:Yan, Tianyi1 ; Yan, Haijing1 ; Hou, Zhaomeng1 ; Wang, Yulin1 ; Zhang, Luzou1 ; Chen, Huanming1 Author affiliation:1 College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China Corresponding author:Yan, T. (yan_7012@126.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:1-7 73 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A half-car model of semi-active suspension systems with 4-DOF was designed in Matlab, and a fuzzy hybrid controller was built. Then, the membership functions and rule of fuzzy hybrid control strategy were optimized by particle swarm optimization (PSO). In order to verify the proposed control strategy, a series of experiments of PSO-fuzzy-hybrid control strategy on the platform of hardware-in-the-loop were carried out. It showed that compared with traditional fuzzy control strategy, PSO-fuzzy-hybrid control strategy enhanced the overall performance of the semi-active suspension system effectively, and obtained better control performance in all different road input excitations. Number of references:15 Main heading:Suspensions (components) Controlled terms:Active suspension systems - Fuzzy control - Hardware - Model automobiles - Particle swarm optimization (PSO) - Synthetic apertures - Vehicles Uncontrolled terms:Control performance - Control strategies - Fuzzy control strategy - Hard-ware-in-the-loop - Hybrid control strategies - Hybrid controller - Semi active suspension - Semi-active suspension systems Classification code:731 Automatic Control Principles and Applications - 723 Computer Software, Data Handling and Applications - 716.2 Radar Systems and Equipment - 921 Mathematics - 662.1 Automobiles - 601.2 Machine Components - 432 Highway Transportation - 605 Small Tools and Hardware DOI:10.6041/j.issn.1000-1298.2013.08.001 Database:Compendex 3. Accession number:20133316623799 Title:Force analysis of control volume in adaptive drip irrigation emitter Authors:Feng, Junjie1, 2 ; Fei, Liangjun1 ; Zhai, Guoliang2 ; Deng, Zhong2 ; Jia, Yanhui2 ; Sun, Hao2 Author affiliation:1 Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an 710048, China 2 Key Laboratory of Water-Saving Agriculture of Henan Province, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China Corresponding author:Feng, J. (fjjdg@sina.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:133-138 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:For theoretical analysis effect of self-adjustment flow on the adaptive drip irrigation emitter, the original size and pre-deformation deflection after fixed of the elastic adjustment diaphragm on the control volume were designed, and the total force to the elastic adjustment diaphragm based on description of its structure and working mechanism were analyzed. The theory and calculation method of mechanics to calculate the stress, the stiffness, the effective area of diaphragm and the sealing pressure ratio at interface of rubber adjustment diaphragm and energy dissipation hole were used. Then the actual sealing pressure ratio of the together control force was obtained. Results indicated that the minimum of actual sealing pressure ratio was 0.61 MPa at the combined action of the force produced from the pre-deflection and soil negative pressure of 20 kPa, but the computational theoretical sealing pressure ratio was 0.61 MPa too. The former was equal to the latter in both of them and met the condition of the actual sealing pressure ratio which was equal to or greater than the theoretical sealing pressure ratio. So the minimum of actual sealing pressure ratio was enough to maintain the drip emitter at the mode of initial shutoff water, and in a critical state of shutoff water and supply water. As long as soil negative pressure was bigger slightly when soil was drought little by little and it was equal to 21 kPa only or more than it, the actual sealing pressure ratio reduced to 0.54 MPa and far less than the theoretical sealing pressure ratio. Then the adaptive drip irrigation emitter began to drip water, and entered the mode of automatic regulation. So it had realized the effective of self-adjustment drip flow really at the same time. Number of references:24 Main heading:Diaphragms Controlled terms:Critical current density (superconductivity) - Energy dissipation - Irrigation - Soils - Stresses Uncontrolled terms:Adaptive - Automatic regulation - Combined actions - Control volumes - Drip emitter - Force analysis - Negative pressures - Working mechanisms Classification code:421 Strength of Building Materials; Mechanical Properties - 483.1 Soils and Soil Mechanics - 525.4 Energy Losses (industrial and residential) - 601.2 Machine Components - 701.1 Electricity: Basic Concepts and Phenomena - 821.3 Agricultural Methods DOI:10.6041/j.issn.1000-1298.2013.08.023 Database:Compendex 4. Accession number:20133316623778 Title:Design of draft sensor in big-power tractor raiser based on magnetostriction Authors:Li, Mingsheng1 ; Chi, Ruijuan1 ; Mao, Enrong1 ; Zhang, Jingying1 ; Liu, Yu1 Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China Corresponding author:Chi, R. (chiruijuan@vip.sina.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:8-12 32 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A kind of axial draft sensor was designed based on magnetostriction theory to improve the measuring accuracy of soil resistance. A mathematical model of sensor's exciting circuit was established based on ferromagnetics theory, Ampere's circulation and Ohm's law for magnetic path. Then the performances of sensor's output signal along with load were simulated by using Matlab/Simulink. 45-quenching steel and 40Cr-quenching steel were used as sensor's shell separately. Load experiment showed that the performance of the sensor, of which shell was 45-quenching steel, was better than the other. The better sensor's linearity determination coefficient of static characteristic curves was 0.995. The output voltage was 0.5 V when the shearing force was 70 kN. Number of references:15 Main heading:Sensors Controlled terms:Design - Magnetostriction - Mathematical models - Quenching - Tractors (truck) Uncontrolled terms:Determination coefficients - Ferromagnetics - Magnetic paths - Measuring accuracy - Output voltages - Shearing force - Simulation - Static characteristic Classification code:408 Structural Design - 537.1 Heat Treatment Processes - 663.1 Heavy Duty Motor Vehicles - 701.2 Magnetism: Basic Concepts and Phenomena - 801 Chemistry - 921 Mathematics DOI:10.6041/j.issn.1000-1298.2013.08.002 Database:Compendex 5. Accession number:20133316623819 Title:Structural synthesis of fully-decoupled two-translational and two-rotational parallel mechanisms Authors:Zhang, Yanbin1 ; Wu, Xin2 Author affiliation:1 School of Planning and Architectural Engineering, Henan University of Science and Technology, Luoyang 471003, China 2 School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China Corresponding author:Zhang, Y. (yanbin_zh@163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:250-256 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Based on the concept of hybrid mechanism and reciprocal screw theory, a method of structural synthesis of fully-decoupled two-translational and two-rotational (2T2R) parallel mechanisms was proposed and 106 parallel mechanisms were obtained. All mechanisms synthesyzed in this paper consisted of two limbs which were connected with the moving platform and the fixed base. One limb was a single open kinematic chain and another was a hybrid chain. Jacobian matrix of each mechanism was diagonal and there existed a one-to-one mapping relationship between the output velocity of platform and input of actuated joints. Therefore, these parallel mechanisms were fully-decoupled on kinematic solutions, which could avoid some drawbacks of the general paprallel mechanisms in terms of high coupling and complicated control design. Number of references:18 Main heading:Joints (structural components) Controlled terms:Fixed platforms - Jacobian matrices - Kinematics - Mechanisms - Screws Uncontrolled terms:Fully-decoupled - Hybrid mechanisms - Parallel mechanisms - Reciprocal screw theory - Structural synthesis Classification code:408.2 Structural Members and Shapes - 511.2 Oil Field Equipment - 601.3 Mechanisms - 605 Small Tools and Hardware - 921.1 Algebra - 931.1 Mechanics DOI:10.6041/j.issn.1000-1298.2013.08.043 Database:Compendex 6. Accession number:20133316623794 Title:Spatial parameters of knotters of square balers Authors:Li, Hui1 ; He, Jin1 ; Li, Hongwen1 ; Wang, Qingjie1 ; Cao, Qingchun2 ; Lu, Weijie2 Author affiliation:1 Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment, China Agricultural University, Beijing 100083, China 2 Henan Hao Feng Machinery Manufacturing Co., Ltd., Xuchang 461103, China Corresponding author:He, J. (hejin@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:99-105 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Spatial structure of the D-type knotter was studied based on its working sequence. Key spatial parameter relationships were confirmed to ensure the eight knotting processes going well through analyzing the knotter working principle, and the parameter model of knotter was build. Key spatial axes parameters were also designed by using mathematica 8.0 software, and two knotter frames were finally determined with different spatial parameters. The knotting experiments were carried out by using the two different knotter frames which were both assembled with the homogeneous New Holland parts, the results showed that, in the indoor experiment, the knotting rate of knotter frame I (KFI) was 1.0% lower than knotter frame II (KFII), while the average breaking force of the knot formed by the KFI was 13.9% higher than KFII at the same preload. In the field experiment, the knotting rate of KFI was decreased 4.0% in compared with KFII while its average breaking force was 2.5% higher than KFII. The average breaking force of the knot formed in the field was 94.2%-115.9% higher than indoor due to the different preloads and the additional extend force of the compressed straw baler. Number of references:21 Main heading:Experiments Uncontrolled terms:Field experiment - Indoor experiment - Knotter - Spatial parameters - Spatial structure - Square baler - Working principles - Working sequence Classification code:901.3 Engineering Research DOI:10.6041/j.issn.1000-1298.2013.08.018 Database:Compendex 7. Accession number:20133316623815 Title:Tridimensional green biomass measurement for trees using 3-D laser scanning Authors:Wang, Jia1 ; Yang, Huiqiao1 ; Feng, Zhongke1 Author affiliation:1 Institute of GIS, RS and GPS, Beijing Forestry University, Beijing 100083, China Corresponding author:Feng, Z. (fengzhongke@126.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:229-233 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A method applying 3-D laser scanning to estimate tridimensional green biomass of individual trees was proposed. For each objective tree, some tree parameters were obtained such as height, diameter at breast and crown width of an individual tree from cloud points, which were gotten from 3-D laser scanning. Then, through dividing crown into a plurality of irregular bodies, the volume of crown was regarded as the summation of volume of each body. Finally, the product of tridimensional green biomass and weighted average green looking rate from different perspectives and volume of tree crown was obtained. The method was tested on 13 trees, 6 species, and the results showed that the average tridimensional green biomass of broadleaf trees was 253.02 m3 and 146.75 m3 for coniferous trees. It was obvious that the average tridimensional green biomass of broadleaf trees was bigger than coniferous ones, which was contrary to results from traditional method. Number of references:16 Main heading:Forestry Controlled terms:Biomass - Laser applications Uncontrolled terms:Biomass measurements - Broadleaf trees - Coniferous trees - Crown volume - Individual tree - Laser scanning - Tridimensional green biomass of trees - Weighted averages Classification code:744.9 Laser Applications - 821.0 Woodlands and Forestry - 821.5 Agricultural Wastes DOI:10.6041/j.issn.1000-1298.2013.08.039 Database:Compendex 8. Accession number:20133316623820 Title:Kinematics analysis of 4-UPS-RPS spatial 5-DOF parallel mechanism Authors:Chen, Xiulong1 ; Sun, Xianyang1 ; Deng, Yu1 Author affiliation:1 College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China Corresponding author:Chen, X. (cxldy99@163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:257-261 267 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A 4-UPS-RPS spatial 5-DOF parallel mechanism, which could achieve three rotational DOF and two translational DOF, was introduced, and its kinematics analysis was carried out. 4-UPS-RPS parallel mechanism included five limbs, where four limbs were types of universal joint-prismatical joint-spherical joint, and the other was type of revolution-prismatical joint-spherical joint. The reverse solution of position analysis for the parallel mechanism was presented. On this basis, the Jacobian matrix and acceleration equation were derived, and the inverse position, velocity and acceleration of this parallel mechanism were obtained. Then the virtual simulation of mechanism kinematics was implemented by using ADAMS software. The simulation results showed that the numerical calculation results were correct. The research could provide a theoretical basis to promote application of 4-UPS-RPS parallel mechanism. Number of references:15 Main heading:Mechanisms Controlled terms:Computer simulation - Computer software - Jacobian matrices - Joints (anatomy) - Kinematics Uncontrolled terms:5-DOF - 5-DOF parallel mechanisms - Acceleration equations - Kinematics analysis - Numerical calculation - Parallel mechanisms - Translational DOF - Virtual simulations Classification code:461.3 Biomechanics, Bionics and Biomimetics - 601.3 Mechanisms - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921.1 Algebra - 931.1 Mechanics DOI:10.6041/j.issn.1000-1298.2013.08.044 Database:Compendex 9. Accession number:20133316623803 Title:Identification model of severely unstorable indica paddy based on combined kernel function Authors:Shi, Lijuan1 ; Xie, Biaobiao2 ; Xie, Xin'gang3 ; Wu, Yang3 Author affiliation:1 College of Science, Huazhong Agricultural University, Wuhan 430070, China 2 School of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China 3 College of Engineering, Huazhong Agricultural University, Wuhan 430070, China Corresponding author:Xie, X. (xxg@mail.hzau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:165-168 194 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:In order to explore a rapid and non-destructive method for identifying storable quality of indica paddy, experiments were conducted on 80 samples of severely unstorable indica paddy and 80 samples of other indica paddy. Support vector machine (SVM) method was selected to build qualitative model according to training samples' characteristics. A combined kernel function was defined after analyzing and studying different kernel function. The proposed combined kernel function was the linear combination of polynomial function and radial basis function, and it combined each advantage of these two functions to acquire both interpolation and extrapolation properties of kernel function. The experiments showed that the model had the best comprehensive performance when the linear combination polynomial function and radial basis function was taken as the kernel function of SVM, and the control factor was 0.7. The training identification rate was 97.21%, and the test identification rate was 93.25%. Number of references:10 Main heading:Support vector machines Controlled terms:Experiments - Functions - Near infrared spectroscopy - Nondestructive examination - Radial basis function networks Uncontrolled terms:Combined kernel function - Comprehensive performance - Identification rates - Indica paddy - NIR spectroscopy - Nondestructive methods - Qualitative model - Radial basis functions Classification code:421 Strength of Building Materials; Mechanical Properties - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 801 Chemistry - 901.3 Engineering Research - 921 Mathematics DOI:10.6041/j.issn.1000-1298.2013.08.027 Database:Compendex 10. Accession number:20133316623801 Title:Effect on characteristics of biomass pellet fuel for short-term storage Authors:Tian, Yishui1 ; Zhang, Zhongbo1 ; Zhao, Lixin1 ; Yao, Zonglu1 ; Meng, Haibo1 Author affiliation:1 Key Laboratory of Energy Resource Utilization from Agricultural Residues, Ministry of Agriculture, Chinese Academy of Agricultural Engineering, Beijing 100125, China Corresponding author:Zhao, L. (zhaolixin5092@gmail.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:143-147 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:In China, there are great difference in temperature and humidity in different regions. During the storage time, the characteristic of biomass pellet fuel will change, so the application of the fuel will also change. The corn stalks and wood pellet were tested with different storage method, temperature and humidity. The results showed that during the storage time, the temperature, humidity and storage method were the main factors which affected the total moisture of pellet fuel. When the humidity was larger than 70%, the corn stalks will appear mildew. The wood pellet will crack and mildew under the condition of high temperature and humidity. Number of references:10 Main heading:Fuel storage Controlled terms:Atmospheric humidity - Biomass - Energy storage - Fuels - Fungi - Pelletizing - Temperature Uncontrolled terms:Biomass pellet fuels - Corn stalk - High temperature - Pellet fuels - Storage time - Temperature and humidities - Wood pellet Classification code:802.3 Chemical Operations - 702 Electric Batteries and Fuel Cells - 641.1 Thermodynamics - 525.1 Energy Resources and Renewable Energy Issues - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 461.9 Biology - 443.1 Atmospheric Properties DOI:10.6041/j.issn.1000-1298.2013.08.025 Database:Compendex 11. Accession number:20133316623825 Title:Coupling compensation of transmission error for planetary gear Authors:Wang, Chaobing1 ; Chen, Xiaoan1 ; Li, Yunsong2 ; Chen, Hong1 Author affiliation:1 State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China 2 Chongqing Radio and TV University, Chongqing 400052, China Corresponding author:Chen, X. (xachen@cqu.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:287-292 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Eccentric error of planetary gear was transformed into equivalent mesh error on meshing line by geometry method. Then coupling error of every equivalent mesh error was calculated and deduced when angular frequency was 0, same and different. The best compensational effect was obtained with the first two cases. The value range of the difference among initial phase errors were concluded when the coupling error could be effectively compensated and the relationship of initial phase with the best compensation. Furthermore, assembling method by allocating initial phase error was proposed, which could improve transmission accuracy of planetary gear. The transmission errors of planetary gear were calculated with allocating assembly, random assembly and machining precision improvement, respectively. The comparison and analysis proved that the proposed method was effective and economical through. Number of references:15 Main heading:Error compensation Controlled terms:Error detection - Geometry - Spur gears Uncontrolled terms:Angular frequencies - Assembling method - Comparison and analysis - Coupling errors - Machining precision - Phase error - Planetary Gears - Transmission error Classification code:60.2 Machine Components - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 921 Mathematics DOI:10.6041/j.issn.1000-1298.2013.08.049 Database:Compendex 12. Accession number:20133316623786 Title:Optimized design of plough body structural and working parameters Authors:Zhai, Lixin1 ; Ji, Changying2 ; Ding, Qishuo2 ; Yu, Yinmei2 Author affiliation:1 Faculty of Mechanical and Electrical Engineering, Jinling Institute of Technology, Nanjing 211169, China 2 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China Corresponding author:Ji, C. (chyji@njau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:57-62 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Plowing in rheological soil is a unique tillage practice in humid or water logged agricultural production regions in China. System optimization of moldboard plough for rheological soil condition is necessary for improving its performance and providing a reduced draft and minimized energy consumption. An orthogonal test using four factors with three levels was conducted to optimize plough body structural and working parameters. Significant influence of tillage depth on the plough's performance was observed in the experiment. The optimum working condition occurred at a forwarding speed of 0.8 m/s and a tillage depth of 20 cm. This result was further evaluated and optimized with computer simulation, from which the structural parameters such as pushing angle, cutting angle, covering angle and height of plow were optimized. The simulation results proved that tilling rheological soil with a plow having a cutting angle of 35°, pushing angle of 90°and plow height of 200 mm provided the minimum specific draft of tillage, which was 0.6 N/cm2. Number of references:21 Main heading:Optimization Controlled terms:Agricultural machinery - Agriculture - Computer simulation - Energy utilization - Rheology - Soils Uncontrolled terms:Agricultural productions - Optimization design - Optimum working conditions - Orthogonal test - Parameter - Plough body - Structural parameter - System optimizations Classification code:931.1 Mechanics - 921.5 Optimization Techniques - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.5 Computer Applications - 525.3 Energy Utilization - 483.1 Soils and Soil Mechanics DOI:10.6041/j.issn.1000-1298.2013.08.010 Database:Compendex 13. Accession number:20133316623810 Title:Probiotic functions and structure changes of recrystallised sweet potato starches before and after in vitro digestion Authors:Xie, Tao1 ; Zhang, Shuyuan1 ; Wang, Meigui1 ; Nie, Chaonan1 ; Liu, Hui1 Author affiliation:1 College of Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China Corresponding author:Xie, T. (xt1105@yahoo.com.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:202-206 218 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The probiotic function and structural properties of recrystallised sweet potato starch before and after in vitro digestion were studied. The results demonstrated that the annealed, temperature-cycled and heat-moisture treated sweet potato starches before and after in vitro digestion could resist the degradation of tract enzymes and selectively promoted the proliferation of Lactobacillus, Bifidobacterium, Fecal streptococci and Clostridium septicum in human feces. Compared with the annealed, temperature-cycled and heat-moisture treated sweet potato starches, the digested annealed, temperature-cycled and heat-moisture treated sweet potato starches possessed the more stable structure as well as the higher selective proliferation of probiotics. Therefore, the recrystallised sweet potato starches could accord with the conditions of prebiotic, and be further studied as the new prebiotic product. Number of references:23 Main heading:Starch Controlled terms:Annealing - Moisture - Recrystallization (metallurgy) - Structural properties Uncontrolled terms:Bifidobacterium - Fecal streptococci - Human feces - In-vitro digestions - Prebiotics - Stable structures - Structure change - Sweetpotato starch Classification code:408 Structural Design - 531.1 Metallurgy - 537.1 Heat Treatment Processes - 801.4 Physical Chemistry - 804.1 Organic Compounds - 951 Materials Science DOI:10.6041/j.issn.1000-1298.2013.08.034 Database:Compendex 14. Accession number:20133316623783 Title:Driving simulator of articulated underground mining vehicle based on OGRE Authors:Liu, Li1 ; Liu, Xuewei1 ; Meng, Yu1 Author affiliation:1 School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China Corresponding author:Liu, L. (liliu@ustb.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:38-44 68 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Taking a self-developed articulated underground mining vehicle as prototype, the driving simulation scene model, 3-D vehicle model and tunnel model were established for the working environment of underground vehicles. A 3-DOF kinematics and dynamics nonlinear discrete model was built up to ensure the real-time driving simulator and reality. The models and the scene were driven by using an open-source graphics engine and an object-oriented graphics rendering engine. Ray casting method was used to virtualize the laser measurement sensors in simulator so that it could provide support for intelligent technique research of underground mining vehicle. Number of references:15 Main heading:Automobile simulators Controlled terms:Virtual reality Uncontrolled terms:Driving simulator - Intelligent techniques - Kinematics and dynamics - Laser measurement sensors - Nonlinear discrete model - Underground mining - Underground vehicles - Working environment Classification code:662 Automobiles and Smaller Vehicles - 663 Buses, Tractors and Trucks - 723 Computer Software, Data Handling and Applications DOI:10.6041/j.issn.1000-1298.2013.08.007 Database:Compendex 15. Accession number:20133316623812 Title:Optimal technological parameters of microwave enzyme inactivation for potato slices Authors:Liu, Wei1 ; Zhang, Xiaoyan1 ; Yang, Yang1 ; Cao, Youfu1 ; Zhao, Fengmin1 ; Yang, Bingnan1 Author affiliation:1 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China Corresponding author:Yang, B. (yangbn@caams.org.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:213-218 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Effect of three factors (microwave anode current source, microwave process time and potato thickness) on comprehensive quality of potato slices was studied. Quadratic regression orthogonal rotary combination design method and response surface methodology were used to obtain the optimum technological parameters, which were as follows: microwave anode current source of 161.78 mA, microwave process time of 10.19 s, and potato thickness of 2.88 mm. Verification results showed good fitting degree of the regression model. Results showed that with the optimum technological parameters, microwave enzyme inactivation technology could reduce the activity of polyphenol oxidase and maintain good sensory quality of potato slices. Number of references:11 Main heading:Microwaves Controlled terms:Enzymes - Regression analysis - Surface properties Uncontrolled terms:Combination design - Comprehensive qualities - Enzyme inactivation - Potato - Quadratic regression - Response surface methodology - Technological parameters - Verification results Classification code:711 Electromagnetic Waves - 804.1 Organic Compounds - 922.2 Mathematical Statistics - 951 Materials Science DOI:10.6041/j.issn.1000-1298.2013.08.036 Database:Compendex 16. Accession number:20133316623780 Title:Uncertainty propagation and parameter optimization of power system in hybrid electric vehicle Authors:Wang, Tingting1 ; Chen, Xiaokai1 ; Lin, Yi2 Author affiliation:1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China 2 Beijing Automotive Technology Center, Beijing 100021, China Corresponding author:Lin, Y. (linyi@bjev.com.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:21-26 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:According to the working characteristic of hybrid electric vehicle (HEV) in different conditions, the multidisciplinary design optimization (MDO) method in parameter optimization of power system of HEV under uncertainty was studied. To estimate the impact of uncertain input parameters on objectives of drive power system by performing the Monte Carlo simulation. The aggregate preference function of objectives and corresponding constraint equation were constructed to satisfy the designers' preference and engineering design. The power system parameters were optimized by using analytical target cascading (ATC) method which could hierarchically decompose and collaboratively optimize the system. The results showed that the values of vehicle's performance and the power system design could be optimized currently. Number of references:14 Main heading:Optimization Controlled terms:Design aids - Hybrid vehicles - Monte Carlo methods - Vehicles Uncontrolled terms:Analytical target cascading - Hybrid power systems - Multidisciplinary design optimization - Parameter optimization - Uncertainty propagation Classification code:432 Highway Transportation - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 922.2 Mathematical Statistics DOI:10.6041/j.issn.1000-1298.2013.08.004 Database:Compendex 17. Accession number:20133316623800 Title:Rapid detection of net calorific value for wheat straw under different NIRS collection conditions Authors:Yang, Zengling1 ; Xue, Junjie1 ; He, Cheng1 Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China Corresponding author:Yang, Z. (yangzengling@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:139-142 132 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A total of 71 wheat straw samples of different varieties were collected from different locations of China. 54 samples were selected as calibration set, and the rest 17 samples were taken as validation set. Static and simulated online quantitative analysis models of net calorific value of wheat straw were established in laboratory by two different near-infrared spectrometers-Spectrum 400 and Antaris Target, respectively. Spectrum 400 was used for rapid detection in a static mode. The determination coefficient and the relative analysis error of calibration set were 0.90 and 2.75. Antaris Target was used to simulate on-line detection. The determination coefficient and the relative analysis error of calibration set were 0.93 and 3.26. Moreover, the static and simulated online models were compared and discussed. Number of references:18 Main heading:Straw Controlled terms:Calibration - Calorific value - Computer simulation Uncontrolled terms:Determination coefficients - Net calorific value - On-line detection - Online models - Quantitative analysis model - Rapid detection - Relative analysis - Wheat straws Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 821.5 Agricultural Wastes - 723.5 Computer Applications - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels DOI:10.6041/j.issn.1000-1298.2013.08.024 Database:Compendex 18. Accession number:20133316623795 Title:Soil thermal field simulation and temperature node positions research of T-TDR sensors Authors:Han, Wenting1 ; Qiao, Jun1 ; Xu, Jinghui2, 3 Author affiliation:1 College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China 2 College of Water Resources and Architectural Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China 3 Institute of Water Saving Agriculture in Arid Regions of China, Northwest A and F University, Yangling, Shaanxi 712100, China Corresponding author:Han, W. (hanwt2000@126.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:106-111 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The measurement accuracy of T-TDR sensor was improved via studying the heat conduction process and optimizing the embedded point of the thermocouple nodes. Using 2-D heat transfer equation in the soil, the initial boundary value of the Heat Transfer of the T-TDR probe was analyzed numerically. Then the relationship between the thermal field of T-TDR with time, thermal conductivity and capacity of soil was established. Furthermore, the dynamic process of heat transfer and spatial thermal distribution of T-TDR at different environment temperature, conductivity and volumetric heat capacity were simulated. The results showed that the optimal positions of the thermocouple node on both sides were on the probe midpoint at 2 mm thermocouple junction of the sensor terminal direction distance. This was the most sensitive point to the radiant heat of the intermediate probe. Number of references:26 Main heading:Thermal conductivity Controlled terms:Heat transfer - Optimization - Probes - Soil moisture - Temperature sensors - Thermocouples - Thermoelectricity Uncontrolled terms:Environment temperature - Heat transfer equations - Initial boundary value - Soil temperature - Thermal conduction - Thermal field - Thermocouple junctions - Volumetric heat capacity Classification code:944.5 Temperature Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921.5 Optimization Techniques - 641.2 Heat Transfer - 615.4 Thermoelectric Energy - 483.1 Soils and Soil Mechanics DOI:10.6041/j.issn.1000-1298.2013.08.019 Database:Compendex 19. Accession number:20133316623813 Title:Investigation of thermal environment in greenhouse based on fan coil unit forced-air heating system Authors:Wang, Qian1 ; Guo, Zeyu1 ; Ji, Hengsong1 ; Cheng, Shan1 ; Zhang, Chengcheng1 Author affiliation:1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China Corresponding author:Wang, Q. (qwang@ujs.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:219-223 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:In order to further improve overall heating efficiency of the greenhouse heating system, a hot air heating system which used the biomass boiler as a heat source and the fan coil as the end of the cooling device was presented. Combined with experiment greenhouse, a CFD model about this greenhouse without plants was set up. After that, a CFD simulation was carried out by using this CFD model. After compared with the simulation results and experimental data, it was found that the overall trend of the temperature in the greenhouse was consistent. Error of each point was less than 3°C, and the root mean square error was 0.66°C. The results indicated that the CFD model was effective. The results showed that the forced-air heating system could effectively improve the indoor temperature. The temperature range of plant growth area was 12-17°C. The plant canopy temperature was evenly distributed without larger gradient. Number of references:11 Main heading:Greenhouses Controlled terms:Computational fluid dynamics - Computer simulation - Heating equipment - Mean square error Uncontrolled terms:Experimental datum - Greenhouse heating - Heating efficiencies - Heating system - Indoor temperature - Root mean square errors - Temperature range - Thermal environment Classification code:402.1 Industrial and Agricultural Buildings - 642.2 Industrial Furnaces and Components - 723.5 Computer Applications - 731.1 Control Systems DOI:10.6041/j.issn.1000-1298.2013.08.037 Database:Compendex 20. Accession number:20133316623785 Title:Effects of no-till opening seedbed on crop growth in annual double cropping areas in northern China Authors:He, Jin1 ; Wang, Qingjie1 ; Li, Hongwen1 ; Lu, Caiyun1 ; Qiao, Xiaodong1 ; Lu, Zhanyuan2 Author affiliation:1 Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment, China Agricultural University, Beijing 100083, China 2 Inner Mongolia Academy of Agriculture and Animal Husbandry, Huhhot 010031, China Corresponding author:Li, H. (lhwen@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:50-56 62 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The effect of no-till (NT) opening seedbed characteristics on soil moisture, crop growth, yield and water use efficiency (WUE) was studied in the field experiment at Daxing in Beijing in 2008-2010. The results indicated that no-till opening seedbeds could increase the capacity of water storage. Compared with traditional tillage seedbed, volumetric soil water content increased by 0.2%-2.7% in 0-30 cm soil layer and the crops growth were also promoted. The best results were achieved by the seedbed of NT with the opening depth of 20 cm. Compared with traditional tillage seedbed, NT with the opening depth of 20 cm increased winter wheat yield and WUE by 2.4% and 7.4%, and summer maize yield and WUE by 1.2% and 1.5%, respectively. The study showed that 20 cm could be the suitable opening depth for no-till seeding in northern China plain. Number of references:24 Main heading:Crops Controlled terms:Agricultural machinery - Soil moisture - Water content - Water supply Uncontrolled terms:Growth characteristic - No-till - Seedbed - Water use efficiency - Yield Classification code:444 Water Resources - 446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products DOI:10.6041/j.issn.1000-1298.2013.08.009 Database:Compendex 21. Accession number:20133316623792 Title:Online pesticide mixer with mixing ratio feedback based on light permeability of pesticides Authors:Jia, Weidong1 ; Chen, Zhigang1 ; Zhao, Xin2 ; Qiu, Baijing1 ; Wu, Chundu3 Author affiliation:1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China 2 School of Electronic and Information Engineering, Jiangsu University, Zhenjiang 212013, China 3 Yangzhou Vocational College of Environment and Resources, Yangzhou 225127, China Corresponding author:Chen, Z. (chenzg@ujs.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:90-93 164 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A pesticide mixing ratio detection unit based on light permeability of pesticides, a pesticide injection device controlled by PWM duty cycleand a low power consumption control unit based on single chip microcomputer MSP430F149 were designed. A performance test and a calibrating experiment were conducted for each unit. An online pesticide mixer with mixing ratio feedback was constructed and a fixed-point tracking experiment on the Paraquat SL mixing pesticide and water by 1:200 was conducted. The result showed that the online pesticide mixer developed by the method of online mixing pesticide with mixing ratio feedback based on light permeability of pesticides could acquire mixing ratio information in time, automatically adjust injection volume of pesticides, accurately track the set of mixing ratio, and effectively meet the requirement of online mixing pesticides. Number of references:18 Main heading:Pesticides Controlled terms:Experiments - Mixers (machinery) - Mixing Uncontrolled terms:Feed-back based - Injection volume - Low-power consumption - Mixing ratios - On-line mixing - Performance tests - Pesticide mixer - Single chip microcomputers Classification code:802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 901.3 Engineering Research DOI:10.6041/j.issn.1000-1298.2013.08.016 Database:Compendex 22. Accession number:20133316623797 Title:Effect of biogas slurry on yield increase, quality improvement, water and soil environment Authors:Wu, Shubiao1 ; Cui, Chang1 ; Zhang, Xiaoqian1 ; Li, Wei1 ; Pang, Changle1 ; Dong, Renjie1 Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China Corresponding author:Dong, R. (rjdong@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:118-125 179 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:This paper comprehensively summarized the research results from domestic and foreign studies of the effect of biogas slurry farmland application on plants yield and quality, and the effect on water and soil environment. It showed that biogas slurry played a positive role in improving the quality and yield of crops, improving plant seed germination, prevention and treatment of plant diseases and insect pests, and improving soil quality. However, an excess amount of biogas slurry application could lead to the pollution risks of water and soil environment. It should fully consider the land carrying capacity for biogas slurry and choose appropriate dosage which had no pollution on soil and groundwater, so that the demand of fertilizer could be saved and the production cost of farmers could be reduced. It could provide scientific guidance for biogas project handling biogas slurry. Number of references:59 Main heading:Soil pollution Controlled terms:Biogas - Groundwater - Groundwater pollution - Image quality - Seed - Soils Uncontrolled terms:Biogas projects - Biogas slurry - Environment - Plant diseases and insect pests - Quality improvement - Research results - Soil environment - Yield Classification code:444.2 Groundwater - 483.1 Soils and Soil Mechanics - 522 Gas Fuels - 741 Light, Optics and Optical Devices - 821.4 Agricultural Products DOI:10.6041/j.issn.1000-1298.2013.08.021 Database:Compendex 23. Accession number:20133316623818 Title:Prediction of pig weight based on radical basis function neural network Authors:Liu, Tonghai1, 2 ; Li, Zhuo1 ; Teng, Guanghui1 ; Luo, Cheng1 Author affiliation:1 College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China 2 Department of Computer Science and Information Engineering, Tianjin Agricultural University, Tianjin 300384, China Corresponding author:Teng, G. (futong@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:245-249 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:There is a certain correlation among the growth parameters of pigs, and some parameters have non-linear relationship with pig weights. When using the simple linear regression model to predict the pig weight, the collinearity among independent variables and low fit goodness were found. For these problems, based on the nearest neighbor clustering algorithm for RBF neural network, a pig weight prediction RBF neural network model was constructed with the growth parameters of 52 Landrace sows. The predicted value and measured value of the pig weight were compared by linear regression test. The regression analysis showed that the goodness of fit (R2) of RBF neural network prediction model for Landrace pig weight was 0.998, while R2 of the linear regression model was only 0.891. The results indicated that the RBF neural network-based modeling method was an effective way to build the prediction model of pig weight. It eliminated the collinearity of the independent variables in linear regression analysis, and forecasted better than linear regression model. Number of references:17 Main heading:Mammals Controlled terms:Clustering algorithms - Forecasting - Functions - Linear regression - Mathematical models - Neural networks - Radial basis function networks - Regression analysis - Statistics Uncontrolled terms:Linear regression models - Nearest neighbor-clustering algorithm - Network-based modeling - Non-linear relationships - Pig weight - Radical basis function neural networks - Radical basis functions - Simple linear regression Classification code:721 Computer Circuits and Logic Elements - 723.4 Artificial Intelligence - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics - 922.2 Mathematical Statistics DOI:10.6041/j.issn.1000-1298.2013.08.042 Database:Compendex 24. Accession number:20133316623808 Title:Effects of various 1-methylcyclopropene treatment durations on storage quality of apple fruit Authors:Li, Jiangkuo1 ; Lin, Yang2 ; Zhang, Peng3 ; Li, Boqiang1 ; Tian, Shiping1 Author affiliation:1 Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China 2 College of Food Science, Shenyang Agricultural University, Shenyang 110866, China 3 Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin 300384, China Corresponding author:Tian, S. (tsp@ibcas.ac.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:190-194 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Effects of various 1-methylcyclopropene (1-MCP) treatment durationon fruit quality, respiration intensity, ethylene release rate, cell membrane permeability, MDA content and fruit texture (including pericarp break force, pericarp break distance, pericarp toughness, pericarp brittleness and mean flesh firmness) of Fuji apple were studied. The results showed that 1-MCP treatment significantly reduced respiration intensity and ethylene release rate, and maintained storage quality of fruit, but the beneficial effect of 1-MCP treatment decreased with prolonged treatment period. The storage effect of 1-MCP treatment on 0, 7 and 14 days after harvest were obviously better than 21 days. Thus, 1-MCP treatment should be applied within two weeks to maintain the good storage quality of apple fruit. Number of references:17 Main heading:Fruits Controlled terms:Cell membranes - Cytology - Ethylene - Fracture mechanics - Plants (botany) - Textures Uncontrolled terms:1-methylcyclopropene - 1-methylcyclopropene (1-MCP) - Apple - Beneficial effects - Cell membrane permeability - Storage quality - Treatment duration - Treatment time Classification code:421 Strength of Building Materials; Mechanical Properties - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 804.1 Organic Compounds - 821.4 Agricultural Products - 933 Solid State Physics DOI:10.6041/j.issn.1000-1298.2013.08.032 Database:Compendex 25. Accession number:20133316623798 Title:Cutting performance of corn root-soil composite Authors:Zhao, Xu1 ; Zhang, Zuli2 ; Huang, Qiubo1 ; Zhang, Guoliang3 Author affiliation:1 School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China 2 College of Engineering, Shenyang Agricultural University, Shenyang 110866, China 3 College of Forestry, Agricultural University of Hebei, Baoding 071000, China Corresponding author:Zhang, Z. (sauzhangzl@yahoo.com.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:126-132 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Taking natural root-soil composite of corn Shennong 46 as test material, cutting mechanical tests were carried out in the universal test machine and homemade pressure system around specimen. The results showed that moisture content was the key natural factor influencing ultimate shear stress, which increased with moisture content. The ultimate shear stress in vertical profile 20 mm away from root center was the largest, and the secondary was in vertical profile through root center. For vertical profiles more than 20 mm away from root center, the longer distance, the smaller ultimate shear stress. Combining with ridge-till specifications, reasonable cutting section for stubble-cutting disc was 40 cm away from ridge center. In the vertical section, the greatest shear stress existed at a depth of 20-60 mm from the surface of earth, was about 5.20-7.15 MPa. The maximum power was consumed in this depth range for rootstalk cutting mechanism. Number of references:22 Main heading:Soils Controlled terms:Cutting tools - Moisture determination Uncontrolled terms:Corn - Cutting mechanisms - Cutting performance - Natural factors - Pressure system - Universal test - Vertical profile - Vertical section Classification code:483.1 Soils and Soil Mechanics - 605 Small Tools and Hardware - 944.2 Moisture Measurements DOI:10.6041/j.issn.1000-1298.2013.08.022 Database:Compendex 26. Accession number:20133316623824 Title:Inertial piezoelectric vibratory feeder Authors:Su, Jiang1, 2 ; Yang, Zhigang3 ; Tian, Fengjun3 ; Shen, Yanhu1 Author affiliation:1 Institute of Mechanical Science and Engineering, Jilin University, Changchun 130025, China 2 Department of Mechanical and Electrical Engineering, Zhuhai College of Jilin University, Zhuhai 519041, China 3 Institute of Chain Transmission, Jilin University, Changchun 130025, China Corresponding author:Yang, Z. (yzg@jlu.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:281-286 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:To meet the requirement of smooth convey for light, thin and small product in modern industrial, an inertial piezoelectric vibratory feeder was designed. Its working principle was analyzed and the dynamic model of bimorph vibrator was established. The effect of vibrator length, vibrator mass and impact force on deformation was analyzed in Matlab software. The force of parts in the hopper was analyzed. The prototype of inertial piezoelectric vibration feeder was developed and tested. The relationship among voltage, amplitude, frequency and feeding speed were obtained. The experimental results showed that the proposed vibratory feeder had good performance at resonance. The amplitude and feeding speed increased linearly with the increase of voltage. The proposed vibratory feeder had better driving ability and smaller space compared with the cantilever bimorph piezoelectric vibratory feeder, and had wide prospects. Number of references:16 Main heading:Feeding Controlled terms:MATLAB - Piezoelectricity - Vibrators Uncontrolled terms:Bimorph vibrator - Driving abilities - Feeding speed - Inertia - Matlab- software - Piezoelectric vibration - Vibratory feeders - Working principles Classification code:691.1 Materials Handling Equipment - 691.2 Materials Handling Methods - 701.1 Electricity: Basic Concepts and Phenomena - 921 Mathematics DOI:10.6041/j.issn.1000-1298.2013.08.048 Database:Compendex 27. Accession number:20133316623809 Title:Numerical simulation on gas-solid two-phase flow reaction of vortex reactor Authors:Sun, Yun1 ; Lin, Yaling1 ; Liu, Xingjing1 ; Liu, Fengjun1 ; Zhang, Qingquan1 ; Jin, Bu2 Author affiliation:1 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China 2 Tianjin Entry-Exit Inspection and Quarantine Bureau, Tianjin 300450, China Corresponding author:Sun, Y. (dsyun@caams.org.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:195-201 212 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Numerical simulation on the inner flow, heat transfer, mass transfer and cracking reaction in vortex reactors was carried out with gas-solid two-phase flow-reaction model. The detailed information of flow field, temperature field and concentration field of vortex reactor was obtained. Results showed that the motion of particles was cork screw path. The temperature in vortex reactors had certain rule and temperature gradient in axial and radial direction. The distributions of velocity had relations with different angles of rotor blade and no relations with hot oil temperature. The entrance velocity of vortex reactors was bigger and later flattens. Number of references:18 Main heading:Vortex flow Controlled terms:Computer simulation - Numerical models - Temperature - Temperature distribution - Two phase flow Uncontrolled terms:Concentration fields - Cracking reactions - Entrance velocity - Flow reactions - Gas solid two phase flow - Gas-solid two-phase - Motion of particles - Radial direction Classification code:631.1 Fluid Flow, General - 641.1 Thermodynamics - 723.5 Computer Applications - 921 Mathematics DOI:10.6041/j.issn.1000-1298.2013.08.033 Database:Compendex 28. Accession number:20133316623816 Title:Target recognition for grape bagging robot Authors:Yang, Qinghua1 ; Liu, Can1 ; Xun, Yi1 ; Bao, Guanjun1 ; Wang, Zhiheng1 ; Huang, Pengcheng1 Author affiliation:1 Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China Corresponding author:Yang, Q. (zjutme@163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:234-239 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Aimed at the image of the simple grapevine taken in the pergola trellis, a grape recognition algorithm combined with color and texture feature of color image was suggested in order to get the center line and the length of the grape. Firstly, Sobel operation was used to get the edge of the |G-R| |G-B| chromatic aberration image. Then, berries of the grape were detected by Hough transform according to the mathematical model of the outline of the grape berries. The circles detected by the Hough transform were judged by the feature of the color and texture of grape berries and the concentrated berries. At last, the shape parameters of the grape bunch were determined by the information of the berries after judged, which was needed by bagging automation of grape. The experimental results showed that the method of grape recognition was effective in segmenting the comparison of grapes. There were totally 78 images used in test, and 70 of them were correctly recognized. The correct recognition of grapes reached to 90%. Number of references:10 Main heading:Feature extraction Controlled terms:Aberrations - Computer vision - Fruits - Hough transforms - Mathematical models - Textures Uncontrolled terms:Chromatic aberration - Color and texture features - Color and textures - Grape - Recognition - Recognition algorithm - Shape parameters - Target recognition Classification code:933 Solid State Physics - 921.3 Mathematical Transformations - 921 Mathematics - 821.4 Agricultural Products - 741.2 Vision - 741 Light, Optics and Optical Devices - 716 Telecommunication; Radar, Radio and Television DOI:10.6041/j.issn.1000-1298.2013.08.040 Database:Compendex 29. Accession number:20133316623807 Title:Effect of treatment with 1-MCP or its structural analogues on ethylene synthesis of apple during cold storage Authors:Cheng, Shunchang1 ; Wei, Baodong1 ; Ren, Xiaolin2 ; Leng, Junying1 ; Feng, Xuqiao1 Author affiliation:1 College of Food Science, Shenyang Agricultural University, Shenyang 110866, China 2 College of Horticulture, Northwest A and F University, Yangling, Shaanxi 712100, China Corresponding author:Feng, X. (feng_xq@hotmail.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:185-189 212 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Effect of treatment with 1-MCP or its structural analogues on ethylene synthesis and senescence of 'Hanfu' apple during cold storage was investigated. After being fumigated for 20 h with 0.75 μL/L 1-MCP (1-methylcylopropene), 2 μL/L 1-PentCP (1-pentylcyclopropene) or 0.5 μL/L 1-OCP (1-octylcyclopropene) respectively, the apple fruits were packed with 0.02 mm thick plastic bags and then stored at (0±0.5)°C. The results showed that treatment with 1-MCP or its structural analogues reduced ethylene production and respiration rate, delayed the respiration and ethylene peak by 30 d compared with control fruits. The content of ACC (1-aminocyclopropane-1-carboxylic acid) in treated fruits exhibited higher level than untreated control fruits throughout the whole cold storage, because treatment with 1-MCP or its structural analogues promoted the activity of ACS (ACC synthetase). All the treatments inhibited the activity of ACO (ACC oxidase), therefore, ethylene production of the treated fruits was suppressed during the cold storage. In addition, 1-MCP and its structural analogue also deferred the increase in MDA content and membrane permeability, decreased respiration rate and ethylene production, and delayed senescence of 'Hanfu' apple. However, there existed no significant differences between treatments with 1-MCP or its structural analogues. Number of references:26 Main heading:Fruits Controlled terms:Cold storage - Ethylene - Plants (botany) - Plastic containers Uncontrolled terms:1-amino-cyclopropane- 1-carboxylic acids - 1-methylcylopropene - Apple - Ethylene production - Ethylene synthesis - Membrane permeability - Significant differences - Structural analogue Classification code:461.9 Biology - 691 Bulk Handling and Unit Loads - 694 Packaging - 694.4 Storage - 804.1 Organic Compounds - 821.4 Agricultural Products DOI:10.6041/j.issn.1000-1298.2013.08.031 Database:Compendex 30. Accession number:20133316623789 Title:Structural optimization and experimental verification of geared five-bar linkage seedling pick-up device Authors:Cui, Wei1, 2 ; Fang, Xianfa2 ; Zhao, Liang2 ; Song, Jiannong1 ; Lin, Jintian2 ; Dong, Xiangqian1 Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China 2 State Key Laboratory of Soil-Plant-Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China Corresponding author:Song, J. (songjn@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:74-77 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:In order to achieve the automatically seedling pick-up of duck-billed transplanter, a geared five-bar linkage seedling pick-up device was introduced. The ideal pick-up trajectory was obtained by simulation and optimization of structural parameters. The dynamic characteristics of the proposed device were also optimized. On the basis of theoretical studies, a seedling pick-up bench was designed. Experiment results showed that geared five-bar linkage seedling pick-up device was feasible and rational. Number of references:11 Main heading:Pickups Controlled terms:Experiments - Optimization - Structural optimization Uncontrolled terms:Dynamic characteristics - Experimental verification - Five-bar linkages - Simulation and optimization - Structural parameter - Theoretical study - Transplanter Classification code:752.3.1 Sound Reproduction Equipment - 901.3 Engineering Research - 921.5 Optimization Techniques DOI:10.6041/j.issn.1000-1298.2013.08.013 Database:Compendex 31. Accession number:20133316623821 Title:Position analysis of spherical mechanism with four-bar closed-loop chains Authors:Yang, Suixian1 ; Liu, Yanfang2 ; Sun, Yan1 Author affiliation:1 School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China 2 Dongfang Electric Co., Ltd., Chengdu 610036, China Corresponding author:Yang, S. (yangsx@163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:262-267 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A method of position analysis for spherical mechanisms with four-bar closed-loop chains was proposed. The mechanism was divided into a four-bar closed-loop mechanism and a single-opened-chain (SOC) unit. The constraint equation of the four-bar closed-loop was established with spherical loop equation. The constraint equation of SOC was set up with coordinate transformation and direction cosine matrix. The coupled constraint equation of whole mechanism was built up based on spherical trigonometry. The proposed method was simple to set up constraint, easy for elimination and less extraneous root, which was helpful to obtain symbolic solutions or figure-symbolic solutions. Number of references:15 Main heading:Spheres Controlled terms:Geometry - Linear transformations Uncontrolled terms:Closed-loop - Loop equations - Position analysis - Single-opened-chain - Spherical trigonometry Classification code:631 Fluid Flow - 921 Mathematics - 921.3 Mathematical Transformations DOI:10.6041/j.issn.1000-1298.2013.08.045 Database:Compendex 32. Accession number:20133316623805 Title:Determination of water content in de-enzyming green tea leaves based on visible-near infrared spectroscopy Authors:Hu, Yongguang1 ; Chen, Peipei1 ; Zhao, Menglong1 Author affiliation:1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China Corresponding author:Hu, Y. (deerhu@163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:174-179 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:To determine the moisture content in de-enzyming green tea leaves rapidly and nondestructively, prediction models were established based on visible-near infrared spectroscopy. Diffuse reflection spectra of 192 samples were collected with a portable field spectrometer (FieldSpec 3, ASD), among which 144 samples were partitioned to a calibration set and 48 samples to a prediction set using the sample set partitioning method based on joint X-Y distance. 11 sensitive bands were selected with correlation coefficient method, and then moisture content models of partial least squares and principal component regression, artificial neural network and their combination were established with the preprocessing methods of the first derivative and moving average filter. The model comparison showed that the prediction model of partial least squares regression was the best when 5 principal components were adopted. The calibration and prediction correlation coefficients were 0.990 and 0.819 respectively, and the root mean square errors of calibration and prediction were 0.011 and 0.037 respectively, and the mean error of predicted moisture content was 3.30%. Number of references:29 Main heading:Near infrared spectroscopy Controlled terms:Calibration - Forecasting - Least squares approximations - Mathematical models - Mean square error - Moisture - Moisture determination - Neural networks - Principal component analysis Uncontrolled terms:Correlation coefficient method - Diffuse reflection spectra - Green tea - Nondestructive detection - Partial least squares regression - Portable field spectrometers - Principal component regression - Visible-near infrared spectroscopy Classification code:944.2 Moisture Measurements - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.2 Mathematical Statistics - 921.6 Numerical Methods - 921 Mathematics - 801.4 Physical Chemistry - 801 Chemistry - 723.4 Artificial Intelligence DOI:10.6041/j.issn.1000-1298.2013.08.029 Database:Compendex 33. Accession number:20133316623779 Title:Position sensor fault-tolerant system low-speed performance of permanent magnet synchronous motor in vehicle application Authors:Wu, Zhihong1 ; Wang, Shuangquan1 ; Zhu, Yuan2 Author affiliation:1 School of Automotive Studies, Tongji University, Shanghai 201804, China 2 Chinese-German School for Postgraduate Studies, Tongji University, Shanghai 200092, China Corresponding author:Wu, Z. (zhihong.wu@tongji.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:13-20 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Based on fluctuating high frequency voltage signal injection sensorless control method, position sensor fault-tolerant control system for permanent magnet synchronous motor (PMSM) was designed. The phase delay, which existed between high frequency current signal and demodulated signal, was analyzed. The phase delay was caused by the inverter, the stator resistance and AD sampling time. The effect of the mutual inductance and the harmonic inductance on position estimation error were analyzed. And a compensation method was proposed. Simulation and experiment results showed that the position sensor fault-tolerant control system had the advantage of high tracking accuracy and certain disturbance-rejecting ability. It had also a good speed and position estimation performance at zero and low speed. Number of references:17 Main heading:Permanent magnets Controlled terms:Control systems - Inductance - Sensors - Synchronous motors Uncontrolled terms:Estimation errors - Mutual inductance - Permanent Magnet Synchronous Motor - Phase delay - Sensorless Classification code:701.1 Electricity: Basic Concepts and Phenomena - 704.1 Electric Components - 705.3.1 AC Motors - 731.1 Control Systems - 801 Chemistry DOI:10.6041/j.issn.1000-1298.2013.08.003 Database:Compendex 34. Accession number:20133316623822 Title:Nonlinear amplifier expanded dynamic range of active magnetic levitation system Authors:Zhang, Yanhong1, 2 ; Zhao, Dean1 ; Zhang, Jiansheng2 Author affiliation:1 School of Electronic and Information Engineering, Jiangsu University, Zhenjiang 212013, China 2 School of Electronic Information and Electric Engineering, Changzhou Institute of Technology, Changzhou 213002, China Corresponding author:Zhao, D. (dazhao@ujs.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:268-272 286 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:In order to overcome the nonlinear influence of electromagnet material on control system, a new method of nonlinear power amplifier was put forward. By this special amplifier, the differential electromagnet load system became a linear system. For the controller of active suspension, the control object was transformed into a linear control system, which facilitated the real-time calculation of the controls variable. The experiment result showed that the nonlinear amplifier had expanded the dynamic range of the controller and improved the stability of the active magnetic levitation control system. Number of references:15 Main heading:Magnetic levitation Controlled terms:Controllers - Electromagnets - Linear control systems - Magnetic levitation vehicles - Power amplifiers Uncontrolled terms:Active suspension - Control objects - Expanded dynamic range - Magnetic levitation systems - Non linear control - Nonlinear amplifier - Nonlinear power amplifiers - Real-time calculations Classification code:682 Railroad Rolling Stock - 704.1 Electric Components - 708.4 Magnetic Materials - 713.1 Amplifiers - 732.1 Control Equipment - 961 Systems Science DOI:10.6041/j.issn.1000-1298.2013.08.046 Database:Compendex 35. Accession number:20133316623781 Title:Identification for inductance parameters of IPMSM in vehicle Authors:Wu, Sibei1 ; Wu, Zhihong1 ; Zhu, Yuan2 Author affiliation:1 School of Automotive Studies, Tongji University, Shanghai 201804, China 2 Chinese-German School for Postgraduate Studies, Tongji University, Shanghai 200092, China Corresponding author:Zhu, Y. (yuan.zhu@tongji.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:27-32 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A method of high frequency current processing was proposed for inductance parameters identification. The d-axis and q-axis inductance parameters were identified. The effect of inverter's nonlinear factors on identification accuracy of inductance parameters was analyzed and deduced. The base current and other high frequency clutter current were excluding by applying two delay filters and two synchronous axis filters on response current. The positive and negative phase's amplitude were obtained. The d-axis and q-axis inductance were identified. The proposed method could identify inductance in the stationary state and operating state of the motor. The results showed that under the different loads and speeds of motor, the accuracy of inductance identification was high. It could give a help for improving the real driving control system. Number of references:15 Main heading:Identification (control systems) Controlled terms:Electric vehicles - Inductance - Parameter estimation - Saturation magnetization Uncontrolled terms:High-frequency current - Identification accuracy - Nonlinear factors - Operating state - Parameters identification - Q-axis inductance - Response current s - Stationary state Classification code:432 Highway Transportation - 701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 731.1 Control Systems DOI:10.6041/j.issn.1000-1298.2013.08.005 Database:Compendex 36. Accession number:20133316623796 Title:Nitrate removal from groundwater using permeable reactive barrier amended with sawdust and zero-valent iron Authors:Wang, Zhen1 ; Zhang, Zengqiang1 ; Li, Ronghua1 ; Xiao, Ran1 Author affiliation:1 College of Resources and Environment, Northwest A and F University, Yangling, Shaanxi 712100, China Corresponding author:Zhang, Z. (zhangzq58@126.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:112-117 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:To investigate the effects of different packing modes, inoculation quantites and hydraulic retention time on nitrate removal, permeable reactive barriers (PRBs) packed with sawdust, zero-valent iron (Fe0) and active carbon were tested in laboratory. The PRB filled with completely mixed sawdust and Fe0 showed higher nitrate removal efficiencies than those filled with sawdust and Fe0 in layer modes. Nitrate removal efficiencies and dissolved organic carbon (DOC) in effluent increased with hydraulic retention time increased. Within limits, increasing the amount of inoculum quantity of PRB could increase nitrate removal rate. Nitrate removal efficiency, DOC concentration and the number of bacterial colonies in effluent decreased with the initial nitrate concentration increasing, whereas the accumulation of ammonium showed an opposite trend. Addition of active carbon not only could promote the reduction of nitrate, decrease ammonium concentration but also could improve outlet water chroma. Furthermore, the nitrite could be nearly detected in the effluent, while the number of bacrteria colonies changed from 103 CFU/mL to 106 CFU/mL. Number of references:33 Main heading:Nitrogen removal Controlled terms:Effluents - Groundwater - Iron - Nitrates - Sawdust Uncontrolled terms:Ammonium concentrations - Bacterial colonies - Dissolved organic carbon - DOC concentrations - Hydraulic retention time - Nitrate concentration - Permeable reactive barriers - Zero-valent iron Classification code:444.2 Groundwater - 452.3 Industrial Wastes - 545.1 Iron - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 811.2 Wood and Wood Products DOI:10.6041/j.issn.1000-1298.2013.08.020 Database:Compendex 37. Accession number:20133316623788 Title:Reverse design and experiment of walking-type rice transplanter with equal-diameter cam seedling-pushing mechanism Authors:Chen, Jianneng1 ; Zhou, Lisha1 ; Wang, Ying1 ; Xu, Gaohuan1 ; Zhao, Yun1 ; Zhang, Chuanwei1 Author affiliation:1 School of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China Corresponding author:Chen, J. (jiannengchen@zstu.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:69-73 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The equal-diameter cam seedling-pushing mechanism was proposed in order to solve the problem that the structure size of conjugate cam seedling-pushing mechanism was too big. In the proposed seedling-pushing mechanism, equal-diameter cam was used to control the motion of seedling-pushing rod. Ideal kinematic curves of seedling-pushing rod were constructed and reverse model of the proposed seedling-pushing mechanism was established according to requirements of planting agriculture as well as driving mechanism with planetary elliptic-gear trains. Then a reverse design and simulation software was compiled based on VB 6.0. A set of optimum parameters including structural parameters as well as pitch curve of equal-diameter cam were obtained through the software, which could meet the requirements of planting agriculture. The seedling-pushing mechanism was developed based on these parameters and testified by high-speed video. Analysis and results of the experiments showed that the proposed seedling-pushing mechanism could meet the requirements of planting agriculture and had a smaller outer dimension compared to conjugate cam seedling-pushing mechanism. Number of references:13 Main heading:Cams Controlled terms:Agriculture - Experiments - Kinematics Uncontrolled terms:Driving mechanism - High-speed video - Kinematic curves - Optimum parameters - Reverse - Rice transplanter - Structural parameter - Structure sizes Classification code:601.3 Mechanisms - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901.3 Engineering Research - 931.1 Mechanics DOI:10.6041/j.issn.1000-1298.2013.08.012 Database:Compendex 38. Accession number:20133316623823 Title:Working properties of counterbalance valve based on AMESim code Authors:Yuan, Shihao1 ; Yin, Chenbo1 ; Liu, Shihao2 Author affiliation:1 Institute of Automobile and Construction Machinery, Nanjing University of Technology, Nanjing 210009, China 2 College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, China Corresponding author:Yin, C. (Chbyin@163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:273-280 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Static property of a type of speed compensation valve was analyzed. It was found that the load capacity was in proportion to main valve spool spring stiffness K, throttling flow rate q, inverse of throttling coefficient Cq-1, inverse of hydraulic perimeter of throttling port w-1, square root of oil density ρ0.5, throttling differential pressure Δp, ratio of rod diameter and piston diameter of load hydraulic cylinder R. The model used to study the dynamic property of the speed compensation valve was built by AMESim dynamic simulation code. By the results with the dynamic simulations of the model, it was observed that increasing control pressure pc could improve the steady speed magnitude of load, but had no effect on the transition time to reach steady speed. Decreasing spring stiffness K of main spool could improve the speed of load and increase the transition time. Increasing the mass of load would lengthen the transition time correspondingly, but had no effect on the final steady speed magnitude. The variation of taper spool diameter D almost had no influence on load dynamic property. Decreasing the ratio of rod diameter and piston diameter R would increase the final steady speed magnitude of load, but had no influence on the transition time of load speed. Number of references:15 Main heading:Speed Controlled terms:Computer simulation - Reels - Stiffness Uncontrolled terms:AMESim - Differential pressures - Dynamic performance - Dynamic simulation codes - Hydraulic cylinders - Load capacity - Simulation - Working properties Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 723.5 Computer Applications - 742.2 Photographic Equipment - 931.1 Mechanics - 951 Materials Science DOI:10.6041/j.issn.1000-1298.2013.08.047 Database:Compendex 39. Accession number:20133316623784 Title:Simulation and experiment on electrical parking brake system Authors:Wang, Bin1 ; Guo, Xuexun1 ; Zhang, Chengcai1 ; Xiong, Zhe1 ; Zhang, Jie2 Author affiliation:1 Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan University of Technology, Wuhan 430070, China 2 Technology Center, Wanxiang Group, Hangzhou 311200, China Corresponding author:Guo, X. (guoxx@whut.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:45-49 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The simulation models of electrical parking brake (EPB) actuator in Simulink software were built, including DC motor model, lead-screw model and inner friction analysis models. The inner friction concluded viscous friction, Coulomb-friction and etc. In order to save cost, a method for controlling EPB system by using on-off controller was proposed. The simulation results and experiment results were compared to verify the feasibility of the proposed simulation model and on-off controller used in EPB system. Number of references:19 Main heading:Friction Controlled terms:Brakes - Computer simulation - Control - Controllers - DC motors - Experiments - Models - Tribology Uncontrolled terms:Electrical parking brakes - Friction analysis - Motor models - Simulation - Simulation model - Simulink software - Viscous friction Classification code:931 Classical Physics; Quantum Theory; Relativity - 902.1 Engineering Graphics - 901.3 Engineering Research - 732.1 Control Equipment - 931.1 Mechanics - 732 Control Devices - 723.5 Computer Applications - 705.3.2 DC Motors - 602 Mechanical Drives and Transmissions - 731 Automatic Control Principles and Applications DOI:10.6041/j.issn.1000-1298.2013.08.008 Database:Compendex 40. Accession number:20133316623814 Title:Laser measurement and experiment of hilly fruit tree canopy volume Authors:Yu, Long1 ; Huang, Jian1 ; Zhao, Zuoxi1 ; Zhang, Lin1 ; Sun, Daozong1 Author affiliation:1 Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China Corresponding author:Zhao, Z. (zhao_zuoxi@hotmail.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:224-228 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:Fruit tree canopy volume is an important factor for precision management in fruit orchards such as pesticide variable spraying, precision fertilizing and yield estimation. In order to overcome the problems of uneven hilly environment and irregular planting on fruit tree canopy volume, a platform for measuring fruit tree canopy volume by laser was set up. Based on AHRS and DGPS sensors, 3-D data of laser scanned point of fruit tree canopy in geodetic coordinate system was deduced through spatial coordinates transforming. The area and line information of point cloud of fruit tree canopy were extracted by using slicing technology, and the canopy volume was calculated with an accumulation method. The test showed that the shape of fruit tree canopy could be represented by the canopy point cloud of litchi fruit tree in the geodetic coordinate system. Taking three artificial pruning cylindrical hedgerow trees as experimental object, the relative measuring errors between artificial measurement and laser measurement was about 5%. Number of references:25 Main heading:Orchards Controlled terms:Forestry - Geodesy - Measurement errors - Metadata - Sensors - Volume measurement Uncontrolled terms:AHRS - Fruit trees - Geodetic coordinate system - Hilly - Laser measurements - Laser sensor - Spatial coordinates - Variable spraying Classification code:943.2 Mechanical Variables Measurements - 922 Statistical Methods - 821.3 Agricultural Methods - 821.0 Woodlands and Forestry - 801 Chemistry - 723 Computer Software, Data Handling and Applications - 405.3 Surveying DOI:10.6041/j.issn.1000-1298.2013.08.038 Database:Compendex 41. Accession number:20133316623804 Title:Detection of shelf life of Malus asiatica using near-infrared spectroscopy and softening index Authors:Xue, Jianxin1 ; Zhang, Shujuan1 ; Sun, Haixia1 ; Zhou, Jingbo1 Author affiliation:1 College of Engineering, Shanxi Agricultural University, Taigu 030801, China Corresponding author:Zhang, S. (zsujuan@263.net) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:169-173 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The classified feasibility of Malus asiatica fruit by using near-infrared spectroscopy (VIS/NIR spectrometer) and softening index during different shelf life was analyzed. A mathematical model was established by combining partial least square (PLS) and standard normalized variate (SNV) which was regarded as the best pre-processing technology. The determination coefficients (R2) of calibration set and prediction set were 0.847 and 0.813 respectively, which illustrated that there was a high correlation between spectrum and the softening index. It showed that the softening index could be used to classify Malus asiatica samples during different shelf life. The LS-SVM and PLS-LDA were applied to build classification models, respectively. The results indicated that non-linear LS-SVM model was more suitable for classification of Malus asiatica samples than linear PLS-LDA model. The average correct recognition rate and average correct rejection rate were above 94%. Number of references:18 Main heading:Plastic flow Controlled terms:Infrared spectroscopy - Mathematical models Uncontrolled terms:Classification models - Determination coefficients - Malus asiatica - Partial least square (PLS) - Pre-processing technology - Shelf life - Softening index - Visible/near-infrared spectroscopies Classification code:421 Strength of Building Materials; Mechanical Properties - 741.1 Light/Optics - 921 Mathematics - 933 Solid State Physics DOI:10.6041/j.issn.1000-1298.2013.08.028 Database:Compendex 42. Accession number:20133316623826 Title:Error measurement method for rotation axes of five-axis machine tool based on machine vision Authors:Sun, Huijuan1 ; Jiang, Honghai2 ; Yin, Goufu1 Author affiliation:1 School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China 2 Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650093, China Corresponding author:Sun, H. (scdx2013@163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:293-298 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A measurement method was proposed for rotation axes of five-axis machine tool based on machine vision. Firstly, the vision technology was adopted to obtain sign images by using CCD camera. Then, the digital image processing techniques were used to analyze these images. At last, the positioning errors of rotary axes were identified by calculating the relative rotary errors at different positions of rotation axes of machine tool. Comparing to traditional method, the experimental results showed that the proposed method with a simply, high efficiency and application value provided a computation basis for the error compensation of a machine tool. Number of references:22 Main heading:Computer vision Controlled terms:Image processing - Machine tools - Measurement errors Uncontrolled terms:Digital image processing technique - Error measurements - Five-axis machine tools - Measurement methods - NC machine tools - Positioning error - Rotary axis - Vision technology Classification code:603.1 Machine Tools, General - 741 Light, Optics and Optical Devices - 741.2 Vision - 922 Statistical Methods DOI:10.6041/j.issn.1000-1298.2013.08.050 Database:Compendex 43. Accession number:20133316623817 Title:Decision support system of N, P and K ratio fertilization Authors:Yuan, Yanwei1 ; Li, Shujun1 ; Fang, Xianfa1 ; Wei, Liguo1 ; Liu, Yangchun1 Author affiliation:1 State Key Laboratory of Soil-Plant-Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China Corresponding author:Li, S. (lisj@caams.org.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:240-244 223 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:In order to solve the low utilization and unsuitable ratio of N, P and K in traditional fertilization, soil sample strategy and distribution maps of available nitrogen, phosphorus and potassium were studied. The variable rate fertilization decision support system was developed based on distribution maps. Combined with GPS information, the motor speed of independent fertilizer for N, P and K were controlled to make urea, diammonium phosphate and potassium sulfate be used as needed. The comparative experiment of traditional fertilization and ratio fertilization for corn and soybean in No. 5-2 plots of Heilongjiang Hongxing Farm was carried out. Results showed that, with ratio fertilization method, the yield of soybean and corn increased by 2.33% and 9.32% respectively in case of saving fertilizer of 15%. Number of references:18 Main heading:Artificial intelligence Controlled terms:Decision support systems - Experiments - Fertilizers - Maps - Potassium - Urea Uncontrolled terms:Available nitrogen - Comparative experiments - Diammonium phosphates - Distribution maps - Potassium sulfate - Precision Agriculture - Ratio fertilization - Variable rate fertilization Classification code:902.1 Engineering Graphics - 901.3 Engineering Research - 804.1 Organic Compounds - 804 Chemical Products Generally - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 549.1 Alkali Metals DOI:10.6041/j.issn.1000-1298.2013.08.041 Database:Compendex 44. Accession number:20133316623802 Title:Application of NIR and Raman spectroscopy for quality and safety inspection of fruits and vegetables: A review Authors:Fu, Xiaping1 ; Ying, Yibin1 Author affiliation:1 College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China Corresponding author:Ying, Y. (yingyb@zju.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:148-164 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:This review mainly focused on researches and applications of visible/near infrared (Vis/NIR) spectroscopy and Raman spectroscopy for quality and safety inspection of fruits and vegetables. Vis/NIR spectroscopy was widely and successfully applied in fruits and vegetables for quantitative quality analysis (including internal components like sugar content and acidity, and tissue properties like firmness, etc.), qualitative quality analysis (including defects detection, maturity classification, storage time/on-shelf life discrimination, etc.), growing or processing monitoring, growing condition analysis, safety inspection, variety and geographical origin tracing, and so on. Raman spectroscopy was used for internal components analysis (especially for carotenoids), quality classification, maturity discrimination and defects detection of fruits and vegetables. It is even a more potential way for detecting pesticide residues and microbiological contaminations in fruits and vegetables. At the end of this review, advantages and disadvantages of spectroscopy techniques for quality and safety inspection of fruits and vegetables were summarized, and also the future trends. Number of references:119 Main heading:Food safety Controlled terms:Defects - Fruits - Near infrared spectroscopy - Quality control - Raman spectroscopy - Safety engineering - Spectrum analysis - Vegetables Uncontrolled terms:Fruits and vegetables - Geographical origins - Microbiological contaminations - Nondestructive detection - Quality and safeties - Quality classification - Vis/NIR spectroscopy - Visible/near infrared Classification code:951 Materials Science - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 914 Safety Engineering - 913.3 Quality Assurance and Control - 821.4 Agricultural Products - 801 Chemistry - 741.1 Light/Optics - 461.6 Medicine and Pharmacology - 423 Non Mechanical Properties and Tests of Building Materials DOI:10.6041/j.issn.1000-1298.2013.08.026 Database:Compendex 45. Accession number:20133316623806 Title:Color and texture monitoring based on computer vision during banana storage Authors:Hu, Menghan1 ; Dong, Qingli1 ; Liu, Baolin1 ; Huang, Xunjuan1 Author affiliation:1 School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China Corresponding author:Dong, Q. (qdong@usst.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:180-184 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The variation of color and texture during banana storage was studied based on computer vision. The images of green banana in first mature stage were acquired everyday during storage. After the binary operation, RGB and gray images were masked by the binary images to eliminate the background. Then, R, G and B average values were extracted from pre-processed color images as color indexes. The gray-level co-occurrence matrix generating rule of the irregular image was used to obtain these matrixes of pre-processed gray images. Three texture descriptors were extracted as texture indexes from these matrixes, namely energy, contrast and homogeneity, respectively. Results showed that the change curve of R average values in combination with that of G could describe banana surface condition before the sixth mature stage, and the curve of contrast and homogeneity could do that after the sixth mature stage. Number of references:21 Main heading:Fruits Controlled terms:Color - Computer vision - Monitoring - Textures Uncontrolled terms:Average values - Banana - Binary operations - Change curves - Color and textures - Gray level co-occurrence matrix - Surface conditions - Texture descriptors Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 933 Solid State Physics - 741.2 Vision - 741.1 Light/Optics - 821.4 Agricultural Products DOI:10.6041/j.issn.1000-1298.2013.08.030 Database:Compendex 46. Accession number:20133316623782 Title:Power system of electric vehicle driven by in-wheel motors Authors:Meng, Qinghua1 ; Xu, Jin1 ; Wang, Dongfeng1 Author affiliation:1 School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China Corresponding author:Meng, Q. (mengqinghua@gmail.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:33-37 20 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A power system of electric vehicle driven by in-wheel motors was studied. First, force conditions of the running electric vehicle driven by in-wheel motors were analyzed. Then, the in-wheel motors and lead-acid batteries were selected with a certain type electric vehicle driven by in-wheel motors as a sample. A power system model of electric vehicle driven by in-wheel motors was built and simulated based on ADVISOR. The simulation result showed that the selected in-wheel motors and lead-acid batteries could meet the design requirement. Finally, the electric frame car designed was tested to prove the reasonableness of the simulation. Number of references:15 Main heading:All wheel drive vehicles Controlled terms:Computer simulation - Electric vehicles Uncontrolled terms:Force conditions - In-wheel motor - Power system - Power system model - Simulation analysis Classification code:432 Highway Transportation - 662 Automobiles and Smaller Vehicles - 663 Buses, Tractors and Trucks - 723.5 Computer Applications DOI:10.6041/j.issn.1000-1298.2013.08.006 Database:Compendex 47. Accession number:20133316623790 Title:Suction type offset double disc seed metering device of soybean seeder Authors:Zhao, Jiale1 ; Jia, Honglei2 ; Jiang, Xinming1 ; Wang, Yu1 ; Wang, Gang1 ; Guo, Hui1 Author affiliation:1 College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China 2 Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China Corresponding author:Jia, H. (jiahl@vip.163.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:78-83 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:A double offset disc air-suction seed metering device for soybean was designed. The key parts of seed metering device was designed and optimized based on the working principles of seed taking and seed metering. The single factor experiments and the quadratic general rotary unitized design were carried out with the rotational speed and air velocity as experimental factors and seed missing rate as experimental index. The regression surface was obtained and its mathematical model was built by using the Design-Expert software. The results showed that the air velocity of 220 m/s and rotational speed of 100 r/min were the best combination factors, which leaded to the seed missing rate of 2.72%. Number of references:15 Main heading:Air Controlled terms:Design - Mathematical models Uncontrolled terms:Experimental factors - Performance - Seed metering devices - Seeder - Single-factor experiments - Soybean - Suction type - Working principles Classification code:408 Structural Design - 804 Chemical Products Generally - 921 Mathematics DOI:10.6041/j.issn.1000-1298.2013.08.014 Database:Compendex 48. Accession number:20133316623791 Title:Axisymmetric cone-jet model and numerical simulation for electrostatic spraying Authors:Wang, Zhaohui1 ; Jiang, Shengwei2 ; Gao, Quanjie1 Author affiliation:1 School of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China 2 School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China Corresponding author:Wang, Z. (zhwang@wust.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:84-89 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:To study the cone-jet shape forming process and its impact factors by electrostatic spraying, combining with electrostatic spraying blade, the 2-D axisymmetric cone-jet physical model was proposed. Based on continuity equation and momentum equation in fluid dynamics, electric potential field equation and boundary conditions, the control equation of mathematical model was calculated by using Matlab and finite difference methods. The cone-jet shape, the electric field distribution for both internal and external of cone-jet and the electric field strength of the cone-jet surface were obtained. The calculated results showed the larger fluid flow and fluid surface tension, the larger the diameter and the top of cone-jet were. In the internal of cone-jet, the radial potential and electric field strength were gradually decreased, but the axial potential was increased slowly and the axial electric field strength kept invariant. In the external of cone-jet, the radial potential was stable and the axial potential uniformly changed. Fluid surface tension and fluid flow were inversely proportional to the normal electric field strength along the con-jet surface, but had no effect on the tangential electric field strength. Number of references:16 Main heading:Electric fields Controlled terms:Computer simulation - Flow of fluids - MATLAB - Numerical models - Surface tension Uncontrolled terms:Axisymmetric - Continuity equations - Control equations - Electric field distributions - Electric field strength - Electric potential fields - Electrostatic spraying - Tangential electric field Classification code:701.1 Electricity: Basic Concepts and Phenomena - 723.5 Computer Applications - 921 Mathematics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids DOI:10.6041/j.issn.1000-1298.2013.08.015 Database:Compendex 49. Accession number:20133316623793 Title:4LQZ-6 tangential-longitudinal axial combine harvester Authors:Xu, Lizhang1 ; Li, Yaoming1 ; Tang, Zhong1 ; Wang, Legang2 ; Jiao, Zhongyuan2 Author affiliation:1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China 2 Foton Lovol International Heavy Industries Co., Ltd., Weifang 261206, China Corresponding author:Xu, L. (justxlz@126.com) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:94-98 111 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:The harvesting flow chart and overall design of 4LQZ-6 tangential-longitudinal axial combine harvester was put forward and the design parameters of major working parts such as tangential axial threshing and separating unit, positive feeding unit, longitudinal axial threshing and separating unit and air-and-screen cleaning unit were discussed. The test in fields showed that when the wheat yield was 6605 kg/hm2, the total loss rate was 0.2%, breakage rate and rate of impurity were both 0.1%, productivity was 1.47 hm2/h. When the rice yield was 8021 kg/hm2, the total loss rate was 1.7%, breakage rate and rate of impurity were 0.9% and 0.8% respectively, productivity was 2.27 hm2/h. The technical indexes could meet the demands of design. Number of references:12 Main heading:Harvesters Controlled terms:Air cleaners - Combines - Design - Productivity Uncontrolled terms:Air-and-screen cleaning units - Breakage rates - Combine harvesters - Design parameters - Overall design - Tangential-longitudinal axial - Threshing and separating unit - Working parts Classification code:408 Structural Design - 651.2 Wind Tunnels - 821.1 Agricultural Machinery and Equipment - 913.1 Production Engineering DOI:10.6041/j.issn.1000-1298.2013.08.017 Database:Compendex 50. Accession number:20133316623811 Title:Solution physicochemical properties and rheological behavior of lecithin-soybean protein complex Authors:Li, Jufang1 ; Lü, Ying2 ; Xu, Jingting1 ; Zuo, Feng1 ; Guo, Shuntang1 Author affiliation:1 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China 2 Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China Corresponding author:Guo, S. (shuntang@cau.edu.cn) Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery Abbreviated source title:Nongye Jixie Xuebao Volume:44 Issue:8 Issue date:August 2013 Publication year:2013 Pages:207-212 Language:Chinese ISSN:10001298 CODEN:NUYCA3 Document type:Journal article (JA) Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China Abstract:In order to confirm the soybean protein solution properties and rheological behavior after combined with lecithin, the surface charge, particle size, fluid type and the solution viscosity of lecithin-soybean protein complex were investigated. The results showed that the enhanced negative charge of protein particle, greater particle size and improvement of soluble protein were occurred with the increasing of combined lecithin content. The rheological characterization data displayed that the corresponding protein concentration reduced gradually when the n value, which indicated the fluid type, began to less than 1 with the increasing of lecithin combined content. This change explained that the complex of lecithin on soybean protein could lower the inflection point of protein concentration which indicated the change of fluid type. And then the protein viscosity was reduced by the effect of moderate lecithin content. Number of references:20 Main heading:Lecithin Controlled terms:Particle size - Proteins - Rheology - Viscosity - Zeta potential Uncontrolled terms:Inflection points - Physicochemical property - Protein complexes - Protein concentrations - Rheological behaviors - Rheological characterization - Solution viscosity - Soybean proteins Classification code:631.1 Fluid Flow, General - 801.3 Colloid Chemistry - 804.1 Organic Compounds - 931.1 Mechanics - 943.2 Mechanical Variables Measurements DOI:10.6041/j.issn.1000-1298.2013.08.035 Database:Compendex
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