2013年第44卷第1期共收录49篇
1. Accession number:20130616000193
  Title:Effects of vacuum pulse infiltration of exogenous spermine on quality of postharvest common bean
  Authors:Tian, Weina1, 2 ; Miao, Ying1 ; Cao, Jiankang1 ; Jiang, Weibo1, 2  
  Author affiliation:1  College of Food Science and Engineering, China Agricultural University, Beijing 100083, China
                 2  National Engineering Research Center for Fruits and Vegetables Processing, China Agricultural University, Beijing 100083, China
  Corresponding author:Jiang, W. (jwb@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:131-136 166
  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:With the aim to investigate the influence of spermine (SPM) treatment by vacuum pulse infiltration on postharvest quality of common beans (Phaseolus vulgaris L.), common beans were immersed in SPM solutions (0, 0.02, 0.2, 0.5 or 1.0 mmol/L) under vacuum (-20 kPa) for 2 min and then stored at 20°C, 80%-85% relative humidity for 8 days. The results indicated that exogenous SPM treatments could significantly inhibit water loss and cutting-force increasing, and reduce the rust spots forming and decay of bean pod. Exogenous SPM treatments could also remarkably prevent decrease in levels of the soluble protein in the bean seed and the total soluble solids in the bean pod. The treatment with 0.5 mmol/L SPM was more effective than the other treatments. The decay or rust spots index of the bean pod treated with 0.5 mmol/L SPM was about 68% or 23% lower than that of control in the 8th day of storage, respectively. The results could be applicable to improve quality of common bean for commercial purpose.
  Number of references:25
  Main heading:Vacuum
  Uncontrolled terms:  Common beans  -  Cutting forces  -  Exogenous spermine  -  Phaseolus vulgaris  -  Postharvest  -  Postharvest quality  -  Soluble proteins  -  Storage quality  -  Total soluble solids  -  Vacuum pulse   -  Water loss
  Classification code:633 Vacuum Technology
  DOI:10.6041/j.issn.1000-1298.2013.01.025
  Database:Compendex
 
1. Accession number:20130616000215
  Title:Optimization design on cooling water channel of hot stamping mold of high strength steel
  Authors:Cai, Yujun1 ; Chen, Shulai2 ; Wang, Yuguang2 
  Author affiliation:1  School of Mechanical Engineering, Tianjin University, Tianjin 300192, China
                 2  Tianjin Key Lab. of High Speed Cutting and Precision Machining, Tianjin University of Technology and Education, Tianjin 300222, China
  Corresponding author:Cai, Y. (cyjal@126.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:253-257 252
  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 temperature distribution of parts and mould was simulated by ANSYS/LS-DYNA. The shortcomings of the uniform waterway were analyzed. APDL was applied over the thermal field simulation. Zero-order search and fist-order search was combined as the optimization algorithm. In this program, the radius of holes, the distances of adjacent holes and the distances of holes and the profile were chosen as optimization variables. The well-distributed temperature of parts and the needed critical cooling rate were chosen as the optimization objectives to create the objective function. Objective function value was 26.553 after the optimization which was 64.404 before the optimization. By comparing the temperature distribution of the optimized cooling water channel with original, it can be seen that the maximum temperature was decreased by 44.5% and the lowest temperature was decreased by 14.5%, to realize the optimization design of parameters of the cooling water channel. Finally the experiment had been designed to verify the correctness of the optimization result.
  Number of references:12
  Main heading:Optimization
  Controlled terms:  Algorithms  -  Cooling water  -  Design  -  High strength steel  -  Molds  -  Temperature distribution
  Uncontrolled terms:  Critical cooling rate  -  Hot-stamping  -  Maximum temperature  -  Objective function values  -  Objective functions  -  Optimization algorithms  -  Optimization design  -  Optimization variables  -  Thermal field
  Classification code:921 Mathematics  -  816.2 Plants and Machinery for Plastics and Other Polymers  -  723 Computer Software, Data Handling and Applications  -  921.5 Optimization Techniques  -  641.1 Thermodynamics  -  545.3 Steel  -  408 Structural Design  -  616 Heat Exchangers
  DOI:10.6041/j.issn.1000-1298.2013.01.047
  Database:Compendex

2. Accession number:20130616000190
  Title:Sensory evaluation of corn juices based on cloud model
  Authors:Liu, Jingjing1 ; Sun, Yonghai1 ; Chen, Li1 ; Sun, Zhonglei2 ; Li, Yazhuo1 
  Author affiliation:1  College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
                 2  Life Science and Technology Institute, Yangtze Normal University, Chongqing 408100, China
  Corresponding author:Sun, Y. (sunyh@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:113-118 112
  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 conversion between qualitative descriptive language and corresponding quantitative values was achieved in corn juices sensory evaluation process based on cloud model. Backward cloud model was used to transform and analyze the scores of sensory evaluation of corn juices. The qualitative concept of corn juices was obtained. Forward cloud normal model transformed the qualitative concept of corn juices to quantitative values, and restored to different test points retaining the data characteristics. The cloud model was extended to multidimensional space based on the assessment for corn juices. Integrated qualitative characterization described general character of corn juices in 4-D space.
  Number of references:13
  Uncontrolled terms:  Cloud models  -  Corn juices  -  Data characteristics  -  Multi-dimensional space  -  Normal cloud model  -  Normal model  -  Qualitative characterization  -  Quantitative values  -  Sensory evaluation  -  Test points
  DOI:10.6041/j.issn.1000-1298.2013.01.022
  Database:Compendex

3. Accession number:20130616000180
  Title:Establishment and experiment on nonlinear circulation mathematical model of axial flow pump impeller
  Authors:Zhang, Desheng1 ; Shi, Weidong1 ; Li, Tongtong1 ; Gao, Xiongfa1 ; Guan, Xingfan1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Zhang, D. (zds@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:58-61 66
  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 nonlinear circulation mathematical model of axial flow pump impeller was established based on the independence assumption of the cylindrical layer, the velocity gradient equation and meridional velocity equation in axial-flow impeller outlet. Miniature five-hole spherical probe was used to measure circulation and meridional velocity of South-to-North Water Diversion Project axial flow pump model (TJ04-ZL-06) in the blade outlet at the optimal condition. The experimental results show that the nonlinear circulation distribution appears in the axial flow impeller outlet. The circulation curve is relatively flat in the central of blade, while it reduces to about 0.8 times near hub and increases to about 1.2 times near tip. The meridional velocity distribution shows parabolic flow pattern and the maximum velocity appears in the middle of blade. The meridional velocity in blade outlet was calculated based on nonlinear circulation mathematical model. The results show that the calculated values show agreement with the experimental results, and the calculation errors of different radius points are less than 5%.
  Number of references:18
  Main heading:Nonlinear equations
  Controlled terms:  Axial flow  -  Flow measurement  -  Impellers  -  Mathematical models  -  Pumps  -  Velocity  -  Velocity distribution
  Uncontrolled terms:  Axial flow impellers  -  Axial flow pump  -  Calculated values  -  Calculation error  -  Impeller outlet  -  Independence assumption  -  Maximum velocity  -  Nonlinear circulations  -  Optimal conditions  -  South-to-North water diversion project   -  Spherical probes  -  Velocity equation  -  Velocity gradients
  Classification code:931.3 Atomic and Molecular Physics  -  931.1 Mechanics  -  921.1 Algebra  -  921 Mathematics  -  631.1 Fluid Flow, General  -  618.2 Pumps  -  601.2 Machine Components
  DOI:10.6041/j.issn.1000-1298.2013.01.012
  Database:Compendex

4. Accession number:20130616000177
  Title:Effects of diffuser on self-priming performance of flow-ejecting self-priming centrifugal pump
  Authors:Liu, Jianrui1 ; Wen, Haigang1 ; Xiang, Hongjie1 ; Guo, Chenxu1 ; Gao, Zhenjun1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Liu, J. (ljrwjj@126.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:43-47
  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 type of diffuser which had two asymmetrical exits and a separating flow board was placed at the inlet of the impeller of flow-ejecting self-priming centrifugal pump. The gap between the separating flow board and the impeller was 1.0 mm. Based on Mixture multiphase flow model, the standard k-Ε turbulence model and SIMPLE algorithm, unsteady numerical simulation of the self-priming process was carried out by using Fluent software. The distributions of pressure, velocity and gas-liquid phases field inside the pump, and also the changing regularity of pressure, gas phase volume flow rate and liquid mass flow rate on the two exits of the diffuser with the change of timestep were obtained. The results show that the pressure in the diffuser gradually increases along the direction of flow and appears larger change gradient, the pressure inside the each runner of the impeller approximate symmetric distribution.The flow parameters appear periodic change on the two asymmetrical exits of the diffuser. The gap between the separating flow board and impeller have not only prevented the formation of circulation of the fluid, reducing hydraulic loss and improving the efficiency of the pump, but also quicken the mixing of the gas-liquid near the gap, shortening the self-priming time of the pump.
  Number of references:11
  Main heading:Diffusers (fluid)
  Controlled terms:  Centrifugal pumps  -  Computer simulation  -  Diffusers (optical)  -  Impellers  -  Inlet flow  -  Liquids  -  Multiphase flow  -  Pumps  -  Turbulence models
  Uncontrolled terms:  Changing regularity  -  Flow parameters  -  FLUENT software  -  Gas liquids  -  Gas phase volume  -  Hydraulic loss  -  Liquid mass flow rate  -  Multi-phase flow models  -  Self-priming  -  Self-priming centrifugal pumps   -  Separating flow board  -  SIMPLE algorithm  -  Time step
  Classification code:601.2 Machine Components  -  618.2 Pumps  -  631.1 Fluid Flow, General  -  723.5 Computer Applications  -  741.3 Optical Devices and Systems  -  931.2 Physical Properties of Gases, Liquids and Solids
  DOI:10.6041/j.issn.1000-1298.2013.01.009
  Database:Compendex

5. Accession number:20130616000209
  Title:Design knowledge linear classification of complex product based on margin and probability information
  Authors:Tu, Li1, 2 ; Che, Junhua1, 3 
  Author affiliation:1  State Key Laboratory of CAD and CG, Zhejiang University, Hangzhou 310027, China
                 2  Department of Mechanical Engineering, Zhejiang Institute of Mechanical Engineering, Hangzhou 310053, China
                 3  Department of Mechanical Engineering, Jinan Vocational College, Ji'nan 250104, China
  Corresponding author:Tu, L. (tu_li22@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:217-221
  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 the complex product design knowledge with a large number catalogs and data volumes, the multi-classification problem was solved by using linear approach based on the margin and probability information of MPM. The true mean and covariance were replaced by the sample ones. The weight voting matrix was established, the coding matrix varied with the difference algorithm and training data. The classifier with max value was selected by using the amplitude value. Linear classifier was used as binary one for high speed. The angle difference measurement of subspace was proposed to characterize the difference of every class conception. The feasibility and practicality of the above mentioned method were approved by forklift product design knowledge.
  Number of references:12
  Main heading:Matrix algebra
  Controlled terms:  Probability  -  Product design
  Uncontrolled terms:  Angle difference  -  Complex products  -  Data volume  -  Design knowledge  -  Difference algorithms  -  Linear approach  -  Linear classification  -  Linear classifiers  -  Minimax probability machine  -  Multi-classification problems   -  Multi-classifier  -  Probability informations  -  Training data
  Classification code:913.1 Production Engineering  -  921.1 Algebra  -  922.1 Probability Theory
  DOI:10.6041/j.issn.1000-1298.2013.01.041
  Database:Compendex

6. Accession number:20130616000179
  Title:Numerical simulation of elimination of pressure fluctuation in francis turbine draft tube using water jet
  Authors:Li, Zhangchao1 ; Chang, Jinshi1 ; Xin, Zhe2 
  Author affiliation:1  College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
                 2  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Chang, J. (cjs@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:53-57
  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:3-D unsteady turbulent flow simulation with RNG k-Ε turbulence model of complete flow passage on Francis turbine at partial load condition was performed. The simulation results were compared with the test data. The simulation predicted the pressure fluctuation magnitude and frequency characteristic in the draft tube successfully. A method injecting water from the crown tip to the turbine draft tube to weaken the pressure fluctuation was introduced. Simulation of the flow with water jet was performed, showing that the water jet weakened the pressure fluctuation in the turbine draft tube effectively. With the increase of the jet flow rate, a greater reduction of pressure fluctuation magnitude was detected, but a decrease of efficiency was found. To keep a balance between pressure fluctuation mitigation and efficiency requirement, 0.03-0.05 times of flow rate at the calculated operating condition was suggested.
  Number of references:11
  Main heading:Tubes (components)
  Controlled terms:  Computer simulation  -  Flow rate  -  Francis turbines  -  Jets  -  Turbulence models
  Uncontrolled terms:  Draft tubes  -  Efficiency requirements  -  Flow passage  -  Frequency characteristic  -  Jet flow rate  -  Operating condition  -  Partial load  -  Pressure fluctuation  -  Test data  -  Vortex rope   -  Water jets
  Classification code:616.1 Heat Exchange Equipment and Components  -  617.1 Hydraulic Turbines  -  631 Fluid Flow  -  631.1 Fluid Flow, General  -  723.5 Computer Applications
  DOI:10.6041/j.issn.1000-1298.2013.01.011
  Database:Compendex

7. Accession number:20130616000178
  Title:3-D numerical simulation of inlet structure flow in pumping station based on eulerian solid-liquid two-phase flow model
  Authors:Zhou, Daqing1 ; Mi, Zihao1 ; Mao, Yuanting2 
  Author affiliation:1  Department of Energy and Electrical, Hohai University, Nanjing 211100, China
                 2  Hydroelectric Investigation and Design Institute, SPC, Chengdu 610072, China
  Corresponding author:Zhou, D. (zhoudaqing@hhu.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:48-52
  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:Sediment deposition in the pumping station has a huge negative impact on unit operation. 3-D CFD method was used to simulate pumping station inlet structure flow based on Eulerian solid-liquid two-phase flow model. Numerical results of preliminary scheme show that sediment deposition occurs in the forebay of pumping station because of poor flow pattern therein. In order to improve hydraulic configuration in the forebay, one modified measure was reconstructing water diversion weir shape, and another measure was setting a water retaining sill in the approach channel. The simulation results of modified scheme prove that back flow in the forebay was eliminated and sediment deposition region was also reduced greatly.
  Number of references:13
  Main heading:Inlet flow
  Controlled terms:  Flood control  -  Pumping plants  -  Three dimensional  -  Three dimensional computer graphics  -  Water supply
  Uncontrolled terms:  3D simulations  -  Inlet structure flow  -  Pumping stations  -  Sediment deposition  -  Two phase flow model
  Classification code:446 Waterworks  -  446.1 Water Supply Systems  -  454.1 Environmental Engineering, General  -  631.1 Fluid Flow, General  -  723.5 Computer Applications  -  902.1 Engineering Graphics
  DOI:10.6041/j.issn.1000-1298.2013.01.010
  Database:Compendex

8. Accession number:20130616000201
  Title:Design and experiment of ground-based agriculture-oriented multi-angle observation device
  Authors:Zhang, Dongyan1 ; Wang, Xiu1 ; Craig, Coburn2 ; Wang, Zhijie2 ; Zhao, Jinling1 ; Hao, Qiang1 
  Author affiliation:1  Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
                  2  Department of Geography, University of Lethbridge, Alberta T1K 3M4, Canada
  Corresponding author:Wang, X. (wangx@nercita.org.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:174-178 173
  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:Currently, most existing multi-angular earth observation equipments are inflexible, have long operation time and light pay-load capacities. To overcome the limitations mentioned above, the ground-based agriculture-oriented multi-angle observation device (GAMOD), oriented to fast acquire crop multi-angular data, was designed. The GAMOD was tested in a soybean field with visible/near-infrared imaging hyperspectral spectrometer (VNIHS) mounted on. It takes 10 min to acquire multi-angular data at four view zenith angles of 0°, 20°, 40° and 60°, under azimuth angles of 0°, 90°, 180° and 270°, respectively. As a result, 3-D structure information of soybean group can be effectively captured by supporting of multi-angular observation.
  Number of references:17
  Main heading:Observatories
  Controlled terms:  Crops  -  Infrared imaging  -  Remote sensing
  Uncontrolled terms:  3D structures  -  Azimuth angles  -  Earth observations  -  Ground based  -  Hyperspectral spectrometer  -  Multi-angle  -  Multi-angle observations  -  Multi-angular data  -  Operation time  -  Soybean fields   -  Zenith angle
  Classification code:443 Meteorology  -  657 Space Physics  -  731.1 Control Systems  -  746 Imaging Techniques  -  821.4 Agricultural Products
  DOI:10.6041/j.issn.1000-1298.2013.01.033
  Database:Compendex

9. Accession number:20130616000217
  Title:Incomplete closure characteristic of piezoelectric pump check valve in high frequency
  Authors:Wu, Yue1 ; Yang, Zhigang1 ; Liu, Yong1 ; Dong, Jingshi1 ; Lin, Feng1 
  Author affiliation:1  Institute of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
  Corresponding author:Yang, Z. (yzg@enpiezo.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:262-266
  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 find the interpretation of the incomplete closure of piezoelectric pump check valve in high frequency, the characteristic of the pump in that working conditions was analyzed, together with the judgment basis and theoretical demonstration of the existence for the phenomenon. The incomplete closure of piezoelectric pump check valve phenomenon was found, and frequency response of the check valve in water was obtained from its dynamic model. The mean force and displacement of valve was calculated in hydrodynamics. Relative reaction of the frequency response and mean displacement were analyzed. Sufficient condition for the check valve incomplete closure was obtained which was amplitude amplification less than 0.25. The results show that check valve can close completely operating at 80 Hz. When the amplitude amplification less than 0.25, the check valve incomplete closure phenomenon was observed at 140 Hz. With further increasing of the frequency, amplitude amplification factor decreases, the phenomenon is more obvious under the condition of low amplitude amplification factor, the minimum clearance between the check valve and valve seat more than 30 μm at 260 Hz.
  Number of references:16
  Main heading:Piezoelectric devices
  Controlled terms:  Amplification  -  Dynamic models  -  Frequency response
  Uncontrolled terms:  Amplification factors  -  Check valves  -  High frequency  -  High frequency vibration  -  Low-amplitude  -  Mean displacement  -  Mean forces  -  Piezoelectric pump  -  Relative reactions  -  Sufficient conditions   -  Valve seats  -  Working principles
  Classification code:704 Electric Components and Equipment  -  714 Electronic Components and Tubes  -  731.1 Control Systems  -  741.1 Light/Optics  -  921 Mathematics
  DOI:10.6041/j.issn.1000-1298.2013.01.049
  Database:Compendex

10. Accession number:20130616000194
  Title:Effects of auto-MA box on qualities and antioxidative enzymes in sweet cherry fruit during storage
  Authors:Wang, Baogang1 ; Hou, Yuru1 ; Li, Wensheng1 ; Feng, Xiaoyuan1 ; Yang, Junjun1 ; Zhang, Kaichun1 
  Author affiliation:1  Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China
  Corresponding author:Feng, X. (xyfeng@yahoo.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:137-141
  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:Sweet cherry fruit (Prunus avium L. cv. Sunburst) were held into auto-modified atmosphere box (MAB). The postharvest qualities and antioxidative enzymes of sweet cherry fruit were investigated at interval. Results showed that CO2 and O2 concentration in MAB were kept at about 11%-12% and 9%-10% after 30 d of storage of sweet cherry fruit. Firmness in fruit stored in MAB was higher than those in control during storage. MAB treatment maintained the higher Vitamin C content, and was effective in inhibition of the declining of soluble solids content in contrast to control, and increased peroxidase (POD), catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX) activity in the early storage. But MAB treatment delayed the increase of pH value, anthocyanin and total phenol content of sweet cherry fruit. MAB treatment inhibited significantly the decay incidence of sweet cherry fruit during storage. The sweet cherry fruit treated by MAB still had good sensory quality significantly after 60 d of storage.
  Number of references:24
  Main heading:Fruits
  Controlled terms:  Carbon dioxide  -  Enzymes  -  Image quality  -  Oxygen  -  Phenols  -  Wood preservation
  Uncontrolled terms:  Anti-oxidative enzymes  -  Ascorbate peroxidase  -  Auto-MA box  -  In-control  -  pH value  -  Postharvest quality  -  Prunus avium  -  Sensory qualities  -  Soluble solids content  -  Superoxide dismutases   -  Sweet cherries  -  Total phenols  -  Vitamin C
  Classification code:741 Light, Optics and Optical Devices  -  803 Chemical Agents and Basic Industrial Chemicals  -  804 Chemical Products Generally  -  821.4 Agricultural Products
  DOI:10.6041/j.issn.1000-1298.2013.01.026
  Database:Compendex

11. Accession number:20130616000172
  Title:Effect of fuel supply system on cyclical combustion variation of DME engine
  Authors:Zhang, Qiang1 ; Li, Na1, 2 ; Zhang, Jiyuan3 ; Li, Guoxiang1 
  Author affiliation:1  School of Energy and Power Engineering, Shandong University, Ji'nan 250061, China
                 2  School of Mechanical Engineering, University of Jinan, Ji'nan 250022, China
                 3  Weichai Power Co. Ltd., Weifang 261001, China
  Corresponding author:Zhang, Q. (sduzhangqiang@sdu.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:17-20 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:The indicator diagram was collected to study the effect of injector parameters and low pressure fuel supply system on cyclical combustion variation of DME as engine. The experimental results showed that the cyclical combustion variation of the DME engine decreased when the nozzle diameter hole diameter was increased. The influence of the nozzle hole on the cyclical combustion variation for the DME engine at high speed was more significant than that of low speed. The cyclical combustion variation increased when the opening pressure of the oil injector was increased at low speed, however it showed the opposite changing trend at high speed. The cyclical combustion variation decreased when the load of the engine was increased. The cyclical combustion variation coefficient showed a trend of first increase and then decrease when the fuel supply advance angle was advanced from BTDC 6°CA to BTDC 13°CA. The cyclical combustion variation could be controlled effectively by adding the volume of the accumulator of the low pressure fuel supply system.
  Number of references:10
  Main heading:Combustion
  Controlled terms:  Engines  -  Fuel systems  -  Jet pumps  -  Nozzles
  Uncontrolled terms:  Changing trends  -  Cyclical combustion variation  -  Fuel supply advance angle  -  Fuel supply systems  -  Hole diameter  -  Indicator diagram  -  Injector parameters  -  Low pressures  -  Low speed  -  Nozzle diameter   -  Nozzle holes  -  Variation coefficient
  Classification code:631.1 Fluid Flow, General  -  618.2 Pumps  -  612 Engines  -  524 Solid Fuels  -  523 Liquid Fuels  -  522 Gas Fuels  -  521.1 Fuel Combustion
  DOI:10.6041/j.issn.1000-1298.2013.01.004
  Database:Compendex

12. Accession number:20130616000191
  Title:Determination of acrylamide contents in fried potato chips based on computer vision
  Authors:He, Peng1 ; Wang, Chenglin1 ; Wan, Xiaoqing1 
  Author affiliation:1  Communication and Electronic Engineering Institute, Qiqihar University, Qiqihar 161006, China
  Corresponding author:He, P. (paper503@163.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:119-124
  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 system of determining acrylamide contents in fried potato chips based on computer vision technology was developed. For each 60 s, the image acquisition device collected double-sided images of potato chips removed from the fryer. The acrylamide contents of the corresponding potato chips were determined by gas chromatography-mass spectrometry (GC-MS) method, meanwhile, the target potato chips of the double-sided images were extracted and L*, a*, b* average of the overall target was measured by proposed image filtering algorithm, the color image segmentation algorithm and the color measurement algorithm, respectively. The obtained data was analyzed and a strong correlation between the average of double-sided a* average and acrylamide contents of potato chips was found (R2=0.971) and a linear regression equation was established. Potato chips double-sided images of 10 different brands sold on the market was collected and the average of double-sided a* average was put into the equation. The maximum relative error between the acrylamide contents calculated and standard chemical method was 4.94%, which indicated that the method was feasible and accurate.
  Number of references:12
  Main heading:Computer vision
  Controlled terms:  Amides  -  Gas chromatography  -  Image segmentation
  Uncontrolled terms:  Acquisition device  -  Acrylamides  -  Chemical method  -  Color image segmentation  -  Color measurements  -  Computer vision technology  -  Determination system  -  Double-sided images  -  Fried potato  -  Gas chromatography-mass spectrometry methods   -  Image filtering algorithms  -  Linear regression equation  -  Maximum relative errors  -  Potato chip  -  Strong correlation
  Classification code:723.5 Computer Applications  -  741.1 Light/Optics  -  801 Chemistry  -  804.1 Organic Compounds
  DOI:10.6041/j.issn.1000-1298.2013.01.023
  Database:Compendex

13. Accession number:20130616000208
  Title:Dynamics of electric pulley conveying cableway system in banana plantation
  Authors:Li, Jun1 ; Yang, Zhou1 ; Lu, Huazhong1 ; Lin, Jinsong1 ; Yan, Liangli1 ; Guo, Jianwei1 
  Author affiliation:1  College of Engineering, South China Agricultural University, Guangzhou 510642, China
  Corresponding author:Yang, Z. (yangzhou@scau.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:211-216
  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 electric pulley cableway system in banana plantation was studied. With the selection of the pulley location, pulley speed, swing angle and swing angular velocity of banana bunch as generalized coordinate variables, the mathematical model was derived with Lagrange equations. The dynamic characteristics were analyzed theoretically and experimentally. The results of virtual test showed that the conveying system with multiple moving mass in series was similar to the hoist system with a single moving mass if the distances between each hook point and banana bunch centroid were equal. The test results illustrated that the proposed dynamic analytical model and virtual prototype model were similar to actual system for analyzing the frequency and amplitude of swing angular velocity. The analytical results of virtual prototype model were basically consistent with the actual data. It is evident that the dynamics analytical model is correct and the virtual prototype model gives the realistic reflection to the system dynamics, which provide theoretical reference for the design and modification of the actual system.
  Number of references:10
  Main heading:Fruits
  Controlled terms:  Analytical models  -  Angular velocity  -  Cables  -  Cableways  -  Dynamics  -  Equations of motion  -  Models  -  Pulleys
  Uncontrolled terms:  Actual system  -  Analytical results  -  Banana plantation  -  Conveying systems  -  Dynamic characteristics  -  Generalized coordinates  -  Hoist systems  -  Lagrange equation  -  Moving mass  -  Swing angle   -  System Dynamics  -  Virtual prototype  -  Virtual tests
  Classification code:931.1 Mechanics  -  921 Mathematics  -  902.1 Engineering Graphics  -  821.4 Agricultural Products  -  692.2 Elevators  -  691.1 Materials Handling Equipment  -  535 Rolling, Forging and Forming
  DOI:10.6041/j.issn.1000-1298.2013.01.040
  Database:Compendex

14. Accession number:20130616000184
  Title:Design and experiment on improved cone penetrometer with embedded force sensor
  Authors:Meng, Fanjia1 ; Sun, Yurui1 ; Wang, Congying1 ; Lin, Jianhui2 
  Author affiliation:1  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
                 2  School of Technology, Beijing Forestry University, Beijing 100083, China
  Corresponding author:Sun, Y. (pal@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:80-84
  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:With the aim to preclude the effect of penetration friction component (PFC) between the penetration shaft and surrounding material during a penetration process, an improved cone penetrometer with a mini force transducer embedded in the cone tip was developed. This kind of cone penetrometer could measure the density of soil and silage correctly. The results showed that the effect of PFC could be negligible in the two kinds of soil samples. But during the density measurement of the two different density chopped maize samples, PFC accounted for 32.56% and 34.05% respectively in the measurement value of force sensor. When there was no resistance on the cone, the measurement value of embedded force sensor was zero, whereas the measurement value of force sensor were about 110 N and 280 N. Appreciable error was found in the original test results for chopped maize.
  Number of references:16
  Main heading:Sensors
  Controlled terms:  Density (specific gravity)  -  Soils
  Uncontrolled terms:  Cone penetrometers  -  Force sensor  -  Force transducers  -  Maize sample  -  Penetration process  -  Silage  -  Soil sample  -  Surrounding materials
  Classification code:483.1 Soils and Soil Mechanics  -  801 Chemistry  -  931.2 Physical Properties of Gases, Liquids and Solids
  DOI:10.6041/j.issn.1000-1298.2013.01.016
  Database:Compendex

15. Accession number:20130616000185
  Title:Simulation on dynamic behavior of soil particle contact with wavy surface
  Authors:Liu, Guomin1, 2 ; Zou, Meng3 ; Xu, Tao1 ; Li, Jianqiao3 
  Author affiliation:1  College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
                  2  Jilin Architectural and Civil Engineering Institute, Changchun 130118, China
                  3  Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
  Corresponding author:Zou, M. (zoumeng@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:85-89
  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:The earthworm's surface was selected as the object to study the mechanism of resistance reduction of wavy surface, and discrete element method (DEM) was used to simulate the dynamic response of the contact soil particle with wavy surface. The results of simulation showed that the contact time was shorter when the particle contacted with wavy surface, and the particle separated at 1.0 s. Macroscopic showed that the porosity was formed between the wavy sample and soil particle. X direction displacement of the contact particle was increased linearly and in the same direction, the average displacement was 60.33 mm. Y direction velocity was changed with the concave-convex of the wavy surface like sinusoidal variation, and generated microseism, the amplitude of the wavy surface was bigger than the smooth surface. Contact position directly determined the size and direction of the contact force. Analysis showed that the amplitude and frequency of the contact particle with wavy surface was greater than smooth surface. The results can supply the reference to design the bionic wavy surface.
  Number of references:14
  Main heading:Finite difference method
  Controlled terms:  Bionics  -  Dynamic response
  Uncontrolled terms:  Bionic wavy surface  -  Contact forces  -  Contact position  -  Contact time  -  ON dynamics  -  Resistance reduction  -  Sinusoidal variations  -  Smooth surface  -  Soil particles  -  Wavy surface
  Classification code:408.1 Structural Design, General  -  731.1 Control Systems  -  921.6 Numerical Methods
  DOI:10.6041/j.issn.1000-1298.2013.01.017
  Database:Compendex

16. Accession number:20130616000207
  Title:Agricultural machine path tracking method based on fuzzy adaptive pure pursuit model
  Authors:Li, Taochang1, 2 ; Hu, Jingtao1, 2 ; Gao, Lei1, 2 ; Liu, Xiaoguang1, 2 ; Bai, Xiaoping1,2 
  Author affiliation:1  Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
                  2  University of Chinese Academy of Sciences, Beijing 100049, China
  Corresponding author:Hu, J. (hujingtao@sia.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:205-210
  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 improve the precision of a navigation control system for agricultural machines, the research on the path tracking method that is the core of an agricultural machine navigation system was carried out. An agricultural machine path tracking method based on fuzzy adaptive pure pursuit model was proposed. The method utilized pure pursuit method to conduct the path tracking control and determined the desired steering angle by combining with the agricultural machine kinematic model. The method made use of fuzzy adaptive control to find out the look-ahead distance online and adaptively, thus the path tracking precision gets enhanced. The results of the path tracking experiment for the agricultural machine show that the max tracking error is within 10 cm and the mean error is no more than 5 cm, so the proposed method can completely satisfy the operation requirement of agricultural machines and the feasibility and effectiveness of the method was verified.
  Number of references:12
  Main heading:Agricultural machinery
  Controlled terms:  Adaptive control systems  -  Agriculture  -  Navigation  -  Navigation systems
  Uncontrolled terms:  Agricultural machine  -  Fuzzy adaptive  -  Fuzzy-adaptive control  -  Kinematic model  -  Look-ahead  -  Mean errors  -  Navigation control systems  -  Path tracking  -  Path tracking control  -  Pursuit method   -  Steering angles  -  Tracking errors
  Classification code:434.4 Waterway Navigation  -  716.3 Radio Systems and Equipment  -  731.1 Control Systems  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  821.1 Agricultural Machinery and Equipment
  DOI:10.6041/j.issn.1000-1298.2013.01.039
  Database:Compendex

17. Accession number:20130616000212
  Title:Dynamics model of 5-DOF parallel robot mechanism
  Authors:Chen, Xiulong1 ; Feng, Weiming1 ; Zhao, Yongsheng2 
  Author affiliation:1  College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China
                 2  College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, 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:1
  Issue date:January 2013
  Publication year:2013
  Pages:236-243
  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-UPU spatial 5-DOF parallel robot mechanism was introduced. A dynamics model of 4-UPS-UPU was presented. The kinematics of the UPS and UPU chain of leg was analyzed and the velocity mapping relationships between the parts and the driving axis were established. The exterior force load and the equivalent driving force were educed. The dynamics model of 4-UPS-UPU parallel robot mechanism was educed by the virtual work principle approach, which was the foundation of the dynamic analysis. Combined with engineering application examples, numerical verification and virtual simulation verification of the results of driving force and constraining torque was carried out.
  Number of references:10
  Main heading:Dynamics
  Controlled terms:  Mechanisms  -  Robots
  Uncontrolled terms:  5-DOF  -  Driving forces  -  Dynamics models  -  Engineering applications  -  Force load  -  Numerical verification  -  Parallel mechanisms  -  Parallel robot mechanisms  -  Velocity mapping  -  Virtual simulations   -  Virtual work principle
  Classification code:601.3 Mechanisms  -  731.5 Robotics  -  931.1 Mechanics
  DOI:10.6041/j.issn.1000-1298.2013.01.044
  Database:Compendex

19.  Accession number:20130616000202
  Title:Measurement system for citrus LAI based on near-infrared reflection
  Authors:Wu, Weibin1 ; Feng, Zhuofeng2 ; Hong, Tiansheng3 ; Hu, Renjie2 ; Mo, Weiping2 ; Huo, Qing2 
  Author affiliation:1  Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
                  2  College of Engineering, South China Agricultural University, Guangzhou 510642, China
                  3  Division of Citrus Machinery, China Agriculture Research System, Guangzhou 510642, China
  Corresponding author:Hong, T. (tshong@scau.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:179-184
  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:In order to construct a fast measurement system for leaf area index (LAI) based on near-infrared reflection, an innovative way was explored to accurately detect the LAI of overlapping leaves. Research methods were concluded as follows: overlapping leaves were put under the direct parallel light generated by the near-infrared laser, and the photoelectric sensors were used to measure the reflected light energy. The output voltage signal of the sensors was sent into the computer through the data acquisition card. The amount of overlapping layers was determined by software programming. The amount of overlapping layers was multiplied by the area of direct beam's light spot was the area of the leaves. The total area of the leaves was the cumulative leaf area in the whole testing process and LAI could be calculated. Based on the result of spectral reflection test, near-infrared was used as direct light source to demarcate the system to get the index fitting model between overlapping leaves' number and measuring voltage, which is notable in 0.05 statistic level. The result of data collection experiment shows that under the method in manual scanning and timing collection, the value of LAI was calculated by the system with 11.01% of the error compared with the true value of LAI calculated by square method.
  Number of references:22
  Main heading:Infrared devices
  Controlled terms:  Data acquisition  -  Light sources  -  Measurements  -  Sensors
  Uncontrolled terms:  Citrus  -  Leaf Area Index  -  Near Infrared  -  Overlapping leaves  -  Photoelectronic sensors
  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  -  801 Chemistry  -  741.3 Optical Devices and Systems  -  723.2 Data Processing and Image Processing
  DOI:10.6041/j.issn.1000-1298.2013.01.034
  Database:Compendex

20. Accession number:20130616000211
  Title:Improvement on Monte Carlo method for robot workspace determination
  Authors:Liu, Zhizhong1, 2 ; Liu, Hongyi1 ; Luo, Zhong1 ; Zhang, Xiuheng1 
  Author affiliation:1  School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China
                  2  School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China
  Corresponding author:Liu, Z. (lzzjzit@163.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:230-235
  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 principle, the algorithm, and the applicable scope of the Monte Carlo method were analyzed. The non-uniform feature of the distribution of random points in workspace was analyzed, as well as the different signification between the points within the workspace and the points on the boundary. The error resulted from spatial workspace slicing was summarized. In order to optimize the boundary accuracy, based on the continuity of the mapping from joint space to workspace, by generating new random joint values in a sufficiently small neighborhood of the existed random joint values corresponding to the boundary points extracted before, new random points in workspace were generated, which distributed around the corresponding old boundary points. Then, from the newly generated points, more accurate boundary points could be extracted. The approach demonstrated to be effective to improve the boundary precision. To reduce the error caused by the slice thickness, in each slice interval, only a thin layer of points were used. A large number of tests illustrate that the algorithm works well.
  Number of references:12
  Main heading:Monte Carlo methods
  Controlled terms:  Algorithms  -  Robots
  Uncontrolled terms:  Boundary points  -  Joint space  -  Random points  -  Slice thickness  -  Thin layers  -  Workspace
  Classification code:723 Computer Software, Data Handling and Applications  -  731.5 Robotics  -  921 Mathematics  -  922.2 Mathematical Statistics
  DOI:10.6041/j.issn.1000-1298.2013.01.043
  Database:Compendex

21. Accession number:20130616000196
  Title:Nondestructive detection of dry weight of cocoons layer of mulberry silkworm fresh cocoons using visible/near infrared spectroscopy
  Authors:Jin, Hangfeng1 ; Huang, Lingxia1 ; Xie, Lin2 ; Jin, Peihua3 ; Lou, Chengfu1 
  Author affiliation:1  College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
                  2  School of Economics, Shanghai University, Shanghai 200444, China
                  3  School of Forestry and Bio-technology, Zhejiang A and F University, Hangzhou 311300, China
  Corresponding author:Huang, L. (lxhuang@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:147-151
  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:Visible/near infrared (Vis-NIR) spectroscopy was investigated to determine the dry weight of the cocoons layer of mulberry silkworm fresh cocoons. Optimal partial least squares (PLS) models were developed with different preprocessing, and the data preprocessed by Savitzky-Golay (SG) smoothing was chosen for the effective wavelengths selection. The selection was operated based on regression coefficients in PLS models, and reduced the original 601 varieties into 7. Then multiple linear regression (MLR) was used for calibration and prediction based on the seven effective wavelengths, compared with the PLS model built on full-spectrum data. The results showed that MLR model was the optimum model for the dry weight of the cocoons layer detection in the process of production and marketing, because of its simple arithmetic and accurate detection. The correlation coefficient and residual predictive deviation were 0.7587 and 2.0464.
  Number of references:14
  Main heading:Plants (botany)
  Controlled terms:  Animals  -  Infrared spectroscopy  -  Linear regression
  Uncontrolled terms:  Dry weight  -  Effective wavelength  -  Mulberry silkworm  -  Nondestructive detection  -  Visible/near infrared spectroscopy
  Classification code:822 Food Technology  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  814 Leather and Tanning  -  922.2 Mathematical Statistics  -  741.1 Light/Optics  -  461.9 Biology  -  461 Bioengineering and Biology  -  471 Marine Science and Oceanography
  DOI:10.6041/j.issn.1000-1298.2013.01.028
  Database:Compendex

22. Accession number:20130616000203
  Title:Diagnosis on potassium nutrition of maize using impedance parameter of leaf tissue juice
  Authors:Liu, Yang1, 2 ; Wang, Tao1, 2 ; Wu, Haiyun2 ; Zuo, Yueming2  
  Author affiliation:1  Department of Electromechanical Technology, Wulanchabu Vocational College, Jining 012000, China
                 2  College of Engineering, Shanxi Agricultural University, Taigu 030801, China
  Corresponding author:Zuo, Y. (zyueming88@yahoo.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:185-189
  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 develop a method for rapid detection of total potassium content in leaf of maize, electrical impedance measuring method was used to collect the electrical impedance parameter of the leaf tissue juice under different potassium levels, and the relationship between impedance value and total potassium content of the leaf were investigated. Using stepwise regression method to choose the sensitive frequency for the total potassium content, every regression model included two sensitive frequencies based on which the linear regression equation was the best with the correlation coefficient of 0.83 at least and root mean squared error of 0.16 at most for four growth periods respectively. Therefore, it was demonstrated that impedance value could be a predictor for maize leaf potassium content. Electrical impedance measuring technology could be an available method for potassium fertilizer recommendation in crop.
  Number of references:16
  Main heading:Potassium
  Controlled terms:  Diagnosis  -  Electric impedance  -  Electric impedance measurement  -  Nutrition  -  Potassium fertilizers  -  Regression analysis  -  Tissue
  Uncontrolled terms:  Correlation coefficient  -  Electrical impedance  -  Growth period  -  Impedance parameters  -  Leaf tissues  -  Linear regression equation  -  Maize  -  Measuring method  -  Measuring technology  -  Rapid detection   -  Regression model  -  Root mean squared errors  -  Stepwise regression method
  Classification code:461 Bioengineering and Biology  -  549.1 Alkali Metals  -  701.1 Electricity: Basic Concepts and Phenomena  -  804.2 Inorganic Compounds  -  922.2 Mathematical Statistics  -  942.2 Electric Variables Measurements
  DOI:10.6041/j.issn.1000-1298.2013.01.035
  Database:Compendex

23. Accession number:20130616000171
  Title:Design and characteristics analysis of free-piston linear alternator with piston-mounted passive inlet valve
  Authors:Wang, Dongjie1 ; Yuan, Chenheng1 ; Xu, Datao1 ; Zuo, Zhengxing1  
  Author affiliation:1  School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
  Corresponding author:Zuo, Z. (zxzuo@bit.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:11-16
  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 free-piston linear alternator with an axial uniflow-scavenged using passive charge valve was designed. The structure and principle of the alternator were introduced. A simulation model of the working process which was validated with the test was established based on dynamics and thermodynamics equation. The motion characteristics and the performance effective factors of the alternator which was beneficial for performance optimization and prototype design were analyzed. The simulation results show that the alternator possesses a longer ventilation time and the duration accounts for about 58% of the whole cycle, which provides sufficient fresh mixture entering the cylinder. The motion curve of piston is non-symmetrical, the acceleration of the free-piston at TDC changes violently and it needs accelerate the combustion heat release rate to adapt to the changes. It should appropriately increase the piston mass and the opening-closing position of the exhaust valve, and reasonably reduce the ignition advanced position and the working pressure of the inlet valve to reach higher output power.
  Number of references:12
  Main heading:Computer simulation
  Controlled terms:  Thermodynamics
  Uncontrolled terms:  Free piston  -  Influence factor  -  Linear alternators  -  Motion characteristics  -  Passive charge
  Classification code:641.1 Thermodynamics  -  723.5 Computer Applications
  DOI:10.6041/j.issn.1000-1298.2013.01.003
  Database:Compendex

24. Accession number:20130616000176
  Title:Numerical analysis for effect of fluid-structure interaction on flow field in screw centrifugal pump
  Authors:Yuan, Shouqi1 ; Xu, Yuping1 ; Zhang, Jinfeng1 ; Pei, Ji1 ; Zhou, Jianjia1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Yuan, S. (shouqi@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:38-42 47
  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 analyze the effect of fluid-structure interaction (FSI) on flow field in screw centrifugal pump, a ZJ200-25 screw type centrifugal pump with double screw blades was chosen as the study subject. The two-way coupling method was established to study the effect of FSI of impeller on flow field in screw centrifugal pump. CFX12.1 and ANSYS Workbench were used to the combined calculation for turbulent flow and structure response of impeller. And the unsteady flow field of the pump was simulated numerically under several operating conditions without effect of FSI. Compared the result of the two calculation methods, it's found that, with the effect of FSI, pressure fluctuations in pump inlet intensified. The dominant frequency of pressure in inlet and outlet do not change but the phase position was different after FSI. The inner velocity distributions satisfy the common characteristic, but the largest differences were appeared under the condition of small flow rate. The flow field near volute tongue was affected by FSI most obviously when blades passing by the tongue. Magnitude of radial trust changing with time has similar regularities, but the fluctuation range with FSI method was reduced. Flow filed in impeller was more dissymmetrical under the effect of fluid-structure interaction. The conclusion obtained in this investigation will provide an essential guide to analyze the inner flow filed and master characteristics of rotor vibration characters and inducing factors of the pressure fluctuation in the screw type centrifugal pump.
  Number of references:12
  Main heading:Screws
  Controlled terms:  Centrifugal pumps  -  Flow fields  -  Fluid structure interaction  -  Impellers  -  Numerical analysis
  Uncontrolled terms:  Dominant frequency  -  Double blade  -  Flow filed  -  Inner flow  -  Operating condition  -  Pressure fluctuation  -  Rotor vibrations  -  Rotor-stator interactions  -  Screw type centrifugal pump  -  Small flow-rate   -  Structure response  -  Two-way coupling
  Classification code:601.2 Machine Components  -  605 Small Tools and Hardware  -  618.2 Pumps  -  631.1 Fluid Flow, General  -  921.6 Numerical Methods
  DOI:10.6041/j.issn.1000-1298.2013.01.008
  Database:Compendex

25. Accession number:20130616000183
  Title:Flow resistance and characteristics of PVC tee pipes
  Authors:Shi, Xi1 ; Lü, Hongxing1 ; Zhu, Delan1 ; Sun, Bin1 ; Cao, Biao1 
  Author affiliation:1  College of Water Resources and Architectural Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
  Corresponding author:Lü, H. (lvhongxing@tom.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:73-79 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:Two kinds of tee pipes DN75×75 and DN75×50 were discussed by test methods and numerical simulation. The results showed that local resistance coefficient of main branch to side branch ζ01 and main branch to straight branch ζ02 decreased with increasing Reynolds number and stabilized after the Reynolds number was greater than 1.5×105. The local resistance coefficient ζ01 and ζ02 was correlated with the flow ratio by second-order parabolic equations. The numerical simulation results were in good with the experimental data. Through those variables other five kinds of tee pipes were simulated numerically. It showed that the local resistance coefficient ζ01 and ζ02 decreased with increasing diameter ratio, and the variable extent of ζ01 was greater than ζ02. Also the expression equation of local resistance coefficient variation with the flow ratio was given simultaneously. Flow characteristics analysis showed that the main reason caused the local resistance coefficient ζ01 due to the loss of direction changes and velocity distribution caused by centrifugal force, and changes ζ02 was due to the vortex motion and velocity gradient in the straight branch caused by water shearing and transverse circulation in the large flow ratio.
  Number of references:22
  Main heading:Polyvinyl chlorides
  Controlled terms:  Computer simulation  -  Partial differential equations  -  Reynolds number
  Uncontrolled terms:  Centrifugal Forces  -  Diameter ratio  -  Direction change  -  Flow characteristic  -  Flow ratios  -  Flow resistance  -  Resistance characteristics  -  Resistance coefficients  -  Second-order parabolic equations  -  Side branches   -  Tee pipes  -  Test method  -  Velocity gradients  -  Vortex motion
  Classification code:631.1 Fluid Flow, General  -  723.5 Computer Applications  -  815.1.1 Organic Polymers  -  921.2 Calculus
  DOI:10.6041/j.issn.1000-1298.2013.01.015
  Database:Compendex

26. Accession number:20130616000181
  Title:Rotor dynamic characteristics of water lubricated bearing for pumps
  Authors:Jiang, Xiaoping1 ; Shi, Weidong1 ; Li, Wei1 ; Ye, Xiaoyan1 ; Hu, Jingning1 ; Tian, Haiping1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Jiang, X. (jxp2502@163.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:62-66
  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 HP multistage pump as example, physical model and mathematical model of its bearing-rotor system were established though appropriate simplified process. Four stiffness coefficients and four damp coefficients which express its dynamic characteristic of the water membrane bearing were deduced and calculated. Rigid support Campbell drawing by multi-load modal analysis on ANSYS considering inertial effect was generated. The fore four natural frequency considering inertial effect and critical speed on the load of 3000 r/min were also obtained. Unbalance response curves of the shafting on working speed and unworking speed were obtained by analysis. This water lubricated bearing-rotor system was certified to be a steady rigid system by transient state characteristic analysis which driving force was feed in a sudden and the rotational speed was considered. Though rather large vibration may appear in the beginning of this period, oscillating amplitude will be reduced gradually and return to stabilization soon.
  Number of references:16
  Main heading:Rigid rotors
  Controlled terms:  Finite element method  -  Lubrication  -  Mathematical models  -  Modal analysis
  Uncontrolled terms:  Bearing-rotor system  -  Campbell  -  Characteristic analysis  -  Critical speed  -  Driving forces  -  Dynamic characteristics  -  Inertial effect  -  Large vibrations  -  Multistage pumps  -  Oscillating amplitudes   -  Physical model  -  Rigid systems  -  Rotational speed  -  Rotor dynamic  -  Stiffness coefficients  -  Transient state  -  Unbalance response  -  Water lubricated bearings  -  Water membrane  -  Working speed
  Classification code:601.2 Machine Components  -  607.2 Lubrication  -  921 Mathematics  -  921.6 Numerical Methods
  DOI:10.6041/j.issn.1000-1298.2013.01.013
  Database:Compendex

27. Accession number:20130616000213
  Title:3-D vision-based kinesthesis teaching control strategy for telerobotics
  Authors:Ni, Tao1 ; Li, Xiaopeng1 ; Zhang, Hongyan1 ; Xu, Peng1 ; Ma, Zhaojian1 
  Author affiliation:1  Institute of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
  Corresponding author:Zhang, H. (zhanghy@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:244-247 243
  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 improve the safety and manipulation performance for telerobotic system, a kinesthesis teaching control strategy for telerobotics was presented. Utilizing the characteristics of human's sensitivity to force information as well as the specific feature of vision's forecast and guidance, the control force of the operator with the virtual forces was merged, including the attraction force from objectives, and the rejection force from obstacles, which were generated from the recognition results of working fields based on vision techniques. Furthermore, it combined the advantages of machine intelligence with human's high-level decision, which could improve effectively the working efficiency as well as local autonomy of tele-robot, and reduce the proficiency requirements of operator. Especially, in a teleoperation system with large time delay, the method could avoid the blinded manipulation of robot caused by lagging transmission of image. The system structure, extraction of the operating environment spatial information and control methods were introduced in detail. The superiority of the proposed control strategy in improving the operating efficiency and security of the telerobotic system were verified by relative experiments.
  Number of references:10
  Main heading:Delay control systems
  Controlled terms:  Artificial intelligence  -  Computer vision  -  Industrial robots  -  Virtual reality
  Uncontrolled terms:  3-D vision  -  Attraction force  -  Control force  -  Control methods  -  Control strategies  -  Large time delay  -  Machine intelligence  -  Operating efficiency  -  Operating environment  -  Spatial informations   -  System structures  -  Tele-robotics  -  Teleoperation systems  -  Telerobotic  -  Telerobotic systems  -  Virtual forces  -  Vision based  -  Vision technique  -  Working efficiency
  Classification code:723 Computer Software, Data Handling and Applications  -  731.1 Control Systems  -  731.6 Robot Applications
  DOI:10.6041/j.issn.1000-1298.2013.01.045
  Database:Compendex

28. Accession number:20130616000205
  Title:Background segmentation and object extraction of apples images
  Authors:Wang, Fujie1, 2 ; Rao, Xiuqin1 ; Ying, Yibin1 
  Author affiliation:1  College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
                  2  College of Mechanical Engineering and Automation, North University of China, Taiyuan 030051, China
  Corresponding author:Rao, X. (xqrao@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:196-199 210
  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 defects, size, color of fruit and the lighting influence the accuracy of segmentation. In order to improve the segmentation accuracy, a combinational method was presented based on apple images processing. The R, G, B components were calculated by arithmetic operations at first. Then the arithmetic result was processed for noise cancellation by morphological opening and for smooth boundary by linear spatial filtering. After these operations, the automatic threshold method was used for background segmentation. This combinational method shows good performance to process 280 images of apples with different attitudes, size, color and defects. And these images were gained in 4 types of illumination conditions. The segmentation deviations of 203 images which are 72.5% of total images are less than 1%. The segmentation deviations of 70 images which are 25% of total images are larger than 1% but less than 2%. Only 7 images' deviations are larger than 2%, and the maximum segmentation deviation is 2.83%.
  Number of references:13
  Main heading:Image segmentation
  Controlled terms:  Defects  -  Fruits
  Uncontrolled terms:  Apple  -  Arithmetic operations  -  Automatic threshold  -  Background segmentation  -  Illumination conditions  -  Images processing  -  Morphological opening  -  Noise cancellation  -  Object extraction  -  Segmentation accuracy   -  Smooth boundary  -  Spatial filterings
  Classification code:423 Non Mechanical Properties and Tests of Building Materials  -  741.1 Light/Optics  -  821.4 Agricultural Products  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2013.01.037
  Database:Compendex

29. Accession number:20130616000189
  Title:Enzymatic hydrolysis of rice straw based on 3,5-dinitrosalicylic acid method
  Authors:Li, Bin1 ; Gao, Xiang1 ; Sun, Qian1 ; Chen, Kunjie1  
  Author affiliation:1  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
  Corresponding author:Chen, K. (kunjiechen@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:106-112
  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 the purpose to improve the conversion rate of reducing sugar of rice straw, the cellulose was used in the enzymatic hydrolysis of rice straw. The content of reducing sugar was detected by 3,5-dinitrosalicylic acid method. The enzyme concentration, hydrolysis time and temperature were selected as inspecting factors. Meantime, comparisons of the enzymatic hydrolysis of rural rice straw with that of steam explosion pretreatment rice straw were made. The results showed when the cellulose weight content taking 10% of the dry rice straw, enzymatic hydrolysis time of 48 h and reaction temperature of 50°C were ideal reaction conditions. The maximum reducing sugar yield of enzymatic hydrolysis original rice straw was 9.7%. The highest reducing sugar yield of enzymatic hydrolysis steam explosion rice straw was approximately 34.3%. Steam explosion pretreatment can obviously improve the production of reducing sugar of enzymatic hydrolysis rice straw, and at the same time accelerate the reaction rate.
  Number of references:21
  Main heading:Enzymatic hydrolysis
  Controlled terms:  Cellulose  -  Explosions  -  Reaction rates  -  Steam  -  Sugars
  Uncontrolled terms:  Conversion rates  -  Enzyme concentrations  -  Pre-Treatment  -  Reaction conditions  -  Reaction temperature  -  Reducing sugars  -  Rice straws  -  Steam explosion  -  Weight content
  Classification code:502.1 Mine and Quarry Operations  -  614 Steam Power Plants  -  801.4 Physical Chemistry  -  804.1 Organic Compounds  -  815.1.1 Organic Polymers
  DOI:10.6041/j.issn.1000-1298.2013.01.021
  Database:Compendex

30. Accession number:20130616000169
  Title:Universal exhaust gas oxygen sensor control system for CNG engine
  Authors:Mao, Xiaojian1 ; Song, Junhua2 ; Wang, Du2 ; Zhang, Bin2 ; Wang, Junxi1 ; Zhuo, Bin1 
  Author affiliation:1  School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
                  2  Technology Center, Shanghai High Energy Automotive Electronic Co. Ltd., Shanghai 200240, China
  Corresponding author:Mao, X. (mxj_sjtu@163.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:1-5
  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 control system of boost CNG Engine based on electronic pressure regulator was studied. The structure and working principle of universal exhaust gas oxygen sensor were analyzed. Based on the main chip MPC561 and integrated CJ125, universal exhaust oxygen sensor control circuit and heater circuit were designed. Based on adaptive algorithm, the A/F ratio closed controller was designed and its control strategy of air-fuel closed loop was discussed. The CNG engine experiments of air-fuel ratio closed loop on bench test showed that the dynamic response of UEGO control system was rapid and accurate. Based on UEGO control system, the intelligent control of engine's air-fuel ratio could be achieved, and the performance of economy and emission could be improved.
  Number of references:10
  Main heading:Control systems
  Controlled terms:  Adaptive algorithms  -  Dynamic response  -  Fuel economy  -  Fuels  -  Gas engines  -  Natural gas  -  Pressure regulators
  Uncontrolled terms:  A/F ratio  -  Air fuel ratios  -  Closed loops  -  CNG engine  -  Control strategies  -  Electronic pressure  -  Heater circuits  -  On-bench tests  -  Sensor control  -  Universal exhaust gas oxygen sensor   -  Working principles
  Classification code:921 Mathematics  -  731.1 Control Systems  -  723 Computer Software, Data Handling and Applications  -  612.3 Gas Turbines and Engines  -  522 Gas Fuels  -  521 Fuel Combustion and Flame Research  -  408.1 Structural Design, General
  DOI:10.6041/j.issn.1000-1298.2013.01.001
  Database:Compendex

31. Accession number:20130616000174
  Title:Mixed combustion performance experiment of syngas produced by ethanol steam reforming for engine
  Authors:Ji, Changwei1 ; Ju, Bingjie1 ; Dai, Xiaoxu1 
  Author affiliation:1  College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
  Corresponding author:Ji, C. (chwji@bjut.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 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:Aiming at solving the difficulties in hydrogen on-board storage and carriage, a self-designed system was designed in an SI gasoline engine to recover the exhaust heat and produce hydrogen by the ethanol steam reforming. The engine intake manifolds were specially modified so that the produced syngas could be injected and mixed with gasoline simultaneously. During the experiment, the engine was kept at 1800 r/min and a manifolds absolute pressure of 61.5 kPa. The combustion and emissions performance of the 2.5% syngas-enriched gasoline engine was compared with that of the original engine under various excess air ratios. The experimental results demonstrated that the enhancement of excess air ratio could improve the hydrogen volume fraction whereas reduce the CO concentration in the syngas. The blending of syngas was beneficial for accelerating the flame development and propagation, elevating the indicated thermal efficiency and reducing the HC emissions. Meanwhile, the CO and NOx emissions were slightly increased after the syngas addition.
  Number of references:20
  Main heading:Automobile engine manifolds
  Controlled terms:  Blending  -  Combustion  -  Engines  -  Ethanol  -  Experiments  -  Gasoline  -  Hydrogen  -  Hydrogen storage  -  Particulate emissions  -  Steam reforming   -  Synthesis gas
  Uncontrolled terms:  Absolute pressure  -  CO and NO  -  CO concentrations  -  Combustion performance  -  Emissions performance  -  Engine intake  -  Ethanol steam reforming  -  Excess air ratios  -  Exhaust heat  -  Flame development   -  Gasoline engines  -  HC emissions  -  Hydrogen volume fraction  -  Indicated thermal efficiency  -  SI Engines  -  Syn-gas  -  Syngas addition
  Classification code:804 Chemical Products Generally  -  802.3 Chemical Operations  -  802.2 Chemical Reactions  -  661.2 Automotive Engine Components  -  901.3 Engineering Research  -  612 Engines  -  522 Gas Fuels  -  521.1 Fuel Combustion  -  451.1 Air Pollution Sources  -  523 Liquid Fuels
  DOI:10.6041/j.issn.1000-1298.2013.01.006
  Database:Compendex

32. Accession number:20130616000216
  Title:Experiment and drag reduction mechanism of bionic excavator tooth during soil cutting
  Authors:Zhang, Yan1 ; Huang, He2 ; Ren, Luquan2  
  Author affiliation:1  College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China
                 2  Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
  Corresponding author:Ren, L. (lqren@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:258-261 229
  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 bionic excavator tooth was developed, which is bio-inspired and based on the morphology of the toe of mole cricket foreleg claw. The profile line of the mole cricket's toe was fitted by using polynomial fitting method. The bionic tooth specimens were fabricated by a rapid prototyping machine. The cutting resistances of the bionic tooth and JL80 tooth specimens were measured during soil cutting. The experimental results show that the cutting resistances of bionic tooth is about 11% lower than that of JL80 tooth. The force analysis indicates that the bionic tooth is more likely to form self-sharpening blade so that the cutting performance of the tooth can be maintained. Besides, the bionic tooth is convenient for reducing the cutting angle, which can help for the reduction of cutting resistance, without changing the design and working condition of the excavator.
  Number of references:15
  Main heading:Bionics
  Controlled terms:  Construction equipment  -  Excavation  -  Excavators  -  Experiments  -  Metal drawing  -  Rapid prototyping  -  Soils
  Uncontrolled terms:  Bio-inspired  -  Bionic engineering  -  Cutting angles  -  Cutting performance  -  Cutting resistance  -  Drag reduction mechanism  -  Force analysis  -  Mole cricket  -  Polynomial fitting method  -  Self-sharpening   -  Soil cuttings
  Classification code:901.3 Engineering Research  -  731.1 Control Systems  -  723.5 Computer Applications  -  535.2 Metal Forming  -  483.1 Soils and Soil Mechanics  -  405.2 Construction Methods  -  405.1 Construction Equipment
  DOI:10.6041/j.issn.1000-1298.2013.01.048
  Database:Compendex

33.  Accession number:20130616000192
  Title:Real-time monitoring system for grain moisture content based on equilibrium moisture model
  Authors:Liang, Kun1 ; Shen, Mingxia1 ; Lu, Shuntao1 ; Liu, Zhiqiang1 ; Li, Xiaolin1 
  Author affiliation:1  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
  Corresponding author:Shen, M. (mingxia@njau.edu.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:125-130
  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 real-time monitoring system for grain moisture content in grain storage was developed based on equilibrium moisture model, wireless sensor network and embedded technology. The error and precision which forecast by the equilibrium moisture model of modified Henderson, modified Chung-Pfost and modified Owin were verified in this experiment. The results showed that there was high precision in the modified Chung-Pfost model. Moreover, the prediction result was with higher accuracy when A was 363.06, B was 0.1804, and C was 26.674. It was indicated that the system was able to realize stable data transmission by testing the transmission quality of sensor nod. This study presented a new method for real-time monitoring rough moisture content in grain storage, which was important significance for ensuring grain safety in storage.
  Number of references:23
  Main heading:Monitoring
  Controlled terms:  Data communication systems  -  Grain (agricultural product)  -  Low temperature drying  -  Moisture  -  Moisture determination  -  Wireless sensor networks
  Uncontrolled terms:  Embedded technology  -  Equilibrium moisture  -  Grain moisture content  -  Grain storage  -  High precision  -  Real time monitoring  -  Real-time monitoring systems  -  Transmission quality
  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  -  821.4 Agricultural Products  -  802.3 Chemical Operations  -  801.4 Physical Chemistry  -  732 Control Devices  -  723 Computer Software, Data Handling and Applications  -  718 Telephone Systems and Related Technologies; Line Communications  -  717 Optical Communication  -  716 Telecommunication; Radar, Radio and Television
  DOI:10.6041/j.issn.1000-1298.2013.01.024
  Database:Compendex

34.  Accession number:20130616000186
  Title:Comparison of fragmentation properties and remolding techniques for clay soil
  Authors:Ding, Qishuo1 ; Shen, Fengyue1 ; Ding, Weimin1 ; Li, Yinian1 ; Pan, Genxing2 ; Ji, Changying1 
  Author affiliation:1  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
                 2  Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
  Corresponding author:Ding, W. (wmding@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:90-94
  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:Non-standard Proctor compaction as a soil remolding technique was compared with hand-rolling method. Non-standard Proctor compaction modified soil physical states in a large, stable and controlled manner, allowing the investigation of the co-relationship among soil density, water content, compacting work and specific soil fragmentation energy possible. It was found that density alone did not reflect cohesive soil compaction precisely; in contrary the specific fragmentation energy was more sensitive to inter-aggregate cohesion force. Therefore there is a need to refine the habit of using soil density or relative compaction as a proxy for modeling the specific traction in soil tillage research. The combined procedure of non-standard Proctor compaction and fragmentation test provided an increased exponential trend of specific fragmentation energy with respect to soil water content, while the fractal dimension of soil fragments decreased.
  Number of references:28
  Main heading:Compaction
  Controlled terms:  Agriculture  -  Fractal dimension  -  Soil mechanics  -  Soil moisture
  Uncontrolled terms:  Clay soil  -  Cohesion force  -  Cohesive soils  -  Exponential trends  -  Fragmentation energy  -  Fragmentation properties  -  Physical state  -  Relative compaction  -  Soil density  -  Soil fragments   -  Soil tillage  -  Soil water content
  Classification code:483.1 Soils and Soil Mechanics  -  536.1 Powder Metallurgy Operations  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  921 Mathematics
  DOI:10.6041/j.issn.1000-1298.2013.01.018
  Database:Compendex

35.  Accession number:20130616000199
  Title:Effect of membrane separation technology on VMD of glutamic acid
  Authors:Yang, Shichun1, 2 ; Lü, Xiaolong1 
  Author affiliation:1  Institute of Biological Land Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160, China
                 2  Center of Agricultural Analysis and Testing, Tianjin Agricultural University, Tianjin 300384, China
  Corresponding author:Yang, S. (yangshichun@tjau.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:162-166
  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 the 11% glutamic acid fermented liquid as testing samples, the effects of vacuum membrane distillation technology on the VMD of glutamic acid, decolorization and reuse of waste water were explored. The effects of heating temperature and concentration multiple on VMD enrich were also examined. The research results indicated that in the VMD process, with the membrane distillation technology, the glutamic acid concentrate in the glutamic acid filtrate liquid and the decolorization liquid was increased from 11% to 63.2% and 11% to 65.17%, respectively. Decolorizing process by using active carbon was able to reduce membrane fouling and improve membrane flux. After L9(34) orthogonal decolorizing test, variance analysis result showed that active carbon was the priority factor to decolorization. The level of activated carbon was 30 g/L. The decolorization time was 0.5 h and the revolving speed was 120 r/min. The results of water product on membrane distillation and GC testing indicated that the peak time of seven volatile substances in water product were similar to the glutamic acid filtrate and they were inferred the same materials. Therefore, the water product by filtrate membrane distillation can be reused to original fermentation liquid and improve water utilization efficiency.
  Number of references:15
  Main heading:Filtration
  Controlled terms:  Activated carbon  -  Amino acids  -  Factor analysis  -  Liquids  -  Materials testing  -  Membrane fouling  -  Wastewater reclamation  -  Water conservation
  Uncontrolled terms:  Decolorization  -  Glutamic acid  -  Membrane distillation  -  Performance analysis  -  Water products
  Classification code:931.2 Physical Properties of Gases, Liquids and Solids  -  922.2 Mathematical Statistics  -  804 Chemical Products Generally  -  802.3 Chemical Operations  -  951 Materials Science  -  461 Bioengineering and Biology  -  444 Water Resources  -  423 Non Mechanical Properties and Tests of Building Materials  -  422 Strength of Building Materials; Test Equipment and Methods  -  452.4 Industrial Wastes Treatment and Disposal
  DOI:10.6041/j.issn.1000-1298.2013.01.031
  Database:Compendex

36.  Accession number:20130616000187
  Title:Risk assessment of groundwater environment for irrigation district in western Jilin Province based on catastrophe theory
  Authors:Zhang, Duanmei1 ; Liang, Xiujuan1 ; Li, Qinwei2 ; Jiang, Xue1 ; Zhai, Tianfang1, 3 
  Author affiliation:1  College of Environment and Resources, Jilin University, Changchun 130021, China
                 2  Jilin Electric Power Survey and Design Institute, Changchun 130022, China
                 3  Water Resources Research Institute of Jilin Province, Changchun 130022, China
  Corresponding author:Liang, X. (lax64@126.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:95-100
  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:As irrigation water for irrigation area, irrigation return water supply from surface water was prone to soil secondary salinization. Four evaluating elements and seventeen evaluating factors, including the natural condition, water environment, soil environment and socio-economic environment, were chosen to constitute the index system of groundwater environment for irrigation district in western Jilin province. The catastrophe theory was used in analyzing the groundwater environment. The analysis results show that Wujiazi irrigation district, Daan irrigation district and Songyuan irrigation district belong to the slight risks. The risk values were 0.9206, 0.9303 and 0.9196, respectively. Groundwater environment for irrigation district in western Jilin had some risk.
  Number of references:13
  Main heading:Irrigation
  Controlled terms:  Groundwater  -  System theory  -  Water supply
  Uncontrolled terms:  Assessment index system  -  Catastrophe theory  -  Groundwater environment  -  Index systems  -  Irrigation area  -  Irrigation districts  -  Irrigation waters  -  Jilin Province  -  Natural conditions  -  Return water   -  Risk value  -  Socio-economic environments  -  Soil environment  -  Water environments
  Classification code:444.2 Groundwater  -  446.1 Water Supply Systems  -  821.3 Agricultural Methods  -  961 Systems Science
  DOI:10.6041/j.issn.1000-1298.2013.01.019
  Database:Compendex

37.  Accession number:20130616000175
  Title:Effect of DNTP on thermogravimetric characteristics and morphology of diesel PM
  Authors:Han, Wenhe1 ; Cai, Yixi1 ; Li, Xiaohua1 ; Zhang, Lin1 ; Jiang, Fei1 ; Dong, Miao1 
  Author affiliation:1  School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Cai, Y. (qc001@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:33-37
  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:TGA, SEM and TEM were used to investigate the variation of PM properties before and after the treatment of direct nonthermal plasma, including the content of elemental carbon and volatile fractions, the surface morphology and the accumulation form of primary particles. The results showed that with the increasing of load, the content of elemental carbon grew and the morphology changed from accumulated clusters to folium piles and then to porous sponge, and the accumulation of primary particles changed from simple fractal block with high thickness into complex fractal stripes. After the treatment of DNTP, the content of elemental carbon grew and the morphology variation versus diesel load was similar to that of before treatment but presented dendrite structure at full load. Accumulation form of primary particles was similar with that of untreated PM obtained at full load, indicating the volatile fractions with high viscosity can be decomposed effectively by DNTP.
  Number of references:9
  Main heading:Morphology
  Controlled terms:  Carbon  -  Fractals
  Uncontrolled terms:  Dendrite structures  -  Diesel  -  Elemental carbon  -  Full-load  -  High viscosities  -  Nonthermal plasma  -  Particulate Matter  -  Primary particles  -  SEM and TEM  -  Thermogravimetric characteristics   -  Volatile fractions
  Classification code:804 Chemical Products Generally  -  921 Mathematics  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2013.01.007
  Database:Compendex

38. Accession number:20130616000173
  Title:Modeling and experiment of electromagnetic linear actuator for fuel injector of engine
  Authors:Shi, Yan1 ; Chang, Siqin1 
  Author affiliation:1  School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  Corresponding author:Shi, Y. (peter19799275@163.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 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:Based on the theory of permanent magnet latching, an electromagnetic linear actuator (EMLA) for a fuel injector of engine was presented. Using method of equivalent magnetic circuit, the dynamic model of the EMLA was established. Eddy current, dimensions of components, and fringing effect were taken into account in modeling. Using PWM method and H-bridge driver circuit, the prototype of the EMLA was tested on the test bed. The experimental and simulated data agreed well and the model was validated. The results show that under 0.5 MPa supply pressure, the transition time of the EMLA was 1.57 ms over 0.25 mm stroke. The EMLA had good transient characteristics and met the working requirement of the fuel injector. Furthermore, because of no holding current, the fuel economy of engine was improved.
  Number of references:16
  Main heading:Linear actuators
  Controlled terms:  Computer simulation  -  Control  -  Electromagnetism  -  Equipment testing  -  Fuel economy  -  Fuel injection  -  Magnetic circuits  -  Voltage control
  Uncontrolled terms:  Driver circuit  -  Electronic controls  -  Equivalent magnetic circuit  -  Fringing effects  -  Fuel injectors  -  Gasoline engines  -  H-bridges  -  Holding current  -  Supply pressure  -  Transient characteristic   -  Transition time
  Classification code:943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  732.1 Control Equipment  -  732 Control Devices  -  944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  731.3 Specific Variables Control  -  723.5 Computer Applications  -  701.2 Magnetism: Basic Concepts and Phenomena  -  701 Electricity and Magnetism  -  521 Fuel Combustion and Flame Research  -  731 Automatic Control Principles and Applications
  DOI:10.6041/j.issn.1000-1298.2013.01.005
  Database:Compendex

39. Accession number:20130616000198
  Title:Dynamics of total sugar and starch degradation in protein feed fermentation production using Panax notoginseng residues
  Authors:Tan, Xiandong1 ; Wang, Junjun1 ; Duan, Yaning1 ; Yang, Yijin1 ; Liu, Jianying1 
  Author affiliation:1  College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
  Corresponding author:Tan, X. (jacktxd@sina.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:157-161 156
  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 total sugar, starch and reducing sugar, yield and pH value change were thoroughly studied in solid state fermentation for protein feed production from Panax notoginseng residues. The related degradation kinetic model of total sugar and starch was established as well. The results showed a four-parameter model matched well the degradation kinetics of total sugar and starch and predicted the change of total sugar and starch contents relatively accurately. The half-life of total sugar and starch were determined as 58.32 h and 42.47 h, respectively. The peaks of degradation rate were observed at 46.1 h and 29.1 h, respectively. The average degradation rates of both total sugar and starch in the fast degradation stage were twice more than those in the slow degradation stage. It was found that the average degradation rate of starch was greater than that of total sugar in the fast degradation stage, but oppositely less in the slow degradation stage.
  Number of references:21
  Main heading:Sugars
  Controlled terms:  Degradation  -  Dynamics  -  Fermentation  -  Proteins  -  Starch
  Uncontrolled terms:  Degradation dynamics  -  Degradation kinetics  -  Degradation rate  -  Four-parameter model  -  Panax notoginseng  -  pH value  -  Reducing sugars  -  Slow degradation  -  Solid-state fermentation  -  Starch contents   -  Starch degradation
  Classification code:802.2 Chemical Reactions  -  804.1 Organic Compounds  -  931.1 Mechanics
  DOI:10.6041/j.issn.1000-1298.2013.01.030
  Database:Compendex

40. Accession number:20130616000206
  Title:Intelligent operation control system for rice transplanter based on GPS navigation
  Authors:Guo, Na1, 2 ; Hu, Jingtao1, 2 ; Wang, He1, 2 
  Author affiliation:1  Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
                  2  University of Chinese Academy of Sciences, Beijing 100049, China
  Corresponding author:Hu, J. (hujingtao@sia.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:200-204
  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 meet the demands of intelligent agriculture and realize the automatic operation of rice transplanter in the field, the intelligent operation control system based on GPS navigation technique was developed. This system functionality includes automatic operation of rice transplant and automatic control of the traveling speed according to the prescription map. The YANMAR VP6 rice transplanter's manual operation was transformed into electric control. The road experiment with GPS navigation system was accomplished on this platform. The results indicated that the electric control of the transplant operation performed accurately, the maximum average error of speed control was 0.0113 m/s, and the speed control precision reached the requirement of the rice transplanter.
  Number of references:15
  Main heading:Global positioning system
  Controlled terms:  Automation  -  Control systems  -  Navigation  -  Navigation systems  -  Speed control
  Uncontrolled terms:  Average errors  -  Control precision  -  Electric control  -  GPS navigation  -  Intelligent operations  -  Manual operations  -  Operation control  -  Prescription map  -  Rice transplanter  -  System functionality
  Classification code:434.4 Waterway Navigation  -  716.3 Radio Systems and Equipment  -  731 Automatic Control Principles and Applications  -  732 Control Devices
  DOI:10.6041/j.issn.1000-1298.2013.01.038
  Database:Compendex

41. Accession number:20130616000182
  Title:Hydraulic performance robustness analysis for drip irrigation triangle labyrinth channel of emitter
  Authors:Liu, Chunjing1, 2 ; Tang, Dunbing1 ; He, Hua2 ; Chen, Xingqiang2 
  Author affiliation:1  College of Mechanical and Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
                 2  Department of Mechanical and Electronic Engineering, College of Bengbu, Bengbu 233030, China
  Corresponding author:Tang, D. (d.tang@nuaa.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:67-72
  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:Considering the complicated relation of triangle labyrinth channel parameters to hydraulic performance, the explicit analytical model was not figured out. Moving least squares response surface methodology was introduced to build parameter sensitivity model corresponding to reliability of hydraulic performance. The analysis of parameter sensitivity shows that the length and the width of triangle labyrinth channel parameters have great influence on the reliability of flux coefficient. Meanwhile, the width, and the angle of triangle labyrinth channel parameters have great influence on the reliability of flow index. Standard deviation increasing in the parameters of triangle labyrinth channel will reduce the reliability of flux coefficient and flow index. The reliability sensitivity analysis for hydraulic performance demonstrates that the result of presented method is accord with the qualitative analysis. Thus the proposed method is efficient and accurate.
  Number of references:18
  Main heading:Reliability analysis
  Controlled terms:  Irrigation  -  Surface properties
  Uncontrolled terms:  Build Parameters  -  Channel parameter  -  Drip irrigation  -  Flow indices  -  Flux coefficients  -  Hydraulic performance  -  Moving least squares  -  Moving least squares method  -  Parameter sensitivities  -  Qualitative analysis   -  Reliability sensitivity analysis  -  Response surface methodology  -  Standard deviation
  Classification code:821.3 Agricultural Methods  -  913 Production Planning and Control; Manufacturing  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2013.01.014
  Database:Compendex

42.  Accession number:20130616000210
  Title:Acquisition method for principle solution of mechanical patent
  Authors:Xue, Chi1 ; Qiu, Qingying1 ; Feng, Peien1 ; Deng, Kun1 
  Author affiliation:1  State Key Laboratory of CAD and CG, Zhejiang University, Hangzhou 310027, China
  Corresponding author:Qiu, Q. (medesign@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:222-229
  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 problems of the existed acquisition method and representation method for patent technical solution were discussed. A new knowledge acquisition method for mechanical patent's principle solution including the acquisition task of technical object and technical relationship was proposed. Based on extensible markup language schema definition (XSD) and unified modeling language (UML), the representation model of patent technical solution was built up. According to the characteristics of mechanical patent's text, technical object with the method of maximum entropy principle and patent term dictionary was acquired. The composition verb database was established and technical relationship was acquired. This method has some advantages such as the intuitionistic representation of the patent knowledge and the feature that the knowledge was automatically processed by computer. A whole process involved the steps like acquiring the principle knowledge from patent documents, writing the knowledge into XSD and transforming XSD to the representation model was illustrated with a US patent in detail. The model and process laid the foundation for the efficient utilization of patent knowledge.
  Number of references:11
  Main heading:Patents and inventions
  Controlled terms:  Knowledge acquisition  -  Knowledge representation  -  Mergers and acquisitions  -  Unified Modeling Language  -  XML
  Uncontrolled terms:  Maximum entropy principle  -  Patent documents  -  Patents  -  Principle solution  -  Representation method  -  Representation model  -  Technical objects  -  Technical solutions  -  UML  -  US patents   -  Whole process  -  XSD
  Classification code:723 Computer Software, Data Handling and Applications  -  901.3 Engineering Research  -  912 Industrial Engineering and Management
  DOI:10.6041/j.issn.1000-1298.2013.01.042
  Database:Compendex

43.  Accession number:20130616000170
  Title:Piston motion control method of four-stroke free-piston generator
  Authors:Xu, Zhaoping1 ; Chang, Siqin1 ; Lin, Jiming1 
  Author affiliation:1  School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  Corresponding author:Xu, Z. (xuzp@njust.edu.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:6-10 16
  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 motion controller was designed to achieve stable running of a four-stroke free-piston linear generator. Simulation model of the free-piston motion controller was built based on the control theory of hybrid system. Motion control process was analyzed by using the proposed model and the model of a free-piston linear generator. Effects of circulation burning fluctuations and misfires were discussed. Based on the results of the simulation, an electronic control system was designed by using a high-performance digital signal processor. Testing results of the electronic control system were analyzed in detail. According to the simulated and tested results, the designed motion controller has the advantages of simplicity and reliability. It satisfies the requirement of four-stroke free-piston linear generator for piston motion control.
  Number of references:13
  Main heading:Motion control
  Controlled terms:  Computer simulation  -  Control systems  -  Hybrid systems  -  Industrial electronics  -  Servomechanisms  -  Signal processing
  Uncontrolled terms:  Control methods  -  Control process  -  Electronic control systems  -  Four-stroke  -  Free piston  -  Free-piston generator  -  Linear generators  -  Motion controller  -  Simulation model  -  Testing results
  Classification code:921 Mathematics  -  731.3 Specific Variables Control  -  731.1 Control Systems  -  723.5 Computer Applications  -  716.1 Information Theory and Signal Processing  -  716 Telecommunication; Radar, Radio and Television  -  715 Electronic Equipment, General Purpose and Industrial  -  714 Electronic Components and Tubes  -  705 Electric Generators and Motors
  DOI:10.6041/j.issn.1000-1298.2013.01.002
  Database:Compendex

44 . Accession number:20130616000188
  Title:Continuous anaerobic co-digestion of rice straw and cow manure for biogas production
  Authors:Li, Dong1 ; Ye, Jingqing2 ; Sun, Yongming1 ; Zhen, Feng1 ; Yuan, Zhenhong2 
  Author affiliation:1  Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
                  2  Key Laboratory of Renewable Energy and Natural Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, China
  Corresponding author:Sun, Y. (sunym@ms.giec.ac.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:101-105 100
  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:Using rice straw and cow manure (volatile solid ration 1:1) as materials, continuous anaerobic co-digestions were carried out to investigate the effects of organic loading rate (OLR) and temperature on stability and performance. The experimental results showed that, for thermophilic digestion, volumetric biogas production rate (VBPR) increased with increasing of OLR and the maximum VBPR was 5.26 m3/(m3·d). The maximum average specific biogas production (SBP) of 489.6 L/kg was obtained at OLR of 3.6 kg/(m3·d). For mesophilic digestion, biogas production was seriously inhibited by volatile fatty acids (VFAs) at OLR of 12 kg/(m3·d). During the OLR of 3-8 kg/(m3·d), VBPR gradually increased with the maximum of 2.57 m3/(m3·d). The maximum average SBP of 440.0 L/kg was obtained at OLR of 3.6 kg/(m3·d). When the OLR increased to 8 kg/(m3·d), serious sludge expanding was observed both in thermophilic and mesophilic system.
  Number of references:15
  Main heading:Anaerobic digestion
  Controlled terms:  Biogas  -  Loading  -  Manures  -  Volatile fatty acids
  Uncontrolled terms:  Anaerobic co-digestion  -  Biogas production  -  Cow manure  -  Mesophilic  -  Organic loading rates  -  Rice straws  -  Thermophilic digestion  -  Volatile solid
  Classification code:452.3 Industrial Wastes  -  452.4 Industrial Wastes Treatment and Disposal  -  522 Gas Fuels  -  672 Naval Vessels  -  804.1 Organic Compounds
  DOI:10.6041/j.issn.1000-1298.2013.01.020
  Database:Compendex

45.  Accession number:20130616000195
  Title:Effects of combined pulsed electric field and heat treatment on texture characteristics of whey protein gels
  Authors:Jin, Shenglang1, 2 ; Yin, Yongguang2 ; Wang, Ying3 
  Author affiliation:1  Tourism College, Huangshan University, Huangshan 245021, China
                 2  College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
                 3  School of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
  Corresponding author:Yin, Y. (biofood@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:142-146
  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:By using whey protein isolate as the target, some treating conditions affecting the hardness, elasticity and water holding capacity of the whey protein gels were investigated by the single-factor experiments, among which the electric field strength, pulse numbers and heating temperature varied from 15 to 55 kV/cm, 2 to 8 and 50 to 90°C, respectively. The research found that properties of the formed gel have shown significant change after being treated by the high intensity pulsed electric field. Compared with whey protein without effect from the high intensity pulsed electric field, the hardness, elasticity and water holding capacity of gel decreased when the electric field strength varied from 15 to 25 kV/cm, increased significantly when the electric field strength was 35 kV/cm, but decreased again when the electric field strength was 45 kV/cm. When the electric field strength was 35 kV/cm, the hardness, elasticity and water holding capacity of gel strengthened with the increase of pulse number, but the later amplification was not remarkable. When heating temperature was 80°C, the hardness and elasticity of gel reached their best. The water holding capacity showed optimal performance when heating temperature was 70°C.
  Number of references:20
  Main heading:Electric fields
  Controlled terms:  Elasticity  -  Gels  -  Hardness  -  Proteins
  Uncontrolled terms:  Electric field strength  -  Heating temperatures  -  High-intensity pulsed electric fields  -  Optimal performance  -  Pulse number  -  Pulsed electric field  -  Texture characteristics  -  Water holding capacity  -  Whey protein isolate  -  Whey proteins
  Classification code:421 Strength of Building Materials; Mechanical Properties  -  422 Strength of Building Materials; Test Equipment and Methods  -  701.1 Electricity: Basic Concepts and Phenomena  -  804 Chemical Products Generally  -  804.1 Organic Compounds  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2013.01.027
  Database:Compendex

46.  Accession number:20130616000204
  Title:Advance techniques and equipments for real-time weed detection
  Authors:Mao, Wenhua1 ; Zhang, Yinqiao1 ; Wang, Hui1 ; Zhao, Bo1 ; Zhang, Xiaochao1  
  Author affiliation:1  Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
  Corresponding author:Zhang, X. (zxc@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:1
  Issue date:January 2013
  Publication year:2013
  Pages:190-195
  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:Real-time infield weed detection is the most important technique of the precision infield weeds control. The real-time weed detection equipment is a key of the site specific weed management. Currently research is being carried out relating to weed sensor based on the spectroscopic, imaging and spectral imaging techniques. Theses advance technologies and equipments were reviewed for application them in China. The weed detection technique based on spectroscopic is suitable for classifying weeds from soil background without crop seedlings, such as the WeedSeeker and Weed-IT. The weed detection technique based on imaging is appropriate for discriminating inter-row weeds, including the Robocrop InRow mechanical weed control machine and the vision navigation product of the Autopilot, Cam Pilot and Robocrop, etc. The weed detection technique based on spectral imaging is more appropriate for distinguishing intra-row weeds, and a joint research on microphotonic plant discrimination and weed control sensor has been done by China and Australia. It is still a continuous project that how to detect infield weeds in real-time and specific under the complex and open field environment.
  Number of references:44
  Main heading:Weed control
  Controlled terms:  Agriculture  -  Computer vision  -  Equipment  -  Imaging techniques  -  Sensors  -  Spectroscopy
  Uncontrolled terms:  Australia  -  Crop seedlings  -  Precision farming  -  Real-time acquiring  -  Site-specific  -  Spectral imaging  -  Spectral imaging technique  -  Vision navigation  -  Weed detection  -  Weed management
  Classification code:901 Engineering Profession  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  803 Chemical Agents and Basic Industrial Chemicals  -  801 Chemistry  -  746 Imaging Techniques  -  741.2 Vision  -  741 Light, Optics and Optical Devices
  DOI:10.6041/j.issn.1000-1298.2013.01.036
  Database:Compendex

47.  Accession number:20130616000200
  Title:Remote monitoring system of crop environment and growing based on WMSN
  Authors:Yang, Xinting1 ; Wu, Tao1, 2 ; Sun, Chuanheng1 ; Liu, Yande2 ; Zhou, Chao1 
  Author affiliation:1  National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
                 2  School of Mechatronics Engineering, East China Jiaotong University, Nanchang 330013, China
  Corresponding author:Yang, X. (yangxt@nercita.org.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:167-173
  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 current field monitoring is mainly physical data and lack of multimedia data. A remote monitoring system of crop environment and growing was designed based on WMSN. Firstly, the advantages of the proposed system were analyzed. Then, the key parts of the hardware circuit of Hi3512 and CC2430 and software systems were designed. The key issues of fusion of the crop physical environment and multimedia growing information were resolved. Finally, the temperature and humidity, light intensity, and four-channel video signal in different monitoring points in the four greenhouses were monitored dynamically. The results show that the environment of the crop growing remote monitoring system is stable and accurate. Multimedia data acquisition, H.264 compression, 3G transmission, display on PC could be achieved, together with ZigBee networking including temperature, humidity and light intensity sensor nodes.
  Number of references:22
  Main heading:Remote control
  Controlled terms:  Crops  -  Cultivation  -  Embedded systems  -  Image compression  -  Monitoring  -  Sensor nodes  -  Zigbee
  Uncontrolled terms:  Crop production  -  Current fields  -  Four-channel  -  Hardware circuits  -  Key parts  -  Light intensity  -  Monitoring points  -  Multimedia data  -  Physical data  -  Physical environments   -  Remote monitoring system  -  Software systems  -  Video signal  -  WMSN  -  Zigbee networking
  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  -  821.4 Agricultural Products  -  821.3 Agricultural Methods  -  741 Light, Optics and Optical Devices  -  731.1 Control Systems  -  723 Computer Software, Data Handling and Applications  -  722.3 Data Communication, Equipment and Techniques  -  722 Computer Systems and Equipment
  DOI:10.6041/j.issn.1000-1298.2013.01.032
  Database:Compendex

48. Accession number:20130616000214
  Title:Fractal contact model of joint interfaces considering elastic-plastic deformation of asperities
  Authors:Miao, Xiaomei1 ; Huang, Xiaodiao1 ; Yuan, Hong1 
  Author affiliation:1  School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China
  Corresponding author:Huang, X. (njgdhxd@189.cn) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:248-252
  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 fractal model of joint interfaces was established based on fractal contact theory. The elastic-plastic deformation of asperities was taken into account in the model. By numerical simulation, the nonlinear relationship between the contact force and the real contact area was obtained, as well as the effects of elastic-plastic deformation on the contact of joint interfaces. The result showed that the contact force increased nearly linearly with the real contact area. The contact force decreased due to the increase of fractal roughness parameter G with the same contact area, but complicatedly varies with the fractal dimension D. The share of elastic-plastic contact area decreased with the increase of real contact area, increased with the increase of G, and complicatedly varies with D. The share of elastic-plastic was large enough and can not be ignored. It decreased with the increase of D. When the elastic-plastic deformation was overlooked, the contact fore was slightly larger than the results involved the elastic-plastic deformation. The error percentage lied within the range 5%-60%, which decreased with the increase of D.
  Number of references:12
  Main heading:Elastic deformation
  Controlled terms:  Computer simulation  -  Elastoplasticity  -  Fractal dimension
  Uncontrolled terms:  Asperities  -  Elastic-plastic deformation  -  Fractal model  -  Joint interfaces  -  Simulation
  Classification code:421 Strength of Building Materials; Mechanical Properties  -  723.5 Computer Applications  -  818 Rubber and Elastomers  -  921 Mathematics
  DOI:10.6041/j.issn.1000-1298.2013.01.046
  Database:Compendex

49. Accession number:20130616000197
  Title:NIR spectroscopy analysis of main parameters in red wine fermentation
  Authors:Zhang, Shuming1 ; Yang, Yang1 ; Liang, Xuejun2 ; Li, Jingming1 ; Ni, Yuanying1  
  Author affiliation:1  College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
                 2  Huailai Chateau Dragon Seal Wines Co. Ltd., Beijing 100143, China
  Corresponding author:Ni, Y. (niyuany@163.com) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:44
  Issue:1
  Issue date:January 2013
  Publication year:2013
  Pages:152-156
  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 glucose, fructose, ethanol and glycerol were predicted by using NIR spectroscopy and multivariate calibration methods. And the reference values were analyzed by HPLC to evaluate four components above. The principle component analysis regression (PCR) and partial least squares regression (PLSR) were compared. The correlation coefficient of calibration (R2), the root mean square error of calibration (RMSEC) and the root mean square error of prediction (RMSEP) were used to evaluate the models. Results from the application of PCR and PLSR were presented, showing there were no significant differences between PCR and PLSR to predict glucose, fructose and ethanol. While for the glycerol, it was better to use the PLSR. PLSR almost always required fewer latent variables than PCR, but this did not appear to influence predictive ability.
  Number of references:12
  Main heading:Principal component analysis
  Controlled terms:  Calibration  -  Ethanol  -  Fermentation  -  Fructose  -  Glucose  -  Glycerol  -  Infrared devices  -  Mean square error  -  Near infrared spectroscopy  -  Regression analysis
  Uncontrolled terms:  Correlation coefficient  -  Latent variable  -  Main parameters  -  Multivariate calibration methods  -  NIR spectroscopy  -  Nondestructive detection  -  Partial least squares regression  -  Predictive abilities  -  Principle component analysis  -  Red wine   -  Reference values  -  Root mean square error of calibrations  -  Root-mean-square error of predictions
  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  -  922.2 Mathematical Statistics  -  802.2 Chemical Reactions  -  741.3 Optical Devices and Systems  -  804.1 Organic Compounds
  DOI:10.6041/j.issn.1000-1298.2013.01.029
  Database:Compendex