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2011年第42卷第1期共收录46篇
1. Accession number: 20111213783702
 Title: Design and experiment on longitudinal axial conical cylinder threshing unit
Authors: Dai, Fei1 ; Gao, Aimin1 ; Sun, Wei1 ; Zhang, Fengwei1 ; Wei, Hongan1 ; Han, Zhengsheng1
Author affiliation: 1 College of Engineering, Gansu Agricultural University, Lanzhou 730070, China
 Corresponding author:Han, Z. (hanzhengsheng@gsau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:74-78
 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 lower power consumption, speed up the axial conveying of materials in threshing cylinder and improve the efficiency of machine cleaning of wheat breeding plot seed combine harvester, a longitudinal axial conical cylinder threshing unit with conical short-rasp-bar tooth structure was designed. The experimental results showed that the new device could speed up the conveying of materials in threshing cylinder and lower power consumption while threshing wheat, and the amount of wheat seed residued in the shell internal was little and there was no need to do manual clearing. The threshing unit can be applied to half-feeding breeding plot wheat seed combine harvester with cyclone air cleaning devices.
 Number of references:14
 Main heading:Combines
Controlled terms:Agriculture  -  Air cleaners  -  Axial flow  -  Cylinders (shapes)  -  Design  -  Experiments  -  Harvesters  -  Seed  -  Storms
Uncontrolled terms:Air cleaning  -  Combine harvesters  -  Conical cylinder  -  Conical cylinders  -  Lower-power consumption  -  New devices  -  Short-rasp-bar tooth  -  Speed-ups  -  Threshing unit  -  Threshing units   -  Tooth structure  -  Wheat breeding  -  Wheat seeds
Classification code:901.3 Engineering Research  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  651.2 Wind Tunnels  -  631.1 Fluid Flow, General  -  443.3 Precipitation  -  408.2 Structural Members and Shapes  -  408 Structural Design
 Database:Compendex
   
2.Accession number:20111213783725
Title:Improved BP-neural network of the particle swarm optimization in the research on engine fault diagnosis
 Authors:Zhang, Jianjun1 ; Zhang, Li2 ; Mu, Haifang2 ; Liu, Zhengyu2 ; Xu, Juan1
Author affiliation: 1  Engineering Research Center of Safety Critical Industrial Measurement and Control Technology, Ministry of Education, Hefei 230009, China
2  School of Machinery and Automobile Engineering, Hefei University of Technology, Hefei 230009, China
 Corresponding author:Zhang, L. (77zhangli@hfut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:198-203
 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 the process of using BP-neural network in fault diagnosis, there will be ″dimension tragedy″ as the input variable increases, which causes the lower training effective. Besides, traditional BP algorithm tends to fall in local optimization. The reduction based on the rough set (RS) is the conventional ″reduce dimension″ method, but it is NP-hard problem, whose computing will gradually augment as the information increases. Therefore, a heuristic algorithm was used for attribute reduction based on the importance of attribute value to reduce attribute, a fault diagnosis approach was formed combining the fuzzy information system knowledge method with BP-neural network of the particle swarm optimization (PSO) algorithm to diagnose the fault of engine. The experiments show that comparing with the conventional method, it can not only require fault diagnosis rule, but also reduce net input dimensions effectively, avoid falling in local optimization and increase the efficiency of fault diagnosis.
 Number of references:7
 Main heading:Particle swarm optimization (PSO)
Controlled terms:Computational complexity  -  Heuristic algorithms  -  Heuristic methods  -  Neural networks  -  Rough set theory
Uncontrolled terms:Attribute reduction  -  Attribute values  -  BP algorithm  -  BP neural networks  -  Conventional methods  -  Fault diagnosis  -  Fuzzy information systems  -  Input variables  -  Local optimizations  -  Net inputs   -  NP-HARD problem  -  Particle swarm optimization algorithm  -  Rough set
Classification code:721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory  -  723 Computer Software, Data Handling and Applications  -  921 Mathematics  -  921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
 Database:Compendex
   
3.Accession number: 20111213783706
 Title:Research and application test of bamboo OSB flaker
 Authors:Fu, Wansi1 ; Shen, Yi2 ; Zhou, Jianbo1
Author affiliation: 1  Beijing Forestry Machinery Research Institute of the State Forestry Administration, Beijing 100029, China
          2  China Foma (Group) Co., Ltd., Zhenjiang 212016, China
 Corresponding author:Fu, W. (fuwansi@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 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:In view of the special structure of bamboo, bamboo OSB flaker was developed. Development concept, mechanical and hydraulic design were presented. Then bamboo OSB flaker was tested run. Bamboo flake processed by bamboo OSB flaker was pressed into bamboo OSB, and the main physical and mechanical properties were tested and researched. The results indicated that bamboo flake with high quality shape could be sliced, which made the even distribution of outer of bamboo in the bamboo flake. Moreover, the bamboo OSB flaker has the characteristics of high efficiency, minor impact vibration and etc. The tests show that the key performance indicators of bamboo OSB are higher than the standards of LY/T 1580-2000 (OSB/4). Therefore, the research and design of bamboo OSB flaker is reasonable and effective.
 Number of references:10
 Main heading:Bamboo
Controlled terms:Benchmarking  -  Design  -  Hydraulic equipment  -  Hydraulic machinery  -  Hydraulics  -  Mechanical properties  -  Research
Uncontrolled terms:High efficiency  -  High quality  -  Hydraulic designs  -  Impact vibration  -  Key performance indicators  -  Mechanical design  -  Physical and mechanical properties  -  Research and application  -  Special structure
Classification code: 913 Production Planning and Control; Manufacturing  -  912 Industrial Engineering and Management  -  901.3 Engineering Research  -  951 Materials Science  -  821.4 Agricultural Products  -  632.1 Hydraulics  -  408 Structural Design  -  632.2 Hydraulic Equipment and Machinery
 Database:Compendex
   
4.Accession number: 20111213783697
 Title:Simplified method for soil water distribution and infiltrability estimations
 Authors:Mao, Lili1 ; Lei, Tingwu1
Author affiliation: 1  College of Hydraulic and Civil Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Lei, T. (ddragon@public3.bta.net.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:49-53 58
 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 simplified mathematic model was formed to estimate the soil infiltrability from the total water supply, the initial and saturated soil water content and the linear assumption of the soil water distribution based on the study of modified Green-Ampt model and the mass/water balance principle. The soil infiltrability estimated with this new simplified method is very close to the values calculated with the other methods. Comparisons were made between the predicted and measured soil water distribution. The average relative error was 4.18% which verified that the predicted one was very close to the measured values. The results showed that the newly suggested model could predict the soil water distribution along the horizontal soil column as a function of time very accurately. This new model is readily applicable to the related studies and applications. It has great importance for the study of hydrologic circulation studies.
 Number of references:14
 Main heading:Geologic models
Controlled terms:Seepage  -  Soil mechanics  -  Soil moisture  -  Water content  -  Water supply  -  Water supply systems
Uncontrolled terms:Average relative error  -  Balance principle  -  Function of time  -  Green-Ampt infiltration  -  Green-Ampt model  -  Horizontal soil column  -  Mathematic model  -  Modified model  -  New model  -  Saturated soils   -  Simplified method  -  Soil column  -  Soil water content  -  Soil-water distribution
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways  -  441 Dams and Reservoirs; Hydro Development  -  444 Water Resources  -  446.1 Water Supply Systems  -  481.1 Geology  -  483.1 Soils and Soil Mechanics
 Database:Compendex
   
5.Accession number: 20111213783687
 Title:Rotary unit-block diesel particulate filter regeneration with microwave
 Authors:Gong, Jinke1 ; Yu, Mingguo1 ; Wang, Shuhui1 ; Long, Gang1 ; Fu, Jun1 ; Yu, Xuan1
Author affiliation: 1  College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
 Corresponding author:Gong, J. (gongjinke@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:1-7
 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 new rotary unit-block diesel particulate filter (DPF) was developed. There were several unit blocks with fan-shaped cross-section in the filter. These blocks were arranged in a circle and axial rotation during regeneration with microwave. The mechanism of the rotary unit-block DPF on the filtration and regeneration were analyzed and the filtration efficiency, the pressure drop characteristic were compared with the traditional overall body filter. The experimental study shows that rotary unit-block DPF is a better solution to continuous regeneration and has better performance. It is able to break the power restriction when used for vehicle.
 Number of references:15
 Main heading:Microwave filters
 Controlled terms:Air filters  -  Fuel filters  -  Microwaves  -  Pressure drop
Uncontrolled terms:Diesel  -  Microwave regeneration  -  Particulate filter  -  Pressure drop characteristic  -  Unit-block
Classification code:522 Gas Fuels  -  523 Liquid Fuels  -  703.2 Electric Filters  -  711 Electromagnetic Waves  -  802.1 Chemical Plants and Equipment  -  931.1 Mechanics
 Database:Compendex
   
6.Accession number: 20111213783708
 Title:Cost analysis of crop residue supplies
 Authors:Liu, Huacai1, 2 ; Yin, Xiuli1 ; Wu, Chuangzhi1
Author affiliation: 1  Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, China
2  Graduate University of Chinese Academy of Sciences, Beijing 100049, China
 Corresponding author:Yin, X. (xlyin@ms.giec.ac.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 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:Supply cost of crop residues for power plants was analysed. The supply chain includes five sub-processes, i.e. field collection, transportation, handling, pretreatment and storage. Five supply patterns were set up based on the differences in sub-processes, including bulk material pattern, centralized-storage chopping pattern, distributed-storage chopping pattern, baling pattern and pelleting pattern. The results show that, under specific conditions, the cost of the pelleting pattern is always the highest due to its high pelleting cost, followed by the baling pattern, the distributed-storage chopping pattern, and the centralized-storage chopping pattern in sequence. The bulk material pattern takes priority over the other three patterns when transportation distance is smaller than 69 km, 28 km and 16 km respectively. The baling pattern needs improving since the cost reduction in transportation process can not effectively offset the cost increase in baling and handling processes. For all patterns except pelleting, purchase cost accounted for the largest proportion, followed by transportation cost and field collection cost.
 Number of references:18
 Main heading:Cost benefit analysis
Controlled terms:Agricultural wastes  -  Cost accounting  -  Cost reduction  -  Crops  -  Materials handling equipment  -  Pelletizing  -  Storage (materials)  -  Supply chains  -  Transportation
Uncontrolled terms:Bulk materials  -  Cost analysis  -  Cost-increases  -  Crop residue  -  Handling process  -  Pre-Treatment  -  Purchase cost  -  Supply costs  -  Supply option  -  Transportation cost   -  Transportation distance  -  Transportation process
Classification code:913 Production Planning and Control; Manufacturing  -  912.2 Management  -  912 Industrial Engineering and Management  -  911 Cost and Value Engineering; Industrial Economics  -  821.5 Agricultural Wastes  -  821.4 Agricultural Products  -  802.3 Chemical Operations  -  694.4 Storage  -  691.1 Materials Handling Equipment  -  434 Waterway Transportation  -  433 Railroad Transportation  -  432 Highway Transportation  -  431 Air Transportation
 Database:Compendex
   
7.Accession number: 20111213783704
 Title:Design and CFD simulation of quad-pass rotary drum dryer-separator
Authors:Ning, Guopeng1 ; Wang, Decheng1 ; Wang, Guanghui1 ; Luo, Xiaoyan1 ; Li, Qiang1
Author affiliation: 1  College of Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Wang, D. (wdc@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:84-89 133
 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 sake of achieving uniform drying and separation of alfalfa leaves and stems in one process, a quad-pass rotary drum dryer-separator was designed, which mainly comprised the pre-drying, quick-drying, tempering and separating zones. The air flow in the dryer-separator was simulated by using CFD method with applying the standard k-Ε model, and the effect of different opening areas of the adjusting gate on the velocity in the separating chamber was analyzed emphatically. It was found that the desired velocity for leaf-stem separation in the separating chamber was gained, when the opening area of the adjusting gate was (150 × 150)~(200 × 150) mm2.
 Number of references:24
 Main heading:Computer simulation
 Controlled terms:Design  -  Dryers (equipment)  -  Drying
Uncontrolled terms:Air flow  -  Alfalfa  -  CFD method  -  CFD simulations  -  Leaf-stem separation  -  Numerical simulation  -  Opening areas  -  Pre-drying  -  Rotary drum  -  Separating chamber
Classification code:408 Structural Design  -  642.1 Process Heating  -  723.5 Computer Applications  -  802.1 Chemical Plants and Equipment
 Database:Compendex
   
8.Accession number: 20111213783709
 Title:Design and experiments of a down-flow tube reactor for the pyrolysis of biomass
 Authors:Cui, Xibin1 ; Li, Zhihe1 ; Li, Yongjun1 ; Yi, Weiming1 ; Bai, Xueyuan1
Author affiliation: 1  School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
 Corresponding author:Bai, X. (baixy@stdu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:113-116
 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 investigate the effects of reaction temperature and reaction distance on the pyrolysis volatilization characteristics of biomass in a down-flow tube reactor, a ceramic ball heated down-flow tube reactor was designed and fabricated, and biomass pyrolysis experiments were conducted in the reactor. The experimental apparatus could control the reaction temperature precisely, feed the biomass and heat carrier evenly and continuously. Pulverized corn stalk powder was used as the feed stock. Reaction temperatures were 450°C, 500°C and 550°C. The falling distances, which was the indirect measure of the residence time, were 150 mm, 550 mm, 850 mm and 1150 mm. Ash tracer method was used to calculate the volatilized fractions of the pyrolyzed biomass at different experimental conditions. The experimental results showed that the volatilized fraction of corn stalk powder increased nonlinearly with the increase of reaction temperature and residence time.
 Number of references:12
 Main heading:Biomass
 Controlled terms:Design  -  Experiments  -  Pyrolysis  -  Tubes (components)
Uncontrolled terms:Ash tracers  -  Bio-mass energy  -  Biomass pyrolysis  -  Ceramic balls  -  Corn stalk  -  Down-flow tube  -  Experimental apparatus  -  Experimental conditions  -  Flow tube reactor  -  Heat carriers   -  Indirect measure  -  Reaction distance  -  Reaction temperature  -  Residence time  -  Volatilization
Classification code:408 Structural Design  -  525.1 Energy Resources and Renewable Energy Issues  -  616.1 Heat Exchange Equipment and Components  -  802.2 Chemical Reactions  -  901.3 Engineering Research
 Database:Compendex
   
9.Accession number: 20111213783690
 Title:Nonlinear dynamic characteristics study on combustion process of natural gas engine
 Authors:Yang, Liping1 ; Wang, Liyuan2 ; Ma, Xiuzhen1 ; Li, Jun3
Author affiliation: 1  College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China
2  College of Sciences, Harbin Engineering University, Harbin 150001, China
3  College of Automobile Engineering, Jilin University, Changchun 130025, China
 Corresponding author:Yang, L. (yangliping302@tom.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:16-21
 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:Combustion process of supercharged inter-cooled natural gas engine was studied using nonlinear dynamic data analysis technology under the conditions of equivalence ratio (φ) from 1.00 to lean burn limit. Results showed that motion trajectories of combustion system in 2-D reconstructed state space fell into a finite range at different conditions, there were complex, twist and wrap geometric structures in reconstructed state space. Correlation dimension (D) of attractors could reach saturation value after embedding dimension m was greater than a certain value when engine worked at both conditions of equivalence ratio mixture and lean burn limit, at the same time the values were fractional, with the decrease of mixture concentration, cycle-to-cycle combustion variations increased, D increased, the D of attractors were 1.27, 1.33, 1.58 and 1.87, Largest Lyapunov Exponent (LLE) were 0.0086, 0.011, 0.013 and 0.0157 respectively at the conditions of equivalence ratio φ=1.00, 0.77, 0.70 and 0.63, therefore the combustion system of natural gas engine was a low-dimension chaos system.
 Number of references:10
 Main heading:Gas engines
Controlled terms:Chaotic systems  -  Combustion  -  Data reduction  -  Dynamic analysis  -  Dynamics  -  Engines  -  Fuel systems  -  Gases  -  Lyapunov methods  -  Natural gas
Uncontrolled terms:Chaos  -  Chaos systems  -  Combustion pro-cess  -  Combustion systems  -  Correlation dimensions  -  Embedding dimensions  -  Equivalence ratios  -  Geometric structure  -  Intercooled  -  Largest Lyapunov exponent   -  Lean burn  -  Mixture concentration  -  Motion trajectories  -  Nonlinear dynamic characteristics  -  Nonlinear dynamics  -  Reconstructed state space  -  Saturation values
Classification code:961 Systems Science  -  931 Classical Physics; Quantum Theory; Relativity  -  921 Mathematics  -  723.2 Data Processing and Image Processing  -  612.3 Gas Turbines and Engines  -  612 Engines  -  522 Gas Fuels  -  521.1 Fuel Combustion  -  422.2 Strength of Building Materials : Test Methods
 Database:Compendex
   
10.Accession number: 20111213783720
 Title:Parameterized geometric modeling of cucumber leaf based on data constrains
 Authors:Miao, Teng1 ; Zhao, Chunjiang2 ; Guo, Xinyu2 ; Lu, Shenglian2 ; Wen, Weiliang2
Author affiliation: 1  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
2   National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
 Corresponding author:Zhao, C. (zhaocj@nercita.org.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:171-176
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A method for parameterized geometric modeling of cucumber leaf based on data constrains was presented. Firstly, the data of leaf was collected and measured, the statistics law was analyzed. Secondly, vein distribution and morphological characteristic parameters of two types of leaf margin were refined based on the law, which constrained the overall shape of leaves and described the details of leaf margin in the partition. According to the parameter values, the 3-D coordinates of contour feature points were calculated, and the 3-D grid was generated by Silhouette-axis skeleton modeling method. Finally, texture mapping was used for increasing the realism. The experimental results showed that the method could construct the 3-D model of cucumber leaf quickly and flexibly, and with good realism effect.
 Number of references:13
 Main heading:Three dimensional
 Controlled terms:Geometry  -  Parameterization
Uncontrolled terms:3D models  -  Contour features  -  Cucumber leaf  -  Data constrains  -  Geometric modeling  -  Interactive design  -  Modeling method  -  Morphological characteristic  -  Parameter values  -  Parameterized   -  Texture mapping
 Classification code:902.1 Engineering Graphics  -  921 Mathematics
 Database:Compendex
   
11.Accession number: 20111213783691
Title:Numerical-experimental investigation of injection characteristics of high pressure common rail injector
 Authors:Su, Haifeng1, 2 ; Zhang, Youtong1 ; Wang, Shangyong1 ; Sun, Shuai1
Author affiliation: 1  School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2  Department of Machinery and Electronics, Shijiazhuang Vocational Technology Institute, Shijiazhuang 050081, China
 Corresponding author:Su, H. (suhf123@sina.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:22-26 30
 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 an integrated numerical-experimental approach, the injection characteristics of a production high pressure common rail solenoid injector were investigated on kinds of control parameters include rail pressure and energizing time. The characteristics of injection quality, injection rate, needle opening and closure delays, injection temporal length were summarized via experiment carried out on a test bench. A model of high pressure common rail injection system based on AMESim was used to calculate simulation results, compare and approve the experimental injection data. The injector hydraulic process and lift process of needle were simulated and analyzed. The mechanism and rules of injection characteristics depending on rail pressure and energizing time were summarized.
 Number of references:7
 Main heading:Diesel engines
 Controlled terms:Computer simulation  -  Jet pumps  -  Needles
Uncontrolled terms:Energizing time  -  High pressure common rail  -  Injection characteristics  -  Injector  -  Rail pressure
Classification code:612.2 Diesel Engines  -  618.2 Pumps  -  723.5 Computer Applications  -  819.6 Textile Mills, Machinery and Equipment
 Database:Compendex
   
12.Accession number: 20111213783724
 Title:Cow mastitis detection based on electrical parameters and neural networks
 Authors:Cui, Chuanjin1 ; Gu, Shaopeng2 ; Zuo, Yueming1
Author affiliation: 1  College of Engineering, Shanxi Agricultural University, Taigu 030801, China
2  College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China
 Corresponding author:Zuo, Y. (ZYueming88@yahoo.com.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:193-197
 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 temperatures, electrical conductivities, capacitances and somatic cell counts of cow fresh milk were measured accurately, and a four-layer BP neural networks regression model was established. The temperatures, electrical conductivities and capacitances were used as the model input data, and somatic cell was counted as output data. The model results were compared with those of the model without the capacitances parameters. It showed that the detection accuracy had been significantly improved with the capacitances parameters, the correct cow mastitis detection rate for validation sample set was 100%.
 Number of references:12
 Main heading:Neural networks
Controlled terms:Capacitance  -  Cells  -  Electric conductivity  -  Network layers  -  Regression analysis
Uncontrolled terms:BP neural networks  -  Cows  -  Detection  -  Detection accuracy  -  Detection rates  -  Electrical conductivity  -  Electrical parameter  -  Electrical parameters  -  Mastitis  -  Model inputs   -  Model results  -  Output data  -  Regression model  -  Sample sets  -  Somatic cell count  -  Somatic cells
Classification code:461.1 Biomedical Engineering  -  461.2 Biological Materials and Tissue Engineering  -  701.1 Electricity: Basic Concepts and Phenomena  -  723 Computer Software, Data Handling and Applications  -  723.4 Artificial Intelligence  -  922.2 Mathematical Statistics
 Database:Compendex
   
13.Accession number: 20111213783710
 Title:Numerical study on pressure field of center air distribution biomass gasifier
 Authors:Sun, Hongyu1 ; Dong, Yuping1
Author affiliation: 1  Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Ji'nan 250061, China
 Corresponding author:Dong, Y. (dongyp@sdu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:117-121
 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:Different air distribution craft should impact the temperature of biomass gasifier in the gasification process. After temperature compared test, the bed temperature in the condition of double-layer air distribution is lower than the center tube air distribution. Using the fluid analysis software Fluent to simulate the pressure field under those two crafts, the result displayed that the pressure of pyrolysis layer of biomass gasifier bed in center tube air distribution was reduced, and the pressure field became more regular. The conclusion is the volatile in pyrolysis would be more precipitated if the pressure of this field was prompted based on the combustion theory, and the reaction rate and temperature would speed up and improve. That explained the result of gasification test by the perspective of bed pressure. Finally the accuracy of simulation result was tested by the method of error analysis.
 Number of references:14
 Main heading:Gasification
Controlled terms:Air  -  Biomass  -  Computer simulation  -  Error analysis  -  Pyrolysis  -  Reaction rates
Uncontrolled terms:Air distribution  -  Bed temperature  -  Biomass gasifier  -  Combustion theory  -  Double layers  -  Fluid analysis  -  Gasification pressure  -  Gasification process  -  Numerical simulation  -  Numerical studies   -  Pressure field  -  Simulation result  -  Software FLUENT  -  Speed-ups
Classification code:525.1 Energy Resources and Renewable Energy Issues  -  723.5 Computer Applications  -  802.2 Chemical Reactions  -  802.3 Chemical Operations  -  804 Chemical Products Generally  -  921.6 Numerical Methods
 Database:Compendex
   
14.Accession number: 20111213783718
 Title:Fast segmentation of high-resolution color images of cotton foreign fibers
 Authors:Zhang, Xin1 ; Li, Daoliang2 ; Yang, Wenzhu2 ; Wang, Jinxing1 ; Liu, Shuangxi1
Author affiliation: 1  College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
2  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Wang, J. (jinxingw@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:159-164 192
 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 fast segmentation method for high-resolution color images of cotton foreign fibers was proposed. It detected the edge of color image by using edge detection method based on improved mathematical morphology. A color image was converted into a gradient map in the first step, and the best threshold of the gradient map was chosen by selecting the best experience value iteratively. The experimental results indicated that the proposed method could segment the high-resolution color images of cotton foreign fibers directly and precisely, and the speed of image processing increased more than two times than the traditional methods.
 Number of references:9
 Main heading:Image segmentation
Controlled terms:Color  -  Cotton  -  Edge detection  -  Fibers  -  Mathematical morphology  -  Morphology  -  Spinning (fibers)
Uncontrolled terms:Color images  -  Edge detection methods  -  Foreign fiber  -  Gradient map  -  High-resolution  -  Segmentation methods
Classification code:951 Materials Science  -  921 Mathematics  -  819.3 Fiber Chemistry and Processing  -  819.1 Natural Fibers  -  817 Plastics and Other Polymers: Products and Applications  -  812 Ceramics, Refractories and Glass  -  741.1 Light/Optics
 Database:Compendex
   
15.Accession number: 20111213783703
 Title:Virtual test of combine harvester based on visual simulation
 Authors:Yang, Fangfei1 ; Yan, Chuliang1
Author affiliation: 1  State Key Laboratory of Soil-Plant-Machinery System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
 Corresponding author:Yan, C. (yancl@sina.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:79-83
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Driving force, driving resistance and operating resistance of wheeled combine harvester during operating process was analyzed, tire model, road model as well as force model was built, numerical simulation of motion for whole wheeled combine harvester was finished and attitude curve was obtained. Lifelike virtual scene including terrestrial surface environment, such as farm field, roads, trees, grassland, etc. was created. Visual model of wheeled combine harvester after reasonable simplified was imported to visual simulation driving platform, and interacting control of whole machine attitude in visual scene was put forward, which made visual simulation more realistic. This study laid the foundation of building interacting control integrated virtual testing platform for combine harvester.
 Number of references:11
 Main heading:Computer simulation
 Controlled terms:Harvesters  -  Mathematical models  -  Roads and streets
Uncontrolled terms:Combine harvesters  -  Driving forces  -  Driving platform  -  Force model  -  Numerical simulation  -  Operating process  -  Road models  -  Terrestrial surface  -  Tire models  -  Virtual scenes   -  Virtual test  -  Virtual testing  -  Virtual tests  -  Visual model  -  Visual scene  -  Visual simulation  -  Wheeled combine harvester  -  Whole machine
Classification code:406.2 Roads and Streets  -  723.5 Computer Applications  -  821.1 Agricultural Machinery and Equipment  -  921 Mathematics
 Database:Compendex
   
16.Accession number: 20111213783688
 Title:Experiment on the smoke and NOx emissions of modified biodiesel
 Authors:Xu, Guangju1 ; Wang, Zhong1 ; Mao, Gongping1 ; Wang, Xiaozhe1
Author affiliation: 1  School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
 Corresponding author:Xu, G. (xuguangju0535@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:8-11
 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:Because of the poor oxidation stability and the high NOx emissions, biodiesel fuel was redesigned by adding anti-oxidants. The oxidation stability and viscosity of the biodiesel have been measured and analyzed. The engine experiment was conducted and it was fueled by biodiesel and BHA/biodiesel, NOx emission and smoke were measured. The mechanism of anti-oxidants to decrease the smoke, NOx emission was discussed. The results showed that BHA additive was a high effective antioxidant of biodiesel, the viscosity of biodiesel was decreased slightly; and the emission smoke and NOx was decreased significantly, especially at the high load condition. Anti-oxidants can restrain the high-temperature dissociation of long-chain fatty acid molecules during the combustion process, and it can promote the quenching effects of free radical. Also, it can change the ″trade-off″ tradition relationship between smoke and NOx emissions.
 Number of references:11
 Main heading:Biodiesel
Controlled terms:Experiments  -  Fatty acids  -  Free radicals  -  Oxidants  -  Oxidation  -  Smoke  -  Synthetic fuels  -  Viscometers  -  Viscosity
Uncontrolled terms:Anti-oxidants  -  Bio-diesel fuel  -  Combustion pro-cess  -  Emission  -  Fuel quality  -  High load  -  High temperature  -  Long-chain fatty acids  -  Oxidation stability  -  Quenching effect
Classification code:901.3 Engineering Research  -  804.1 Organic Compounds  -  804 Chemical Products Generally  -  943.3 Special Purpose Instruments  -  803 Chemical Agents and Basic Industrial Chemicals  -  631.1 Fluid Flow, General  -  523 Liquid Fuels  -  802.2 Chemical Reactions
 Database:Compendex
   
17.Accession number: 20111213783707
 Title:Design and experiment on dairy cow precise feeding equipment based on MCU
 Authors:Li, Jicheng1 ; Gao, Zhenjiang1 ; Xiao, Hongwei1 ; Meng, Hewei2 ; Kan, Za2
Author affiliation: 1  College of Engineering, China Agricultural University, Beijing 100083, China
2  College of Mechanical and Electronical Engineering, Shihezi University, Shihezi 832000, China
 Corresponding author:Gao, Z. (zjgao@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:101-105
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Based on the technology of MCU, one kind of dairy cow precise feeding equipment was designed. This kind of equipment used computer as information management platform, MCU as data processing and control platform, and used the RFID technology to identify dairy cows. The working parameters of the equipment were established and the feeding accuracy of the equipment was verified. By using the equipment, one-month feeding experiment in the dairy cow farm was conducted. The results showed that the milk production per day was increased by 3.9 kg, and the average fat content of milk was 3.74 g/(100 g), the average protein content of milk was 2.98 g/(100 g).
 Number of references:5
 Main heading:Equipment
 Controlled terms:Dairies  -  Data handling  -  Feeding  -  Information management
Uncontrolled terms:Control platform  -  Cow  -  Dairy cow  -  Fat contents  -  Feeding equipment  -  Feeding experiments  -  MCU  -  Milk performance  -  Milk production  -  Precise feeding   -  Protein contents  -  RFID Technology  -  Working parameters
Classification code:402.1 Industrial and Agricultural Buildings  -  691.2 Materials Handling Methods  -  723.2 Data Processing and Image Processing  -  901 Engineering Profession  -  903.2 Information Dissemination
 Database:Compendex
   
18.Accession number: 20111213783732
Title:Dimensions of surface structures of slippery zone in nepenthes pitchers and bionic design of locust trapping plate
 Authors:Wang, Lixin1 ; Zhou, Qiang1 ; Liu, Qihang1
Author affiliation: 1  College of Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Zhou, Q. (zq@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:233-235
 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 slippery zone of inner pitchers in Nepenthes bears specialized structures to serve the functions of trapping insects. The surface microstructures of slippery zone and its geometrical dimensions were acquired with scanning electron microscope (SEM) and scanning white-light interferometer (SWLI). The slippery zone consists of plenty of downward-directed lunate cells, as well as relatively dense and irregular wax crystals. Based on the microstructures and the geometrical dimensions, surface structures of slippery trapping plates used in controlling plague locust was designed with 3DSMAX software, and this design provided theoretical foundations for manufacturing slippery trapping plates.
 Number of references:9
 Main heading:Plates (structural components)
Controlled terms:Bionics  -  Design  -  Microstructure  -  Scanning electron microscopy  -  Surface structure
Uncontrolled terms:Bionic design  -  Geometrical dimensions  -  Nepenthes  -  Scanning electron microscopes  -  Slippery trapping plate  -  Slippery zone  -  Surface microstructures  -  Theoretical foundations  -  Wax crystals  -  White-light interferometer
Classification code:408 Structural Design  -  408.2 Structural Members and Shapes  -  731.1 Control Systems  -  741.1 Light/Optics  -  933 Solid State Physics  -  951 Materials Science
 Database:Compendex
   
19.Accession number: 20111213783692
Title:Multi optimization simulation design of a high pressure common rail injector based on MOSA algorithm
 Authors:Xiong, Qinghui1 ; Zhang, Youtong1
Author affiliation: 1  School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
 Corresponding author:Xiong, Q. (xiong.qinghui@gmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:27-30
 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 precise model for the common rail fuel injector based on the Matlab/Simulink was built. Using the multi objective simulated annealing algorithm as the search strategy, the key injector parameters were optimized. The aim function of the multi objective optimization was the opening delay and the closing delay. The results showed that the delay of the opening was 0.25 ms which reduced by 16.7%; while the delay of the closing was 0.78 ms, which reduced by 15.2%.
 Number of references:10
 Main heading:Simulated annealing
 Controlled terms:Algorithms  -  Jet pumps  -  Multiobjective optimization
Uncontrolled terms:Aim function  -  Common rail  -  Fuel injectors  -  High pressure common rail  -  Injector  -  Injector parameters  -  MATLAB /simulink  -  Multi objective  -  Multi-Optimization  -  Search strategies   -  Simulated annealing algorithms
Classification code:618.2 Pumps  -  723 Computer Software, Data Handling and Applications  -  921 Mathematics  -  921.5 Optimization Techniques
 Database:Compendex
   
20.Accession number: 20111213783730
 Title:Effects of cutting speed on surface integrity of Inconel 718
 Authors:Cao, Chengming1 ; Liu, Zhanqiang1 ; Yang, Qibiao1
Author affiliation: 1  Key Laboratory of High Efficiency and Clean Mechanical Manufacturing, Ministry of Education, Shandong University, Ji'nan 250061, China
 Corresponding author:Liu, Z. (melius@sdu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:223-227
 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 one kind of high strength and thermal resistant nickel-based alloys, Inconel 718 has been used extensively in aerospace industries. To satisfy the instant requirements of higher material removal rate and good surface integrity from engineering practice, high speed machining of Inconel 718 is an inevitable trend. The influences of cutting speed on surface integrity were investigated through the experimental study with high-speed milling Inconel 718 using Sialon ceramic tool. The results showed that higher cutting speed could exploit to give excellent surface integrity. The best surface integrity was obtained in the investigation at the highest cutting speed of 1400 m/min in the applied cutting speed range.
 Number of references:14
 Main heading:Speed
Controlled terms:Aerospace industry  -  Heat resistance  -  High strength alloys  -  Milling (machining)  -  Nickel  -  Stripping (removal)  -  Surfaces
Uncontrolled terms:Cutting speed  -  Engineering practices  -  Experimental studies  -  High speed machining  -  High speed milling  -  High strength  -  Inconel-718  -  Material removal rate  -  Nickel based alloy  -  Sialon ceramics   -  Surface integrity
Classification code:931.2 Physical Properties of Gases, Liquids and Solids  -  931.1 Mechanics  -  811.2 Wood and Wood Products  -  658 Aerospace Engineering, General  -  655 Spacecraft  -  654 Rockets and Rocket Propulsion  -  653 Aircraft Engines  -  652 Aircraft and Avionics  -  604.2 Machining Operations  -  548.1 Nickel  -  531.1 Metallurgy
 Database:Compendex
   
21.Accession number: 20111213783694
 Title:Recovery of waste heat of gas engine heat pump
 Authors:Wang, Mingtao1 ; Yang, Zhao1 ; Chen, Yiguang1
Author affiliation: 1  School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
 Corresponding author:Yang, Z. (zhaoyang@tju.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:35-38
 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 methods of waste heat recovery from gas engine heat pump (GEHP) were analyzed theoretically. From the aspect of energy balance, the feasibility of the waste heat defrosting method was discussed, the results showed that the waste heat for defrosting was small, accounting for 6.5%~9.5% of the total waste heat, and the waste heat for refrigerant was less than 45% of the total waste heat, so the waste heat defrosting method was feasible. The waste heat can significantly improve the Cop and primary energy utilization rate of GEHP.
 Number of references:7
 Main heading:Waste heat utilization
Controlled terms:Defrosting  -  Energy conversion  -  Energy utilization  -  Gas engines  -  Heat pump systems  -  Pumps  -  Recovery  -  Waste heat
Uncontrolled terms:Defrost  -  Gas engine heat pump  -  Primary energy utilization rate  -  Waste heat recovery
Classification code:525 Energy Management and Conversion  -  531 Metallurgy and Metallography  -  612.3 Gas Turbines and Engines  -  618.2 Pumps  -  641.2 Heat Transfer  -  644.3 Refrigeration Equipment and Components
 Database:Compendex
   
22.Accession number: 20111213783722
 Title:Design and application of yield monitor system for corn ear
 Authors:Qi, Jiangtao1 ; Zhang, Shuhui1 ; Niu, Xutang1 ; Wang, Wei1 ; Xu, Yan1
Author affiliation: 1  Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
 Corresponding author:Zhang, S. (shzhang@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:181-185
 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 yield monitor system for corn ear was designed and applied in field. It is consisted of a monitor, a ground speed sensor, a yield sensor, a DGPS, a header sensor, an elevator speed sensor and the guiding device. The data of grain-ear ratio and moisture content of corn grains were sampled before harvest. The header sensor was used as a logic switch of the system while harvesting corn ears. All the corns were forced to impact the yield sensor at the same speed with the help of the guiding device. The monitor received signals coming from the yield sensor, the ground speed sensor, the elevator speed sensor and the DGPS worked out the yield in the plot and saved it in the file with extension of ″. vld″. The yield map would be drawn by means of the self-developed DCAS (data collecting and application system). This system was applied in field in the autumn of 2009. The data of the experiment showed that the average relative error of the yield monitor system was 18.11%.
 Number of references:20
 Main heading:Monitoring
Controlled terms:Agriculture  -  Elevators  -  Grain (agricultural product)  -  Sensors  -  Speed
Uncontrolled terms:Application systems  -  Average relative error  -  Corn ear  -  Corn grain  -  Data collecting  -  Design and application  -  Ground speed  -  Guiding device  -  In-field  -  Moisture contents   -  Precision agriculture  -  Received signals  -  Speed sensors  -  Yield monitor  -  Yield monitoring
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  -  931.1 Mechanics  -  821.4 Agricultural Products  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  801 Chemistry  -  692.2 Elevators
 Database:Compendex
   
23.Accession number: 20111213783689
Title:Combustion and cycle-by-cycle variation of pure hydrogen-fueled spark ignition engine at idle and lean conditions
Authors:Wang, Shuofeng1 ; Ji, Changwei1 ; Zhang, Bo1 ; Zhang, Jian1 ; Niu, Zhao1 ; Fan, Boyuan1
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 of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:12-15 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:Experimental study focusing on the combustion and cyclic variation characteristics of a pure hydrogen-fueled engine at idle and lean conditions was introduced. The experiment was carried out on a modified four-cylinder spark-ignition engine equipped with an electronic controlled hydrogen injection system. The test results showed that when excess air ratio was varied within 2.08 to 3.20, the engine original electronic control unit could maintain idle speed of the pure hydrogen-fueled engine at its target value (790 r/min) by automatic adjusting the spark timing and idle bypass valve opening. The engine cooling loss was decreased with the increase of excess air ratio. However, the cyclic variation in indicated mean effective pressure and combustion duration were slightly raised when the engine was gradually leaned out. When excess air ratio rose from 2.08 to 3.20, the engine fuel energy flow rate was reduced by about 15.4%.
 Number of references:9
 Main heading:Engine cylinders
Controlled terms:Bypass ratio  -  Electric sparks  -  Engines  -  Experiments  -  Hydrogen  -  Ignition  -  Remote control
Uncontrolled terms:Bypass valve  -  Combustion duration  -  Cycle by cycle variation  -  Cyclic variation  -  Cyclic variations  -  Electronic control units  -  Engine cooling  -  Engine fuels  -  Excess air ratios  -  Experimental studies   -  Hydrogen injection  -  Hydrogen-fueled engines  -  Idle  -  Idle speed  -  Indicated mean effective pressure  -  Lean condition  -  Spark ignition engines  -  Spark timing  -  Target values  -  Test results
Classification code:804 Chemical Products Generally  -  731.1 Control Systems  -  701.1 Electricity: Basic Concepts and Phenomena  -  901.3 Engineering Research  -  653.1 Aircraft Engines, General  -  612 Engines  -  521.1 Fuel Combustion  -  612.1.1 Internal Combustion Engine Components
 Database:Compendex
   
24.Accession number: 20111213783712
 Title:Mass transfer between materials and unsteady airflow from a Helmholtz type combustor
 Authors:Niu, Haixia1 ; Liu, Liu1 ; Zhao, Wenhe2 ; Liu, Xiangdong1
Author affiliation: 1  College of Engineering, China Agricultural University, Beijing 100083, China
2  Shandong Tianli Drying Equipment Inc., Ji'nan 250014, China
 Corresponding author:Liu, X. (xdliu@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:129-133
 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:Although pulse combustion drying would exhibit high rate of mass transfer when used in a drying process, there is no numerical research about the mass transfer between materials and unsteady flow generated by pulse combustor. The results of an investigation of the moisture diffusivity in refractory clay and the convection process of moisture between refractory clay and outflow was reported. A Helmholtz type pulse combustion was used to generate an oscillating airflow. The moisture diffusivity in refractory clay was determined by the simplified method of drying methods. The mass transfer coefficient between refractory clay and outflow was evaluated by the results of experiment and Fick's second law with reasonable initial conditions and boundary conditions. The effect of airflow oscillating frequency on mass transfer coefficient was investigated and the correlation was established.
 Number of references:11
 Main heading:Mass transfer
Controlled terms:Combustion  -  Combustors  -  Drying  -  Iron metallurgy  -  Moisture  -  Refractory materials
Uncontrolled terms:Convection process  -  Drying methods  -  Drying process  -  Fick's second law  -  Helmholtz  -  High rate  -  Initial conditions  -  Mass transfer coefficient  -  Moisture diffusivity  -  Numerical research   -  Oscillating airflow  -  Oscillating frequencies  -  Pulse combustion  -  Pulse combustors  -  Refractory clays  -  Simplified method
Classification code:812.2 Refractories  -  801.4 Physical Chemistry  -  642.1 Process Heating  -  641.3 Mass Transfer  -  545.1 Iron  -  521.2 Combustors  -  521.1 Fuel Combustion
 Database:Compendex
   
25.Accession number: 20111213783705
 Title:Design on seed melon pulp-excavated machine
 Authors:Huang, Xiaopeng1 ; Tong, Changhong2 ; Wan, Fangxin1
Author affiliation: 1  Engineering College, Gansu Agricultural University, Lanzhou 730070, China
2  Peili College of Engineering and Technology, Lanzhou City University, Lanzhou 730070, China
 Corresponding author:Huang, X. (hxpsword@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 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:Based on rectangle circulating chart method, a seed melon pulp-excavated machine was designed. Improved swinging cam was used for feeding melon mechanism, a 2-round pin and 4-grooved wheel mechanism were chosen to realize precise indexing motion of a plug melon saddle, and flat-bottom tappet disc cam mechanism with improved rod gear mechanism was used for lifting tool saddle. The orthogonal experiment was done and the optimum parameters of digging was discovered as follows: the type of digging tool is hemicycle, the speed of digging tool is 240 r/min and the installation angle of digging tool is 15°. Replicated tests showed the cleaning rate is more than 98%, grain seedless rate is more than 98%, loss rate is less than 2% and broken rate is less than 1%, respectively.
 Number of references:5
 Main heading:Machine design
 Controlled terms:Cams  -  Experiments  -  Geometry  -  Seed
Uncontrolled terms:Cleaning rate  -  Disc cam mechanism  -  Gear mechanisms  -  Installation angle  -  Loss rates  -  Optimum parameters  -  Orthogonal experiment  -  Precise indexing  -  Rectangle circulating chart method  -  Wheel mechanism
Classification code:601 Mechanical Design  -  601.3 Mechanisms  -  821.4 Agricultural Products  -  901.3 Engineering Research  -  921 Mathematics
 Database:Compendex
   
26.Accession number: 20111213783719
 Title:Complex target image of field jujube leaf segmentation based on integrated technology
 Authors:Dong, Jinyong1 ; Wang, Jianlun1 ; Li, Daoliang1 ; He, Jianlei1 ; Wang, Yongbin1
Author affiliation: 1  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Wang, J. (wangjianlun@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:165-170
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To segment the complex target image, an algorithm based on integrated technology was proposed. First, the image was preprocessed to find the target area and have the image enhanced. Second, the target area was segmented by threshold and Canny operator, some raw results were acquired. Finally, in order to get the precise and complete target image, the optimizing process of the algorithm was made with morphological methods and logical calculation. Experimental results of field jujube leaf image showed that this algorithm was feasible and effective. This algorithm had a great advantage in complex leaf image which contains overlap leaves and uneven gray scale. The clear, smooth, precise edge image could be obtained.
 Number of references:11
 Main heading:Image segmentation
 Controlled terms:Algorithms  -  Mathematical operators
Uncontrolled terms:Canny Operators  -  Field image  -  Jujube leaf  -  Morphological methods  -  Threshold segmentation
 Classification code:741.1 Light/Optics  -  921 Mathematics
 Database:Compendex
   
27.Accession number: 20111213783731
Title:Tribological properties of the micro-WEDM surface under dry friction and wear conditions
 Authors:Ding, Haijuan1, 2 ; Cui, Hai1 ; Zhang, Zhihang1 ; Guo, Libin1
Author affiliation: 1  College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
2  College of Mechanical Engineering, Jiamusi University, Jiamusi 154007, China
 Corresponding author:Ding, H. (dhj1000@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:228-232
 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 reciprocating sliding tribological behavior of the micro wire electrical discharge machining (micro-WEDM) surface was investigated under dry friction and wear conditions by using the ball-on-flat contact model with 0.6 mm amplitude. The influences of different loads and frequencies on the friction coefficient were analyzed and the wear mechanism was also studied. The results showed that the friction coefficient decreased with the load increasing because of the third body friction, friction coefficient decreased with the frequency increasing because the oxide film formed with temperature rising led to the decrease of shear strength of microtip contact surface. The wear-loss volume of the micro-WEDM surface increased with load and frequency increasing, and the wear scars appeared adhesion and oxidation wear mechanism.
 Number of references:8
 Main heading:Friction
Controlled terms:Electric discharge machining  -  Electric discharges  -  Oxide films  - Shear strength  -  Surface topography  -  Tribology  -  Wear of materials  -  Wire
Uncontrolled terms:Ball on flats  -  Contact models  -  Contact surface  -  Dry friction  -  Friction coefficient  -  Friction coefficients  -  Micro wire electrical discharge machining  -  Microtips  -  Oxidation wear  -  Reciprocating sliding   -  Temperature rising  -  Third body  -  Tribological behaviors  -  Tribological properties  -  Wear  -  Wear mechanisms  -  Wear scars
Classification code:931.2 Physical Properties of Gases, Liquids and Solids  -  931.1 Mechanics  -  712.1.2 Compound Semiconducting Materials  -  701.1 Electricity: Basic Concepts and Phenomena  -  535.2 Metal Forming  -  422 Strength of Building Materials; Test Equipment and Methods  -  421 Strength of Building Materials; Mechanical Properties
 Database:Compendex
   
28.Accession number: 20111213783728
 Title:Strength of unsymmetric single-lap adhesively bonded joints
 Authors:Li, Long1 ; Hu, Ping2 ; Liu, Lizhong2
Author affiliation: 1  College of Automobile Engineering, Jilin University, Changchun 130025, China
2  College of Automobile Engineering, Dalian University of Technology, Dalian 116024, China
 Corresponding author:Li, L. (llong702@yahoo.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:213-217
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to explore the strength of the structures with unsymmetric lap-joints, the adhesively bonded single-lap joints whose adherends were steel sheets, aluminum sheets and steel-aluminum were separately tested in tension loading which created shear across the bondline. The tests were conducted under different temperatures to provide the experimental tension loads for the three kinds of dissimilar lap-joints. According to the method which Wu Z J proposed, the equations of edge-loads were given based on GR's theory. The stress of adhesive was obtained through finite element analysis. In addition, the effects of the unsymmetric structure on the strength of joints were discussed.
 Number of references:12
 Main heading:Finite element method
Controlled terms:Adhesive joints  -  Aluminum  -  Metal analysis  -  Steel sheet  -  Stress analysis
Uncontrolled terms:Adherends  -  Adhesive bonding  -  Adhesively bonded joints  -  Finite element analysis  -  Single lap joints  -  Tension loading  -  Tension loads  -  Unsymmetric lap-joints
Classification code:921.6 Numerical Methods  -  818.5 Rubber Products  -  801 Chemistry  -  951 Materials Science  -  545.3 Steel  -  531 Metallurgy and Metallography  -  421 Strength of Building Materials; Mechanical Properties  -  541.1 Aluminum
 Database:Compendex
   
29.Accession number: 20111213783717
 Title:Identification of plant morphology wilt-induced by water stress with 3-D based image
Authors:Zhang, Huijuan1 ; Zhao, Yandong2 ; Sun, Yurui1 ; Wang, Congying1 ; Cai, Xiang1 ; Schulze Lammers, P.3
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
3   Department of Agricultural Engineering, University of Bonn, Bonn 53115, Germany
 Corresponding author:Zhao, Y. (yandongzh@bjfu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:154-158
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To identify the wilted plant morphology, based on the 3-D images obtained from a laser-scanner, four types of wilt-index were defined, including statistical index of wilt-induced leaf (SIWL), Gaussian curvature at the physical center of leave, projecting distance from leaf-tip or leaf-edge to a referenced plane being tangent at the physical center of leaf. For the experimental methodology, the wilted-leaf statuses were divided into five levels, which were used for verifying whether each defined index had monotone property from earlier to serious degree of wilt status. The experimental results demonstrated that the indices in terms of the projecting distance method could meet the requirement for this purpose. In particular, the index relating the leaf-edge to the referenced plane could provide more robust results.
 Number of references:12
 Main heading:Three dimensional
 Controlled terms:Image processing  -  Morphology
Uncontrolled terms:3-D image  -  Distance method  -  Experimental methodology  -  Gaussian curvatures  -  Monotone properties  -  Morphological identification  -  Plant morphology  -  Statistical indices  -  Water stress  -  Wilt-index
Classification code:741 Light, Optics and Optical Devices  -  902.1 Engineering Graphics  -  951 Materials Science
 Database:Compendex
   
30.Accession number: 20111213783711
Title:Collector area optimization of integrated solar and ground source heat pump system for heating biogas digester
Authors:Pei, Xiaomei1 ; Zhang, Di2 ; Shi, Huixian2 ; Zhu, Hongguang2 ; Lei, Yong2 ; Wang, Zhuo2
Author affiliation: 1  College of Mechanical Engineering, Tongji University, Shanghai 200092, China
2 Modern Agricultural Science and Engineering Institute, Tongji University, Shanghai 200092, China
 Corresponding author:Shi, H. (huixian_shi@mail.tongji.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:122-128
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To address the problem of heating biogas project and compensating the lost ground temperature of ground source heat pump system, the integrated solar and ground source heat pump system (ISGSHPS) was presented for heating biogas digester, and the economic and environmental performance of ISGSHPS with that of ground source heat pump and electricity heat membrane system were compared to obtain the optimal solar collector area. The results show that the optimal solar collector area is related to annual total running hours and electricity price. The most economic running period is from October to the next May; ground source heat pump system is more economical than ISGSHPS when electricity price is lower than 0.5 Yuan per kW · h; when the electricity price is between 0.5 and 1.0 Yuan per kW · h or higher than 1.0 Yuan per kW · h, the optimal solar collector area of ISGSHPS is 24 m2 and 32 m2 respectively. At present, the optimum collector area is 24 m2, under which total cost saving in 20 years is 10830 Yuan and 59244 Yuan, and carbon dioxide emissions could be reduced about 74 t and 266 t by comparison ISGSHPS with ground source heat pump and electricity heat membrane system. Therefore, this system has potential to develop.
 Number of references:18
 Main heading:Geothermal heat pumps
Controlled terms:Biogas  -  Carbon dioxide  -  Costs  -  Electricity  -  Environmental management  -  Global warming  -  Heating  -  Life cycle  -  Ocean structures  -  Optimization   -  Power quality  -  Pumps  -  Solar collectors  -  Solar heating
Uncontrolled terms:Area optimization  -  Biogas digesters  -  Carbon dioxide emissions  -  Economic and environmental performance  -  Electricity prices  -  Ground source heat pump  -  Ground source heat pump systems  -  Ground temperature  -  Life-cycle cost-saving method  -  Membrane system   -  Total costs
Classification code:921.5 Optimization Techniques  -  701.1 Electricity: Basic Concepts and Phenomena  -  702.3 Solar Cells  -  706.1.2 Electric Power Distribution  -  804.2 Inorganic Compounds  -  911 Cost and Value Engineering; Industrial Economics  -  913.1 Production Engineering  -  643.1 Space Heating  -  618.2 Pumps  -  522 Gas Fuels  -  472 Ocean Engineering  -  454.1 Environmental Engineering, General  -  451 Air Pollution  -  641.2 Heat Transfer
 Database:Compendex
   
31.Accession number: 20111213783714
 Title:Thin layer drying model of apricot at low temperature
 Authors:Wang, Ning1 ; Liu, Wenxiu1 ; Li, Fengcheng1 ; Du, Zhilong1
Author affiliation: 1  China National Packaging and Food Machinery Corporation, Beijing 100083, China
 Corresponding author:Liu, W. (Liuwx3725@sina.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:140-143 153
 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:Thin layer drying experiments of apricot in low temperature were carried out on rotation design. The drying characteristics and the drying model of apricot were studied based on temperature and velocity of drying medium. The experiments showed that temperature was the main influencing factor in the drying process. The mathematical model was set as Wang-Singh equation at low temperature and the coefficients of the model were related to temperature and velocity. The established mathematical model could be used to describe the change regulation of moisture ratio well during the drying process of apricot according to the comparison of experimental values and calculated values.
 Number of references:14
 Main heading:Mathematical models
Controlled terms:Curing  -  Drying  -  Experiments  -  Food technology  -  Thin films
Uncontrolled terms:Apricot  -  Calculated values  -  Drying characteristics  -  Drying medium  -  Drying model  -  Drying process  -  Experimental values  -  Influencing factor  -  Low temperatures  -  Moisture ratios   -  Thin layer drying
Classification code:642.1 Process Heating  -  714.2 Semiconductor Devices and Integrated Circuits  -  815.1 Polymeric Materials  -  822 Food Technology  -  901.3 Engineering Research  -  921 Mathematics
 Database:Compendex
   
32.Accession number: 20111213783700
 Title:Behavior of passive stubble-cutting disc with oblique ripples
 Authors:Zhao, Xu1 ; Zhang, Zuli2 ; Tang, Ping1 ; Zhang, Guoliang3 ; Zhang, Weizheng2
Author affiliation: 1  School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China
2  College of Engineering, Shenyang Agricultural University, Shenyang 110161, China
3  College of Forestry, Agricultural University of Hebei, Baoding 071000, China
 Corresponding author:Zhang, Z. (sauzhangzl@yahoo.com.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:64-67
 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:Passive stubble-cutting disc with oblique ripple was taken as the object. Based on the method of velocity instantaneous centre, seeder advance speed and in-soil depth of cutting disc were chosen as the main factors affecting stubble-cutting speed. Stubble-cutting depth and draught resistance were the indicators of cutting disc performance experiment, while seeder advance speed and weight assigned to the cutting disc were the experimental factors. Two-indicator and two-factor orthogonal field experiment was carried out for passive stubble-cutting disc with oblique ripples. The results showed that both stubble-cutting depth and draught resistance increased with the two factors, and pullback weight was the principal factor to stubble-cutting depth. When pullback weight on cutting disc reached a certain degree, influence of seeder advance speed on stubble-cutting depth was more prominent than that on draught resistance.
 Number of references:14
 Main heading:Experiments
Uncontrolled terms:Draught resistance  -  Method of velocity instantaneous centre  -  Pullback weight  -  Stubble-cutting depth  -  Stubble-cutting disc with oblique ripples
 Classification code:901.3 Engineering Research
 Database:Compendex
   
33.Accession number: 20111213783721
 Title:Cucumber disease toward-target agrochemical application robot in greenhouse
 Authors:Geng, Changxing1 ; Zhang, Junxiong1 ; Cao, Zhengyong1 ; Li, Wei1
Author affiliation: 1  College of Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Geng, C. (gcxk@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:177-180
 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 precision agrochemical application robot installed on elevated guide rails for cucumber disease management in greenhouse was developed. This robot integrated a disease diagnosing and early warning system, a variable agrochemical application system and control system. Diseases were acquired by using machine vision, and quantitative effects were analyzed according to the color and texture for cucumber plants. Relations between environment information cycle data, including illumination, soil temperature, air temperature and moisture, and plant disease valid characteristic were established to realize the early-warning of arising and growing trend of the disease. The environmental elements comparison and lesions on cucumber distribution offered the basis of decision for trajectory planning and target spray. The spray task was performed by a PLC controlled three-degree of freedom Cartesian coordinate manipulator and each individual nozzle. The robot which worked stably and availably was tested in laboratory.
 Number of references:13
 Main heading:Computer vision
  Controlled terms:Disease control  -  Greenhouses  -  Robots  -  Spray nozzles
Uncontrolled terms:Agrochemical application  -  Agrochemical application robot  -  Air temperature  -  Cartesian coordinate  -  Cucumber disease  -  Cucumber plants  -  Degree of freedom  -  Early warning  -  Early Warning System  -  Environment information   -  Guide rail  -  Machine vision  -  Plant disease  -  Quantitative effects  -  Soil temperature  -  Trajectory Planning
Classification code:402.1 Industrial and Agricultural Buildings  -  461.7 Health Care  -  631.1 Fluid Flow, General  -  723.5 Computer Applications  -  731.5 Robotics
 Database:Compendex
   
34.Accession number: 20111213783699
 Title:Influence of spray operating parameters on spray drift
 Authors:Lü, Xiaolan1 ; Fu, Ximin1 ; Song, Jianli2 ; He, Xiongkui2
Author affiliation: 1  Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
2  College of Science, China Agricultural University, Beijing 100193, China
 Corresponding author:Fu, X. (fuximin@263.net)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:59-63
 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 do the research on the influences of the parameters on spray drift, measurements of the drift potential under different wind tunnel conditions were made for different typical nozzles. The results showed that smaller type nozzle, larger spray pressure and wind speed could enhance the drift sensitivity along with the change of spray height, and the sensitivity of LU nozzles was more obvious than ID nozzles. Relative to the wind speed and nozzle type, the spray orientation has an inapparent influence on spray drift.
 Number of references:15
 Main heading:Spray nozzles
 Controlled terms:Aerodynamics  -  Wind effects  -  Wind tunnels
Uncontrolled terms:Drift index  -  Drift potential  -  Droplet  -  Operating parameters  -  Parameters  -  Spray  -  Spray drift  -  Spray pressure  -  Wind speed
Classification code:443.1 Atmospheric Properties  -  631.1 Fluid Flow, General  -  651.1 Aerodynamics, General  -  651.2 Wind Tunnels
 Database:Compendex
   
35.Accession number: 20111213783695
 Title:Flow of pump-turbine on S-shaped region of complete characteristics
 Authors:Zhang, Lanjin1, 2 ; Wang, Zhengwei2 ; Chang, Jinshi3
Author affiliation: 1  Institute of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
2  State Key Laboratory of Hydroscience and Engineering and Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
3  College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Wang, Z. (wzw@mail.tsinghua.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:39-43 73
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The S-shaped region of complete characteristics on pump-turbine is caused by centrifugal force larger than common hydraulic turbine. The flow on that S-shaped region is very much unsteady. In order to obtain the flow on that region, the steady and unsteady simulations were analyzed on turbine, turbine runaway, turbine brake near no-discharge, anti-pump near no-discharge and anti-pump operation conditions which run on S-shaped curve. The results showed that much large eddy existed in vanes and runner. That eddy wasted much water energy and reduced turbine output. Through the unsteady simulation of S-shaped curve, it is found that the pressure pulsation frequency and amplitude in spiral casing and cone of draft tube are similar and the amplitude is small. The pressure pulsation amplitude on guide vanes and blade inlet are high, and those frequencies are also high. Those simulations are always used to know the essence of S-shaped region and reduce the unsteady characteristics.
 Number of references:11
 Main heading:Hydraulic motors
Controlled terms:Aerodynamics  -  Centrifugation  -  Hydraulic machinery  -  Hydraulic turbines  -  Pumps  -  Unsteady flow
Uncontrolled terms:Centrifugal Forces  -  Draft tubes  -  Guide vane  -  Large eddy  -  Pressure pulsation  -  Pump operation  -  Pump-turbines  -  S-shaped  -  S-shaped curves  -  S-shaped region   -  Spiral casing  -  Turbulent model  -  Unsteady characteristics  -  Unsteady simulations  -  Water energy
Classification code:617.1 Hydraulic Turbines  -  618.2 Pumps  -  631.1 Fluid Flow, General  -  632.2 Hydraulic Equipment and Machinery  -  651.1 Aerodynamics, General  -  802.3 Chemical Operations
 Database:Compendex
   
36.Accession number: 20111213783696
 Title:Numerical simulation of internal unsteady flow in a vortex pump
 Authors:Kong, Fanyu1 ; Zhou, Shuiqing1 ; Wang, Zhiqiang2 ; Hu, Li1 ; Qiu, Ning1
Author affiliation: 1  Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
                   2  Shanghai Kaiquan Pump Co., Ltd., Shanghai 200436, China
 Corresponding author:Kong, F. (kongfy2918@sohu.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:44-48
 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 study the vortex pump flow field characteristics of its external, it is necessary to carry out unsteady flow numerical simulation by using RNG k-Ε turbulence model and structured grid inside the vortex pump. The results showed that the pressure changes within the linear distribution, with flow rate increasing, longitudinal vortex flow decreased, while the radial vortex flow periodically was removed from the leaves and increased with time. The pressure fluctuation at the different monitoring points was changed periodically at design condition. The pressure pulse amplitude increased from the entrance to the exit gradually. The blade passing frequency was dominative in the pressure fluctuation. With the flow rate increasing, pressure fluctuation was more obvious under the blade passing frequency.
 Number of references:11
 Main heading:Flow simulation
Controlled terms:Aerodynamics  -  Pumps  -  Turbulence models  -  Unsteady flow  -  Vortex flow
Uncontrolled terms:Blade passing frequency  -  Design condition  -  Internal unsteady flow  -  Linear distribution  -  Longitudinal vortices  -  Monitoring points  -  Numerical simulation  -  Pressure change  -  Pressure fluctuation  -  Pressure pulse   -  Structured grid  -  Vortex pumps
Classification code:618.2 Pumps  -  631.1 Fluid Flow, General  -  651.1 Aerodynamics, General
 Database:Compendex
   
37.Accession number: 20111213783727
Title:Design and simulation of a high pressure proportional pneumatic pressure reducing valve
 Authors:Xu, Zhipeng1, 2 ; Wang, Xuanyin1 ; Luo, Yuxi1
Author affiliation: 1  State Key Lab. of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
2  College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
 Corresponding author:Xu, Z. (zhp_xu@hotmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:209-212 222
 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 high pressure electronic pneumatic pressure reducing valve, consisted of a two-position three-port pilot valve controlled by electromagnet and a piston type main valve, was proposed. The valve used a pressure sensor and a controller to constitute the closed-loop feedback. By consuming a little gas in the pilot valve, rapidity and stability of pressure regulation were preserved, the influences of pilot leakage on the valve and unexpected icing in pilot valve could be avoided. Then the characteristics were analyzed based on the structure and working principle of the valve, finally the simulation model including the vibration of gas supply pressure and load flow rate was built up with AMESim. Simulation results showed that steady pressure reduction could be achieved under the condition of gas supply pressure slowly reducing and load flow rate fluctuating in a big range. When gas supply pressure is 31.5MPa, the output pressure could be steady in 1~30 MPa without adjusting the controller parameters; the influences of machining errors on the valve were also simulated, the results showed that under-lap of pilot spool should be avoided to reduce gas consuming and 10 μm is a suitable choice for the height of annular clearance.
 Number of references:10
 Main heading:Gases
 Controlled terms:Flow simulation  -  Gas supply  -  Pneumatics  -  Vibration analysis
Uncontrolled terms:Annular clearance  -  High pressure  -  Lap type  -  Pilot valve  -  Pressure reducing valve
Classification code:522 Gas Fuels  -  632.3 Pneumatics  -  723.5 Computer Applications  -  931.2 Physical Properties of Gases, Liquids and Solids  -  943.2 Mechanical Variables Measurements
 Database:Compendex
   
38.Accession number: 20111213783701
 Title:Dynamic simulation experiment of one-blade cutting sugarcane process
 Authors:Zhou, Shicheng1 ; Yang, Wang1 ; Yang, Jian1 ; Liang, Zhaoxin2 ; Mo, Jianlin2
Author affiliation: 1  College of Mechanical Engineering, Guangxi University, Nanning 530004, China
2  Guangxi Research Institute of Agricultural Machinery, Nanning 530001, China
 Corresponding author:Yang, J. (yangokok@gxu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:68-73
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:By using explicit dynamic simulation software ANSYS/LS-DYNA, the sugarcane-cutter system dynamics simulation model was established. The precision of the simulation model was verified by physical experiment. By using four-factor of second order general rotation composite design and the sugarcane-cutter system dynamics simulation model, the dynamics simulation of one-blade cutting sugarcane was carried out. The mathematical model of the influencing factors, cutting forces and shear stresses was established. The influence law of the factors and their interaction were analyzed, and the respective optimization of the factors was gained. The optimal cutting force interval with 95% reliability was obtained. The results showed that when knife-edge angle of blade is 17.5°, cutting angle of blade is 27.73°, obliquity of disc cutter is 28° and cutting velocity is 16 m/s, the optimal cutting force interval with 95% reliability is from 235.82 N to 297.98 N.
 Number of references:11
 Main heading:Computer simulation
Controlled terms:Computer software  -  Cutting  -  Mathematical models  -  Optimization  -  System theory
Uncontrolled terms:Composite designs  -  Cutting angles  -  Cutting forces  -  Cutting velocity  -  Disc cutter  -  Dynamic simulation experiment  -  Dynamics simulation  -  Edge angle  -  Explicit dynamics  -  Influencing factor   -  Optimal cutting  -  Optimal cutting force  -  Physical experiments  -  Second orders  -  Simulation  -  Simulation model  -  System dynamics simulation
Classification code:604.1 Metal Cutting  -  723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications  -  921 Mathematics  -  921.5 Optimization Techniques  -  961 Systems Science
 Database:Compendex
   
39.Accession number: 20111213783698
 Title:Drought farmland near surface blown sand and wind erosion controlling effect
 Authors:Sun, Yuechao1 ; Ma, Shuoshi2 ; Chen, Zhi2 ; Zhao, Yonglai1 ; Cui, Hongmei2
Author affiliation: 1  College of Vocational and Technical, Inner Mongolia Agricultural University, Baotou 014109, China
2  College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
 Corresponding author:Sun, Y. (yuechaosun@sina.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:54-58
 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 farmland wind erosion sand calamity, in situ testing was adopted to make test for oat stubble, grave covering and traditional drought farmland by using movable wind erosion tunnel and its matching equipment. In order to provide technical basis, blown sand movement law was researched for the three kinds of farmland, and the mechanism and protection effect of soil erosion were explored for the oat stubble and grave covering affecting drought farmland. It is showed that near surface blown sand movement of oat stubble and grave covering are obviously different from autumn-ploughed farmland, the blown sand movement layer was lifted, near surface wind speed was weakened at different degrees, sediment discharge is less than autumn-ploughed farmland's and would have maximum value in certain height, because of barrier and evacuation effects of oat stubble and grave covering. By anti-erosion efficiency analyzing, it is showed that oat stubble and grave covering have important effect on drought farmland for wind erosion controlling, and the effect of the latter is less than the former.
 Number of references:12
 Main heading:Farms
 Controlled terms:Anoxic sediments  -  Drought  -  Erosion  -  Sand
Uncontrolled terms:Farmland  -  Grave  -  Sand flux  -  Velocity profile  -  Wind erosion
Classification code:444 Water Resources  -  483 Soil Mechanics and Foundations  -  505 Mines and Mining, Nonmetallic  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control
 Database:Compendex
   
40.Accession number: 20111213783693
 Title:Modeling for electronic-control cooling system in engine and its optimization
 Authors:Deng, Yibin1, 2 ; Huang, Ronghua1 ; Wang, Zhaowen1 ; Cheng, Wei3
Author affiliation: 1  School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2  School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
3  Commercial Vehicle Technical Center, Dongfeng Motor Co., Ltd., Wuhan 430056, China
 Corresponding author:Deng, Y. (dengyb@qq.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:31-34 38
 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:Some hypotheses were proposed to analyze engine cooling system according to its structure and operating process. Lumped parameter method was used to build a mathematical model for engine electronic-control cooling system on those hypotheses. Then simulation of engine warming up and experimental verification were implemented, and the results showed that the model was reasonable. Furthermore, numerical simulation of engine coolant temperature control system was conducted. Finally, optimal design method of energy consumption in the case of heat transfer steady state was discussed.
 Number of references:7
 Main heading:Cooling systems
Controlled terms:Computer simulation  -  Cooling  -  Electronic cooling  -  Energy utilization  -  Engines  -  Mathematical models  -  Optimization  -  Thermoelectric equipment
Uncontrolled terms:Control cooling  -  Energy consumption  -  Engine coolant  -  Engine cooling systems  -  Experimental verification  -  Lumped parameter method  -  Modeling  -  Numerical simulation  -  Operating process  -  Optimal design methods   -  Steady state
Classification code:921.5 Optimization Techniques  -  921 Mathematics  -  723.5 Computer Applications  -  641.2 Heat Transfer  -  615.4 Thermoelectric Energy  -  612 Engines  -  525.3 Energy Utilization
 Database:Compendex
   
41.Accession number: 20111213783726
Title:Tool trajectory planning of robotic spray painting and its experiment for complex curved surfaces
 Authors:Chen, Wei1, 2 ; Zhao, Dean1 ; Li, Fazhong1
Author affiliation: 1  School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
2  School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang 212003, China
 Corresponding author:Chen, W. (cwtangya@yahoo.com.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:204-208
 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 complex curved surface was divided into several patches and trajectory planning for each patch was performed. The trajectory integration problem can be modeled as the tool trajectory optimal integration problem (TTOI), and an ant colony algorithm was advanced to solve the TTOI. Simulations were carried out on the automotive body parts and the results validated the proposed algorithm. And a workpiece with a complex curved surface was used to test the scheme. The results of the experiments showed that the trajectory optimization algorithm achieved satisfactory performance, and the time of robotic spray painting saved 20%.
 Number of references:11
 Main heading:Algorithms
Controlled terms:Experiments  -  Global optimization  -  Integration  -  Optimization  -  Robot programming  -  Robotics  -  Robots  -  Surfaces  -  Trajectories
Uncontrolled terms:Ant colony algorithms  -  Automotive body parts  -  Complex curved surface  -  Integration problems  -  Optimal integration  -  Spray painting  -  Tool trajectory planning  -  Trajectory optimization  -  Trajectory planning  -  Work pieces
Classification code:951 Materials Science  -  931 Classical Physics; Quantum Theory; Relativity  -  921 Mathematics  -  901.3 Engineering Research  -  731.5 Robotics  -  723 Computer Software, Data Handling and Applications  -  404.1 Military Engineering
 Database:Compendex
   
42.Accession number: 20111213783729
 Title:Tool wear state recognition based on hyper-sphere support vector machine
 Authors:Liu, Lu1 ; Wang, Taiyong1, 2 ; Jiang, Yongxiang2 ; Hu, Miao2 ; Ning, Qian2
Author affiliation: 1  College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
2  College of Mechanical Engineering, Tianjin University, Tianjin 300072, China
 Corresponding author:Wang, T. (tywang@189.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:218-222
 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:New tool wear state recognition method based on hyper-sphere support vector machines was proposed. The correlation between the tool wear loss and the features acquired from cutting force and vibration signals of different wear states was analyzed. The mean value, mean square root, the energy and approximate entropy of wavelet coefficient were calculated and integrated as the feature vectors. Ultimately, in order to realize recognition of different wear states, hyper-sphere support vector machines (SVMs) algorithm was adopted as classifier. The results show that hyper-sphere SVMs are with excellent study ability, generalization ability and of high recognized precision with small training samples.
 Number of references:10
 Main heading:Support vector machines
Controlled terms:Entropy  -  Gears  -  Pattern recognition  -  Spheres  -  State estimation  -  Vectors  -  Vibration analysis  -  Wavelet transforms  -  Wear of materials
Uncontrolled terms:Approximate entropy  -  Cutting forces  -  Feature vectors  -  Generalization ability  -  Hyper-sphere support vector machine  -  Mean square  -  Mean values  -  Small training  -  Sphere support vectors  -  Tool wear   -  Vibration signal  -  Wavelet coefficients  -  Wear state
Classification code:951 Materials Science  -  943.2 Mechanical Variables Measurements  -  921.3 Mathematical Transformations  -  921.1 Algebra  -  731.1 Control Systems  -  723 Computer Software, Data Handling and Applications  -  716 Telecommunication; Radar, Radio and Television  -  641.1 Thermodynamics  -  631 Fluid Flow  -  601.2 Machine Components  -  421 Strength of Building Materials; Mechanical Properties
 Database:Compendex
   
43.Accession number: 20111213783715
Title:Non-destructive detection of ″Jiro persimmon's soluble-solids by laser imaging analysis
 Authors:Liu, Peng1 ; Tu, Kang1 ; Pan, Leiqing1 ; Xu, Hongrui1 ; Mei, Weiyun2
Author affiliation:1 College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
          2  Yunnan Luting Persimmon Ltd., Shilin 652200, China
 Corresponding author:Tu, K. (kangtu@njau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:144-149
 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 semiconductor laser generator with 650 nm wavelength and power of 13.25 mW was used to irradiate the surface of ″Jiro″ persimmon during the storage and the characteristic laser refractive image was collected by a CCD camera. Through the midpoint subdivision method, the image region segmentation threshold was determined. Then, the image segmentation of the pixel size parameters, regional information entropy of the gray value as well as the standard deviation of gray value was calculated. The system parameters above were chosen as the parameters set. In order to get more compact model, the principal component analysis (PCA) was taken on the parameters set in the forecasting course of ″Jiro″ persimmon's soluble solids. Through the analysis, the most important laser image parameters were obtained for the contribution in forecasting the soluble solids content of ″Jiro″ persimmon. An improved SVM regression model was designed to forecast the ″Jiro″ persimmon's soluble solids content with the laser image parameters obtained by PCA. Both model performance parameters and verification experiments showed that the model had good stability and accuracy with the SVM related index R of 0.9905 and the average prediction accuracy was 94.1%.
 Number of references:20
 Main heading:Principal component analysis
Controlled terms:Cameras  -  CCD cameras  -  Forecasting  -  Image segmentation  -  Lasers  -  Nanoelectronics  -  Regression analysis  -  Semiconductor lasers  -  Support vector machines
Uncontrolled terms:Compact model  -  Good stability  -  Gray value  -  Image regions  -  Laser images  -  Laser imaging  -  Model performance  -  Nondestructive detection  -  Pixel size  -  Prediction accuracy   -  Regional information  -  Regression model  -  Soluble solids content  -  Soluble-solids  -  Standard deviation  -  Subdivision methods  -  Support vector machine regression
Classification code:933 Solid State Physics  -  922.2 Mathematical Statistics  -  761 Nanotechnology  -  744.4.1 Semiconductor Lasers  -  744.1 Lasers, General  -  742.2 Photographic Equipment  -  723.2 Data Processing and Image Processing  -  723 Computer Software, Data Handling and Applications  -  715 Electronic Equipment, General Purpose and Industrial
 Database:Compendex
   
44.Accession number: 20111213783723
Title:Spring maize yield estimation based on combination of forecasting of entropy method and multi-temporal remotely sensed data
 Authors:Su, Tao1 ; Wang, Pengxin1 ; Liu, Xiangge1 ; Yang, Bo2
Author affiliation: 1  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
2  Institute of Scientific and Technical Information, Heilongjiang Academy of Land Reclamation Sciences, Harbin 150036, China
 Corresponding author:Wang, P. (wangpx@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:186-192
 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 highly accurate model for crop yield estimation was developed by using the entropy combination forecasting method. Firstly, the single-temporal remotely sensed Landsat TM/ETM images at main growth and development stages of spring maize in 2007 and 2008 were used to construct the single-temporal yield estimation models. Secondly, the weights of the single-temporal estimation models were calculated by applying the entropy methods. And then, a combination forecasting model was developed. Finally, the two models were compared. The results showed that the yield estimation model based on combination forecasting and multi-temporal remote images could increase the precision of the yield estimation model based on single-temporal remote images, and the correlation coefficient was remarkably improved in comparison with those of the single-temporal models. They were increased by 0.137 and 0.121 respectively. The values of weights in the combined forecasting showed that the sensitive degree was displayed between main growing stages and maize yield, and that was of great importance for some key aspects: (1) looking for the main limiting factor of maize growth; (2) raising maize yield. Therefore, it is feasible and effective to estimate spring maize yield based on the combined forecasting of entropy method and multi-temporal remotely sensed data.
 Number of references:21
 Main heading:Estimation
 Controlled terms:Agriculture  -  Entropy  -  Forecasting  -  Remote sensing
Uncontrolled terms:Combination forecasting  -  Combined forecasting  -  Correlation coefficient  -  Crop yield  -  Entropy methods  -  Estimation models  -  Growth and development  -  Landsat TM/ETM   -  Limiting factors  -  Maize yield   -  Multi-temporal  -  Remotely sensed data  -  Spring maize  -  Temporal models  -  Yield estimation
 Classification code:641.1 Thermodynamics  -  731.1 Control Systems  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  921 Mathematics
 Database:Compendex
   
45.Accession number: 20111213783713
 Title:Design and experiment of integrative fruit-vegetable solar-air drier
Authors:Rouzi, Amuti1 ; Mao, Zhihuai2 ; Li, Feng1 ; Gao, Zebin2 ; Hailili, Shabiti3 ; Zhang, Xuejun1
Author affiliation: 1  College of Mechanical Engineering and Communication, Xinjiang Agricultural University, Urumqi 830052, China
2  College of Engineering, China Agricultural University, Beijing 100083, China
3  Agricultural Machinery Technology Promotion Station of Xinjiang Kizilsu Kirgiz Autonomous Prefecture, Artux 845350, China
 Corresponding author:Rouzi, A. (roziamut@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:134-139
 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 solar-air drier which was applied to dry many kinds of agro-products was studied in order to take advantage of ample solar energy in Xinjiang and improve productivity of solar drying equipment and improve quality of dried fruits and vegetables. Solar energy was the main energy sources and electricity was auxiliary. Azimuth angle and elevation of solar collector could be adjusted manually when sun light changed. The experiment result showed that solar collector could provide 11964 kJ/h heat energy which was sufficient for the drier, but there was 1.5~4.0°C difference in fore and back parts of the drier. The time of drying entire apricot was 79 h which was 52% shorter than convention, the percentage of first-class dried apricot was 85%.
 Number of references:24
 Main heading:Solar energy
Controlled terms:Curing  -  Dryers (equipment)  -  Drying  -  Experiments  -  Fruits  -  Product design  -  Productivity  -  Solar collectors  -  Solar heating  -  Solar radiation   -  Vegetables
Uncontrolled terms:Agro-products  -  Azimuth angles  -  Dried fruits  -  Energy source  -  Heat energy  -  Product processing  -  Solar drying  -  Xinjiang
Classification code:913.1 Production Engineering  -  901.3 Engineering Research  -  821.4 Agricultural Products  -  815.1 Polymeric Materials  -  802.1 Chemical Plants and Equipment  -  657.1 Solar Energy and Phenomena  -  642.1 Process Heating
 Database:Compendex
   
46.Accession number: 20111213783716
 Title:Comparison of domestic and imported sesames and their oil processing properties
 Authors:Liu, Yulan1 ; Chen, Liuyang1 ; Wang, Xuede1 ; Hu, Xiaodong2
Author affiliation: 1  Grain and Food College, Henan University of Technology, Zhengzhou 450052, China
2  Pingyu KBO-Huixin Oil and Fat Co., Ltd., Pingyu 463400, China
 Corresponding author:Liu, Y. (liuyl7446@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:1
 Issue date:January 2011
 Publication year:2011
 Pages:150-153
 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 composition and quality of domestic and imported sesames and their oil processing properties were compared. The results showed that the kernels of imported sesames were larger and more plump than the domestic varieties. The fat content of domestic and imported sesames had no significant difference, but the protein content of domestic sesames was higher than the imported ones. The imported sesames were rich in ash and oxalic acid. The phospholipid, acid value, saponification value, peroxide value of domestic sesames was lower than imported sesames. Antioxidant components content and oxidative stability of domestic sesame oils were higher than imported kind. Fatty acids composition of sesame oil from different cultivated areas had no significant difference. The favor of domestic sesame oil was better than the imported variety.
 Number of references:7
 Main heading:Vegetable oils
 Controlled terms:Fatty acids  -  Organic acids  -  Phospholipids
Uncontrolled terms:Acid value  -  Antioxidant components  -  Domestic sesame  -  Fat contents  -  Imported sesame  -  Oil processing  -  Oxalic Acid  -  Oxidative stability  -  Peroxide value  -  Protein contents   -  Quality  -  Sesame oil
 Classification code:804.1 Organic Compounds
 Database:Compendex