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2011年第42卷第9期共收錄44篇
1. Accession number:20114214431606
  Title:Theoretical Analysis of Differential Connection of Double-stator Hydraulic Motor
  Authors:Wen, Desheng1 ; Lü, Shijun1 ; Du, Xiaojie1 ; Guo, Gaofeng1 ; Tsukiji, Tetsuhiro2 ; Shan, Fulin3 
Author affiliation:1   Department of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
2   Department of Mechanical Engineering, Sophia University, Tokyo 102-8554, Japan
                 3   Machinery Factory, Yanshan University, Qinhuangdao 066004, China
　Corresponding author:Wen, D. ([email protected]) 
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
　Abbreviated source title:Nongye Jixie Xuebao
　Volume:42
  Issue:9
　Issue date:September 2011
  Publication year:2011
  Pages:219-224
  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:From the perspective of differential cylinder, the differential connections of hydraulic motor were studied, and a differential connection method was put forward. Through the analysis of the differential connections of different-acting double-stator motors, the mathematical expressions of the motor's rotational speed and torque were obtained. As for the effect of motor displacement scale factor C on the differential connection, the values of C for the single-acting, double-acting and multi-acting double-stator motor were found out respectively. These can make the motor differential connections turn out the same results or even fail to work. The number of repeated groups and failure points was calculated. This work will offer a new way for the theoretical research of hydraulic motor differential connection.
  Number of references:13
　Main heading:Hydraulics
　Controlled terms:Engineering research  -  Hydraulic motors  -  Stators
  Uncontrolled terms:Differential connection  -  Differential cylinder  -  Double stator  -  Failure points  -  Mathematical expressions  -  Motor displacements  -  Rotational speed  -  Scale Factor  -  Theoretical analysis  -  Theoretical research
Classification code:632.1 Hydraulics  -  632.2 Hydraulic Equipment and Machinery  -  705.1 Electric Machinery, General  -  901.3 Engineering Research
  Database:Compendex

2. Accession number:20114214433361
  Title:Multifractal study on spatial variability of soil hydraulic properties of lou soil
  Authors:Guo, Lijun1 ; Li, Yi1 ; Li, Min1 ; Ren, Xin1 ; Liu, Chuncheng1 ; Zhu, Delan1 
  Author affiliation:1  Key Lab of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A and F University, Yangling, Shaanxi 712100, China
  Corresponding author:Li, Y. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:50-58
  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:In order to discuss spatial distribution characteristics of soil hydraulic properties of Lou soil, samples were taken along lines in the area of wheat and maize crop rotation in Dazhai village, Yangling, Shaanxi. Soil water characteristic curves, saturated hydraulic conductivity, soil water content and soil bulk density were measured. Brooks-Corey models were used to describe soil water characteristic curves, and the spatial variation of Brooks-Corey model parameters (θs, α and n), saturated hydraulic conductivity (Ks), soil water content (θ) and soil bulk density (ρ) were analyzed with multifractal method. Results indicated that Ks, α and n had stronger variability, θs, θ and ρ showed weak variability in the entire sampling directions; the soil hydraulic properties showed multifractal features at different sampling directions; the multifractal structures of θs, θ and ρ were weak at different sampling directions which indicated weak spatial variability. Ks, α and n had obvious multifractal structures at different sampling directions. Their generalized dimensions ranged from 0.7 to 1.9, from 0.6 to 1.2 and from 0.9 to 1.1, respectively, spatial variability were strong, and the spatial distribution structure of Ks was more complex than α and n.
  Number of references:29
  Main heading:Geologic models
Controlled terms:Agriculture  -  Fractals  -  Hydraulic conductivity  -  Soil moisture  -  Soil structure interactions  -  Spatial distribution  -  Water content
Uncontrolled terms:Brooks-Corey model  -  Crop rotation  -  Distribution characteristics  -  Generalized dimension  -  Multi fractals  -  Multifractal structure  -  Saturated hydraulic conductivity  -  Soil bulk density  -  Soil hydraulic properties  -  Soil water content   -  Soil-water characteristic curve  -  Spatial variability  -  Spatial variations
Classification code:921 Mathematics  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  632.1 Hydraulics  -  483.2 Foundations  -  483.1 Soils and Soil Mechanics  -  481.1 Geology  -  444 Water Resources
  Database:Compendex

3. Accession number:20114214431583
  Title:Analysis of cavitation head drop in centrifugal pump with inducer
  Authors:Li, Xiaojun1 ; Yuan, Shouqi1 ; Pan, Zhongyong1 ; Liu, Wei1 ; Luo, Yin1 
Author affiliation:1  Research Center of Fluid Machinery and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Yuan, S. ([email protected]) 
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:89-93
  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 RNG k-Ε turbulence model and Rayleigh-Plesset cavitation function, three dimensional turbulent flow fields in centrifugal pump with inducer were calculated and analyzed numerically. The results showed a good prediction of the head drop for five flow rates. The hydrodynamic mechanism of the head drop was investigated through a local and global study of the flow fields. It was found that head began to approximately drop when the cavitation sheet reached the throat between two adjacent blades. The total pressure breakdown caused by cavitation firstly occurred in the upstream region of the impellers, then progressive decreased as the pressure rose in the whole blade-to-blade passage. Meanwhile, the cavity increased the total pressure of local regions, which would move downstream by the development of cavitation.
  Number of references:9
  Main heading:Cavitation
  Controlled terms:Centrifugal pumps  -  Flow fields  -  Hydraulic machinery  -  Numerical analysis  -  Pumping plants  -  Pumps  -  Three dimensional  -  Turbulence models  -  Turbulent flow
  Uncontrolled terms:Head  -  Head drop  -  Inducer  -  Local region  -  Three dimensional turbulent flow field  -  Total pressure  -  Upstream region
  Classification code:921.6 Numerical Methods  -  902.1 Engineering Graphics  -  632.2 Hydraulic Equipment and Machinery  -  631.1.1 Liquid Dynamics  -  631.1 Fluid Flow, General  -  618.2 Pumps  -  446 Waterworks
  Database:Compendex

4. Accession number:20114214431595
  Title:Extraction technology of changshanhuyou peel total flavonoids by supercritical carbon dioxide fluid
  Authors:Xia, Qile1 ; Zheng, Meiyu1 ; Yang, Ying1 ; Chen, Jianbing1 ; Zhang, Jun1 ; Lu, Shengmin1 
  Author affiliation:1  Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  Corresponding author:Lu, S. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:151-154
  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:Extraction method of Changshanhuyou peel total flavonoids by supercritical carbon dioxide fluid was studied. On the basis of entrainer test and extraction pressure, extraction temperature, dynamic extraction time, CO2 flow rate, orthogonal experiment was carried out. The results showed that entrainer was unnecessary and the optimum extraction pressure was 35 MPa, extraction temperature was 45°C, extraction time for dynamic extraction was 60 min after static extraction for 40 min, and the flow rate of CO2 was 3 L/min. Under above process conditions, the extraction yield of Changshanhuyou peel total flavonoids reached to the maximum of 1.01 mg/g.
  Number of references:10
  Main heading:Extraction
  Controlled terms:Carbon dioxide  -  Flow rate  -  Fluids  -  Supercritical fluid extraction
  Uncontrolled terms:Changshanhuyou peel  -  Dynamic extraction  -  Extraction method  -  Extraction pressure  -  Extraction technology  -  Extraction temperatures  -  Extraction time  -  Extraction yield  -  Orthogonal experiment  -  Process condition   -  Supercritical carbon dioxide fluids  -  Total flavonoids
  Classification code:631 Fluid Flow  -  802.3 Chemical Operations  -  804.2 Inorganic Compounds
  Database:Compendex

5. Accession number:20114214431604
  Title:Configuration design and posture analysis of 3-PTT CNC serial-parallel machine
  Authors:Zhang, Bangcheng1, 2 ; Wang, Yiqiang3 ; Cai, Yun2 ; Yao, Yu2 
  Author affiliation:1   School of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
                 2  School of Soft Technology, Changchun University of Technology, Changchun 130012, China
                 3   Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
  Corresponding author:Wang, Y. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:207-212
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:A type of 3-PTT CNC serial-parallel manipulator with 5-DOF was designed based on comprehensive analysis of the advantages of serial and parallel which characteristics for complex surface processing. The configuration and degrees of freedom was analyzed by using decomposition and synthesis. The analysis and calculations show that the 3-PTT manipulator can satisfy the design needs of CNC serial-parallel machine and the configuration is reasonable. The working space and posture limit of manipulator was analyzed based on the singular constraints and posture factors in Matlab. Simulation results show that the analysis can reflect the complete working space of 3-PTT CNC serial-parallel machine tools and provide a theoretical basis for automatic control of working process.
  Number of references:9
  Main heading:Manipulators
  Controlled terms:Automation  -  Control  -  MATLAB
  Uncontrolled terms:Complex surface  -  Comprehensive analysis  -  Configuration  -  Configuration designs  -  Posture  -  Serial-parallel manipulator  -  Simulation result  -  Theoretical basis  -  Working process  -  Working space
  Classification code:731 Automatic Control Principles and Applications  -  731.5 Robotics  -  732 Control Devices  -  921 Mathematics
  Database:Compendex

6. Accession number:20114214431590
  Title:Predict product yields of corn stalk plasma pyrolysis
  Authors:Zhang, Chunmei1 ; Liu, Qingyu1 ; Yi, Weiming2 ; Bai, Xuewei1 ; Moonki, Jang1 ; Lai, Shipeng3 
  Author affiliation:1  College of Engineering, Shenyang Agricultural University, Shenyang 110866, China
                 2  Research Center of Engineering and Technology for Clean Energy, Shandong University of Technology, Zibo 255049, China
                 3  Construction Ministry Shenyang Gas and Heat Research and Design Institute, Shenyang 110026, China
  Corresponding author:Liu, Q. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:120-123 185
  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 method for predicting product-yield of corn stalk pyrolysis was established by means of BP neural network model. The model consisted of three neuron layers: input layer with four nodes which affected the pyrolysis process. It included input power, air flow rate, feeding rate and pressure, output layer with pyrolysis liquid yield and hidden layer. If the training data were representative, the results obtained by neural network model could be well in accordance with the experimental results and its errors would be less than 5%. The results obtained by neural network are more accurate than those obtained by non-linear regression.
  Number of references:10
  Main heading:Neural networks
  Controlled terms:Forecasting  -  Pyrolysis
  Uncontrolled terms:Air flow-rate  -  BP neural network model  -  Corn stalk  -  Feeding rate  -  Hidden layers  -  Input layers  -  Input power  -  Neural network model  -  Neuron layers  -  Non-linear regression   -  Output layer  -  Plasma pyrolysis  -  Predict  -  Product yields  -  Pyrolysis liquids  -  Pyrolysis process  -  Training data
  Classification code:723.4 Artificial Intelligence  -  802.2 Chemical Reactions  -  921 Mathematics
  Database:Compendex

7. Accession number:20114214433365
  Title:Segmentation of agricultural images using level set and prior information
  Authors:Geng, Nan1 ; Yu, Wei1 ; Ning, Jifeng1 
  Author affiliation:1  College of Information Engineering, Northwest A and F University, Yangling, Shannxi 712100, China
  Corresponding author:Geng, N. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:167-172
  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 C-V model based on level set and prior information was proposed and was applied to segment weed, wheat and apple images. Based on the characteristics of the image, the image was represented by a model which made the image easy to segment at first, and then the data contents of a region of interest in this model were extracted as the prior information. An initial contour by hue was obtained and the proposed model by this contour was initialized, the level set function was iteratively solved. Finally, a stationary contour was obtained. The correct rates of weed, wheat and apple were 0.999, 0.999 and 0.846 respectively and the error rates were 0, 0 and 0.125 respectively.
  Number of references:13
  Main heading:Image segmentation
  Controlled terms:Fruits
  Uncontrolled terms:Agricultural image  -  Data contents  -  Error rate  -  Initial contour  -  Level Set  -  Level set functions  -  Model-based OPC  -  Prior information  -  Priori information  -  Region of interest
  Classification code:741.1 Light/Optics  -  821.4 Agricultural Products
  Database:Compendex

8. Accession number:20114214431598
  Title:Design of distributed precision irrigation control system based on wireless sensor network for tea plantation
  Authors:Han, Antai1, 2 ; He, Yong1 ; Chen, Zhiqiang2 ; Shen, Xiaoli2 ; Han, Ruizhen1 
  Author affiliation:1  College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
                 2  Institute of Electrical Engineering and Electronic Technology, China Jiliang University, Hangzhou 310018, China
  Corresponding author:Han, A. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:173-180
  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:In order to acquire tea plant water requirement precisely and achieve tea plantation precision irrigation control, the distributed precision irrigation control system based on wireless sensor network for tea plantation was developed, and the system architecture, hardware configuration and software design approach were also introduced in detail. According to the characteristics of many wireless sensor network nodes highly dispersed in tea plantation, two kinds of distributed irrigation control methods applied to different scale tea plantations were proposed, and the hierarchical irrigation controller composed of fuzzy controller in the lower layer and optimal controller in the upper layer was designed. The developed system with distributed hierarchical irrigation controller can realize tea plantation precision irrigation control and satisfy the certain irrigation performance index. Preliminary experimentations indicated the rationality and practicability of the system. It can be effectively applied to the large scale precision irrigation areas, such as the cropland, the orchard and the nursery garden, etc.
  Number of references:21
  Main heading:Controllers
  Controlled terms:Distributed parameter control systems  -  Irrigation  -  Sensor nodes  -  Sensors  -  Software design  -  Wireless networks
  Uncontrolled terms:Different scale  -  Distributed control  -  Distributed irrigation controls  -  Fuzzy controllers  -  Hardware configurations  -  Irrigation controllers  -  Irrigation performance  -  Optimal controller  -  Precision irrigation  -  System architectures   -  Tea plantations  -  Tea plants  -  Upper layer  -  Wireless sensor
  Classification code:722 Computer Systems and Equipment  -  723.1 Computer Programming  -  731.1 Control Systems  -  732.1 Control Equipment  -  801 Chemistry  -  821.3 Agricultural Methods
  Database:Compendex

9. Accession number:20114214431593
  Title:Whey protein isolated-polysaccharide multilayer emulsions by layer-by-layer electrostatic self-assembly technique
  Authors:Cui, Jian1 ; Li, Jinlong1 ; Liu, Huan2 ; Yin, Lijun1 ; Li, Yongyu3 
  Author affiliation:1  College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
                 2  Quality and Standards Research Center, Chinese Academy of Fishery Sciences, Beijing 100141, China
                 3  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Li, Y. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:133-137
  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:O/W emulsions (pH value 7.0) stabilized by whey protein isolated was prepared as the primary emulsion at first, and then polysaccharides with different electrical properties, e. g. anionic pectin, neutral guar gum, and cationic chitosan were added to the secondary emulsions structure. The influences of pH value, protein and polysaccharide ratio on the formation of protein-polysaccharide multilayer membranes were investigated. It showed that no electrical reaction between guar gum and emulsion particles could be detected. Chitosan could adsorb to the surface of particles at a pH value 5.0-6.0, however, the formed WPI-chitosan secondary emulsions were unstable. Pectin molecules could absorb to the surface of particles and formed WPI-pectin secondary emulsion at the pH value 3.0-5.0. Stable WPI-pectin secondary emulsion could be formed at pectin concentration 0.2%-0.5%.
  Number of references:15
  Main heading:Multilayers
  Controlled terms:Chitosan  -  Electric properties  -  Electrostatics  -  Emulsification  -  Emulsions  -  pH  -  Proteins  -  Self assembly
  Uncontrolled terms:Electrical reactions  -  Electrostatic self assembly  -  Emulsion particles  -  Emulsion stability  -  Guar gums  -  Layer-by-layers  -  Multilayer membranes  -  O/W emulsions  -  Pectin concentration  -  pH value   -  Whey proteins
  Classification code:933.1 Crystalline Solids  -  804.1 Organic Compounds  -  804 Chemical Products Generally  -  951 Materials Science  -  802.3 Chemical Operations  -  801 Chemistry  -  701.1 Electricity: Basic Concepts and Phenomena  -  801.1 Chemistry, General
  Database:Compendex

10. Accession number:20114214431605
  Title:Modification of normal load's analytic solutions for joint interface and quantitative experimental verification
  Authors:Tian, Hongliang1 ; Zhu, Dalin1 ; Qin, Hongling1 ; Lin, Weigong1 
  Author affiliation:1  College of Mechanical and Material Engineering, China Three Gorges University, Yichang 443002, China
  Corresponding author:Tian, H. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:213-218
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:A method to identify such two important characteristic parameters of joint interfaces as fractal dimension and fractal roughness was given. The expression of normal total load in joint interface was modified. A joint interface was selected as an example in XHK5140 automatic tool-changing CNC vertical boring and milling machine tool on the basis of the experimental results about test specimen, the theoretical solutions for normal and tangential contact stiffness were verified in terms of qualitative comparison principle of resembling mode shape and quantitative comparison principle of natural frequencies. The theoretical mode shapes agreed well with the experimental results. The relative errors between the theoretical natural frequencies and the experimental ones are between -9% and 9%.
  Number of references:6
  Main heading:Fractal dimension
  Controlled terms:Natural frequencies
  Uncontrolled terms:Analytic solution  -  Characteristic parameter  -  Comparison principle  -  Experimental verification  -  Joint interfaces  -  Mode shapes  -  Normal loads  -  Quantitative comparison  -  Relative errors  -  Tangential contact   -  Test specimens  -  Theoretical solutions  -  Total load
  Classification code:711.1 Electromagnetic Waves in Different Media  -  921 Mathematics
  Database:Compendex

11. Accession number:20114214431577
  Title:Control strategy of diesel engine based on software and hardware reusability
  Authors:Wei, Xiong1 ; Mao, Xiaojian1 ; Xiao, Wenyong1 ; Zhu, Keqing1 ; Zhuo, Bin1 
  Author affiliation:1  School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  Corresponding author:Wei, X. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:40-44
  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:First of all, the control commons of idle speed adjust (ISA), power take off (PTO) and cruise control system (CCS) were concluded; and then, ISA, PTO and CCS were designed based on the software and hardware reusability and were successfully realized on GD electronic controlled diesel engine; last but not the least, the control strategies were verified on the hard in loop (HIL) bench and further on vehicle test, whose result demonstrated that the control functions based on software and hardware reusability would not affect with each other and have a satisfactory control result. By using this method, not only the duplication effort can be avoided, but the development cost can also be cut.
  Number of references:7
  Main heading:Computer software reusability
  Controlled terms:Computer control  -  Diesel engines  -  Power electronics  -  Remote control  -  Reusability  -  Software testing
  Uncontrolled terms:Control functions  -  Control strategies  -  Cruise control systems  -  Development costs  -  Electronic controlled diesel engines  -  Electronic controls  -  Idle speed  -  Satisfactory control  -  Vehicle tests
  Classification code:452.3 Industrial Wastes  -  612.2 Diesel Engines  -  715.2 Industrial Electronic Equipment  -  723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications  -  731.1 Control Systems
  Database:Compendex

12. Accession number:20114214433364
  Title:Determination of acid value of edible oils based on electrical conductivity change value of alkaline solution during reaction
  Authors:Yu, Xiuzhu1 ; Yang, Chen1 ; Du, Shuangkui1 ; Gao, Jinming2 
  Author affiliation:1  College of Food Science and Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
                 2  College of Science, Northwest A and F University, Yangling, Shaanxi 712100, China
  Corresponding author:Gao, J. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:146-150
  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 electrical conductivity method for determination of acid value in edible oil was developed based on the electrical conductivity change value of alkaline solution during reaction, and the effects on determination of the varying condition, as concentration of the alkaline solution, types of the oil samples, temperature and the solid-liquid ratio were explored. The method was validated by Chinese national standard methods. The results showed the experimental conditions had no significant effect on the determination. When the solid-liquid ratio was 1:10, the calibration was y=0.0024x-0.1571 (where x is the value of the conductivity change, y is acid values), R2=0.9984. The linear correlativity of the determination of the acid value between two methods was very well, the relative deviation of blind samples experiment's data were less than 10%.
  Number of references:14
  Main heading:Electric conductivity of solids
  Controlled terms:Liquids  -  Oils and fats
  Uncontrolled terms:Acid value  -  Alkaline solutions  -  Chinese national standard  -  Conductivity changes  -  Determination  -  Edible oil  -  Electrical conductivity  -  Experimental conditions  -  Oil samples  -  Relative deviations   -  Solid-liquid ratio
  Classification code:804.1 Organic Compounds  -  931.2 Physical Properties of Gases, Liquids and Solids
  Database:Compendex

13. Accession number:20114214431599
  Title:Implementation of even sampling layout by electrons repulsion simulation
  Authors:Chen, Baisong1 ; Pan, Yuchun2 ; Wang, Jihua2 ; Fu, Zhuo3 ; Zeng, Zhixuan2 
  Author affiliation:1  School of Geography, Beijing Normal University, Beijing 100875, China
                 2 National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
                 3 Satellite Environmental Application Center, Ministry of Environmental Protection of the People's Republic of China, Beijing 100094, China
  Corresponding author:Wang, J. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 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 method for an even distribution of N sampling points within a given polygon which contained inaccessible constraints was presented based on the simulation of ideal electrons' repulsion movement. First, the edges of the polygon and the inner constraints into bunches of fixed electrons were described. N electrons can then be put into the polygon in random positions. And then they were 'free and hold' one by one and were moving under Coulombic force. Finally, a balance was achieved with their resultant force and velocities approach to zero. At this time, these N electrons were evenly distributed within the given region; thus, their layout was considered to be an even sampling layout of N samples. Theoretical analysis and the experimental results indicated that electrons' repulsion simulation is a simple and efficient method for implementing even sampling layout of N samples within a complex polygon.
  Number of references:11
  Main heading:Electrons
  Uncontrolled terms:Coulombic forces  -  Efficient method  -  Evenness sampling layout  -  Inner constraint  -  Random position  -  Resultant forces  -  Sampling points  -  Simulation
  Classification code:701.1 Electricity: Basic Concepts and Phenomena
  Database:Compendex

14. Accession number:20114214431596
  Title:Design and experiment of picking mechanism for strawberry harvesting robot
  Authors:Zhang, Kailiang1 ; Yang, Li2 ; Zhang, Tiezhong2 
  Author affiliation:1  Institute of Automation, Chinese Academy of Sciences, Beijing 100190, China
                 2  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Zhang, T. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:155-161
  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 part of technologies of strawberry harvesting robot was researched and an automatic picking mechanism of executive body which in connection with the strawberries planted in hill-culture was developed. Ripe strawberries could be distinguished and located by the machine vision system of the executive body, and the fruits were harvested by gripping and cutting peduncles so as to achieve scatheless picking. Moreover, a method that did not depend on high precise equipments was adopted to control the robot, so the cost was reduced greatly. Experiments of the robot were carried out and the results showed that the success ratio of scatheless picking was more than 90%.
  Number of references:18
  Main heading:Machine design
  Controlled terms:Computer vision  -  Experiments  -  Fruits  -  Harvesting  -  Robots
  Uncontrolled terms:Automatic picking  -  Harvesting robot  -  High-precise  -  Machine vision systems  -  Scatheless picking  -  Strawberry  -  Success ratio
  Classification code:601 Mechanical Design  -  723.5 Computer Applications  -  731.5 Robotics  -  821.3 Agricultural Methods  -  821.4 Agricultural Products  -  901.3 Engineering Research
  Database:Compendex

15. Accession number:20114214431579
  Title:Distribution characteristic and growing dynamic of grape vine roots under alternate partial root zone drip irrigation
  Authors:Zhou, Qingyun1 ; Wang, Yangren1 ; Sun, Shuhong1 
  Author affiliation:1  Department of Hydraulic Engineering, Tianjin Agricultural University, Tianjin 300384, China
  Corresponding author:Zhou, Q. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:59-63 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:The special distribution of root and root growing dynamic in the grape growth period were studied with a core sampling scheme and ET-100 system. The results showed that roots of grape vine centralized in the radial space between 0 and 100 cm, and the amount of the roots accounted for over 80% of total roots. The horizontal distribution of root density of grape vine was minus exponent. The roots of grape vine centralized in the depth between 0 and 60 cm, and the amount of the roots accounted for over 75% of total roots. Under the alternate partial root zone irrigation, the available root of grape vine grew differently in the wetted zone and in the dry zone. It was limited by soil moisture condition and its own growing. The distribution of new root of grape vine was parabola in both the wetted zone and the dry zone.
  Number of references:16
  Main heading:Fruits
  Controlled terms:Irrigation  -  Soil moisture  -  Wetting
  Uncontrolled terms:Alternate partial root-zone irrigation  -  Core sampling  -  Distribution characteristics  -  Drip irrigation  -  Grape root  -  Grape vine  -  Growth period  -  Horizontal distribution  -  Minirhizotrons  -  Moisture conditions   -  Root density  -  Root zone  -  Space between
  Classification code:483.1 Soils and Soil Mechanics  -  821.3 Agricultural Methods  -  821.4 Agricultural Products  -  931.2 Physical Properties of Gases, Liquids and Solids
  Database:Compendex

16. Accession number:20114214431572
  Title:Key influence factors investigation on the electronic unit pump injection characteristics
  Authors:Fan, Liyun1 ; Tian, Bingqi1 ; Ma, Xiuzhen1 ; Song, Enzhe1 ; Li, Jianqiu2 
Author affiliation:1   Department of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China
                  2  State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
  Corresponding author:Fan, L. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:14-20
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:The simulation model electronic unit pump (EUP) was established in AMESim environment. The accuracy of the model was validated by comparing with the experiment results. By simulating, the influence of cam profile velocity, plunger diameter, length of high pressure fuel pipe, inner diameter of high pressure fuel pipe on injection pressure, cycle fuel injection quantity, fuel injection duration and coefficient of fuel feeding was revealed. By using the design of experiments (DOE) method, and taking the interaction into consideration, correlation between various factors and injection characteristic was analyzed. The correlation coefficient was obtained by analysis, the results show that not only the single factor but also the interaction factor of various influence parameters has correlation with the injection characteristic, and the correlation coefficient represents complex law with the speed variation.
  Number of references:10
  Main heading:High pressure effects
  Controlled terms:Computer simulation  -  Correlation methods  -  Design of experiments  -  Experiments  -  Fuel injection  -  Fuels  -  Pipe  -  Pumps
  Uncontrolled terms:Cam profile  -  Correlation analysis  -  Correlation coefficient  -  Design of experiments methods  -  Electronic unit pump  -  Fuel feeding  -  Fuel injection system  -  Fuel pipes  -  High pressure  -  Influence factors   -  Influence parameter  -  Injection durations  -  Injection pressures  -  Injection quantity  -  Inner diameters  -  Interaction factor  -  Simulation model  -  Speed variations
  Classification code:922.2 Mathematical Statistics  -  901.3 Engineering Research  -  723.5 Computer Applications  -  619.1 Pipe, Piping and Pipelines  -  931.2 Physical Properties of Gases, Liquids and Solids  -  618.2 Pumps  -  523 Liquid Fuels  -  522 Gas Fuels  -  521 Fuel Combustion and Flame Research  -  524 Solid Fuels
  Database:Compendex

17. Accession number:20114214431607
  Title:Poor information material brinell hardness measurement uncertainty evaluation based on monte carlo method
  Authors:Huang, Songling1 ; Ge, Leyi1 ; Wang, Zhongyu1 ; Zhao, Wei1 
  Author affiliation:1  Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
  Corresponding author:Huang, S. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:225-229
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Based on poor Brinell hardness measurement information, a novel uncertainty evaluation method was described. According to analyzing the data of all error sources or the limited measurement results, characteristics of these data were gained. And then, by big sample random simulations, sample space of these data can be expanded. Finally, in terms of the Bessel formula and the uncertainty synthesis principle, poor information Brinell hardness measurement uncertainty can be evaluated rightfully. By a practical Brinell hardness measurement, the validity of proposed method was proved.
  Number of references:20
  Main heading:Uncertainty analysis
  Controlled terms:Hardness  -  Measurements  -  Monte Carlo methods
  Uncontrolled terms:Brinell-hardness measurement  -  Error sources  -  Measurement results  -  MONTE CARLO  -  Poor information  -  Random simulation  -  Sample space  -  Uncertainty  -  Uncertainty evaluation
  Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  951 Materials Science  -  941 Acoustical and Optical Measuring Instruments  -  922.1 Probability Theory  -  421 Strength of Building Materials; Mechanical Properties  -  922.2 Mathematical Statistics
  Database:Compendex

18. Accession number:20114214431588
  Title:Fluid leakage characteristics test on the balance cavity of floating impeller
  Authors:Liu, Zailun1 ; He, Rui1 ; Fan, Ying1 
  Author affiliation:1  College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  Corresponding author:Liu, Z. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:113-115
  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:Operating conditions of the floating impeller was simulated with special equipment, and the fore-and-aft pressure of the back seal ring on the impeller was measured directly. The test curves of fore-and-aft pressure of the back seal ring and pump head were obtained. Thus the fluid leakage curve of the balance cavity of the floating impeller was got. The study solved the calculation problem of chamber pressure and leakage calculation in balance cavity of the floating impeller.
  Number of references:7
  Main heading:Impellers
  Controlled terms:Fluids  -  Seals
  Uncontrolled terms:Chamber pressure  -  Characteristics test  -  Floating impeller  -  Fluid leakage  -  Fluid leakage characteristics  -  Operating condition  -  Pump head  -  Seal rings
  Classification code:601.2 Machine Components  -  619.1.1 Pipe Accessories  -  631 Fluid Flow
  Database:Compendex

19. Accession number:20114214431601
  Title:Design of intelligent monitoring system for aquaculture
  Authors:Shi, Bing1, 2 ; Zhao, Dean1 ; Liu, Xingqiao1 ; Jiang, Jianming2 ; Sun, Yueping1 
  Author affiliation:1  School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
                  2  School of Information Science and Engineering, Changzhou University, Changzhou 213164, China
  Corresponding author:Zhao, D. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:191-196
  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:One kind of monitoring system with function of tracing was designed to apply in industrialized aquaculture, data communication. It was accomplished via PROFIBUS-DP. Data from field were processed by computer with algorithm of fuzzy control and artificial neural networks, and control signals were produced to ensure the system to run in style of closed loop. The technology of radio frequency identification (RFID) was also applied into the system to realize function of quality tracing. Finally the results including the precision of dissolved oxygen and temperature, the scale of total ammonia and nitrogen and the scale of pH value showed that the system completely met the demand of industrialized aquaculture and the integrity. The validity of information of tracing system also met the demands.
  Number of references:11
  Main heading:Monitoring
  Controlled terms:Aquaculture  -  Computer control systems  -  Dissolved oxygen  -  Fuzzy control  -  Fuzzy neural networks  -  Radio frequency identification (RFID)  -  Radio waves
  Uncontrolled terms:Algorithm of fuzzy  -  Closed loops  -  Control signal  -  Data-communication  -  Fieldbus  -  Industrialized aquaculture  -  Intelligent monitoring systems  -  Monitoring system  -  pH value  -  PROFIBUS-DP   -  Quality tracing  -  Radio frequencies
  Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  821.3 Agricultural Methods  -  731.1 Control Systems  -  723.5 Computer Applications  -  723.4 Artificial Intelligence  -  711 Electromagnetic Waves  -  445 Water Treatment  -  444 Water Resources
  Database:Compendex

20. Accession number:20114214433362
  Title:Influence of the offset of labyrinth channels of drip emitters on hydraulic and anti-clogging performance
  Authors:Yu, Liming1, 2 ; Wu, Pute3 ; Niu, Wenquan3 
  Author affiliation:1  Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
                 2 School of Hydraulic Engineering, Changsha University of Science and Technology, Changsha 410114, China
                 3  College of Water Resource and Architectural Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
  Corresponding author:Yu, L. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:64-68 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:The influence of offsets (-0.25 mm, 0, 0.25 mm, 0.50 mm) of dental labyrinth channels of drip emitters on hydraulic and anti-clogging performance was studied by the following methods: there were numerical simulations carried out for the liquid-phase flow and the liquid-solid two-phase flows in the flow field by the CFD program Fluent, and the samples were tested. The obtained results showed positive relationship between offset and discharge coefficient, and negative relationship between offset and flow state exponent. With the increasing of the offset of emitters, the anti-clogging ability declined. Thus, combining the hydraulic and anti-clogging performance, under the condition of adequate flow state exponent, it put forward a suggestion that reducing the offset as much as possible to enhance the anti-clogging performance.
  Number of references:22
  Main heading:Hydraulics
  Controlled terms:Liquids  -  Multiphase flow  -  Numerical methods  -  Software testing
  Uncontrolled terms:Anti-clogging ability  -  Emitters  -  Hydraulic performance  -  Labyrinth channels  -  Offset
  Classification code:631.1 Fluid Flow, General  -  632.1 Hydraulics  -  723.5 Computer Applications  -  921.6 Numerical Methods  -  931.2 Physical Properties of Gases, Liquids and Solids
  Database:Compendex

21. Accession number:20114214431584
  Title:Performance prediction and circulation distribution analysis at impeller inlet and outlet of mixed-flow pump
  Authors:Shi, Weidong1 ; Zou, Pingping1 ; Zhang, Desheng1 ; Zhou, Ling1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Shi, W. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:94-97
  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 reveal the internal flow laws of large-scale mixed-flow pumps, a high specific speed mixed-flow pump was simulated based on the standard k-Ε turbulence model and SIMPLEC algorithm by using software FLUENT. The axial velocity and circulation distributions of steady flow under working conditions of 0.8Qopt, 1.0Qopt, and 1.2Qopt at impeller outlet were obtained. The numerical results showed that the flow was stable under all the three working conditions; the axial velocity gradually decreased from hub to tip; the circulation flow pattern of the mixed-flow was nonlinear at impeller inlet, and approximately uniform at impeller outlet. The negative pressure zone which gradually expanded with the flow rate increasing existed obviously at the suction side. The study provided a certain reference for the hydraulic design of mixed-flow pump.
  Number of references:9
  Main heading:Inlet flow
  Controlled terms:Computer simulation  -  Flow measurement  -  Impellers  -  Pumps  -  Turbulence models
  Uncontrolled terms:Axial velocity  -  Circulation distribution  -  Circulation flow  -  High specific speed  -  Hydraulic designs  -  Impeller inlets  -  Impeller outlet  -  Internal flows  -  Mixed flow pump  -  Negative pressures   -  Numerical results  -  Performance prediction  -  SIMPLEC algorithm  -  Software FLUENT  -  Suction side  -  Working conditions
  Classification code:601.2 Machine Components  -  618.2 Pumps  -  631.1 Fluid Flow, General  -  723.5 Computer Applications
  Database:Compendex

22. Accession number:20114214431581
  Title:Pressure fluctuations of the impeller in a double-suction centrifugal pump
  Authors:Qu, Lixia1 ; Wang, Fujun1 ; Cong, Guohui1 ; Yao, Zhifeng1 
  Author affiliation:1  College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Wang, F. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:79-84 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:The large eddy simulation method with sliding mesh technology was used to investigate unsteady flow characteristic in a double-suction centrifugal pump on different operating conditions. The unsteady flow in the impeller, especially on the blade surface was focused on. The results showed that the rotating frequency dominated the pressure fluctuations in the impeller at design and off-design conditions. The amplitude of the pressure fluctuation became higher when the flow rate was farer from the design flow rate, especially at Q/Qd=0.62 that the maximum amplitude occurred, nearly three times of design condition. At design condition, the maximum amplitude of pressure fluctuations happened on the blade leading edge, nearly 14% of average pressure, which was respectively 86% and 169% higher than the centers of the blade pressure side and suction side.
  Number of references:12
  Main heading:Pumps
  Controlled terms:Aerodynamics  -  Centrifugal pumps  -  Design  -  Flow rate  -  Hydraulic machinery  -  Impellers  -  Large eddy simulation  -  Pumping plants  -  Unsteady flow
  Uncontrolled terms:Blade  -  Blade pressure  -  Blade Surface  -  Design condition  -  Design flow rate  -  Double-suction centrifugal pump  -  Flow characteristic  -  Large eddy  -  Large Eddy simulation methods  -  Leading edge   -  Maximum amplitude  -  Off design condition  -  Operating condition  -  Pressure fluctuation  -  Rotating frequencies  -  Sliding mesh  -  Suction side
  Classification code:921 Mathematics  -  651.1 Aerodynamics, General  -  632.2 Hydraulic Equipment and Machinery  -  631.1 Fluid Flow, General  -  631 Fluid Flow  -  618.2 Pumps  -  601.2 Machine Components  -  446 Waterworks  -  408 Structural Design
  Database:Compendex

23. Accession number:20114214431576
  Title:Zero fuel auto-learning calibration of injector in high pressure common rail diesel engine
  Authors:Ren, Weijun1 ; Shi, Xianxin2 ; Jiao, Shengjie1 ; Zhu, Changjian2 ; Zhang, Qiong1 
  Author affiliation:1  School of Information Engineering, Chang'an University, Xi'an 710064, China
                 2  Xuzhou Construction Machinery Group Co., Ltd, Xuzhou 221004, China
  Corresponding author:Ren, W. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:35-39
  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 zero fuel auto-learning calibration strategy was adopted and the concept of engine segment acceleration was introduced. When the necessary condition for calibration and the rail pressure defined by the calibration were required in overrun phase, zero fuel calibration triggered small injections to a cylinder, and attempted to detect a change in the engine crankshaft segment acceleration. Then, the parameters for the injections were changed in predefine step value for the energizing time until a predefined segment acceleration change was detected between two neighborhood injections. Finally, the energizing time was saved as zero quantity calibration value of the injector in the rail pressure defined. The injection bench and the experimental vehicle test results showed that zero fuel auto-learning calibration strategy does not need to add any components, and it has higher calibration veracity and real-time characteristic.
  Number of references:8
  Main heading:Calibration
  Controlled terms:Crankshafts  -  Diesel engines  -  Engine cylinders  -  Fuels  -  Jet pumps
  Uncontrolled terms:Acceleration change  -  Calibration values  -  Engine crankshafts  -  Experimental vehicle  -  High pressure common rail diesel engine  -  Injector  -  Rail pressures  -  Real time characteristics  -  Strategy  -  Zero fuel calibration
  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  -  618.2 Pumps  -  612.2 Diesel Engines  -  612.1.1 Internal Combustion Engine Components  -  601.2 Machine Components  -  524 Solid Fuels  -  523 Liquid Fuels  -  522 Gas Fuels
  Database:Compendex

24. Accession number:20114214431570
  Title:Simulation of diesel engine fueled with different water-emulsion rates and different oxygen concentrations in intake air
  Authors:Zhang, Wei1, 2 ; Shu, Gequn1 ; Shen, Yinggang2 ; Zhao, Wei1 ; Liang, Youcai2 
  Author affiliation:1  State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
                 2  Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming 650500, China
  Corresponding author:Shu, G. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 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:The oxygen-enriched intake air technology was applied in a DI diesel engine, the volume fraction of oxygen as follows: 21%, 22%, 23% and 24% respectively. The effect of matching between pure diesel, 10%, 20% and 30% water emulsion diesel on combustion or emission was investigated and simulated. The experiment and simulation were both carried out under the maximum torque working condition of the test engine. The result revealed that under the conditions of burning same emulsion diesel, with the increase of oxygen concentration, the ignition timing decreased and the max pressure increased. Under the same intake air condition, the ignition timing will be delayed with the increase of water rate in emulsion diesel. The ignition timing and combustion rate could be controlled through different water-emulsion rates matched with different oxygen concentrations in intake air. Using 30% water emulsion diesel, the lower combustion temperature made the NO emission lower than original engine's NO emission, even though the oxygen reached 24% in intake air. Burning 20% water emulsion diesel, when oxygen concentration is below 22%, the NO emission is better than original. The 10% water emulsion only combustion in air, which NO emission is better than original. With increasing of oxygen concentration in intake air and water rate in emulsion diesel, the smoke emission is lower than original engine. Analysis on combustion temperature with the chamber impress-cuts of TDC, ATDC 4°CA and ATDC 10°CA, the water content in emulsion diesel has great impact on low-temperature chemical reaction and the oxygen concentration in intake air is more effective on high-temperature reaction.
  Number of references:14
  Main heading:Air intakes
  Controlled terms:Concentration (process)  -  Diesel engines  -  Emulsification  -  Engines  -  Ignition  -  Oxygen  -  Water content
  Uncontrolled terms:Combustion characteristics  -  DI diesel engine  -  Oxygen-enriched  -  Oxygen-enriched combustion  -  Water emulsion diesel
  Classification code:804 Chemical Products Generally  -  802.3 Chemical Operations  -  631.1 Fluid Flow, General  -  612.2 Diesel Engines  -  612 Engines  -  521.1 Fuel Combustion  -  444 Water Resources
  Database:Compendex

25. Accession number:20114214431580
  Title:Numerical simulation on three dimensional flow in two-way reversible pumping system
  Authors:Liu, Chao1 ; Jin, Yan1 
  Author affiliation:1  College of Hydraulic Engineering, Yangzhou University, Yangzhou 225009, China
  Corresponding author:Liu, C. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 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 prevent and eliminate vortex and the vortex tube occurred in the suction passage of two-way-reversible pumping system for the safe operation of the pump unit, an additional curved guide pier was placed on the bottom of suction passage under pump mouth. By using the CFD software the numeric simulation was made to obtain three-dimensional flow fields inside the pumping system with the additional guide pier and predict the performance of the pumping system. Combined with the model test, this paper focused on the velocity distribution of suction passage outlet, and its influences on the pump system performance. Both the computation and the measurement results showed that the additional guide pier on the bottom inside the suction passage did not effect on the velocity distribution of suction passage. The velocity evenness of suction passage outlet reach 93% with guide pier, which can meet the needs of pump operation. The performance of the pumping system was good and the high efficiency of the system at BEP is 68.89%. Experimental observations showed that the set of the guide pier could effectively prevent the vortex generation under pump inlet, the vortices were not found within the suction passage under different operation conditions. The pump ran smoothly without vibration. Comparing the calculated results with the model test results of the outlet velocity distribution of the suction passage, both of them are similar in overall structure and pump performance prediction at BEP is consistent with the test results.
  Number of references:9
  Main heading:Pumps
  Controlled terms:Computer software  -  Flow simulation  -  Piers  -  Pumping plants  -  Three dimensional  -  Three dimensional computer graphics  -  Velocity  -  Velocity control  -  Velocity distribution  -  Vortex flow
  Uncontrolled terms:CFD softwares  -  Experimental observation  -  Guide pier  -  High efficiency  -  Measurement results  -  Model tests  -  Numeric simulation  -  Operation conditions  -  Pump operation  -  Pump performance   -  Pump system  -  Pumping systems  -  Safe operation  -  Suction passage  -  Test results  -  Three dimensional flow  -  Three dimensional flow field  -  Two-way reversible pumping system  -  Vortex generation  -  Vortex tube
  Classification code:931.1 Mechanics  -  731.3 Specific Variables Control  -  723 Computer Software, Data Handling and Applications  -  931.3 Atomic and Molecular Physics  -  631.1 Fluid Flow, General  -  446 Waterworks  -  407.1 Maritime Structures  -  618.2 Pumps
  Database:Compendex

26. Accession number:20114214431573
  Title:Control model of electrohydraulic proportional cartridge valve for variable nozzle turbocharger
  Authors:Ye, Zibo1 ; Qu, Shengguan1 ; Zhang, Yihua1 
  Author affiliation:1  School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 501641, China
  Corresponding author:Ye, Z. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:21-25
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:According to the control system composition and working principle of AVNT, mathematical model of AVNT valve with cam position feedback signal was established, stability performance and characteristic of current-angle were analyzed. Simulation results show that gain margin and phase margin can make control system with guaranteed stability and better dynamic characteristics. Feasibility of the simulation model was verified by the experiments of crankshaft angel changing with input current after AVNT valve was installed in turbocharger.
  Number of references:8
  Main heading:Control system stability
  Controlled terms:Computer simulation  -  Control systems  -  Crankshafts  -  Hydraulic machinery  -  Hydraulics  -  Mathematical models  -  Nozzles  -  Superchargers  -  Turbomachinery
  Uncontrolled terms:Amplitude margin  -  Cartridge valves  -  Control model  -  Dynamic characteristics  -  Gain margin  -  Hydraulic control valve  -  Input current  -  Phase margins  -  Position feedback  -  Simulation model   -  Simulation result  -  Stability performance  -  System composition  -  Variable nozzle turbocharger  -  Working principles
  Classification code:921 Mathematics  -  731.4 System Stability  -  731.1 Control Systems  -  723.5 Computer Applications  -  632.2 Hydraulic Equipment and Machinery  -  632.1 Hydraulics  -  631.1 Fluid Flow, General  -  618.1 Compressors  -  601.2 Machine Components
  Database:Compendex

27. Accession number:20114214431575
  Title:Influence factors of DeNOx Behavior in Urea-SCR catalytic converter of diesel
  Authors:Xin, Zhe1 ; Zhang, Yin1 ; Wang, Shunxi1 ; Zhang, Yunlong2 ; Liu, Jiaxin1 
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
                 2  Department of Automotive Engineering, Tsinghua University, Beijing 100084, China
  Corresponding author:Xin, Z. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:30-34
  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 influence factors of DeNOx behavior in SCR (selective catalytic reduction) catalysts, with the aid of CFD (computational fluid dynamic) coupled with chemical reaction dynamics, a full-processing simulation and validation tests were conducted on the catalytic substrate. The results show that the temperature is the major factor to influence the conversion efficiency. The optimal temperature for SCR reaction is from 350 to 450°C. Space velocity has a certain influence on conversion efficiency of SCR at low temperature. Increasing NO2 concentration can improve the conversion efficiency, but the volume concentration of NO2/NOx need to be controlled within 50%.
  Number of references:13
  Main heading:Selective catalytic reduction
  Controlled terms:Catalytic converters  -  Computational fluid dynamics  -  Conversion efficiency  -  Diesel engines  -  Efficiency  -  Emission control  -  Nitrogen oxides  -  Reduction  -  Urea
  Uncontrolled terms:Catalytic substrates  -  Chemical reaction dynamics  -  DeNOx conversion efficiency  -  Influence factors  -  Low temperatures  -  Major factors  -  Optimal temperature  -  Simulation  -  Simulation and validation  -  Space velocities   -  Volume concentration
  Classification code:913.1 Production Engineering  -  804.2 Inorganic Compounds  -  804.1 Organic Compounds  -  921.6 Numerical Methods  -  802.2 Chemical Reactions  -  525.5 Energy Conversion Issues  -  451.2 Air Pollution Control  -  612.2 Diesel Engines
  Database:Compendex

28. Accession number:20114214431597
  Title:Recognition of mature litchi in natural environment based on machine vision
  Authors:Xiong, Juntao1 ; Zou, Xiangjun1 ; Chen, Lijuan1 ; Guo, Aixia1 
  Author affiliation:1  Key Lab of Key Technology on South Agricultural Machinery and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
  Corresponding author:Zou, X. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:162-166
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:A recognition method of mature litchi in natural scene was researched. Through analyzing the gray and color features of litchi, the YCbCr color model was selected, and by using threshold segmentation, the Cr component image was selected to remove the complex background, then morphology operation and connected region label were used to remove random noise, and then the one-dimensional random signal histogram analysis and the fuzzy C-means clustering (FCM) segmentation were used to achieve the recognition of litchi fruit and peduncle. The recognition results under different natural conditions showed that the algorithm could segment the fruit successfully and the recognition rate reached to 95.5%.
  Number of references:17
  Main heading:Feature extraction
  Controlled terms:Chromium compounds  -  Computer vision  -  Fruits  -  Fuzzy clustering  -  Fuzzy systems  -  Image recognition  -  Image segmentation
 
  Uncontrolled terms:Color features  -  Color models  -  Complex background  -  Connected region  -  Fuzzy C means clustering  -  Histogram analysis  -  Litchi fruit  -  Mature litchi  -  Morphology operations  -  Natural conditions   -  Natural environments  -  Natural scenes  -  On-machines  -  Random noise  -  Random signal  -  Recognition methods  -  Recognition rates  -  Threshold segmentation
  Classification code:716 Telecommunication; Radar, Radio and Television  -  723 Computer Software, Data Handling and Applications  -  804.1 Organic Compounds  -  821.4 Agricultural Products  -  961 Systems Science
  Database:Compendex

29. Accession number:20114214431594
  Title:Preparation of soybean protein isolate with high emulsification activity
  Authors:Chi, Yujie1 ; Chen, Jungao1 ; Wang, Xibo1 
  Author affiliation:1  College of Food Science, Northeast Agricultural University, Harbin 150030, China
  Corresponding author:Chi, Y. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:138-145
  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 soybean meal was used as the raw material to prepare soy protein isolate (SPI) with high emulsification activity (EA) by the method of microwave-assisted phosphorylation. A response model was established by the central composite rotatable design, with concentration of SPI, ratio of sodium tripolyphosphate (STP), microwave power, time of reaction as four variables and the emulsification activity (EA) as the evaluation index. Response surface analysis revealed that the optimized conditions of preparation of soybean protein isolate with high EA by microwave-assisted phosphorylation were as follows: concentration of SPI 10%, ratio of STP 16%, microwave power 480 W and time of reaction 4 min. The response model was valid in analyzing and predicting the extent of EA due to its higher fitting degree and less experimental error. Under the optimal conditions, the EA reached 66.8 and the emulsification stability (ES) reached 29.80 min. Compared with the previously unmodified SPI, the EA and the ES were increased by 134.4% and 61.6%, respectively.
  Number of references:28
  Main heading:Emulsification
  Controlled terms:Microwave generation  -  Microwave power transmission  -  Optimization  -  Phosphorylation  -  Proteins  -  Sodium  -  Surface analysis
  Uncontrolled terms:Central composite rotatable design  -  Evaluation index  -  Experimental errors  -  Fitting degree  -  Microwave power  -  Microwave-assisted  -  Optimal conditions  -  Optimized conditions  -  Response model  -  Response surface analysis   -  Sodium tripolyphosphate  -  Soy protein isolates  -  Soybean meal  -  Soybean proteins
  Classification code:951 Materials Science  -  921.5 Optimization Techniques  -  804.1 Organic Compounds  -  802.3 Chemical Operations  -  802.2 Chemical Reactions  -  714.2 Semiconductor Devices and Integrated Circuits  -  706.1.1 Electric Power Transmission  -  549.1 Alkali Metals  -  423 Non Mechanical Properties and Tests of Building Materials
  Database:Compendex

30. Accession number:20114214431589
  Title:Development of down flow tube reactor for bio-oil production from biomass flash pyrolysis
  Authors:Li, Zhihe1 ; Bai, Xueyuan1 ; Li, Yongjun1 ; Yi, Weiming1 
  Author affiliation:1  School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
  Corresponding author:Yi, W. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:116-119 115
  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 biomass powder heated by hot solid heat carrier (ceramic balls), an original down flow tube reactor (DFTR) for bio-oil production from biomass flash pyrolysis was developed. The structural design process of the critical parts was introduced in detail and the experiments were conducted to test the performance of each part of the DFTR, including the solid heat exchanger, the particle feeder, the down flow tube, the particle separator and the quencher. The results indicated that the temperature of the solid heat carrier fluctuated little and its feeding rate could be controlled precisely. The solid heat carrier and biomass char can be separated completely. The hollow-cone type nozzle is very suitable for quenching the pyrolyzed gaseous products which can atomize well as the nozzle diameter is 4.0 mm and the fluid flow pressure is 0.2 MPa. The pyrolyzed bio-oil yield recovering from agricultural residues reached to 43% as this type nozzle is used to quench the condensable vapor.
  Number of references:8
  Main heading:Biomass
  Controlled terms:Agricultural wastes  -  Nozzles  -  Pyrolysis  -  Quenching  -  Structural design  -  Tubes (components)
  Uncontrolled terms:Bio oil  -  Bio-oil yield  -  Biomass char  -  Ceramic balls  -  Critical parts  -  Feeding rate  -  Flash pyrolysis  -  Flow tube  -  Flow tube reactor  -  Gaseous products   -  Heat carriers  -  Nozzle diameter
  Classification code:408.1 Structural Design, General  -  537.1 Heat Treatment Processes  -  616.1 Heat Exchange Equipment and Components  -  631.1 Fluid Flow, General  -  802.2 Chemical Reactions  -  821.5 Agricultural Wastes
  Database:Compendex

31. Accession number:20114214431571
  Title:Influence of single cylinder deactivation on dynamic performances of internal combustion engine motion mechanisms
 
  Authors:Yang, Shouping1 ; Zhang, Fujun1 ; Huang, Ying1 ; Zhao, Changlu1 ; Ling, Qiang1 
  Author affiliation:1  School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
  Corresponding author:Zhang, F. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:8-13
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:In order to confirm cylinder deactivation schemes with preferable dynamic performances of internal combustion engine motion mechanisms, the flexible dynamic model of a V8 diesel engine was established, which coupled mechanisms such as cranktrain, timing-gears, and valvetrain. The dynamic models were validated by experimental data. Motion mechanisms dynamic simulations were conducted for single cylinder deactivation. The results revealed that angular displacement amplitude of crankshaft obviously increased when single cylinder activated, which mainly consisted of low orders rolling vibration, while the change to camshaft was negligible. Motion characteristics of valvetrain were deteriorated and mechanical load increased. Deactivated cylinders which were neighboring to the single or double crunodes positions of crankshaft, behaved better dynamic performances under high speed and low engine loads.
  Number of references:12
  Main heading:Engine cylinders
  Controlled terms:Combustion  -  Combustion equipment  -  Computer simulation  -  Crankshafts  -  Diesel engines  -  Dynamic models  -  Dynamics  -  Engines  -  Mechanisms
  Uncontrolled terms:Angular displacement  -  Coupled mechanisms  -  Coupling simulation  -  Crunodes  -  Dynamic performance  -  Engine load  -  Experimental data  -  Flexible dynamics  -  Internal combustion  -  Low order   -  Mechanical loads  -  Motion characteristics  -  Motion mechanisms  -  ON dynamics  -  Single cylinder deactivation  -  Valvetrain  -  Valvetrain systems
  Classification code:921 Mathematics  -  723.5 Computer Applications  -  612 Engines  -  931.1 Mechanics  -  601.3 Mechanisms  -  521.2 Combustors  -  521.1 Fuel Combustion  -  601.2 Machine Components
  Database:Compendex

32. Accession number:20114214431578
  Title:Numerical simulation for soil water movement at different infiltration heads
  Authors:Wang, Rui1 ; Sun, Xihuan1 ; Guo, Xianghong1 ; Ma, Juanjuan1 
  Author affiliation:1  College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  Corresponding author:Sun, X. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:45-49
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Based on the effect of infiltration head on soil water movement, the assumption of layered calculation was put forward. The model of soil water movement at different infiltration heads was established, and the finite difference method was used to solve it. A series of soil column infiltration experiments at different infiltration heads were conducted to verify the model. The computational soil water contents derived from the model was in accordance with the experimental results, the maximum relative error was 4.8%. It indicates that the mathematic model of soil water movement at different infiltration heads is correct and solving of the model with the finite difference method is feasible.
  Number of references:17
  Main heading:Geologic models
  Controlled terms:Computer simulation  -  Finite difference method  -  Numerical methods  -  Seepage  -  Soil mechanics  -  Soil moisture
  Uncontrolled terms:Mathematic model  -  Maximum relative errors  -  Soil column  -  Soil water content  -  Soil water movement
  Classification code:407 Maritime and Port Structures; Rivers and Other Waterways  -  441 Dams and Reservoirs; Hydro Development  -  481.1 Geology  -  483.1 Soils and Soil Mechanics  -  723.5 Computer Applications  -  921.6 Numerical Methods
  Database:Compendex

33. Accession number:20114214431587
  Title:Numerical simulation and experiment on resistance loss of flap gate
  Authors:Yang, Fan1 ; Zhou, Jiren1 ; Liu, Chao1 
  Author affiliation:1  College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
  Corresponding author:Liu, C. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:108-112 44
  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 resistance characteristics of flap gate, the experimental and numerical simulation studies of resistance loss of flap gate were performed. Outlet circulation of the pump has great influence on resistance loss of flap gate, so the resistance loss and the square value of flow do not show the proportional relationship. In the conditions of the same flow, efficiency decreased value of pump system was negative correlated with the open angle of flap gate. On the basis of numerical simulation, flow patterns of the outlet were analyzed with and without flap gate under designed operating condition. The resistance loss of flap gate was predicted. A good agreement was achieved between the predicted data and the experimental data under designed operating condition.
  Number of references:8
  Main heading:Computer simulation
  Controlled terms:Experiments  -  Pumps
  Uncontrolled terms:Experimental data  -  Flap gate  -  Flap gates  -  Numerical simulation studies  -  On-resistance  -  Operating condition  -  Pump system  -  Resistance characteristics  -  Resistance loss
  Classification code:618.2 Pumps  -  723.5 Computer Applications  -  901.3 Engineering Research
  Database:Compendex

34. Accession number:20114214431603
  Title:Kinematics analysis of RRR-UPRR-RPUR spherical parallel manipulator
  Authors:Zhang, Fan1 ; Zhang, Dan2, 3 ; Yang, Jianguo3 
  Author affiliation:1  School of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
                 2  Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa L1H7K4, Canada
                 3  College of Mechanical Engineering, Donghua University, Shanghai 201620, China
  Corresponding author:Zhang, F. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:202-206 224
  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:An RRR-UPRR-RPUR parallel manipulator which can achieve spherical motion around fixed point was presented. The manipulator has three rotational degree-of-freedom (DOF), of which two rotational DOFs are independent and could be actuated by single actuator. The screw formulations of kinematic joints under ordinary configuration were established, which was employed to determine the three continues rotational DOF of the manipulator. Then, the kinematics of moving-platform and adjacent part were deduced, and the analytical algorithm of direct kinematics of the mechanism was established. Finally, the theoretical results are verified by the motion simulation of the prototype mechanism.
  Number of references:17
  Main heading:Manipulators
  Controlled terms:Degrees of freedom (mechanics)  -  Kinematics  -  Mechanisms  -  Screws  -  Spheres
  Uncontrolled terms:Analytical algorithms  -  Decoupled motion  -  Direct kinematics  -  DOF analysis  -  Fixed points  -  Kinematic joints  -  Kinematics analysis  -  Motion simulations  -  Parallel manipulators  -  Screw theory   -  Single actuators  -  Spherical motion  -  Spherical parallel manipulator  -  Spherical parallel mechanism  -  Theoretical result
  Classification code:601.3 Mechanisms  -  605 Small Tools and Hardware  -  631 Fluid Flow  -  731.5 Robotics  -  931.1 Mechanics
  Database:Compendex

35. Accession number:20114214431608
  Title:Multi-stage CNC incremental forming path generation based on surface zoning
  Authors:Zhu, Hu1 ; Liu, Zhijun1 ; Fu, Jianhui1 
  Author affiliation:1  College of Mechanical and Electrical Engineering, Shenyang Aerospace University, Shenyang 110136, China
  Corresponding author:Zhu, H. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:230-234
  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 realize the efficient forming of difficulty forming surfaces such as vertical wall, the method of multi-stages CNC incremental forming with individuation was proposed based on the surface zoning for the triangular mesh model, and the generation method of the path which needed by each stage forming in the surface zone was studied. A triangular mesh surface zoning approach based on formability was given. Moreover a strategy to generate multi-stage spiral forming tool path for each surface area by offset was presented. The case studies indicated that the proposed method could realize surface zoning and generate smooth and successive multi-stage spiral forming path for the corresponding surface zones.
  Number of references:15
  Main heading:Zoning
  Uncontrolled terms:Forming tools  -  Generation method  -  Incremental forming  -  Multi-stage  -  Multi-stage forming  -  Path generation  -  Surface area  -  Surface zones  -  Triangular meshes  -  Vertical wall
  Classification code:403.2 Regional Planning and Development
  Database:Compendex

36. Accession number:20114214431586
  Title:Optimum combination of structure parameters of cross flow fans
  Authors:Pang, Youxia1 ; Tang, Yong1 ; Liang, Liang1 ; Zhu, Zongming1 
  Author affiliation:1  Department of Mechanical and Electrical Engineering, Changsha University, Changsha 410003, China
  Corresponding author:Pang, Y. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:102-107
  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 three-dimensional internal flow field of cross flow fans with 30° twisted blade was simulated with computational fluid dynamic (CFD) method. The influence of each structure parameters (volute case gap, volute throat gap, internal circumferential angle of the blade, external circumferential angle of the blade, blade numbers, the ratio of internal diameter to external diameter of the impeller or twisted angle of the blade) on the volume flow rate of the cross flow fan outlet was numerically researched. The optimal combination of seven structural parameters with the optimal performance of the cross flow fans was obtained by the orthogonal design method. Under the constant impeller external diameter and rotating speed, the optimal combination of structural parameters are as follows: volute case gap Εc is 1 mm, the volute throat gap Εt is 2 mm, the internal circumferential angle of the blade α is 90°, the external circumferential angle of the blade β is 20°, the blade numbers n is 30, the ratio of internal diameter to external diameter of the impeller γ is 0.75, and the twisted angle of the blade θ is 90°. It is obtained that the volume flow rate of the outlet of the optimized cross flow fan was increased by 25.2%. By means of the detection device of cross flow fan's performance parameters, the air outlet average velocities of the optimized and original cross flow fans were experimentally tested under the constant impeller external diameter and different impeller rotating speeds. The experimental result showed the air outlet average velocities of the optimized cross flow fan were increased by 4.6%. The theoretical calculation results were consistent with the experimental test results.
 Number of references:10
 Main heading:Computational fluid dynamics
 Controlled terms:Axial flow  -  Flow rate  -  Impellers  -  Rotating machinery  -  Rotation  -  Structural design  -  Structural optimization  -  Well pumps
 Uncontrolled terms:Average velocity  -  Blade numbers  -  Circumferential angles  -  Cross flow fan  -  Detection device  -  Experimental test  -  Internal diameters  -  Internal flow field  -  Optimal combination  -  Optimal performance   -  Optimum combination  -  Orthogonal design  -  Orthogonal design method  -  Performance parameters  -  Rotating speed  -  Structural parameter  -  Structure parameter  -  Theoretical calculations  -  Volume flow rate
 Classification code:921.6 Numerical Methods  -  921.5 Optimization Techniques  -  631 Fluid Flow  -  601.2 Machine Components  -  601.1 Mechanical Devices  -  446.1 Water Supply Systems  -  408.1 Structural Design, General
 Database:Compendex

37. Accession number:20114214431592
  Title:Maximum power point tracking compound control strategy of MW level wind turbines
  Authors:Tong, Yibin1 ; Liu, Zhan2 ; Liu, Yuanyuan3 
  Author affiliation:1  School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
                 2  School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China
                 3  Siemens Ltd. China, Beijing 100102, China
  Corresponding author:Tong, Y. ([email protected]) 
 
 Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:9
 Issue date:September 2011
 Publication year:2011
 Pages:129-132
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
 Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
 Abstract:Dynamic valid wind speed of aerodynamic characteristic wind wheel was evaluated based on BP neural network. According to the evaluated valid wind speed dynamically and combined direct wind speed control with indirectly wind control, a new complex control method was proposed. With this complex control method, dynamic characteristics of MPPT under indirect wind speed control can be obviously improved when wind speed evaluation is estimated with error. Besides, it can also follow the fluctuations of wind to increase the efficiency of wind power.
 Number of references:9
 Main heading:Neural networks
 Controlled terms:Aerodynamics  -  Optical flows  -  Pumps  -  Speed  -  Speed control  -  Speed regulators  -  Wind effects  -  Wind power  -  Wind turbines
 Uncontrolled terms:Aerodynamic characteristics  -  BP neural networks  -  Complex control method  -  Compound control  -  Dynamic characteristics  -  Maximum Power Point Tracking  -  Wind speed  -  Wind speed estimate
 Classification code:741.1 Light/Optics  -  731.3 Specific Variables Control  -  723.4 Artificial Intelligence  -  931.1 Mechanics  -  651.1 Aerodynamics, General  -  615.8 Wind Power (Before 1993, use code 611 )  -  443.1 Atmospheric Properties  -  618.2 Pumps
 Database:Compendex

38. Accession number:20114214431591
  Title:Physical and chemical characterization of biomass crushed straw
  Authors:Tian, Yishui1 ; Yao, Zonglu1 ; Ouyang, Shuangping1, 2 ; Zhao, Linxin1 ; Meng, Haibo1 ; Hou, Shulin2 
  Author affiliation:1  Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, Beijing 100125, China
                 2  College of Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Meng, H. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:124-128 145
  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 physical and chemical characterization of biomass crushed straw (practical size from 5 mm to 30 mm) which from major grain producing areas was studied and analyzed according to the biomass standards and methods introduced here. The results showed physical and chemical characterization of corn straw from different areas has significant difference. For northeast area, the static angle of repose was maximum, the ash was minimum and bulk density was 17.25%, lower than that of other area. The physical and chemical characterization of different straw from the same area has significant difference, too. The dynamic external friction angle of corn and cotton straw was much higher than that of other crop straw, for bulk density, the soybean, cotton and peanut straw was maximum. The model of net calorific value and proximate analysis was developed. The verification results showed that the largest regression coefficient P value was less than 0.05.
  Number of references:15
  Main heading:Chemical analysis
  Controlled terms:Biomass  -  Briquetting  -  Characterization  -  Cotton  -  Crops
  Uncontrolled terms:Angle of repose  -  Bulk density  -  Chemical characterization  -  Corn straws  -  Crushed straw  -  Friction angles  -  Net calorific value  -  P-values  -  Physical and chemical characterization  -  Proximate analysis   -  Regression coefficient  -  Verification results
  Classification code:524 Solid Fuels  -  801 Chemistry  -  804 Chemical Products Generally  -  821.4 Agricultural Products  -  821.5 Agricultural Wastes  -  951 Materials Science
  Database:Compendex

39. Accession number:20114214431582
  Title:Influence of rib structure in double-volute centrifugal pumps on the impeller radial force
  Authors:Xiao, Ruofu1 ; Lü, Tengfei1 ; Wang, Fujun1 
  Author affiliation:1  College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Xiao, R. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:85-88
  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:Double-volute casings were introduced to reduce the radial force that is inherent in single-volute designs. A general three-dimensional computational fluid dynamics (CFD) simulation of a double-volute centrifugal pump was presented to predict hydraulic performance and impeller radial force. By using the shear stress transport (SST) k-ω turbulent model, the simulation results in the form of characteristic curves were compared with the experimental data. The result presented that the head and efficiency of the original double-volute pump drop were 21.8% and 41.3% respectively at design point due to the failed dividing rib (splitter) in the volute casing. Thus, with the aim to analyze the effects of rib structure on pumps, three optimized rib schemes were designed to reduce the impeller radial force and keep the hydraulic performance. Three factors were considered in the rib design: start point, end point and curve equation. According to the steady numerical simulation result in each optimized scheme by CFD, No.2 scheme reduced about half of the radial force while keeping the hydraulic performance. A method in designing the rib structure for double-volute centrifugal pumps was provided.
  Number of references:7
  Main heading:Pumps
  Controlled terms:Centrifugal pumps  -  Computational fluid dynamics  -  Computer simulation  -  Hydraulic machinery  -  Hydraulics  -  Impellers  -  Optimization  -  Pumping plants  -  Structural design
  Uncontrolled terms:Characteristic curve  -  Computational fluid  -  Computational fluid dynamics simulations  -  Design points  -  Double-volute casing  -  End points  -  Experimental data  -  Hydraulic performance  -  Radial forces  -  Rib structure   -  Shear-stress transport  -  Simulation result  -  Start point  -  Turbulent models  -  Volute casings
  Classification code:723.5 Computer Applications  -  632.2 Hydraulic Equipment and Machinery  -  632.1 Hydraulics  -  921.5 Optimization Techniques  -  618.2 Pumps  -  446 Waterworks  -  408.1 Structural Design, General  -  601.2 Machine Components
  Database:Compendex

40. Accession number:20114214433363
  Title:Design of determinator for specific yield
  Authors:Zhao, Yanfeng1 ; Wang, Zhengzhong1 ; Liu, Jiliang1 
  Author affiliation:1  College of Water Resources and Architectural Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
  Corresponding author:Zhao, Y. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:69-73
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Because the current methods for determining specific yield of undisturbed soil are not precise, aimed at designing a new determinator and proposing a new test idea and its calculation method, the research was conducted. First, the structure of a new determinator and its operational process for specific yield were proposed. Second, based on the analysis of infiltration and water release process of soil and the definition of specific yield, the formula presented by physical property parameters of medium and penetration liquid was obtained for computation of specific yield. The analysis results and examples indicated that the determination process of the determinator designed is simple. The seepage process was approximately the same as the practical flow pattern, and the formula has high accuracy.
  Number of references:13
  Main heading:Soil testing
  Controlled terms:Groundwater  -  Groundwater resources  -  Seepage  -  Soils
  Uncontrolled terms:Analysis results  -  Calculation methods  -  Determinator  -  Operational process  -  Specific yield  -  Undisturbed soils  -  Water release
  Classification code:407 Maritime and Port Structures; Rivers and Other Waterways  -  441 Dams and Reservoirs; Hydro Development  -  444.2 Groundwater  -  483.1 Soils and Soil Mechanics
  Database:Compendex

41. Accession number:20114214431574
  Title:Particulate emissions of engine fuelled with biodiesel-diesel blends using thermo-gravimetric analysis
  Authors:Ma, Zhihao1 ; Zhang, Xiaoyu1 ; Wang, Xin1 ; Xu, Bin1 ; Wu, Jian1 
  Author affiliation:1  College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China
  Corresponding author:Ma, Z. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:26-29
  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:Particulate emissions of engine fuelled different proportions of biodiesel-diesel blends were collected under different fuel supplying advanced angles and different operating conditions. The change of volatile organic fractions in particulate emissions was analyzed using thermo-gravimetric analytical instrument when temperature increased. The results showed that under the tested conditions, compared to the proportions of biodiesel-diesel blends, the change of fuel supplying advanced angle had little influence on the amount of volatile organic fraction in the particulate emissions. The volatile organic fraction in the particulate emissions increased with the increase of the proportions of biodiesel in the blends; volatile organic fractions peaked at the evaporation temperature of 150-180°C, and with the percentage of biodiesel increased, the volatile organic fractions were more concentrated in the temperature range with the increase of percentage of biodiesel.
  Number of references:12
  Main heading:Particulate emissions
  Controlled terms:Biodiesel  -  Gravimetric analysis
  Uncontrolled terms:Analytical instrument  -  Evaporation temperature  -  Operating condition  -  Temperature range  -  Volatile organic fractions
  Classification code:451.1 Air Pollution Sources  -  523 Liquid Fuels  -  801 Chemistry
  Database:Compendex

42. Accession number:20114214431585
  Title:Evaluation and optimization of variable rate complete fluidic sprinkler vice nozzle
  Authors:Liu, Junping1 ; Yuan, Shouqi1 ; Li, Hong1 ; Chen, Chao1 ; Wei, Yangyang1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Yuan, S. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:98-101
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:According to the fact that water distribution of variable rate complete fluidic sprinkler is not uniformity under different pressures, 20PXH variable rates complete sprinkler was taken as the research model, and eight different schemes of vice nozzles were designed and analyzed by jet water theory. The water distribution was measured. The method of analyzing the test data by different sprinkler irrigation intensities under different pressures was applied, and the best scheme was obtained. The test for water distribution under different pressures and baffle angles was carried out. Taking maximal uniformity coefficient as the function objective, and the range of baffle angle and uniformity coefficient as the constraint conditions, the comprehensive evaluation function of variable rates of the complete sprinkler uniformity was created for the first time. The optimum baffle angle is 21.2° by derivative the function.
  Number of references:8
  Main heading:Sprinkler systems (irrigation)
  Controlled terms:Function evaluation  -  Nozzles  -  Optimization  -  Water supply systems
  Uncontrolled terms:Complete fluidic sprinkler  -  Evaluation  -  Optimization model  -  Variable spraying  -  Vice nozzle
  Classification code:446.1 Water Supply Systems  -  631.1 Fluid Flow, General  -  821.1 Agricultural Machinery and Equipment  -  921.5 Optimization Techniques  -  921.6 Numerical Methods
  Database:Compendex

43. Accession number:20114214431602
  Title:Evaluation method of individualized products based on case reasoning
  Authors:Bao, Zhiyan1, 2 ; Xiao, Gang1 ; Gao, Fei1 ; Ruan, Shufeng3 
  Author affiliation:1  College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310032, China
                 2  Department of Mechanical and Electronic Engineering, Zhejiang Water Conservancy and Hydropower College, Hangzhou 310018, China
                 3  Zhejiang Zhongqing Lifting Machinery Co., Ltd, Shaoxing 311800, China
  Corresponding author:Bao, Z. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:197-201 196
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:The problems of the individualized product evaluation were formalized, and a product evaluation model with algorithms based on case reasoning was proposed. The case library was divided into groups through fuzzy clustering analysis, and different groups had different dynamic weights by mathematical calculation under the constraints of experience rules. The program flow chart of the algorithm of evaluation parameter weights optimization was presented. Euclidean distance with weights was adopted to search a similar instance. The final result of product evaluation was adjusted based on the similar instance. The proposed methodology demonstrated the effectiveness in an instance of the evaluation of crane products.
  Number of references:12
  Main heading:Case based reasoning
  Controlled terms:Algorithms  -  Optimization
  Uncontrolled terms:Case library  -  Case reasoning  -  Dynamic weight  -  Euclidean distance  -  Evaluation Method  -  Evaluation parameters  -  Fuzzy clustering analysis  -  Individualized products  -  Mathematical calculations  -  Product evaluation   -  Program flow  -  Self-clustering  -  Weight optimization
  Classification code:723 Computer Software, Data Handling and Applications  -  723.4 Artificial Intelligence  -  921 Mathematics  -  921.5 Optimization Techniques
  Database:Compendex

44. Accession number:20114214431600
  Title:Odor emissions and impact factors of fattening pig rooms with different floor systems
  Authors:Wang, Kaiying1 ; Wei, Bo1 ; Ying, Hongcang2 ; Luo, Haojie2 
  Author affiliation:1  School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
                 2  Zhejiang Environmental Monitoring Center, Hangzhou 310012, China
  Corresponding author:Wang, K. ([email protected]) 
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:42
  Issue:9
  Issue date:September 2011
  Publication year:2011
  Pages:186-190 161
  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:Odor samples from three fattening rooms with different floor systems were collected and analyzed by using triangle odor bag method under cool and warm weather. It showed that there were significantly positive correlations between odor concentration and indoor temperature and pig weight (p < 0.05). The correlation was not significant between odor concentration and relative humidity (p > 0.1). Significant differences were found in the three pig rooms with different floor systems (p < 0.05). Odor concentration was highest in the pig room with traditional concrete floor system; full-slatted floor system was the second, and the lowest for deep-litter fermentation system. The results indicated that deep-litter system was effective for odor mitigation. Odor emission factors from the deep-litter room, fully-slatted floor room, and concrete floor room were (3.39 ± 3.33), (3.70 ± 1.31) and (4.33 ± 2.39) OU/(m2 · s), respectively.
  Number of references:23
  Main heading:Floors
  Controlled terms:Concentration (process)  -  Concrete construction  -  Mammals  -  Odor control
  Uncontrolled terms:Concrete floor  -  Emission factors  -  Fattening pig rooms  -  Fermentation systems  -  Floor systems  -  Impact factor  -  Indoor temperature  -  Odor concentration  -  Odor concentrations  -  Odor emission   -  Positive correlations
  Classification code:402 Buildings and Towers  -  405 Construction Equipment and Methods; Surveying  -  412 Concrete  -  445.1 Water Treatment Techniques  -  802.3 Chemical Operations  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control
  Database:Compendex
 
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