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2012年第43卷第7期共收录42篇
1. Accession number:20123715423385
  Title:Global sensitivity analysis of runoff parameters of SWMM model
  Authors:Sun, Yanwei1 ; Ba, Duoduo2 ; Wang, Wenchuan1 ; Jiang, Tisheng3 ; Wang, Fuqiang1 
  Author affiliation:1  Department of Hydraulic Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
                 2  College of Water Resources and Architecture Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
                 3  Beijing Water Environment Monitoring Center, Beijing 100089, China
   Corresponding author:Ba, D. (Baduoduo59@tom.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:42-49
  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 practicability analysis of SWMM model parameters in the calibration process, four parameters of subcatchment slope, subcatchment width, Manning coefficient and depression depth on pervious area and three infiltration parameters were selected. Two popular infiltration models of Horton and Green-Ampt were examined respectively. Global sensitivity analysis method of Morris was used. Flow metrics of total rainfall depth and peak discharge were simulated for single rainfall events with different rainfall types and return periods while runoff coefficient was examined for the long-term rainfall data. Main results were: sensitivity analysis results for T1 and T2 rainfall events indicated great differences and T2 rainfall event with small return period was not suitable for parameters calibration; for Horton model, peak discharge of large T1 rainfall can be used for calibrating subcatchment width and slope while total runoff of large T2 can be used for calibrating infiltration parameters; for Green-Ampt model, peak discharge of small T1 rainfall can be used to calibrate subcatchement width and that of large T2 rainfall can be used to calibrate minimum infiltration rate and water deficiency; for the runoff coefficient, sensitivity analysis results of the two methods are similar.
  Number of references:17
  Main heading:Rain
  Controlled terms:Calibration  -  Runoff  -  Sensitivity analysis
  Uncontrolled terms:Global sensitivity  -  Green-Ampt model  -  Model calibration  -  Morris method  -  SWMM
  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  -  921 Mathematics  -  444.1 Surface Water  -  443.3 Precipitation
  DOI:10.6041/j.issn.1000-1298.2012.07.008
  Database:Compendex

2.  Accession number:20123715423388
  Title:Correlation between percentage vegetation cover and hyperspectral characteristics of winter wheat
  Authors:Yao, Fuqi1 ; Cai, Huanjie1 ; Wang, Haijiang2 ; Zhang, Qian1 ; Wang, Jian1 
  Author affiliation:1  Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas, Ministry of Education, Northwest A and F University, Yangling, Shaanxi 712100, China
                 2  Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
 Corresponding author:Cai, H. (caihj@nwsuaf.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:156-162
  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 winter wheat PVC estimation models based on canopy spectral characteristic parameters were established in different growth periods. The results showed that the winter wheat canopy hyperspectral reflectance in the visible light decreased from reviving to heading stages, then increased from heading to maturing stages, while in the near infrared band, it increased from reviving to heading stages, decreased from heading to maturing stages. Under different crop densities, hyperspectral reflectance of winter wheat canopy with suitable for water supply in the visible light was less than that of slight water deficit and severely water deficit in order, but in the near infrared band, it had opposite conditions. There were good relationships between winter wheat PVC and the spectral characteristic parameters of traditional and new spectral characteristic parameters in different growth periods. Compared with the models of winter wheat PVC which used the parameters of traditional spectrum characteristic as the independent variables, the models based on the kurtosis of green peak can improve the estimation accuracy of winter wheat PVC.
  Number of references:20
  Main heading:Crops
  Controlled terms:Infrared devices  -  Optical correlation  -  Parameter estimation  -  Reflection  -  Vegetation  -  Water supply
  Uncontrolled terms:Canopy  -  Estimation models  -  Growth period  -  Hyper-spectral characteristics  -  Hyperspectral reflectance  -  Independent variables  -  Near infrared band  -  Spectral characteristics  -  Spectrum characteristic  -  Vegetation cover   -  Visible light  -  Water deficits  -  Winter wheat
  Classification code:446.1 Water Supply Systems  -  731.1 Control Systems  -  741.1 Light/Optics  -  741.3 Optical Devices and Systems  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  821.4 Agricultural Products
  DOI:10.6041/j.issn.1000-1298.2012.07.029
  Database:Compendex

3.  Accession number:20123715423386
  Title:Anti-scourability of soil under different land use types in dry valley of Minjiang River
  Authors:Fu, Yaolong1 ; Zhang, Xingchang2  
  Author affiliation:1  College of Resources and Environment, Northwest A and F University, Yangling, Shaanxi 712100, China
                 2  State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
  Corresponding author:Zhang, X. (zhangxc@ms.iswc.ac.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:50-55
  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 provide scientific and theoretical basis for control of water and soil loss of slope, soil anti-scourability for different land uses (shrub land, waste grassland, cultivated land and bare land) in Longbagou basin, the dry valley of upper Minjiang River was studied by the flume experiment, and soil erosion and sediment yield characteristic and its influencing factors were discussed. The results showed that the anti-scourability of surface soil under different land use patterns increased and assumed wavy variation along with scouring time; the anti-scourability followed the order of waste grassland, wheat land, shrub land, corn land, bare land; soil anti-scourability values and silt content has a significant negative correlation (r= -0.992, P<0.01), and sand content has a significant positive correlation (r=0.925, P<0.01).
  Number of references:15
  Main heading:Soil conservation
  Controlled terms:Erosion  -  Experiments  -  Land use  -  Landforms  -  Rivers  -  Soils
  Uncontrolled terms:Bare lands  -  Cultivated lands  -  Different land use types  -  Dry valley  -  Flume experiment  -  Influencing factor  -  Land use pattern  -  Minjiang River  -  Negative correlation  -  Positive correlations   -  Sand content  -  Scouring experiments  -  Sediment yields  -  Silt contents  -  Slope erosion  -  Soil erosion  -  Soil loss  -  Surface soil  -  Theoretical basis
  Classification code:901.3 Engineering Research  -  483.1 Soils and Soil Mechanics  -  483 Soil Mechanics and Foundations  -  481.1 Geology  -  407.2 Waterways  -  407 Maritime and Port Structures; Rivers and Other Waterways  -  403 Urban and Regional Planning and Development
  DOI:10.6041/j.issn.1000-1298.2012.07.009
  Database:Compendex

4.  Accession number:20123715423387
  Title:Effect of pretreated wheat straw on soil aggregate and water-holding capacity within low suctions in loess soil
  Authors:Wang, Zengli1 ; Feng, Hao2 ; Fang, Yuan1 
  Author affiliation:1  Institute of Water Saving Agriculture in Arid Areas of China, Northwest A and F University, Yangling, Shaanxi 712100, China
                 2  Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
  Corresponding author:Feng, H. (nercwsi@vip.sina.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:56-62 72
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:A contrast study on effect of powdered, aminated straw with or without inorganic soil conditioner (calcium sulfate) on soil structure and water-holding capacity in low suction section was made through soil column incubation test. The results showed that the pretreated straw significantly improved soil structure stability, decreased soil structure fractal dimension. Therein the soil with comminuted and aminated straw had a slow acting to improve soil stability. Different pretreatment of straw mixed with soil could make soil porosity connectivity poor in the early stages, and then better with the straw decomposition later. Therein the soil with long straw always kept worse soil porosity than soils with the powdered straw. Furthermore there was a significantly linear correlation between soil aggregate fractal dimension and soil porosity fractal dimension in low suction section. That quantitively explained the effect of the pretreated straw on soil structure and water-holding capacity in low suction section of soil.
  Number of references:21
  Main heading:Soils
  Controlled terms:Aggregates  -  Amination  -  Comminution  -  Fractal dimension  -  Grinding (comminution)  -  Porosity  -  Straw
  Uncontrolled terms:Calcium sulfate  -  Contrast studies  -  Linear correlation  -  Loess soils  -  Pre-Treatment  -  Soil aggregate  -  Soil column  -  Soil Porosity  -  Soil stability  -  Soil structure   -  Water holding capacity  -  Wheat straws
  Classification code:931.2 Physical Properties of Gases, Liquids and Solids  -  921 Mathematics  -  821.5 Agricultural Wastes  -  802.3 Chemical Operations  -  802.2 Chemical Reactions  -  483.1 Soils and Soil Mechanics  -  406 Highway Engineering
  DOI:10.6041/j.issn.1000-1298.2012.07.010
  Database:Compendex

5.  Accession number:20123515381398
  Title:Algorithm based on image processing technology to generate navigation directrix in orchard
  Authors:Feng, Juan1, 2 ; Liu, Gang1 ; Si, Yongsheng2 ; Wang, Shengwei1 ; He, Bei1 ; Ren, Wen1 
  Author affiliation:1  Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China
                 2  College of Information Science and Technology, Agricultural University of Hebei, Baoding 071001, China
 
  Corresponding author:Liu, G. (pac@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:185-189 184
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:An algorithm based on image processing technology was proposed for generating navigation directrix in orchard of complex circumstance. Image of R-B component was binarized by 2-D maximum between-cluster variance. A region of interest was detected by horizontal projection method to extract tree trunks. Crossing points between tree and ground were obtained by scanning the trunks and classified into different clusters in terms of their neighboring relation. Least square method was used for detecting two border lines, center points of crossing points between two border lines were extracted to generate navigation directrix for agricultural robot. The experimental results under various scene conditions showed that the algorithm could generate navigation directrix accurately, the accuracy was more than 90.7% which showed a good noise robust; the average processing time of a 640×480 pixels image was less than 119 ms and met the need of real-time.
  Number of references:14
  Main heading:Navigation
  Controlled terms:Algorithms  -  Forestry  -  Geometry  -  Image processing  -  Least squares approximations  -  Orchards
  Uncontrolled terms:Agricultural robot  -  Center points  -  Crossing point  -  Directrix  -  Image processing technology  -  Least square methods  -  Processing time  -  Projection method  -  Region of interest
  Classification code:716.3 Radio Systems and Equipment  -  741 Light, Optics and Optical Devices  -  821.0 Woodlands and Forestry  -  821.3 Agricultural Methods  -  921 Mathematics  -  921.6 Numerical Methods
  DOI:10.6041/j.issn.1000-1298.2012.07.034
  Database:Compendex

6.  Accession number:20123515381405
  Title:Dual-layer optimization for transmission errors of spiral bevel gears
  Authors:Liu, Guanglei1 ; Liu, Zeliang1 
  Author affiliation:1  School of Mechatronics, Northwestern Polytechnical University, Xi'an 710072, China
Corresponding author:Liu, G. (liuguang@nwpu.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:223-227 222
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:In order to narrow the margin between the predetermined symmetrical parabola transmission error curve (TEC) and that of tooth contact analysis (TCA), a dual-layer method was proposed for the TEC optimization of spiral bevel gears. The method consisted of inner and outer layer optimizations which were conducted in turn. In inner layer optimization, pinion machine-tool settings were obtained based on local synthesis and TCA was carried out which gave TEC and contact pattern. An agreement objective was set up. The difference between TCA TEC and that of the theoretical one was diminished in least square sense to ensure agreement by tuning the four higher order modified roll coefficients in the relative motion formula linking the pinion and its cradle. In outer layer optimization, a symmetrical optimization objective was set up. The number of meshing points on the left and right branches of TCA TEC has been regulated until equal to each other to ensure symmetry by adjusting the displacement of the mean contact point along tooth depth. The method brought up is validated for a pair of spiral bevel gears. The results show that the method corresponding to the symmetry and agreement is indeed effective for TEC optimization of spiral bevel gears.
  Number of references:14
  Main heading:Optimization
  Controlled terms:Bevel gears  -  Error detection  -  Spur gears
  Uncontrolled terms:Dual layer  -  Local synthesis  -  Spiral bevel gears  -  Tooth contact analysis  -  Transmission error
  Classification code:601.2 Machine Components  -  721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory  -  921.5 Optimization Techniques
  DOI:10.6041/j.issn.1000-1298.2012.07.041
  Database:Compendex

7.  Accession number:20123515381397
  Title:Optimal path planning for lane changing of wheeled mobile robot
  Authors:An, Kai1 ; Li, Xiangyang1 
  Author affiliation:1  Shandong Aerospace Electro-Technology Institute, Yantai 264003, China
  Corresponding author:An, K. (ankai2007@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:179-184
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:In order to change the lane of a weeding robot to the navigation line, a visual navigation system and two reference frames were established, some relative navigation and measure algorithms were put forward. According to the condition whether robot's moving direction were parallel with the navigation line or not, two different paths for lane changing were put forward and proved to be the optimal lane changing paths after the minimal turning radius was restricted. The corresponding control process and some calculation formulae about pivotal points and indispensable data related to the optimal paths were given. The two optimal paths planning methods for lane changing can be applied to any vehicle and robot with front wheel steering.
  Number of references:11
  Main heading:Optimization
  Controlled terms:Motion planning  -  Navigation systems  -  Robot programming  -  Robots
  Uncontrolled terms:Control process  -  Front-wheel steering  -  Lane changing  -  Moving direction  -  Optimal path planning  -  Optimal paths  -  Planning method  -  Reference frame  -  Relative navigation  -  Turning radius   -  Visual Navigation  -  Wheeled mobile robot  -  Wheeled robot
  Classification code:434.4 Waterway Navigation  -  731.5 Robotics  -  921.5 Optimization Techniques
  DOI:10.6041/j.issn.1000-1298.2012.07.033
  Database:Compendex

8.  Accession number:20123515381404
  Title:Radial rigidity identification of support point for ball screw based on the principle of initial parameter
  Authors:Hu, Feng1 ; Wu, Bo2 ; Shi, Tielin2 
  Author affiliation:1  School of Mechanical Science and Engineering, Wuhan Textile University, Wuhan 430073, China
                 2  School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  Corresponding author:Hu, F. (wuhanhufeng@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:217-222
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:The principle of initial parameter method to establish the initial parameter matrix equation for force and displacement of ball screw was explored. The structural characters, including boundary condition, force balance and displacement compatibility in support point were used to achieve initial parameter values. As a result, force and displacement of every point on ball screw could be obtained. Meanwhile, an identification method of the radial rigidity of support point was put forward. The identification models of radial rigidity were built by analyzing the amplitude changes of ball screw under some load affection employing the knowledge of mechanical vibration and material mechanics. The results are in good agreement with the results obtained by the available experiments.
  Number of references:10
  Main heading:Identification (control systems)
  Controlled terms:Ball screws  -  Matrix algebra  -  Parameter estimation  -  Rigidity  -  Screws
  Uncontrolled terms:Displacement compatibility  -  Force balances  -  Identification method  -  Identification model  -  Initial parameter  -  Material mechanics  -  Radial rigidity  -  Structural character
  Classification code:605 Small Tools and Hardware  -  731.1 Control Systems  -  732.1 Control Equipment  -  921.1 Algebra  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2012.07.040
  Database:Compendex

9.  Accession number:20123515381387
  Title:Pollutant emission optimization of boiler burning waste mixed with coal and straw
  Authors:Li, Dazhong1 ; Wang, Chenying1 ; Lou, Yun2 
  Author affiliation:1  Department of Automation, North China Electric Power University, Baoding 071003, China
                2  Suizhou Power Supply Company, Hubei Electric Power Company, Suizhou 441300, China
  Corresponding author:Li, D. (dzli21cn@126.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:117-123
  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 actual operation data from a mixed waste fired power plant in Shanxi province, the model of pollutant emission process of boiler burning waste, coal and straw was established. Validation showed the model can better simulate the process of mixed fuel boiler pollutants emissions. The multi-objective optimization function of flue-gas pollutants emission was designed and the Pareto optimal solution set was found. According to the engineering condition of dioxins could be broken down when the mixed fired temperature was in the range of 850-900°C, the efficient solution subset of boiler mixed burning operating condition that emission values could satisfy the engineering requirements was further selected from Pareto optimal solution set. The subset showed that when the temperature was higher than 850°C, with appropriate increase of the blending amount of coal and temperature, the formation of dioxins of boiler side exit has been significantly reduced, the minimum was 0.012 8 ngTEQ/m3, far better than the national standard value of 1.0 ngTEQ/m3 of eventually allowed emissions gas and test value 0.026 ngTEQ/m3 of the on-site gas after purification. Moreover, the other pollutant emission value is also much lower than the actual test value of side exit of on-site boiler.
  Number of references:21
  Main heading:Boilers
  Controlled terms:Air purification  -  Blending  -  Coal  -  Coal combustion  -  Gas emissions  -  Optimal systems  -  Optimization  -  Organic pollutants  -  Straw  -  Waste incineration
  Uncontrolled terms:Actual operation  -  Broken down  -  Emission values  -  Mixed fuel  -  Mixed wastes  -  Multi-objective optimization function  -  National standard  -  Operating condition  -  Optimization of Boiler  -  Pareto optimal solutions   -  Pollutant emission  -  Pollutants emissions
  Classification code:921.5 Optimization Techniques  -  821.5 Agricultural Wastes  -  802.3 Chemical Operations  -  672 Naval Vessels  -  643 Space Heating, Ventilation and Air Conditioning  -  614 Steam Power Plants  -  524 Solid Fuels  -  452.4 Industrial Wastes Treatment and Disposal  -  451.1 Air Pollution Sources
  DOI:10.6041/j.issn.1000-1298.2012.07.022
  Database:Compendex

10.  Accession number:20123515381376
  Title:3D DEM simulations of the cone penetration tests in sandy soil
  Authors:Li, Yanjie1 ; Liu, Yichen1 ; Lin, Jianhui1 ; Xu, Yong2 
  Author affiliation:1  School of Technology, Beijing Forestry University, Beijing 100083, China
                 2  College of Science, China Agricultural University, Beijing 100083, China
  Corresponding author:Li, Y. (liyanjie.bjfu@gmail.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:63-68
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Based on the experiments of the sandy soil penetration, a semi-cylindrical sandy soil bed in 3D was established, and the simulation with discrete element method for the penetration was investigated. According to the studies on the experiments and simulations, the analysis of influencing factors to the cone index of soil was discussed. And the result showed that the vertical resistance of the penetrometer, cone index and the normal force on the semi-cylindrical wall all increased as the increasing of the penetration depth. And the cone indexes of the narrow and big particle soil bed are much larger than the wide and small particle beds. Besides, the normal force on the semi-cylindrical wall of the big particle bed after penetration is larger than the small particle one. Only after the penetration velocity exceeded 0.2 m/s would cone index increase obviously because of impact force from the penetrometer on the particle bed. Finally, according to the displacement of particles, the particle bed after penetration was divided into four zones, and the influencing area could be defined easily, which provided theoretical foundation for determination of distance between measurement points in situ test of soil compaction.
  Number of references:16
  Main heading:Three dimensional computer graphics
  Controlled terms:Experiments  -  Factor analysis  -  Finite difference method  -  Sand  -  Soil mechanics  -  Soils  -  Three dimensional
  Uncontrolled terms:3D simulations  -  Big particles  -  Cone index  -  Cone penetration tests  -  Cone penetrometers  -  DEM Simulation  -  Impact force  -  In-situ test  -  Influencing factor  -  Measurement points   -  Normal forces  -  Penetration velocity  -  Sand soils  -  Sandy soils  -  Small particles  -  Soil compaction  -  Theoretical foundations  -  Vertical resistance
  Classification code:483.1 Soils and Soil Mechanics  -  723.5 Computer Applications  -  901.3 Engineering Research  -  902.1 Engineering Graphics  -  921.6 Numerical Methods  -  922.2 Mathematical Statistics
  DOI:10.6041/j.issn.1000-1298.2012.07.011
  Database:Compendex

11.  Accession number:20123515381377
  Title:Rapid prediction of soil organic matter by using visible infrared spectral technology
  Authors:Song, Haiyan1 ; Qin, Gang2 ; Han, Xiaoping1 ; Liu, Haiqin1 
  Author affiliation:1  College of Engineering, Shanxi Agricultural University, Taigu 030801, China
                 2  College of Forestry, Shanxi Agricultural University, Taigu 030801, China
  Corresponding author:Song, H. (yybbao@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:69-72
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:A total of 156 soil samples with different textures (sand soil (51), clay soil (54) and land soil (51)) were collected, and the spectra of all soil samples were scanned with spectrophotometer (ASD FieldSpec3) from 325 to 2 500 nm. Orthogonal signal correction (OSC) was applied to eliminate the influence of the textures. Soil organic matter (SOM) prediction models of different textural soil samples were then obtained by using partial least square analysis (PLS) and OSC-PLS. The result showed that when the calibration sample was clay and land soil, the correlation coefficients of PLS and OSC-PLS model were 0.809 and 0.823; when the calibration sample was sand and land soil, the correlation coefficients were 0.837 and 0.734; and when the calibration sample was clay and sand soil, the correlation coefficients were 0.887 and 0.823, respectively. SOM content of another textural soil samples were predicted by using above models, the result showed that the predictive correlation coefficients of PLS and OSC-PLS to sand soil were 0.572 and 0.864; to clay soil were 0.555 and 0.540; and to land soil were 0.643 and 0.721, respectively. The results indicate that OSC can eliminate the influence of texture and improve the prediction precision and solidity of the model.
  Number of references:15
  Main heading:Geologic models
  Controlled terms:Biogeochemistry  -  Biological materials  -  Calibration  -  Clay  -  Forecasting  -  Organic compounds  -  Sand  -  Soil surveys  -  Textures
  Uncontrolled terms:Calibration samples  -  Clay soil  -  Correlation coefficient  -  Infrared spectral  -  Orthogonal signal correction  -  Partial least square (PLS)  -  Partial least square analysis  -  Prediction model  -  Prediction precision  -  Predictive correlation   -  Sand soils  -  Soil organic matters  -  Soil sample  -  Visible spectra
  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  -  933 Solid State Physics  -  921 Mathematics  -  812.1 Ceramics  -  804.1 Organic Compounds  -  505 Mines and Mining, Nonmetallic  -  481.2 Geochemistry  -  481.1 Geology  -  461.2 Biological Materials and Tissue Engineering  -  406.2 Roads and Streets
  DOI:10.6041/j.issn.1000-1298.2012.07.012
  Database:Compendex

12.  Accession number:20123515381383
  Title:Numerical prediction and experiment of axial force on deep-well centrifugal pump
  Authors:Zhou, Ling1 ; Shi, Weidong1 ; Lu, Weigang1 ; Li, Zhentong2 ; Li, Wei1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
                  2  Taizhou Jiadi Pump Industry Co., Ltd, Taizhou 317500, China
  Corresponding author:Shi, W. (wdshi@ujs.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:100-103 140
  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 forecast and balance of axial force is the key and difficult aspect in the design of multistage pump. 150QJ20 type deep-well centrifugal pump was chosen as an example; the whole flow field of two-stage deep-well centrifugal pump was simulated in Fluent by the standard k-Ε turbulence model, SIMPLEC algorithm and second-order upwind scheme. The pump efficiency, single-stage head and single-stage axial force at different operating points were obtained by numerical simulations. The external performance and axial force of the prototype pump were tested by the experiments. The difference between numerical results and the experimental result were compared and analyzed. The results indicated that the numerical methods could accurately forecast the pump performance and axial force.
  Number of references:15
  Main heading:Axial flow
  Controlled terms:Centrifugal pumps  -  Computer simulation  -  Experiments  -  Pumps  -  Turbulence models
  Uncontrolled terms:Axial forces  -  External performance  -  Multistage pumps  -  Numerical predictions  -  Numerical results  -  Operating points  -  Pump efficiency  -  Pump performance  -  Second orders  -  SIMPLEC algorithm   -  Single stage  -  Up-wind scheme
  Classification code:618.2 Pumps  -  631.1 Fluid Flow, General  -  723.5 Computer Applications  -  901.3 Engineering Research
  DOI:10.6041/j.issn.1000-1298.2012.07.018
  Database:Compendex

13. Accession number:20123515381400
  Title:Dynamics analysis and simulation of 6-PSS flexible parallel robot
  Authors:Sun, Xiaoyong1 ; Xie, Zhijiang1 ; Jian, Kailin1 ; Zhang, Jun1, 2 
  Author affiliation:1  State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
                 2  China Aerodynamics Research and Development Center, Mianyang 621000, China
  Corresponding author:Xie, Z. (xzj99@vip.sina.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:194-199 205
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:In order to improve the safety of the wind tunnel test, the flexible dynamics of a 6-PSS parallel mechanism for the wind tunnel was analyzed. At first, inverse kinematics of the parallel mechanism was received based on the analysis of its kinematics, and Jacobian matrix was calculated by using the first-order influence coefficient method. Then, the dynamics equation was solved by using the Lagrange equations and a simplified rational dynamics method. A simple and practical method of flexible dynamic simulation was put forward. The flexible dynamic simulation of the parallel was obtained with ADAMS software. The correctness of flexible dynamics simulation was verified by comparing the kinetics and dynamics date form rigid and flexible analysis. At last, the character of flexible kinetics was summed up by analyzing the driven force and flexible deformation data.
  Number of references:15
  Main heading:Dynamics
  Controlled terms:Computer simulation  -  Equations of motion  -  Inverse kinematics  -  Jacobian matrices  -  Kinematics  -  Mechanisms  -  Robots
  Uncontrolled terms:ADAMS software  -  Driven force  -  Dynamics analysis  -  Dynamics equation  -  First-order  -  Flexible deformation  -  Flexible dynamics  -  Influence-coefficient method  -  Lagrange equation  -  Parallel mechanisms   -  Parallel robots  -  Practical method  -  Wind tunnel tests
  Classification code:601.3 Mechanisms  -  723.5 Computer Applications  -  731.5 Robotics  -  921.1 Algebra  -  931.1 Mechanics
  DOI:10.6041/j.issn.1000-1298.2012.07.036
  Database:Compendex

14.  Accession number:20123515381384
  Title:Effect of splitter blade on the performance of pump as turbine
  Authors:Yang, Sunsheng1 ; Kong, Fanyu1 ; Xue, Ling1 ; Hu, Li1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Kong, F. (kongm@ujs.edu.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:104-107
  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:In order to find out the effects of splitter blades on the performance of pump as turbine, a pump as turbine and an open pump as turbine test rig were built. Research results showed that the addition of splitter blades could improve its efficiency, increase its flow rate at the best efficiency point and decrease its required pressure head. Internal flow field analysis showed that the flow field was improved and the area and intensity of vortex region was decreased with the increase of splitter blades. Power loss distribution analysis within pump as turbine showed that power loss within impeller took up the majority of the total power loss. The power loss within impeller was decreased when splitter blades were added to the impeller. With the increase of blade number, the interaction of impeller and volute was enhanced, so the power loss within volute was increased.
  Number of references:13
  Main heading:Turbine components
  Controlled terms:Flow fields  -  Impellers  -  Pumps  -  Well pumps
  Uncontrolled terms:Best efficiency point  -  Blade numbers  -  Field analysis  -  Internal flow field  -  Its efficiencies  -  Power loss distributions  -  Power-losses  -  Pressure heads  -  Pump as turbine  -  Research results   -  Splitter blade  -  Test rigs  -  Total power  -  Vortex regions
  Classification code:601.2 Machine Components  -  617 Turbines and Steam Turbines  -  618.2 Pumps  -  631.1 Fluid Flow, General
  DOI:10.6041/j.issn.1000-1298.2012.07.019
  Database:Compendex

15.  Accession number:20123515381386
  Title:Flow characterization of biomass particle straw
  Authors:Yao, Zonglu1 ; Ouyang, Shuangping2 ; Meng, Haibo1 ; Zhao, Lixin1 ; Tian, Yishui1  
  Author affiliation:1  Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, Beijing 100125, China
                 2  Beijing SANY Heavy Machinery Co., Ltd, Beijing 102206, China
  Corresponding author:Tian, Y. (yishuit@yahoo.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:112-116
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Carr-evaluation method for evaluating flow characterization of biomass particle straw has been studied to resolve the problem of testing flow characterization of crop straw. And the flow characterization of 8 types of crop straw came from North China was measured by the two methods of Carr-evaluation method and inner-friction angle method. The results showed that Carr-evaluation method can reflect the variation of particle straw flow characterization, the more score it had, the better flow characterization it was, and the 8 types of crop straws were divided into three categories, easy flow (such as the score of corn cob was 81), the general flow (such as corn stalks) and difficult flow (such as soybean), the results of Carr-evaluation method is similar to the results of inner-friction angle method.
  Number of references:15
  Main heading:Characterization
  Controlled terms:Crops  -  Friction  -  Particles (particulate matter)  -  Tribology
  Uncontrolled terms:Angle method  -  Biomass Particle  -  Corn cob  -  Corn stalk  -  Evaluation Method  -  Flow characterization  -  Inner-friction angle  -  North China
  Classification code:821.4 Agricultural Products  -  931 Classical Physics; Quantum Theory; Relativity  -  931.1 Mechanics  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2012.07.021
  Database:Compendex

16.  Accession number:20123515381402
  Title:Compound fertilizer particle inspection system based on binocular vision
  Authors:Tang, Qijing1 ; Zhao, Tieshi1 ; Bian, Hui1 ; Tian, Xingbin1 ; Geng, Mingchao1 ; Zhou, You1 
  Author affiliation:1  College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
  Corresponding author:Zhao, T. (tszhao@ysu.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:206-211
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Aiming at the compound fertilizer particle inspection for strong corrosive and high dust environment, a kind of inspection system based on binocular vision was proposed. Firstly, using demand of the inspection system was analyzed, and the design requirements which can realize the continuous large sample testing, and result online showing and granulator closed-loop controlling were put forward. Then three binocular visual inspection plans were proposed and compared. Binocular linear CCD inspection was sure for the feasible plan. Hardware configuration, anti-corrosion and dust removal were designed. In order to improve the precision, electromagnetic vibration feeder was servo controlled, which was feedback by robot vision. Also, double cameras parallel image processing program was used. Finally, particle size distribution experiment was executed. The results show that the system error is within ± 3%, facilitative for practical application.
  Number of references:14
  Main heading:Computer vision
  Controlled terms:Binocular vision  -  Binoculars  -  Fertilizers  -  Inspection equipment  -  Particle size analysis
  Uncontrolled terms:Anti-corrosion  -  Closed-loop  -  Compound fertilizer  -  Design requirements  -  Dust environment  -  Dust removal  -  Electromagnetic vibrations  -  Hardware configurations  -  Inspection system  -  Linear CCD   -  Parallel image processing  -  Sample testing  -  System errors  -  Visual inspection
  Classification code:741.2 Vision  -  741.3 Optical Devices and Systems  -  804 Chemical Products Generally  -  913.3.1 Inspection  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2012.07.038
  Database:Compendex

17.  Accession number:20123515381393
  Title:Extraction of antioxidants from clove and effect of artificial gastrointestinal juice immersion on its antioxidant properties
  Authors:Jiang, Shenhua1 ; Cai, Zhipeng2 ; Liao, Liang1 ; Shangguan, Xinchen2 ; Xu, Mingsheng2 ; Shen, Yonggen2  
  Author affiliation:1   College of Life Science, Jiujiang University, Jiujiang 332000, China
                 2  College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
  Corresponding author:Shen, Y. (foodsp@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:149-155
  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 antioxidants of clove were extracted by water bath shaking, ultrasonic-assisted extraction (UAE), microwave-assisted extraction (MAE) and ultrasonic and microwave-assisted extraction (UMAE), the effective fraction of clove were immersed in the artificial gastrointestinal juice. The results showed that the total polyphenols and flavonoids recoveries were highest, and the antioxidant capacities were strongest for the extracted liquids by MAE and UMAE. However, the extraction time of UMAE was only half of that of MAE. The extraction efficiency of UMAE was the highest. The antioxidant capacities of the effective fraction of clove were significantly improved after immersed by the artificial gastric juice (P < 0.001), while its antioxidant capacities were significantly reduced after immersed by the artificial intestinal juice (P < 0.001).
  Number of references:36
  Main heading:Extraction
  Controlled terms:Agents  -  Body fluids  -  Phenols
  Uncontrolled terms:Antioxidant activities  -  Antioxidant capacity  -  Antioxidant properties  -  Artificial intestinal juice  -  Clove  -  Effective fractions  -  Extraction efficiencies  -  Extraction time  -  Gastric juice  -  Microwave-assisted extraction   -  Polyphenols  -  Water baths
  Classification code:461.2 Biological Materials and Tissue Engineering  -  802.3 Chemical Operations  -  804.1 Organic Compounds
  DOI:10.6041/j.issn.1000-1298.2012.07.028
  Database:Compendex

18.  Accession number:20123515381369
  Title:Simulation and Test of Four-stroke Free-piston Engine
  Authors:Xu, Zhaoping1 ; Chang, Siqin1 ; Huang, Ling1 
  Author affiliation:1  School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  Corresponding author:Xu, Z. (xuzp@njust.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:1-6
  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 four-stroke free-piston engine was simulated and tested to achieve energy conversion from fuel to electricity. Simulation models were created based on the kinetic equation of free-piston, the equation of gas state, and an equivalent heat release rate of combustion process. Dynamic properties of the system were analyzed by using the model. Effects of the compression ratio and the expansion ratio were discussed. Based on the results of the simulation, an experimental prototype was fabricated. Testing results of the prototype were analyzed, and performance parameters were given out in detail. The generating efficiency 34% was obtained up to now, and the efficiency 45% was available after optimization. According to the simulated and tested results, the new generating system has distinct advantages to conventional gasoline generators.
  Number of references:13
  Main heading:Engine pistons
  Controlled terms:Compression ratio (machinery)  -  Computer simulation  -  Energy conversion  -  Integral equations
  Uncontrolled terms:Combustion pro-cess  -  Conventional gasoline  -  Dynamic property  -  Expansion ratio  -  Experimental prototype  -  Four-stroke  -  Free piston  -  Gas state  -  Generating system  -  Heat Release Rate (HRR)   -  Kinetic equations  -  Linear generators  -  Performance parameters  -  Simulation  -  Test  -  Testing results
  Classification code:525.5 Energy Conversion Issues  -  612.1 Internal Combustion Engines, General  -  612.1.1 Internal Combustion Engine Components  -  723.5 Computer Applications  -  921.2 Calculus
  DOI:10.6041/j.issn.1000-1298.2012.07.001
  Database:Compendex

19.  Accession number:20123515381403
  Title:3D part contour curves matching algorithm in panel die-face design
  Authors:Liu, Yulin1, 2 ; Chen, Wenliang1 ; Bao, Yidong1 ; Wang, Xiaoping1 
  Author affiliation:1  College of Mechanical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
                 2  School of Mathematics and Physics, Anhui University of Technology, Maanshan 243032, China
 
  Corresponding author:Chen, W. (cwlme@nuaa.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:212-216
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:3D part contour curves matching algorithm is an important content in panel die-face design based on template. By researching on the existed 3D curves matching algorithm, according to the feature of complex part contour curve, 3D part contour curves matching algorithm was advanced. This algorithm was based on the skills of multiscale filter, feature calculation, partition equivalent class by Hausdorff distance, and the ISODATA cluster analysis method of calculating the best matching switch matrix was put forward. The corresponding programs were developed. The algorithm was demonstrated to be efficient, robust and fault tolerant by three typical examples of actual parts which are the selfsame, different in size and little change in shape.
  Number of references:12
  Main heading:Algorithms
  Controlled terms:Cluster analysis  -  Design  -  Three dimensional
  Uncontrolled terms:Complex parts  -  Curve matching  -  Equivalent class  -  Fault-tolerant  -  Hausdorff distance  -  ISODATA  -  Matching algorithm  -  Multiscale filter  -  Panel  -  Switch matrix   -  Template
  Classification code:408 Structural Design  -  723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications  -  921 Mathematics  -  922 Statistical Methods
  DOI:10.6041/j.issn.1000-1298.2012.07.039
  Database:Compendex

20.  Accession number:20123515381396
  Title:Information acquisition technique of mini-watermelon for harvesting based on near-infrared image in greenhouse
  Authors:Yuan, Ting1 ; Ji, Chao1 ; Zhang, Zhenhua1 ; Zhang, Junxiong1 ; Tan, Yuzhi1 ; Li, Wei1  
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
 
  Corresponding author:Li, W. (liww@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:174-178 155
  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 recognition and localization of the mini-watermelon with stereoscopic cultivation in greenhouse, a machine vision method for acquiring harvesting information of watermelon based on the near-infrared spectral image was presented. By comparing the spectral reflectance of fruit, leaf and stem, a wavelength of about 850 nm was chosen as the best wavelength, of which the images taken at different illumination conditions were tested for fruit recognition. At first, the Otsu threshold algorithm was adopted to eliminate most background information. Then, a template liked circle was used to detect fruit region and reduce the noises. Thirdly, according to the morphological feature, the centroid of fruit was considered as the optimum point for picking and the cutting point was judged by "block-location method". 50 images including fruits and 20 images without fruits were tested by the recognition algorithm, which can satisfactorily detect fruit with a recognition rate of 86% and 95%, respectively, and the accuracy rate of locating algorithm for picking point and cutting point detection was 93.0% and 88.4%, respectively, which met the demand of robotic vision system.
  Number of references:19
  Main heading:Fruits
  Controlled terms:Computer vision  -  Greenhouses  -  Harvesting  -  Infrared devices  -  Infrared imaging
  Uncontrolled terms:Accuracy rate  -  Background information  -  Cutting point  -  Fruit recognition  -  Illumination conditions  -  Information acquisitions  -  Locating algorithm  -  Morphological features  -  Near Infrared  -  Recognition algorithm   -  Recognition rates  -  Robotic vision  -  Spectral images  -  Spectral reflectances  -  Threshold algorithms  -  Watermelon
  Classification code:741.2 Vision  -  741.3 Optical Devices and Systems  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control
  DOI:10.6041/j.issn.1000-1298.2012.07.032
  Database:Compendex

21.  Accession number:20123515381394
  Title:Monitoring of planting area and growth condition of winter wheat in China based on MODIS data
  Authors:Huang, Qing1 ; Li, Dandan1 ; Chen, Zhongxin1 ; Liu, Jia1 ; Wang, Limin1 
  Author affiliation:1  Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  Corresponding author:Huang, Q. (hqing@caas.net.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:163-167
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Taking winter wheat in China as an example, large-scale crop planting areas automatic identification methods were researched based on time-series of MODIS-NDVI datasets. The characteristics of NDVI time series of winter wheat in China were firstly analyzed, and then the threshold values of extracting crop planting area were set and the extraction models of winter wheat were established, finally spatial distribution of winter wheat of 2010-2011 was obtained, the results showed that the extraction accuracy of winter wheat planting area was more than 81% compared with the average statistical data obtained in years. MODIS data of China in 2011 were used to monitor the growth condition of winter wheat, and the growth condition was compared with the average crop growth of the last five years. Results show that winter wheat growth condition has different characteristics both in spatial and temporal.
  Number of references:20
  Main heading:Crops
  Controlled terms:Automation  -  Radiometers  -  Remote sensing
  Uncontrolled terms:Automatic identification  -  Crop growth  -  Crop growth condition  -  Data sets  -  Extraction accuracy  -  Extraction model  -  Growth conditions  -  NDVI time series  -  Normalized difference vegetation index  -  Statistical datas   -  Winter wheat
  Classification code:731 Automatic Control Principles and Applications  -  731.1 Control Systems  -  732 Control Devices  -  821.4 Agricultural Products  -  944.7 Radiation Measuring Instruments
  DOI:10.6041/j.issn.1000-1298.2012.07.030
  Database:Compendex

22.  Accession number:20123515381395
  Title:Design method of parametric image processing system in agricultural image cloud
  Authors:Zheng, Bo1 ; Zhao, Buhui1 ; Jing, Liang1 
  Author affiliation:1  School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Zhao, B. (zhaobuhui@ujs.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:168-173
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:The existing image processing systems were always designed for certain items. One system can not deal with different types of items. In order to solve this problem, a designed method of parametric agricultural image processing system was proposed. Different parameters were set according to the different characteristics of items at first, and then different algorithms were chosen. The design and simulation results of the top-level controller of the system were presented. At last, the description of how to set parameters in the system was also provided. The system has strong flexibility and robustness.
  Number of references:23
  Main heading:Image processing
  Controlled terms:Agriculture  -  Petri nets
  Uncontrolled terms:Design and simulation  -  Design method  -  Image processing system  -  Parametric image  -  Parametric systems
  Classification code:741 Light, Optics and Optical Devices  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
  DOI:10.6041/j.issn.1000-1298.2012.07.031
  Database:Compendex

23.  Accession number:20123515381388
  Title:Agricultural products quality and safety traceability system based on two-dimension barcode recognition of mobile phones
  Authors:Zhao, Li1 ; Xing, Bin1 ; Li, Wenyong1 ; Wu, Xiaoming1 ; Yang, Xinting1  
  Author affiliation:1  National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
  Corresponding author:Yang, X. (yangxt@nercita.org.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:124-129
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Aiming at the poor portability of devices, high cost of the existing traceability methods for agricultural products quality and safety, an agricultural products quality and safety traceability system based on two-dimension barcode recognition of mobile phones was developed. The architecture and main function design of the system were illustrated in detail. Through the tests of the best recognition distance, recognition time, recognition rate and accuracy rate on the system using three types of mobile phones from Nokia in the case of the mobile phone cameras various distances away from the barcodes, the average identification time for barcodes of food wrappers and tagboards was 7.3 s and 5.1 s respectively, average recognition rate was 67.8% and 75.6% respectively, and accuracy rate were to 100%. The best recognition distance was about 10 cm, identification time for barcodes of food wrappers and tagboards was only 6.4 s and 3.4 s respectively. The test results show that users can recognize two-dimension barcode labels attached on products quickly and conveniently through the system, and it will provide a new traceability means.
  Number of references:20
  Main heading:Bar codes
  Controlled terms:Agricultural products  -  Cellular telephones  -  Mobile devices  -  Mobile phones
  Uncontrolled terms:Accuracy rate  -  Function designs  -  High costs  -  Mobile phone cameras  -  QR co des  -  Recognition rates  -  Recognition time  -  Traceability methods  -  Traceability systems  -  Two-dimension barcode
  Classification code:716 Telecommunication; Radar, Radio and Television  -  718.1 Telephone Systems and Equipment  -  723.2 Data Processing and Image Processing  -  821.4 Agricultural Products
  DOI:10.6041/j.issn.1000-1298.2012.07.023
  Database:Compendex

24.  Accession number:20123515381375
  Title:Effect of agricultural water-saving measures on the quantity of groundwater extraction and recharge and its sensitivity
  Authors:Peng, Zhigong1 ; Liu, Yu1 ; Xu, Di1 ; Wang, Lei1 
  Author affiliation:1  State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
  Corresponding author:Liu, Y. (liuyu@iwhr.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:36-41
  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:Daxing distict of Beijing was selected as the study area, the effect of agricultural water-saving measures on the quantity of groundwater extraction and recharge was studied by rejusting irrigation water supply rates and irrigation water supply rates based on the calibrated water balance model. The main results were as follows: when irrigation water supply rates decreased and water use efficiency increased, groundwater extraction was decreased significantly in different hydrological years. When irrigation water supply rates decreased, the net groundwater extraction was decreased much more than when irrigation water use efficiency increased. The sensitivity analysis showed that irrigation water supply rate is much more sensitive variable to the groundwater extraction. On the other hand, irrigation water use efficiency is much more sensitive to groundwater recharge. Within the value of index level selection, the variation of irrigation water supply rate is much more sensitive to groundwater extraction and exchange. With the increace of irrigation water use efficiency, the sensitivity to groundwater extraction and exchange is decreased. Therefore, compared with the increase of irrigation water use efficiency, the decrease of regional irrigation water supply rates is much better to promote regional water resource continuously and effectively as well as to reduce groundwater extraction for water shortage region under any water-saving condition.
  Number of references:11
  Main heading:Recharging (underground waters)
  Controlled terms:Irrigation  -  Water conservation  -  Water resources  -  Water supply
  Uncontrolled terms:Groundwater exchanges  -  Groundwater extraction  -  Irrigation water supply  -  Irrigation water use efficiency  -  Sensitivity  -  Water-saving
  Classification code:444 Water Resources  -  444.2 Groundwater  -  446.1 Water Supply Systems  -  821.3 Agricultural Methods
  DOI:10.6041/j.issn.1000-1298.2012.07.007
  Database:Compendex

25.  Accession number:20123515381401
  Title:Kinematic analysis and simulation of 3-CRPa translational parallel mechanism
  Authors:Zhang, Yanbin1 ; Zhang, Shuqian2 ; Wu, Xin2 
  Author affiliation:1  School of Planning and Architectural Engineering, Henan University of Science and Technology, Luoyang 471003, China
                 2  School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China
  Corresponding author:Zhang, Y. (yanbin_zh@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:200-205
  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 novel translational parallel mechanism with three degrees of freedom was presented, which consisted of a moving platform connecting with a fixed base by three identical limbs. Mobility of the moving platform was analyzed and calculated according to the units of single-open-chain. Kinematic problems were discussed by means of different actuated joints inputs, i. e., rotational angle displacements and linear displacements, respectively. The analytical solutions of position, velocity and acceleration were derived. The kinematic simulation of this mechanism was carried out by Matlab and Pro/E software. Position, velocity and acceleration curves were described based on the analytical solutions and virtual prototype. Simulation results showed that the theoretic analysis was correct and feasible. When the linear displacements are selected as the actuated inputs, the Jacobian matrix of the mechanism is an identity one and its condition number is always equal to 1. The parallel mechanism, therefore, is full-isotropic throughout the entire workspace in this case.
  Number of references:11
  Main heading:Mechanisms
  Controlled terms:Fixed platforms  -  Jacobian matrices  -  Kinematics  -  MATLAB  -  Number theory
  Uncontrolled terms:Acceleration curve  -  Actuated joint  -  Condition numbers  -  Fixed base  -  Isotropy  -  Kinematic Analysis  -  Kinematic simulations  -  Linear displacements  -  Moving platform  -  Parallel mechanisms   -  Pro/E software  -  Rotational angle  -  Theoretic analysis  -  Three degrees of freedom  -  Translational parallel mechanisms  -  Virtual prototype
  Classification code:511.2 Oil Field Equipment  -  601.3 Mechanisms  -  921 Mathematics  -  921.1 Algebra  -  931.1 Mechanics
  DOI:10.6041/j.issn.1000-1298.2012.07.037
  Database:Compendex

26.  Accession number:20123515381370
  Title:Cold start control strategy of gasoline direct injection engine
  Authors:Qi, Wanqiang1, 2 ; Yu, Xiumin1 ; Zhang, Yun1, 3 ; Ma, Zhongwen2 ; Ji, Bingfei2 ; Zhao, Xuefeng1 
  Author affiliation:1  State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
                 2  Aviation Control Engineering Department, Aviation University of Air Force, Changchun 130022, China
                 3  School of Electrical and Information Engineering, Changchun Institute of Technology, Changchun 130012, China
  Corresponding author:Yu, X. (yuxm@jlu.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:7-12
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:The control strategy, on the basis of features and demands of cold start conditions, was developed and illustrated thoroughly. The experimental platform was built up and the program of the cold start control strategy was written based on the preliminary work of electronic control system and test bench, and the research on cold start was made. The results show that the engine starts by three cycles successfully with the optimal control parameters for each stage to control cold start process. The engine speed fluctuated around 1023 r/min and the speed fluctuation rate was only 6%. The light-off time of the catalyst was 38 s and HC emission was at lower lever. The control strategy can meet the general demands for GDI engine cold start.
  Number of references:11
  Main heading:Software testing
  Controlled terms:Control
  Uncontrolled terms:Cold start  -  Control strategies  -  Electronic control systems  -  Engine speed  -  Engine start  -  Experimental platform  -  Gasoline direct injection engines  -  GDI engine  -  HC emissions  -  Light-off   -  Optimal controls  -  Speed fluctuations  -  Test benches
  Classification code:723.5 Computer Applications  -  731 Automatic Control Principles and Applications  -  732 Control Devices
  DOI:10.6041/j.issn.1000-1298.2012.07.002
  Database:Compendex

27.  Accession number:20123515381390
  Title:Analysis of sesame oil adulteration using near infrared transmission spectroscopy
  Authors:Liu, Yande1 ; Wan, Changlan1 
  Author affiliation:1  School of Mechanical Engineering, East China Jiaotong University, Nanchang 330013, China
  Corresponding author:Liu, Y. (jxliuyd@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:136-140
  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:Near-infrared spectroscopy (NIRS) quantitative detection models of sesame oil adulterated respectively with soybean oil, corn oil and peanut oil were established by interval partial least squares (iPLS). Mixed samples of sesame and adulterated oils with different proportions were scanned by using a FT-NIR spectrometer and the near infrared transmission spectra were collected in 4 000-12 000 cm-1 region which divided into calibration and prediction set. The spectra in 4420-12000 cm-1 region was pretreated with different ways and the best was Savitzky-Golay moving. The characteristic wavelength bands were selected by iPLS and the quantitative models were established by PLS finally. The results showed that predicted correlation coefficients of the models built with PLS for three kinds of vegetable oil reached to 0.998, 0.999, 0.999 respectively, while the root mean square error of prediction were 0.24%, 0.24%, 0.19%, which have high accuracy. The experiments proved that NIRS technique used for rapid detection of adulterated oil in sesame oil possesses certain feasibility.
  Number of references:11
  Main heading:Vegetable oils
  Controlled terms:Infrared devices  -  Infrared transmission  -  Mean square error  -  Textiles
  Uncontrolled terms:Adulteration  -  Corn oil  -  Correlation coefficient  -  Interval partial least squares  -  Interval partial least-squares (iPLS)  -  Mixed samples  -  Near Infrared  -  Near-infrared transmission spectroscopy  -  Peanut oil  -  Quantitative detection   -  Quantitative models  -  Rapid detection  -  Root-mean-square error of predictions  -  Savitzky-Golay  -  Sesame oil  -  Soybean oil  -  Wavelength band
  Classification code:731.1 Control Systems  -  741.1 Light/Optics  -  741.3 Optical Devices and Systems  -  804.1 Organic Compounds  -  819 Synthetic and Natural Fibers; Textile Technology
  DOI:10.6041/j.issn.1000-1298.2012.07.025
  Database:Compendex

28.  Accession number:20123515381382
  Title:Effect and experiment of different blade thickness on stainless steel stamping well pump performance
  Authors:Wang, Chuan1 ; Shi, Weidong1 ; Lu, Weigang1 ; Li, Tongtong1 ; Zhang, Qihua1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Wang, C. (wangchuan198710@126.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:94-99
  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:Combined with the technological features of stamping pump, numerical simulation based on Fluent was made for 100XQJ8-43/9 stamping well pump. In order to improve the accuracy of numerical calculation, numerical calculation of stamping well pump model of different blade thicknesses was carried out by using different grid numbers and different stage models. The relationship between the blade thickness and the overall performance of pump was analyzed from the external characteristics and internal flow field. In conclusion, with the increase of blade thickness, the best efficiency point of pump shifts to the small flow direction and the internal turbulence losses of pump were increasing gradually. Through the experiment of the mode pump, the numerical simulation values under the whole flow field are much closed to the experimental values and the error is less than 1%, which verified the feasibility of numerical simulation. The text would be instructive to the optimization of new-type well pump which is designed by the impeller diameter maximum approach.
  Number of references:10
  Main heading:Computer simulation
  Controlled terms:Experiments  -  Flow fields  -  Stamping  -  Well pumps
  Uncontrolled terms:Best efficiency point  -  Blade thickness  -  Experimental values  -  External characteristic  -  Flow direction  -  Internal flow field  -  Numerical calculation  -  Performance analysis  -  Pump models  -  Pump performance   -  Stage models  -  Technological feature
  Classification code:446.1 Water Supply Systems  -  535.2 Metal Forming  -  631.1 Fluid Flow, General  -  723.5 Computer Applications  -  901.3 Engineering Research
  DOI:10.6041/j.issn.1000-1298.2012.07.017
  Database:Compendex

29.  Accession number:20123515381379
  Title:Comparison of interpolation functions in control volume finite element method and numerical analysis
  Authors:Song, Yu1 ; Cao, Shuliang1  
  Author affiliation:1  State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
  Corresponding author:Cao, S. (caoshl@mail.tsinghua.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:79-84
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:Control volume finite element method to solve incompressible flow problems was investigated. The streamline FCBI method was built and compared with the original FCBI and general FCBI method. Lid-driven cavity flow and S-channel flow were chosen as the test cases. The similarities and differences among the three interpolation functions were discussed according to the analysis. The results showed that for convection-dominated flow, especially with complex performances, the Streamline FCBI method could better describe the velocity distributions in the element and achieve more stable converged results. For convection-diffusion problems, the precision of all the methods were low when element Re was high. From the analysis that for convection-diffusion problems, it is concluded that good results can be achieved by using FCBI methods when element Re is less than 5.
  Number of references:11
  Main heading:Interpolation
  Controlled terms:Channel flow  -  Diffusion in liquids  -  Finite element method  -  Heat convection  -  Incompressible flow
  Uncontrolled terms:Control volumes  -  Control-volume finite-element methods  -  Convection diffusion problems  -  Convection-dominated flow  -  Element re  -  In-control  -  Interpolation function  -  Lid driven cavity flow  -  Test case
  Classification code:631 Fluid Flow  -  641.2 Heat Transfer  -  921.6 Numerical Methods  -  931.1 Mechanics  -  931.2 Physical Properties of Gases, Liquids and Solids
  DOI:10.6041/j.issn.1000-1298.2012.07.014
  Database:Compendex

30.  Accession number:20123515381391
  Title:Rapid construction of near-infrared microscopic spectra database for identification of meat and bone meal
  Authors:Jiang, Xunpeng1 ; Yang, Zengling1 ; Liu, Xian1 ; Han, Lujia1, 2  
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
                 2  State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing 100083, China
  Corresponding author:Han, L. (hanlj@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:141-144
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:A new strategy was demonstrated to establish typical spectra database. For the study, bone fragments of three different species MBM were analyzed on near-infrared microscopic imaging system, and both visible and near-infrared images were acquired at the same size. To extract and mark the position of every single bone fragment in visible image, a graphical user-friendly interface, based on marker-controlled watershed segmentation method, written in Matlab for extracting and marking bone fragments has been developed. The recognition ratio was 96.4%. By the position information in visible image, near-infrared microscopic imaging data was decompounded to spectrum of each bone fragment. Next, typical spectra were selected by the multivariate 'distances'-Global Hood (GH) & Neighbor Hood (NH) statistics.
  Number of references:15
  Main heading:Bone
  Controlled terms:Database systems  -  Image segmentation  -  Infrared devices  -  Infrared imaging  -  Microscopic examination
  Uncontrolled terms:Bone fragments  -  Marker-controlled watershed segmentation  -  Meat and bone meal  -  Microscopic imaging  -  Near Infrared  -  Position information  -  Rapid construction  -  Rapid determination  -  Recognition ratio  -  User friendly interface   -  Visible and near infrared  -  Visible image
  Classification code:461.2 Biological Materials and Tissue Engineering  -  723.2 Data Processing and Image Processing  -  723.3 Database Systems  -  741.1 Light/Optics  -  741.3 Optical Devices and Systems
  DOI:10.6041/j.issn.1000-1298.2012.07.026
  Database:Compendex

31.  Accession number:20123515381385
  Title:Ethanol production from detoxified corn stover hydrolysate
  Authors:Zhang, Qiang1 ; Zhuang, Li2 ; Thomsen, A.B.3 
  Author affiliation:1  Life Science College, Changchun Science and Technology University, Changchun 130022, China
                 2  Foreign Language Department, Baicheng Medical College, Baicheng 137000, China
                 3  Biosystems Department, National Lab for Sustainable Energy, Roskilde 450002, Denmark
  Corresponding author:Zhang, Q. (corn11@126.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:108-111
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:After hydrothermal pretreatment of corn stover, solid fraction and hydrolysate were collected separately. To find out the appropriate process for ethanol production from corn stover, ethanol production was evaluated from dried solid fraction and the hydrolysate employed as liquid fraction by baker' yeast. The effects of different pH value and detoxification on ethanol production were investigated. Firstly, prehydrolysis was performed at 50°C for 24 h. When 100% hydrolysate was added, ethanol content of 0.31 g/L (9.48% of theoretical ethanol yield) was obtained based on the cellulose available in the pretreated corn stover due to the existence of acetic acid and furans which are important inhibitors of the fermentation to microorganisms. After prehydrolysis, the initial pH value was adjusted to 5.5, 6.0 and 6.5, respectively. The best value obtained was ethanol content of 10.67 g/L with addition of 100% hydrolysate at pH value of 5.5. The hydrolysate was overlimed, then prehydrolysized for 24 h at 50°C. After prehydrolysis, the initial pH value was adjusted again to 5.5. Ethanol content of 10.96 g/L (57.9% of theoretical ethanol yield) was obtained. Ethanol yield increased almost 6 times compared to that at pH value of 4.8.
  Number of references:12
  Main heading:Ethanol
  Controlled terms:Acetic acid  -  Detoxification  -  Hydrolysis  -  pH effects
  Uncontrolled terms:Best value  -  Corn stover  -  Ethanol production  -  Ethanol yield  -  Hydrolysate  -  Hydrothermal pretreatment  -  Initial pH value  -  Liquid fraction  -  pH value  -  Prehydrolysis   -  Solid fraction
  Classification code:445.1 Water Treatment Techniques  -  801.1 Chemistry, General  -  802.2 Chemical Reactions  -  804.1 Organic Compounds
  DOI:10.6041/j.issn.1000-1298.2012.07.020
  Database:Compendex

32.  Accession number:20123515381399
   Title:Strategy-switching control for hydraulic force bilateral servo system when catching objects
 
   Authors:Hou, Jingwei1 ; Zhao, Dingxuan1 ; Gong, Mingde1 ; Li, Yingjie1 ; Ni, Tao1 
   Author affiliation:1  College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
   Corresponding author:Zhao, D. (zdx@jlu.edu.cn
   Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
   Abbreviated source title:Nongye Jixie Xuebao
   Volume:43
   Issue:7
   Issue date:July 2012
   Publication year:2012
   Pages:190-193 211
   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 research object is a force bilateral servo system in which the master side is a hydraulic manipulator and the slave side is a hydraulic cylinder actuated robot. Facing the concussion problem occurred when the slave hand contact rigidity object, a strategy-switching algorithm was proposed. A four-channel slave driving strategy was used to the flexible load and a three-channel strategy without slave force was used to the rigidity load. The switch was judged by the ratio of slave force and velocity. It is proved by the experiments that the strategy is valid and the concussion problem of the former strategy when catching rigidity object could be avoided.
   Number of references:10
   Main heading:Rigidity
   Controlled terms:Manipulators  -  Servomechanisms
   Uncontrolled terms:Driving strategy  -  Force feedback  -  Four-channel  -  Hydraulic cylinders  -  Hydraulic force  -  Hydraulic manipulator  -  Hydraulic servo control  -  Master slave control  -  Research object
   Classification code:705 Electric Generators and Motors  -  731.5 Robotics  -  951 Materials Science
   DOI:10.6041/j.issn.1000-1298.2012.07.035
   Database:Compendex

33.  Accession number:20123515381374
  Title:Ecological and environmental assessment on the effects of water and soil loss comprehensive harness in meso-scale watershed in loess hilly region
  Authors:Wang, Bing1 ; Liu, Guobin2 ; Zhang, Guanghui1, 2 ; Yang, Qinke2, 3 ; Yang, Yanfen4 
  Author affiliation:1  School of Geography, Beijing Normal University, Beijing 100875, China
                 2  State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
                 3  College of Urban and Environmental Science, Northwest University, Xi'an 710127, China
                 4  Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  Corresponding author:Liu, G. (gbliu@ms.iswc.ac.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:28-35
  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 index system was constructed for accessing eco-environmental effect of water and soil loss comprehensive harness in meso-scale based on the DPSIR model. The eco-environmental effect of grain for green project was accessed. The results showed that comprehensive value of environmental effect of ecological restoration increased by 30% in test stage, 43% in formal implement stage, 56% in restoration stage, respectively compared with those in the initial stage of evaluation; whereas the values of environmental subentry decreased by 6%, 20% and 22%, respectively; values of social subentry increased by 43%, 114% and 143%, respectively; the values of economic subentry increased by 29%, 129% and 129%, respectively. Grain for green, farmland pressure, sediment transport modulus and erosive precipitation were sensitive indices which indicated that there was a hysteretic nature of eco-environmental changes compared with driving and pressure factors. Impacts of the project of grain for green for eco-environment to response usually need a period of time.
  Number of references:22
  Main heading:Geologic models
  Controlled terms:Ecology  -  Restoration  -  Sediment transport  -  Watersheds
  Uncontrolled terms:Eco-environments  -  Ecological restoration  -  Effect of water  -  Environmental assessment  -  Index systems  -  Initial stages  -  Loess hilly region  -  Mesoscale  -  Sensitive index  -  Soil loss
  Classification code:402 Buildings and Towers  -  409 Civil Engineering, General  -  444.1 Surface Water  -  454.3 Ecology and Ecosystems  -  481.1 Geology  -  631.3 Flow of Fluid-Like Materials
 
  DOI:10.6041/j.issn.1000-1298.2012.07.006
  Database:Compendex

34.  Accession number:20123515381381
  Title:Implementation on numerical algorithm for centrifugal pump rotor-stator flow coupling
  Authors:Zhang, Qihua1 ; Xu, Yan1 ; Shi, Weidong1 ; Zhang, Desheng1 
  Author affiliation:1  Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
  Corresponding author:Zhang, Q. (qihua05@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:89-93 99
  Language:Chinese
  ISSN:10001298
  CODEN:NUYCA3
  Document type:Journal article (JA)
  Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
  Abstract:To solve the problem of rotor-stator flow coupling, the FVM was adopted to discretize the incompressible rotating flow equations. The time and spatial discretization schemes of the convective, diffusive, and the source term of the equations were investigated. For the rotor, the non-inertial reference frame was adopted to solve the relative flow equations, and for the stator, the inertial reference frame was adopted to solve the absolute flow equations. To keep flux conservation, the Neuman condition was prescribed on the rotor-stator interface. To realize the rotor-stator flow coupling, the relative velocity at rotor outlet was transformed to the absolute velocity, which used as the stator inlet condition. Then a switch mode was adopted to run the algorithm. To validate this algorithm, the flow coupling between the ERCOFTAC centrifugal impeller and the diffuser was conducted, and the steady and unsteady results were obtained and compared with the literature. And good consistency was observed by comparison. It shows that the algorithm is capable of forcasting the rotor-stator flow coupling. The algorithm can be used to forecast and investigate the centrifugal pump flows.
  Number of references:11
  Main heading:Rotors (windings)
  Controlled terms:Algorithms  -  Centrifugal pumps  -  Centrifugation  -  Flow fields  -  Stators
  Uncontrolled terms:Centrifugal impeller  -  Flow coupling  -  Flow equations  -  Inlet conditions  -  Numerical algorithms  -  Reference frame  -  Relative flow  -  Relative velocity  -  Rotating flow  -  Rotor-stator coupling   -  Rotor-stator interface  -  Source terms  -  Spatial discretization schemes
  Classification code:921 Mathematics  -  802.3 Chemical Operations  -  723 Computer Software, Data Handling and Applications  -  705.1 Electric Machinery, General  -  704.1 Electric Components  -  631.1 Fluid Flow, General  -  618.2 Pumps
  DOI:10.6041/j.issn.1000-1298.2012.07.016
  Database:Compendex
 
35.  Accession number:20123515381372
  Title:HRTEM analysis of particles of diesel engine fuelled with biodiesel
  Authors:Ma, Zhihao1 ; Zhang, Xiaoyu1 ; Ma, Fanhua2 ; Xu, Bin1 ; Wu, Jian1 
  Author affiliation:1  College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China
                 2  State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
  Corresponding author:Ma, Z. (mazhihao@mail.haust.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:19-23
  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:Microstructure and size of particle emitted from the three-cylinder, direct injection diesel engine were investigated by using HRTEM under two fuel supply advance angles, two operating conditions and two kinds of proportions of biodiesel/diesel blends. The results indicated that under the research conditions, spherical primary particles consisted of the particles generated by the combustion of the fuels. The particles exhibited the different shapes and characteristics of fractal structure. The primary particles have multilayer graphite-like microcrystal structure. The diameters of primary particle for B0 and B20 are ranged between 25.6-31.3 nm and 28.7-40.0 nm, respectively. Mean diameter of primary particles of B20 is larger than that of B0.
  Number of references:10
  Main heading:Diesel engines
  Controlled terms:Biodiesel  -  Microstructure
  Uncontrolled terms:Different shapes  -  Direct injection diesel engines  -  Fractal structures  -  Fuel supply advance angle  -  HRTEM analysis  -  Mean diameter  -  Operating condition  -  Particle emissions  -  Primary particles
  Classification code:523 Liquid Fuels  -  612.2 Diesel Engines  -  933 Solid State Physics  -  951 Materials Science
  DOI:10.6041/j.issn.1000-1298.2012.07.004
  Database:Compendex

36.  Accession number:20123515381389
  Title:Growth model of acinetobacter lwoffi based on impedance method
  Authors:Liu, Donghong1 ; Tang, Jiani1 ; Xu, Shuzhen2 ; Zhang, Aiping1 
  Author affiliation:1  School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
                2  College of Life Science, Yantai University, Yantai 264005, China
  Corresponding author:Liu, D. (dhliu@zju.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:130-135 123
  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:Acinetobacter lwoffi was studied by impedance and plate count method throughout rotational combination design to define the effects of temperature and pH value on maximal specific growth rate (μm) of A. lwoffi, conductance and admittance. Polynomial models were established (Pr < 0.05) and validated. The results showed that the established model with viable count method was better than the other two (R2=0.9455), which fit well when μm was less than 0.06. The correlation equation between μm of conductance/admittance and μm of A. lwoffi were established and the R2 were 0.859 and 0.806, respectively.
  Number of references:11
  Main heading:Mechanical engineering
  Controlled terms:Agricultural engineering
  Uncontrolled terms:Acinetobacters  -  Combination design  -  Correlation equation  -  Effects of temperature  -  Growth models  -  Impedance method  -  pH value  -  Polynomial models  -  Specific growth rate  -  Viable count
  Classification code:608 Mechanical Engineering, General  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control
  DOI:10.6041/j.issn.1000-1298.2012.07.024
  Database:Compendex

37.  Accession number:20123515381380
  Title:Fluid leakage characteristic test on balance aperture of centrifugal pump impeller
  Authors:Liu, Zailun1 ; Wang, Dongwei1 ; Liang, Sen2 
  Author affiliation:1  College of Energe and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
                  2  Honeywell Environmental and Combustion Controls (Tianjin) Co., Ltd, Tianjin 300457, China
  Corresponding author:Liu, Z. (liuzl88@sina.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  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:The test by changing different diameters of balanced hole in the 3BA-6 single grade single suction pump was made. The pressure of outlet of impeller rear sealing and the pressure of inlet in pump were measured. The test curves of the liquid pressure in balance cavum and the pump head, and the pressure of import of the pump and the pump head were both obtained. Thus the fluid leakage characteristic curves of balance cavum were obtained. The theoretical curves and the test curves of fluid leakage in balance cavum at the different diameters were compared and analyzed in design condition. After measured the axial force curves of pump, the result showed that axial force curves which obtained by calculating based on the fluid leakage characteristic curves of balance cavum could meet the engineering calculation need.
  Number of references:10
  Main heading:Pumps
  Controlled terms:Axial flow  -  Centrifugal pumps  -  Impellers  -  Leakage (fluid)
  Uncontrolled terms:Axial forces  -  Balanced hole  -  Centrifugal pump impellers  -  Characteristic curve  -  Characteristic test  -  Design condition  -  Engineering calculation  -  Fluid leakage  -  Liquid pressure  -  Pump head
  Classification code:452.3 Industrial Wastes  -  601.2 Machine Components  -  618.2 Pumps  -  631.1 Fluid Flow, General
  DOI:10.6041/j.issn.1000-1298.2012.07.015
  Database:Compendex

38.  Accession number:20123515381406
  Title:Cutting performance of self-lubricating turning tools with elliptical micro-textures
  Authors:Wu, Ze1 ; Deng, Jianxin1 ; Xing, Youqiang1 ; Cheng, Jie1 ; Zhao, Jun1 
  Author affiliation:1  Department of Mechanical Engineering, Shandong University, Ji'nan 250061, China
  Corresponding author:Deng, J. (jxdeng@sdu.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:228-234
  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:Elliptical micro-textures were made by using laser on the rake face of the tungsten carbide cutting inserts. Molybdenum disulfide (MoS2) solid lubricants were embedded into the micro-textures to form self-lubricating textured tools. Finite element analysis was conducted to assess the effect of micro-texture on the stress distribution of the cutting inserts. Dry cutting tests were carried out with these self-lubricated cutting tools and conventional cemented carbide tools. As the results, there is no conspicuous adverse effect on the stress distribution of the tool nose with micro-textures on the rake face. The cutting forces and the cutting temperatures with the self-lubricating textured tools were greatly reduced compared with that of conventional cemented carbide tools. Meanwhile, the rake wear and the chip deformation were reduced, and the chip coiling was improved with micro-texturing lubrication.
  Number of references:16
  Main heading:Lubrication
  Controlled terms:Carbide tools  -  Cutting  -  Cutting tools  -  Finite element method  -  Molybdenum  -  Molybdenum compounds  -  Solid lubricants  -  Stress concentration  -  Textures  -  Tungsten   -  Tungsten carbide  -  Turning
  Uncontrolled terms:Adverse effect  -  Cemented carbide tools  -  Cutting forces  -  Cutting performance  -  Cutting temperature  -  Dry cutting  -  Micro-texture  -  Molybdenum disulfide  -  Rake face  -  Self-lubricating   -  Turning tools
  Classification code:933 Solid State Physics  -  921.6 Numerical Methods  -  812.1 Ceramics  -  804.1 Organic Compounds  -  607.2 Lubrication  -  607.1 Lubricants  -  604.2 Machining Operations  -  604.1 Metal Cutting  -  603.2 Machine Tool Accessories  -  543.5 Tungsten and Alloys  -  543.3 Molybdenum and Alloys  -  422 Strength of Building Materials; Test Equipment and Methods  -  421 Strength of Building Materials; Mechanical Properties
  DOI:10.6041/j.issn.1000-1298.2012.07.042
  Database:Compendex

39.  Accession number:20123515381378
  Title:Effects of fertilization patterns on NH4 -N and NO3--N in solar greenhouse soils
  Authors:Shang, Fangze1 ; Yang, Peiling1 ; Ren, Shumei1 ; Wang, Qing2 ; Li, Yunkai1 ; Liu, Peibin3 
  Author affiliation:1  College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
                 2  Hydrochina Huadong Engineering Corporation, Hydrochina Corporation, Hangzhou 310014, China
                 3  Beijing Institute of Water, Beijing 100048, China
  Corresponding author:Yang, P. (yang-pl@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:73-78 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:Over the course of two rape growing cycles, fertilization types and application rates affected plant growth and groundwater pollution from solar vegetable greenhouses in Beijing agricultural region were studied. Seven fertilization patterns were selected, and in each treatment, the NH4 -N and NO3--N migration and accumulation in 0-200 cm solar greenhouse soil and the affect on rape yield were studied. The results showed that the different fertilization patterns mainly affected the average NH4 -N accumulation and content in the 0-40 cm soil layer. Average soil NH4 -N accumulation and content was larger in the treatment of only chemical fertilizer than that of only organic manure. When N application rate was less than 383 kg/hm2, the average soil NO3--N accumulation and content in the 0-40 cm soil layer were found to be in the following descending order: use of only chemical fertilizer, use of only organic manure, use of both organic manure and chemical fertilizer. The different fertilization patterns also affected the migration and accumulation of NO3--N in 40-160 cm soil. It is concluded that organic manure (N application 150 kg/hm2) mixed with chemical fertilizer (191 kg/hm2) is the best fertilization pattern for planting rape in solar greenhouses in Beijing agricultural region.
  Number of references:21
  Main heading:Soils
  Controlled terms:Agriculture  -  Fertilizers  -  Greenhouses  -  Manures  -  Solar heating
  Uncontrolled terms:Accumulation  -  Application rates  -  Chemical fertilizers  -  Fertilization patterns  -  Growing cycle  -  Migration  -  Migration and accumulation  -  Organic manure  -  Plant growth  -  Soil layer   -  Solar greenhouse
  Classification code:483.1 Soils and Soil Mechanics  -  643.1 Space Heating  -  804 Chemical Products Generally  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control
  DOI:10.6041/j.issn.1000-1298.2012.07.013
  Database:Compendex

40.  Accession number:20123515381371
  Title:Carbonyl compounds emission from engine fueled with ethanol-biodiesel-diesel
  Authors:Zhang, Xuemin1 ; Qiu, Bo1 ; Tan, Jianwei2 ; Wang, Xiaoyan1 ; Li, Hongwen1  
  Author affiliation:1  College of Engineering, China Agricultural University, Beijing 100083, China
                 2  National Laboratory of Auto Performance and Emission Test, Beijing Institute of Technology, Beijing 100081, China
  Corresponding author:Li, H. (lhw@cau.edu.cn
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:13-18
  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 different carbonyl compounds emission from ethanol-biodiesel-diesel and diesel were investigated using high-performance liquid chromatography. The result showed that at rated speed, the overall specific emission of carbonyl compounds decreased by 2.98% at 10% load and 16.42% at 50% load, meanwhile, increased by 11.79% at full load. The C1-C3 pollutants of formaldehyde, acetaldehyde, acrolein-acetone are the main carbonyl compounds, and up to 91.9% among carbonyl compounds emission. In general, the emission of carbonay compounds decreased as load increasing or speed decreasing.
  Number of references:11
  Main heading:Ethanol
  Controlled terms:Acetone  -  Aldehydes  -  Biodiesel  -  Carbonyl compounds  -  Diesel fuels  -  High performance liquid chromatography
  Uncontrolled terms:Bio-diesel fuel  -  Diesel  -  Full-load  -  Unregulated emissions
  Classification code:523 Liquid Fuels  -  801 Chemistry  -  804.1 Organic Compounds
  DOI:10.6041/j.issn.1000-1298.2012.07.003
  Database:Compendex
 
41.  Accession number:20123515381373
  Title:Numerical simulation on the fluid-solid coupled heat transfer of the CNG engine cylinder head
  Authors:Li, Su1 ; Zheng, Qingping1 ; Zhang, Kunpeng2 ; Liu, Guopeng1 ; Zhang, Shaojie1 
  Author affiliation:1  School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300400, China
                 2  Tianjin LOVOL Engines Co., Ltd, Tianjin 300402, China
  Corresponding author:Li, S. (lewis_1001@163.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:24-27 18
  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:Fluid-solid coupled heat transfer simulation of cylinder head in CNG engine were carried out by using CFD software, the temperature field and the flow field of cylinder head were achieved and investigated. Calculating results were compared with the experimental results in order to validate the veracity of model. Improvements refer to gasket hole area have been presented according to the problems in calculation results. The cooling effect was improved by increasing water flow quantity in the vicinity of fifth cylinder and decreasing the water flow quantity near the first and second cylinders.
  Number of references:10
  Main heading:Heat transfer
  Controlled terms:Computer simulation  -  Computer software  -  Cylinder heads  -  Flow of water  -  Hydraulics
  Uncontrolled terms:CFD softwares  -  CNG engine  -  Cooling effects  -  Fluid-solid coupled  -  Water flows
  Classification code:612.1.1 Internal Combustion Engine Components  -  631.1.1 Liquid Dynamics  -  632.1 Hydraulics  -  641.2 Heat Transfer  -  723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications
  DOI:10.6041/j.issn.1000-1298.2012.07.005
  Database:Compendex

42.  Accession number:20123515381392
  Title:Manufacture method of fortified vitamin B1 and vitamin B2 rice using extrusion technology and edible qualities analysis
  Authors:An, Hongzhou1 ; Liu, Jufen1 ; Zhang, Haihui2 ; Yang, Botao1 ; Xue, Wentong3  
  Author affiliation:1  Food Engineering and Research Center of State Administration of Grain, Henan University of Technology, Zhengzhou 450001, China
                 2  School of Food and Biological Engineering, Jiangsu University, Zhenjiang 21201 3, China
                  3  College of Food Science and Nutrition Engineering, China Agricultural University, Beijing 100083, China
  Corresponding author:Xue, W. (xwt315@hotmail.com
  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
  Abbreviated source title:Nongye Jixie Xuebao
  Volume:43
  Issue:7
  Issue date:July 2012
  Publication year:2012
  Pages:145-148
  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 manufactured method of fortified vitamin B1 and vitamin B2 rice by using extrusion technology was introduced, and the HPLC (high performance liquid chromatography) result showed that retention ratios of vitamin B1 and vitamin B2 in the fortified rice were 62.8% and 81.0%, respectively. The physicochemical properties of fortified rice had great changes compared to the raw rice, the degree of starch gelatinization and water soluble carbohydrates obviously increased from 8.86%, 0.58% to 86.21% and 2.98% respectively, and the apparent density decreased from 0.91 g/cm3 to 0.80 g/cm3. The SEM (scanning electron microscope) result indicated that the surface of fortified rice presented in smooth and even micro-porous structure. The edible qualities of fortified rice accessed high-grade japonica rice analyzed by the TA-XT2i type instrument compared to the hybrid rice (raw rice for fortified rice) and japonica rice.
  Number of references:14
  Main heading:Extrusion
  Controlled terms:Gelation  -  High performance liquid chromatography  -  Scanning electron microscopy  -  Vitamins
  Uncontrolled terms:Apparent density  -  Extrusion technology  -  Fortified rice  -  Japonica rice  -  Micro-porous structure  -  Physicochemical property  -  Raw rice  -  Retention ratio  -  Scanning Electron Microscope  -  Starch gelatinization   -  Vitamin B  -  Water-soluble carbohydrates
  Classification code:535.2.2 Metal Forming Practice  -  741.1 Light/Optics  -  802.3 Chemical Operations  -  804.1 Organic Compounds
  DOI:10.6041/j.issn.1000-1298.2012.07.027
  Database:Compendex