|
2012年第43卷第12期共收录50篇
1. Accession number:20130315915061
Title:Stress and strain analysis in sliding contact with two fractal surfaces
Authors:Lai, Lianfeng1 ; Gao, Chenghui1 ; Huang, Jianmeng1
Author affiliation:1 School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Corresponding author:Gao, C. (gch@fzu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:278-282
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 2-D sliding model of micro-scale was established between two rough surfaces exhibiting fractal behavior, and the stress and strain was discussed by using the finite element analysis. A pair of asperities was analyzed take into account elastic- plastic material properties with material failure. The transient stress/strain distribution of the rough solid was presented. The numerical results showed that the equivalent plastic strain versus different depth which at different locations showed different laws. Failure began beneath the surface at the region of highest plastic strain. A shear stress zone exited at a certain depth from the contact surface in the rear of the contact asperity. This shear stress zone on the one hand prevented the crack from extending along the depth direction, on the other hand, prompted the crack along an extension of the parallel to the direction of the friction surface crack growth and leads to final fracture.
Number of references:23
Main heading:Surfaces
Controlled terms:Cracks - Elastoplasticity - Finite element method - Fractals - Plastic deformation - Shear stress - Surface defects
Uncontrolled terms:Contact surface - Equivalent plastic strain - Fractal behaviors - Fractal surfaces - Friction surfaces - Material failures - Micro-scales - Numerical results - Plastic materials - Rough surfaces - Sliding contacts - Sliding model - Stress and strain - Stress and strain analysis - Transient stress
Classification code:421 Strength of Building Materials; Mechanical Properties - 921 Mathematics - 921.6 Numerical Methods - 931 Classical Physics; Quantum Theory; Relativity - 951 Materials Science
DOI:10.6041/j.issn.1000-1298.2012.12.050
Database:Compendex 2. Accession number:20130315915052
Title:Intelligent measurement and control system of facility agriculture based on ZigBee and 3G
Authors:Sheng, Ping1 ; Guo, Yangyang1 ; Li, Pingping2
Author affiliation:1 School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang 212013, China
2 Nanjing Forestry University, Nanjing 210037, China
Corresponding author:Sheng, P. (pingsheng@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:12
Issue date:December 2012
Publication year:2012
Pages:229-233
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Aimed at meeting the requirements of facility agriculture precision control, a kind of high efficient remote precise measurement and control system of facility agricultural based on ZigBee and 3G is proposed. Through the ZigBee wireless sensor network, the system realize the collection of local environmental information and upload the data to the embedded server. The system connect internet through 3G network, which could construct a big range and low cost wireless network. B/S (Browser/Server) structure was used in the system, which could realize remote real-time monitoring environmental data information and video information. The embedded expert system model make this system automatic and intelligent. The experimental results showed that the performance of the system was quite stable and the system satisfied the design requirements in real-time data acquisition wirelessly, environmental automatic control and environmental visualization control remotely. And this system has a very well real-time nature and expansibility. The system has a good application prospect in automatic and intelligent facility agriculture.
Number of references:14
Main heading:Zigbee
Controlled terms:Agriculture - Automation - Control systems - Expert systems
Uncontrolled terms:3G - 3G Networks - Application prospect - Browser/server - Design requirements - Embedded expert system - Environmental data - Environmental information - Environmental visualization - Facility agricultures - Intelligent measurement - Low costs - Precise measurements - Precision control - Real time monitoring - Real-time data acquisition - Remote measurement - Video information
Classification code:722.3 Data Communication, Equipment and Techniques - 723.4.1 Expert Systems - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 732 Control Devices - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.6041/j.issn.1000-1298.2012.12.041
Database:Compendex 3. Accession number:20130315915059
Title:Milling forces model of spiral taper gear using form milling
Authors:Jia, Xinjie1 ; Deng, Xiaozhong2 ; Su, Jianxin2
Author affiliation:1 School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
2 School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China
Corresponding author:Deng, X. (dxz01@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:268-272
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 geometrical theory of the form milling the spiral taper gear, the computational formula of the cutting thickness and cutting width in every time was deduced. The milling force model for form milling the spiral taper gear was presented. The milling force factors were calibrated via single factor experimentations and the form milling force simulation programs were prepared. Experimental installations were designed to validate the availability of the milling force model. Comparison between the computational results and experimental observations confirmed the validity deviation of the proposed model was within ±15%.
Number of references:12
Main heading:Milling (machining)
Controlled terms:Gear cutting
Uncontrolled terms:Computational formula - Computational results - Cutting width - Experimental installations - Experimental observation - Geometrical theory - Milling force - Milling force models - Simulation program
Classification code:604.1 Metal Cutting - 604.2 Machining Operations
DOI:10.6041/j.issn.1000-1298.2012.12.048
Database:Compendex 4. Accession number:20130315915036
Title:Quality recognition of Xihu longjing tea based on intelligent olfactory
Authors:Shi, Bolin1 ; Zhao, Lei1 ; Zhi, Ruicong1 ; Xi, Xingjun1 ; Zhu, Dazhou2
Author affiliation:1 Food and Agriculture Standardization Institute, China National Institute of Standardization, Beijing 100088, China
2 National Research Center of Intelligent Equipment for Agriculture, Beijing 100097, China
Corresponding author:Zhao, L. (zhaolei@cnis.gov.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:130-135
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 intelligent olfactory spectrograms of Xihu Longjing tea were collected by electronic nose. The spectrograms scores matrix that obtained by principal component analysis was applied. The influence of the information from grading, tree varieties and producing areas on quality of tea was analyzed. The soft independent modeling of class analogy was used to establish three kinds of models for grading, tree varieties and producing areas, respectively. Results showed that the intelligent olfactory spectrograms from different grading tea had the most difference than the other two elements. The grading discrimination model had well performance with about 100% correct rate to predict top grade teas. Meanwhile, the influences of tree varieties and location on the tea quality were seemed to be similar. Under the same grade and same producing area, the tree varieties discrimination model of tea was built. Also, the producing area discrimination model of tea was built. The correct rates of the two models were all over 92%. On the basis of above study, the quick detection strategy of Xihu Longjing tea by intelligent olfactory technology was presented, that is, grading demarcation, tree varieties identification and producing area distinguishing under the same grading were carried out in turn.
Number of references:18
Main heading:Grading
Controlled terms:Forestry - Principal component analysis - Spectrographs
Uncontrolled terms:Characteristics recognition - Discrimination model - Electronic NOSE - Intelligent olfactory - Quality recognition - Soft independent modeling of class analogies - Spectrograms - Well performance - Xihu Longjing tea
Classification code:801 Chemistry - 821.0 Woodlands and Forestry - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics
DOI:10.6041/j.issn.1000-1298.2012.12.024
Database:Compendex 5. Accession number:20130315915057
Title:Flow distribution characteristics of deflector in micro channel heat exchanger
Authors:Liu, Wei1 ; Zhu, Chunling1
Author affiliation:1 College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Corresponding author:Zhu, C. (clzhu@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:12
Issue date:December 2012
Publication year:2012
Pages:257-261
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:Four different test samples (no deflector, deflector with one hole, deflector with five holes, and deflector with twelve holes in the manifold) of micro-channel evaporator with parallel flow were processed. Flow distribution characteristics of deflectors were experimentally studied with water as the working fluid. The results showed that when the entrance Reynolds number was less than 3 000, the influence of which on the flow distribution characteristics of both the samples without deflector and with the deflector with one hole was apparent, and the flow distribution uniformity and stability of the two test samples were poor, but the sample without deflector was better than the deflector with one hole. After the entrance Reynolds number was more than 3 000, the uniformity and stability of the deflector with one hole was becoming better, but the uniformity of the sample without deflector was the worst in four of the test samples. The deflector with five holes had the good and stable flow distribution uniformity when the Reynolds number was less than 4 000. As the Reynolds number was more than 4 000, the flow distribution uniformity was worse. In comparison, the flow distribution uniformity and stability of the deflector with twelve holes were always the best in all the test samples, and as the entrance Reynolds number increased, the uniformity of flow distribution was improved slightly.
Number of references:11
Main heading:Reynolds number
Controlled terms:Experiments - Heat exchangers
Uncontrolled terms:Deflector - Flow distribution - Flow distribution uniformities - Stable flows - Test samples - Working fluid
Classification code:616.1 Heat Exchange Equipment and Components - 631.1 Fluid Flow, General - 901.3 Engineering Research
DOI:10.6041/j.issn.1000-1298.2012.12.046
Database:Compendex 6. Accession number:20130315915018
Title:State estimation for 4WD vehicle based on information of tyre force sensor
Authors:Gao, Bolin1 ; Chen, Hui1
Author affiliation:1 Clean Energy Automotive Engineering Center, Tongji University, Shanghai 200092, China
Corresponding author:Chen, H. (hui-chen@mail.tongji.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:22-27
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 state estimation method for 4WD vehicle was demonstrated by measuring lateral tire forces and longitudinal tire forces. Based on 3-DOF vehicle model, a state observer was realized using extended Kalman filter technique. The observer provided several advantages that the vehicle velocity and sideslip angle estimates could be robust with variance of wheel slip ratio and road friction under extreme adherence condition, such as split friction road. The paper demonstrated the appropriateness of this observer by slalom simulation test using veDYNA software. Simulation results were compared with traditional nonlinear state observer. The comparisons indicated that the longitudinal velocity and sideslip angle estimates of proposed observer both approached the true value very well. The maximum errors were no more 0.6 km/h and 0.2°, comparing to 25 km/h and 3° of the maximum errors of traditional nonlinear state observer. The proposed estimation method was an effective self- adaptation approach to wheel slip ratio and road friction condition.
Number of references:11
Main heading:State estimation
Controlled terms:Errors - Estimation - Extended Kalman filters - Friction - Roads and streets - Sensors - Software testing - Tribology - Vehicles - Wheels
Uncontrolled terms:Estimation methods - Kalman filter technique - Lateral tire force - Longitudinal velocity - Maximum error - Nonlinear state - Road friction - Sideslip angles - Simulation tests - State estimation methods - State observer - Tire forces - Tyre forces - Vehicle model - Vehicle velocity - Wheel slips
Classification code:931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 921 Mathematics - 801 Chemistry - 731.1 Control Systems - 723.5 Computer Applications - 601.2 Machine Components - 432 Highway Transportation - 406.2 Roads and Streets
DOI:10.6041/j.issn.1000-1298.2012.12.005
Database:Compendex 7. Accession number:20130315915014
Title:Simulation and experiment of vehicle inerter suspension system
Authors:Wang, Ruochen1 ; Chen, Bing1 ; Zhang, Xiaoliang1 ; Chen, Long1 ; Jiang, Haobin1
Author affiliation:1 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Wang, R. (wangruochen@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:12
Issue date:December 2012
Publication year:2012
Pages:1-4
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Two types of suspension with inerters were designed. The mathematical model of suspension with inerters was built. The suspension with inerters ofIandIItypes were set up. With the multi-objective optimization methods, the performance parameters of the two types were obtained. Based on the simulation, the bench test was done and the simulation was consistent with the test results. It shows that the suspension with inerters exerts the feature that spring was phase leg, damper was neutral and inerters was phase advance. The vehicle vibration isolation performance was increased and the comprehensive performance of vehicle was coordinated.
Number of references:17
Main heading:Automobile suspensions
Controlled terms:Experiments - Mathematical models - Multiobjective optimization - Suspensions (components) - Suspensions (fluids) - Vehicles - Vibrations (mechanical)
Uncontrolled terms:Bench tests - Comprehensive performance - Inerter - Multi objective optimizations (MOO) - Performance parameters - Phase advance - Simulation - Suspension system - Vehicle vibrations
Classification code:921.5 Optimization Techniques - 921 Mathematics - 901.3 Engineering Research - 931.1 Mechanics - 804 Chemical Products Generally - 601.2 Machine Components - 432 Highway Transportation - 632.1 Hydraulics
DOI:10.6041/j.issn.1000-1298.2012.12.001
Database:Compendex 8. Accession number:20130315915046
Title:Detection of surface defects on fruits using spherical intensity transformation
Authors:Huang, Wenqian1, 2 ; Li, Jiangbo2 ; Zhang, Chi2 ; Li, Bin2 ; Chen, Liping2 ; Zhang, Baihai1
Author affiliation:1 School of Automation, Beijing Institute of Technology, Beijing 100081, China
2 National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Zhang, B. (smczhang@bit.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:187-191
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 non-uniform intensity distribution on the fruit's images is the main reason resulting in the difficulty and low accuracy of surface defects detection by using a machine vision system. A detection system based on Vis-NIR double CCDs was built for detecting surface defects on 'Akesu' apples. A spherical intensity transformation method (SITM) was proposed to transform the R channel image of an apple, which enhanced the intensity uniformity of the normal regions and kept the low intensity of the defected regions in an apple. The intensity contrast between the defect regions and those of normal tissue was also improved, which increased the defect detection accuracy. A defect detection algorithm was developed based on the SITM and 100 apples consisting of 45 defected apples and 55 intact apples were used to evaluate the performance of the algorithm. Results showed that 93.3% of defected apples were correctly classified and 100% of the intact apples were correctly recognized. The overall detection accuracy was 97%. It is feasible to extract the surface defects on apples using the proposed SITM combining with a single threshold segmentation method.
Number of references:16
Main heading:Fruits
Controlled terms:Computer vision - Defects - Spheres - Surface defects - Tissue
Uncontrolled terms:Apple - Defect detection - Defect detection algorithm - Defects detection - Detection accuracy - Detection system - Intensity distribution - Low-intensity - Machine vision systems - Normal tissue - Spherical intensity transformation - Threshold segmentation - Transformation methods
Classification code:951 Materials Science - 821.4 Agricultural Products - 723.5 Computer Applications - 631 Fluid Flow - 461.2 Biological Materials and Tissue Engineering - 423 Non Mechanical Properties and Tests of Building Materials - 421 Strength of Building Materials; Mechanical Properties
DOI:10.6041/j.issn.1000-1298.2012.12.034
Database:Compendex 9. Accession number:20130315915051
Title:3-D steady simulation of temperature pattern inside single plastic greenhouse using CFD
Authors:Hao, Feilin1 ; Shen, Mingwei2 ; Zhang, Ya3
Author affiliation:1 College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
2 School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
3 Research Institute of Vegetable Cultivation, Hangzhou Agricultural Academy, Hangzhou 310024, China
Corresponding author:Shen, M. (shenhao@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:12
Issue date:December 2012
Publication year:2012
Pages:222-228
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To explore the temperature distribution in the simple plastic greenhouse of south China, a model was established including component of inner and outer space, inside plant and soil layer, etc. Based on analysis of solar radiation and heat exchange between different components, 3-D steady simulation of temperature distribution was carried out in greenhouse. The Monte Carlo model was adopted in thermal radiation and transfer process, shear stress transport (SST) model was used in air turbulence analysis, and the crop was simplified as continuum. The result showed that the value of simulation was a bit higher than that of the measurement. The absolute error was below 2.2°C and relative error was 6.7%. The airflow had an obvious effect on temperature distribution and fluctuation, and the temperature of inlet side was lower than that of outlet side. It seems feasible to consider the crop as continuum in simulation model in this case, while the simulation value showed a bit higher.
Number of references:18
Main heading:Computer simulation
Controlled terms:Computational fluid dynamics - Crops - Geologic models - Greenhouses - Sun - Temperature distribution - Three dimensional computer graphics
Uncontrolled terms:Absolute error - Air turbulence - CFD simulations - Heat exchange - Monte Carlo model - Outer space - Plastic greenhouse - Relative errors - Shear-stress transport - Simulation model - Soil layer - South China - Steady simulation - Temperature patterns - Transfer process
Classification code:481.1 Geology - 641.1 Thermodynamics - 657.2 Extraterrestrial Physics and Stellar Phenomena - 723.5 Computer Applications - 821.4 Agricultural Products - 821.6 Farm Buildings and Other Structures
DOI:10.6041/j.issn.1000-1298.2012.12.040
Database:Compendex 10. Accession number:20130315915058
Title:Fine experiment and finite element analysis for static stiffness of vertical machining center
Authors:Li, Dianxin1 ; Zhao, Yanmin1 ; Zhang, Jianfu1 ; Feng, Pingfa1
Author affiliation:1 Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
Corresponding author:Feng, P. (fengpf@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:12
Issue date:December 2012
Publication year:2012
Pages:262-267 277
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Static stiffness of a vertical machining center was researched based on fine experiment and finite element method. Static stiffness of three directions and deformation of the main parts were measured. Deformation of the spindle box was measured and detailed analysis was taken. Deformation of the joint between spindle box and column was measured. The results showed that weak leak of the joint is y direction. Finite element model of the machining center was established in Workbench and accuracy of the model was verified compared with experiments.
Number of references:10
Main heading:Finite element method
Controlled terms:Deformation - Experiments - Machining centers - Stiffness
Uncontrolled terms:Finite element models - Performance analysis - Static stiffness - Vertical machining
Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 603.1 Machine Tools, General - 901.3 Engineering Research - 921.6 Numerical Methods - 951 Materials Science
DOI:10.6041/j.issn.1000-1298.2012.12.047
Database:Compendex 11. Accession number:20130315915024
Title:Seeding accuracy test experiment based on soil substrate
Authors:Zhang, Junxiong1 ; Ma, Zenghong1 ; Li, Wei1 ; Song, Peng1 ; Dong, Xiangqian1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Zhang, J. (mech18@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:12
Issue date:December 2012
Publication year:2012
Pages:62-66 71
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 seeding accuracy test experiment based on soil substrate was investigated. The moving trolley carried the sowing seeders. Meanwhile, the machine vision system sequential images dynamically were collected. Using encoder and PLC etc., it realized to control camera to collect sequential images through detecting the motion distance of trolley, which realized hardware splicing of the sequential images. In addition of splicing algorithm of image processing, the identification of seeds and the total splicing of the sequential images were completed. Experimental results showed that the matching rate of seed spacing was above 85%, and the accuracy rate of seed spacing was more than 70%. The experiment was repeated many times. The absolute error of the seeding accuracy data was within 4%.
Number of references:11
Main heading:Soils
Controlled terms:Computer vision - Experiments - Image processing
Uncontrolled terms:Absolute error - Accuracy rate - Accuracy test - Machine vision systems - Seed spacing - Seeder - Sequential images
Classification code:483.1 Soils and Soil Mechanics - 741 Light, Optics and Optical Devices - 741.2 Vision - 901.3 Engineering Research
DOI:10.6041/j.issn.1000-1298.2012.12.012
Database:Compendex 12. Accession number:20130315915031
Title:Starting performance effects of combining angle on combined type VAWT
Authors:Li, Yan1 ; Tian, Wenqiang1 ; Feng, Fang2 ; Ding, Guoqi1 ; He, Qingbin1
Author affiliation:1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
2 College of Science, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Li, Y. (ly_neau@yahoo.com.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:102-106
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 Savonius rotor is an important way to improve starting performance of straight-bladed vertical axis wind turbine (SB-VAWT). The starting performance of the combined type VAWT was largely affected by the combining angle of the two type turbines. Firstly, an SB-VAWT with NACA0018 and FX63-145 airfoils and a Savonius rotor were made and their starting performances were respectively tested. Then, optimal starting performance area of Savonius rotor was respectively combined with optimal starting performance area and the worse starting performance of SB-VAWT, starting performances of combined type VAWT with four different combining ways were tested by using a wind tunnel. For SB-VAWT with symmetrical airfoils, better starting performance of combined type VAWT can be obtained when its optimal starting performance area was combined with Savonius rotor. For SB-VAWT with asymmetric airfoils, both of the two ways have advantages and disadvantages.
Number of references:12
Main heading:Optimization
Controlled terms:Airfoils - Wind turbines
Uncontrolled terms:Combined type - Combining angle - Savonius rotor - SB-VAWT - Starting performance - Wind tunnel tests
Classification code:615.8 Wind Power (Before 1993, use code 611 ) - 652.1 Aircraft, General - 921.5 Optimization Techniques
DOI:10.6041/j.issn.1000-1298.2012.12.019
Database:Compendex 13. Accession number:20130315915035
Title:Farm products quality safety emergency management system based on rough set and WebGIS
Authors:Qian, Jianping1, 2 ; Wu, Xiaoming1 ; Yang, Xinting1 ; Xing, Bin1 ; Wang, Fengli1
Author affiliation:1 National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
2 School of Information Science and Technology, Beijing Forestry University, Beijing 100083, 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:12
Issue date:December 2012
Publication year:2012
Pages:123-129
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:According to the characteristics of farm products quality safety incidents, ten samples were processed by the reduction and analysis of attributes using the rough set method, and five indexes were determined. The indexes was toxicity of pollution source, scope of pollution influence, number of death, number of injuries and population density, whose weights were 0.2, 0.2, 0.1, 0.3 and 0.2, respectively, according to the importance analysis of the indexes. Based on these, a grade evaluation model of farm products quality safety accidents was established. An emergency management system of farm products quality safety was designed and implemented by programming the grade evaluation model using WebGIS. Through simulating a particular farm products quality safety accident, the result showed that the system could improve the handling ability of the accident, and realized the visualization of the disposal process. The system can provide consultation for farm products quality safety management.
Number of references:17
Main heading:Rough set theory
Controlled terms:Accidents - Civil defense - Disasters - Pollution - Population statistics - Risk management
Uncontrolled terms:Disposal process - Emergency management - Emergency management systems - Evaluation models - Importance analysis - Pollution sources - Population densities - Products quality - Quality safety - Rough set - Web-GIS
Classification code:404.2 Civil Defense - 454.2 Environmental Impact and Protection - 914.1 Accidents and Accident Prevention - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 922.1 Probability Theory - 922.2 Mathematical Statistics
DOI:10.6041/j.issn.1000-1298.2012.12.023
Database:Compendex 14. Accession number:20130315915025
Title:Corn seed damaging experiment in truncated cone precision metering
Authors:Xia, Lianming1 ; Wang, Xiangyou1 ; Geng, Duanyang1
Author affiliation:1 School of Agricultural and Food Engineering, Shangdong University of Technology, Zibo 255049, China
Corresponding author:Wang, X. (wxy@sdut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:67-71
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 problem of high seed damaging, a precision metering was proposed based on the pelleted corn seeds.The two times orthogonal rotational regressive tests were designed in the experiments. The rotary speed, diameter of the cell, cone angle of the metering seeding plate were defined as input parameters and seed damaging index was defined as output parameters. The regression mathematics models between output parameters and input parameters were established and then parameters were optimized through Design-Expert 7.1. The optimal combination was that the rotary speed of 13.2 r/min, diameter of the cell of 16 mm, cone angle of the metering seeding plate of 26.5°, at that time the seed damaging index of 0.65%. Confirmatory tests showed that the inaccuracy was little.
Number of references:10
Main heading:Pelletizing
Controlled terms:Experiments - Optimization
Uncontrolled terms:Cone angle - Confirmatory test - Corn seeds - Damage - Design-expert - Input parameter - Mathematics model - Metering devices - Optimal combination - Output parameters - Pelleted corn - Precision metering - Rotary speed - Truncated cone
Classification code:802.3 Chemical Operations - 901.3 Engineering Research - 921.5 Optimization Techniques
DOI:10.6041/j.issn.1000-1298.2012.12.013
Database:Compendex 15. Accession number:20130315915030
Title:Effects of geometrical parameters of improved gurney flap on airfoil aerodynamic characteristics
Authors:Zhang, Xu1 ; Li, Wei2 ; Xing, Jingzhong1 ; Xiao, Xia1
Author affiliation:1 Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin Polytechnic University, Tianjin 300387, China
2 School of Energy and Safety Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China
Corresponding author:Zhang, X. (zhangxu@tjpu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:43
Issue:12
Issue date:December 2012
Publication year:2012
Pages:97-101 106
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 trailing edge of wind turbine airfoil S822 was modified by a |
