2010年第41卷第3期共收錄46篇
1. Accession number: 20101912918701
Title: Image feature extraction of cotton foreign fibre
Authors: Liu, Shuangxi1 ; Zhang, Xin1 ; Zheng, Wenxiu1 ; Wang, Jinxing1
Author affiliation: 1 College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Corresponding author: Wang, J. (jinxingw@sdau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 158-162
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: For the existence of foreign fibre during cotton processing, machine vision technology and image processing were used in order to not only extract foreign fibre goals, but also collect characteristic data of foreign fibre. Decision tree theory and feature vectors extracted were used to recognize foreign fibre after eigenvectors of aimed foreign images were effectively extracted through an improved version of rough set theory. Experimental results showed that feature vectors extracted from the image of foreign fibre for the identification of cotton foreign fibre was effective and the recognition rate reached more than 95%.
Number of references: 17
Main heading: Rough set theory
Controlled terms: Computer vision - Cotton - Decision trees - Feature extraction - Fibers
Uncontrolled terms: Cotton processing - Decision tree theory - Eigenvectors - Feature vectors - Foreign fibre - Image feature extractions - Machine vision technologies - Recognition rates - Rough set
Classification code: 819.1 Natural Fibers - 819.4 Fiber Products - 821.4 Agricultural Products - 912.1 Industrial Engineering - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 922 Statistical Methods - 961 Systems Science - 817 Plastics and Other Polymers: Products and Applications - 716 Telecommunication; Radar, Radio and Television - 723.5 Computer Applications - 731.6 Robot Applications - 741.1 Light/Optics - 741.2 Vision - 751.1 Acoustic Waves - 812 Ceramics, Refractories and Glass
DOI: 10.3969/j.issn.1000-1298.2010.03.033
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
2. Accession number: 20101912918675
Title: Lifting synchronization control for interconnected hydro-pneumatic suspension
Authors: Du, Heng1 ; Wei, Jianhua1 ; Kong, Xiaowu1
Author affiliation: 1 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Corresponding author: Du, H. (duheng20082008@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 29-32 90
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 flow control valve and pressure following element, an improved interconnected hydro-pneumatic suspension was presented. The suspension system achieved rigid-flexible status switching smoothly through effective combination of flow control valve and pressure following element, lifting synchronization of heavy construction vehicle was finally realized. Hydraulic system simulation model of interconnected hydro-pneumatic suspension was established in AMESim and simulation analyses for synchronization performance were carried out at variable load conditions. The test bench was set up and the experimental research was performed. Experimental results showed that synchronization error was less than 2.5mm in the lifting process and suspension cylinder did not appear jitter when rigid-flexible status switching. The agreement between the simulation results and the experimental data proved the feasibility of the improved interconnected hydro-pneumatic suspension and the accuracy of the simulation model.
Number of references: 9
Main heading: Suspensions (components)
Controlled terms: Computer simulation - Flow control - Hydraulic equipment - Jitter - Pneumatic control - Safety valves - Suspensions (fluids) - Synchronization - Three term control systems
Uncontrolled terms: Experimental data - Experimental research - Flow control valves - Heavy construction - Hydraulic system - Hydro-pneumatic suspension - Lifting process - Lifting synchronization - On flow - Rigid-flexible - Simulation analysis - Simulation model - Simulation result - Status switching - Suspension system - Synchronization control - Synchronization error - Synchronization performance - Test benches - Variable loads
Classification code: 722.3 Data Communication, Equipment and Techniques - 723.5 Computer Applications - 731.1 Control Systems - 961 Systems Science - 731.3 Specific Variables Control - 804 Chemical Products Generally - 914.1 Accidents and Accident Prevention - 801.3 Colloid Chemistry - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 601.2 Machine Components - 619.1.1 Pipe Accessories - 631.1 Fluid Flow, General - 632.2 Hydraulic Equipment and Machinery - 632.3 Pneumatics - 716 Telecommunication; Radar, Radio and Television
DOI: 10.3969/j.issn.1000-1298.2010.03.007
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
3. Accession number: 20101912918713
Title: Method and experiment for increasing effective fluid bulk modulus in hydraulic systems
Authors: Feng, Bin1 ; Gong, Guofang1 ; Yang, Huayong1
Author affiliation: 1 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Corresponding author: Feng, B. (abbottfeng@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 219-222
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: Effective fluid bulk modulus is an important parameter in hydraulic systems. The major factors of effective fluid bulk modulus were analyzed, and a mathematical model with entrapped air content and working pressure at constant temperature was developed. A device for removing air content based on the method of vacuum-pumping in a closed reservoir was developed to increase bulk modulus. And bulk modulus was measured by the device when vacuum-pumping had been completed. Experiments were carried out in a large hydraulic system, and the results showed that vacuum-pumping is an effective method to reduce air content, and the device increased fluid bulk modulus from 821.3MPa to 1201MPa. Bulk modulus can be improved by using this method in the closed hydraulic system.
Number of references: 8
Main heading: Hydraulic equipment
Controlled terms: Air - Elastic moduli - Experiments - Hydraulics - Mathematical models - Pumps - Vacuum
Uncontrolled terms: Air content - Bulk modulus - Closed reservoir - Constant temperature - Effective fluid bulk modulus - Fluid bulk modulus - Hydraulic system - Working pressures
Classification code: 921 Mathematics - 901.3 Engineering Research - 804 Chemical Products Generally - 633 Vacuum Technology - 951 Materials Science - 632.2 Hydraulic Equipment and Machinery - 618.2 Pumps - 422.2 Test Methods - 421 Strength of Building Materials; Mechanical Properties - 632.1 Hydraulics
DOI: 10.3969/j.issn.1000-1298.2010.03.045
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
4. Accession number: 20101912918680
Title: Study and application on sampling test plan of water-saving irrigation products based on bayes method
Authors: Zhao, Hua1 ; Xu, Di1
Author affiliation: 1 National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100044, China
Corresponding author: Xu, D. (xudi@iwhr.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 56-61
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 Bayes method sampling plan of water saving irrigation products was established by using the prior data and experiment. The Bayes sampling plan results of plastic pipes, micro-irrigation emitters and rotating sprinkler were collected and showed the sample decrease ratio E mainly had a relationship with prior product qualified ratio variance SR2 and average Ra. In normal lot it was less than 1200, if SR2 =0.002 and Ra =0.95, sample decrease ratio of plastic pipes and micro-irrigation emitters was higher than 62%, also sample decrease ratio of rotating sprinkler was higher than 85%. Compared with normal sampling plan, the Bayes sampling plan could reduce the sampling number more than 20% in the condition of same inspection effect; therefore the Bayes sampling plan reached the purpose of reducing the sampling number, lowering the inspection cost and increasing the inspection benefit.
Number of references: 17
Main heading: Sprinkler systems (irrigation)
Controlled terms: Cost reduction - Inspection - Plastic pipe - Plastics - Rotation - Water conservation
Uncontrolled terms: Bayes method - Inspection costs - Microirrigation - Product quality - Sampling plans - Sampling test - Study and applications - Water-saving irrigation
Classification code: 913.3.1 Inspection - 912.2 Management - 911.2 Industrial Economics - 821.1 Agricultural Machinery and Equipment - 931.1 Mechanics - 817.1 Polymer Products - 601.1 Mechanical Devices - 444 Water Resources - 403.1 Urban Planning and Development - 619.1 Pipe, Piping and Pipelines
DOI:10.3969/j.issn.1000-1298.2010.03.012
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
5. Accession number: 20101912918700
Title: Effect of addition of ultra-high pressure treated wheat gluten on the quality of noodle
Authors: Jiang, Shaotong1 ; Zhong, Xiyang1 ; Pan, Lijun1 ; Dan, Xianlong1 ; Ma, Daorong1
Author affiliation: 1 School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Jiang, S. (jiangshaotong@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 153-157 168
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 denaturalization mechanism of ultra-high pressure treated wheat gluten (room temperature, 400MPa, 10min) was studied by scanning electron microscope and DSC, and the effects of ultra-high pressure treated wheat gluten and ordinary wheat gluten on the quality of noodle were investigated by sensory evaluation, texture analyzer and farinograph. The results indicated that ultra-high pressure treatment increased the crosslinked extent of wheat gluten and the temperature of denaturalized peak was changed from 117.02°C to 119.76°C.Ultra-high pressure treated wheat gluten and ordinary wheat gluten could improve the wet gluten content of flour, and greatly influenced the noodle's sensory evaluation score, breaking force and hardness under the addition amount from zero to 3.5%. The quality of noodles processed with ultra-high pressure treated wheat gluten was better than ordinary wheat gluten at the same addition amount( p<0.05), and the optimal addition amount of ultra-high pressure treated wheat gluten was 3%. Compared with ordinary wheat gluten, the farinograph property of flour added with 3% ultra-high pressure treated wheat gluten was also better.
Number of references: 14
Main heading: High pressure effects
Controlled terms: Scanning electron microscopy
Uncontrolled terms: Breaking force - Crosslinked - Effect of addition - Farinographs - High pressure - Processing quality - Room temperature - Scanning Electron Microscope - Sensory evaluation - Texture analyzers - Ultra-high pressure technology - Ultra-high pressure treatment - Ultrahigh pressure - Wheat gluten
Classification code: 741.1 Light/Optics - 931.2 Physical Properties of Gases, Liquids and Solids
DOI: 10.3969/j.issn.1000-1298.2010.03.032
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
6. Accession number: 20101912918710
Title: Modeling and prediction of non-free-cutting parameters on micro-cutting with rounded-edge tool
Authors: Liu, Zhibing1 ; Wang, Xibin1 ; Fang, Zeping1
Author affiliation: 1 Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Liu, Z. (liuzhibing@bit.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 204-208
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Non-free-cutting is an effect which affects the mechanism of micro cutting greatly. The influence of cutting intervene between elementary cutting tool on chip flow direction was analyzed, and chip flow intervene of the rounded-edge tool was mathematically modeled aims at the increase of cutting intervene caused by chip flow in the rounded-edge of micro cutting tool. Furthermore, chip flow direction, equivalent cutting edge and chip flow angle were deduced with Stabler rule and minimal energy dispersion principle respectively. Those above parameters were numerical predicted under different feed rate and cutting depth, and the prediction results can be used for the evaluation and improvement of micro-cutting status, as well as the optimization of cutting regimes.
Number of references: 10
Main heading: Cutting
Controlled terms: Cutting tools - Dispersions - Machine tools - Metal working tools - Micromachining
Uncontrolled terms: Chip flow angle - Cutting coefficients - Cutting edges - Micro-cutting - Minimal energy - Minimal energy dispersion
Classification code: 801.3 Colloid Chemistry - 606.2 Abrasive Devices and Processes - 605 Small Tools and Hardware - 951 Materials Science - 604.2 Machining Operations - 603.2 Machine Tool Accessories - 603.1 Machine Tools, General - 604.1 Metal Cutting
DOI: 10.3969/j.issn.1000-1298.2010.03.042
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
7. Accession number: 20101912918702
Title: Improved LEACH algorithm with coexistence of single-hop and multi-hop based on the farm fields
Authors: Shen, Mingxia1 ; Ma, Fengxian1 ; Sun, Yuwen1 ; Zhou, Liang1 ; Lin, Xiangze2 ; Xiong, Yingjun1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
2 School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China
Corresponding author: Shen, M. (mingxia@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 163-168
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 improvement of LEACH algorithm was proposed, named LEACHSMC. The LEACHSMC protocol algorithm was carried out round by round, and every round was divided into two sections of setup phase and steady station. A critical distance was specified for every cluster head to judge when to use the single-hop or the multi-hop mode between the cluster heads and the base station. The coverage area was greatly improved by the multi-hop manner, and this manner also provided practical value in the nodes distribution in the farm field. It was effective for transmitting the message by single-hop mode, and it could greatly reduce the information delay and packet loss rate too. The coexistence of single-hop and multi-hop can combine the advantages. Simulation results demonstrated that LEACHSMC protocol could increase network effective coverage area and prolong the network lifetime.
Number of references: 11
Main heading: Wireless sensor networks
Controlled terms: Algorithms - Computer simulation - Farms - Image resolution - Leaching - Network protocols - Sensor networks
Uncontrolled terms: Cluster head - Coverage area - Critical distance - Information collections - Information delays - LEACH algorithm - Multihop - Network lifetime - Packet loss rates - Set-up phase - Simulation result - Single-hop - Two section
Classification code: 731.1 Control Systems - 732 Control Devices - 741 Light, Optics and Optical Devices - 742 Cameras and Photography - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics - 723.5 Computer Applications - 533.1 Ore Treatment - 716.3 Radio Systems and Equipment - 716.4 Television Systems and Equipment - 722.3 Data Communication, Equipment and Techniques - 722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing
DOI: 10.3969/j.issn.1000-1298.2010.03.034
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
8. Accession number: 20101912918703
Title: Grape inspection and grading system based on computer vision
Authors: Chen, Ying1 ; Liao, Tao1 ; Lin, Chukao1 ; Wan, Hu1 ; Li, Wei1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Chen, Y. (cy@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 169-172
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A grape grading system based on computer vision was developed. The system consisted of 5 parts: the driving unit, conveying unit, holding unit, image grabbing-processing unit and grading control unit. Through a special chain, bunches of grapes were hung and conveyed continuously along a path. Two CCD cameras were installed to capture two images from two sides of each bunch simultaneously under external trigger motion. The color feature was extracted on RGB space, the size and shape features were calculated from the projection area and pixel accumulation curve. Then external inspection and grading of grapes were conducted. Twenty bunches of grapes were graded on the system for three times. Experiments showed that the accuracy was 90% for color grading and 88.3% for size-shape grading. The grapes were not damaged during grading.
Number of references: 12
Main heading: Grading
Controlled terms: Cameras - Computer vision - Fruits - Imaging systems
Uncontrolled terms: Color features - Color grading - Control unit - Conveying units - Grading system - Grapes - Processing units - Projection area - RGB space - Size and shape
Classification code: 913.3 Quality Assurance and Control - 821.4 Agricultural Products - 746 Imaging Techniques - 742.2 Photographic Equipment - 741.2 Vision - 741 Light, Optics and Optical Devices - 731.6 Robot Applications - 723.5 Computer Applications - 723.2 Data Processing and Image Processing
DOI: 10.3969/j.issn.1000-1298.2010.03.035
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
9. Accession number: 20101912918691
Title: Improving and optimizing the LSSVM model of the rice straw gasification tar removal process by catalytic cracking
Authors: Li, Dazhong1 ; Wang, Hui1
Author affiliation: 1 Department of Automation, North China Electric Power University, Baoding 071003, 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: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 109-112
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The LSSVM model of the rice straw gasification tar removal process by the catalytic cracking was improved. Linear kernel function was chosen as the kernel function of the model. Moreover, the validation of the improved model was conducted. On this basis, an optimized calculation of the rice straw gasification tar removal process by the catalytic cracking was done. The results indicated that the improved model had better simulation effects and generalization ability, and when the catalytic cracking temperature reached 949.1356°C, the gas residence time was 0.9819s, the maximum of the tar catalytic cracking rate can be 98.6877%.
Number of references: 15
Main heading: Catalytic cracking
Controlled terms: Computer simulation - Gas generators - Gasification - Optimization - Tar
Uncontrolled terms: Gas residence - Gasification model - Generalization ability - Improved models - Kernel function - Linear kernel functions - Rice straw - Rice straws - Tar removal
Classification code: 921.5 Optimization Techniques - 804 Chemical Products Generally - 802.3 Chemical Operations - 802.2 Chemical Reactions - 802.1 Chemical Plants and Equipment - 723.5 Computer Applications - 524 Solid Fuels - 522 Gas Fuels - 513.1 Petroleum Refining, General - 513 Petroleum Refining - 411 Bituminous Materials
DOI: 10.3969/j.issn.1000-1298.2010.03.023
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
10. Accession number: 20101912918706
Title: Design model for the combinatorial complexity elimination process
Authors: Zhang, Peng1 ; Tan, Runhua1
Author affiliation: 1 School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
Corresponding author: Zhang, P. (zhang_peng_2009@sina.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 182-188
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 process of transforming the combinatorial complexity in the system to the periodic one which contained in the complexity theory based on axiomatic design put forward by Suh was analyzed. Meanwhile, through the integration of c/p transformation and TRIZ theory, a design model for the combinatorial complexity elimination process was proposed. Firstly, the combinatorial complexity exists in the system was judged, and the functional structure to determine the functions that led to the time-dependent combinatorial complexity of the system was drawn. Then, the functions were analyzed with TRIZ tools, and a reasonable combinatorial complexity of the functional period was put forward. Finally, the virtual functional period description was transformed to an improved design plan. It was verified by the engineering practice of "capacitive online thickness measurement system".
Number of references: 10
Main heading: Design
Controlled terms: Thickness measurement
Uncontrolled terms: Axiomatic design - Combinatorial complexity - Complexity design - Complexity theory - Design models - Design plans - Elimination process - Engineering practices - Functional structure - Time-dependent
Classification code: 408 Structural Design - 423.2 Test Methods - 902.1 Engineering Graphics - 943.2 Mechanical Variables Measurements - 943.3 Special Purpose Instruments
DOI: 10.3969/j.issn.1000-1298.2010.03.038
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
11. Accession number: 20101912918698
Title: Sugar content and the valid acidity test of the citrus based on the fractal dimensions of hue
Authors: Cao, Leping1 ; Wen, Zhiyuan2 ; Shen, Luming2
Author affiliation: 1 Educational Affairs Department, Hunan Biological and Electromechanical Polytechnic, Changsha 410127, China
2 College of Science, Hunan Agricultural University, Changsha 410128, China
Corresponding author: Wen, Z. (wenzhiyuan6629@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 143-148
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: Non-destructive detection methods of sugar content and valid acidity of Gongchuan Wenzhou citrus fruits were investigated based on computer vision. Factors which influenced the accuracy of detection were studied. Citrus fruit images from computer vision system were cut, the background was removed and conversion from RGB to HSI space was made. These images were segmented according to hue value ranges which are 0°-20°, 20°-40°, 40°-60°, 60°-80°, 80°-100° and 100°-120° hue. Fractal dimensions of each segment were calculated as inputs of BP neural network which modeled sugar content and valid acidity of citrus fruits. Results of 167 test samples showed the correctness for accuracy ±1.5°Brix of sugar content is 66.6175%, for valid acidity, the correctness for accuracy ±0.5 is 73.9275%. From these results it concluded that sugar content and valid acidity of Gongchuan Wenzhou citrus fruits has significant correlation with fractal dimension of hue value of fruit pericarp. Computer vision can be utilized to non-destructively detect these two parameters.
Number of references: 16
Main heading: Fractal dimension
Controlled terms: Computer crime - Computer vision - Initiators (chemical) - Neural networks - Nondestructive examination - Sugar (sucrose)
Uncontrolled terms: BP neural networks - Citrus fruit - Computer vision system - HSI space - Hue - Hue values - Machine vision - Non-destructive test - Nondestructive detection - Sugar content - Test samples - Two parameter
Classification code: 921 Mathematics - 902.3 Legal Aspects - 822.3 Food Products - 803 Chemical Agents and Basic Industrial Chemicals - 741.2 Vision - 731.6 Robot Applications - 723.5 Computer Applications - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 461.1 Biomedical Engineering - 423.2 Test Methods - 422.2 Test Methods - 421 Strength of Building Materials; Mechanical Properties
DOI: 10.3969/j.issn.1000-1298.2010.03.030
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
12. Accession number: 20101912918677
Title: Pressure-sinkage characteristic model of remolded soil
Authors: Yao, Yan1 ; Ding, Qishuo1 ; Zhou, Jun1
Author affiliation: 1 School of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Ding, Q. (qsding@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 40-45
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 plate sinkage test was conducted on remolded soft soil with small-sized plates to determine the effects of plate size, soil moisture content, soil bulk density and the diameter of sampling cores on the soil bearing capacity. Curve fitting on the resultant data revealed a 2nd order polynomial model of remolded soil bearing capacity. Further analysis on the fitted equation revealed a trend of logarithmic variation of each coefficient of the model with moisture content, a linear trend with soil bulk density, a logarithmic trend with the coupling of density and moisture content. The change of core diameter led to a shift of sign of the second order coefficient. A trial test on the field soil also showed a 2nd order trend of the bearing curve.
Number of references: 24
Main heading: Geologic models
Controlled terms: Bearing capacity - Bearings (structural) - Curve fitting - Moisture determination - Soil moisture - Welds
Uncontrolled terms: Characteristic model - Core diameters - Field soil - Moisture contents - Order polynomials - Plate size - Remolded soils - Second orders - Sinkage tests - Soft soils - Soil bearing capacity - Soil bulk density - Soil moisture content - Trial tests
Classification code: 922.2 Mathematical Statistics - 921.6 Numerical Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 538.2 Welding - 944.2 Moisture Measurements - 483.1 Soils and Soil Mechanics - 421 Strength of Building Materials; Mechanical Properties - 408.2 Structural Members and Shapes - 401.1 Bridges - 481.1 Geology
DOI: 10.3969/j.issn.1000-1298.2010.03.009
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
13. Accession number: 20101912918686
Title: Numerical simulation of solid-liquid two-phase turbulent flow in impeller channel and pump characteristics analysis
Authors: Liu, Jianrui1 ; Xu, Yonggang1 ; Wang, Dongmei1 ; Su, Qiqin1
Author affiliation: 1 Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Liu, J. (ljrwjj@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 86-90
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to study solid-liquid 3-D two-phase turbulent flow in a pump, the SIMPLEC algorithm was used with the casing to calculate the coupling question of a centrifugal impeller based on NS equations and the standard two equations kΕ turbulent model. From the computed information, the distribution of solid particles of different particle sizes and different volume fractions, at off-design conditions and different specific gravities were obtained, and the characteristic of pump was also calculated. The results indicated that specific gravity and particle diameter, which are the nature of particles, had more influence on the distribution of solid particles. Particles with large specific gravity value and diameter were easy to trend to working face by the effect of inertia force. The volume fraction also had an effect in particle distribution; because of relative flow angle changing in off-design conditions, particles had different distribution and movement laws. Increasing specific gravity, particle size and solid-phase volume would cause the reduction of head.
Number of references: 11
Main heading: Flow simulation
Controlled terms: Centrifugal pumps - Centrifugation - Density (specific gravity) - Hydraulic machinery - Liquids - Mathematical models - Pumping plants - Pumps - Three dimensional - Three dimensional computer graphics - Titration - Turbulent flow
Uncontrolled terms: Centrifugal impeller - Centrifugal pump impellers - Different distributions - Impeller channels - Inertia force - N-S equations - Numerical simulation - Off design condition - Particle diameters - Particle distributions - Pump characteristics - Relative flow - SIMPLEC algorithm - Solid particles - Solid-liquid - Solid-phase - Specific gravity - Turbulent models - Two equation - Working face
Classification code: 921 Mathematics - 902.1 Engineering Graphics - 802.3 Chemical Operations - 801 Chemistry - 723.5 Computer Applications - 931.2 Physical Properties of Gases, Liquids and Solids - 723.2 Data Processing and Image Processing - 631.1 Fluid Flow, General - 618.2 Pumps - 446 Waterworks - 402.1 Industrial and Agricultural Buildings - 632.2 Hydraulic Equipment and Machinery
DOI: 10.3969/j.issn.1000-1298.2010.03.018
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
14. Accession number: 20101912918707
Title: Multi-objective particle swarm optimization algorithm based on dynamic crowding distance and its application
Authors: Liu, Liqin1, 2 ; Zhang, Xueliang2 ; Xie, Liming1 ; Li, Minglei2 ; Wen, Shuhua2 ; Lu, Qingbo2
Author affiliation: 1 College of Mechanical Electronic Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2 College of Mechanical Electronic Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
Corresponding author: Zhang, X. (zhang_xue_l@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 189-194
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 multi-objective particle swarm optimization algorithm based on dynamic crowding distance (DCD-MOPSO) was proposed. Applying the improved quick sorting to reduce the time for computation, both the dynamic inertia weight and acceleration coefficients were used in the algorithm to explore the search space more efficiently. A new diversity strategy called dynamic crowding distance was used to ensure sufficient diversity amongst the solutions of the non-dominated fronts. Some benchmark functions and the optimization of four-bar plane truss were tested to compare with the performance of DCD-MOPSO and NSGAII. The results show that DCD-MOPSO has better convergence with even distributing of Pareto set.
Number of references: 15
Main heading: Multiobjective optimization
Controlled terms: Algorithms - Computational efficiency - Pareto principle - Particle swarm optimization (PSO) - Screening
Uncontrolled terms: Crowding distance - Improved quick sorting - Pareto set - Particle swarm algorithm
Classification code: 921 Mathematics - 912 Industrial Engineering and Management - 911 Cost and Value Engineering; Industrial Economics - 811.1.1 Papermaking Processes - 921.5 Optimization Techniques - 802.3 Chemical Operations - 723 Computer Software, Data Handling and Applications - 533.1 Ore Treatment - 524 Solid Fuels - 723.1 Computer Programming
DOI: 10.3969/j.issn.1000-1298.2010.03.039
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
15. Accession number: 20101912918708
Title: Design and analysis of the two-DOF fully compliant micro-mechanisms of five-link
Authors: Qiu, Lifang1 ; Liu, Qingling1, 2 ; Weng, Haishan1 ; Wu, Guochang1
Author affiliation: 1 School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
2 School of Mathematic and Information Science, Langfang Normal College, Langfang 065000, China
Corresponding author: Qiu, L. (qlf@ustb.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 195-199
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 fully compliant five-link mechanism of two-DOF was analyzed with both pseudo-rigid-body and imitate-compliant-body models. The pseudo-rigid-body and the imitate-compliant-body model of the fully compliant five-link mechanism were also established and the equation of relationship for load and displacement was presented. A symmetry fully compliant five-link micro-mechanism was designed. By using the geometric relationships of the rigid five-link mechanism and the iterative program, the results of deformation analysis in imitate-compliant-body model method for this micro-mechanism were given. At the same time, the simulation analysis in the FEM method for the micro-mechanism was also given. Compared the results with computer and FEA, the validity of the imitate-compliant-body model was proved to be effective.
Number of references: 10
Main heading: Machine design
Controlled terms: Mechanical engineering - Mechanisms
Uncontrolled terms: Body models - Deformation analysis - Design and analysis - FEM method - Fully compliant mechanism - Geometric relationships - Link mechanisms - Micro mechanisms - Pseudo-rigid body models - Pseudo-rigid-body - Simulation analysis
Classification code: 601 Mechanical Design - 601.3 Mechanisms - 608 Mechanical Engineering, General
DOI:10.3969/j.issn.1000-1298.2010.03.040
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
16. Accession number: 20101912918712
Title: Thermohydrodynamic analysis on novel journal bearing considering cavitating effects
Authors: Yang, Ying1 ; Lu, Changhou1
Author affiliation: 1 School of Mechanical Engineering, Shandong University, Ji'nan 250061, China
Corresponding author: Yang, Y. (ying0729@gmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 215-218 226
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 two-phase flow cavitation model, a numerical model of the thermohydrodynamic lubrication of spiral-oil wedge hybrid journal bearing was built up. By using finite differential method, the generalized Reynolds equation, simplified energy equation of oil film and heat conduction equation of the bush were solved. The pressure distribution of oil film and the influences of supply temperature and supply pressure on bush inner surface temperature were carried out. The results indicated that rupture area of oil film initially increased, then decreased. The rupture location in circumferential direction moved a distance which related to spiral angle. Supply temperature had a great effect on the bush inner surface temperature distribution, but contrarily, supply pressure had a little effect.
Number of references: 11
Main heading: Pressure effects
Controlled terms: Atmospheric temperature - Cavitation - Journal bearings - Lubricating oils - Lubrication - Reynolds equation - Surface properties - Two phase flow
Uncontrolled terms: Cavitation model - Circumferential direction - Energy equation - Finite differential methods - Heat conduction equations - Hybrid journal bearing - Inner surfaces - Numerical models - Oil films - Rupture areas - Rupture location - Spiral angle - Supply pressure - Thermo-hydrodynamic analysis - Thermo-hydrodynamic lubrication - Thermohydrodynamics - Two phase flow model
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 921.2 Calculus - 631.1.1 Liquid Dynamics - 951 Materials Science - 631.1 Fluid Flow, General - 607.1 Lubricants - 601.2 Machine Components - 443.1 Atmospheric Properties - 607.2 Lubrication
DOI: 10.3969/j.issn.1000-1298.2010.03.044
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
17. Accession number: 20101912918671
Title: Modeling and simulation on stochastic road surface irregularity based on Matlab/Simulink
Authors: Chen, Jieping1, 2 ; Chen, Wuwei1 ; Zhu, Hui1 ; Zhu, Maofei1
Author affiliation: 1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
2 College of Engineering, Anhui Science and Technology University, Fengyang 233100, China
Corresponding author: Chen, W. (cww@mail.hf.ah.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 11-15
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In the time domain analysis of vehicle ride comfort, the veracity of the input excitation signals is directly related to the simulation result. The random road model was constructed by Matlab/Simulink based on the study of the relation of stochastic road space and time frequency power spectral density (PSD) and PSD and root-mean-square (RMS). The stochastic excitation signals were produced, and the vertical displacement of the B and C level uneven road was built by simulation with different vehicle velocities. By PSD and RMS analysis of vertical displacement of simulation result and national standards, the correctness of model was confirmed. That can offer reliable excitation signals for control research of vehicle. It proves that the idea and methods of modeling is unique and practical.
Number of references: 16
Main heading: Time domain analysis
Controlled terms: Computer simulation - Instrument scales - Packet networks - Power spectral density - Roads and streets - Stochastic models - Stochastic systems
Uncontrolled terms: Excitation signals - MATLAB /simulink - Modeling and simulation - National standard - Random excitations - RMS analysis - Road models - Road surfaces - Root mean squares - Roughness of road surface - Simulation result - Space and time - Stochastic excitations - Uneven roads - Vehicle ride - Vehicle velocity - Vertical displacements
Classification code: 921 Mathematics - 922.1 Probability Theory - 941 Acoustical and Optical Measuring Instruments - 751.1 Acoustic Waves - 942 Electric and Electronic Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 961 Systems Science - 943 Mechanical and Miscellaneous Measuring Instruments - 731.1 Control Systems - 703.1.1 Electric Network Analysis - 711 Electromagnetic Waves - 716 Telecommunication; Radar, Radio and Television - 406.2 Roads and Streets - 717 Optical Communication - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.5 Computer Applications - 718 Telephone Systems and Related Technologies; Line Communications
DOI: 10.3969/j.issn.1000-1298.2010.03.003
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
18. Accession number: 20101912918694
Title: Analysis and experiment of heat transfer in Helmholtz pulse combustion dryer
Authors: Lu, Qianqian1 ; Yang, Deyong1 ; Lang, Zhihua1 ; Liu, Xiangdong1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Yang, D. (ydy@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 123-127
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 further understand the heat transfer characteristics of pulse combustion drying process, a Helmholtz type pulsing burner was used to carry out heat-transfer experiments. Through a convective heat-transfer experiment between pulsing air and brass ball by the method of lumped heat capacity, the convective heat-transfer coefficient in different frequencies pulse air was determined, and the impact of pulse frequency on the convective heat-transfer coefficient between material and airflow was investigated, the criterion correlation between Nu and pulse frequency was also established. By using the established correlation, the drying process of the refractory clay particles in the pulse combustion was forecasted. Compared with the experimental value, the results showed that the predicted values and the experimental results matched well.
Number of references: 11
Main heading: Experiments
Controlled terms: Combustion - Heat convection - Heat exchangers - Nusselt number - Solar equipment
Uncontrolled terms: Convective heat transfer - Convective heat-transfer coefficient - Different frequency - Drying process - Experimental values - Heat capacities - Heat transfer characteristics - Helmholtz - Pulse combustion - Pulse frequencies - Pulsing air - Refractory clays
Classification code: 521.1 Fuel Combustion - 615.2 Solar Power - 616.1 Heat Exchange Equipment and Components - 641.2 Heat Transfer - 657.1 Solar Energy and Phenomena - 901.3 Engineering Research
DOI: 10.3969/j.issn.1000-1298.2010.03.026
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
19. Accession number: 20101912918672
Title: Speed synchronization control of hydrostatic transmission based on fuzzy self-tuning PID
Authors: Li, Heyan1 ; Chen, Baorui2 ; Ma, Biao1 ; Zhang, Hailing1
Author affiliation: 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2 SAIC Motor Technical Center, Shanghai 201804, China
Corresponding author: Li, H. (lovheyan@bit.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 16-19 45
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 fuzzy control and PID control, a new type of fuzzy self-tuning PID controller was designed. The controller worked for synchronization control of hydrostatic transmission with dual pump and dual motor, which was used to drive a high speed light duty tracked vehicle. The results of simulation and tests showed that during straight running, the controller could restrain the motor speed error effectively when suffering different load disturbances, meanwhile it could get good synchronization results and the synchronization control was quite robust. The new control system is better than common PID control and is suitable for high speed tracked vehicle hydrostatic transmission.
Number of references: 9
Main heading: Controllers
Controlled terms: Fuzzy control - Hydraulics - Hydrodynamics - Hydrostatic pressure - Light transmission - Proportional control systems - Speed - Synchronization - Three term control systems - Tracked vehicles - Tuning - Two term control systems
Uncontrolled terms: Dual-motors - Hydrostatic transmission - Light-duty - Load disturbances - Motor speed errors - PID control - Self-tuning PID - Synchronization control
Classification code: 731 Automatic Control Principles and Applications - 731.1 Control Systems - 732.1 Control Equipment - 961 Systems Science - 741.1 Light/Optics - 921 Mathematics - 931.1 Mechanics - 744.1 Lasers, General - 723.4 Artificial Intelligence - 716.4 Television Systems and Equipment - 631.1.1 Liquid Dynamics - 631.2 Hydrodynamics - 632.1 Hydraulics - 663 Buses, Tractors and Trucks - 713 Electronic Circuits - 716.3 Radio Systems and Equipment
DOI: 10.3969/j.issn.1000-1298.2010.03.004
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
20. Accession number: 20101912918687
Title: Analysis on pressure fluctuation of unsteady flow in a centrifugal pump
Authors: Wang, Yang1 ; Dai, Cui1
Author affiliation: 1 Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Wang, Y. (pgwy@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 91-95
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 pressure fluctuation of interflow fields in a centrifugal pump is a major factor affecting unit operating stability. The unsteady flow feature was investigated by RNG kΕ turbulence model with sliding mesh technology. The pressure fluctuation and the corresponding frequency spectra at different monitoring points for different operating conditions were obtained. The results showed that the main factor, which created the pressure fluctuation in the pump, was the interaction between the impeller and the tongue, and the pressure pulsation spread widely inside the whole passage. The results also indicated that the blade passage frequency dominated for all operating conditions. The amplitude of the pressure fluctuations on the pressure side of the blade passage is larger than that on the suction side, and the pressure fluctuation was similar at the same measured surface for the outlet.
Number of references: 9
Main heading: Pumps
Controlled terms: Aerodynamics - Centrifugal pumps - Computer crime - Hydraulic machinery - Pumping plants - Spectroscopy - Turbulence models - Unsteady flow
Uncontrolled terms: Blade passage - Blade passage frequency - Frequency spectra - Interflow - Monitoring points - Operating condition - Operating stability - Pressure fluctuation - Pressure pulsation - Pressure side - Sliding mesh - Suction side
Classification code: 931.3 Atomic and Molecular Physics - 902.3 Legal Aspects - 801 Chemistry - 723 Computer Software, Data Handling and Applications - 651.1 Aerodynamics, General - 932.2 Nuclear Physics - 632.2 Hydraulic Equipment and Machinery - 618.2 Pumps - 446 Waterworks - 443.1 Atmospheric Properties - 402.1 Industrial and Agricultural Buildings - 631.1 Fluid Flow, General
DOI: 10.3969/j.issn.1000-1298.2010.03.019
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
21. Accession number: 20101912918679
Title: Compensation effects of water stress and rewatering on the structure of rice canopy
Authors: Hao, Shurong1 ; Guo, Xiangping2 ; Zhang, Zhanyu2
Author affiliation: 1 Key Lab. of Efficient Irrigation-drainage and Agricultural Soil-water Environment in Southern China, Hohai University, Nanjing 210098, China
2 College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China
Corresponding author: Hao, S. (srhao@hhu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 52-55 61
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: Research was carried out to determine the compensation effects of water stress and rewatering on the structure of rice canopy by pot and test-pit experiments. The results showed that water stress inhibited the number of leaves and leaf area, and effectively induced the rice canopy structure that was beneficial to the compensation effect of post-drought watering. By post-drought watering, the panicle nodes were elongated, senescence speed of leaves was restrained, and rice adaptabilities to next drought were increased. The compensation effects of rewatering are best after heavy drought at late stage of seedlings and light drought at early stage of jointing. Continuous drought by two rice growth stages and heavy drought at jointing stage should be avoided.
Number of references: 8
Main heading: Plants (botany)
Controlled terms: Drought
Uncontrolled terms: Canopy structure - Compensation effects - Growth stages - Late stage - Leaf area - Rewatering - Rice canopy - Water stress
Classification code: 443.3 Precipitation - 444 Water Resources - 461.9 Biology
DOI: 10.3969/j.issn.1000-1298.2010.03.011
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
22. Accession number: 20101912918676
Title: Soil surface roughness indices, interpretation and application
Authors: Zhang, Huijuan1 ; Sun, Yurui1
Author affiliation: 1 Research Center for Precision Farming, China Agricultural University, Beijing 100083, China
Corresponding author: Sun, Y. (pal@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 33-39
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The surface elevation of a tilled field shows both oriented and random morphologies. Based on stochastic process theory, the temporal variability of the tilled surface roughness over time fulfills the ergodic property. Characterizing the temporal/spatial variability of the tilled surface by using different indices is beneficial in assessing the tilled quality, studying soil water movement, and for optimal management of agricultural field. Therefore, interpretation of various roughness indices has become a focus in precision agriculture worldwide. In this general review, a broad discussion of soil surface roughness that contains multi-scale models, multi-factor analysis on temporal/spatial variability, and direct or potential utilities in agricultural activity was provided.
Number of references: 56
Main heading: Geologic models
Controlled terms: Agricultural machinery - Agriculture - Metal analysis - Random processes - Soil moisture - Surface properties - Surface roughness - Underwater soils
Uncontrolled terms: Agricultural activities - Agricultural fields - Ergodic property - Multi-factor - Multiscale models - Optimal management - Potential utility - Precision Agriculture - Roughness index - Soil surfaces - Soil water movement - Stochastic process - Surface elevations - Temporal variability
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 922.1 Probability Theory - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 951 Materials Science - 801 Chemistry - 483.1 Soils and Soil Mechanics - 481.1 Geology - 471.1 Oceanography, General - 531 Metallurgy and Metallography
DOI: 10.3969/j.issn.1000-1298.2010.03.008
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
23. Accession number: 20101912918669
Title: Optimization of start-up strategies of dual mode CVT powertrains
Authors: Luo, Yong1 ; Sun, Dongye1 ; Qin, Datong1 ; Hu, Jianjun1 ; Cao, Youqiang
Author affiliation: 1 State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
Corresponding author: Luo, Y. (luoyong@cqu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 1-5
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Conventionally, the start-up control strategy of dual mode CVT has focused on obtaining maximum output power of the combination of engine and torque converter; however, this strategy did not pay attention to the efficiency of the metal V-belt unit, which also influenced the start-up characteristics of the system. A start-up control strategy considering both TC and metal V-belt efficiency was proposed. An optimal algorithm was developed to calculate the target CVT ratio in order to obtain maximum driving power with consideration of both TC and metal V-belt efficiency. Simulation and experimental results indicated that, when lock-up speed was 30km/h and start-up throttle opening was 20%, working time of the TC during the start-up process was reduced by about 0.8s after the optimization.
Number of references: 8
Main heading: Torque converters
Controlled terms: Optimization - Thermal conductivity - Variable speed transmissions - Vehicle transmissions
Uncontrolled terms: Continuously variable transmission - Control strategies - Control torque - Driving power - Dual modes - Maximum output power - Optimal algorithm - Start-up control - Start-up process - Start-up strategy - Start-ups - Throttle opening - Working time
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 662.4 Automobile and Smaller Vehicle Components - 641.2 Heat Transfer - 641.1 Thermodynamics - 602.2 Mechanical Transmissions - 602.1 Mechanical Drives
DOI: 10.3969/j.issn.1000-1298.2010.03.001
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
24. Accession number: 20101912918705
Title: Control method of virtual plant morphology using parameter curve
Authors: Jiang, Lin1
Author affiliation: 1 Software College, East China Institute of Technology, Nanchang 330013, China
Corresponding author: Jiang, L. (jlcdf@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 177-181
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 simple control method for virtual plant morphology was presented. The topology structure of plant was obtained from L-system. In L-system, the value of plant parameters was controlled by regular curve, cubic spline curve and B-spline curve. The plant morphology was varied by the modified parameters curve shape, the hypotaxis was determined by using correlation model with both plant parameters and curves. The results showed that the length parameters, angle, and color could be represented by B-spline curve, cubic spline curve and regular curve respectively, and the plant morphology was similar with curve shapes. The method is helpful in future plant modeling.
Number of references: 9
Main heading: Morphology
Controlled terms: Curve fitting - Splines
Uncontrolled terms: B spline curve - Control methods - Correlation models - Cubic spline curve - Curve shape - L-systems - Plant modeling - Plant morphology - Plant parameters - Regular curve - Simple control method - Topology structure - Virtual plants
Classification code: 601.2 Machine Components - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
DOI:10.3969/j.issn.1000-1298.2010.03.037
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
25. Accession number: 20101912918670
Title: Dynamic performance simulation and optimization of speed ratio control valve in continuously variable transmission
Authors: Liu, Jin'gang1 ; Tan, Yuanqiang1 ; Xu, Huiyu2 ; Chen, Jianwen2
Author affiliation: 1 College of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China
2 Technology Center, Jianglu Electromechanical Science and Technology Co., Ltd, Xiangtan 411105, China
Corresponding author: Liu, J. (wellbuild@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 6-10
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A method for dynamic performance optimization of continuously variable transmission speed ratio control valve based on improved particle swarm optimization algorithm is presented. First at all, a dynamic model was set up by means of mechanism analysis to predict the valve dynamic performance. Then, an objective function for optimization was established considering dynamic performance indices of speed ratio control valve such as response time, overshoot and saving energy based on its operating requirements. Finally, the optimization problem was solved by using an improved particle swarm optimization algorithm with necessary constraints. The properties of the optimized valve were compared with the prototype workpiece, and the results indicated that the dynamic performance indices of the optimized valve were much better than those of the prototype workpiece.
Number of references: 8
Main heading: Particle swarm optimization (PSO)
Controlled terms: Dynamic response - Mechanisms - Reactive power - Safety valves - Speed
Uncontrolled terms: Continuously variable transmission - Dynamic performance - Improved particle swarm optimization algorithms - Mechanism analysis - Objective functions - Operating requirements - Optimization problems - Response time - Saving energy - Speed ratio control - Valve dynamics - Work pieces
Classification code: 931.1 Mechanics - 921.5 Optimization Techniques - 914.1 Accidents and Accident Prevention - 723 Computer Software, Data Handling and Applications - 706 Electric Transmission and Distribution - 703.1 Electric Networks - 619.1.1 Pipe Accessories - 601.3 Mechanisms - 408.1 Structural Design, General
DOI: 10.3969/j.issn.1000-1298.2010.03.002
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
26. Accession number: 20101912918704
Title: Research on visualization model for translucent flower
Authors: Lu, Ling1 ; Yang, Xuedong2 ; Wang, Lei1
Author affiliation: 1 School of Information and Electric Engineering, East China Institute of Technology, Fuzhou 344000, China
2 Department of Computer Science, University of Regina, Regina S4S 0A2, Canada
Corresponding author: Lu, L. (luling@ecit.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 173-176
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A simple modeling method for translucent flower was presented. The geometric model for flower can be built through change basic shape. According to the distribution feature of floral envelope, the distance between petals to calculate translucent shadow distribution was used. 3-D space question was changed to 2-D space question thought many times mapping and many buffer zone. With this method the modeling can be quickly realized and the experiment results showed the simulation effect is better.
Number of references: 7
Main heading: Visualization
Uncontrolled terms: 2-D space - 3-D space - Basic shapes - Buffer zones - Flower - Geometric models - Simple modeling - Visualization models
Classification code: 902.1 Engineering Graphics
DOI: 10.3969/j.issn.1000-1298.2010.03.036
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
27. Accession number: 20101912918693
Title: Production of sweet potato flour with the method of drum dryer
Authors: Duan, Xin1 ; Xue, Wentong1 ; Zhang, Zejun1 ; Zhang, Hui1 ; Yu, Zhanglong1
Author affiliation: 1 College of Food Science and Nutritional 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: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 117-122
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 technology of processing sweet potato flour using a drum dryer was studied. Effect of the material temperature, material thickness, roller rotating speed, and roller temperature on the technology in which flour color and the cumulate density were taken as response values was analyzed with response surface methodology. For design of process requirement, optimum conditions were as follows: material temperature was 42°C, material thickness was 13.6%, roller rotating speed was 3.0r/min, and roller temperature was 143°C. Under such conditions, the cumulate density was 0.51g/mL, which coincided with actual values within the 95% confidence interval. Predictive models are feasible in practice.
Number of references: 5
Main heading: Rollers (machine components)
Controlled terms: Dryers (equipment) - Optimization - Process control - Rotating machinery - Rotation - Surface properties
Uncontrolled terms: Confidence interval - Material temperature - Material thickness - Optimum conditions - Predictive models - Process optimization - Process requirements - Response Surface Methodology - Rotating speed - Sweet potato flour
Classification code: 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 931.1 Mechanics - 921.5 Optimization Techniques - 802.1 Chemical Plants and Equipment - 731 Automatic Control Principles and Applications - 642.2 Industrial Furnaces and Components - 601.2 Machine Components - 601.1 Mechanical Devices
DOI: 10.3969/j.issn.1000-1298.2010.03.025
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
28. Accession number: 20101912918685
Title: Experiment and mechanism of centrifugal pumps rotation speed measurement based on rotor-stator interaction
Authors: Pan, Zhongyong1 ; Ni, Yongyan2 ; Yuan, Shouqi1 ; Li, Hong1
Author affiliation: 1 Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
2 School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Corresponding author: Pan, Z. (pzy@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 81-85
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: As relative motion is existing between the impeller and volute, periodical pressure fluctuations is produced by the flow interaction of the impeller and volute. Numerical simulations showed that obvious high speed regions were formed along the direction of the absolute velocity in the casing at the down-stream of the trailing edges. The pressure fluctuations in casing present periodical features, have five peaks and five valleys according to the number of vanes. Frequency spectrum showed that the dominate frequency of the pressure fluctuation was the blade passing frequency. Pressure acquisition in experimental test was executed by a high-frequency pressure sensor installed in the pump outlet flange. FFT technology was used to analyze the measured signals, and it also showed that the dominate frequency was the blade passing frequency. A new technology to measure the pump rotating speed was developed according to the feature of the rotor-stator interaction. The original contents were those pressure signals at the pump outlet. The dominate frequency of the contents was calculated by the technology of FFT, and then the rotating speed was calculated.
Number of references: 10
Main heading: Pumps
Controlled terms: Axial flow - Centrifugal pumps - Computer simulation - Experiments - Fast Fourier transforms - Hydraulic machinery - Pumping plants - Rotating machinery - Rotation - Spectroscopy - Speed - Stators
Uncontrolled terms: Blade passing frequency - Down-stream - Experimental test - Frequency spectra - High frequency HF - Measured signals - New technologies - Numerical simulation - Pressure fluctuation - Pressure signal - Pump rotating - Relative motion - Rotating speed - Rotation speed - Rotor-stator interaction - Rotor-stator interactions - Trailing edges
Classification code: 932.2 Nuclear Physics - 723.5 Computer Applications - 801 Chemistry - 901.3 Engineering Research - 921.3 Mathematical Transformations - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 705.1 Electric Machinery, General - 631.1 Fluid Flow, General - 618.2 Pumps - 601.1 Mechanical Devices - 446 Waterworks - 402.1 Industrial and Agricultural Buildings - 632.2 Hydraulic Equipment and Machinery
DOI: 10.3969/j.issn.1000-1298.2010.03.017
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
29. Accession number: 20101912918688
Title: Research on suction performance of high-speed centrifugal pump with inducer
Authors: Cui, Baoling1 ; Wan, Zhong1 ; Zhu, Zuchao1, 2 ; Zheng, Qiluan3
Author affiliation: 1 Laboratory of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou 310018, China
2 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
3 Zhejiang Tiande Pumps Co., Ltd, Cangnan 325800, China
Corresponding author: Cui, B. (blcui@zstu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 96-99
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: Experimental research on suction performance was carried out on high-speed centrifugal pump with inducer by using closed test. The effect on the characteristic and suction performance of the centrifugal pump was analyzed with no inducer, one and two-phase inducers. It was found that one or two-phase inducers had little influence on the characteristic performance of a centrifugal pump. Compared with no inducer, the head and efficiency decreased slightly by using one inducer, and they slightly increased by using a two-phase inducer. But suction performance of centrifugal pump was improved by using a two-phase inducer.
Number of references: 9
Main heading: Pumps
Controlled terms: Centrifugal pumps - Experiments - Hydraulic machinery - Pumping plants - Speed
Uncontrolled terms: Experimental research - High-speed - Inducer - Suction performance
Classification code: 402.1 Industrial and Agricultural Buildings - 446 Waterworks - 618.2 Pumps - 632.2 Hydraulic Equipment and Machinery - 901.3 Engineering Research - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.03.020
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
30. Accession number: 20101912918709
Title: Tooth surface correction for spiral bevel gears
Authors: Su, Jinzhan1 ; Fang, Zongde1 ; Gu, Jiangong1
Author affiliation: 1 School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Corresponding author: Su, J. (sujinzhan@mail.nwpu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 200-203 138
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 NC machining, the tooth surface errors correction of spiral bevel gears was investigated. A new method for the machining settings transformation from cradle-type hypoid generator to Free-Form one was proposed, and the tooth errors mathematical model based on NC machining was established. The minimum of square sum of tooth surface errors was the objective function to optimize the cradle-type hypoid generator machine settings and transform those parameters into NC form so as to realize the NC machining correction of spiral bevel gears. Finally a numerical example was presented. The results showed that it could achieve precise correction after altering relative weight coefficient and optimizing for several times.
Number of references: 8
Main heading: Bevel gears
Controlled terms: Dentistry - Error correction - Machining - Mathematical models - Mathematical transformations - Optimization
Uncontrolled terms: Machine settings - NC-machining - Numerical example - Objective functions - Relative weights - Spiral bevel gears - Square sum - Tooth errors - Tooth surface
Classification code: 921.5 Optimization Techniques - 921.3 Mathematical Transformations - 921 Mathematics - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 604.2 Machining Operations - 601.2 Machine Components - 462.3 Dental Equipment and Supplies - 461.6 Medicine and Pharmacology - 461.1 Biomedical Engineering
DOI: 10.3969/j.issn.1000-1298.2010.03.041
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
31. Accession number: 20101912918682
Title: Numerical simulating approaches and experiment on micro-scales flow field
Authors: Jin, Wen1, 2 ; Zhang, Hongyan1
Author affiliation: 1 School of Environment and Municipal Engineering, Xi'an Architectural and Technological University, Xi'an 710055, China
2 Department of Power Engineering, Xi'an Aeronautical College, Xi'an 710077, China
Corresponding author: Jin, W. (jinwen@xihangzh.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
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: On the basis of micro-scales flow field detected by Micro-PIV experiment, Fluent numerical analytic computing software was utilized to design the optimum micro-scales flow simulating plan. In accordance with features of micro-scales, the micro-scales effect manipulating approaches setting wall roughness element and the porous medium simulating wall roughness element was adopted during the design. In the experiment, using realizable kΕ model and standard kω model provided by Fluent software, the relative numerical simulations on the rectangle cross section micro-scales water flowing with side length of 600μm in the case of Re=100 and Re=300 was done. With the comparison of velocity field computed from various numerical analyses and the fitting degree of Micro-PIV experimental outcome, the optimum plan that designing case via the porous medium simulating wall roughness element under the solution of realizable kΕ was acquired.
Number of references: 10
Main heading: Mathematical models
Controlled terms: Computational fluid dynamics - Computer simulation - Computer software - Electroosmosis - Experiments - Flow fields - Numerical analysis - Porous materials - Problem solving - Underground structures - Velocity measurement
Uncontrolled terms: Computing software - Cross section - Fitting degree - FLUENT software - Micro PIV - Micro-scales - Numerical simulating - Numerical simulation - Porous medium - Side length - Velocity field - Wall roughness
Classification code: 802.3 Chemical Operations - 901.3 Engineering Research - 921 Mathematics - 921.6 Numerical Methods - 931.1 Mechanics - 943.3 Special Purpose Instruments - 951 Materials Science - 723.5 Computer Applications - 408.1 Structural Design, General - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 701.1 Electricity: Basic Concepts and Phenomena - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence
DOI: 10.3969/j.issn.1000-1298.2010.03.014
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
32. Accession number: 20101912918692
Title: Design of pulsed vacuum drum dryer
Authors: Gao, Zhenjiang1 ; Wu, Dingwei1 ; Zhang, Shuge2 ; Wang, Jicheng1 ; Zhang, Zejun1 ; Lou, Zheng1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Department of Extension, Agriculture Machinery Technology Extension of Ministry of Agriculture, Beijing 100079, China
Corresponding author: Gao, Z. (zjgao@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 113-116 127
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 pulsed vacuum drum dryer was designed. This machine consisted of a drying drum, heat system, rotary joint, control system, vacuum system and drive system. The pressure in the drying drum can be changed between vacuum and atmospheric pressure by opening or closing an electromagnetic valve. The drying drum can increase the load of materials, and at the same time can make heating more uniform by rolling. So, the efficiency of the machine can be increased. The experimental results of centennial seedless drying demonstrated that the machine could produce raisins with moisture content of 16.4% (w.b.) and acid-sugar ratio of 33.2 in 12h. when the pressure was 7kPa, vacuum drying was 20min and atmospheric drying was 4min for one cycle, drying temperature was 60°C.
Number of references: 13
Main heading: Curing
Controlled terms: Atmospheric pressure - Design - Dryers (equipment) - Drying - Sugar (sucrose) - Vacuum - Vacuum technology
Uncontrolled terms: Drive systems - Drying temperature - Electromagnetic valves - Heat systems - Moisture contents - Pulsed vacuum - Rotary joint - Vacuum drying - Vacuum system
Classification code: 822.3 Food Products - 818.3 Rubber and Elastomer Processing - 815.1 Polymeric Materials - 802.3 Chemical Operations - 802.2 Chemical Reactions - 902.1 Engineering Graphics - 802.1 Chemical Plants and Equipment - 642.1 Process Heating - 633 Vacuum Technology - 443.1 Atmospheric Properties - 408 Structural Design - 642.2 Industrial Furnaces and Components
DOI: 10.3969/j.issn.1000-1298.2010.03.024
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
33. Accession number: 20101912918681
Title: Computational theory of cavitating flows with consideration of influence of water quality
Authors: Wang, Lei1 ; Chang, Jinshi1
Author affiliation: 1 College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Wang, L. (cauwanglei@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 62-66 76
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 conventional computational theory of cavitating flows, it is assumed that the pressure within the cavity or on the cavity surface remains constant and is equal to the vapor pressure of the clean water at 20°C and at zero altitude. The cavitation is confused with the vaporization, and the effect of water quality on cavitation pressure characteristic is not taken into account. The effect of water quality on cavitation pressure characteristic was analyzed and the computational theory and method of cavitating flows that considered the influence of water quality was proposed. The theory is suitable for both the potential theory and two phase method for cavitating flow simulation. Finally the validation results for cavitating flows in a hydraulic turbine indicated the significant influences of water quality on the cavitating flow performance.
Number of references: 14
Main heading: Cavitation
Controlled terms: Computation theory - Flow simulation - Hydraulic machinery - Hydraulic motors - Hydraulic turbines - Hydraulics - Knowledge based systems - Pressure effects - Water pollution - Water quality - Water vapor
Uncontrolled terms: Cavitating flow - Cavitation pressure - Cavity surfaces - Clean waters - Computational theories - Effect of water - Influence of water - Potential theory - Two phase method - Validation results
Classification code: 632.2 Hydraulic Equipment and Machinery - 641 Heat and Mass Transfer; Thermodynamics - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 931.1 Mechanics - 723.4.1 Expert Systems - 801.4 Physical Chemistry - 921 Mathematics - 723.5 Computer Applications - 632.1 Hydraulics - 631.1.1 Liquid Dynamics - 443.1 Atmospheric Properties - 445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 617.1 Hydraulic Turbines - 631.1 Fluid Flow, General
DOI: 10.3969/j.issn.1000-1298.2010.03.013
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
34. Accession number: 20101912918711
Title: Feature extraction methods of vibration signal in automobile main reducer based on morphological un-decimated wavelet
Authors: Lin, Yong1 ; Yang, Youdong1 ; Liu, Jian1
Author affiliation: 1 Zhijiang College, Zhejiang University of Technology, Hangzhou 310014, China
Corresponding author: Lin, Y. (linyong@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 209-214
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to explore methods that can process effectively nonlinear signals, the nonlinear wavelet, morphological wavelet (MW) was introduced into the field of vibration signal processing. Because of the decline of decomposition signal layer by layer, one kind of morphological un-decimated wavelet construction method based on the cascade of morphological opening and morphological closing was proposed. According to the general structure of morphological un-decimated wavelet (MUDW), the filtered signal, filtering by the cascade of morphological opening and morphological closing, constructed the approximate signal, and detail signal was equal to the original signal subtract the approximate signal. Obviously through the process of decomposing, the approximate signal or detailed signal of current layer and low level layer had the same data length to avoid information leaking and provide enough information for signal processing. The method was used in the feature extraction of vibration signal in automobile main reducer. Results showed that the mentioned MUDW had better filtering effect than the existing MUDW and linear wavelet (sym8 wavelet), and it also had better demodulation effect than Hilbert envelope analysis. The mentioned MUDW can extract the feature from nonlinear vibration signal effectively and have good application value.
Number of references: 8
Main heading: Signal processing
Controlled terms: Decomposition - Failure analysis - Feature extraction - Microphones - Nonlinear analysis - Wavelet decomposition
Uncontrolled terms: Current layers - Data length - Fault diagnosis - Feature extraction methods - Filtered signals - Filtering effects - Hilbert envelope - Layer by layer - Low level - Main reducer - Morphological closing - Morphological opening - Morphological wavelet - Non-linear vibrations - Nonlinear signals - Nonlinear wavelets - Original signal - Vibration signal - Wavelet construction
Classification code: 921 Mathematics - 802.2 Chemical Reactions - 752.1 Acoustic Devices - 751.1 Acoustic Waves - 741.1 Light/Optics - 921.3 Mathematical Transformations - 731.1 Control Systems - 716.1 Information Theory and Signal Processing - 716 Telecommunication; Radar, Radio and Television - 703.1.1 Electric Network Analysis - 421 Strength of Building Materials; Mechanical Properties - 723.5 Computer Applications
DOI:10.3969/j.issn.1000-1298.2010.03.043
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
35. Accession number: 20101912918714
Title: Innovative deformation design of triangular mesh model
Authors: Sun, Dianzhu1 ; Tian, Zhongchao1 ; Li, Yanrui1 ; Li, Xincheng1
Author affiliation: 1 School of Mechanical Engineering, Shandong University of Technology, Zibo 255091, China
Corresponding author: Sun, D. (dianzhus@sdut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 223-226
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 design algorithm of a triangular mesh model was proposed, that included four steps: first, the reference surface of the triangular mesh model was obtained with least square method; second, the projection point of vertex on mesh was calculated and the mapping relationship of mesh vertex and projection point was built; third, the coordinates of mesh vertexes were changed according to the displacement of projection points when adjusting the control points of reference surface; and fourth, the fairing of mesh model was built with triangular Bezier surface design method, which proved that the deformation region of triangular mesh model was effectively controlled. The smoothness of mesh model and the efficiency of innovative deformation designing have been improved effectively.
Number of references: 7
Main heading: Deformation
Controlled terms: Design - Least squares approximations
Uncontrolled terms: Bezier surface - Fairing processing - Innovative deformation design - Reference surface - Triangular meshes
Classification code: 408 Structural Design - 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 902.1 Engineering Graphics - 921.6 Numerical Methods
DOI: 10.3969/j.issn.1000-1298.2010.03.046
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
36. Accession number: 20101912918684
Title: Cavitation experimental research on centrifugal pump
Authors: Su, Yongsheng1 ; Wang, Yongsheng1 ; Duan, Xiangyang1
Author affiliation: 1 College of Naval Architecture and Marine Power, Naval University of Engineering, Wuhan 430033, China
Corresponding author: Su, Y. (suyongsheng1981@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 77-80
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 series of tests were conducted in a laboratory to improve cavitation monitoring techniques. The best run condition together with the cavitation at the same rotary speed-dropping flow rate and same rotary speed-flow rate were simulated on this test-bed. Moreover, the inlet water sound and enclosure vibration signal of the pump were acquired. The results of the cavitation experimental study showed that pump's NPSH3 was increased by flow rate at 100, 110, 120m3/h; the inlet water sound and enclosure vibration signal of pump were followed uniformity by sound pressure rule; according to the distribution of experimental data points and NPSH3 distinguishable curve, as well as sound pressure curve, the range of lift declined 3% which was regarded as inceptive cavitation that used in project was near the pressure energy maximal position; pump cavitation real time monitoring was carried through sound pressure curve peak value and 3σ principle.
Number of references: 5
Main heading: Pumps
Controlled terms: Cavitation - Centrifugal pumps - Enclosures - Hydraulic machinery - Pumping plants - Ultrasonics
Uncontrolled terms: Experimental data - Experimental research - Experimental studies - Monitoring techniques - Peak values - Pump cavitation - Real time monitoring - Rotary speed - Sound pressures - Vibration signal
Classification code: 914 Safety Engineering - 753.1 Ultrasonic Waves - 632.2 Hydraulic Equipment and Machinery - 631.1.1 Liquid Dynamics - 618.2 Pumps - 446 Waterworks - 402.1 Industrial and Agricultural Buildings
DOI: 10.3969/j.issn.1000-1298.2010.03.016
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
37. Accession number: 20101912918674
Title: Characteristics of temperature field on damping buffers for viscoelastic suspensions
Authors: Jia, Zhixuan1 ; Wang, Jun1, 2 ; Sun, Dagang1, 3 ; Song, Yong3
Author affiliation: 1 Mechanical and Electronic Engineering College, Taiyuan University of Science and Technology, Taiyuan 030024, China
2 Taiyuan Changan Heavy Duty Truck Co., Ltd, Taiyuan 030031, China
3 School of Mechanical Instrumental Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author: Jia, Z. (jiazhixuan374@sohu.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 25-28
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The temperature field of damping buffers for viscoelastic suspensions mounted on crawler vehicles was analyzed under typical working conditions. The temperature correlation of the material was ignored to decouple the structure-thermal coupling field. The analytical results of structure were used as the basic conditions for thermal analysis. Because of nonlinear and large deformation under load, the temperature field was calculated by finite element method (FEM). The positions of local hot spots and temperatures under typical loads were obtained by computation. The curves of temperature against factors and its fitting equation on engineering applications were also determined. The results provide reasonable parameters for damping buffers structure optimizing.
Number of references: 11
Main heading: Automobile parts and equipment
Controlled terms: Automobile suspensions - Curve fitting - Damping - Finite element method - Suspensions (components) - Suspensions (fluids) - Thermoanalysis
Uncontrolled terms: Analytical results - Basic conditions - Crawler vehicle - Engineering applications - Fitting equations - Hot spot - Large deformations - Structure optimizing - Temperature correlation - Temperature field - Thermal analysis - Thermal coupling - Working conditions
Classification code: 931.1 Mechanics - 922.2 Mathematical Statistics - 921.6 Numerical Methods - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 804 Chemical Products Generally - 801.3 Colloid Chemistry - 801 Chemistry - 663.2 Heavy Duty Motor Vehicle Components - 662.4 Automobile and Smaller Vehicle Components - 632.1 Hydraulics - 601.2 Machine Components
DOI: 10.3969/j.issn.1000-1298.2010.03.006
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
38. Accession number: 20101912918697
Title: Experiment on the control of temperature and humidity and thermal response for pre-cooling cold storage
Authors: Tan, Jingying1 ; Wang, Qing1 ; An, Weike1
Author affiliation: 1 School of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, China
Corresponding author: Tan, J. (jingyingtan@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 139-142 194
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: Full-frequency drop in temperature and conversion drop in temperature were compared. The latter had some merits of smooth drop and small amplitude of temperature (in despite of shortage of longer time). Several modes of providing wind ventilation were studied. Flow equalization with a pore plate was better than the traditional methods such as one fan, two fans and a jacket. Heat impact on the circumstance in the cold storage was analyzed considering of the door open and some precautionary measures were introduced.
Number of references: 8
Main heading: Cold storage
Controlled terms: Cooling - Humidity control - Refrigerators
Uncontrolled terms: Frequency drops - Patterns of providing wind - Pore plates - Pre-cooling - Precautionary measures - Small amplitude - Temperature drops - Thermal response
Classification code: 402 Buildings and Towers - 641.2 Heat Transfer - 643.3 Air Conditioning - 644.3 Refrigeration Equipment and Components - 694.4 Storage - 802.3 Chemical Operations
DOI: 10.3969/j.issn.1000-1298.2010.03.029
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
39. Accession number: 20101912918689
Title: Three dimensional reconstruction on impeller of pumps based on CT
Authors: Shi, Weidong1 ; Jiang, Xiaoping1 ; Li, Wei1 ; Tan, Minggao1 ; Liu, Houlin1
Author affiliation: 1 Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, 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: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 100-103
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 the limitation of the ordinary methods of reverse engineering at present in unable showing the inner construction of pump parts, a new way on reverse engineering for impeller of pumps was presented. It utilized the multi-slice CT to scan its inner construction, and used a series of algorithms on digital image processing to treat the obtained images which contained information of design and inner construction of impeller on VC 6.0, 3-D model of surface was reconstructed and transformation from surface model to solid model was also fulfilled by pre-processing, 2-D image processing, 2-D geometric processing and 3-D reconstruction.
Number of references: 9
Main heading: Computerized tomography
Controlled terms: Digital image storage - Image processing - Imaging systems - Models - Pumps - Reengineering - Repair - Reverse engineering - Three dimensional - Three dimensional computer graphics - Two dimensional
Uncontrolled terms: 3D models - 3D reconstruction - Digital image processing - Geometric processing - Multislice CT - Pre-processing - Reconstruction of models - Solid model - Surface models - Three-dimensional reconstruction - VC 6.0
Classification code: 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 913.5 Maintenance - 801 Chemistry - 912.2 Management - 913.3 Quality Assurance and Control - 902.1 Engineering Graphics - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 461.1 Biomedical Engineering - 531 Metallurgy and Metallography - 618.2 Pumps - 722.1 Data Storage, Equipment and Techniques - 722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications
DOI: 10.3969/j.issn.1000-1298.2010.03.021
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
40. Accession number: 20101912918683
Title: Optimal methodology of single-unit variable speed operation in pumping station
Authors: Cheng, Jilin1 ; Zhang, Lihua1 ; Zhang, Rentian1, 2 ; Gong, Yi1 ; Zhu, Honggeng1 ; Deng, Dongsheng3
Author affiliation: 1 College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
2 Jiangsu Surveying and Design Institute of Water Resources Co., Ltd, Yangzhou 225009, China
3 Jiangsu Water Supply Co., Ltd. for S-to-N Water Diversion Project, Nanjing 210029, China
Corresponding author: Cheng, J. (jlcheng@yzu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 72-76
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 dynamic planning model for single-unit pump variable speed optimal operation was developed in which peak-valley electricity prices and variable water levels in down-stream were considered. In this model, the minimum electricity consumption cost in one-day operation was the objective function. The speed of pump was a decision variable and specified pumping water volume was the constraint. A comparison between optimized variable speed and fixed speed operations of a single-unit in Jiangdu No. 4 Pumping Station was made. The results show that within the head amplitude and with full-load operation, regardless of considering peak-valley electricity prices, the benefits of variable speed operation was not enough to compensate for energy losses of the VFD and considering the peak-valley electricity prices and part-load operation, the benefit was excellent while without considering peak-valley electricity prices and single-unit operates at 80% and 60% loads, the saving 15 to 18 years and 7 to 10 years can compensate respectively for the VFD investments.
Number of references: 14
Main heading: Pumps
Controlled terms: Costs - Energy dissipation - Investments - Landforms - Optimization - Pumping plants - Speed - Water levels
Uncontrolled terms: Decision variables - Down-stream - Dynamic planning - Electricity prices - Electricity-consumption - Energy loss - Fixed speed - Full-load - Objective functions - Optimal operation - Part load - Peak- valley - Pumping station - Pumping stations - Variable speed - Variable speed operation with VFD - Variable speed operations - Water volumes
Classification code: 931.1 Mechanics - 921.5 Optimization Techniques - 911.2 Industrial Economics - 911 Cost and Value Engineering; Industrial Economics - 618.2 Pumps - 614.2 Steam Power Plant Equipment and Operation - 525.4 Energy Losses (industrial and residential) - 481.1 Geology - 446 Waterworks - 407.2 Waterways - 402.1 Industrial and Agricultural Buildings
DOI: 10.3969/j.issn.1000-1298.2010.03.015
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
41. Accession number: 20101912918699
Title: Storage quality analysis of milk in non-encapsulation condition based on electronic nose
Authors: Yin, Yong1 ; Yu, Huichun1 ; Sun, Xiangli1
Author affiliation: 1 School of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003, China
Corresponding author: Yin, Y. (yinyong@mail.haust.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 149-152
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: Quality of milk after its packaging is damaged or unsealed is a great problem. Storage quality of milk was studied based on the electronic nose. Firstly, the samples of milk were measured by a gas sensor array, and different dynamic response values corresponding to the response times of 50, 100, 150, 200, 300, 400, 500 and 600th seconds were selected as the test samples. With the help of principal component analysis (PCA) and Fisher discriminant analysis (FDA), the change of milk quality was explored along with the increasing days of storage. At the same time, the preferable analysis range of dynamic response of the array was given, namely the 300- 600th second. Secondly, the mean values of dynamic response values of the range were also selected as representative results of the test samples, and the PCA and FDA were carried out respectively. The results showed that the two representative methods of the samples could discriminate the change of milk quality by PCA and FDA. So it is an effective method to analyze the change of milk quality in condition of non-encapsulation with an electronic nose.
Number of references: 5
Main heading: Quality control
Controlled terms: Artificial organs - Chemical sensors - Discriminant analysis - Dynamic response - Fisher information matrix - Principal component analysis - Sensor arrays - Statistical tests
Uncontrolled terms: Electronic nose - Fisher discriminant analysis - Gas sensor arrays - Mean values - Milk quality - Quality analysis - Response time - Storage quality - Test samples
Classification code: 922.2 Mathematical Statistics - 922 Statistical Methods - 913.3 Quality Assurance and Control - 903.1 Information Sources and Analysis - 801 Chemistry - 732 Control Devices - 716 Telecommunication; Radar, Radio and Television - 462.4 Prosthetics - 408.1 Structural Design, General
DOI: 10.3969/j.issn.1000-1298.2010.03.031
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
42. Accession number: 20101912918673
Title: Absorbing control of magneto-rheological variable stiffness and damping system under impact load
Authors: Dong, Xiaomin1, 2 ; Yu, Miao2 ; Liao, Changrong2 ; Chen, Weimin2
Author affiliation: 1 State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
2 Key Lab of Optoelectronic Technology and System of Education Ministry, Chongqing University, Chongqing 400044, China
Corresponding author: Dong, X. (xmdong@cqu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 20-24 39
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: To overcome the limitation of traditional absorber systems with invariable damping and stiffness characteristics which can only achieve good absorbing performance under designed conditions, a new absorber based on two magneto-rheological (MR) dampers was proposed to realize the variable damping and stiffness characteristics. As the first step, the theory of variable damping and stiffness characteristics of the proposed absorber was analyzed, and the adjustable range of variable damping and stiffness was also analyzed. Then an adaptive controller based on the energy principle and skyhook control was developed. Finally, a numerical simulation was performed to validate the proposed absorber and the controller. The simulations show that the absorbing system based on the MR absorber could greatly reduce the peak impact load of sprung mass with smaller stroke of absorbing system. Moreover, it has better performance than passive absorbing system, which shows that the absorber based on MR variable stiffness and damping is feasible in practice.
Number of references: 9
Main heading: Stiffness
Controlled terms: Computer simulation - Control system analysis - Controllers - Damping - Magnetos - Rheology
Uncontrolled terms: Adaptive controllers - Damping system - Designed conditions - Energy principles - Impact loads - Magneto-rheological - Magneto-rheological dampers - Magneto-rheological fluid - Numerical simulation - Semiactive control - Skyhook control - Sprung mass - System-based - Variable damping - Variable stiffness
Classification code: 931.1 Mechanics - 732.1 Control Equipment - 731.1 Control Systems - 723.5 Computer Applications - 951 Materials Science - 708.4 Magnetic Materials - 631.1 Fluid Flow, General - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 705.2 Electric Generators
DOI: 10.3969/j.issn.1000-1298.2010.03.005
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
43. Accession number: 20101912918696
Title: Relationship between dielectric properties from 10 to 4500MHz and internal quality of peaches
Authors: Guo, Wenchuan1 ; Chen, Keke1
Author affiliation: 1 College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author: Guo, W. (guowenchuan69@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 134-138
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to explore the potential of dielectric properties in determining fruit internal quality, peaches with different maturities were selected and coaxial open-ended probe technology was used to measure permittivity of peach pulp and juice over the frequency range from 10 to 4500MHz at 25°C. The moisture content of peach pulp, soluble solids content, pH value and electrical conductivity of juice were also measured. The results showed that the dielectric constants of pulp and juice decreased with increased frequency, while the loss factors changed with "V" type. The ionic conduction and dipolar polarization were the major loss mechanisms at lower frequencies and higher frequencies, respectively. The relationship between permittivity and soluble solids content, pH value, and moisture content was non-linear.
Number of references: 15
Main heading: Permittivity
Controlled terms: Electric conductivity of solids - Electric properties - Moisture - Moisture determination - pH effects
Uncontrolled terms: Dielectric constants - Electrical conductivity - Frequency ranges - Higher frequencies - Internal quality - Loss factor - Loss mechanisms - Lower frequencies - Moisture contents - Non-linear - Peach - Peach pulp - pH value - Probe technology - Soluble solids content
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 801.4 Physical Chemistry - 801.1 Chemistry, General - 944.2 Moisture Measurements - 708.1 Dielectric Materials - 701 Electricity and Magnetism - 443.1 Atmospheric Properties - 701.1 Electricity: Basic Concepts and Phenomena
DOI: 10.3969/j.issn.1000-1298.2010.03.028
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
44. Accession number: 20101912918690
Title: Fermentation and process optimization of mixed cow dung, chicken manure and rice straw for biogas production
Authors: Wang, Xiaojiao1 ; Li, Yibing1 ; Yang, Gaihe1 ; Li, Min1 ; Ren, Guangxin1 ; Feng, Yongzhong1
Author affiliation: 1 College of Agronomy, Northwest A and F University, Yangling, Shannxi 712100, China
Corresponding author: Li, Y. (liyibing@nwsuaf.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 104-108
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: Fermentation of raw materials can be mixed to make up for deficiencies of the single fermentation and in different degrees to enhance the effect of fermentation of raw materials. This research was carried out in controllable constant-temperature fermentation equipment. Cow dung, chicken manure and rice straw were selected with the proportions of TS ratio(0:2:1, 0.4:1.6:1, 0.8:1.2:1, 1.2:0.8:1, 1.6:0.4:1, 2:0:1) as raw materials, and biogas fermentation at temperatures of 15°C, 20°C, 25°Cand 30°C was studied. The main conclusions were drawn as follows: the biogas production rate and cumulative biogas yield of each proportion rose with the increase of temperature; the fermentation period was longest at 15°C, but there were no difference among the other temperatures; the cumulative biogas yield was first increased and then decreased with the change of proportion, that was fermentation of a mixture of three types of raw materials - cow dung, chicken manure and rice straw, was significantly better than the effect of the mixture of cow dung and rice straw, as well as the mixture of chicken manure and rice straw, but no significant impact on the fermentation period. The model predicted, with the optimal combination of technology, the temperature of 30°C and the TS ratio of cow dung, chicken manure and rice straw was respectively 1.22:0.78:1, the cumulative biogas yield was expected to reach maximum 28308.7mL.
Number of references: 14
Main heading: Fermentation
Controlled terms: Biogas - Manures - Mixtures - Optimization
Uncontrolled terms: Biogas fermentation - Chicken manure - Cow dung - Proportion - Rice straws
Classification code: 921.5 Optimization Techniques - 821.5 Agricultural Wastes - 805.1.1 Biochemical Engineering - 802.3 Chemical Operations - 802.2 Chemical Reactions - 801.2 Biochemistry - 522 Gas Fuels - 461.8 Biotechnology - 452.3 Industrial Wastes
DOI: 10.3969/j.issn.1000-1298.2010.03.022
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
45. Accession number: 20101912918678
Title: Numerical simulation on soil water movement under water storage pits irrigation
Authors: Ma, Juanjuan1 ; Sun, Xihuan1 ; Guo, Xianghong1 ; Li, Yongye1
Author affiliation: 1 College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Corresponding author: Sun, X. (sunxihuan@tyut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 46-51
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 the specialties of infiltration head higher and varying under the condition of water storage pits irrigation, numerical model of 3-D infiltration and the soil moisture movement of complicated boundary conditions in water storage pits was established. ADI method and GauessSeidel iterative method were used in numerical simulation followed by verification tests. The results showed that the calculated values were in accordance with the experimental results. This indicated the numerical model was correct and the method of solution was feasible.
Number of references: 12
Main heading: Mathematical models
Controlled terms: Geologic models - Irrigation - Moisture determination - Numerical methods - Seepage - Soil mechanics - Soil moisture - Three dimensional - Underwater soils
Uncontrolled terms: ADI method - Calculated values - Complicated boundary conditions - Numerical models - Numerical simulation - Soil water movement - Under water - Verification tests - Water storage - Water storage pits irrigation
Classification code: 944.2 Moisture Measurements - 921.6 Numerical Methods - 921 Mathematics - 902.1 Engineering Graphics - 821.3 Agricultural Methods - 723.5 Computer Applications - 483.1 Soils and Soil Mechanics - 481.1 Geology - 471.1 Oceanography, General - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI: 10.3969/j.issn.1000-1298.2010.03.010
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
46. Accession number: 20101912918695
Title: Effect of 1-MCP treatment and storage temperature on pulp browning of friar plum (prunus salicina lindell. cv. friar)
Authors: Shao, Yi1 ; Luo, Yunbo1 ; Chen, Anjun1 ; Lu, Chengwen1 ; Zhu, Benzhong1
Author affiliation: 1 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Zhu, B. (zbz@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 3
Issue date: March 2010
Publication year: 2010
Pages: 128-133
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Pulp browning seriously limits the dietary property and commercial value of plum fruit. In order to elucidate the browning mechanism of plum and to inhibit pulp browning, the effect of 1-MCP treatment and different storage temperature on chilling injury browning, mechanical injury browning, PPO activity, total phenols concentration and ethylene production of Friar plum was studied. The results indicated that, chilling injury browning of Friar plum developed after 75 or 60 days of storage at (0±0.5)°C or (3±0.5)°C, but never developed when fruits were stored at (7±0.5)°C, at which temperature, the storage period was short. Moreover, mechanical injury browning developed in pulp near peel after two days of storage at low temperature. Browning symptoms were efficiently reduced by 5μL/L 1-MCP treatment for 12h when fruits were stored at (0±0.5)°C. However, when the storage temperature was (3±0.5)°C or (7±0.5)°C, fruits treated with 1-MCP showed more serious browning symptoms than untreated fruits. In any case, both two kinds of browning are related to PPO activity and total phenols concentration.
Number of references: 22
Main heading: Food storage
Controlled terms: Agricultural products - Ethylene - Image storage tubes - Phenols
Uncontrolled terms: Chilling injury - Ethylene production - Low temperatures - Mechanical injury - Pulp storage - Storage periods - Storage temperatures - Total phenols
Classification code: 694.4 Storage - 714.1 Electron Tubes - 804.1 Organic Compounds - 821.4 Agricultural Products - 822.1 Food Products Plants and Equipment
DOI:10.3969/j.issn.1000-1298.2010.03.027
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
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