2009年第40卷第8期共收錄46篇
1. Accession number:20093712302781
Title: Rice hopper shape recognition based on fourier descriptors
Authors: Zhao, Sanqin1 ; Ding, Weimin1 ; Liu, Deying1
Author affiliation:1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Ding, W. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 181-184 160
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: Fourier descriptors(FDs) which didn't change with changes of translation, rotation and scale, and were also independent of the location of the beginning point of the image edge were analyzed. The FDs and Euclidean distance were applied to the recognition of the rice hopper shape. Average discrete degree of sogatella furcifera and rice hopper was calculated to test stability of FDs and coefficients reference value of shape feature was determined. Through 191 sample images tested, it was found that when similarity difference was less 0.0123, error rate of rice hopper was 7.85%. The experiment results indicated that this approach had a good recognition performance.
Number of references: 20
Main heading: Hoppers
Controlled terms: Content based retrieval - Fourier transforms
Uncontrolled terms: Euclidean distance - Fourier descriptors - Recognition - Rice hopper - Shape Classification code:691.1 Materials Handling Equipment - 723.2 Data Processing and Image Processing - 741 Light, Optics and Optical Devices - 921.3 Mathematical Transformations
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
2. Accession number:20093712302753
Title: Vehicle steering angle identification based on inverse system method
Authors: Zhang, Lixia1 ; Pan, Fuquan1
Author affiliation: 1 School of Automobile and Traffic, Qingdao Technological University, Qingdao 266520, China
Corresponding author: Zhang, L. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 40-43 22
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 application of inverse system theory to vehicle handling dynamics was proposed to study steering angle input by driver for vehicle accurately achieving the given lateral acceleration. Based on the state equation of vehicle steering angle input, with the stable, invertible, controllable and observable inverse system meeting, steering angle was identified with the lateral acceleration of closed-loop simulation and actual test respectively as the inverse system input. Steering angle of identification was compared to that of actual test. The results showed that steering angle trend of identification conforms to that of actual test, with the small absolute error of lateral acceleration.
Number of references: 11
Main heading: Automobile steering equipment
Controlled terms: Steering
Uncontrolled terms:Absolute error - Closed-loop simulations - Handling dynamics - Inverse system - Inverse system method - Inverse system methods - Inverse system theory - Lateral acceleration - Simulation - State equations - Steering angle - Steering angles - Vehicle-handling dynamics
Classification code: 662.4 Automobile and Smaller Vehicle Components - 663.2 Heavy Duty Motor Vehicle Components - 671.2 Ship Equipment
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
3. Accession number: 20093712302758
Title: Design of harvest ditch and stalk-disposing machine
Authors: Chen, Yulun1 ; Ding, Weimin1 ; Wang, Xiaochan1 ; Yang, Hongtu1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Ding, W. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 62-66
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 multifunctional machine with functions of harvest, ditch and stalk-disposing was developed, by using which, the working procedure of harvest, ditch and stalk-disposing can be implemented in one work operation. Test results showed that the power transmission system is reasonable, firm ditch device works well, trapezoid ditch (193 mm mean depth, 220 mm top and 160 mm bottom width) can be obtained and meets the agricultural requirement.
Number of references: 16
Main heading: Machine design
Controlled terms: Agricultural machinery - Electric power transmission - Harvesting - Power transmission - Statistical tests
Uncontrolled terms: Combined operation - Ditch - Multifunctional machines - Power transmission systems - Stalk return to cropland - Test results - Working procedure
Classification code: 601 Mechanical Design - 602.2 Mechanical Transmissions - 706.1.1 Electric Power Transmission - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 922.2 Mathematical Statistics
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
4. Accession number:20093712302745
Title: Characteristics of regulated and unregulated emissions of biodiesel blends in a common rail diesel engine
Authors: Zhang, Xusheng1 ; Wang, Haibin1 ; Zhao, Hui2 ; Hu, Zongjie2 ; Wu, Zhijun2 ; Li, Liguang2
Author affiliation: 1 School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China 2 College of Automotive Engineering, Tongji University, Shanghai 200092, China
Corresponding author:Li, L. (liguang@mail.#edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 1-6
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Characteristics of regulated and unregulated emissions of biodiesel blends (derived from waste oil) in a common rail diesel engine without any modification were investigated. The results showed that NOx emissions increase significantly with a higher blend ratio and NO2 concentration increases after two diesel oxidation catalysts. A linear relationship between the reduction of smoke number and the blend concentration is found. For unregulated gas emissions, MECHO emission is reduced with a higher blend concentration of biodiesel at full load as combustion improvement. Due to low sulfur of biodiesel, the range of SO2 reduction is between 20%-60% for pure biodiesel compared with diesel. Particles in nucleation mode are dominated by the sulfur content of biodiesel blends. Concerning the pure biodiesel, total particle number concentration is reduced due to the lowest sulfur content.
Number of references: 20
Main heading: Diesel engines
Controlled terms: Biodiesel - Concentration (process) - Gas emissions - Leakage (fluid) - Particle size - Reduction - Size distribution - Sulfur - Waste incineration
Uncontrolled terms: Biodiesel blends - Blend ratios - Common rail diesel engines - Concentration of - Diesel oxidation catalyst - Emissions - Full-load - High pressure common rail diesel engine - Linear relationships - Nucleation modes - Particle number concentration - Smoke Numbers - Sulfur contents - Unregulated emissions - Waste oil
Classification code: 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 619.1 Pipe, Piping and Pipelines - 922.2 Mathematical Statistics - 933.1 Crystalline Solids - 943.2 Mechanical Variables Measurements - 931.2 Physical Properties of Gases, Liquids and Solids - 612.2 Diesel Engines - 451.1 Air Pollution Sources - 452.1 Sewage - 452.3 Industrial Wastes - 423 Non Mechanical Properties and Tests of Building Materials - 452.4 Industrial Wastes Treatment and Disposal - 523 Liquid Fuels - 531.2 Metallography - 483.1 Soils and Soil Mechanics
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
5. Accession number:20093712302782
Title: Chaotic nonlinearity of giant magnetostrictive actuators
Authors: Zeng, Haiquan1
Author affiliation:1 Department of Mechanical Engineering, Xiamen University of Technology, Xiamen 361024, China
Corresponding author:Zeng, H. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 185-188 104
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: Nonlinearity between exciting current and output displacement spoils magnetostrictive actuators' performance. Chaotic nonlinearity is an important aspect of nonlinear character for magnetostrictive actuators. To explore the erratic behaviors of the actuators, a nonlinear dynamic model was established. The bifurcation diagrams, Lyapunov exponent, phase portrait, Poincare? mapping diagrams, amplitude spectrum, etc., which demonstrate dynamical characteristics of the system were obtained by numerical integration. Analysis indicates that under the condition of low frequency range, chaos would appear when exciting current is high and stiffness of the system is relatively low.
Number of references: 9
Main heading: Magnetostrictive devices
Controlled terms: Actuators - Bifurcation (mathematics) - Chaos theory - Differential equations - Dynamic response
Uncontrolled terms: Amplitude spectra - Bifurcation - Bifurcation diagram - Chaos - Dynamical characteristics - Giant magnetostrictive actuator - Giant magnetostrictive actuators - Low frequency range - Lyapunov exponent - Magnetostrictive actuator - Non-Linearity - Nonlinear characters - Nonlinear dynamic models - Nonlinear dynamic response - Numerical integrations - Phase portrait - Poincare
Classification code: 961 Systems Science - 931.1 Mechanics - 922 Statistical Methods - 921.2 Calculus - 921 Mathematics - 732.1 Control Equipment - 731.2 Control System Applications - 714 Electronic Components and Tubes - 708.4 Magnetic Materials - 704 Electric Components and Equipment - 632 Hydraulics, Pneumatics and Related Equipment, and Fluidics - 602.1 Mechanical Drives - 408.1 Structural Design, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
6. Accession number:20093712302778
Title: Agriculture extra-green image segmentation based on particle swarm optimization and k-means clustering
Authors: Zhao, Bo1 ; Song, Zhenghe2 ; Mao, Wenhua1 ; Mao, Enrong2 ; Zhang, Xiaochao1
Author affiliation: 1 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China 2 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Zhao, B. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 166-169
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 solve the disadvantage of image segmentation by K-means clustering to extra-green character used to be adopted in agricultural images, an image segmentation method based on the particle swarm optimization and the K-means clustering was proposed. Firstly, image pixels value was fast clustered with the K-means clustering. Regarding the results as the position of a particle, PSO can be used and the new class centers also can be re-calculated with the K-means clustering. Subsequently, the position of all particles got updated and the optimal threshold was obtained. Experimental results proved that the improved algorithm was an effective method for segmenting the object accurately from images, and applicable for various kinds of agricultural images with extra-green character.
Number of references:10
Main heading: Particle swarm optimization (PSO)
Controlled terms:Digital image storage - Image segmentation - Water supply systems
Uncontrolled terms: Extra-green character - Image pixels - Improved algorithm - K-means clustering - Optimal threshold
Classification code: 741.3 Optical Devices and Systems - 741.1 Light/Optics - 723.2 Data Processing and Image Processing - 921.5 Optimization Techniques - 723 Computer Software, Data Handling and Applications - 722.1 Data Storage, Equipment and Techniques - 446.1 Water Supply Systems - 722.4 Digital Computers and Systems
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
7. Accession number:20093712302759
Title:Simplified infiltration model of film hole irrigation and its validation
Authors:Ma, Xiaoyi1 ; Fan, Yanwei1, 2 ; Wang, Shuli1 ; Sun, Xiujuan1; Wang, Bolei1
Author affiliation:1 Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Northwest A and F University, Yangling, Shaanxi 712100, China 2 College of Fluid Power and Control Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Corresponding author: Ma, X. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 67-73
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on the theory for water movement in non-saturated soil, the mathematical model of film hole irrigation was developed to describe soil water movement, and the simulation was performed by using SWMS-3D software. According to the simulated results, the characteristics and infecting factors of infiltration of film hole irrigation was analyzed, and the simplified film hole infiltration model including the opening hole ratio and the film hole diameter was presented. The model was verified by infiltration experiments at several typical soils condition and other researcher's experiment results. It was showed that the model is simple and credible with less parameters, which can been using for deciding reasonable technological elements of film hole irrigation water to improve irrigation water quality.
Number of references: 12
Main heading: Hydraulic models
Controlled terms: Computer simulation languages - Computer software - Experiments - Geologic models - Irrigation - Mathematical models - Seepage - Simulators - Soil mechanics - Soil moisture - Three dimensional - Underwater soils - Water pollution - Water quality - Water supply
Uncontrolled terms: Film hole diameter - Film hole irrigation - Infiltration rate - Numerical simulation - Opening hole ratio - Simplified model
Classification code: 655.2 Satellites - 657.1 Solar Energy and Phenomena - 662.1 Automobiles - 671 Naval Architecture - 723 Computer Software, Data Handling and Applications - 723.1.1 Computer Programming Languages - 723.5 Computer Applications - 821.3 Agricultural Methods - 901.3 Engineering Research - 902.1 Engineering Graphics - 921 Mathematics - 654.1 Rockets and Missiles - 407 Maritime and Port Structures; Rivers and Other Waterways - 441 Dams and Reservoirs; Hydro Development - 445.2 Water Analysis - 446.1 Water Supply Systems - 453 Water Pollution - 453.2 Water Pollution Control - 471.1 Oceanography, General - 481.1 Geology - 483.1 Soils and Soil Mechanics - 621 Nuclear Reactors - 632.1 Hydraulics
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
8. Accession number: 20093712302750
Title:Engine performance employed diesel/LPG dual fuels
Authors:Fan, Qizhou1 ; Zheng, Jian1 ; Liu, Yanrong1
Author affiliation:1 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Fan, Q. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 27-30
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The systems including an electronic control unit (ECU), liquefied petroleum gas (LPG) supply system and LPG electronic control injection system were developed, by which a 295T DI diesel engine was successfully refitted. Subsequently, taking respectively diesel oil and LPG/diesel as fuel, under the same condition, performance tests of the modified engine were carried out. Results indicated that the refitted engine's power performance increased in a quite big range, economy performance became better, and NOx emission was lower; the CO level is closed to that of the prototype diesel engine; but the HC emission level was higher in low load stage and was lower in full load stage compared with prototype diesel engine. The research results also prove that our refitting scheme is feasible.
Number of references:5
Main heading:Diesel engines
Controlled terms: Butane - Carbon monoxide - Diesel fuels - Electronics industry - Engines - Gas industry - Liquefied petroleum gas - Machine design - Power electronics - Remote control - Servomechanisms
Uncontrolled terms: DI diesel engine - Diesel oil - Dual-fuel - Dual-fuels - Economy performance - Electronic control injection system - Electronic control units - Engine performance - Full-load - HC emissions - Low load - Multi-point injection - Performance test - Performance tests - Power performance - Research results - Supply system
Classification code: 713 Electronic Circuits - 713.5 Other Electronic Circuits - 714 Electronic Components and Tubes - 715 Electronic Equipment, General Purpose and Industrial - 911.2 Industrial Economics - 715.2 Industrial Electronic Equipment - 732.1 Control Equipment - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 731.1 Control Systems - 712 Electronic and Thermionic Materials - 705 Electric Generators and Motors - 521 Fuel Combustion and Flame Research - 522 Gas Fuels - 523 Liquid Fuels - 601 Mechanical Design - 612 Engines - 612.2 Diesel Engines - 617.3 Steam Engines - 654.2 Rocket Engines
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
9. Accession number: 20093712302776
Title: Navigation line detection arithmetic based on image rotation and projection
Authors: Ding, Youchun1, 2 ; Wang, Shumao1 ; Chen, Du1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China 2 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author: Wang, S. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 155-160
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A new tractor navigation line detection arithmetic, named rotation and projection arithmetic, was put forward. At first, the image ROI rotates a series of given angles and for each rotation the ROI's column average values were computed. And then the column average values and the enumeration angles compose the rotation and projection matrix R. Through all row vectors difference operation in R the difference rotation and projection matrix Rd was attained by whose extremum values the image navigation line parameters can be found out (including heading angle and lateral position). Finally the world coordinate guidance line parameters were attained by those parameters. By using the same principle the field end line can also be detected. In order to make the arithmetic more efficient, there are four measures to be used: setting appropriate ROI, utilizing linear reducing, starting as rough-divisiory rotation angle and then elaborate-divisiory rotation angle, using the former frame information. Those measures make one frame processing time in 6.2ms or so. Using various mature wheat images testing indicates that the precision rate of recognizing navigation line is up to 95%.
Number of references:19
Main heading:Rotation
Controlled terms: Harvesters - Image processing - Imaging systems – Navigation
Uncontrolled terms: Automatic guidance - Average values - Combine harvester - Frame processing - Heading angles - Image navigation - Image rotation - Line detection - Line parameters - Precision rates - Projection matrix - Rotation angles - World coordinates
Classification code: 821.1 Agricultural Machinery and Equipment - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 723.2 Data Processing and Image Processing - 931.1 Mechanics - 716.3 Radio Systems and Equipment - 601.1 Mechanical Devices - 434.4 Waterway Navigation - 431.5 Air Navigation and Traffic Control - 655.1 Spacecraft, General
Database: Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
10. Accession number: 20093712302786
Title:Generation and optimization of process routing based on genetic algorithm
Authors:Liu, Wei1 ; Wang, Taiyong1
Author affiliation:1 Tianjin Key Laboratory of Advanced Manufacturing Technologies and Equipments, Tianjin University, Tianjin 300072, China
Corresponding author:Liu, W. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:203-208 202
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Aiming at the decision-making problem of process route in a CAPP system, an algorithm based on the genetic algorithm for optimization of process route was illustrated by an example. A machined part was divided into some feature cells machining chains of that were generated by reverse design. Then the preference sequence of feature cells was determined and the objective function was built. A checking program was designed to ensure the validity of chromosomes. The fitness function was built based on the objective function. The operator algorithms of replication, crossover and mutation were designed and the process route were optimized using the genetic algorithm. At last, the feasibility and effectiveness were verified by an example.
Number of references:16
Main heading:Routing algorithms
Controlled terms: Cell membranes - Function evaluation - Genetic algorithms - Mathematical operators - Optimization
Uncontrolled terms: CAPP - Crossover and mutation - Decision-making problem - Feature cell - Fitness functions - Objective functions - Process route - Process routing
Classification code: 461.2 Biological Materials and Tissue Engineering - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.5 Optimization Techniques - 921.6 Numerical Methods
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
11. Accession number: 20093712302762
Title:Analysis of instability for charged liquid jets with the needle-plate electrodes
Authors:Wang, Zhaohui1 ; Liao, Zhenfang1
Author affiliation:1 Department of Mechanical Engineering, Chongqing University, Chongqing 400044, China
Corresponding author:Wang, Z. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:86-91
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 models of charged liquid jets and Lagrange equation under the generalized coordinate, the dispersion equations of inviscid liquid jets in an electrostatic field were established and solved by using the numerical methods. According to analyzing the calculated values, the effects of different factors on axisymmetric models and non-axisymmetric models of charged liquid jets were studied. The results showed as follows. The maximum value of the disturbed growth rate of charged liquid jets is increased with the stronger electric field intensity. When the voltage is lower, the electrostatic field has a significant effect on the axisymmetric instability models. The non-axisymmetric instability models exert a dominant influence since the voltage is enhanced gradually in an electrostatic field and it leads the droplets to break up finally. Instability of charged liquid jets is increased as the jet radius reduces. The changes of the jet radius in the non-axisymmetric modles have more effects on the instability of charged liquid jets than in the axisymmetric models. The effects of different liquid dielectrics on the non-axisymmetric charged liquid jets instability become very obvious.
Number of references:15
Main heading:Liquids
Controlled terms: Dielectric properties of liquids - Dispersions - Electric fields - Electric potential - Electrodes - Equations of motion - Jets - Needles - Numerical methods - Stability
Uncontrolled terms: Axisymmetric - Axisymmetric models - Break-up - Calculated values - Charged liquids - Dispersion equation - Dispersion equations - Electric field intensities - Electrostatic field - Generalized coordinates - Instability - Instability model - Inviscid liquid - Lagrange equation - Liquid dielectrics - Liquid jets - Maximum values - Plate electrodes
Classification code: 961 Systems Science - 801.3 Colloid Chemistry - 819.6 Textile Mills, Machinery and Equipment - 921.2 Calculus - 921.6 Numerical Methods - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science - 801 Chemistry - 462.1 Biomedical Equipment, General - 631.1 Fluid Flow, General - 701 Electricity and Magnetism - 731.4 System Stability - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 714.1 Electron Tubes - 704.1 Electric Components
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
12. Accession number: 20093712302755
Title: Experiment of the finger-chain type sugarcane-lifter
Authors: Mou, Xiangwei1 ; Ou, Yinggang1 ; Zhang, Yang2
Author affiliation: 1 Key Laboratory of Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China 2 Electrical and Mechanical Engineering Department, Guangzhou Institute of Railway Technology, Guangzhou 510430, China
Corresponding author: Ou, Y. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 49-53
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 finger-chain type sugarcane-lifter was studied. The orthogonal and single experiments were conducted to study the following factors: advancing velocity vm, rotational speed of driven sprocket n, lateral-angle β of slideway and oblique-angle α of slideway. The mathematical models for the two evaluations index which contained lodging angle after lifting and different factors were constructed by using the method of mathematical statistics. And the parameters of the sugarcane-lifter were optimized. The results of experiments showed that these four factors had significant impact on lodging angle after lifting. The optimal parameters were as following: the function between rotational speed of driven sprocket n and advancing velocity vm was n=-1599.618 vm2 1609.678vm, the oblique-angle equaled to 60° and the lateral-angle equaled to 10°.
Number of references:9
Main heading:Experiments
Controlled terms: Harvesters - Mathematical models - Slideways - Sprockets - Statistics - Wheels
Uncontrolled terms: Chain-type - Finger-chain - Lodging angle after lifting - Mathematical statistics - Optimal parameter - Rotational speed - Significant impacts - Sugarcane harvester - Sugarcane-lifter
Classification code: 601.2 Machine Components - 603.2 Machine Tool Accessories - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research - 921 Mathematics - 922.2 Mathematical Statistics
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
13. Accession number: 20093712302779
Title: Feature acquisition of cucumber fruit in unstructured environment using machine vision
Authors: Yuan, Ting1 ; Zhang, Junxiong1 ; Li, Wei1 ; Ren, Yongxin1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Yuan, T. ([email protected])
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 40
Issue: 8
Issue date: August 2009
Publication year: 2009
Pages: 170-174 218
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A machine vision approach for the detection of greenhouse cucumbers with near-infrared spectral imaging was presented. Firstly, a spectral image using certain near-infrared wavelength was applied to resolve the fruit information representation within the similar-color background. Secondly, fruit was recognized based on the following steps: region partition according to gray distribution of vertical histogram, optimized threshold of invariable intensity moment on divided local image, noise elimination using specified morphological template. Thirdly, the region for robotic grasping of cucumber fruit was determined by texture feature analysis and the cutting point was located with inertia axis principle. The experimental results showed that the correct recognition rate of fruit is 93.3%, as well as the rates of the grasping point and cutting point within the effective range are 96.7% and 93.1% respectively.
Number of references: 10
Main heading: Fruits
Controlled terms: Computer vision - Data processing - Greenhouses - Imaging systems - Infrared devices - Infrared imaging
Uncontrolled terms: Cucumber - Cutting point - Effective range - Feature acquisition - Gray distribution - Greenhouse cucumbers - Information processing - Information representation - Intensity moment - Machine vision - Near Infrared - Near-infrared image - Near-infrared wavelength - Noise elimination - Recognition rates - Region partition - Robotic grasping - Spectral images - Texture features - Unstructured environments
Classification code: 821.4 Agricultural Products - 746 Imaging Techniques - 741.3 Optical Devices and Systems - 741.2 Vision - 821.6 Farm Buildings and Other Structures - 741 Light, Optics and Optical Devices - 723.5 Computer Applications - 723.2 Data Processing and Image Processing - 402.1 Industrial and Agricultural Buildings - 731.6 Robot Applications
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
14. Accession number: 20093712302756
Title:Critical speed of impact damage on a rice kernel
Authors:Xu, Lizhang1 ; Li, Yaoming1
Author affiliation:1 Key Lab. of Modern Agricultural Equipment and Technology, Ministry of Edu. and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Xu, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:54-57
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: Impact damage is the main form of rice threshing and one of the significant causes of rice injury. Based on the contact mechanics, models of the compressed displacement and the largest pressure distribution were established, as the threshing component centrally collided with a rice kernel. Due to the difference of moisture content, rice kernels plastic mechanics and brittle mechanics were different. The critical speed formula about impact damage was obtained as the rice kernel collided with the threshing element. Furthermore, the critical speed was calculated for the impact damage as to the spike tooth and the rice of zhendao10, wuxiangjing14, huaidao9, zhennuo653 and xieyou084. Besides, experimental study was performed on the test platform which proved that the experimental mean value was by and large in according with the theoretical calculation.
Number of references:13
Main heading:Grain (agricultural product)
Controlled terms:Agriculture - Speed - Statistical tests
Uncontrolled terms:Critical speed - Damage - Impact - Rice kernel - Threshing
Classification code: 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 922.2 Mathematical Statistics - 931.1 Mechanics
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
15. Accession number:20093712302774
Title:Study on synthesis of wheat starch stearate by dry method and its properties
Authors:Liu, Guoqin1 ; Chen, Jie1 ; Han, Lipeng1 ; Li, Lin1
Author affiliation:1 School of Food Science and Technology, Henan University of Technology, Zhengzhou 450052, China
Corresponding author:Li, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:143-148 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: Wheat starch stearate was synthesized by esterification of wheat starch with stearic acid, and hydrochloric acid was added as catalyzer. The effects of temperature, homogenizing rate and pH value on emulsion capacity and the effects of temperature and shearing rate on viscosity were investigated. Furthermore, the product properties, such as color, transparency percentage, retrogradation, freeze-thaw stability were also determined. The results showed that the emulsion capacity of starch stearate is superior to that of arabic gum, with the similar change trend resulting from pH value. Therewith, the chromatism value of starch stearate was similar to that of arabic gum. As DS (degree of sustitution) increased, the color changed into yellow, transparency percentage enhanced, retrogradation weakened, and freeze-thaw stability fell.
Number of references:16
Main heading:pH effects
Controlled terms: Acids - Elasticity - Emulsification - Esters - Hydrochloric acid - Plasticity - Rheology - Starch - Stearic acid - Synthesis (chemical) - Temperature - Thawing - Thermal effects - Transparency - Viscosity
Uncontrolled terms: Arabic gums - Effects of temperature - Freeze-thaw stability - pH value - Product property - Rheology properties - Shearing rates - Wheat starch
Classification code: 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 815.1.1 Organic Polymers - 803 Chemical Agents and Basic Industrial Chemicals - 822.2 Food Processing Operations - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science - 822.3 Food Products - 802.3 Chemical Operations - 422 Strength of Building Materials; Test Equipment and Methods - 531 Metallurgy and Metallography - 619.1 Pipe, Piping and Pipelines - 631.1 Fluid Flow, General - 421 Strength of Building Materials; Mechanical Properties - 641 Heat and Mass Transfer; Thermodynamics - 741.1 Light/Optics - 801.1 Chemistry, General - 802.2 Chemical Reactions - 641.1 Thermodynamics
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
16. Accession number: 20093712302751
Title:Geometry based parametric bond graph model of diesel cooling fan-channel analysis
Authors:Li, Xiaotian1 ; Wang, Anlin1 ; Ci, Jian1 ; Wu, Renzhi1
Author affiliation:1 College of Mechanical Engineering, Tongji University, Shanghai 201804, China
Corresponding author:Wang, A. (wanganlin@mail.#edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:31-35
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A bond graph model was established for the air-flow calculation of the diesel engine's heat dissipation system, to find out the relations between the design parameters and system's heat dissipation performance, especially when there was a lack of supportive data. By overall consideration of influences of the fan's parameters and the aerodynamics on the system's final performance, the bond graph was applied to calculate the power-loss during the process. Then a mathematic model of power flow with the design parameters of geometric parameters and air characteristics, where the flow-rate of the radiator's air duck could be calculated according to the fan's rotational speed. Formula of air speed distribution was also proposed that matched the data from field test. The bond graph model of the fan-channel is proved to be an effective estimation method of flow rate.
Number of references:6
Main heading:Graph theory
Controlled terms: Air - Channel estimation - Cooling - Cooling systems - Diesel engines - Flow rate - Large scale systems - Thermoelectric equipment
Uncontrolled terms: Air flow - Air flow rate - Air speed - Bond graph - Bond graph model - Channel - Channel analysis - Design parameters - Estimation methods - Field test - Geometric parameter - Heat dissipation - Mathematic model - Power flows - Rotational speed
Classification code: 718 Telephone Systems and Related Technologies; Line Communications - 731.1 Control Systems - 802.3 Chemical Operations - 961 Systems Science - 804 Chemical Products Generally - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 943.2 Mechanical Variables Measurements - 912.3 Operations Research - 716 Telecommunication; Radar, Radio and Television - 704.2 Electric Equipment - 461.1 Biomedical Engineering - 612.2 Diesel Engines - 615.4 Thermoelectric Energy - 616.1 Heat Exchange Equipment and Components - 631 Fluid Flow - 641.2 Heat Transfer
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
17. Accession number: 20093712302760
Title:Correlations between dynamic surface tension and droplet diameter
Authors:Zhao, Hui1 ; Song, Jianli1 ; Zeng, Aijun1 ; He, Xiongkui1
Author affiliation:1 College of Science, China Agricultural University, Beijing 100083, China
Corresponding author:He, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:74-79
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to study the relationship between the atomization properties and dynamic surface tension(DST) of pesticide surfactants aqueous solutions, the median volume diameter (D50) of agriculture flat-fan nozzle were measured, with the particular emphasis on the effects of different nozzles and pressures. The results showed that the D50 was correlated linearly with γ0.023; the D50 increased resulted from DST with the increase of the nozzle type under the same pressure; with the increase of the pressure, the D50 decreased for the same nozzle.
Number of references:17
Main heading:Surface waves
Controlled terms: Atomization - Capillarity - Drop formation - High pressure effects - Jets - Nozzles - Surface active agents - Surface chemistry - Surface properties - Surface tension - System theory - Wetting
Uncontrolled terms: Aqueous solutions - Droplet - Droplet diameters - Dynamic surface tension - Dynamic surface tensions - Fan nozzles - Median volume diameterClassification code:804.1 Organic Compounds - 804.2 Inorganic Compounds - 912.3 Operations Research - 931 Classical Physics; Quantum Theory; Relativity - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science - 961 Systems Science - 803 Chemical Agents and Basic Industrial Chemicals - 461.1 Biomedical Engineering - 631.1 Fluid Flow, General - 711 Electromagnetic Waves - 731.4 System Stability - 751 Acoustics, Noise. Sound - 801.4 Physical Chemistry - 802.3 Chemical Operations
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
18. Accession number:20093712302783
Title:Precision measurement technology for small parts using LSSVR
Authors:Zhang, Xiuzhi1 ; Wang, Longshan1 ; Yu, Zhongdang2
Author affiliation:1 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China 2 Institute of Information Science and Engineering, Bohai University, Jinzhou 121013, China
Corresponding author:Wang, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:189-192
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: With the study object of tooth shaped chain board, a precise measurement technology for small parts was proposed using image processing technologies combined with least square support vector for regression (LSSVR). Electric coupling apparatus (CCD) was adopted as the sensor to collect images, single pixel edge information of the undeterminate part was obtained after image preprocessing such as image denoising and image binaryzation, etc. Afterwards, on the basis of structure feature analysis of the part, candidate regions were searched automatically where the coordinates of the points were taken out as training point set to train LSSVR. Then the candidate geometry parameters, such as the included angle between every two lines, diameters of the round holes as well as errors of the two round holes were gained through experiment esults. The last two geometry parameters with millimeter unit were obtained through unit transmitting from pixel to millimeter by camera calibration, and the precision can attain the micron level. The experiment showed that the proposed solution has a high convergence speed as along with the high precision and excellent stability.
Number of references:9
Main heading:Experiments
Controlled terms: Dentistry - Image processing - Imaging systems - Measurement theory - Pixels - Regression analysis
Uncontrolled terms: After-images - Camera calibration - Convergence speed - Edge information - Electric coupling - Geometry parameter - High precision - Image de-noising - Image processing technology - Least Square - Least square support vector regression - Micron level - Point set - Precise measurements - Precision measurement - Single pixel - Structure features - Support vector - Tooth shaped chain board - Two-line
Classification code: 922 Statistical Methods - 901.3 Engineering Research - 746 Imaging Techniques - 742.2 Photographic Equipment - 741 Light, Optics and Optical Devices - 922.2 Mathematical Statistics - 723.5 Computer Applications - 722.2 Computer Peripheral Equipment - 462.3 Dental Equipment and Supplies - 461.6 Medicine and Pharmacology - 461.1 Biomedical Engineering - 723.2 Data Processing and Image Processing
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
19. Accession number: 20093712302765
Title:Optimization of the technology for straw briquette cold press process
Authors:Sun, Qing1 ; Bai, Hongchun1 ; Gu, Shiyan1 ; Zhang, Chunmei1 ; Gao, Wei1 ; Yi, Weiming2
Author affiliation:1 Engineering College, Shenyang Agricultural University, Shenyang 110161, China 2 School of Light Industry and Agriculture Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author:Sun, Q. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:100-104
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Taking particles of rice straw as material, using straw treated by alkali as binder, adopting the quadratic orthogonal rotation design, the effects of various pressure, the additive proportion of binder, the moisture content and the grain size of raw materials on the loose density and the dropping intensity of briquette fuels was studied. A mathematical model of experiment with four factors was established and analyzed by regress method in SPSS 13.0 and response method in Matlab 7.1. The results showed that the regression equation was significant. The optimum factors were as follows, the pressure was 32 MPa, the additive proportion of bonder was 4:1, the moisture content was 10%, and the grain size of raw materials was 4 mm. Under this condition, the loose density reaches 1.188 g/cm3, and the dropping intensity reaches 65.417%.
Number of references:7
Main heading:Grain (agricultural product)
Controlled terms: Binders - Briquets - Briquetting - Grain size and shape - Mathematical models - MATLAB - Moisture - Moisture determination - Optimization - Presses (machine tools) - Rotation
Uncontrolled terms: Cold press process - Grain size - Moisture contents - Press process - Quadratic orthogonal rotation - Quadratic orthogonal rotation design - Regression equation - Rice straw - Rice straws
Classification code: 803 Chemical Agents and Basic Industrial Chemicals - 821.4 Agricultural Products - 921 Mathematics - 802.3 Chemical Operations - 921.5 Optimization Techniques - 933.1.1 Crystal Lattice - 944.2 Moisture Measurements - 931.1 Mechanics - 801.4 Physical Chemistry - 524 Solid Fuels - 531.2 Metallography - 534.2 Foundry Practice - 443.1 Atmospheric Properties - 601.1 Mechanical Devices - 723.1.1 Computer Programming Languages - 723.5 Computer Applications - 603.1 Machine Tools, General
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
20. Accession number:20093712302768
Title:Pore network model for drying of corn material in bin
Authors:Yuan, Yuejin1 ; Xu, Yingying1 ; Liu, Xiangdong2
Author affiliation:1 College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China 2 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Liu, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:115-118
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Taking the corn material in bin as the study object, a pore network model for the corn drying was developed by applying the theories of drainage and percolation through porous media and transport-process. Various factors for the drying process, such as the heat and mass transfer in grain itself, vapor-phase convection, temperature gradient, as well as physical structure characteristic were considered into this model. Five independent variables were involved in this model, which was able to describe the drying process of corn material more effectively than the traditional drying model. Moreover, the physical structure characteristic parameters of corn material, such as porosity, pore size distribution and so on, as the model parameters, were input the model directly to predict the drying characteristic of corn material.
Number of references:16
Main heading:Dewatering
Controlled terms: Bins - Curing - Drying - Food technology - Mass transfer - Pore size - Porous materials - Solvents
Uncontrolled terms: Corn material - Drying characteristics - Drying model - Drying process - Dual-scale - Heat and mass transfer - Independent variables - Model parameters - Physical structures - Pore network model - Pore-network models - Porous Media - Temperature gradient - Vapor Phase
Classification code: 951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 822 Food Technology - 818.3 Rubber and Elastomer Processing - 815.1 Polymeric Materials - 813.2 Coating Materials - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 802.2 Chemical Reactions - 694.4 Storage - 642.1 Process Heating - 641.3 Mass Transfer
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
21. Accession number:20093712302757
Title:Response of taped type rice direct seeding machine for field surface roughness
Authors:Ren, Wentao1 ; Lu, Xiaorong1 ; Zhang, Benhua1
Author affiliation:1 College of Engineering, Shenyang Agricultural University, Shenyang 110161, China
Corresponding author:Ren, W. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:58-61
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: In order to investigate the adaptability of the developed taped type rice direct seeding machine for field surface roughness, dynamic simulated experiments were carried out. A field surface roughness measuring system composed of two angular displacement sensors, an A/D converter, a computer etc. was designed according to the structure and working principle of the seeding machine. The two types of field surface roughness, one known as original field surface roughness formed by the working of rotavator and the other known as rolled field surface roughness formed by the roller of the seeding machine, were detected. The signals were analyzed in time-domain and frequency-domain by using Matlab software. Transfer functions were established by the method of identification, and the dynamic characteristics of the system were analyzed. The results showed that the 'soil-machine' system is linear with the first order typical feature. The dynamic characteristics of the systems such as rapidity, bandwidth and soil covering thickness are able to satisfy the requirements of rice seeding technology.
Number of references:12
Main heading:Transfer functions
Controlled terms: Frequency domain analysis - MATLAB - Metal analysis - Soils - Surface properties - Surface roughness - Thickness control
Uncontrolled terms: A/D converter - Angular displacement - Direct-seeding - Dynamic characteristics - Field surface roughness - First order - Frequency domains - Matlab- software - Measuring systems - Rice - Seeding technology - Simulated experiments - Taped type rice direct seeding machine - Time domain - Working principles
Classification code: 951 Materials Science - 731.3 Specific Variables Control - 741.1 Light/Optics - 801 Chemistry - 921 Mathematics - 921.3 Mathematical Transformations - 931.2 Physical Properties of Gases, Liquids and Solids - 731.1 Control Systems - 723.1.1 Computer Programming Languages - 703.1.1 Electric Network Analysis - 703.1 Electric Networks - 531 Metallurgy and Metallography - 483.1 Soils and Soil Mechanics - 723.5 Computer Applications
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
22.Accession number:20093712302766
Title:Effect of ultrasound treatment on physicochemical and functional properties of wheat germ globulin
Authors:Jia, Junqiang1 ; Ma, Haile1 ; Zhao, Weirui1 ; Wang, Zhenbin1 ; He, Ronghai1 ; Luo, Lin1
Author affiliation:1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Ma, H. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:105-110
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to improve the functional properties of wheat germ globulin, the ultrasound treatment method is adopted. Effect of ultrasound treatment on physicochemical and functional properties of wheat germ globulin is studied. Results show that free sulfhydryl and disulfide bond contents, ultraviolet spectrum, and fluorescence spectra of wheat germ globulin are changed significantly after ultrasound treatment. The hydrophobicity, foaming capacity, foaming stability, emulsifying activity and emulsifying stability of wheat germ globulin decrease with the increase of ultrasonic power. When the ultrasonic power is more than 900W, the hydrophobicity, foaming capacity, foaming stability, emulsifying activity and emulsifying stability of wheat germ globulin are improved due to wheat germ globulin unfolding and exposed hydrophobic group increasing. Moreover, ultrasonic power has significant influence on the solubility of wheat germ globulin, which is gradually increased with the increase of ultrasonic power. Thus, ultrasound treatment could be used to modify the physicochemical and functional properties of wheat germ globulin by appropriate selection of ultrasonic power level.
Number of references:22
Main heading:Ultrasonics
Controlled terms: Acoustic waves - Emulsification - Hydrophobicity - Stability - Ultrasonic transmission - Ultraviolet spectroscopy
Uncontrolled terms: Disulfide bonds - Emulsifying activity - Emulsifying stabilities - Fluorescence spectra - Functional properties - Hydrophobic groups - Physicochemical properties - Sulfhydryl - Ultrasonic power - Ultrasound treatment - Ultrasound treatments - Ultraviolet spectrum - Wheat germ - Wheat germ globulin
Classification code: 961 Systems Science - 951 Materials Science - 932.2 Nuclear Physics - 931.3 Atomic and Molecular Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 931 Classical Physics; Quantum Theory; Relativity - 802.3 Chemical Operations - 801 Chemistry - 753.1 Ultrasonic Waves - 751.1 Acoustic Waves - 731.4 System Stability
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
23. Accession number:20093712302780
Title: Duck egg's shell intensity model based on fusion of computer vision and impact excitation
Authors: Liu, Peng1 ; Tu, Kang1 ; Pan, Leiqing1
Author affiliation:1 College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Tu, K. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:175-180
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Computer vision analysis and impact excitation frequency analysis were used to construct the duck egg's intensity model. By the analysis in the CV (coefficient of variation) of the duck egg's impact excitation frequency and the analysis of the crack egg's intensity, the threshold value (λ=0.02) which can be applied to distinguish the duck egg intensity at the level of 1MPa (confidence at the level of 95%) was obtained. Then the characteristic variables were entered into the model. The backward elimination procedure was used to perform multi-dimensional linear regression in order to establish the forecast model of the non-crack duck eggs' shell intensity. Combined with the threshold value which had been obtained, the system model of duck egg's shell intensity based on the multi-sensor fusion can be obtained. The confirmation experiment indicates that the model had good adaptability on duck-eggs with different color and mass, the model shows high accuracy (the mean of forecast error is 3.1%) as well as good stability (the standard deviation of forecast error is 0.003).
Number of references:12
Main heading:Sensor data fusion
Controlled terms: Computer vision - Cracks - Forecasting - Model structures - Regression analysis - Sensors - Shells (structures)
Uncontrolled terms: Data association - Duck egg - Egg shell intensity - Multi-dimensional linear regression - Multi-sensor fusion
Classification code: 921 Mathematics - 912.2 Management - 801 Chemistry - 741.2 Vision - 732.2 Control Instrumentation - 922.2 Mathematical Statistics - 731.6 Robot Applications - 723.2 Data Processing and Image Processing - 421 Strength of Building Materials; Mechanical Properties - 408.2 Structural Members and Shapes - 408 Structural Design - 723.5 Computer Applications
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
24. Accession number:20093712302790
Title:Real-time monitoring system for micro-drilling based on virtual instrument technology
Authors:Jia, Qingxiang1 ; Yang, Zhaojun1 ; Li, Xue2
Author affiliation:1 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China 2 College of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China
Corresponding author:Jia, Q. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
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: In order to keep drill out of breaking in the micro-drilling process, a real time monitoring and controlling system for micro-drilling was built based on virtual instrument technology. The system took IPC as main controller and used the Holl current sensor to monitor the spindle motor currents. The sampled data were processed by software written in LabVIEW language, which the functions such as the virtual oscillograph, the virtual spectrum analyzer, the digital filter etc. were implemented. In the experiment taking the spindle motor currents as monitoring objective, the monitoring and controlling threshold was determined according to the relationship between the failure distribution function and the reliability function of the drills. When the monitoring value exceeds the threshold given, the feed motion is forced to backward and a warning is given to indicate tool changing. The experimental result shows that the system together with monitoring and controlling method is able to effectively avoid drill breaking and increases the usage of the micro-drill.
Number of references:7
Main heading:Drills
Controlled terms: Computer programming languages - Digital filters - Digital instruments - Distribution functions - Drilling - Monitoring - Motors - Spectrum analyzers - Steel bridges
Uncontrolled terms: Current sensors - Failure distribution function - LabViEW - Micro drills - Micro-drilling - Monitoring and controlling - Real-time monitoring and controlling - Real-time monitoring systems - Reliability functions - Sampled data - Spindle motor currents - Virtual instrument - Virtual instrument technology - Virtual oscillographs
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 705.3 Electric Motors - 723.1.1 Computer Programming Languages - 922.1 Probability Theory - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 703.2 Electric Filters - 632.2 Hydraulic Equipment and Machinery - 604.2 Machining Operations - 603.2 Machine Tool Accessories - 545.3 Steel - 401.1 Bridges - 632.4 Pneumatic Equipment and Machinery
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
25. Accession number:20093712302764
Title:Experiment on plasma pyrolysis of corn stalk for liquid fuel
Authors:Zhang, Chunmei1 ; Liu, Ronghou2 ; Yi, Weiming3 ; Sun, Qing1
Author affiliation:1 College of Engineering, Shenyang Agricultural University, Shenyang 110161, China 2 School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China 3 Shandong Research Center of Engineering and Technology for Clean Energy, Shandong University of Technology, Zibo 255049, China
Corresponding author:Yi, W. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
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: This experimental study on plasma pyrolysis of corn stalk and the feature of bio-oil was carried out in a self manufactured small fluidized bed reactor with corn stalk. Results showed that the temperature in the fluidized bed was steady under the condition of adopting the plasma body to heat the reactor, and the preheat time is 1.5 h. The heating value of pyrolysis liquid-bio-oil was analyzed. The heating value of crude bio-oil obtained is 18066.62 kJ/kg. Heating value after taking off carbons is lower by 3446.71 kJ/kg than that of before taking off carbons. Thus, there is some certain solid charcoal in the bio-oil. The bio-oil after taking off the carbon was get rid of the water, which heating value is one time higher than that of the bio-oil after only taking off the carbon, with the difference of 14345.95 kJ/kg.
Number of references:6
Main heading:Plasmas
Controlled terms: Biomass - Charcoal - Chemical reactors - Fluid catalytic cracking - Fluid dynamics - Fluidization - Fluidized beds - Heating - Liquids - Pyrolysis - Thermogravimetric analysis
Uncontrolled terms: Bio-oil - Corn stalk - Experimental studies - Fluidized bed reactors - Heating value - Plasma pyrolysis - Pyrolysis liquids
Classification code: 932.3 Plasma Physics - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 802.3 Chemical Operations - 805.1.1 Biochemical Engineering - 811.2 Wood and Wood Products - 821.5 Agricultural Wastes - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 801 Chemistry - 513.1 Petroleum Refining, General - 521.2 Combustors - 524 Solid Fuels - 643.1 Space Heating - 525.1 Energy Resources and Renewable Energy Issues - 642.1 Process Heating - 642.2 Industrial Furnaces and Components - 631.1 Fluid Flow, General
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
26. Accession number:20093712302748
Title:Effects of EGR on burning process and NOx emission of electronic controlled LPG injection SI engine
Authors:Hu, Chunming1 ; Liu, Na1 ; Li, Wei1 ; Song, Xijuan1
Author affiliation:1 Tianjin Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072, China
Corresponding author:Hu, C. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:18-22
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: This study was focused on the impact of the changes of the EGR rate on combustion, emissions and the coefficient of variation of LPG engine at lean burn conditions. Test data showed that dual-spark plug-based rapid burning system increased the combustion heat release of LPG mixture, and improved the rapid burning process of LPG engine with EGR. Meanwhile, the excess air ratio limits of LPG lean-burning was largely extended within the total effective range of EGR rate(REGR). At the equivalent running conditions of LPG engine, largely extended REGR restrained the formation of NOx emission by high combustion temperature. The highest REGR of rapid combustion process was increased from 5% to 8.11% of normal combustion process. Additionally, the coefficient of variation of LPG combustion process got control effectively.
Number of references:10
Main heading:Process control
Controlled terms: Combustion - Electric sparks - Engines - Smoke - Thermochemistry
Uncontrolled terms: Burning process - Coefficient of variation - Combustion heat - Combustion pro-cess - Combustion temperatures - Dual-spark plug - Effective range - EGR - Electronic controlled LPG injection SI engine - Excess air ratios - Lean-burn conditions - LPG engine - Normal combustion - Rapid burning process - Running conditions - SI Engines - Test data
Classification code: 804 Chemical Products Generally - 801.4 Physical Chemistry - 801.3 Colloid Chemistry - 731 Automatic Control Principles and Applications - 701.1 Electricity: Basic Concepts and Phenomena - 654.2 Rocket Engines - 641.1 Thermodynamics - 617.3 Steam Engines - 612 Engines - 521.1 Fuel Combustion - 451.1 Air Pollution Sources
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
27. Accession number:20093712302784
Title:Research on acc/dec algorithms based on energy optimization
Authors:Li, Zhiguo1 ; Li, Pingping1 ; Liu, Jizhan1 ; Li, Wei1
Author affiliation:1 Institute of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Li, Z. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:193-197
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The minimal energy dissipation of ideal velocity profile and the velocity function of general acc/dec algorithms were deduced. Subsequently, according to the relation between the velocity curve and the power dissipation in the motor, the energy dissipation function per step under the S-curve velocity was derived, and its minimum was solved with Matlab. It is a new discovery that the optimal velocity can be gained when t1 of trapezoidal algorithm and quadric spline curve is T/3 and T/6 respectively; t1 and t2 of S-curve algorithm is 0.01T and 0.32T respectively; t1 and t2 of AS-curve algorithm is 0.01T and 0.35T respectively, and R2 is 0.98. At last, the energy dissipation of acc/dec algorithms were calculated under the conditions of different time parameter settings, and were compared with the ideal velocity, more, there were obvious differences in energy dissipations of different algorithms. It is very useful to set the time parameters of acc/dec algorithms and improve the efficient of motor in acc/dec motion control.
Number of references:10
Main heading:Algorithms
Controlled terms: Electron energy loss spectroscopy - Energy dissipation - Energy dissipators - MATLAB - Motion control - Motion planning - Motors - Optimization - Velocity
Uncontrolled terms: Acc/dec algorithm - Energy dissipation function - Energy optimization - Minimal energy - Optimal velocity - Power dissipation - S-curve - Spline curve - Time parameter - Velocity curves - Velocity profile - Velocity profiles
Classification code: 723.4 Artificial Intelligence - 723.5 Computer Applications - 731.3 Specific Variables Control - 731.5 Robotics - 932.2 Nuclear Physics - 801 Chemistry - 921.5 Optimization Techniques - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 921 Mathematics - 723.1.1 Computer Programming Languages - 723 Computer Software, Data Handling and Applications - 431.5 Air Navigation and Traffic Control - 525.4 Energy Losses (industrial and residential) - 616.1 Heat Exchange Equipment and Components - 632.2 Hydraulic Equipment and Machinery - 632.4 Pneumatic Equipment and Machinery - 641.2 Heat Transfer - 705.3 Electric Motors - 714.2 Semiconductor Devices and Integrated Circuits
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
28. Accession number:20093712302746
Title:Particle size distribution of particulate matter emission from the diesel engine burning methanol-diesel fuel and biodiesel
Authors:Wang, Xiaoyan1 ; Li, Fang1 ; Ge, Yunshan2 ; Li, Hongwen1 ; Zhang, Xuemin1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China 2 Laboratory of Auto. Performance and Emission Test, Beijing Institute of Technology, Beijing 100081, China
Corresponding author:Li, H. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:7-12
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The characteristics of particulate matter emission from the diesel engine burning diesel fuel(D), methanol-diesel fuel(M20) and biodiesel fuel(B) were tested respectively by using a two-stage dilution system and electrical low pressure impactor and the effects of the engine speed, load, as well as the different fuels on the particle size distribution were analyzed. The results indicated that the quantity of PM emission for methanol-diesel fuel(M20) and diesel fuels increases with rotation speed, but biodiesel doesn't follow this rule on engine performance curve; the peak of PM emission for biodiesel and diesel fuels decreases with load rising at the speed of 2300 r/min. On rated power mode, the total volume concentration of diesel is more than that of M20 and B. Compared with diesel, the quantity concentration of biodiesel increases by 30.7%, and the quantity concentration of M20 decreases by 62.8% in nuclear mode.
Number of references:15
Main heading:Methanol fuels
Controlled terms: Biodiesel - Diesel engines - Diesel fuels - Engines - Machine design - Methanol - Particle size - Particles (particulate matter) - Particulate emissions - Permanent magnets - Size distribution - Synthetic fuels
Uncontrolled terms: Bio-diesel fuel - Concentration of - Dilution systems - Electrical low-pressure impactor - Emission - Engine performance - Engine speed - Particulate - Particulate matter emissions - PM emissions - Power modes - Rotation speed - Two stage - Volume concentration
Classification code: 654.2 Rocket Engines - 704.1 Electric Components - 708.4 Magnetic Materials - 804 Chemical Products Generally - 951 Materials Science - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids - 943.2 Mechanical Variables Measurements - 922.2 Mathematical Statistics - 617.3 Steam Engines - 612.2 Diesel Engines - 423 Non Mechanical Properties and Tests of Building Materials - 451.1 Air Pollution Sources - 522 Gas Fuels - 523 Liquid Fuels - 524 Solid Fuels - 531.2 Metallography - 601 Mechanical Design - 612 Engines
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
29. Accession number:20093712302777
Title:Recognition and shape features extraction of apples based on machine vision
Authors:Si, Yongsheng1, 2 ; Qiao, Jun3 ; Liu, Gang1 ; Liu, Zhaoxiang1 ; Gao, Rui1
Author affiliation:1 Key Laboratory of MOE on Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China 2 College of Information Science and Technology, Agricultural University of Hebei, Baoding 071001, China 3 Network Centre, China Agricultural University, Beijing 100083, China
Corresponding author:Liu, G. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:161-165 73
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An apple recognition method with color difference R-G and color difference ratio (R-G)/(G-B) was presented. The apples in the images taken under frontlighting and backlighting conditions were recognized. The contour images were gained through the pretreatments such as noise removal, area filling etc. Shape features were extracted from the contour images based on genetic algorithm (GA). For the clustered or overlapped apples, the method of multiple running GA and converting the contour points of every apple into background in turn was applied. The experiment results showed that the proposed recognition method, to a certain extent, eliminated the influence of shade, backlighting and soil. The recognition rate reached 97%. The features extraction method based on GA segmented the clustered or overlapped apples successfully. Meanwhile, the center points and radiuses were quickly and accurately extracted.
Number of references:11
Main heading:Feature extraction
Controlled terms: Colorimetry - Computer vision - Fruits - Genetic algorithms - Image recognition
Uncontrolled terms: Apple - Area filling - Center points - Color difference - Contour image - Contour points - Features extraction - Frontlighting - Machine vision - Noise removal - On-machines - Pre-treatments - Recognition methods - Recognition rates - Shape features
Classification code: 921 Mathematics - 821.4 Agricultural Products - 751.1 Acoustic Waves - 741.2 Vision - 941.4 Optical Variables Measurements - 741.1 Light/Optics - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 731.6 Robot Applications
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
30. Accession number:20093712302772
Title:Study on technology of stabilized storage of wheat germ by on-line microwave processing
Authors:Xu, Bin1 ; Dong, Ying1 ; Wu, Yanbo1
Author affiliation:1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Dong, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
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: Microwave processing technology and equipment were developed to solve the problem of wheat germ's easily acidification and deterioration, aiming at improving the storage stability of wheat germ and better prepare for its further processing. With this developed equipment, microwaves of different power and processing time were selected to test their respective influence on the wheat germ stabilization. The result showed that processed with microwave of 2.8 kW for 4 minutes, wheat germ relative lipase activity is 17.63%, peroxide value is 3.81 mmol/kg, acid value is 14.65 mg/g, VE loss is 5.29%, NSI is 51.10%, moisture content is 3.72%, and no distinct change in its fatty acid composition and relative content. Furthermore, the equipment developed was tested to be collocated with wheat flour product line with the daily capacity of producing 300t. This equipment effectively passivates lipase in wheat germ, preserves various nutrition, and lengthens quality guaranteed time at the cost of lower power.
Number of references:13
Main heading:Microwaves
Controlled terms: Acids - Equipment - Fatty acids - Stabilization - Technology
Uncontrolled terms: Acid value - Fatty acid composition - Lipase activity - Microwave processing - Microwave processing technologies - Moisture contents - On-line - Peroxide value - Processing Time - Product-lines - Quality guaranteed - Storage stability - Technology parameter - Wheat flours - Wheat germ
Classification code: 711 Electromagnetic Waves - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 901 Engineering Profession - 951 Materials Science
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
31. Accession number:20093712302785
Title:Parameter optimization of compressor based on genetic algorithm
Authors:Zhong, Meipeng1, 2 ; Zheng, Shuiying3 ; Pan, Xiaohong1
Author affiliation:1 Institute of Manufacture Engineering, Zhejiang University, Hangzhou 310027, China 2 College of Mechanical and Electrical Engineering, Jiaxing College, Jiaxing 314001, China 3 Institute of Chemical Machinery, Zhejiang University, Hangzhou 310027, China
Corresponding author:Zheng, S. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:198-202
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to improve the efficiency of permanent magnet brushless D. C. motor (BLDCM) driving air compressor, genetic algorithm embed BLDCM module which optimizes the air compressor was put forward. Optimized target of genetic algorithm is the efficiency of BLDCM. Optimized variables are the diameter of low pressure cylinder, the diameter of high pressure cylinder, the journey of low pressure piston, the journey of high pressure piston and the rotate speed of BLDCM. The values of variables were passed to BLDCM module by sim function. Simulation time was controlled by sim function. The efficiency value was passed to genetic algorithm program. Simulated result shows that the efficiency of BLDCM is higher than that before optimized. The experimental result shows that the specific power of air compressor is almost the same as that before optimized at 0.7MPa, but is much less than that before optimized at 2.5MPa. The result also shows that genetic algorithm embed BLDCM module which optimized the air compressor is available and practical.
Number of references:9
Main heading:Compressors
Controlled terms: Cylinders (shapes) - Genetic algorithms - Magnets - Structural optimization
Uncontrolled terms: Air compressor - BLDCM - High pressure - High-pressure cylinders - Low pressures - Low-pressure cylinder - Parameter optimization - Rotate speed - Simulated results - Simulation time - Specific power
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 708.4 Magnetic Materials - 704 Electric Components and Equipment - 618.1 Compressors - 408.2 Structural Members and Shapes
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
32. Accession number:20093712302771
Title:High pressure CO2-water system for inulin hydrolysis to produce fructose
Authors:Luo, Denglin1 ; Yuan, Haili1 ; Zeng, Xiaoyu1 ; Liu, Jianxue1
Author affiliation:1 College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003, China
Corresponding author:Luo, D. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:130-133
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: With the aim to solve the drawback on the traditional fructose production from inulin hydrolysis in acidic aqueous solution, the high pressure CO2-water system for the inulin hydrolysis was studied instead of the traditional acidic aqueous solution. The effects of CO2 pressure, reaction temperature and reaction time on fructose production from inulin hydrolysis were investigated. The results showed that the hydrolysis degree of inulin was positively related with CO2 pressure and reaction time, and increased at first followed by decreasing with reaction temperature rise. Under an optimum reaction condition of CO2 pressure 20 MPa, reaction temperature 70°C and reaction time 3h, the hydrolysis degree of inulin reached 94.9%, which implies that the inulin is efficiently hydrolyzed to produce fructose in the high pressure CO2-water system, and the complicated operations and pollution of the traditional acid hydrolysis process were avoided.
Number of references:7
Main heading:Hydrolysis
Controlled terms: Fructose - Ternary systems - Water piping systems - Waterworks
Uncontrolled terms: Acid hydrolysis - Acidic aqueous solution - High pressure CO - High pressure CO2-water system - Hydrolysis degree - Inulin - Optimum reaction conditions - Reaction temperature - Reaction time - Water system
Classification code: 804.1 Organic Compounds - 802.2 Chemical Reactions - 802.1 Chemical Plants and Equipment - 643.2 Space Heating Equipment and Components - 822.3 Food Products - 619.1 Pipe, Piping and Pipelines - 531.1 Metallurgy - 446.1 Water Supply Systems - 446 Waterworks - 531.2 Metallography
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
33. Accession number:20093712302754
Title:Experiment of pneumatic precision metering device for rapeseed
Authors:Liao, Qingxi1 ; Li, Jibo1 ; Qin, Guoliang1
Author affiliation:1 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Liao, Q. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:44-48
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to define the optimum performance parameters of pneumatic precision metering device for rapeseed, single factor and orthogonal experiments were carried out, with the experimental factors of rotational speed of metering disc, speed of seed belt, pressure and vacuity, employing eligible index, multiple index, miss index, seed damage rate as judging indexes. Single factor experiment showed that the damage rate of seed is zero in every group of experiments, and the other three indexes were remarkably influenced by rotational speed of metering disc, pressure and vacuity. Furthermore, orthogonal experiment indicates that when the pressure is 440Pa, the vacuity is -834Pa and the rotational speed of metering disc is 15r/min, the eligible index reaches as high as 94.2%, both of the multiple index and the miss index are lower than 3.0%.
Number of references:19
Main heading:Experiments
Controlled terms:Pneumatics - Seed - Speed
Uncontrolled terms :Damage rate - Experimental factors - Metering - Multiple index - Optimum performance - Orthogonal experiment - Precision metering - Rapeseed - Rotational speed - Seed damage
Classification code: 632.3 Pneumatics - 821.4 Agricultural Products - 901.3 Engineering Research - 931.1 Mechanics
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
34. Accession number:20093712302787
Title:Relative proportion of serial robot transmission ratios optimization based on manipulability
Authors:Yang, Xin'gang1 ; Huang, Yumei1 ; Yang, Wendong1 ; Shi, Enxiu1
Author affiliation:1 School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author:Yang, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:209-213 218
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Two steps are involved to determine transmission ratios of serial robot, i.e. relative proportion of transmission ratios determination and absolute transmission ratios determination, and the former is stressed from viewpoint of manipulability. Based on analyzing the essence of manipulability index related with condition number, the determination of relative proportion of transmission ratios was formulated as optimization of manipulability related to driving space. An optimization model on the basis of global manipulability related to driving space was given to determinate relative proportion of transmission ratios. A method to obtain Jacobi matrix in the optimization model was proposed with consideration of the difference of power elements' velocity driving capability and end-effecter' pose velocity of job requirement. At last, an optimization process was conducted to determine relative proportion of transmission ratios of a 6-DOF serial robot, and its global manipulability related to driving space was increased.
Number of references:7
Main heading:Light transmission
Controlled terms: Mathematical models - Matrix algebra - Number theory - Optimization - Robots
Uncontrolled terms: Condition number - Condition numbers - Driving capability - Jacobi matrix - Manipulability - Optimization models - Optimization process - Power elements - Serial robots - Transmission ratio - Transmission ratios
Classification code: 731.5 Robotics - 731.6 Robot Applications - 741.1 Light/Optics - 921 Mathematics - 921.1 Algebra - 921.5 Optimization Techniques
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
35.Accession number:20093712302770
Title:Effect of frequency and temperature on microwave dielectric properties of edible vegetable oils
Authors:Guo, Wenchuan1 ; Lu, Junfeng1 ; Gu, Hongchao1
Author affiliation:1 College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author:Guo, W. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:124-129
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The dielectric properties of rap oil, soybean oil, peanut oil, corn oil and well-distributed oil were studied by the open-ended coaxial probe technology over the frequency range from 200 to 4500 MHz and temperature from 20 to 90°C. The reasons why relative dielectric constant and dielectric loss factor changed with frequency and temperature were analyzed. The results indicate that the relative dielectric constant of rap oil was maximal and the dielectric loss factor of which was minimal among five oils at the same frequency. However, the corn oil had minimal relative dielectric constant and maximal dielectric loss factor. The good linear relationships between permittivity and saturated fatty acid and unsaturated fatty acid were found over the frequency from 500 to 4000 MHz. The relative dielectric constant decreased linearly with increasing temperature, but the loss factor increased linearly. The permittivity of rap oil was affected obviously by the temperature, while the influence was very small to corn oil. The penetration depths of electromagnetic energy in edible oils decreased with the increase of frequency and temperature. This study was useful to understand the microwave dielectric properties of vegetable oils and to further study the effect of edible oil quality based on the dielectric property.
Number of references:19
Main heading:Ceramic capacitors
Controlled terms: Acids - Dielectric losses - Dielectric waveguides - Electric insulation testing - Fatty acids - Lubricating oils - Microwaves - Permittivity - Vegetable oils
Uncontrolled terms: Corn oil - Dielectric loss factors - Edible oil - Edible vegetable oil - Electromagnetic energy - Frequency - Frequency ranges - Linear relationships - Loss factor - Microwave dielectric properties - Open-ended coaxial probe - Peanut oil - Penetration depth - Rap oil - Relative dielectric constant - Saturated fatty acid - Soybean oil - Unsaturated fatty acids
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 714.3 Waveguides - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 812.1 Ceramics - 822.3 Food Products - 711 Electromagnetic Waves - 704.1 Electric Components - 701.1 Electricity: Basic Concepts and Phenomena - 701 Electricity and Magnetism - 607.1 Lubricants - 413.1 Electric Insulating Materials - 708.1 Dielectric Materials
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
36. Accession number:20093712302788
Title:Neural network technique on camera calibration based on improved harris corner extraction method
Authors:Cui, An1 ; Yuan, Zhi1 ; Wang, Dan1 ; Zhang, Haipeng1
Author affiliation:1 State Key Laboratory of Automotive Dynamic Simulation, Jilin University, Changchun 130025, China
Corresponding author:Cui, A. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:214-218
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Camera calibration in a binocular stereo vision system was studied based on BP neural network techniques. A neural network was built to investigate the relationship between the image coordinates and the space coordinates. To improve the accuracy of training data, a corner extraction algorithm based on Harris algorithm was modified by increasing constraints. The generation ability of neural networks was discussed, and was further improved by synthesizing many strategies such as the regularization and stopped training strategies. At last, compared with the traditional calibration method, the test result shows that this method is available and can get a higher precision for binocular camera calibration.
Number of references:9
Main heading:Neural networks
Controlled terms:Binoculars - Calibration - Cameras - Stereo vision
Uncontrolled terms: Binocular camera - Binocular stereo vision system - BP neural networks - Camera calibration - Extraction algorithms - Extraction method - Generality - Harris algorithm - Harris corner - Image coordinates - Neural network techniques - Space coordinates - Test results - Traditional calibration - Training data - Training strategy
Classification code: 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 902.2 Codes and Standards - 742.2 Photographic Equipment - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 741.3 Optical Devices and Systems - 731.6 Robot Applications - 723.5 Computer Applications - 723.4 Artificial Intelligence - 461.1 Biomedical Engineering - 741.2 Vision
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
37. Accession number:20093712302769
Title:Optimization of the adsorption property of apple polyphenols on NKA-9 macroporous resin
Authors:Wang, Yuhong1 ; Zhu, Weijun2 ; Pan, Zhili1 ; Li, Jianxin3 ; Zhou, Xianghui1 ; Ai, Zhilu1
Author affiliation:1 College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China 2 Food Science Department, Henan Vocational College of Agriculture, Zhongmou 451450, China 3 College of Chemical Engineering and Food Technology, Zhongzhou University, Zhengzhou 450044, China
Corresponding author:Ai, Z. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:119-123
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to improve extract efficiency of apple polyphenols, the dynamic law of apple polyphenols (AP) adsorption and desorption to NKA-9 macroporous resin was researched to establish a mathematic model. The Response Surface Methodology(RSM) was used to investigate the effects of feeding rate, sample concentration and pH on the adsorption properties of macroporous resin and the effects of flow rate, eluent concentration and elution volume on the desorption properties of macroporous resin for apple polyphenols. The results showed that the optimum adsorption conditions were the feeding rate of 1.10 mL/min, sample concentration of 2.50 mg/mL, pH 4.83. The optimum desorption parameters were the flow rate 0.61 mL/min, eluent concentration 59.48%, elution volume 125.73 mL. In conclusion, the NKA-9 macroporous resin can be used as the best material to extract the apple polyphenols.
Number of references:12
Main heading:pH effects
Controlled terms: Adsorption - Concentration (process) - Desorption - Extraction - Feeding - Flow rate - Fruits - Optimization - Phenols - Resins
Uncontrolled terms: Adsorption properties - Apple polyphenols - Desorption properties - Dynamic adsorption - Elution volumes - Feeding rate - Macroporous resin - Mathematic model - Polyphenols - Processing parameters - Response Surface Methodology - Sample concentration
Classification code: 943.2 Mechanical Variables Measurements - 921.5 Optimization Techniques - 821.4 Agricultural Products - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 802.3 Chemical Operations - 801.1 Chemistry, General - 691.2 Materials Handling Methods - 631 Fluid Flow
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
38. Accession number:20093712302767
Title:Parameters optimization and properties for lactobacillus helveticus by heat-shock treatment
Authors:Sui, Xin1, 2 ; Ren, Fazheng1 ; Lu, Yanwen3 ; Chen, Lijun2
Author affiliation:1 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China 2 Technology Centre, Beijing Sanyuan Foods Co. Ltd., Beijing 100085, China 3 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Chen, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:111-114 79
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 effects of different heat-shock treatments on biochemical properties and microstructure of Lactobacillus helveticus were determined. The strain was subjected to heat-shock treatment at 67°C and 70°C, holding time was 10s, 15s and 20s, respectively. The biochemical properties related to cheese ripening such as cell residual viability, lactic acid productivity, and proteolysis activity were monitored. The results suggested that the modified cells using heat-shock parameter of 10s at 70°C, gave the best results upon inhibiting lactic acid productivity and the remaining proteolysis activity. Moreover, SEM photographs showed the changes of surface structure on cell membranes, and elucidated the relationship with heat-shock treatment.
Number of references: 16
Main heading: Cell membranes
Controlled terms: Body fluids - Cytology - Lactic acid - Microstructure - Optimization - Organic acids - Photography - Productivity - Surface structureUncontrolled terms:Biochemical properties - Cell residual - Cheese ripening - Heat-shock - Heat-shock treatment - Holding time - Lactobacillus helveticus - Parameters optimization - Properties - SEM
Classification code: 951 Materials Science - 804.1 Organic Compounds - 822.3 Food Products - 913.1 Production Engineering - 921.5 Optimization Techniques - 931.2 Physical Properties of Gases, Liquids and Solids - 933 Solid State Physics - 801.4 Physical Chemistry - 746 Imaging Techniques - 742.1 Photography - 531.2 Metallography - 461.9 Biology - 461.2 Biological Materials and Tissue Engineering - 801.2 Biochemistry
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
39. Accession number:20093712302763
Title:Numerical simulation of unsteady flow in a centrifugal pump
Authors:Tian, Hui1 ; Guo, Tao1 ; Sun, Xiuling1 ; Li, Guojun1
Author affiliation:1 School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Corresponding author:Li, G. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:92-95
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: Pressure boundary condition was used to investigate the unsteady 3-D flow characteristics in a single-stage single-suction centrifugal pump with vaneless volute. For the calculation, the total pressure and the static pressure were specified for inlet and outlet respectively, and the sliding mesh technique was used. The results show the capability of this numerical method in capturing the unsteady flow characteristics due to the impeller-volute interaction. The flow is characterized by periodic pulsation, blade passing frequency in volute and impeller rotating frequency in impeller. To a large extent, the asymmetric shape of the volute affects the propagation of impeller-volute interaction and results in the circumferential non-uniformity flow distribution in the pump.
Number of references:7
Main heading:Pumps
Controlled terms: Aerodynamics - Boundary conditions - Centrifugal pumps - Computer simulation languages - Flow simulation - Fluid dynamics - Hydraulic machinery - Mathematical models - Pumping plants - Three dimensional - Unsteady flow
Uncontrolled terms: Blade passing frequency - Flow characteristic - Flow distribution - Nonuniformity - Numerical simulation - Periodic pulsation - Pressure boundary condition - Pressure boundary conditions - Rotating frequencies - Single stage - Sliding mesh technique - Static pressure - Total pressure - Unsteady
Classification code: 931.1 Mechanics - 921 Mathematics - 902.1 Engineering Graphics - 723.5 Computer Applications - 723.1.1 Computer Programming Languages - 651.1 Aerodynamics, General - 632.2 Hydraulic Equipment and Machinery - 631.1 Fluid Flow, General - 618.2 Pumps - 446 Waterworks - 402.1 Industrial and Agricultural Buildings
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
40. Accession number:20093712302789
Title:Orthogonal optimum design of the actuator for the piezoelectric pump based on finite element simulation
Authors:He, Xiuhua1 ; Zhang, Rui1 ; Deng, Xulian1 ; Jiang, Quanying1
Author affiliation:1 College of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:He, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:219-222 226
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: As a driver of piezoelectric pump, the vibration performance of piezoelectric actuator influences the performance of piezoelectric pump. There are a number of factors which influence the vibration performance of piezoelectric actuator. Therefore, in order to improve the vibration performance of piezoelectric actuator, it is essential to optimize the structural parameters and materials. Based on the finite element simulation analysis method, an orthogonal scheme of four factors and three levels was designed. Through the range analysis for the result, the influencing order of each influencing factor on two important indexes that are the oscillation amplitude and resonance frequency of piezoelectric actuator were acquired. Simultaneously, the superior schemes were obtained. Because the superior schemes were not in the original design schemes, additional designs were made and contrasted. Finally, the optimal scheme was obtained.
Number of references:8
Main heading:Piezoelectric actuators
Controlled terms: Cantilever beams - Design - Finite element method - Optimization - Piezoelectric transducers - Piezoelectricity - Pumps - Resonance - Vibration analysis
Uncontrolled terms: Finite element simulations - Influencing factor - Optimal scheme - Optimization design - Optimum designs - Original design - Orthogonal design - Oscillation amplitude - Piezoelectric pump - Range analysis - Resonance frequencies - Structural parameter
Classification code:732 Control Devices - 751.1 Acoustic Waves - 751.2 Acoustic Properties of Materials - 752.1 Acoustic Devices - 902.1 Engineering Graphics - 921.5 Optimization Techniques - 921.6 Numerical Methods - 931.1 Mechanics - 943.2 Mechanical Variables Measurements - 715 Electronic Equipment, General Purpose and Industrial - 408 Structural Design - 408.2 Structural Members and Shapes - 618.2 Pumps - 701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 704 Electric Components and Equipment - 704.1 Electric Components - 708 Electric and Magnetic Materials - 708.1 Dielectric Materials
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
41. Accession number:20093712302773
Title:Study on antioxidant activity in vitro of onion flavonoids
Authors:Zhang, Qiang1 ; Wang, Songhua1 ; Sun, Yujun1 ; Jiang, Shengjuan1 ; Song, Yu1
Author affiliation:1 Life Science College, Anhui Science and Technology University, Fengyang 233100, China
Corresponding author:Zhang, Q. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:139-142
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 antioxidant activity in vitro of onion flavonoids was investigated by measuring its scavenging activity on DPPH, nitrite, its chelating activity on Fe2 , its inhibitory effect on peroxidation of yolk lipoprotein and oil. The results show that onion flavonoids posses strong chelating activity, good DPPH radical scavenging activity and nitrite scavenging activity, significant inhibitory effect on peroxidation of yolk lipoprotein and oil, namely onion flavonoids have good antioxidant activity in vitro.
Number of references:13
Main heading:Experiments
Controlled terms:Chelation - Oxidation
Uncontrolled terms:Antioxidant activities - Antioxidant activity - Chelating activity - Flavonoids - In-vitro - Inhibitory effect - Onion - Peroxidation - Radical scavenging activity - Scavenging activities
Classification code:802.2 Chemical Reactions - 901.3 Engineering Research
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
42. Accession number:20093712302775
Title:Automatic control system of tractors platooning
Authors:Zhu, Zhongxiang1 ; Song, Zhenghe1 ; Xie, Bin1 ; Chen, Jun2 ; Takeda, Junichi3 ; Mao, Enrong1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China 2 College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China 3 Faculty of Agriculture, Iwate University, Morioka 0208550, Japan
Corresponding author:Song, Z. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:149-154
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to increase the work efficiency, an automatic control system of tractors platooning was developed. A tractors platooning model was established and a platooning control method was designed. Firstly, a reference route for the following tractor was dynamically created from the position points of the leading tractor, and subsequently processed by the least squares fitting method to filter out some noise. Secondly, a feedback path-tracking controller was designed to guide the following tractor along the reference route. Field tests were conducted on a flat meadow. The results indicated that the following tractor followed up the leading one successfully with the mean and RMS lateral deviations of less than 0.015 m and 0.079 m, respectively.
Number of references:18
Main heading:Controllers
Controlled terms: Automation - Control - Feedback - Process control - Tractors (agricultural) - Tractors (truck)
Uncontrolled terms: Automatic control - Optimal control - Path creation - Path-tracking controller - Tractors platooningClassification code:663.1 Heavy Duty Motor Vehicles - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 732 Control Devices - 732.1 Control Equipment - 821.1 Agricultural Machinery and Equipment
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
43.Accession number:20093712302752
Title:Finite element analysis and structural design of vehicle diesel engine block
Authors:Liu, Yun1 ; Hu, Yuping2 ; Li, Guoxiang2
Author affiliation:1 College of Mechanical and Electrical Engineering, Weifang University, Weifang 261061, China 2 School of Energy and Power Engineering, Shandong University, Ji'nan 250061, China
Corresponding author:Hu, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:36-39 17
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: 3-D finite element models and meshes of the cylinder in a certain vehicle diesel engine were established. With the combination of finite element analysis and submodel technology, ABAQUS software was used to carry out finite element strength analysis on engine block. Then the stress concentration position was determined and structural improvement of cylinder block was proposed. Based on this, MSC. Fatigue software was adopted to calculate fatigue strength of the water jacket basement submodel before and after modification, and stress test was done to validate the effect. The experiment results indicated that the stress of water jacket basement reduces from 11% to 46% after adding stiffening rib to the cylinder.
Number of references:5
Main heading:Finite element method
Controlled terms: Automobile engines - Buildings - Computer software - Cylinders (shapes) - Diesel engines - Engine cylinders - Engines - Fatigue testing - Reconstruction (structural) - Stress concentration - Structural analysis - Three dimensional
Uncontrolled terms:3D finite element model - ABAQUS software - Before and after - Block - Cylinder block - Diesel engine blocks - Engine blocks - Fatigue strength - Finite Element - Finite element analysis - Stiffening ribs - Strength analysis - Stress test - Structural improvements - Submodels
Classification code:617.3 Steam Engines - 654.2 Rocket Engines - 661.1 Automotive Engines - 612.2 Diesel Engines - 723 Computer Software, Data Handling and Applications - 902.1 Engineering Graphics - 921.6 Numerical Methods - 723.5 Computer Applications - 612.1.1 Internal Combustion Engine Components - 405.2 Construction Methods - 408.1 Structural Design, General - 408.2 Structural Members and Shapes - 402 Buildings and Towers - 421 Strength of Building Materials; Mechanical Properties - 422.2 Test Methods - 612 Engines - 422 Strength of Building Materials; Test Equipment and Methods
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
44. Accession number:20093712302749
Title:Experiment on the premixed laminar flames of coal bed methane-air mixtures
Authors:Zheng, Bin1 ; Liu, Yongqi1 ; Li, Ping1 ; Liu, Ruixiang1 ; Gao, Zhenqiang1
Author affiliation:1 College of Traffic and Vehicle Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author:Zheng, B. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:23-26 35
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The effects of bomb under equivalence ratios, initial pressures and CH4 concentrations on the premixed laminar flames propagation velocity and the laminar burning velocity of coal bed methane-air mixtures were studied in a constant volume combustion bomb by high speed video camera. The results showed as follows, when equivalence ratio is 1.1, laminar burning velocity has the largest value; in initial combustion stage, with the increase of initial pressure, maximum combustion pressure markedly increases, laminar flame spread velocity and laminar burning velocity decrease, and when the flame radius exceeds 40 mm, laminar flame spread velocity and laminar burning velocity increase; with the increase of CH4 concentration, laminar burning velocity and maximum combustion pressure increase.
Number of references:9
Main heading:Coal combustion
Controlled terms: Bombs (ordnance) - Coal - Coal deposits - Coal industry - Flammability - Methane - Smoke - Thermochemistry - Velocity - Video cameras
Uncontrolled terms: Coal bed methane - Combustion pressure - Combustion stage - Constant volume combustion bomb - Equivalence ratios - Flame radius - High speed video cameras - Initial pressure - Laminar burning velocity - Laminar flame - Premixed laminar flame - Premixed laminar flames - Propagation velocities
Classification code: 742.2 Photographic Equipment - 801.3 Colloid Chemistry - 801.4 Physical Chemistry - 804 Chemical Products Generally - 804.1 Organic Compounds - 911 Cost and Value Engineering; Industrial Economics - 913 Production Planning and Control; Manufacturing - 914.2 Fires and Fire Protection - 931.1 Mechanics - 716.4 Television Systems and Equipment - 404 Civil Defense and Military Engineering - 451.1 Air Pollution Sources - 482 Mineralogy - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 521.4 Flame Research - 522 Gas Fuels - 524 Solid Fuels - 641.1 Thermodynamics
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
45. Accession number:20093712302747
Title:Investigation of effect of cam phase on combustion and exhaust characteristics of CNG engine
Authors:Jiao, Yunjing1 ; Zhang, Huiming1 ; Yang, Zhiyong2 ; Zhang, Zili2 ; Si, Pengkun1 ; Cheng, Hui2
Author affiliation:1 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China 2 Dongfeng Nanchong Automobile Co. Ltd., Nanchong 637000, China
Corresponding author:Jiao, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:13-17
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Two cam phases were designed basing on original diesel engine which was refitted into spark ignition CNG engine. The influence of cam phase on combustion and exhaust was studied by experiment on indoor test. The conclusions are showed as follows. With the smaller valve overlap, the exhaust of HC and NOx reduces; but too small valve overlap at high speed is adverse to the exhaust of HC. The density of burning mixture reduces with smaller overlap and the growth of NOx is restricted. On the other hand, power of the engine also reduces. So, both the power and the exhaust should be considered at the same time. The crank angle of ignition advance should increase properly at high speed, in order to keep the power and avoid the post combustion and reduce the temperature of exhaust.
Number of references:6
Main heading:Gas engines
Controlled terms Cams - Diesel engines - Engines - Ignition - Smoke - Thermochemistry
Uncontrolled terms: CNG engine - Crank angle - Exhaust - Ignition advance - Indoor test - Nature gas engine - Post-combustion - Spark ignition
Classification code: 801.4 Physical Chemistry - 801.3 Colloid Chemistry - 654.2 Rocket Engines - 641.1 Thermodynamics - 617.3 Steam Engines - 804 Chemical Products Generally - 612.3 Gas Turbines and Engines - 612 Engines - 601.3 Mechanisms - 521.1 Fuel Combustion - 451.1 Air Pollution Sources - 612.2 Diesel Engines
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
46. Accession number:20093712302761
Title:Inverse method estimating root water uptake model parameters using hybrid genetic algorithms
Authors:Guo, Xianghong1 ; Sun, Xihuan1 ; Ma, Juanjuan1
Author affiliation:1 College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Corresponding author:Sun, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:40
Issue:8
Issue date:August 2009
Publication year:2009
Pages:80-85
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: The hybrid genetic algorithm combined with Levenberg-Marquardt optimization algorithm was established to estimate root water uptake model parameters. A series of numerical experiments and root water uptake were conducted to verify the model. The results indicated that the optimized value of the root water uptake model parameter optimized model with the hybrid genetic algorithm has a higher precision. The time and space interval of soil water content had a great influence on the root water uptake model parameter's optimized precision. In practice, it is recommended to choose 5-10 d for time interval and 5-10 cm for space interval. Furthermore, the inverse method was applied to simulate the average root water uptake rate distributions of cotton. The simulated results showed that the optimized model solving the root water uptake model can simulate the root water uptake of cotton, to solve the root water uptake parameter.
Number of references:17
Main heading:Water content
Controlled terms: Cotton - Genetic algorithms - Geologic models - Inverse problems - Soil moisture - Structural optimization - Underwater soils
Uncontrolled terms: Hybrid genetic algorithms - Inverse methods - Levenberg-Marquardt algorithm - Levenberg-Marquardt optimization - Model parameters - Numerical experiments - Parameter optimization - Root water uptake model - Root-water uptake - Simulated results - Soil water content - Time and space - Time interval
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 821.4 Agricultural Products - 819.1 Natural Fibers - 723 Computer Software, Data Handling and Applications - 483.1 Soils and Soil Mechanics - 481.1 Geology - 471.1 Oceanography, General - 444 Water Resources
Database:Compendex
Compilation and indexing terms, ? 2009 Elsevier Inc.
? 2009 Elsevier Inc. All rights reserved.
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