|
2010年第41卷第8期共收录45篇
1. Accession number: 20103513195402
Title: Experiment on threshing and cleaning in two-stage harvesting for rapeseed
Authors: Wu, Chongyou1, 2 ; Ding, Weimin1 ; Zhang, Min2 ; Shi, Lei2 ; Lu, Yan2 ; Yu, Shanshan2
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
2 Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author: Ding, W. (wmding@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 72-76
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Specific properties and working parameters of threshing and cleaning in two-stage harvesting for rapeseed in south China were explored. The optimal type of threshing and cleaning units, and two component reasonable working parameters were reached by orthogonal experiments of threshing and cleaning, which also offered reference for designing and using the rapeseed pickup-combine. Test results indicated: optimal parameter group of threshing separate smuggle loss rate were feed quantity, 1.6kg/s; roller rotating speed, 750r/min; threshing interval, 15mm; and 6-pole spike-tooth cylinder. Primary and secondary factors of threshing separate smuggle loss rate were cylinder type, feed quantity, threshing interval and roller rotating speed. The optimal parametric group of least cleaning loss rate and least impurity rate were scale sieve with opening 10mm; vibration sieve crank rotating speed, 260r/min; centrifugal blower rotating speed, 860r/min; centrifugal blower tilt angle, 15°. Primary and secondary factors by fuzzy analysis of synthesize evaluation were centrifugal blower tilt angle, vibration sieve crank rotating speed, vibration sieve type and centrifugal blower rotating.
Number of references: 10
Main heading: Vibration analysis
Controlled terms: Blowers - Centrifugation - Cleaning - Cylinders (shapes) - Experiments - Harvesting - Optimization - Rollers (machine components) - Rotating machinery - Rotation - Sieves - Speed
Uncontrolled terms: Centrifugal blower - Fuzzy analysis - Loss rates - Optimal parameter - Orthogonal experiment - Rapeseed - Rotating speed - South China - Test results - Threshing - Tilt angle - Two stage - Two-component - Working parameters
Classification code: 943.2 Mechanical Variables Measurements - 931.1 Mechanics - 921.5 Optimization Techniques - 901.3 Engineering Research - 821.3 Agricultural Methods - 802.3 Chemical Operations - 618.3 Blowers and Fans - 605 Small Tools and Hardware - 601.2 Machine Components - 601.1 Mechanical Devices - 408.2 Structural Members and Shapes
DOI: 10.3969/j.issn.1000-1298.2010.08.016
Database: Compendex 2. Accession number: 20103513195421
Title: Experiment of dual-plates differential impact-based grain flow sensor
Authors: Chen, Shuren1 ; Yang, Hongbo1 ; Li, Yaoming1 ; Hu, Junwan2 ; Zhang, Linlin1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjian 212013, China
2 School of Electronic and Information Engineering, Jiaying University, Meizhou 514015, China
Corresponding author: Chen, S. (srchen@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 171-174
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 dual-plates differential impact-based grain flow sensor of yield monitor systems was designed. The static force characteristics of sensor were experimental tested. Results indicated that the output signal of the grain flow sensor had nothing to do with the location of the point of application of the external force, and the linearity of the sensor could meet the application requirements. During the range of grain flow was 0-2kg/s, characteristic of the flow sensor was tested through laboratory and field. The sensor output voltage signal of the coefficient was gotten. Calibration coefficient K was determined through test. The error of grain flow sensor was 3.8% for rice harvester.
Number of references: 12
Main heading: Sensors
Controlled terms: Grain (agricultural product)
Uncontrolled terms: Field test - Flow-sensors - Grain - Impact-based - Static forces
Classification code: 801 Chemistry - 821.4 Agricultural Products
DOI: 10.3969/j.issn.1000-1298.2010.08.035
Database: Compendex 3. Accession number: 20103513195410
Title: Radio frequency technology and its application in agro-product and food processing
Authors: Liu, Yanhong1 ; Yang, Baoling1 ; Mao, Zhihuai1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Mao, Z. (maozhh@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 115-120
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: Radio frequency (RF) technology was introduced. Application prospect of RF in China was proposed. RF heating technology have advantages of selective heating effect, moisture leveling effect and high energy penetration depth, and widely used in agro-product drying, insect control, sterilization and heat treatment of porous food materials.
Number of references: 42
Main heading: Insect control
Controlled terms: Drying - Food processing - Heating - Radio - Radio waves
Uncontrolled terms: Agro-product - Application prospect - Food materials - High energy - Penetration depth - Radio frequencies - Radio frequency - Radiofrequency technology - RF heating - Selective heating - Sterilization
Classification code: 642.1 Process Heating - 643.1 Space Heating - 716.3 Radio Systems and Equipment - 804.1 Organic Compounds - 822.2 Food Processing Operations
DOI: 10.3969/j.issn.1000-1298.2010.08.024
Database: Compendex 4. Accession number: 20103513195414
Title: Forced-air precooling conditions of eggs
Authors: Liu, Meiyu1 ; Cui, Jianyun3 ; Ren, Fazheng2 ; Li, Jian2 ; Lian, Haiping3
Author affiliation: 1 Department of Food Science, Hebei University of Engineering, Handan 056021, China
2 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
3 Handan Bureau of Agriculture and Animal Husbandry, Handan 056001, China
Corresponding author: Ren, F. (Renfazheng@263.net)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 135-139
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: Forced-air precooling to the egg fresh keeping and storage was applied, and the effect of cold air temperature, ventilation velocity, and the egg weight in the precooling process was investigated. The results showed that the lower the cold air temperature was, the quicker the precooling velocity would be. The appropriate precooling temperature was 0°C. Also, the precooling velocity increased as the ventilation velocity increased in certain extent. A high precooling efficiency could be achieved when the ventilation velocity was 1. 67m/s. The precooling velocity reduced when the egg was bigger. So the eggs should be divided by the weight first, and then precooled according to the levels to keep the consistent precooling velocity. The best effective precooling period was within 60 min.
Number of references: 17
Main heading: Cooling
Controlled terms: Atmospheric temperature - Velocity - Ventilation
Uncontrolled terms: Cold air - Egg - Forced-air - Forced-air precooling - Fresh keeping - Precooling - Precooling process - Ventilation velocity
Classification code: 443.1 Atmospheric Properties - 641.2 Heat Transfer - 643.5 Ventilation - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.08.028 5. Accession number: 20103513195411
Title: Experiment analysis on three-point bending breaking force of brown rice
Authors: Li, Yinian1 ; Xu, Xiaoqin1 ; Ding, Weimin1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Ding, W. (wmding@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 121-124 130
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: Three-point bending breaking force for ventral and dorsal side of brown rice was measured individually. Average kernel breaking force (the force required to break a brown rice kernel in three-point bending) between ventral side and dorsal side were different, and kernel-to-kernel breaking force distributions were also quite different. The breaking force distribution for ventral side tended to be multi-peak, but that for dorsal side tended to be single-peak. The bending breaking strength and elastics modulus for ventral side were more than those for dorsal side, but the fracture energy for ventral side was less than that for dorsal side. On the other hand, the rice processing quality indexes were correlated to the mechanical properties of rice.
Number of references: 11
Main heading: Mechanical properties
Controlled terms: Bending strength - Grain (agricultural product)
Uncontrolled terms: Breaking force - Breaking force distributions - Breaking strength - Brown rice - Dorsal side - Experiment analysis - Processing quality - Three point bending - Ventral side
Classification code: 421 Strength of Building Materials; Mechanical Properties - 821.4 Agricultural Products - 951 Materials Science
DOI: 10.3969/j.issn.1000-1298.2010.08.025
Database: Compendex
6. Accession number: 20103513195431
Title: Healing method of CAD geometric model for automobile panels
Authors: Di, Chi1 ; Tian, Yuanyuan1 ; Zheng, Guojun2 ; Guo, Wei2
Author affiliation: 1 College of Mechanical Engineering, Northeast Dianli University, Jilin 132012, China
2 College of Materials Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author: Guo, W. (guowei@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 223-226
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Repairing of panel CAD geometric model is an important pre-processing step of the finite element analysis, and widely used in the computer-aided geometric design field. This paper focused on the surface healing method of panel CAD model, which was proposed and analyzed by NURBS technology. Firstly, matching-curves border was determined fast through the pipeline method, the surfaces were stitched by the matching-curves method with characteristics. On the basis of the algorithm, a surface stitching program module was developed. The validity of algorithm was verified by healing automobile front fender parts.
Number of references: 8
Main heading: Finite element method
Controlled terms: Automobile parts and equipment - Computer aided analysis - Computer aided design - Geometry - Pipelines
Uncontrolled terms: Automobile panels - CAD models - Computer-aided geometric design - Finite element analysis - Front fender - Geometric models - Method of panels - Pre-processing step - Program module
Classification code: 619.1 Pipe, Piping and Pipelines - 663.2 Heavy Duty Motor Vehicle Components - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods
DOI: 10.3969/j.issn.1000-1298.2010.08.045
Database: Compendex 7. Accession number: 20103513195407
Title: Traceability platform design of production monitoring and products quality for broilers industry technology system
Authors: Chen, Changxi1, 2 ; Zhang, Hongfu1 ; Feixie, Jingwei2
Author affiliation: 1 Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
2 Department of Computer Science and Information Engineering, Tianjin Agricultural University, Tianjin 300384, China
Corresponding author: Zhang, H. (zhanghf6565@vip.sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 100-106
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to enhance public trust of livestock and poultry products, traceability platform of production monitoring and products quality for broilers industry technology system was developed. It covered standard systems of broilers production, slaughter and processing, gave benefit consideration to enterprises, governments and consumers tripartite. It possessed of third-party authentication. The traceability platform included chicken production subsystem, broilers production subsystem, broilers slaughter and processing subsystems, broilers storage and transportation subsystem, broilers sales subsystem, the third-party administration subsystem and the inspection and quarantine subsystem and a site system for every subsystem login, consumer inquiries and information releasing of system administration. The design of project was built on SSH by using architecture of Java EE, and followed the MVC design pattern. Java and Action Script 3.0 language was used in design and implementation of platform, Flex technology was also adopted to implement real-time video communication. SQL Server 2005 was used as database, Apache Tomcat 6.0 was used as Web server. The platform realized the traceability of all broilers-related information, from the production, slaughter, processing, cold chain storage, and transport to sales. The traceability platform, from the operational level, ensured the safety of chicken products.
Number of references: 21
Main heading: Design
Controlled terms: Agriculture - Health - Java programming language
Uncontrolled terms: Broilers - Cold chain - Design Patterns - Food safety - Operational level - Platform design - Poultry products - Production monitoring - Products quality - Public trust - Real-time video communication - SQL Server 2005 - Standard system - System administration - System design - Technology system - Traceability systems - Web servers
Classification code: 408 Structural Design - 723.1.1 Computer Programming Languages - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.3 Industrial Hygiene
DOI: 10.3969/j.issn.1000-1298.2010.08.021
Database: Compendex 8. Accession number: 20103513195422
Title: Design of intelligent grain cleaning losses monitor based on array piezocrystals
Authors: Ni, Jun1 ; Mao, Hanping1 ; Li, Pingping1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Mao, H. (maohp@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 175-177
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 array piezocrystals sensor and the conditioning circuit of array signal were designed. The software and hardware of monitoring system were completed based on the single chip microcomputer, and the instrument of monitoring grain cleaning loss was realized. Experimental data showed that the response time of the intelligent monitor for grain was less than 1s, and the measurement errors were less than 5%. The system effectively cancelled all kinds of interference during harvesting, and could monitor grain cleaning loss on line with high accuracy.
Number of references: 8
Main heading: Cleaning
Controlled terms: Design - Harvesters - Measurement errors - Monitoring - Voltage measurement
Uncontrolled terms: Array signals - Combine harvester - Conditioning circuit - Experimental data - Monitoring system - Online monitoring - Piezocrystals array - Response time - Single chip microcomputers
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942.2 Electric Variables Measurements - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922 Statistical Methods - 821.1 Agricultural Machinery and Equipment - 802.3 Chemical Operations - 408 Structural Design
DOI: 10.3969/j.issn.1000-1298.2010.08.036
Database: Compendex 9. Accession number: 20103513195396
Title: Effect of situ-vibration spacing scarifying technique to Leymus chinensis grassland
Authors: Feng, Yufeng1 ; Liu, Honglai1 ; Lü, Jinying1 ; Dong, Xiangqian2 ; Song, Jiannong2 ; Wang, Kun1
Author affiliation: 1 College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
2 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Wang, K. (wangkun@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 43-47 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: Based on zone tillage theory, a paired-site design was adopted to qualitatively and quantitatively evaluate the effect of situ-vibration tillage on Leymus chinensis grassland, which would be applied to provide theoretical reference and technical support for restoring degraded Leymus chinensis grassland. Results showed that the soil bulk density decreased, soil water holding capacity and water content increased and the content of soil nutrient increase to some extent after the grassland scarified; the height, cover, density of grass vegetation, above- and below-ground yield, proportion of excellent and good forges and grassland plant diversity all increased, the yearly average economic benefit from the grassland soil scarifying was 155 RMB/hm2 in next 3 year.
Number of references: 19
Main heading: Agriculture
Controlled terms: Agricultural machinery - Soil moisture - Underwater soils - Vegetation - Water content
Uncontrolled terms: Economic benefits - Leymus chinensis - Plant diversity - Situ-vibration zone tillage - Soil properties
Classification code: 444 Water Resources - 483.1 Soils and Soil Mechanics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment
DOI: 10.3969/j.issn.1000-1298.2010.08.010
Database: Compendex 10. Accession number: 20103513195395
Title: Dropping process of rice seed metering device with hole
Authors: Wang, Chong1 ; Song, Jiannong1 ; Wang, Jicheng1 ; Liu, Cailing1 ; Wu, Guangwei1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Song, J. (songjn@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 39-42 71
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In the factory rice cell seedling, dropping process of rice seed metering device affects the seeding performance. To meet the requirement of the rice seed metering device, rice seed movement discipline and mechanism in the dropping process were analyzed theoretically. Dropping process was divided three parts: timely dropping process, delayed dropping process, and enforcement dropping process. The relationship between cell tray velocity and the parameters of seed metering device was derived. Dropping process was analyzed based on high-speed photography technology. Analysis of dropping process provided a basis for the establishment of seed metering device design theory and optimal design. The relationship between the type hole length and the parameters of seed metering device was established. Analysis showed that rational parameters of metering device could ensure seed won't have wall-type collision with the other side.
Number of references: 6
Main heading: Seed
Controlled terms: Agricultural machinery - High speed photography
Uncontrolled terms: Analysis - Dropping process - Metering devices - Optimal design - Rice - Rice cells - Rice seed - Seed metering devices
Classification code: 742.1 Photography - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products
DOI: 10.3969/j.issn.1000-1298.2010.08.009
Database: Compendex 11. Accession number: 20103513195409
Title: Discrimination of snow lotus from different geographical origins by near infrared spectroscopy
Authors: Zhao, Jiewen1 ; Jiang, Pei1 ; Chen, Quansheng1
Author affiliation: 1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Zhao, J. (zhao_jiewen@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 111-114
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: Snow lotus samples from four different geographical origins (Qinghai, Tibet, Yunnan and Sinkiang) were studied. K-nearest neighbors (KNN) algorithm was applied to build discriminating model as a pattern recognition method. The parameter K of the KNN model and the number of principal component factors (PCs) were optimized. The spectra were preprocessed by four different spectral preprocessing methods of standard normal variate (SNV), multiplieative scatter correction(MSC), first derivative and second derivative, and their effects on results of KNN models were compared. Experimental results showed that the optimal model was obtained with PCs 5 and K=3 after SNV spectral preprocessing, and the discriminating rates were all 100% in cross-validation and prediction. The work demonstrated that NIR spectroscopy technique with KNN method could be successfully applied to discriminate snow lotus from different geographical origins.
Number of references: 10
Main heading: Snow
Controlled terms: Infrared devices - Near infrared spectroscopy - Optimization - Pattern recognition - Principal component analysis
Uncontrolled terms: Cross validation - First derivative - Geographical origins - K-nearest neighbors - Near Infrared - NIR spectroscopy - Optimal model - Pattern recognition method - Principal Components - Scatter correction - Second derivatives - Spectral preprocessing - Standard normal variates
Classification code: 443.3 Precipitation - 716 Telecommunication; Radar, Radio and Television - 741.3 Optical Devices and Systems - 921.5 Optimization Techniques - 922.2 Mathematical Statistics
DOI: 10.3969/j.issn.1000-1298.2010.08.023
Database: Compendex 12. Accession number: 20103513195405
Title: Effects of preheating fuel gas to micro-scale flame
Authors: Zhou, Junhu1 ; Wang, Yang1 ; Yang, Weijuan1 ; Liu, Jianzhong1 ; Wang, Zhihua1 ; Cen, Kefa1
Author affiliation: 1 State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Corresponding author: Zhou, J. (enejhzhou@public.zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 90-93 106
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The effect of preheating was investigated in a straight-tube shape micro combustor. Performances of combustor were compared under conditions with different preheating temperature. The flow rates of the fuel feed amount were 0.12, 0.24, 0.36L/min, respectively. The preheating temperatures were environmental temperature (23°C), 250°C, 500°C, respectively. Experimental results showed that with environmental temperature and 0.12L/min, the stability limit was 0.339-3.639. While the preheating temperature increased to 250°C, the stability limit extended to 0.317-4.304. At the preheating temperature of 500°C, the stability limit was 0.453-1.706. The temperature distribution on the combustor wall was measured, which was combined with numeric simulation to investigate the combustion process in the combustor. Simulation results indicated that the peak temperature in the reaction region increased with preheating temperature. At 0.24L/min and stoichiometry, while the preheating temperature increased from environmental temperature to 500°C, the peak temperature increased from 1890 to 2013K. It proved that the proper preheating could increase the reaction temperature, thus inhibited thermal extinction.
Number of references: 28
Main heading: Preheating
Controlled terms: Combustion - Combustors - Mathematical models - Stoichiometry
Uncontrolled terms: Combustion pro-cess - Environmental temperature - Fuel gas - Micro combustion - Micro combustor - Micro-scales - Numeric simulation - Peak temperatures - Performances analysis - Preheating temperature - Reaction temperature - Simulation result - Stability limit - Tube shape
Classification code: 521.1 Fuel Combustion - 521.2 Combustors - 538.2 Welding - 801.4 Physical Chemistry - 921 Mathematics
DOI: 10.3969/j.issn.1000-1298.2010.08.019
Database: Compendex
13. Accession number: 20103513195419
Title: Cotton recognition based on randomized Hough transform
Authors: Liu, Kun1, 2 ; Fei, Shumin1 ; Wang, Mulan2 ; Xing, Canhua2 ; Wang, Zhuqing2
Author affiliation: 1 School of Automation, Southeast University, Nanjing 210013, China
2 College of Automation, Nanjing Institute of Technology, Nanjing 211112, China
Corresponding author: Liu, K. (kunliunj@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 160-165
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 cotton recognition method was proposed based on Hough transform in order to recognize the hidden cotton. For reducing the computation complexity, first of all, the image was segmented by R-B channel in RGB color model. The minimum external rectangle was obtained by labeling its region. Then, according to the contour information from the boundary trace, the randomized Hough transform was realized. The experimental results showed that the proposed recognition method presented good performance even the cotton contour loss rated up to 50%. It met the requirements of the precision and rating for the cotton-harvesting-robot.
Number of references: 18
Main heading: Mathematical transformations
Controlled terms: Cotton - Hough transforms
Uncontrolled terms: Boundary trace - Computation complexity - Contour information - Randomized Hough transform - Recognition - Recognition methods - Region label - RGB Color Model
Classification code: 819.1 Natural Fibers - 921.3 Mathematical Transformations
DOI: 10.3969/j.issn.1000-1298.2010.08.033
Database: Compendex
Compilation and indexing terms, ? 2010 Elsevier Inc. 14. Accession number: 20103513195399
Title: Hydraulic performance of pop-up sprinklers with reclaimed sewage effluent
Authors: Li, Yanfeng1 ; Li, Jiusheng1 ; Yin, Jianfeng2
Author affiliation: 1 Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing 100048, China
2 College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Li, J. (lijs@iwhr.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 56-61
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Water distribution, discharge-pressure relation and rotation nonuniformity of pop-up sprinklers during application of reclaimed sewage effluent and groundwater were tested to investigate the effects of water quality on sprinkler performance. The overlapped sprinkler uniformity coefficients were also determined from the radial water distribution of an individual sprinkler. Three types of pop-up sprinklers, DPXHP sprinkler, DPXTS sprinkler (recordable angle adjusting) and Toro V1550 sprinkler, were used and sprinkler performance were measured after the operation of 447h for both sewage effluent and groundwater application. A significant influence of water quality on sprinkler performance was found. Sewage effluent application resulted in 3.4%-4.7% and 2.7%-9.0% reduction in sprinkler discharge and coverage radius, respectively; while sprinklers applying groundwater produced a 0.03%-0.09% reduction in discharge and a 2.5%-3.9% reduction in radius. Sprinkler rotation nonuniformity, represented by a maximum rotation deviation, increased after a continuously operation of 447h, but no significant influence of water quality on the rotation nonuniformity was observed. The influence of water quality on Christiansen uniformity coefficient (CU) was also insignificant.
Number of references: 16
Main heading: Effluents
Controlled terms: Groundwater - Hose - Hydraulics - Rotation - Sewage - Wastewater reclamation - Water pollution - Water quality - Water supply systems
Uncontrolled terms: Discharge - Hydraulic performance - Influence of water - Nonuniformity - Pop-up sprinkler - Reclaimed sewage effluent - Sewage effluents - Water distributions
Classification code: 632.1 Hydraulics - 619.1 Pipe, Piping and Pipelines - 601.1 Mechanical Devices - 453 Water Pollution - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 446.1 Water Supply Systems - 444.2 Groundwater
DOI: 10.3969/j.issn.1000-1298.2010.08.013
Database: Compendex 15. Accession number: 20103513195413
Title: Test and analyse on macromechanic parameters of longan
Authors: Qing, Yanmei1 ; Li, Changyou1 ; Cao, Yuhua1 ; Zhang, Zengxue1 ; Cheng, Hongsheng1
Author affiliation: 1 Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
Corresponding author: Li, C. (lichyx@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 125-134
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: Compression experimental results on longan fruit and pit indicated that the forcedeformation curves of longan fruit compression qualified with the second order quadratic equation and the elastic modulus ranged from 0.90MPa to 0.95MPa. The forcedeformation curves of longan pit compression were nearly linear and the elastic modulus was roughly 40MPa. The transversal and longitudinal stiffness of longan fruit and pit were separately similar. Under different compression rates, longan deformation of broken-hull decreased along with the increase of compression rates. The fruit skin tensile tests were conducted that stress-strain curves and the relationships between elastic modulus and strains were determined. Experimental results indicated that longan can be regarded as isotropy material.
Number of references: 10
Main heading: Stiffness
Controlled terms: Elastic moduli - Fruits - Mechanical properties - Strain - Stress-strain curves - Tensile testing
Uncontrolled terms: Compression rates - Force-deformation curves - Fruit skins - Longan - Longan fruit - Longitudinal stiffness - Quadratic equations - Second orders - Tensile tests
Classification code: 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 422.2 Test Methods - 821.4 Agricultural Products - 921 Mathematics - 951 Materials Science
DOI: 10.3969/j.issn.1000-1298.2010.08.027
Database: Compendex 16. Accession number: 20103513195403
Title: Design of automatic feeding system in standardization pond culture
Authors: Wang, Zhiyong1 ; Shen, Zhixin2 ; Jiang, Tao2 ; Guo, Genxi3
Author affiliation: 1 Key Laboratory of Fishery Equipment and Engineering Ministry of Agriculture, Shanghai 200092, China
2 Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Science, Shanghai 200092, China
3 South China Sea Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510300, China
Corresponding author: Wang, Z. (wzy279@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 77-80 89
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 automatic feeding system was developed based on the pneumatic conveying principle, which took S7200 PLC as controller and touch panel as human machine interface. System structure, main function and working principle of the feeding system were introduced. The design and realization process of the hard circuit and software were discussed. Velocity with feed empty, feeding time and stopping time were setting by the PLC software to automatic control feeding. Experimental results showed that the feeding system met the design requirements. Feeding volume could be 1.1t/h at 320m. The quantitative accuracy was ±1.5%.
Number of references: 13
Main heading: Feeding
Controlled terms：Automation - Control - Design - Lakes - Materials handling equipment - Process control
Uncontrolled terms: Automatic control - Automatic feeding systems - Design requirements - Feeding system - Feeding time - Human Machine Interface - Pneumatic conveying - Pond culture - Quantitative accuracy - Realization process - Stopping time - System structures - Touch panels - Working principles
Classification code: 407 Maritime and Port Structures; Rivers and Other Waterways - 408 Structural Design - 691.1 Materials Handling Equipment - 691.2 Materials Handling Methods - 731 Automatic Control Principles and Applications
DOI: 10.3969/j.issn.1000-1298.2010.08.017
Database: Compendex
17. Accession number: 20103513195420
Title: Per-square-meter yield estimation of paddy based on fractal analysis
Authors: Gong, Hongju1 ; Yu, Haiming1 ; Ji, Changying1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Gong, H. (gonghongju@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 166-170
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A method for estimating paddy yield on the basis of the fractal theory was proposed. The paddy variety was Wuyujing No 3. The image samples of mature paddy were obtained by the self-developed computer vision system. The fractal feature parameters of the images were analyzed. The linear correlation between the fractal dimension and per-square-meter yield of paddy was studied. The mathematical model was established and accuracy reached to 92.57%.
Number of references: 15
Main heading: Fractal dimension
Controlled terms: Computer vision - Estimation - Mathematical models
Uncontrolled terms: Computer vision system - Fractal analysis - Fractal feature parameters - Fractal theory - Image samples - Linear correlation - Paddy - Per-square-meter yield - Yield estimation
Classification code: 723.5 Computer Applications - 921 Mathematics
DOI: 10.3969/j.issn.1000-1298.2010.08.034
Database: Compendex 18. Accession number: 20103513195426
Title: Evaluation method for multi-attributes with interval number based on possibility degree and information axiom
Authors: Cheng, Xianfu1 ; Li, Jun1 ; Xiao, Renbin2
Author affiliation: 1 Key Laboratory of Conveyance and Equipment, East China Jiaotong University, Nanchang 330013, China
2 CAD Center, Huazhong University of Science and Technology, Wuhan 430074, China
Corresponding author: Cheng, X. (chxf_xn@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 194-198
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: For multi-attributes decision making problems with uncertain interval number, a new evaluation method for scheme selection based on possibility degree and information axiom was proposed. Firstly, for different type of the evaluation index, the maximum of the upper bound and the minimum of the lower bound of interval numbers were determined. Then the probability of success satisfying the functional requirement was calculated by identifying the system range and common range of each index, and the information content for each interval number and each scheme were also computed. Finally, the alternatives were ranking according with each alternative's total information content, so the optimal scheme could be selected. For decision-maker, it is not necessary to normalize evaluation index. In the end, the scheme evaluation of plain chain conveyor was taken for an example to illustrate the effectiveness of the proposed approach.
Number of references: 10
Main heading: Decision making
Uncontrolled terms: Decision makers - Evaluation index - Evaluation Method - Functional requirement - Information axiom - Information contents - Interval number - Lower bounds - Multi-attributes - Multi-attributes decision makings - Optimal scheme - Possibility degree - Probability of success - Scheme evaluation - Scheme selection - Selection based - Upper Bound
Classification code: 912.2 Management
DOI: 10.3969/j.issn.1000-1298.2010.08.040
Database: Compendex 19. Accession number: 20103513195398
Title: Numerical simulation and experimental verification of 3-D air-velocity field of disk fan used in orchard sprayer
Authors: Chen, Fayuan1 ; Wang, Xiaochan1 ; Ding, Weimin1 ; Fu, Ximin2 ; Lü, Xiaolan2 ; He, Guomin1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
2 Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author: Wang, X. (wangxiaochan@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 51-55
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to investigate the characteristics of air-velocity field of disk fan used in orchard sprayer, a turbulence model by means of the standard sub-model with appropriate boundary condition was developed and 3-D steady state of air-velocity field of single and double fans was simulated and verified. The results showed that in the distance of 1m to 3m from the double fans center, the velocities of the center region were lower than the both sides, but in the distance of 3m to 5m, the air-velocity distribution of double fans was uniform. The results of comparison showed that the trends of simulated and measured curves were coincident, the correlation determination (R2) of single and double fans were 0.8044 and 0.7957, respectively. The model could accurately predict air-velocity distribution pattern.
Number of references: 18
Main heading: Velocity distribution
Controlled terms: Disks (structural components) - Experiments - Fans - Orchards - Three dimensional - Turbulence models - Velocity - Velocity control
Uncontrolled terms: Air-velocity distribution - CFD simulations - Disk fan - Experimental verification - Numerical simulation - Profile modeling sprayer - Steady state - Velocity field
Classification code: 931.3 Atomic and Molecular Physics - 931.1 Mechanics - 902.1 Engineering Graphics - 901.3 Engineering Research - 821.3 Agricultural Methods - 731.3 Specific Variables Control - 618.3 Blowers and Fans - 443.1 Atmospheric Properties - 408.2 Structural Members and Shapes
DOI: 10.3969/j.issn.1000-1298.2010.08.012
Database: Compendex 20. Accession number: 20103513195404
Title: Fertilization value of biomass ash with low potassium
Authors: Li, Lianming1 ; Yu, Chunjiang1 ; Qin, Jianguang1 ; Fang, Mengxiang1 ; Luo, Zhongyang1
Author affiliation: 1 State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Corresponding author: Yu, C. (chunjiang@cmee.zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 81-89
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 typical components and physical/chemical characteristics of the ash were introduced based on the relative research works carried out all around the world, as well as its influences on plants, upper soil layer vegetation, soil microbial population and environment after application. Generally, this kind of ash has low potassium content, but high pH value due to high Ca content. It's a good remedy for acid soil. The high pH value is also valuable for improving composition of soil microorganism, enhancing their activities and thereafter increasing the fertility of soil. Meanwhile, the ash is rich in certain elements, which are critical to modify the elements constitution of soil and increase the availability of N and K in usual situation. As far as current research is concerned, the fertilization of wood ash achieves element circle, improves soil characteristic to some degree.
Number of references: 55
Main heading: Soils
Controlled terms：Biomass - Calcium - Combustion - pH effects - Potassium - Vegetation
Uncontrolled terms: Acid soils - Biomass ashes - Current researches - Fertilization value - High pH value - Soil characteristic - Soil characteristics - Soil layer - Soil micro-organisms - Soil microbial population - Wood ash
Classification code: 821.5 Agricultural Wastes - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 801.1 Chemistry, General - 549.2 Alkaline Earth Metals - 549.1 Alkali Metals - 521.1 Fuel Combustion - 483.1 Soils and Soil Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.08.018
Database: Compendex 21. Accession number: 20103513195387
Title: Active speed-tuning control in the process of gearshift for heavy PSHEV
Authors: Wang, Weida1 ; Li, Hongcai1 ; Xiang, Changle1 ; Han, Lijin1 ; Liu, Yahui2
Author affiliation: 1 National Key Laboratory of Vehicle Transmission, Beijing Institute of Technology, Beijing 100081, China
2 Department of Automotive Engineering, Tsinghua University, Beijing 100084, China
Corresponding author: Li, H. (armwtank@bit.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 1-5 24
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 active speed-tuning control in the process of gearshift can ensure the ideal gear-shifting quality and the driving performance. For parallel and series hybrid electric vehicle (PSHEV), the control is more difficult because of the multi-powers. The active speed-tuning control algorithm used to reduce the impingement of components and the duel-loop control algorithm was presented in this paper. The outer control loop based on the increment PID algorithm controlled the speed error between the active and passive components; the inner control loop based on the fuzzy control logic controlled the regulation of the engine, electric motor and the generator. The online tests on the bench were carried on using the ECU of PSHEV. The test results indicated that the active speed-tuning control algorithm could control the components working harmoniously and ensure a fast and smooth gearshift.
Number of references: 8
Main heading: Process control
Controlled terms: Algorithms - Automobile drivers - Automobiles - Electric vehicles - Fuzzy control - Remote control - Secondary batteries - Speed - Tuning
Uncontrolled terms: Active speed-tuning control - Control algorithms - Control loop - Driving performance - Gearshift - Hybrid electric vehicle - Increment PID algorithm - Loop control - On-line tests - Passive components - Speed errors - Speed-tuning - Test results
Classification code: 931.1 Mechanics - 921 Mathematics - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 723 Computer Software, Data Handling and Applications - 713 Electronic Circuits - 702.1.2 Secondary Batteries - 662.1 Automobiles - 432 Highway Transportation
DOI: 10.3969/j.issn.1000-1298.2010.08.001
Database: Compendex 22. Accession number: 20103513195428
Title: Effect of reduction on quality of trapezoidal inner gear formed by spinning
Authors: Sun, Lingyan1 ; Xia, Qinxiang1 ; Ye, Bangyan1 ; Cheng, Xiuquan2
Author affiliation: 1 School of Mechanical and Automobile Engineering, South China University of Technology, Guangzhou 510640, China
2 Department of Aircraft Maintenance Engineering, Guangzhou Civil Aviation College, Guangzhou 510403, China
Corresponding author: Xia, Q. (meqxxia@scut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 206-210
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: Inner gear spinning technology with three rollers was analyzed. According to the material flowing characteristics during spin-forming, two forming quality evaluation factors were put forward and then filling status of gear tooth under different reductions was analyzed. The results indicated that there was an optimum reduction for blank with certain thickness during inner gear spinning. When the reduction was below, the filling status in gear tooth was unsatisfied due to lack of filling material; when the radial reduction was above, the increasing forming force induced by higher reduction would likely decrease the service life of forming tool, and excess relative reduction would result in the status of underfills in the gear tooth.
Number of references: 9
Main heading: Metal spinning
Controlled terms: Breeding blankets - Computational methods - Computer simulation - Filling - Gear teeth
Uncontrolled terms: Filling materials - Forming forces - Forming quality - Forming tools - Inner gear - Radial reduction - Relative reduction - Spin-forming - Spinning technologies - Underfills
Classification code: 535.2 Metal Forming - 601.2 Machine Components - 691.2 Materials Handling Methods - 723.5 Computer Applications - 921 Mathematics - 932.2 Nuclear Physics
DOI: 10.3969/j.issn.1000-1298.2010.08.042
Database: Compendex 23. Accession number: 20103513195423
Title: Hierarchical cluster analysis of tobacco leaves from different areas based on fractal color
Authors: Wei, Chunyang1 ; Zhang, Yunhe2 ; Song, Yubing1 ; Li, Feng1 ; Xue, Chaoqun1 ; Cai, Xianjie1
Author affiliation: 1 Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
2 National Engineering Research Center for Information Technology in Agriculture, Beijing 100089, China
Corresponding author: Cai, X. (caixj@ztri.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 178-183
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: High definition digital images of tobacco leaves were obtained, which were made on removing the background and segmentation processing. All the components of tobacco leaf color, such as red, green, blue and luminance, were calculated, as new indexes quantitatively described the color distribution state of tobacco leaf surface. The box-counting dimension variation curve of every color component was plotted. A hierarchical cluster analysis was performed on tobacco leaf color with fractal dimension as parameter. The results showed that there was obvious difference in the box-counting dimension variation curve of every color component of tobacco leaves from different growing areas. Cluster analysis with fractal dimension as parameter was very well consistent with tobacco grade experts. These results indicated color fractal dimension, as characteristic index of color classification, could more accurately describe the fractal distributed features of image color.
Number of references: 20
Main heading: Fractal dimension
Controlled terms: Cluster analysis - Color - Hierarchical systems - Image segmentation - Partial discharges - Tobacco
Uncontrolled terms: Box-counting dimension - Color classification - Color component - Color distribution - Digital image - Hierarchical cluster analysis - High definition - Image color - Leaf color - Leaf surfaces - Segmentation processing - Tobacco leave
Classification code: 961 Systems Science - 922 Statistical Methods - 921 Mathematics - 821.4 Agricultural Products - 741.1 Light/Optics - 723 Computer Software, Data Handling and Applications - 701.1 Electricity: Basic Concepts and Phenomena
DOI: 10.3969/j.issn.1000-1298.2010.08.037
Database: Compendex 24. Accession number: 20103513195406
Title: Experiments on pretreatment and anaerobic digestion of asparagus stalk for biogas production
Authors: Sun, Chen1 ; Liu, Ronghou1 ; Qin, Guodong1
Author affiliation: 1 School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author: Liu, R. (liurhou@sjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 94-99 120
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: NaOH pretreatment of asparagus stalk without fluid water and its anaerobic digestion after pretreatment were performed in order to improve biogas production. Effects of pretreatment time, particle size and NaOH concentration on contents of cellulose, hemicellulose and lignin and yield of biogas were investigated in a bench scale anaerobic digester. Results showed that start-up time of test group with pretreatment time of 15-20d was 10d earlier than that of test group without pretreatment. After the asparagus stalk was crumbled and cut, the start-up time of test group without screening was 5-15d earlier than that of groups with different particle size after screening. At the same time, the fermentation time was shortened by 23d. Total biogas yield of test groups using 5% NaOH in pretreatment were 453.82% and 84.58% higher than groups with 10% and 0% NaOH in pretreatment, respectively. After integrated analysis of experimental results, the suitable NaOH pretreatment conditions were determined as follows: NaOH pretreatment of 15-20d, no screening after crumbling and cutting and with NaOH concentration of 5%. Under this kind of pretreatment conditions, methane content of biogas during anaerobic digestion was above 70%, while pH value was above 7.5, which were located in normal range.
Number of references: 16
Main heading: Anaerobic digestion
Controlled terms: Biogas - Cellulose - Lignin - Methanation - Methane
Uncontrolled terms: Anaerobic digester - Asparagus - Biogas production - Integrated analysis - Lignocellulose - Methane content - NaOH concentration - NaOH pretreatment - pH value - Pre-Treatment - Pretreatment conditions - Stalk - Startup time
Classification code: 522 Gas Fuels - 802.2 Chemical Reactions - 815.1.1 Organic Polymers
DOI: 10.3969/j.issn.1000-1298.2010.08.020
Database: Compendex 25. Accession number: 20103513195400
Title: Investigation on electrostatic spray of capillary in cone-jet mode using PIV
Authors: Wang, Zhentao1 ; Mao, Huimin1 ; Luo, Tiqian1
Author affiliation: 1 College of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Wang, Z. (wickol@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
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 particle image velocimetry (PIV) was used to measure the cone-jet flow in electrostatic spray. The mode of spraying was observed. The droplets' velocity and flow vector graphs were analyzed. Streamlines field under different voltages were obtained. The forces acted on the droplets in their transportation and the change of the velocity and flow field were analyzed. The experiment indicated that, with the increasing of voltage, the flow field was distributed uniformly and the droplets' velocity along the axes increased with electrostatic forces, polarization forces and fluid forces together. With the increasing of axes distance, the droplets' velocity in the same section along the radius increased under the same voltage, and the velocity uniformity in the same section improved.
Number of references: 16
Main heading: Velocity
Controlled terms: Drop formation - Electrostatic force - Flow fields - Flow visualization - Velocity measurement
Uncontrolled terms: Cone-jet mode - Droplets velocity - Electrostatic spray - Flow vectors - Fluid forces - Jet flow - Particle image velocimetries - PIV - Polarization forces
Classification code: 631.1 Fluid Flow, General - 701.1 Electricity: Basic Concepts and Phenomena - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 943.3 Special Purpose Instruments
DOI: 10.3969/j.issn.1000-1298.2010.08.014
Database: Compende 26. Accession number: 20103513195412
Title: Gelatinizing properties of stored milled rice under typical storage conditions
Authors: Zhang, Yurong1 ; Zhou, Xianqing1
Author affiliation: 1 College of Food Science and Technology, Henan University of Technology, Zhengzhou 450052, China
Corresponding author: Zhou, X. (xianqingzh@haut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 125-130
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 stored rice quality changes and its impact factors, the commercial milled Indica rice was used as the raw material. By using programmable artificial climate chamber, the simulation storage temperature and humidity parameters were set as 15°C without relative humidity (RH) controlling; 15°C, RH 75%; 20°C, RH 65%; 25°C, RH 65%; 30°C, RH 80% and natural storage without temperature and humidity controlling according to the typical average temperature and humidity of China grain storage regions. The gelatinizing characteristic values were periodically determinated, and the results showed that the peak viscosity (PV), final viscosity (FV) and hold viscosity (HV) had a increasing trend as the storage time extended, the change of setback (SB) value was slight in the early storage period, but in the later storage period, the changes in both normal temperature and high temperature storage conditions had increasing trends, while in low temperature or quasi-low temperature storage had decreasing trends. Storage time was significantly correlated with PV, FV and HV respectively. The effects of storage conditions on PV, FV and HV were not significant in the early storage period, but significant in the later storage period.
Number of references: 12
Main heading: Humidity control
Controlled terms: Atmospheric humidity - Viscosity
Uncontrolled terms: Artificial climate chamber - Average temperature - Characteristic value - Gelatinizing property - Grain storage - High temperature storage - Impact factor - Indica rice - Low temperatures - Low-temperature storage - Milled rice - Peak viscosities - Quality - Quality change - Relative humidities - Storage - Storage condition - Storage periods - Storage temperatures - Storage time
Classification code: 402 Buildings and Towers - 443.1 Atmospheric Properties - 631.1 Fluid Flow, General
DOI: 10.3969/j.issn.1000-1298.2010.08.026
Database: Compendex 27. Accession number: 20103513195417
Title: Image recognition and counting for glasshouse Aphis gossypii
Authors: Qiu, Baijing1 ; Wang, Tianbo1 ; Li, Juanjuan1 ; Li, Kun1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Qiu, B. (qbj@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 151-155
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Characteristics of the Aphis gossypii area, background and mixed area (include Aphis gossypii area and background) were analyzed and principle of determining was establish based on the threshold G component. Then Aphis gossypii area and non-Aphis gossypii area were separated using the threshold G component. For the overlapping Aphis gossypii, the input image were marked using the minimum extension transform, then distance transform and watershed algorithm was applied to the marked image, and the overlapping was removed. Experimental results showed that this algorithm could effectively segment the overlapping Aphis gossypii. The sum of over-segmentation rate and under-segmentation rate was 3.14%. The accurate rate was 96.2%, which was higher than the direct counting.
Number of references: 12
Main heading: Image segmentation
Controlled terms: Greenhouses - Image recognition - Imaging systems
Uncontrolled terms Aphis gossypii - Detection - Distance transforms - Extension transforms - Input image - Marked image - Over segmentation - Overlap - Water-shed algorithm
Classification code: 402.1 Industrial and Agricultural Buildings - 716 Telecommunication; Radar, Radio and Television - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 746 Imaging Techniques
DOI: 10.3969/j.issn.1000-1298.2010.08.031
Database: Compendex 28. Accession number: 20103513195427
Title: Tooth contact analysis for unsymmetric gear with double pressure angles
Authors: Xiao, Wangqiang1 ; Duan, Dongping1 ; Li, Wei2 ; Zhao, Jiwei1 ; Li, Ting1
Author affiliation: 1 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
2 School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Corresponding author: Xiao, W. (wqxiao@home.ipe.ac.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 199-205
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to increase load capacity and reduce weight, size and vibration level of gear transmission system, a new-style unsymmetric gear with different pressure angles was designed. Modification of pinion geometry could reduce the transmission errors and achieve a more favorable shape for the function of transmission errors. The process of meshing and contact for unsymmetric gear with double pressure angles in case of modified geometry and transmission errors was proposed. Computer programs of tooth contact analysis (TCA) of unsymmetric gear and conventional gear were developed. Two versions of modified geometry were investigated and compared with numerical examples. The results showed that the displacement of contact path of unsymmetric gear was smaller than conventional symmetric gear where alignment errors exist, and the function of transmission errors for unsymmetric gear was indeed a continuous parabolic one with a reduction in magnitude. It was proved that involute gear with unsymmetric tooth could efficiently improve transmission stabilization and load capacity of tooth surface.
Number of references: 9
Main heading: Error detection
Controlled terms: Computational geometry - Spur gears
Uncontrolled terms: Double pressure angle - Gear transmission - Tooth contact analysis - Transmission error - Unsymmetric gear profile
Classification code: 601.2 Machine Components - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.5 Computer Applications
DOI: 10.3969/j.issn.1000-1298.2010.08.041
Database: Compendex 29. Accession number: 20103513195391
Title: Design and performance simulation of ROPS and energy-absorbing device
Authors: Si, Junde1 ; Wang, Guoqiang1 ; Yan, Zhenhua1 ; Wang, Jixin1 ; Hao, Wanjun1
Author affiliation: 1 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author: Hao, W. (wjhao@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 20-24
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: For a certain engineering vehicle roll in the sloped area, the finite element model and multi-rigid-body model were developed based on the nonlinear finite element method and multi-rigid-body approach, respectively. The dynamic simulations were performed. The deflection and absorbed energy were predicted, the dynamic response and injury risks of the operator during lateral roll were also predicted. Results showed that the roll-over protective structure (ROPS) and energy-absorbing device could prevent the vehicle continuous roll on the slopes with small angles and reduce the plastic deformation of ROPS. The severity of the peak decelerations transferred to the vehicle cabin was also reduced simultaneously.
Number of references: 12
Main heading: Structural design
Controlled terms: Automobile bodies - Automobile parts and equipment - Computer simulation - Dynamic response - Finite element method - Vehicles
Uncontrolled terms: Absorbed energy - Absorbing devices - Dynamic simulation - Energy-absorbing device - Engineering vehicle - Engineering vehicles - Finite element models - Injury risk - Multi-rigid-body - Nonlinear finite element method - Performance simulation - Protective structures - Simulation - Vehicle cabin
Classification code: 408.1 Structural Design, General - 432 Highway Transportation - 663.2 Heavy Duty Motor Vehicle Components - 723.5 Computer Applications - 921.6 Numerical Methods
DOI: 10.3969/j.issn.1000-1298.2010.08.005
Database: Compendex 30. Accession number: 20103513195408
Title: Detecting subtle bruises on fruits with nuclear magnetic resonance imaging
Authors: Zhou, Shuiqin1, 2 ; Shang, Desheng3 ; Ying, Yibin1 ; Liao, Yitao1
Author affiliation: 1 College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
2 Fair Friend Institute of Electromechanics, Hangzhou Vocational and Technical College, Hangzhou 310018, China
3 The First Affiliated Hospital of College of Medicine, Zhejiang University, Hangzhou 310003, China
Corresponding author: Ying, Y. (ybying@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 107-110
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: The nuclear magnetic resonance(NMR) imaging was proposed to detect the subtle bruises on fruits. Chinese pears were selected as the experimental object. The nuclear magnetic resonance images of pears were acquired by horizontal scanning mode. Image processing, which included auto thresh segmentation, morphologic operation and boundary extraction was finished by Matlab software. At last the corner detection was used to determine whether the pear had subtle bruises. Experimental results showed that detecting subtle bruises on fruits with NMR technique was feasible. The accuracy of detection for subtle bruises and other pears was 92.1% and 100%, respectively.
Number of references: 14
Main heading: Magnetic resonance imaging
Controlled terms: Agriculture - Fruits - Image segmentation - Magnetism - Nuclear magnetic resonance - Resonance
Uncontrolled terms: Boundary extraction - Chinese pear - Corner detection - Horizontal scanning - Matlab- software - NMR techniques - Noninvasive inspection
Classification code: 701 Electricity and Magnetism - 701.2 Magnetism: Basic Concepts and Phenomena - 741.1 Light/Optics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 932.2 Nuclear Physics
DOI: 10.3969/j.issn.1000-1298.2010.08.022
Database: Compendex 31. Accession number: 20103513195397
Title: Design and kinematic analysis of double controlled forward transplanting mechanism with spur gears
Authors: Zhao, Weikang1 ; Gao, Yang2 ; Xue, Yongfeng1 ; Yu, Jian3 ; Sun, Liang4
Author affiliation: 1 College of Mechanical Engineering, Ningxia University, Yinchuan 750021, China
2 School of Chemistry and Chemical Engineering, North University for Ethnics, Yinchuan 750021, China
3 Ningxia Technical Advice Station of Mechanization of Farming, Yinchuan 750021, China
4 College of Machine and Automation Control, Zhejiang Sci-Tech University, Hangzhou 310018, China
Corresponding author: Zhao, W. (zwk_nx@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 48-50
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 design method and working principle of forward transplanting mechanism with spur gears was discussed, and the analytical model of mechanism kinematics was built. By using ADAMS, the motion simulation and optimization of transplanting mechanism were realized. At the same time, the motion trajectory and motion curves of transplanting mechanism were obtained. The result confirmed that the mechanism could meet the kinematic goals while transplanting.
Number of references: 6
Main heading: Spur gears
Controlled terms: Design - Kinematics - Mathematical models
Uncontrolled terms: Analytical model - Design method - High-speed - Kinematic Analysis - Kinematical analysis - Motion curve - Motion simulations - Motion trajectories - Transplanting mechanism - Working principles
Classification code: 408 Structural Design - 601.2 Machine Components - 921 Mathematics - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.08.011
Database: Compendex 32. Accession number: 20103513195416
Title: Optimization of de-coloration technology for polysaccharides from longan pulp
Authors: Yi, Yang1 ; Zhang, Mingwei2 ; Liao, Sentai2 ; Wei, Zhencheng2 ; Tang, Xiaojun2 ; Zhang, Ruifen2
Author affiliation: 1 College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
2 Bio-Tech Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, China
Corresponding author: Liao, S. (liaost@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 146-150 155
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: De-coloration rate, polysaccharides holding rate and protein removal rate of eight resins on longan polysaccharides were studied. The results showed that anion exchange resin D301F presented good de-colorizing effects. De-colorizing experiments were carried out by single experiment and orthogonal experiment. The data indicated that the colorants were most possibly small-molecular-weight substances with negative charge. The optimum technological parameters were as follows: the ratio for resin and crude polysaccharides solution (the mass ratio was 4%) was 0.16g/mL under the condition of 50°C and pH value 5. The de-coloration rate was 90.21%, the polysaccharides holding rate was 85.75%, the protein removal rate was 73.12%.
Number of references: 15
Main heading: Polysaccharides
Controlled terms: Experiments - Optimization - Proteins - Resins
Uncontrolled terms: Anion exchange resins - De-coloration - Longan - Mass ratio - Negative charge - Orthogonal experiment - pH value - Polysaccharides solution - Protein removal - Technological parameters
Classification code: 804.1 Organic Compounds - 815.1.1 Organic Polymers - 901.3 Engineering Research - 921.5 Optimization Techniques
DOI: 10.3969/j.issn.1000-1298.2010.08.030
Database: Compendex 33. Accession number: 20103513195415
Title: Saccharifying experiment of degermed corn with added enzyme extruded at low temperature for production of corn syrup
Authors: Shen, Dechao1 ; Xi, Kewei2 ; Ma, Chengye1
Author affiliation: 1 College of Agricultural Engineering and Food Science, Shandong University of Technolofgy, Zibo 255049, China
2 Engineering College, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Shen, D. (shendc@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 140-145
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Degermed corn grist with added enzyme extruded at low temperature was mashed and saccharified directly for production of corn syrup was carried out. Starch production and spraying liquescence procedure in traditional double enzyme method were omitted. Thereby the corresponding water consumption, electricity consumption and its environment pollution were all omitted. The influence regularity of parameters in extrusion-liquescence system to main indexes of syrup was analyzed. The laboratory experimental results indicated the filtration speed of syrup, the value of DE and the available ratio of starch in syrup for degermed corn extrudate with added enzyme when saccharified for 12h were 239.8-269.5L/(m2 · h), 89.2%-89.3% and 96.2%-97.2%, respectively. The productive experimental results indicated the values of syrup DE of degermed corn extrudate with high temperature resistant α-amylase for 17h and 19h were 95.89% and 95.10%, respectively, the transparence percent of above syrup were 98.5% and 98.0%, respectively.
Number of references: 20
Main heading: Experiments
Controlled terms: Enzymes - Extrusion - Low temperature production - Starch - Water supply
Uncontrolled terms: Corn syrup - Degermed corn - Electricity-consumption - Environment pollution - Enzyme preparation - Extrudates - High-temperature resistant - Low temperatures - Saccharifying - Starch production - Water consumption
Classification code: 446.1 Water Supply Systems - 535.2.2 Metal Forming Practice - 644.4 Cryogenics - 804.1 Organic Compounds - 901.3 Engineering Research
DOI: 10.3969/j.issn.1000-1298.2010.08.029
Database: Compendex 34. Accession number: 20103513195424
Title: Beef marbling extraction based on modified fuzzy C-means clustering algorithm
Authors: Qiu, Jinhong1 ; Shen, Mingxia1 ; Peng, Zengqi2 ; Liang, Kun1 ; Wu, Haijuan1 ; Shi, Jie2
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
2 College of Food Engineering, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author: Shen, M. (mingxia@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 184-188
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Beef marbling extraction method based on modified fuzzy C-means clustering algorithm was proposed. The proposed method combined with the fast fuzzy C-means clustering algorithm. The membership function, number of clusters C and the selection of initial cluster center in traditional fuzzy C-means clustering algorithm were modified. Experiments showed that, with the proposed method, the accuracy of marbling extraction was increased from 76.2% to 85.7%.
Number of references: 13
Main heading: Clustering algorithms
Controlled terms: Fuzzy clustering - Fuzzy systems - Meats - Membership functions
Uncontrolled terms: Beef - Extraction method - Fuzzy C mean - Fuzzy c-means clustering algorithms - Initial cluster centers - Marbling - Number of clusters
Classification code: 721 Computer Circuits and Logic Elements - 723 Computer Software, Data Handling and Applications - 822.3 Food Products - 921 Mathematics - 961 Systems Science
DOI: 10.3969/j.issn.1000-1298.2010.08.038
Database: Compendex 35. Accession number: 20103513195401
Title: Design and test analysis of peanut combine flexible clamping device
Authors: Yang, Ranbing1 ; Shang, Shuqi1
Author affiliation: 1 College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
Corresponding author: Shang, S. (sqshang@qau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 67-71
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In traditional peanut combine harvest, loss rate of peanut in the process of chain rigidity clamping is rather high. Thus, three-belt clamping technology was proposed. Making use of general three-belt flexible clamping cushion to peanut, general three-belt clamping feeding device was developed. Belt type, belt distance, belt speed and so on were determined through bench tests. And according to the field comparative tests to chain rigidity clamping feeding mode, comprehensive evaluation was done on testing index, such as pulling-down peanut drop rate, clamping feeding rate, clamping breaking rate, soil removing rate, straw falling rate, peanut falling rate and so on. The results showed that loss rate of the general three-belt clamping feeding mode was rather low and more suitable for current Chinese peanut harvest situation.
Number of references: 11
Main heading: Testing
Controlled terms: Clamping devices - Design - Feeding - Harvesters - Harvesting - Rigidity - Soil testing
Uncontrolled terms: Bench tests - Chain rigidity - Comparative tests - Comprehensive evaluation - Design and tests - Falling-rate - Feeding modes - Feeding rate - Loss rates - Peanut combine harvester - Removing rates - Tests
Classification code: 821.3 Agricultural Methods - 821.1 Agricultural Machinery and Equipment - 691.2 Materials Handling Methods - 951 Materials Science - 605 Small Tools and Hardware - 423.2 Test Methods - 408 Structural Design - 483.1 Soils and Soil Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.08.015
Database: Compendex 36. Accession number: 20103513195393
Title: Retrieval strategy of spade punch planter for digital design case
Authors: Li, Chenghua1 ; Yang, Yu2 ; Zhang, Xiaodong2 ; Zhang, Guoliang3
Author affiliation: 1 School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110168, China
2 College of Engineering, Shenyang Agricultural University, Shenyang 110161, China
3 College of Forestry, Agricultural University of Hebei, Baoding 071000, China
Corresponding author: Li, C. (chenghuali2000@yahoo.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 31-34 55
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In the procedure of digital design of machinery system based on case-based reasoning (CBR), retrieval strategy and method of case had decisive influence on validity and reliability of retrieve. Combined with object-oriented case representation approach, determination method for resemblance level of machinery parts characteristics during case retrieval procedure was analyzed, fuzzy mathematics and grey relational analysis methods were introduced into calculation of resemblance level of characteristics properties. Combination weight for characteristic properties of the machinery parts was determined through hierarchy analysis process and deviation information method based on similarity values. The case retrieval calculation method had high discernment and verified successfully through design procedure of spade punch planter.
Number of references: 11
Main heading: Case based reasoning
Controlled terms: Information retrieval - Machine design - Machinery
Uncontrolled terms: Calculation methods - Case representation - Case retrieval - Characteristic properties - Combination weights - Design case - Design procedure - Determination methods - Digital design - Digital designs - Fuzzy mathematics - Grey relational analysis - Hierarchy analysis - Machinery systems - Object oriented - Retrieval methods - Retrieval strategies - Spade punch planter
Classification code: 601 Mechanical Design - 723.4 Artificial Intelligence - 723.5 Computer Applications
DOI: 10.3969/j.issn.1000-1298.2010.08.007
Database: Compendex 37. Accession number: 20103513195389
Title: Feed-forward integrated with fuzzy PID feedback current control algorithm in electric power steering
Authors: Lü, Wei1 ; Guo, Konghui1 ; Zhang, Jianwei1
Author affiliation: 1 State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Changchun 130025, China
Corresponding author: Lü, W. (lwascl@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 10-15
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to solve the current tracking control problem in electric power steering (EPS), the system mathematical model was established and the system type was analyzed, disadvantages of the conventional PID control and fuzzy PID control were studied. Using the feed-forward and feedback integrating control theory, a feed-forward control integrated with fuzzy PID feedback control algorithm was proposed. Experiment comparisons showed that the proposed algorithm could significantly improve the system stability, response rapidity and following accuracy in current control of electric power steering system.
Number of references: 10
Main heading: Steering
Controlled terms: Algorithms - Automobile parts and equipment - Automobile steering equipment - Control system stability - Electric current control - Electricity - Mathematical models - Proportional control systems - System stability - Three term control systems - Two term control systems
Uncontrolled terms: Current control - Current following - Current tracking control - Electric power steering - Electric power steering system - Feed-Forward - Fuzzy PID-control - Fuzzy-PID - PID control
Classification code: 663.2 Heavy Duty Motor Vehicle Components - 701.1 Electricity: Basic Concepts and Phenomena - 731.1 Control Systems - 731.4 System Stability - 921 Mathematics
DOI: 10.3969/j.issn.1000-1298.2010.08.003
Database: Compendex 38. Accession number: 20103513195392
Title: Mechanism of polygonal wear of tire based on variable stiffness of lateral
Authors: Li, Yong1 ; Zuo, Shuguang1
Author affiliation: 1 School of Automotive Studies, Tongji University, Shanghai 201804, China
Corresponding author: Zuo, S. (sgzuo@tongji.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 25-30
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: Considering the nonlinear characteristic of tire's grounding friction, a polygonal wear model of tire was established based on variable stiffness of lateral. Then the stability of system was analyzed, and the self-excited vibration of tire was proved to be a kind of stable periodic vibration caused by Hopf bifurcation of system. Finally, the ranges of speed and toe-in angle which could motivate self-excited vibration were given through numerical simulation. The results showed that the polygonal wear was a typical nonlinear self-excitation vibration phenomenon caused by the tread's lateral self-excited vibration, and the polygonal number was equivalent to the ratio of the lateral vibration frequency of tire tread to the rotational frequency of tire. This model could explain the formation mechanism of the polygonal wear of tire.
Number of references: 8
Main heading: Vibration analysis
Controlled terms: Hopf bifurcation - Number theory - Stiffness - Tires
Uncontrolled terms: Formation mechanism - Lateral vibrations - Nonlinear characteristics - Numerical simulation - Periodic vibrations - Polygonal wear - Rotational frequency - Self-excitation vibration - Self-excited vibrations - Tire tread - Variable stiffness
Classification code: 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 818.5 Rubber Products - 921 Mathematics - 943.2 Mechanical Variables Measurements - 951 Materials Science
DOI:10.3969/j.issn.1000-1298.2010.08.006
Database: Compendex 39. Accession number: 20103513195390
Title: Sound quality prediction of vehicle exhaust noise based on neural network
Authors: Shi, Yan1 ; Shu, Gequn1 ; Bi, Fengrong1 ; Liu, Hai1
Author affiliation: 1 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Corresponding author: Bi, F. (fr_bi@tju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 16-19 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: Sensory pleasantness evaluation of eighteen vehicle exhaust noises were obtained by paired comparison jury test. Loudness, sharpness, roughness, fluctuation strength and kurtosis were selected for objectively characterizing the sound quality of exhaust noise. The sound quality prediction model of vehicle exhaust noise was established based on back-propagation neural network. Sensory pleasantness of exhaust noise samples were obtained through the prediction model and the results were compared with that obtained through multiple linear regression prediction model. The result showed that the prediction values were close to the measured values, the neural network model was more effective than multiple linear regression model in prediction of individual exhaust noise. The neural network prediction model represented the nonlinear relation between sensory pleasantness and objective parameters exactly and could be used for predicting the sound quality of vehicle exhaust noise.
Number of references: 15
Main heading: Neural networks
Controlled terms: Acoustic variables measurement - Forecasting - Linear regression - Mathematical models - Vehicles
Uncontrolled terms: Back propagation neural networks - Exhaust noise - Jury test - Multiple linear regression models - Multiple linear regressions - Neural network model - Neural network prediction model - Nonlinear relations - Objective parameters - Paired comparison - Prediction model - Sound Quality - Vehicle exhausts
Classification code: 432 Highway Transportation - 723.4 Artificial Intelligence - 921 Mathematics - 922.2 Mathematical Statistics - 941.2 Acoustic Variables Measurements
DOI: 10.3969/j.issn.1000-1298.2010.08.004
Database: Compendex 40. Accession number: 20103513195388
Title: Real-time estimation of tire road friction coefficient based on extend state observer
Authors: Yang, Fuguang1, 2 ; Li, Yibin1 ; Ruan, Jiuhong1, 2 ; Rong, Xuewen1 ; Song, Rui1
Author affiliation: 1 School of Control Science and Engineering, Shandong University, Ji'nan 250061, China
2 Advanced Vehicle and Robot Institute, Shandong Jiaotong University, Ji'nan 250023, China
Corresponding author: Li, Y. (liyb@sdu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 6-9 15
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The road adhesion coefficient real-time estimation for vehicle dynamic control was investigated. Firstly, dynamic model of tire for braking was given based on magic formulation. Secondly, the related item to adhesion coefficient of the dynamic model was considered as one extended state of braking system, so extended state observer (ESO) was designed to estimate friction force between roads and tire in real-time based on the velocity of wheel and torque for braking. Adhesion coefficient was deduced. Finally, simulations were performed on uniformity road and varied road. The simulation results showed this method was robust to parameters perturbation of braking system and sensor noise, it could estimate adhesion coefficient exactly in real-time. Observer was separated from controller design.
Number of references: 9
Main heading: Adhesion
Controlled terms: Brakes - Braking - Dynamic models - Friction - Roads and streets - State estimation - Tires
Uncontrolled terms: Adhesion coefficient - Braking system - Controller designs - Extended state observer - Friction force - Real-time estimate - Real-time estimation - Sensor noise - Simulation result - State observer - Tire-road friction - Vehicle dynamic control
Classification code: 931.1 Mechanics - 921 Mathematics - 818.5 Rubber Products - 951 Materials Science - 801 Chemistry - 602 Mechanical Drives and Transmissions - 406.2 Roads and Streets - 731.1 Control Systems
DOI: 10.3969/j.issn.1000-1298.2010.08.002
Database: Compendex 41. Accession number: 20103513195430
Title: Worksteps sequencing and optimization of mill/turn machining center based on improved genetic algorithm
Authors: Su, Yuliang1 ; Chu, Xuening1 ; Sun, Xiwu1 ; Tang, Censhu1
Author affiliation: 1 School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author: Su, Y. (suyuliang@sjtu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 216-222
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Mill/turn machining center can perform several operations simultaneously with multiple spindles and power turrets, which means worksteps sequencing should be integrated with scheduling. According to the characteristics of mill/turn machining center, an improved genetic algorithm to optimize worksteps sequence was proposed. A 01 mixed integer programming model was set up to support the algorithm with object function and constraints. In order to present so many parameters of the 01 mixed integer programming model, coding strategy was developed based on data structure instead of integer or symbol. According to the similarity of genes, two novel genetic operators named multi-probability crossover operator and multi-probability mutation operator were also introduced. Consequently, these genetic operators insure that chromosomes consisted of genes with more similarity could transmit their characteristics to next generation with higher probability. The effectiveness of the proposed algorithm was verified by a real case using dual spindles and twin power turrets mill/turn machining center. The results also indicated that the improved genetic algorithm gained a better performance than the conventional genetic algorithm.
Number of references: 8
Main heading: Mathematical operators
Controlled terms: Data structures - Dynamic programming - Genes - Genetic algorithms - Integer programming - Machining - Machining centers - Optimization - Probability
Uncontrolled terms: 0-1 mixed integer programming - Coding strategy - Crossover operator - Genetic operators - Improved genetic algorithms - Mill/turn machining center - Mutation operators - Object functions - Worksteps sequencing
Classification code: 922.1 Probability Theory - 921.5 Optimization Techniques - 921 Mathematics - 723.3 Database Systems - 604.2 Machining Operations - 603.1 Machine Tools, General - 461.2 Biological Materials and Tissue Engineering
DOI: 10.3969/j.issn.1000-1298.2010.08.044
Database: Compendex 42. Accession number: 20103513195429
Title: Performance of pulsed jet on-off valve based on giant magnetostrictive actuator
Authors: Meng, Aihua1 ; Li, Mingfan2 ; Pan, Yuliang1 ; Zhou, Jianjun1
Author affiliation: 1 School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
2 Hangzhou Zhejiang University Jingyi Electromechanical Technology Engineering Co., Ltd, Hangzhou 310027, China
Corresponding author: Meng, A. (tulipmah@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 211-215
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 performances of pulsed jet on-off valve based on giant magnetostrictive actuator(GMA) are affected by structure parameters of actuator. The physical model between flux and driving current of the valve was built, and their relationship was simulated by Matlab. The response of different parameters, such as number of solenoids, eddy current time constant, effective mass of actuator, effect on the valve flux in frequency domain and time domain were analyzed respectively. The trends of flux with actuator parameters were abstracted from the simulation results. The eddy current time constant was the main factor which confirmed by experiments. To enlarge the response frequency band and shorten the response time, the number of the solenoid and the eddy current time constant should be decreased.
Number of references: 12
Main heading: Solenoid valves
Controlled terms: Actuators - Computer simulation - Eddy currents - Frequency bands - Frequency response - Magnetostrictive devices - Solenoids - Time domain analysis
Uncontrolled terms: Driving current - Effective mass - Frequency domains - Giant magnetostrictive actuator - Performance analysis - Physical model - Pulsed jet on-off valve - Response frequency - Response time - Simulation result - Structure parameter - Time constants - Time domain
Classification code: 731.1 Control Systems - 723.5 Computer Applications - 716.4 Television Systems and Equipment - 714 Electronic Components and Tubes - 921 Mathematics - 704.1 Electric Components - 701.1 Electricity: Basic Concepts and Phenomena - 632 Hydraulics, Pneumatics and Related Equipment, and Fluidics - 619 Pipes, Tanks and Accessories; Plant Engineering Generally - 704 Electric Components and Equipment
DOI: 10.3969/j.issn.1000-1298.2010.08.043
Database: Compendex 43. Accession number: 20103513195418
Title: Appearance quality grading for fresh corn ear using computer vision
Authors: Wang, Huihui1 ; Sun, Yonghai1 ; Zhang, Tingting1 ; Zhang, Guilin2 ; Li, Yi3 ; Liu, Tiepeng3
Author affiliation: 1 College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
2 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
3 Jilin Sky Scenery Food Co., Ltd., Changchun 130123, China
Corresponding author: Sun, Y. (sunyh@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 156-159 165
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: Appearance quality grading for fresh corn ear was implemented by computer vision based on HSI color model. Bare tip position was detected and removed using projection method. Defects of fresh corn ear were identified by the first order differential operation on H. Characteristic parameters of appearance quality, such as defect proportion, ear length, ear maximum diameter, aspect ratio and rectangle factor were obtained. General regression neural network with five characteristic parameters as input was developed for grading. Experiment showed that average errors of bare tip position, ear length and ear maximum diameter were 2.27mm, 1.96mm and 0.54mm, respectively. Mistake rate of defect proportion was 3.00%, and grading average ratio was up to 95.91%.
Number of references: 11
Main heading: Neural networks
Controlled terms: Aspect ratio - Computer networks - Computer vision - Defects - Grading
Uncontrolled terms: Appearance quality - Average errors - Characteristic parameter - Color models - Differential operation - Ear - First order - Fresh corn - General regression neural network - Projection method
Classification code: 951 Materials Science - 943 Mechanical and Miscellaneous Measuring Instruments - 913.3 Quality Assurance and Control - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 423 Non Mechanical Properties and Tests of Building Materials
DOI: 10.3969/j.issn.1000-1298.2010.08.032
Database: Compendex 44. Accession number: 20103513195425
Title: Influence of air velocity in heat exchanging pipes to heat change and water vapor transformation for underground heat storage system in greenhouse
Authors: Liang, Xifeng1, 2 ; Wang, Yongwei1 ; Cheng, Shaoming1 ; Wang, Jun1 ; Miao, Xiangwen1
Author affiliation: 1 School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
2 College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Corresponding author: Wang, Y. (wywzju@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 189-193 188
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The effects of the air velocity in heat exchanging pipes to heat and water vapor transformation was conducted in double-film covering greenhouse and the rational running mode was presented. The temperature and humidity in inlet and outlet of heat exchanging pipes, floor temperature in heat storage greenhouse and outside temperature were measured at different air velocities in the heat exchanging pipes. The humidity ratio, enthalpy of inlet and outlet of heat exchanging pipes and the power for heat saving were calculated. The results showed that the enthalpy of hot air decrease apparently after flowing through heat exchanging pipes when the air velocity in heat exchanging pipes was respectively 0.6m/s, 1.0m/s, 1.5m/s, 2.0m/s, 2.5m/s and 2.8m/s during heat saving in clear day. In addition, the air enthalpy difference between inlet and outlet of heat exchanging pipes and its variation tendency were similar at different air velocities. The power for heat saving enhances with the increase of the air velocity in heat exchanging pipes. The power and the increase of floor temperature held lower when the air velocity in heat exchanging pipes was less than 2m/s during heat storage. The appropriate air velocity in heat exchanging pipes was 2.5m/s to 2.8m/s, and the rational time for heat saving was 10:30 to 14:30.
Number of references: 10
Main heading: Heat exchangers
Controlled terms: Air - Enthalpy - Floors - Greenhouses - Heat storage - Pipe - Velocity - Water vapor
Uncontrolled terms: Air velocities - Double-film covering greenhouse - Enthalpy differences - Heat - Heat change - Heat exchanging - Heat saving - Hot air - Humidity ratio - Running mode - Underground heat storage
Classification code: 931.1 Mechanics - 804 Chemical Products Generally - 641 Heat and Mass Transfer; Thermodynamics - 619.1 Pipe, Piping and Pipelines - 616.1 Heat Exchange Equipment and Components - 402.1 Industrial and Agricultural Buildings - 402 Buildings and Towers
DOI: 10.3969/j.issn.1000-1298.2010.08.039
Database: Compendex 45. Accession number: 20103513195394
Title: Sowing-performance of air-suction cylindrical cotton precision dibbler
Authors: Chen, Xuegeng1 ; Lu, Yongtao1
Author affiliation: 1 Institute of Machinery and Equipment, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, China
Corresponding author: Chen, X. (chenxg130@263.net)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 41
Issue: 8
Issue date: August 2010
Publication year: 2010
Pages: 35-38
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 that the large energy consumption and unstable sowing-performance of air-suction cylindrical, orthogonal test and regression analysis were applied to research the relative pressure and suction-hole velocity that influenced the sowing-performance mainly. Variance analysis of the experiment results defined the influencing regularity and the optimization of the factors. Experimental results indicated that the sowing-performance became worse quickly with the increasing of suction-hole velocity, but became better with the increasing of relative pressure. The optimization of the two factors was the suction-hole velocity of 0.38m/s and the relative pressure of -4.5kPa. Under such working conditions, the single seed index was 98.67%, the synthetical rate of seed was 99.00%, the multiples index was 0.67%, and the miss index was 0.67%, so the seed-metering device could satisfy the demand for precision seeding.
Number of references: 9
Main heading: Seed
Controlled terms: Cotton - Energy utilization - Optimization - Regression analysis - Velocity
Uncontrolled terms: Dibbler - Energy consumption - Orthogonal test - Precision dibbler - Relative pressure - Seed-metering device - Suction-hole velocity - Variance analysis - Working conditions
Classification code: 525.3 Energy Utilization - 821.4 Agricultural Products - 921.5 Optimization Techniques - 922.2 Mathematical Statistics - 931.1 Mechanics
DOI: 10.3969/j.issn.1000-1298.2010.08.008
Database: Compendex
Compilation and indexing terms, ? 2010 Elsevier Inc.
? 2010 Elsevier Inc. All rights reserved.
|
