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    2011年第42卷第4期共收錄46篇
1. Accession number:20112214017046
 Title:Measuring sprinkler droplet size with modified flour methodology
 Authors:Bai, Geng1 ; Yan, Haijun1 ; Wang, Min1
Author affiliation:  1  College of Water Conversancy and Civil Engineering, China Agricultural University, Beijing 100083, China
 Corresponding author:Yan, H. (yanhj@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:76-80
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Flour method is extensively used in the sprinkler droplet size measurement. The traditional calibration equation only considered the relationship between dried pellet mass and droplet diameter. The effects of droplet diameter, droplet impact angle and impact velocity on dried pellet mass were discussed through the orthogonal test. The results showed that droplet size and impact angle had significant influences on dried pellet mass while droplet impact velocity had little influence. A modified calibration equation considering two factors of droplet size and impact angle was established. The modified calibration equation had high calculation accuracy compared with the traditional one. The method of measuring sprinkler droplet using the modified calibration equation was presented with the application of the droplet dynamics-evaporation model.
 Number of references:17
 Main heading:Drops
Controlled terms:Calibration  -  Pelletizing  -  Regression analysis  -  Sprinkler systems (irrigation)
Uncontrolled terms:Calculation accuracy  -  Calibration equations  -  Droplet diameters  -  Droplet impact  -  Droplet size  -  Droplet sizes  -  Flour method  -  Impact angles  -  Impact velocities  -  Orthogonal test   -  Sprinkler droplets  -  Traditional calibration
Classification code:943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  922.2 Mathematical Statistics  -  802.3 Chemical Operations  -  443.1 Atmospheric Properties  -  821.1 Agricultural Machinery and Equipment
 Database:Compendex
   
2. Accession number:20112214017048
 Title:Mechanics characteristics of cotton stalks
 Authors:Du, Xianjun1 ; Li, Yudao1 ; Yan, Shitao1 ; Li, Xiuzhi1 ; Song, Zhanhua1 ; Li, Fade1
Author affiliation:  1  Mechanical and Electrical Engineering College, Shandong Agricultural University, Taian 271018, China
 Corresponding author:Li, F. (lifade@sdau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:87-91
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:With innovation cotton 958 cotton stalks as test material, shearing, compression and bending mechanical tests of cotton stalk in harvesting period were carried out in the universal test machine. The results showed that when the sample moisture content was in 30%-50%, the compressive intensity and shear intensity at the bottom and middle of cotton stalk was lesser, the intensity value were 1.66-3.13 MPa and 0.74-1.12 MPa, respectively. Cotton stalks bending intensity decreased with its moisture content increased. The bending intensity values of samples at the bottom was 4.20-5.08 MPa. In the test of shearing, compression and bending, the consumption power of the sample was 2.98-4.32 N·m, 2.91-4.34 N·m, 1.51-4.18 N·m, respectively.
 Number of references:13
 Main heading:Cotton
Controlled terms:Bending strength  -  Bending tests  -  Compressive strength  -  Moisture  -  Moisture determination  -  Shear strength  -  Shearing
Uncontrolled terms:Cotton stalk  -  Harvesting periods  -  Intensity values  -  Mechanical tests  -  Mechanics characteristics  -  Moisture contents  -  Shear intensity  -  Test materials  -  Universal test
Classification code:421 Strength of Building Materials; Mechanical Properties  -  422 Strength of Building Materials; Test Equipment and Methods  -  604.1 Metal Cutting  -  801.4 Physical Chemistry  -  819.1 Natural Fibers  -  944.2 Moisture Measurements
 Database:Compendex
   
3. Accession number:20112214017039
 Title:Experiment and improvement on clamping cotton precision seeding dibbler
 Authors:Wang, Jikui1, 2 ; Guo, Kangquan1 ; Lü, Xinmin1 ; Fu, Wei2 ; Qi, Chusheng1
Author affiliation:  1  College of Mechanical and Electrical Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
2  College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
 Corresponding author:Guo, K. (jdgkq@nwsuaf.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:43-47
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Aiming at the seed-dropping problems of clamping cotton-seeds precision dibbler due to vibration in operating, the seeding devices of the dibbler were improved. A seed retaining equipment was designed and installed on the dibbler. Mathematical models that described relationship between the performance indexes and influence factors of the seeding devices were established by applying quadrate regression experiment with general rotary design method. The tendency and regularity of the performance indexes influenced by the factors were analyzed. For the Xinluzao-26 cotton seed, with a goal of maximum single seed index and a given range of multi-seed and missing seed index, length of the clamping boards of the seeding device's jaw were 4.50 mm, width of the jaw were 5.70 mm, and opening of the jaw was 7.50 mm by parameter optimization. The experiment results showed that the effect of operating vibration was reduced on the improved dibbler.
 Number of references:10
 Main heading:Seed
 Controlled terms:Cotton  -  Experiments  -  Mathematical models
Uncontrolled terms:Clamping  -  Dibbler  -  Improvement design  -  Influence factors  -  Parameter optimization  -  Performance indices  -  Rotary design
Classification code:821.4 Agricultural Products  -  901.3 Engineering Research  -  921 Mathematics
 Database:Compendex
   
4. Accession number:20112214017057
Title:Nondestructive examination of sugar content of intact 'Shatangju' with visible-near infrared spectroscopy based on variables selection
 Authors:Dai, Fen1 ; Hong, Tiansheng1 ; Yue, Xuejun1 ; Zhang, Kun1 ; Hong, Ya1
Author affiliation:  1  Key Laboratory of Key Technology on South Agricultural Machinery and Equipment, Ministry of Edu., South China Agricultural University, Guangzhou 510642, China
 Corresponding author:Hong, T. (tshong@scau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:133-138
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The reflectance spectra of 189 samples within 450-2500 nm were collected. Firstly, the spectra were denoised using the orthogonal wavelet functions sym8 (level was 3). And then the spectra variables were compressed to 14 variables by successive projections algorithm (SPA). The MLR model with 14 variables as inputs could result in that prediction correlation coefficient was 0.8855 and prediction root mean square error was 0.5111. Then the group of wavelengths derived from SPA was screened by their contributions to the total sugar content. After screening on contribution, the number of wavelength variables dropped to 11. Finally, the MLR, PLS and BPNN calibration models were built with 11 wavelength variables as inputs and compared. The results demonstrated that wavelength variables were decreased to 0.54% of the original variables by SPA and screening on contribution, and this could help to make the model more concise and robust.
 Number of references:12
 Main heading:Nondestructive examination
Controlled terms:Algorithms  -  Infrared devices  -  Near infrared spectroscopy  -  Orthogonal functions  -  Sugars
Uncontrolled terms:Shatangju  -  Soluble sugars  -  Successive projections algorithm  -  Visible-near infrared spectroscopy  -  Wavelet denoising
Classification code:421 Strength of Building Materials; Mechanical Properties  -  741.3 Optical Devices and Systems  -  804.1 Organic Compounds  -  921 Mathematics
 Database:Compendex
   
5. Accession number:20112214017074
 Title:Positioning control of piezoelectric macro-micro dual drive
 Authors:Liu, Dingqiang1 ; Huang, Yumei1 ; Xie, Li1 ; Yang, Yong1
Author affiliation:  1  School of Mechanical Instrumental Engineering, Xi'an University of Technology, Xi'an 710048, China
 Corresponding author:Liu, D. (liu_ding_qiang@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:220-223 233
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Based on the piezoelectric driver, a macro-micro dual drive precision positioning system was designed. The macro stage of the system was drove by servo motor. The micro stage was consisted of piezoelectric driver and flexible hinge, and drove by the former. The micro stage was mounted on the macro stage and showed a series connection. The macro stage and micro stage were used to realize large workspace and compensate the error of position, respectively. With the open serve control of motion control card, the control system of macro motion and micro motion was harmonized. The positioning feedback was realized by two high precision optical grating. The precision detection was completed by laser interferometer. In the whole closed loop control system, the micro stage compensated the position error when the macro stage finished moving. Experiment results showed that within the travel range of 100 mm, the position error in every millimeter was less than ±100 nm.
 Number of references:10
 Main heading:Piezoelectricity
Controlled terms:Closed loop control systems  -  Control systems  -  Feedback  -  Interferometers  -  Laser interferometry
Uncontrolled terms:Dual drives  -  Flexible hinges  -  High precision  -  Large workspace  -  Laser interferometer  -  Micro motion  -  Motion control card  -  Optical grating  -  Piezoelectric drivers  -  Position errors   -  Positioning control  -  Positioning coordination control  -  Precision positioning systems  -  Series connections
Classification code:701.1 Electricity: Basic Concepts and Phenomena  -  731.1 Control Systems  -  941.3 Optical Instruments  -  941.4 Optical Variables Measurements
 Database:Compendex
   
6. Accession number:20112214017075
 Title:Thermal diffusion and thermal melting in femtosecond laser micromachining
 Authors:Miao, Enming1 ; Chen, Suxin2 ; Niu, Pengcheng1 ; Yan, Yan1 ; Fei, Yetai1
Author affiliation:  1  School of Instrument and Opto-Electronics Engineering, Hefei University of Technology, Hefei 230009, China
2  School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
 Corresponding author:Miao, E. (miaoem@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:224-228
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Diameters of morphology zones of crater processed by femtosecond laser were measured in the range of laser fluence from 0.108 J/cm2 to 28.68 J/cm2. Thermal melting on the surface of a hole and the heat conduction rule were studied. The melting zones were calculated according to the traditional thermal conduction formula. The calculated results matched with the experiment results very well. It suggested that the thermal diffusion in super power femtosecond laser micromachining was inevitable. Besides, reasonable parameters were acquired for the better quality of the micro-holes.
 Number of references:11
 Main heading:Ultrashort pulses
Controlled terms:Composite micromechanics  -  Heat conduction  -  Melting  -  Micromachining  -  Thermal diffusion  -  Thermal diffusion in liquids
Uncontrolled terms:Femto-second laser  -  Femtosecond laser micromachining  -  Laser fluence  -  Laser fluences  -  Melting zones  -  Micro holes  -  Thermal conduction  -  Thermal melting
Classification code:531.1 Metallurgy  -  604.2 Machining Operations  -  641.2 Heat Transfer  -  744.1 Lasers, General  -  931.1 Mechanics
 Database:Compendex
   
7. Accession number:20112214017051
 Title:Characteristics of co-digestion of pig dung and wheat straw in various ratios
 Authors:Chu, Lili1 ; Li, Yibing2 ; Feng, Yongzhong2 ; Yang, Gaihe2 ; Ren, Guangxin2
Author affiliation:  1  College of Forestry, Northwest A and F University, Yangling, Shaanxi 712100, China
2  College of Agronomy, Northwest A and F University, Yangling, Shaanxi 712100, China
 Corresponding author:Li, Y. (liyibing@nwsuaf.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:100-104
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Pig dung and wheat straw (the ratio of pig dung to wheat straw was 1:1, 2:1, 3:1) were used as fermentation materials. The experiments were carried out at 35°C. The biogas production rate, cumulative biogas yield, methane content, material reduction, pH value and NH3-N content were tested. The results showed that the co-digestion of pig dung to wheat straw could increase the biogas yield and material reduction of wheat straw. The biogas production yield of 1:1 was highest (383.0 mL/g), which was 1.6 times of biogas production yield of wheat straw (231.8 mL/g). VS reductions of combination materials were 12.0%-26.9% higher than wheat straw. Compared with wheat straw, the NH3-N contents of combination materials increased by 35.6%-64.8%. Reasonable co-digestion ratio of livestock dung and crop straw could increase the biogas production rate and utilization of crop straw.
 Number of references:21
 Main heading:Mammals
Controlled terms:Biogas  -  Crops  -  Materials  -  Methanation  -  Methane  -  Production
Uncontrolled terms:Biogas production  -  Codigestion  -  Methane content  -  N content  -  pH value  -  Pig dung  -  Wheat straw  -  Wheat straws
Classification code:522 Gas Fuels  -  802.2 Chemical Reactions  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  821.4 Agricultural Products  -  913.2 Production Control  -  951 Materials Science
 Database:Compendex
   
8. Accession number:20112214017038
 Title:Effects comparison on fractal characterization for soil surface roughness
 Authors:Hou, Zhanfeng1 ; Li, Lin1 ; Chen, Zhi1 ; Wu, Pei1 ; Han, Jinyu1
Author affiliation:  1  School of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
 Corresponding author:Han, J. (hjyhjzfq@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:39-42
 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:Fractal characterization is an effective way to investigate the soil surface roughness. An appropriate fractal dimension computation method is critical to obtain the accurate results. Four methods commonly used for computing the fractal dimensions were evaluated by using the W-M fractal profile curves. The results showed that the mean-root-square method had the highest accuracy in describing the soil surface roughness with fractal dimension between 1.2 and 1.6, it had a good adaptability in characterizing the real measured soil surface roughness. Based on the fact that the mean-root-square difference of surface roughness was proportional to the section scale, the mean-root-square method was improved. Compared with the theoretical curves, the new method showed a higher accuracy and provided a new method for describing the complex characteristics of soil roughness.
 Number of references:15
 Main heading:Surface roughness
Controlled terms:Fractal dimension  -  Initiators (chemical)  -  Partial discharges  -  Soils  -  Surface properties
Uncontrolled terms:Complex characteristics  -  Computation methods  -  Fractal characterization  -  Fractal profiles  -  Roughness  -  Soil roughness  -  Soil surfaces
Classification code:483.1 Soils and Soil Mechanics  -  701.1 Electricity: Basic Concepts and Phenomena  -  803 Chemical Agents and Basic Industrial Chemicals  -  921 Mathematics  -  931.2 Physical Properties of Gases, Liquids and Solids
 Database:Compendex
   
9. Accession number:20112214017054
 Title:Effects of UV-C irradiation to antioxidants of postharvest tomato during storage
 Authors:Liu, Changhong1 ; Lu, Xianying1 ; Cai, Luyun1 ; Han, Xiaoxu1 ; Ying, Tiejin1
Author affiliation:  1  School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
 Corresponding author:Ying, T. (yingtiejin22@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:116-119 126
 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 4 kJ/m2 UV-C irradiation on main qualities and antioxidants of tomato during storage were investigated. The experimental results indicated that 4 kJ/m2 UV-C irradiation maintained a high level of firmness and delayed the color development, significantly promoted the accumulation of phenolics, flavonoids and lycopene, increased the antioxidant enzyme activities of CAT, SOD, APX and GR, consequently showed higher antioxidant ability during storage. The results suggested that UV-C irradiation had the potential to apply on extending the shelf life and enhancing antioxidants of tomato fruit.
 Number of references:16
 Main heading:Fruits
 Controlled terms:Irradiation  -  Phenols
Uncontrolled terms:Antioxidant enzyme activity  -  Antioxidants  -  Color development  -  Lycopenes  -  Phenolics  -  Postharvest  -  Shelf life  -  Storage  -  Tomato  -  Tomato fruits   -  UV-C
Classification code: 711.1 Electromagnetic Waves in Different Media  -  804.1 Organic Compounds  -  821.4 Agricultural Products
 Database:Compendex
   
10. Accession number:20112214017042
 Title:Finite element analysis of clod crushing rake tooth in field cleaning machine
Authors:Wang, Xufeng1 ; Zhang, Xuejun2 ; Ma, Shaohui1 ; Zhang, Hong1 ; Wang, Wei1 ; Liang, Jianlong1
Author affiliation:  1  College of Mechanical and Electronic Engineering, Tarim University, Alar 843300, China
2  College of Mechanical and Traffic, Xinjiang Agricultural University, Urumqi 830052, China
 Corresponding author:Zhang, X. (zhxjau@sina.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:58-61
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A finite element analysis model of the clod crushing rake tooth in field cleaning machine was built by the non-linear finite element analysis method. Based on the analysis of strength and rigidity, the bearing forces and distortion of the rake tooth in work were predicted. Compared with the simulation results, the prediction results calculated by finite element analysis model showed confident with the simulation results and reliable in the design and assessment of rake tooth.
 Number of references:15
 Main heading:Finite element method
 Controlled terms:Cleaning  -  Computer simulation  -  Crushing
Uncontrolled terms:Bearing forces  -  Cleaning machine  -  Clod-crushing  -  Field cleaning machine  -  Finite element analysis  -  Finite element analysis model  -  In-field  -  Non-linear finite element  -  Non-linear finite-element analysis  -  Simulation result
Classification code:723.5 Computer Applications  -  802.3 Chemical Operations  -  921.6 Numerical Methods
 Database:Compendex
   
11. Accession number:20112214017065
 Title:Yield and biomass prediction testing of AquaCrop model for winter wheat
Authors:Du, Wenyong1 ; He, Xiongkui1 ; Shamaila, Z.2 ; Hu, Zhenfang1 ; Zeng, Aijun3 ; Muller, J.2
Author affiliation:  1  College of Engineering, China Agricultural University, Beijing 100083, China
2  Institute of Agricultural Engineering (440), University of Hohenheim, Stuttgart 70599, Germany
3  College of Science, China Agricultural University, Beijing 100094, China
 Corresponding author:He, X. (xiongkui@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:174-178 183
 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:Using the winter wheat in North China as research object, AquaCrop model was applied in different technology of irrigation, included drip irrigation, sprinkler irrigation and furrow irrigation. The main parameters like soil and crop characteristics and so on, were adjusted. In addition, the effective simulation method for crop yield and biomass was researched. The study showed that some simulated values like yield and biomass of soil were significative. The relative error (RE) was low. Simulated data was a little higher than the observed one. All of the modeling efficiency (EF) was more than 0.95. The modeling was better for yield than that for biomass. The modeling was also the most efficient for drip irrigation in the three kind of irrigation technology.
 Number of references:18
 Main heading:Biomass
 Controlled terms:Crops  -  Sprinkler systems (irrigation)
Uncontrolled terms:AquaCrop model  -  Crop yield  -  Drip irrigation  -  Furrow irrigation  -  Main parameters  -  North China  -  Prediction  -  Relative errors  -  Research object  -  Simulated data   -  Simulation methods  -  Sprinkler irrigation  -  Winter wheat  -  Yield
 Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control
 Database:Compendex
   
12. Accession number:20112214017062
 Title:Detection and identification for disease stress tomato acoustic emission signal
 Authors:Wang, Xiuqing1 ; Zhang, Chunxia1 ; Yang, Shifeng1
Author affiliation:  1  College of Electronics Information and Automation, Tianjin University of Science and Technology, Tianjin 300222, China
 Corresponding author:Wang, X. (lwxqly@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:159-162
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Acoustic emission (AE) signals of tomato plants were collected with AE signal detecting system. The collected data were processed and analyzed by using the upper machine software. By statistical analysis on changing of AE signal count with tomato late blight disease stress level, it was concluded that the plants with AE signal would not occur in physiological cycle like healthy plants. In the prophase of blight disease, the AE signal frequency dramatically increased, but decreased slowly in the crop disease progress. The multi-peak phenomenon emerged. Then, noise source location could be identified with time difference between two sensors and changing frequency distribution between different signals.
 Number of references:12
 Main heading:Signal detection
 Controlled terms:Acoustic emissions  -  Fruits
Uncontrolled terms:Acoustic emission signal  -  Acoustic emission source identification  -  AE signals  -  Crop disease  -  Detecting systems  -  Frequency distributions  -  Late blight  -  Machine software  -  Noise source  -  Statistical analysis   -  Stress levels  -  Time-differences  -  Tomato  -  Tomato plants
Classification code:716.1 Information Theory and Signal Processing  -  751.2 Acoustic Properties of Materials  -  821.4 Agricultural Products
 Database:Compendex
   
13. Accession number:20112214017056
Title:Optimization of enzymatic conversion of flavonoids extracted from sea buckthorn leaves
Authors:Feng, Shuhuan1 ; Yin, Lijun1 ; Yuan, Rui1 ; Satoru, Nirasawa2 ; Li, Gang3 ; Cheng, Yongqiang1
Author affiliation:  1  College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
2  Japan International Research Center for Agricultural Sciences, Tsukuba 305-8686, Japan
3  Qinghai General Health Bio-Science Co. Ltd., Xining 810003, China
 Corresponding author:Cheng, Y. (chengyq@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:127-132 138
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to increase the yield of sea buckthorn leaves flavonoid aglycones converted from flavonoid glycosides by the enzyme-Pectinex Ultra SP-L, on the basis of single-factor test, response surface analysis method was used. Hydrolysis time, hydrolysis temperature and pH value were chosen to be independent variables. The value of flavonoid aglycones quality was regarded as the response value. The results showed that the hydrolysis time was a significant effect factor and hydrolysis temperature and pH value had no significant impact. The optimum conditions for enzymatic conversion were hydrolysis temperature of 50.8°C, pH value of 5.16, hydrolysis time of 2.5 h. Under those conditions, the total aglycones quality obtained from 15 mg sea buckthorn leaf extract was 0.1801 mg and the conversion rate to flavonoids aglycones was 62%.
 Number of references:6
 Main heading:Enzymatic hydrolysis
 Controlled terms:pH effects  -  Sugars  -  Surface analysis
Uncontrolled terms:Aglycones  -  Conversion rates  -  Effect factors  -  Enzymatic conversions  -  Flavonoid glycosides  -  Independent variables  -  Leaf extracts  -  Optimum conditions  -  Pectinex Ultra SP-L  -  pH value   -  Response surface  -  Response surface analysis methods  -  Sea buckthorn  -  Significant impacts
Classification code:423 Non Mechanical Properties and Tests of Building Materials  -  801.1 Chemistry, General  -  804.1 Organic Compounds  -  951 Materials Science
 Database:Compendex
   
14. Accession number:20112214017066
 Title:Weed control system for variable target spraying based on fuzzy control
Authors:Yin, Dongfu1 ; Chen, Shuren1 ; Mao, Hanping1 ; Yin, Jianjun2 ; Wei, Xinhua2 ; Pei, Wenchao2
Author affiliation:  1  Key Lab. of Modern Agricultural Equipment and Technol., Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
2  High-Tech. Key Laboratory of Agricultural Equipment and Intelligentization of Jiangsu Province, Jiangsu University, Zhenjiang 212013, 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:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:179-183
 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:In order to reduce herbicide dosage and automatic precise weeding in cotton fields, a variable target weed spraying system uses fuzzy control algorithm with processor core of S3C2410 was designed. This system achieved automatic weeds identification, system speed and flow information collection, flow and pressure adjustment and other functions. A dual-input single-output fuzzy controller was designed and simulated. Simulation results showed that the controller could control the amount of spraying with the speed and density in real-time changed. An indoor test bed which could simulate cotton environment was built and the spraying system was tested. The results showed that over 90% weeds were sprayed with speed of 0.2 m/s.
 Number of references:10
 Main heading:Weed control
Controlled terms:Algorithms  -  Controllers  -  Cotton  -  Environmental testing  -  Equipment testing  -  Fuzzy control  -  Herbicides  -  Identification (control systems)
Uncontrolled terms:Dual input single outputs  -  Flow informations  -  Fuzzy control algorithms  -  Fuzzy controllers  -  Indoor test  -  Processor cores  -  S3C2410  -  Simulation result  -  Spraying system  -  Weed identification
Classification code:943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  921 Mathematics  -  819.1 Natural Fibers  -  944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  803 Chemical Agents and Basic Industrial Chemicals  -  731.1 Control Systems  -  731 Automatic Control Principles and Applications  -  723 Computer Software, Data Handling and Applications  -  454 Environmental Engineering  -  732.1 Control Equipment
 Database:Compendex
   
15. Accession number:20112214017050
Title:Comparison of bubbling fluidized bed and circulating fluidized bed in gasification of biomass
 Authors:Fan, Xiaoxu1 ; Xian, Jianwei2 ; Chu, Leizhe1 ; Yang, Liguo1
Author affiliation:  1  Key Laboratory for Biomass Gasification Technology of Shandong Province, Ji'nan 250014, China
2  School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, China
 Corresponding author:Fan, X. (fan_xiaoxu@sina.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:96-99
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The results from biomass gasification in a pilot-scale (6 m tall×0.2 m internal diameter) air-blown circulating fluidized bed gasifier was tested and compared with bubbling fluidized bed gasifier. The results showed that the diameters of bed material in bubbling fluidized bed and circulating fluidized bed were different. The bubbling fluidized bed had a dense zone and bed material was homogeneous distribution in circulating fluidized bed. The temperature of the circulating fluidized bed was more uniform than bubbling fluidized bed. The carbon conversion rate, gasification efficiency and low gas heat value of circulating fluidized bed were larger than that of bubbling fluidized bed gasifier.
 Number of references:12
 Main heading:Fluidization
Controlled terms:Biomass  -  Bubble formation  -  Fluidized bed process  -  Fluidized beds  -  Gasification
Uncontrolled terms:Bed materials  -  Biomass Gasification  -  Bubbling fluidized bed  -  Carbon conversion rate  -  Circulating fluid bed  -  Circulating fluidized bed  -  Dense zones  -  Gasification efficiency  -  Heat value  -  Homogeneous distribution   -  Internal diameters  -  Pilot scale
Classification code:525.1 Energy Resources and Renewable Energy Issues  -  533.1 Ore Treatment  -  802.1 Chemical Plants and Equipment  -  802.3 Chemical Operations  -  931.1 Mechanics
 Database:Compendex
   
16. Accession number:20112214017033
 Title:Test-bed of power shift transmission for large-scale tractor
Authors:Zhu, Sihong1 ; Zhu, Yonggang1 ; Zhu, Xingxing1 ; Deng, Xiaoting1 ; He, Hualin2 ; Gao, Huisong1
Author affiliation:  1  College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
　　　　　　　　　　2  Changfa Group, Changzhou 213000, China
 Corresponding author:Zhu, S. (zhusihong@njau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:13-16 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:According to the testing requirements of tractor power shift transmission, a power shift transmission test bed for large-scale tractor was designed. The power shift transmission, drive motor, loading motor and energy feedback system were designed. The electronic control unit and electronic measurement system were developed. The overall scheme of tests for power shift transmission was determined and tested. The test results showed that the power of proposed test bed was up to 250 kW. A closed-loop feedback of energy was achieved thus energy-saving rate in overload operating conditions reached to 80%. The input speed and torque, output speed and torque, hydraulic system flow and pressure could be tested with the system. The test bed was operated steadily and could meet the design requirements.
 Number of references:5
 Main heading:Automobile testing
Controlled terms:Control  -  Hydraulic equipment  -  Power electronics  -  Test facilities  -  Testing  -  Tractors (agricultural)  -  Tractors (truck)
Uncontrolled terms:Closed-loop feedback  -  Design requirements  -  Drive motors  -  Electronic control units  -  Electronic measurements  -  Energy saving  -  Feedback systems  -  Hydraulic system  -  Operating condition  -  Power shift   -  Power shift transmission  -  Test results  -  Testing requirements  -  Tractor
Classification code:732 Control Devices  -  731 Automatic Control Principles and Applications  -  715.2 Industrial Electronic Equipment  -  663.1 Heavy Duty Motor Vehicles  -  663 Buses, Tractors and Trucks  -  662 Automobiles and Smaller Vehicles  -  632.2 Hydraulic Equipment and Machinery  -  423.2 Non Mechanical Properties of Building Materials: Test Methods  -  402.1 Industrial and Agricultural Buildings
 Database:Compendex
   
17. Accession number:20112214017049
Title:Design and experiment of piecewise arc-shaped screen on hammer mill to grinding performance
Authors:Tian, Haiqing1 ; Qu, Fengfu1 ; Liu, Weifeng1 ; Han, Baosheng1 ; Wang, Chunguang1
Author affiliation:  1  College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
 Corresponding author:Liu, W. (lwf1955@eyoo.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:92-95
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Based on the fact that corn circulation layer affects the grading performance in the working process of the hammer mill, piecewise arc-shaped screens were designed for substituting the circular-shaped screen. In order to improve the grading performance of hammer mill, the space between the hammer and screen was changed repeatedly, and the corn circulation layer was destroyed. 15 kinds of piecewise arc-shaped screens were designed for the 4KB hammer mill. The experimental study indicated that the hammer mill with the screen piecewise arc radius of 76 mm and the space between arcs of 97 mm had the highest production efficiency. Compared with flat circular-shaped screen, the production efficiency and power output in every kW·h increased by 29.8% and 26.6%, respectively. The over grading phenomenon was improved. Particle size of the corn was uniform and the temperature rise of the corn was decreased.
 Number of references:7
 Main heading:Hammers
Controlled terms:Grinding (comminution)  -  Grinding (machining)  -  Grinding mills  -  Tools
Uncontrolled terms:Arc radius  -  Experimental studies  -  Grinding performance  -  Hammer mill  -  Hammermills  -  Piece-wise  -  Power out put  -  Production efficiency  -  Screen  -  Space between   -  Temperature rise  -  Working process
Classification code:802.3 Chemical Operations  -  802.1 Chemical Plants and Equipment  -  606.2 Abrasive Devices and Processes  -  605.2 Small Tools, Unpowered  -  605 Small Tools and Hardware  -  603.1 Machine Tools, General  -  603 Machine Tools
 Database:Compendex
   
18. Accession number:20112214017063
 Title:Geometric modeling of tobacco flower
Authors:Wang, Yunyun1 ; Wen, Weiliang1 ; Guo, Xinyu1 ; Zhao, Guohui2 ; Lu, Shenglian1 ; Xiao, Boxiang1
Author affiliation:  1  Key Laboratory for Information Technology in Agriculture, Ministry of Agriculture, National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
2  School of Mathematical Sciences, Dalian University of Technology, Dalian 116024, China
 Corresponding author:Guo, X. (guoxy@nercita.org.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:163-167 173
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai,              Beijing, 100083, China
Abstract:In order to realize the geometric modeling of plant flowers of crown united, taking tobacco flower as an example, a flower modeling method based on ball B-spline curve and parametric surface was proposed. Morphological characters were analyzed. Firstly, 3-D shape of each parts with mathematics were described and the control parameters were get. And then, visualization of them with relative color and topology information were realized. The results showed that proposed method could effectively simulate tobacco flower with good controllability. The models showed more reality, which provided a new technique for explicit modeling of other similar flowers.
 Number of references:13
 Main heading:Three dimensional
Controlled terms:Curve fitting  -  Geometry  -  Parametric devices  -  Splines  -  Tobacco  -  Visualization
Uncontrolled terms:3-D shape  -  Ball B-spline  -  Control parameters  -  Explicit modeling  -  Geometric modeling  -  Modeling method  -  Parametric surfaces  -  Relative color  -  Topology information
Classification code:601.2 Machine Components  -  714 Electronic Components and Tubes  -  821.4 Agricultural Products  -  902.1 Engineering Graphics  -  921 Mathematics
 Database:Compendex
   
19. Accession number:20112214017064
Title:Feature selection for cotton foreign fiber objects based on improved ant colony algorithm
Authors:Zhao, Xuehua1 ; Li, Daoliang2 ; Yang, Wenzhu3 ; Chen, Guifen1 ; Yu, Helong1 ; Zhang, Xin4
Author affiliation:  1  College of Information and Technology Science, Jilin Agricultural University, Changchun 130118, China
2  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
3  College of Mathematics and Computer Science, Hebei University, Baoding 071002, China
4  College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
 Corresponding author:Li, D. (dliangl@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:168-173
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:An optimal feature subset selection method based on improved ant colony algorithm was presented. The initial probability of the feature was related to the ability of classification of the separate feature, which was advantageous to reduce the redundancy and the hunting zone of the optimized algorithm at the same time. Section variation of the feature set avoided local convergence. Experimental results indicated that the proposed algorithm further reduced the search time, got a smaller subset of the optimal feature set of cotton fibers and better classification performance. The classification accuracy rate increased from 84% to 93%.
 Number of references:16
 Main heading:Algorithms
Controlled terms:Cotton  -  Cotton fibers  -  Feature extraction  -  Image processing  -  Optimization
Uncontrolled terms:Ant colony algorithms  -  Classification accuracy  -  Classification performance  -  Feature selection  -  Feature sets  -  Feature subset selection  -  Foreign fiber  -  Improved ant colony algorithm  -  Local Convergence  -  Objects-based   -  Optimized algorithms  -  Search time
Classification code:716 Telecommunication; Radar, Radio and Television  -  723 Computer Software, Data Handling and Applications  -  741 Light, Optics and Optical Devices  -  819.1 Natural Fibers  -  921 Mathematics  -  921.5 Optimization Techniques
 Database:Compendex
   
20. Accession number:20112214017073
　　Title:Optimal allcocation of tolerance based on Jacobian-torsor theory
 Authors:Zhang, Weimin1 ; Li, Guowei1 ; Chen, Can1
Author affiliation:  1  College of Mechanical Engineering, Tongji University, Shanghai 200092, China
 Corresponding author:Zhang, W. (wmzhang@online.sh.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:216-219 228
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To solve assembly optimal tolerance allocation for composite dimensional and geometric tolerances on the basis of Jacobian-torsor tolerance model, a nonlinear optimal tolerance allocation model was established aiming to minimize the total manufacturing cost. First, the accumulated assembly error was calculated based on spatial dimension chains propagation in tolerance model. The assembly functional requirement was regarded as constraints of optimization model. Optimal dimensional and geometric tolerances could be obtained by genetic algorithm. A gear pump assembly was used as a typical example for testing the proposed method. The obtained results were guaranteed to minimize processing costs while satisfying the product assembly quality at the same time.
 Number of references:12
 Main heading:Fits and tolerances
 Controlled terms:Assembly  -  Genetic algorithms  -  Geometry  -  Optimization
Uncontrolled terms:Assembly error  -  Dimensional tolerance  -  Functional requirement  -  Geometric tolerance  -  Jacobian-torsor  -  Manufacturing cost  -  Nonlinear optimal  -  Optimal tolerance allocation  -  Optimization models  -  Processing costs   -  Product assembly  -  Spatial dimension  -  Tolerance models  -  Tolerance optimal allocation
Classification code:601 Mechanical Design  -  913.1 Production Engineering  -  921 Mathematics  -  921.5 Optimization Techniques
 Database:Compendex
   
21. Accession number:20112214017061
Title:Object-oriented classification approach for remote sensing imagery information extraction in loess hilly-gully region
 Authors:Mai, Kaile1 ; Zhang, Wenhui1
Author affiliation:  1  Key Laboratory of Environment and Ecology of Western China, Ministry of Education, Northwest A and F University, Yangling, Shaanxi 712100, China
 Corresponding author:Zhang, W. (zwhckh@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:153-158
 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 object-oriented classification approach was employed in loess hilly-gully region. Taking typical watershed Yan'gou as example, ALOS satellite images were used. The object-oriented multi-segmentation was carried out with multi-spectral, panchromatic imagery, auxiliary data of digital evaluation model (DEM) and the normalized difference vegetation index (NDVI). The land-use categories closely related to ecosystem restoration, farming and living, such as forest, grass, farmland, orchard, settlement and water, were classified with thresholds. The classification results had promising accuracies, and the overall classification accuracy was 77.73%.
 Number of references:18
 Main heading:Information analysis
　　Controlled terms:Conservation  -  Remote sensing  -  Vegetation
Uncontrolled terms:Auxiliary data  -  Classification accuracy  -  Classification results  -  Digital evaluation models  -  Ecosystem restoration  -  Information Extraction  -  Loess hilly-gully region  -  Multi-segmentation  -  Multi-spectral  -  Normalized difference vegetation index   -  Object oriented  -  Object oriented classification  -  Remote sensing imagery  -  Satellite images
Classification code:454 Environmental Engineering  -  731.1 Control Systems  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  903.1 Information Sources and Analysis
 Database:Compendex
   
22. Accession number:20112214017037
 Title:Blades design method of hydrodynamic components with flexible flat circular circle
 Authors:Wei, Wei1 ; Liu, Cheng2 ; Yan, Qingdong2
Author affiliation:  1  National Key Lab. of Vehicular Transmission, Beijing Institute of Technology, Beijing 100081, China
2  School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
 Corresponding author:Wei, W. (weiweimails@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:33-38
 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 improve power density of vehicular hydrodynamic transmission components, with the aspect of structure design of cascade system, a blades design method for flat circular circle was put forward. Based on the analysis of constraint conditions and design streamline of traditional circular circle, the flatness ratio could be changed from 0.31 to 0.19 with only three parameters of effective diameter D, minimum diameter d0 and width limit Wlim. Besides, the program was rapid and convenient. Compared with traditional hydrodynamic components, the working volume obtained by flexible flat circular circle could be compressed to 40.9% with the same maximum diameter D and minimum diameter d0. The power density of hydrodynamic components was improved effectively and meanwhile traditional circular circle design method was simplified distinctly.
 Number of references:12
 Main heading:Design
 Controlled terms:Hydraulic torque converters  -  Hydrodynamics
Uncontrolled terms:Cascade systems  -  Constraint conditions  -  Design method  -  Effective diameter  -  Flat circular circle  -  Flatness ratios  -  Hydrodynamic component  -  Hydrodynamic torque converter  -  Hydrodynamic transmission  -  Power densities   -  Power density  -  Structure design  -  Three parameters  -  Working volume
Classification code:408 Structural Design  -  602 Mechanical Drives and Transmissions  -  631.2 Hydrodynamics
 Database:Compendex
   
23. Accession number:20112214017044
 Title:Droplets movement characteristics in atomization process of flat fan nozzle
 Authors:Zhang, Jing1 ; Song, Jianli1 ; He, Xiongkui1 ; Zeng, Aijun1 ; Liu, Yajia1
Author affiliation:  1  College of Science, China Agricultural University, Beijing 100193, China
 Corresponding author:Song, J. (songjianli170@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:66-69 75
 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 droplets velocity in spraying fan of flat fan nozzle LU120-03 was tested by phase Doppler particle analyzer (PDPA). The initial velocity was liquid-sheet velocity and the velocity distribution in spraying fan was confirmed. The results showed that the velocity of minimum droplets in spraying fan edge was lower than that in central position near the nozzle, so it was more likely to drift; the fine droplets velocity decreased rapidly far away from the nozzle so that the droplets were very easy to result in drift influenced by airflow.
 Number of references:16
 Main heading:Spray nozzles
Controlled terms:Atomization  -  Drop formation  -  Two phase flow  -  Velocity  -  Velocity distribution
Uncontrolled terms:Atomization process  -  Droplets  -  Flat fan nozzle  -  Initial velocities  -  Movement characteristics  -  Phase Doppler particle analyzer
Classification code:631.1 Fluid Flow, General  -  802.3 Chemical Operations  -  931 Classical Physics; Quantum Theory; Relativity
 Database:Compendex
   
24. Accession number:20112214017070
 Title:Geometric design of involute internal gear pair with few teeth difference
 Authors:Wang, Guangjian1 ; Jiang, Hanjun1 ; Chu, Zhigang1
Author affiliation: 1  State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
 Corresponding author:Wang, G. (gjwang@cqu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:201-205 200
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Based on the different geometric design and calculation of involute internal gear pair, the calculation methods and applicability of involute internal gear pair with few teeth difference were presented when using different processing methods, including hobbing, gear shaper and wire cut EDM, and different top gaps. The influenced factors such as modification coefficient, engaging angle, contact ratio and the interference of tooth profiles were investigated via different calculation methods of addendum circle diameter. To meet the constraints of contact ratio and tooth profile interference, modification coefficient and the minimum angle of engagement were obtained by using Newton's iterative method through different calculation methods of addendum circle diameter. The calculation results indicated that under the restrictive conditions of contact ratio and tooth profile interference, regardless of hobbing or gear shaping process, angle of engagement and modification coefficient of the top gap of mixed mode of involute internal gear pair with few teeth difference were smaller when obtaining the minimum engaging angle.
 Number of references:13
 Main heading:Gear teeth
 Controlled terms:Machining
Uncontrolled terms:Addendum circle  -  Calculation methods  -  Contact ratio  -  Engaging angle  -  Few teeth difference  -  Geometric design  -  Hobbing  -  Internal gear  -  Internal gear pair  -  Mixed mode   -  Modification coefficient  -  Processing method  -  Restrictive conditions  -  Shaping process  -  Tooth profile
 Classification code:601.2 Machine Components  -  604.2 Machining Operations
 Database:Compendex
   
25. Accession number:20112214017040
Title:Kinematic analysis and optimization of transplanting mechanism with deformable elliptic gears transmission
 Authors:Zhao, Yun1 ; Huang, Juming1 ; Zhang, Guofeng1 ; Zhao, Xiong1
Author affiliation: 1  School of Machine Engineering and Automation, Zhejiang Sci.-Technol. University, Hangzhou 310018, China
 Corresponding author:Zhao, Y. (zhaoyunzstu@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:48-52 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:With the transmission characteristics of non-uniform velocity transmission and the wide range of transmission ratio for deformable elliptical gears, a new type of rotary transplanting mechanism was designed. It was used as the main transmission part of the transplanting mechanism. The new transplanting mechanism could develop the narrower plant hole so that upright growth of rice seedlings could be ensured. Secondly, the work principle of the proposed mechanism was analyzed and the kinematic model was established. Dynamic simulation and parameter optimization software were developed with VB language. The optimized parameters, optimized objections and main structure parameters were displayed in this software. Meanwhile, the optimized results were digitized. By the interaction in human-computer, the best structural parameters were obtained to satisfy the work requirement of the rice transplanter.
 Number of references:8
 Main heading:Gears
Controlled terms:Computer simulation  -  Computer simulation languages  -  Computer software  -  Deformation  -  Gear pumps  -  Human computer interaction  -  Kinematics  -  Optimization
Uncontrolled terms:Deformable elliptic gears transmission  -  Dynamic simulation  -  Elliptic gears  -  Elliptical gears  -  Human-computer  -  Kinematic Analysis  -  Kinematic model  -  Main structure  -  Optimized parameter  -  Parameter optimization   -  Rice seedlings  -  Rice transplanter  -  Rotary transplanting mechanism  -  Structural parameter  -  Transmission characteristics  -  Transmission parts  -  Transmission ratios  -  Work principle  -  Work requirements
Classification code:921.5 Optimization Techniques  -  723 Computer Software, Data Handling and Applications  -  618.2 Pumps  -  931.1 Mechanics  -  601.2 Machine Components  -  422 Strength of Building Materials; Test Equipment and Methods  -  421 Strength of Building Materials; Mechanical Properties  -  461.4 Ergonomics and Human Factors Engineering
 Database:Compendex
   
26. Accession number:20112214017068
Title:Solution region analysis and synthesis method of straight line mechanism under special configuration
 Authors:Yin, Lairong1 ; Han, Jianyou1
Author affiliation: 1  School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
 Corresponding author:Yin, L. (yinlairong@hotmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:190-194
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The curvature stagnation point curve would degenerate in two straight lines, when the given Ball point was located on the fixed bar and an instantaneous center coincided with a fixed pivot. A random bar laid on the vertical straight line would produce an approximate straight line mechanism. The synthesis formulae and figures of crank linkages solution region on the coordinate plane, based on crank linkages analysis, were presented. Some useful conclusions were obtained by analyzing special points in the solution regions. According to different design demands, the corresponding evaluating functions were adopted in order to calculate the feasible solution region and the optimal mechanism solution automatically. The proposed method was visual and automatic. Both the blindness of choosing optimal mechanism and the lowness of design efficiency were overcome observably.
 Number of references:10
 Main heading:Optimization
Uncontrolled terms:Coordinate plane  -  Design demands  -  Design efficiency  -  Feasible solution  -  Fixed pivot  -  Optimal mechanism  -  Region analysis  -  Special points  -  Stagnation points  -  Straight line mechanism   -  Straight lines  -  Straight-line mechanisms  -  Synthesis  -  Vertical straight lines
 Classification code:921.5 Optimization Techniques
 Database:Compendex
   
27. Accession number:20112214017059
Title:Wavelet packet denoising method of gas sensor array signals for detecting organophosphorus pesticides in vegetables
 Authors:Yin, Yong1 ; Zhou, Qiuxiang1 ; Yu, Huichun1 ; Xiao, Tao1
Author affiliation: 1  School of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003, China
 Corresponding author:Yin, Y. (yinyong@mail.haust.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:144-147
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:For the white noise always embeds in signals of gas sensor array, there must be bad influence on the accuracy and reliability of test results while micro or trace organophosphorus pesticide residues in vegetables detection. To solve the problem, acephate and phoxim were selected as test object. A denoising method of gas sensor array signals based on wavelet packet decomposition and reconstruction was practiced. With the help of principal component analysis (PCA) and Fisher discriminant analysis (FDA), the identification results of different concentrations corresponding to the two kinds of pesticide residues were explored and compared, respectively. The results showed that the different concentrations samples corresponding to acephate and phoxim were all well discriminated after the gas sensor array signals treated by the wavelet packet denoising. Therefore, the wavelet packet denoising method could improve identification effect of pesticide residues in vegetables using gas sensor array.
 Number of references:8
 Main heading:Chemical sensors
Controlled terms:Discriminant analysis  -  Fisher information matrix  -  Gas detectors  -  Gases  -  Noise pollution control  -  Pesticide effects  -  Principal component analysis  -  Sensor arrays  -  Signal detection  -  Vegetables   -  Wavelet analysis  -  Wavelet decomposition  -  White noise
Uncontrolled terms:De-noising  -  Denoising methods  -  Fisher discriminant analysis  -  Gas sensor array  -  Gas sensor arrays  -  Organophosphorus pesticide  -  Pesticide residue  -  Pesticide residues  -  Test object  -  Test results   -  Wavelet packet  -  Wavelet Packet Decomposition
Classification code:922.2 Mathematical Statistics  -  922 Statistical Methods  -  921.3 Mathematical Transformations  -  921 Mathematics  -  821.4 Agricultural Products  -  931.2 Physical Properties of Gases, Liquids and Solids  -  803 Chemical Agents and Basic Industrial Chemicals  -  732 Control Devices  -  716.1 Information Theory and Signal Processing  -  716 Telecommunication; Radar, Radio and Television  -  461.7 Health Care  -  801 Chemistry
 Database:Compendex
   
28. Accession number:20112214017072
Title:Online assessment strategy of component quality based on dynamic measurement process
 Authors:Zhang, Jian1 ; Wu, Jianwei1 ; Ma, Zhiyong1
Author affiliation:  1  Mechanical Design Institute, Zhejiang University, Hangzhou 310027, China
 Corresponding author:Wu, J. (sdwjw@zju.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 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: During the process of quality assessment, aiming at the dynamics of measurement error and the two kinds of decision mistakes, namely accepting a defect and rejecting a qualified component, an online assessment strategy of component quality was proposed. Dynamic measurement process analysis and Bayesian minimal cost decision rule were combined to evaluate the quality of components. A Kalman filtering model for dynamic estimation of systematic measurement error was established and the adaptive windowing approximation method was adopted to online adjust the variance of dynamic random measurement error. In the decision process, Bayesian minimal decision cost method was used to evaluate component quality and the decision confidence was provided as well. Finally, by taking the rotor dynamic balancing process as an example, the proposed method was validated. The results indicated that this method could trace the change of measurement error, decrease the risk of the two wrong decisions, and improve the reliability of quality decisions.
 Number of references:17
 Main heading:Quality control
Controlled terms:Approximation theory  -  Cost benefit analysis  -  Kalman filters  -  Measurements  -  Potential flow  -  Rating
Uncontrolled terms:Bayesian decision  -  Component  -  Dynamic measurement  -  Kalman filtering  -  Quality assessment
Classification code:943 Mechanical and Miscellaneous Measuring Instruments  -  942 Electric and Electronic Measuring Instruments  -  941 Acoustical and Optical Measuring Instruments  -  921.6 Numerical Methods  -  944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  913.3 Quality Assurance and Control  -  902.2 Codes and Standards  -  731.1 Control Systems  -  631.1 Fluid Flow, General  -  911 Cost and Value Engineering; Industrial Economics
 Database:Compendex
   
29. Accession number:20112214017067
Title:Characteristics of CH4 emission from liquid manure stored in under-floor pit of pig house in winter
Authors:Ye, Zhangying1 ; Li, Baoming2 ; Zhang, Guoqiang3 ; Pan, Jinming1 ; Zheng, Rongjin1 ; Zhu, Songming1
Author affiliation:  1  School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
2  College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
3  Faculty of Agricultural Sciences, University of Aarhus, Tjele 8830, Denmark
 Corresponding author:Zhu, S. (zhusm@zju.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:184-189 210
 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:CH4 emissions from liquid pig manure stored in under-floor pits were investigated using an empty full-scale pig house in Denmark in winter season. The experiment designs were three manure depths of 0.15, 0.40 and 0.65 m, four ventilation rates of 211, 650, 1852 and 3088 m3/h, and with or without pit curtains. The three parameters that explained most of the variability of the CH4 emissions were manure temperature, manure depth and ventilation rate. There were no significant differences in CH4 emission rates among four ventilation rates with diffuse ceiling inlet and negative pressure exhaust. However, the lower manure temperature could reduce CH4 emission or compensate the effects of higher ventilation rate. CH4 emission rate reduced with decreasing manure depth in pit. No significant differences in CH4 emission rates were found by using manure pit curtains. The emission rates were more sensitive to manure temperature than to manure depth and ventilation rate due to higher sensitivity percentages. At the lower ventilation rate and manure depth ranges, the emission rates were more sensitive to ventilation rate change compared to the higher ones. However, the contrary sensitivity responses for different manure temperature ranges were obtained.
 Number of references:16
 Main heading:Manures
Controlled terms:Floors  -  Houses  -  Liquids  -  Mammals  -  Particulate emissions  -  Ventilation  -  Ventilation exhausts
Uncontrolled terms:CH4 emission  -  Denmark  -  Depth range  -  Emission rates  -  Experiment design  -  Liquid manure  -  Liquid pig  -  Negative pressures  -  Pig house  -  Temperature range   -  Three parameters  -  Under-floor pit  -  Ventilation rate  -  Winter seasons
Classification code:931.2 Physical Properties of Gases, Liquids and Solids  -  821.5 Agricultural Wastes  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  643.5 Ventilation  -  451.1 Air Pollution Sources  -  402.3 Residences  -  402 Buildings and Towers
 Database:Compendex
   
30. Accession number:20112214017031
 Title:Self-adaptive slope gearshift strategy for automatic transmission vehicles
 Authors:Shi, Junwu1 ; Lu, Tongli1 ; Li, Xiaowei1 ; Zhang, Jianwu1
Author affiliation: 1  State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China
 Corresponding author:Shi, J. (shijunwu1981@sjtu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:1-7
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:With the analysis of vehicle longitudinal dynamic model, a modified recursive least squares for online estimation of vehicle mass and generalized slope was established. Compared with the recursive least squares of single forgetting factor, the modified algorithm had better performance in estimation of parameters with different change rates. On the base of that, the self-adaptive gearshift strategies of uphill and downhill slopes were developed. The vehicle road test results indicated that these strategies could improve the slope traveling performance of automatic transmission and overcome the problems encountered by traditional gearshift strategy travels on slopes.
 Number of references:10
 Main heading:Vehicle transmissions
 Controlled terms:Estimation  -  Vehicles
Uncontrolled terms:Automatic transmission  -  Modified least squares estimation  -  Self-adaptive  -  Slope recognition  -  Vehicle mass recognition
Classification code:432 Highway Transportation  -  602.2 Mechanical Transmissions  -  921 Mathematics
 Database:Compendex
   
31. Accession number:20112214017032
 Title:Hierarchical traction control for hybrid electric vehicle and hardware-in-loop test
 Authors:Zhao, Feng1 ; Luo, Yugong2 ; Li, Keqiang2 ; Zhang, Wenming1
Author affiliation: 1  School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China、
2  State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
 Corresponding author:Zhao, F. (zhaofeng2222@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:8-12
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Control method for traction control system of conventional internal combustion engine vehicle is not suitable for hybrid electric vehicle. The traction control system of hybrid electric vehicle should be redesigned. Hierarchical traction control system for ISG hybrid electric vehicle was proposed. In the top layer, desired traction total torque calculation strategy was used based on dynamical sliding mode control. In the middle layer, design algorithm of target engine torque based on low pass filtering and dynamic coordinate control strategy based on model matching 2-DOF control were developed. In the bottom layer, exit strategy based on dynamic compensation was proposed. At last, tests of simulation and hardware-in-loop were performed to verify the control system. Results of simulation and test showed that the proposed hierarchical traction control method for ISG hybrid electric vehicle could control the slipped wheels quickly and accurately to realize the traction control function of ISG hybrid electric vehicle effectively.
 Number of references:7
 Main heading:Electric traction
Controlled terms:Automobiles  -  Control theory  -  Electric vehicles  -  Internal combustion engines  -  Secondary batteries  -  Traction (friction)  -  Vehicle wheels
Uncontrolled terms:Bottom layers  -  Control methods  -  Coordinate control  -  Engine torque  -  Hardware-in-loop  -  Hierarchical control  -  Hybrid electric vehicle  -  Internal combustion engine vehicles  -  Low-pass filtering  -  Middle layer   -  Model matching  -  ON dynamics  -  Total torque  -  Traction control  -  Traction control systems
Classification code:731.1 Control Systems  -  705 Electric Generators and Motors  -  702.1.2 Secondary Batteries  -  682.1.1 Railroad Cars  -  662.1 Automobiles  -  612.1 Internal Combustion Engines, General  -  601.2 Machine Components
 Database:Compendex
   
32. Accession number:20112214017043
 Title:Improved design and experiment of 9ST-460 vibration spacing scarifier for grassland
Authors:Dong, Xiangqian1 ; Song, Jiannong1 ; Wang, Jicheng1 ; Li, Yonglei1 ; Liu, Honglai2
Author affiliation: 1  College of Engineering, China Agricultural University, Beijing 100083, China
2  College of Animal Science and Technology, China Agricultural University, Beijing 100193, 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:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:62-65
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Aimed to the problems revealed in latest grassland tests of the 9ST-460 vibration spacing scarifier, optimizations were carried out on the transmission mode of the parts, vibrating and loosening components. The results of comparing test indicated that the improved device ran steadily and showed good performance. The bulk density of soil decreased but water content increased after scarifying. The yearly average economic benefit increased by 155 RMB/hm2 in next 3 years after scarifying, which well fulfilled the requirements of grassland improvement procedure.
 Number of references:7
 Main heading:Experiments
 Controlled terms:Linear transformations  -  Optimization  -  Water content
Uncontrolled terms:Bulk density  -  Economic benefits  -  Grassland improvement  -  Scarifier  -  Transmission mode
Classification code:444 Water Resources  -  901.3 Engineering Research  -  921.3 Mathematical Transformations  -  921.5 Optimization Techniques
 Database:Compendex
   
33. Accession number:20112214017045
 Title:Air flow simulation and flow field optimization for airduct of air-assisted boom sprayer
 Authors:Liu, Xuemei1 ; Zhang, Xiaohui1 ; Hou, Cunliang1
Author affiliation: 1  College of Mechanical and Electrical Engineering, Shandong Agricultural University, Taian 271018, China
 Corresponding author:Zhang, X. (zhangxh@sdau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:70-75
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To improve the drawbacks of original designed air-assisted duct of boom sprayer, such as huge wind consumption, low efficiency, large coefficient variation (CV) of wind velocity, 3-D flow field of interior duct and exterior free flow region was simulated by using computational fluid dynamics (CFD). Flow field analysis of the simulation results showed that there were strong swirling and narrow flow channel in the flow field of prototype air-assisted duct. It also resulted in large CV in exterior free flow field. In response to these shortcomings, two kinds of improvement designs were proposed. Firstly, the outlet size and outlets spacing was decreased to greatly reduce the CV of wind velocity, but could not fundamentally change the flow structure. Secondly, on the basis of above optimization, a flow deflector was added to overcome the strong swirling flow and narrow flow channel. Prototype testing indicated that final scheme achieved high efficiency and small wind speed variations.
 Number of references:12
 Main heading:Computational fluid dynamics
Controlled terms:Air  -  Channel flow  -  Ducts  -  Flow fields  -  Flow simulation  -  Optimization
Uncontrolled terms:Air-assisted duct  -  Boom sprayer  -  Computational fluid  -  Flow deflector  -  Flow field analysis
Classification code:631 Fluid Flow  -  641.2 Heat Transfer  -  804 Chemical Products Generally  -  921.5 Optimization Techniques  -  921.6 Numerical Methods
 Database:Compendex
   
34. Accession number:20112214017035
Title:Application of physical programming in uncertainty optimization design of multi-disc wet brake
 Authors:Yu, Miao1 ; Shi, Boqiang1 ; Jiang, Yong1
Author affiliation:  1  College of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
 Corresponding author:Yu, M. (ym-820610@sohu.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:22-26 32
 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:There are many uncertain factors in the design of multi-disc wet brake. Considering of that, optimization design was applied with physical programming. Results of physical programming were compared with the traditional linear weighted-sum optimization. It is feasible to apply physical programming method to uncertainty optimization design of multi-disc wet brake. It meets the actual needs better than the linear weighted-sum method.
 Number of references:10
 Main heading:Design
 Controlled terms:Brakes  -  Optimization
Uncontrolled terms:Optimization design  -  Physical programming  -  Uncertain factors  -  Uncertainty  -  Weighted-sum  -  Wet brakes
Classification code:408 Structural Design  -  602 Mechanical Drives and Transmissions  -  921.5 Optimization Techniques
 Database:Compendex
   
35. Accession number:20112214017060
 Title:Adaptive wavelet precise integration method on remote sensing image denoising
 Authors:Xu, Wenning1 ; Mei, Shuli1 ; Wang, Pengxin1 ; Yang, Yong2
Author affiliation: 1  College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
2  Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
 Corresponding author:Mei, S. (meishuli@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:148-152
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The image denoising variational method possesses higher numerical precision but lower computational efficiency, especially in processing the remote sensing images which is usually larger. To this problem, an adaptive 2-D wavelet interpolation operator was constructed based on quasi-Shannon wavelet function, and then adaptive wavelet precision integration method (PIM) on solving 2-D partial differential equation was proposed by combining with PIM. This proposed method combined the multi-scale property of the wavelet transformation with the higher precision of PIM, which could improve the computational efficiency effectively so that the lager remote sensing image could be processed.
 Number of references:18
 Main heading:Computational efficiency
Controlled terms:Image reconstruction  -  Integration  -  Interpolation  -  Mathematical operators  -  Noise pollution control  -  Numerical methods  -  Partial differential equations  -  Remote sensing  -  Wavelet transforms
Uncontrolled terms:Adaptive interpolation  -  Image denoising  -  Precise integration  -  Quasi-Shannon wavelets  -  Remote sensing image
Classification code:461.7 Health Care  -  731.1 Control Systems  -  741 Light, Optics and Optical Devices  -  921 Mathematics
 Database:Compendex
   
36. Accession number:20112214017034
Title:Design of multi-objective optimization module in vehicle body structure concept design system
 Authors:Liu, Baoyue1 ; Hou, Wenbin1 ; Zhang, Hongzhe2 ; Hu, Ping1
Author affiliation:  1  School of Automotive Engineering, Dalian University of Technology, Dalian 116024, China
2  School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
 Corresponding author:Hou, W. (houwb@dlut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:17-21
 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 avoid modifying vehicle body repeatedly in the later design stage, the multi-objective optimization module in vehicle concept design intelligent CAE system (VCD-ICAE) was developed. A multi-objective optimization algorithm was designed with the objectives of body structure stiffness and modal. The whole body structure performance could be improved on the premise that mass of body didn't increase. The basis for realization of body lightweight in concept design stage was provided, so the time and cost were economized. Combining concept design process of a concrete body model, the multi-objective optimization was carried on. The bending stiffness, torsion stiffness, first bending frequency and first torsion frequency of body were increased. The validity and correctness of the proposed multi-objective optimization module was verified.
 Number of references:11
 Main heading:Multiobjective optimization
Controlled terms:Automobile frames  -  Stiffness  -  Structural design  -  Torsional stress  -  Vehicles
Uncontrolled terms:Bending frequency  -  Bending stiffness  -  Body models  -  Body structure  -  CAE systems  -  Concept designs  -  Design stage  -  In-vehicle  -  Lightweight  -  Multi objective   -  Optimization algorithms  -  Optimization module  -  Torsion stiffness  -  Vehicle body  -  Whole body
Classification code:408.1 Structural Design, General  -  421 Strength of Building Materials; Mechanical Properties  -  432 Highway Transportation  -  663.2 Heavy Duty Motor Vehicle Components  -  921.5 Optimization Techniques
 Database:Compendex
   
37. Accession number:20112214017069
Title:Integrated and simplified dynamics modeling simulation analysis of 6-UPU electric platform
 Authors:Wu, Guanghua1 ; Gong, Liehang1 ; Lu, Ying2 ; Gai, Yongjun2 ; Pan, Chunping2
Author affiliation:  1  Engineering Institute of Engineering, PLA University of Science and Technology, Nanjing 210007, China
2  Military Simulation Technology Research Institute, Aviation University of Air Force, Changchun 130022, China
 Corresponding author:Wu, G. (wgh5668@tom.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:195-200
 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:6-UPU electric platform was analyzed considering of the different points of the structural type. An integrated dynamic model of 6-UPU electric platform was built and written to general form based on kinematics analysis, considering of centroids of electric actuator deviating the axes of themselves and snail-mechanism going around the axes of themselves. Taking the heavy load electric platform with low speed as example, both integrated and simplified dynamics model were emulated and analyzed. The reasonability of the simplified condition of dynamics model was verified. The error tolerance was within 1% to 2.2%. A numerical example showed that this model had universality for the move platform of the similar mechanisms.
 Number of references:9
 Main heading:Dynamics
 Controlled terms:Computer simulation  -  Integration  -  Kinematics
Uncontrolled terms:Dynamics modeling  -  Dynamics models  -  Electric actuators  -  Electric platform  -  Error tolerance  -  Heavy loads  -  Kinematics analysis  -  Low speed  -  Numerical example  -  Reasonability   -  Simulation  -  Structural type
Classification code:723.5 Computer Applications  -  921.2 Calculus  -  931.1 Mechanics
 Database:Compendex
   
38. Accession number:20112214017055
Title:Extraction technology and antioxidant activities of bioactive components from Terminalia chebula Retz.
Authors:Jiang, Shenhua1, 2 ; Wu, Shiyun2, 3 ; Ma, Haile2 ; Huang, Xingyi2 ; Wang, Zhenbin2 ; Liao, Liang1
Author affiliation:  1  College of Life Science, Jiujiang University, Jiujiang 332000, China
2  School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
3  College of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
 Corresponding author:Ma, H. (mhl@ujs.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:120-126
 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 extraction technology and antioxidant activities of the bioactive components from Terminalia chebula Retz. were studied. The results showed that the optimal parameters of the extraction technology were that the concentration of ethanol was 50%, the ratio of extraction solution to sample was 20, the extraction temperature was 60°C, the extraction times was 4 and the extraction time was 7 min. The crude extracts from this plant were proved to have strong antioxidant activities through the results of the reducing power, the FRAP assay and the DPPH radicals scavenging percentages. The bioactive antioxidants of Terminalia chebula Retz. were mainly laid in the ethyl acetate fraction based on the bioassay-guided method. The OD values at 700 nm (reducing power), FRAP values (OD593 nm) and DPPH radicals-scavenging percentages of this fraction with the concentrations of 25 and 50 μg/mL were 0.197±0.002 and 0.380±0.006, 0.272±0.023 and 0.631±0.002, (86.838±0.600)% and (90.318±0.917)%, respectively. The correlation showed that the strong antioxidant activity mainly resulted from the high contents of total phenols and total flavonoids.
 Number of references:21
 Main heading:Extraction
 Controlled terms:Bioassay  -  Ethanol  -  Phenols  -  Plants (botany)  -  Technology
Uncontrolled terms:Antioxidant  -  Antioxidant activities  -  Bioactive components  -  Crude extract  -  Ethyl acetates  -  Extraction solution  -  Extraction technology  -  Extraction temperatures  -  Extraction time  -  FRAP assay   -  High-content  -  Optimal parameter  -  Reducing power  -  Terminalia chebula  -  Total phenols
Classification code:461.9 Biology  -  801 Chemistry  -  802.3 Chemical Operations  -  804.1 Organic Compounds  -  901 Engineering Profession
 Database:Compendex
   
39. Accession number:20112214017041
Title:Kinematic principle analysis of transplanting mechanism with planetary elliptic gears in automatic vegetable transplanter
 Authors:Yu, Gaohong1 ; Liu, Binghua1 ; Zhao, Yun1 ; Sun, Liang1 ; Xie, Yongliang2
Author affiliation:  1  Faculty of Mechanical Engineering and Automation, Zhejiang Sci.-Technol. University, Hangzhou 310018, China
2  Zhejiang Technical Institute of Economics, Hangzhou 310018, China
 Corresponding author:Yu, G. (yugh@zstu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:53-57
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A rotary transplanting mechanism with planetary elliptic gears used to transplant seedlings for automatic vegetable transplanter was described. Work principle and structural features of the mechanism were analyzed. The kinematics model was established. Based on Visual Basic 6.0, the software of aided analysis and parameters optimization for rotary transplanting mechanism were developed. Kinematics property was analyzed and simulated. Though conversations in human-computer, structural parameters of the transplanting mechanism were optimized and meet the demands of transplanting seedlings. Finally, 3-D mechanism model and simulation analysis were carried out, and the results of simulation accorded with theoretical analysis.
 Number of references:12
 Main heading:Vegetables
Controlled terms:Gears  -  Geometry  -  Kinematics  -  Mathematical models  -  Optimization  -  Three dimensional
Uncontrolled terms:Automatic transplanting mechanism  -  Elliptic gears  -  Human-computer  -  Kinematics models  -  Kinematics properties  -  Mechanism model  -  Parameters optimization  -  Principle analysis  -  Structural feature  -  Structural parameter   -  Visual Basic 6.0  -  Work principle
Classification code: 601.2 Machine Components  -  821.4 Agricultural Products  -  902.1 Engineering Graphics  -  921 Mathematics  -  921.5 Optimization Techniques  -  931.1 Mechanics
 Database:Compendex
   
40. Accession number:20112214017047
 Title:Design and experiment of bale drying machinery using solar energy
 Authors:Yang, Shikun1 ; Du, Jianqiang1
Author affiliation:  1  Huhhot Branch, Chinese Academy of Agricultural Mechanization Sciences, Huhhot 010020, China
 Corresponding author:Yang, S. (yskun001@sohu.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:81-86
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Aiming at exiting problems of flowers and leaves as well as the nutrition loss by using the dry harvesting technology process in field for forage grass, the introduction for the wet harvesting technology process innovation and its advantages of forage grass in different views was gave, such as technological theory and technological process. And in order to provide technical support for forage grass dimension mechanization desiccation by using solar energy, one type of solar energy bale drying machinery was developed. It could work in solar automatism collection manner and dry the bale of moisture content in around 40%. Products could be directly baled and stored. The performance test of the equipment and the dry grass and wet harvest were experimented. The tested results were listed as follows: solar drying forage loss was less than or equal to 2%, finished bale moisture content was less than or equal to 17%. The collector efficiency of solar energy air was more than or equal to 50% and handling ability was more than 1 t/h.
 Number of references:13
 Main heading:Solar energy
Controlled terms:Collector efficiency  -  Drying  -  Energy harvesting  -  Experiments  -  Harvesting  -  Innovation  -  Machine design  -  Machinery  -  Moisture  -  Moisture determination   -  Solar radiation
Uncontrolled terms:Bale  -  Forage grass  -  In-field  -  Moisture contents  -  Nutrition loss  -  Performance tests  -  Process Innovation  -  Solar drying  -  Solare energy  -  Technical support   -  Technological process
Classification code:912 Industrial Engineering and Management  -  901.3 Engineering Research  -  821.3 Agricultural Methods  -  801.4 Physical Chemistry  -  944.2 Moisture Measurements  -  702.3 Solar Cells  -  642.1 Process Heating  -  601 Mechanical Design  -  525.5 Energy Conversion Issues  -  657.1 Solar Energy and Phenomena
 Database:Compendex
   
41. Accession number:20112214017076
 Title:A fast forward algorithm for 3-RPS parallel mechanism
 Authors:Han, Fangyuan1 ; Zhao, Dingxuan1 ; Li, Tianyu1
Author affiliation:  1  College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
 Corresponding author:Han, F. (fangyuanhan@sina.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:229-233
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:This paper presented a fast forward algorithm for 3-RPS (revolute-prismatic-spherical) parallel mechanism. Based on the structure feature of 3-RPS parallel mechanism, firstly, a group of position and orientation coordinates were calculated as the initial value, then the coordinates of each hinge fulcrum on the platform by means of reverse algorithm were obtained and adjusted. No derivative operation or Jacobi matrix inverse operation was needed in proposed algorithm. It effectively reduced the computational load, and the formula was simple. In the same computing environment, the calculation experiment results showed that the amount of programming of the proposed algorithm was only 40% of the existing algorithms, the calculation speed of the proposed algorithm was about 1.5 times of the existing algorithms to achieve the same accuracy. It can be applied to online control.
 Number of references:7
 Main heading:Algorithms
Controlled terms:Inverse problems  -  Jacobian matrices  -  Mechanisms  -  Numerical methods
Uncontrolled terms:Calculation speed  -  Computational loads  -  Computing environments  -  Fast forward  -  Forward kinematics  -  Initial values  -  Jacobi matrix  -  On-line controls  -  Parallel mechanism  -  Parallel mechanisms   -  Structure features
 Classification code:601.3 Mechanisms  -  921 Mathematics
 Database:Compendex
   
42. Accession number:20112214017053
 Title:Respiration rate model of agaricus bisporus based on langmuir adsorption theory
 Authors:Wang, Juan1 ; Wang, Xiangyou1 ; Zhu, Jiying1 ; Liu, Zhanli1
Author affiliation:  1  School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
 Corresponding author:Wang, X. (wxy@sdut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:110-115
 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 change of respiration rate of Agaricus bisporus, packed in film, with storage time was studied at the storage temperature of 5°C, 10°C, 15°C, 20°C and 25°C. The results indicated that the mushroom respiration rate showed a significant decrease with increasing storage period until dynamic equilibrium. A respiration model of Agaricus bisporus, based on Langmuir adsorption theory, was proposed at different temperatures. The results suggested that the mushroom respiration rate increased with increasing of O2 concentrations, and decreased with increasing of CO2 concentrations. The maximum rate increased with temperature, and the relationship between maximum rate and temperature was well described by the Arrhenius equation.
 Number of references:18
 Main heading:Physiology
 Controlled terms:Adsorption  -  Carbon dioxide  -  Mathematical models
Uncontrolled terms:Adsorption theory  -  Agaricus bisporus  -  Arrhenius equation  -  Dynamic equilibria  -  Langmuir adsorption theory  -  Respiration rate  -  Storage periods  -  Storage temperatures  -  Storage time
Classification code:461.9 Biology  -  802.3 Chemical Operations  -  804.2 Inorganic Compounds  -  921 Mathematics
 Database:Compendex
   
43. Accession number:20112214017036
 Title:Co-simulation analysis of working characteristic for large hydraulic excavator
 Authors:Zhu, Xiaojing1 ; Quan, Long1 ; Wang, Xinzhong2 ; Lü, Xiaolin2 ; Li, Guang2
Author affiliation:  1  Institute of Mechatronic Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2  Technology Center, Taiyuan Heavy Industry Co. Ltd., Taiyuan 030024, China
 Corresponding author:Quan, L. (quanlong@tyut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:27-32
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to study the working characteristics of mining face-shovel hydraulic excavator with bucket capacity of 15 m3 and machine weight of 260 t, which is currently the largest tonnage of hydraulic excavator, co-simulation method of the dynamics of mechanical systems and hydraulic systems to the small excavator was authenticated. Then, by comparing the results of test and co-simulation, it was confirmed that co-simulation method could accurately simulate the practical working environment of excavator. On the base of before-mentioned research, mechanical devices and hydraulic systems of mining hydraulic excavator which bucket capacity is 15 m3 were carried on with the help of ADAMS and AMESim software. Through simulation the rotation inertias of various parts of working mechanism to its rotation axis during working process were calculated. The displacement curves, velocity curves, force curves of each hydraulic cylinder and the excavating trajectory of bucket tooth crest could be obtained through co-simulation.
 Number of references:12
 Main heading:Excavators
Controlled terms:Construction equipment  -  Excavation  -  Hydraulic equipment  -  Hydraulic machinery  -  Hydraulics  -  Rotation
Uncontrolled terms:Cosimulation  -  Displacement curve  -  Force Curve  -  Hydraulic cylinders  -  Hydraulic excavator  -  Hydraulic system  -  Mechanical device  -  Mechanical systems  -  Rotation axis  -  Velocity curves   -  Working characteristics  -  Working environment  -  Working mechanisms  -  Working process
Classification code:405.1 Construction Equipment  -  405.2 Construction Methods  -  601.1 Mechanical Devices  -  632.1 Hydraulics  -  632.2 Hydraulic Equipment and Machinery
 Database:Compendex
   
44. Accession number:20112214017052
 Title:Sludge recycle trial of cattle manure anaerobic fermentation
 Authors:Xia, Jiqing1 ; Ma, Tianyi1 ; Bi, Jingyi1 ; Zheng, Guoxiang1 ; Li, Wenzhe1
Author affiliation:  1  College of Engineering, Northeast Agricultural University, Harbin 150030, China
 Corresponding author:Xia, J. (xjq12345@sohu.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:105-109
 Language:Chinese
 ISSN:10001298
 CODEN:NUYCA3
 Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to improve the efficiency of two-stage anaerobic fermentation system, the circulation process of sludge, composed of the activated sludge online and the activated sludge of the optimal period from storage tanks, was studied. Three factors, including feed concentration, day feeding quantities and sludge recycle ratio, were selected as independent variables, while COD removal rate and biogas production amount were as evaluating indicators. With the quadratic orthogonal rotating combinatorial method, the effects of different parameters on COD removal rate and biogas production amount were analyzed. The results showed that feed concentration, day feeding quantities and sludge recycle ratio were main influencing factors on two evaluating indication, and the mixed sludge recycle ratio had a significant effect. For the anaerobic fermentation system, the optimum parameters of process were feed concentration of 8.21%, day feeding quantities of 7.15 L/d and sludge recycle ratio of 30%, respectively.
 Number of references:12
 Main heading:Activated sludge process
 Controlled terms:Biogas  -  Feeding  -  Fermentation  -  Manures  -  Recycling
Uncontrolled terms:Activated sludge  -  Anaerobic fermentation  -  Biogas production  -  Cattle manures  -  COD removal rate  -  Combinatorial method  -  Evaluating indicators  -  Feed concentration  -  Independent variables  -  Influencing factor   -  Optimum parameters  -  Sludge recycle  -  Storage tank  -  Two stage
Classification code:452.2 Sewage Treatment  -  452.3 Industrial Wastes  -  522 Gas Fuels  -  691.2 Materials Handling Methods  -  802.2 Chemical Reactions
 Database:Compendex
   
45. Accession number:20112214017071
Title:Damping identification for closely spaced modes based on inner product calculation and iterative algorithm
 Authors:Zhao, Xiaodan1 ; Zhang, Zhongye1 ; Luo, Ying1
Author affiliation:  1  School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
 Corresponding author:Zhao, X. (zhaoxiaodan@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 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:Damping estimation is difficult as a result of modal interference existing in closely spaced modes, a combinational method of inner product calculation and iterative algorithm was presented. Firstly, resonant frequency of the topmost spectral peak was counted by the application of FFT-FT. Secondly, inner product was conducted between response signal and the constructed exponential function. According to the theorem of Cauchy-Schwarz inequality, the attenuation coefficient was achieved by calculating the maximum of the inner product module, meanwhile, the amplitude and phase of the corresponding modal signal were obtained. One modal signal could be estimated from the above calculations. Thirdly, the estimated signal was subtracted from the overall response signal, and then estimated the next modal signal. In this way, an iteration process was formed by repeating the above diagnosing procedures, which could solve the modal interference. Both simulation calculation and experiment were conducted to validate the method.
 Number of references:12
 Main heading:Iterative methods
Controlled terms:Algorithms  -  Damping  -  Exponential functions  -  Modal analysis  -  Natural frequencies
Uncontrolled terms:Attenuation coefficient  -  Cauchy-Schwarz inequality  -  Closely spaced modes  -  Damping estimations  -  Damping identification  -  Identification  -  Inner product  -  Iteration  -  Iteration process  -  Iterative algorithm   -  Modal interference  -  Resonant frequencies  -  Response signal  -  Simulation calculation  -  Spectral peak
Classification code:711.1 Electromagnetic Waves in Different Media  -  921 Mathematics  -  921.6 Numerical Methods  -  931.1 Mechanics
 Database:Compendex
   
46. Accession number:20112214017058
 Title:Design of digital honey water content meter
 Authors:Zhang, Lifeng1 ; Guo, Wenchuan1 ; Fu, Hexiang1 ; Xia, Wenbin1
Author affiliation:  1  College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
 Corresponding author:Guo, W. (guowenchuan69@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
 Abbreviated source title:Nongye Jixie Xuebao
 Volume:42
 Issue:4
 Issue date:April 2011
 Publication year:2011
 Pages:139-143 147
 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 offer a meter with the characteristics of easy taking, quickly measuring, high precision, being suitable for online detection, and overcoming influence of temperature on measurement for honey water content detection, based on the experiment and electrical conductivity detection principle, a honey water content meter was designed. Firstly, yellow-locust honey was used to establish the mathematical model among water content (17%-34%), temperature (5-40°C) and electrical conductivity. Then the hardware was designed with single chip micro-computer (SCM) of 8 bits as controller, DJS-1 electrode and DS18B20 as sensors of electrical conductivity and temperature, respectively. The software was programmed with C language of SCM. The detection results showed that the measurement time of one sample was within 3 s and the precision was ±0.5%.
 Number of references:11
 Main heading:Water content
Controlled terms:C (programming language)  -  Computer hardware  -  Electric conductivity  -  Food products  -  Mathematical models
Uncontrolled terms:C language  -  Content detection  -  Detection  -  Electrical conductivity  -  High precision  -  Honey  -  Measurement time  -  On-line detection  -  Single chips
Classification code:444 Water Resources  -  701.1 Electricity: Basic Concepts and Phenomena  -  722 Computer Systems and Equipment  -  723.1.1 Computer Programming Languages  -  822.3 Food Products  -  921 Mathematics
 Database:Compendex