2008年第39卷第3期共收錄44篇
1. Accession number: 081911244869
Title: Nondestructive detection of volatile oil content in Zanthoxylum bungeagum Maxim by near infrared spectroscopy
Authors: Wang, Gang; Zhu, Shiping; Kan, Jianquan; Yang, Fei; Guo, Jing; Wang, Yiming
Author affiliation: Southwest University, Chongqing 400716, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 79-81 85
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The method of near infrared reflectance spectroscopy for predicting volatile oil content in intact Zanthoxylum bungeagum Maxim was developed. Adopting partial least squares (PLS) regression, the prediction models were built by the 118 samples in 9 kinds acquisition parameters combination with the resolution (4, 8 and 16 cm-1) and the sample scans (32, 64 and 128). Results demonstrated that the model obtained at resolution of 16 cm-1 and sample scans of 128 was better than the others, and the determination coefficient and RMSECV of cross validation were 0.907 and 0.509, respectively. Applying the model to the test set with 20 samples, the determination coefficient, RMSEP and RPD of test set validation were 0.973, 0.272 and 6.28, respectively. The experimental results show that NIRS can be used as a method to detect intact Zanthoxylum bungeagum Maxim volatile oil content rapidly and nondestructively.
Number of references: 13
Ei main heading: Agricultural products
Ei controlled terms: Computer applications - Near infrared spectroscopy - Nondestructive examination
Uncontrolled terms: Zanthoxylum bungeagum Maxim - Volatile oil content - Nondestructive detection
Ei classification codes: 422.2 Test Methods - 723.5 Computer Applications - 821.4 Agricultural Products - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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2. Accession number: 081911244870
Title: Effect of high intensity pulsed electric field on germination of old pepper seeds
Authors: Yin, Yongguang; Chi, Yanping; Li, Tingting
Author affiliation: Jilin University, Changchun 130022, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 82-85
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: By means of quadratic general rotational combination design, the effect of high intensity pulsed electric field strength and operation time on germination of old pepper seeds was investigated experimentally. A quadric regression equation between germination index Y and factors was established, and the optimum combination of parameters values was obtained subsequently. The results showed that the two factors had significant influence on seed germination (ρ less than or equal 0.01), and the influence of field strength was more than that of operation time. The optimum parameters values are 6.50 μkV/cm of field strength and 200 seconds of operation time respectively.
Number of references: 9
Ei main heading: Seed
Ei controlled terms: Biology - Electric conductivity - Electric fields - Experiments
Uncontrolled terms: Pepper - Germination - High intensity pulsed electric field
Ei classification codes: 461.9 Biology - 701.1 Electricity: Basic Concepts and Phenomena - 821.4 Agricultural Products
Treatment: Experimental (EXP)
Database: Compendex
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3. Accession number: 081911244871
Title: Isolation screening and identification of antagonistic actinomycetes having ability in inhibiting patulin-producing penicillium
Authors: Zhu, Conghui; Shi, Junling; Yang, Baowei; Ling, Zhenmin; Wang, Rui
Author affiliation: Northwest A and F University, Yangling 712100, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 86-89
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: In order to find out actinomycetes having ability in patulin-producing penicillum, 154 strains of actinomycetes having different colony characteristics were isolated from soils of apple orchard, kiwifruit orchard and vegetable orchard. After screening, 4 strains were selected for further screening because they had high ability in inhibiting the growth of 3 strains of patulin-producing pecillium on the agar medium. Strain C16 showed the highest inhibiting ability by producing 2.33 cm inhibitory diameter in agar plate tests. Based on the morphologic, physiological and biochemical characteristics, C16 was identified as the Order of Actinomycetales, the Family of Micromonosporaceae, and the Genus of Micropolyspora.
Number of references: 14
Ei main heading: Fruits
Ei controlled terms: Bacteria - Health care - Optical microscopy - Orchards - Scanning electron microscopy - Screening
Uncontrolled terms: Apple - Patulin - Antagonistic actinomycetes - Identification
Ei classification codes: 461.7 Health Care - 461.9 Biology - 821.4 Agricultural Products
Treatment: Experimental (EXP)
Database: Compendex
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4. Accession number: 081911244872
Title: Soil water movement model and subarea irrigation parameter for gravity subsurface drip irrigation in loess plateau
Authors: Kang, Yinhong; Ma, Xiaoyi; Li, Juan; Wang, Bolei
Author affiliation: Northwest A and F University, Yangling 712100, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 90-95
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on unsaturated soil water movement theory, a three-dimensional mathematical model was developed to describe water flow movement under gravity subsurface drip irrigation (SDI). The effects of water supply pressure and dripper aperture on the soil wetting pattern, emitter charge and soil water potential with four typical soils from different subarea in Loess Plateau under gravity SDI were simulated and analyzed. The results indicate that the model can be used to analyze gravity SDI soil water infiltration characteristics and wetting pattern accurately. Gravity SDI is not suitable for Yulin area because of great deep leakage. Under the same irrigation quantity, pressure head and emitter diameter have slight effects on the wetting pattern but obvious effects on emitter effluent discharge in Ansai Sandy Loam, Luochuan Medium Loam and Wugong Heavy Loam. So the emitter aperture and water pressure can be decided only based on the field length and pipe infiltration loss for gravity SDI design. Meanwhile, it is necessary to adopt lower water pressure to reduce water supply pool height and the gravity SDI engineering investment. Especially for Wugong Heavy Loam, larger diameter dripper and higher water pressure will make the soil near drippers quick saturated and harden, therefore it should adopt the smaller diameter dripper and lower water pressure.
Number of references: 15
Ei main heading: Irrigation
Ei controlled terms: Boundary conditions - Computer simulation - Mathematical models - Water
Uncontrolled terms: Subsurface drip irrigation (SDI) - Loess Plateau - Soil water movement
Ei classification codes: 723.5 Computer Applications - 821.3 Agricultural Methods - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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5. Accession number: 081911244873
Title: Effect of space-time deficit irrigation on physiological and gronomic features of hot pepper in greenhouse
Authors: Shao, Guangcheng; Zhang, Juan; Chen, Lei; Liu, Na; Xing, Wengang
Author affiliation: Hohai University, Nanjing 210098, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 96-100
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on potted experimental data conducted at automatization greenhouse in water-saving park of Hohai university, influence of space-time deficit irrigation on physiological and gronomic features of hot pepper was studied, and the influence mechanism of space-time deficit irrigation on the water use efficiency (WUE) of leaf level of hot pepper was analyzed. The experimental results showed that space-time deficit irrigation had a certain inhibition on the growth of height, leaf area, and other vegetative indexes. However, the moderate space-time deficit irrigation could restrain transpiration rate enormously, but make photosynthesis rate fall slowly. Therefore, WUE of leaf level is considerably improved because the photosynthesis has the compensating effect after rewatering.
Number of references: 6
Ei main heading: Agricultural products
Ei controlled terms: Greenhouses - Irrigation - Physiology
Uncontrolled terms: Hot pepper - Alternate partial rootzone irrigation - Regulated deficit irrigation
Ei classification codes: 821.3 Agricultural Methods - 821.4 Agricultural Products
Treatment: Experimental (EXP)
Database: Compendex
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6. Accession number: 081911244874
Title: Optimization of aerobic composting parameters on pig slurry-wheat straw reactor
Authors: Lu, Huangzhen; Han, Lujia; Yang, Zengling
Author affiliation: China Agricultural University, Beijing 100083, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 101-105 100
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: To study the effects of different parameters such as initial C/N ratio, aeration rate and initial water content on volatile solid reduction, relative heat generation HR and the continue time t of the compost temperature above 50°C during pig slurry-wheat straw composting, the successive single factor composting tests and the orthogonal composting tests were carried out to optimize the composting process, respectively. The dry wheat straw was chosen as bulking agent, successively single factor composting tests were conducted on with the initial C/N ratio of 20, 25, 30 and 35, with the aeration rate of 0.18, 0.26, 0.34 and 0.42 L/(min·kg), and with the initial water content of 55%, 60%, 65% and 70%, respectively. Based on the single factor tests, the orthogonal composting tests of L9(34) were designed, The experimental results showed that the initial C/N ratio had obvious influence on volatile solid reduction rate η and HR, especially on t, but the aeration rate and water content had not. According to the results of orthogonal composting tests, the optimal parameters for pig slurry-wheat straw composting were obtained as the initial C/N ratio of 20, the aeration rate of 0.34 L/(min·kg) and the initial water content of 65%.
Number of references: 22
Ei main heading: Composting
Ei controlled terms: Optimization - Statistical tests - Straw
Uncontrolled terms: Pig slurry - Wheat straw - Aerobic composting - Parameter optimization - Orthogonal test
Ei classification codes: 821.5 Agricultural Wastes - 921 Mathematics - 922.2 Mathematical Statistics
Treatment: Theoretical (THR)
Database: Compendex
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7. Accession number: 081911244875
Title: Machine vision-based navigation for a weeding robot
Authors: Hou, Xuegui; Chen, Yong; Guo, Weibin
Author affiliation: Nanjing Forestry University, Nanjing 210037, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 106-108 112
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A model of weeding robot, machine vision-based weed detection and navigation software in VC were developed. This software system could lead the weeding robot walk along crop rows and recognize weeds between rows simultaneously. A new image segmentation algorithm was proposed subsequently. Crops could be segmented from background directly in RGB space, and then the center lines of crop rows were identified by Hough transform. The robot poses were obtained according to the camera pose and perspective principle. Experiments showed that a colorful image (resolution: 1536 × 1152) could be segmented within 450 ms, and the new algorithm could also adapt the lightness variation. Optimized Hough transform algorithm reduced the segmentation time by 1/2. The average error of navigation distance and navigation angle was -0.6 mm and 0° respectively. The results showed that the navigation method was feasible.
Number of references: 8
Ei main heading: Weed control
Ei controlled terms: Algorithms - Computer vision - Hough transforms - Image segmentation - Navigation - Robot applications
Uncontrolled terms: Weeding robot - Machine vision - VC software
Ei classification codes: 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 731.6 Robot Applications - 821.2 Agricultural Chemicals - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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8. Accession number: 081911244876
Title: Hardware design of the end-effector for tomato-harvesting robot
Authors: Liu, Jizhan; Li, Pingping; Li, Zhiguo
Author affiliation: Jiangsu University, Zhenjiang 212013, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 109-112
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: An intelligent end-effector for tomato-harvesting robot was developed based on multi-sensor information fusion and open control. The end-effector is composed of actuating system, perception system, control system and power-supply system, In actuating system, the vacuum suction pad device separates the fruit from the cluster, and then a gripper grasps the tomato fruit reliably, finally the peduncle-cutting device cuts the peduncle with laser, Design mass of this end-effector is 1.2 kg, which needs only 3 s to perform actions of harvesting, By changing a connecting plate, the end-effector can be mounted on different manipulators.
Number of references: 12
Ei main heading: Fruits
Ei controlled terms: Control systems - End effectors - Harvesting - Information fusion - Robot applications
Uncontrolled terms: Tomato harvesting robot - Multi-sensors - Hardware design
Ei classification codes: 731.1 Control Systems - 731.6 Robot Applications - 821.3 Agricultural Methods - 821.4 Agricultural Products
Treatment: Theoretical (THR)
Database: Compendex
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9. Accession number: 081911244877
Title: Recognition of defect Chinese dates by machine vision and support vector machine
Authors: Zhao, Jiewen; Liu, Shaopeng; Zou, Xiaobo; Shi, Jiyong; Yin, Xiaoping
Author affiliation: Jiangsu University, Zhenjiang 212013, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 113-115 147
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: During the production and storage of Chinese dates, some of them are easy to mould rot because of high water content. The defect dates appear darker than the normal ones. Based on support vector machine, the recognition of the defect Chinese date machine vision was proposed. After the acquisition of the Chinese dates images, the color model was changed from RGB to HIS. Then, the average value H over-bar and standard square deviation value σH of dates hue values were calculate. Depending on the two values, there was few overlaps between defect dates and normal ones in the plot of H over-bar and σH. Therefore, H over-bar and σH were treated as the feature parameters. Artificial neural network (ANN) and support vector machine (SVM) model were used to analysis the dates features respectively. The experimental results show that SVM has a better performance than ANN on distinguish defect Chinese dates from normal ones, and the correct recognition rate of SVM is 96.2%.
Number of references: 12
Ei main heading: Fruits
Ei controlled terms: Computer vision - Defects - Feature extraction - Image segmentation - Neural networks - Support vector machines
Uncontrolled terms: Chinese date - Identification - Machine vision
Ei classification codes: 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 821.4 Agricultural Products
Treatment: Theoretical (THR)
Database: Compendex
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10. Accession number: 081911244878
Title: Forecast of disease and pest in apple orchards based on fusion of radial basis function neural network and WebGIS
Authors: Li, Li; Li, Daoliang; Zhou, Zhijian; Zhang, Yin; Fu, Zetian
Author affiliation: China Agricultural University, Beijing 100083, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 116-119 153
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A forecast system of diseases and pests for apple orchards was developed by using MVC structure with Java support based on ArcIMS. The forecast model, which could predicate 20 kinds of the diseases and pests, was integrated with spatial analyses of GIS by dynamic data exchange (DDE). The system can be applied to analyze spatially and temporally, forecast the diseases and pests, and promulgate the information with WebGIS. The forecasting of the regions and infection tendency of diseases and pests can be revealed with several patterns, such as map filled with different colors, topic graph, data table, text, or figure. Additionally, for instance of Tetranychus Viennensis in apple orchards, the predicting model constructed with radial basis function neural network (RBFNN) was purposed in this paper, and the predicting results were compared with those of back-propagation (BP) neural network model.
Number of references: 8
Ei main heading: Fruits
Ei controlled terms: Diseases - Forecasting - Orchards - Pest control - Radial basis function networks
Uncontrolled terms: Apple orchards - Radial basis function neural network - WebGIS
Ei classification codes: 723.4 Artificial Intelligence - 723.5 Computer Applications - 821.2 Agricultural Chemicals - 821.4 Agricultural Products
Treatment: Theoretical (THR)
Database: Compendex
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11. Accession number: 081911244879
Title: Design of optic system for crop nitrogen non-destructive monitoring instrument
Authors: Xu, Zhigang; Zhu, Yan; Jiao, Xuelei; Cao, Weixing; Liu, Xiaoying
Author affiliation: Nanjing Agricultural University, Nanjing 210095, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 120-122 166
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The optic characters of canopy reflectance spectral and the optic principle of non-destructive nitrogen monitoring were analyzed, and then the optic parameters disturbing the monitoring precision of the optic system were put forward, which included the uniformity in image optic field, the wide object field with short distance of survey, the operation dithering and the change of distance of survey. The scheme of optic system frame design, the key optic organs choosing and its optic parameters matching were proposed subsequently. Finally, the causes and control methods of the optic system measurement error were analyzed and the sample product was designed and manufactured.
Number of references: 8
Ei main heading: Crops
Ei controlled terms: Design - Monitoring - Nitrogen - Optical systems - Structural design
Uncontrolled terms: Nondestructive monitoring - Reflectance spectral
Ei classification codes: 408.1 Structural Design, General - 741.3 Optical Devices and Systems - 821.4 Agricultural Products
Treatment: Theoretical (THR)
Database: Compendex
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12. Accession number: 081911244880
Title: Coupling nonlinear dynamic finite element model of giant magnetostrictive actuator
Authors: Zhao, Zhangrong; Sui, Xiaomei; Wu, Yijie; Zhang, Lei
Author affiliation: North China Institute of Science and Technology, Beijing 101601, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 123-126
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The giant magnetostrictive actuator works at high frequency, and then the loss of giant magnetostrictive actuator includes magnetic hysteresis loss, eddy currency loss, and excess eddy current loss of actuator loop. The coupling between four fields (i.e., magnetic field, electric field, thermal field and mechanical stress field) is occurred at the actuator. Considering the mass of Terfenol-D rod, pre-stress, biased field, the loss of magnetic hysteresis and eddy current, a 3-D nonlinear dynamic model of GMA was established based on the coupled relationship of the three fields (magnetic field, electric field and mechanical stress field). The magnetic behavior was described by the Berqvist and Engdahl stress dependent magnetic hysteresis model for ferromagnetic hysteresis. The simulation results with commercial software FEMLAB were in agreement well with the experimental data. Therefore, the model constructed is valid, and it can help to optimize design of the GMA.
Number of references: 11
Ei main heading: Actuators
Ei controlled terms: Computer simulation - Couplings - Eddy currents - Electric fields - Finite element method - Magnetic fields - Magnetic hysteresis - Vibration control
Uncontrolled terms: Giant magnetostrictive actuator - Magnetic hysteresis loss - Thermal field - Mechanical stress field
Ei classification codes: 421 Strength of Building Materials; Mechanical Properties - 701.1 Electricity: Basic Concepts and Phenomena - 701.2 Magnetism: Basic Concepts and Phenomena - 723.5 Computer Applications - 731.3 Specific Variables Control - 732.1 Control Equipment - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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13. Accession number: 081911244881
Title: Fuzzy control of multi-dimensional damping system based on parallel mechanism
Authors: Zhu, Wei; Ma, Luzhong; Wu, Weiguang; Chen, Xiuxiang; Xie, Jun
Author affiliation: Jiangsu University, Zhenjiang 212013, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 127-130
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A mode of multi-dimensional damping platform was established, in which parallel mechanism was used as main mechanism and MR damper was used as performer. A semi-active controller was designed by using fuzzy algorithm, and it was applied to control three branches of the mechanism. The system was simulated by ADAMS and Matlab software. The simulated vibration effect under on fuzzy controller was compared with that under off controller. It was found that the acceleration peak value and mean square root value of the moving platform all dropped about 40%. The results showed that the damping system and control algorithm were effective to multi-dimensional damping.
Number of references: 5
Ei main heading: Mechanisms
Ei controlled terms: Computer simulation - Damping - Fuzzy control - MATLAB - Vibration control
Uncontrolled terms: Parallel mechanism - Multi-dimensional damping - MR damper - ADAMS software
Ei classification codes: 601.3 Mechanisms - 731.3 Specific Variables Control
Treatment: Theoretical (THR)
Database: Compendex
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14. Accession number: 081911244882
Title: Topology optimization of 3-D flexible micro-positioning design
Authors: Yang, Shu; Guo, Dongming; Mi, Dahai
Author affiliation: Dalian University of Technology, Dalian 116024, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 131-133 143
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Structural topology optimization with the use of finite element analysis has been studied and applied in the design of three dimension micro-positioning. A mathematical model of topology optimization for three dimension micro-positioning, which has displacement objective considering stress constraints is proposed. Sensitivity method and OC method are applied to solve this topology optimization problem. Checkboard patterns and mesh-dependency generated in optimization process, and filtering approach is adapted to solve these problems. In the end, a three dimension micro-positioning topology optimization design is presented to show the feasibility of the proposed approach, and the simulation by ANSYS proves the good performance of the micro-positioning.
Number of references: 5
Ei main heading: Mechanisms
Ei controlled terms: Computer simulation - Finite element method - Mathematical models - Shape optimization
Uncontrolled terms: Micro-positioning - Flexible mechanism - Topology optimization
Ei classification codes: 601.3 Mechanisms - 723.5 Computer Applications - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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15. Accession number: 081911244883
Title: Theoretical model of accuracy loss equality design in dynamic measuring system
Authors: Liu, Fangfang; Fei, Yetai; Jiang, Minlan
Author affiliation: Hefei University of Technology, Hefei 230009, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 134-136
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: When the practical dynamic measuring system is abated or discarded as useless, some parts of the system can not work longer, while other parts still have good situation, and it may lead to a lot wastes of resource. Based on the whole-system dynamic accuracy theory, traces and decomposes the whole dynamic error, the uniform loss theoretical model for dynamic measurement systems was put forward to direct the uniform loss design according to a principle of equality life design. The most efficiency can be realized for every error source simultaneous loss during the uniform loss design.
Number of references: 6
Ei main heading: Product design
Ei controlled terms: Functions - Measurement errors - Neural networks
Uncontrolled terms: Dynamic measuring - Accuracy loss equality theory - Error decomposition - Error tracing
Ei classification codes: 913.1 Production Engineering - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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16. Accession number: 081911244884
Title: Analysis of influences of the error on the gear stiffness
Authors: Chen, Lifeng; Wu, Xiaoling; Luo, Shanming
Author affiliation: Chongqing University, Chongqing 400044, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 137-139
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Incorporating the error into the tooth stiffness model of spur gear, the variety law of gear stiffness was obtained based on material mechanics method, and the effects of the error on the gear stiffness were analyzed. The mechanical method was employed to compute the tooth stiffness instantaneously. The tooth stiffness was calculated as an effective function, which also include the effect of error by the difference of the y-axis. The method was illustrated via two error examples, and the effects of the error on the stiffness of different plots on the tooth were examined analytically. The results show that the effects of the error on the stiffness increases with the increase of error, the influences of the error on the dedendum stiffness is more evident than that on the addendum, and the influences on stiffness of the driving gear is greater than that of the driven gear under the same error.
Number of references: 7
Ei main heading: Spur gears
Ei controlled terms: Errors - Stiffness - Transmissions
Uncontrolled terms: Tooth stiffness - Driving gear - Driven gear - Material mechanics method
Ei classification codes: 421 Strength of Building Materials; Mechanical Properties - 601.2 Machine Components - 602.2 Mechanical Transmissions - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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17. Accession number: 081911244885
Title: Error separating method of nano coordinate measuring machine
Authors: Yang, Hongtao; Fei, Yetai; Chen, Xiaohuai
Author affiliation: Anhui University of Science and Technology, Huainan 232001, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 140-143
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on the Nano-CMM structure, error distribution characteristic and accuracy demand, the micro three light beam planar reflector laser interferometer was selected to separate the Nano-CMM error. The error separating device was designed to realize the accurate adjustment of parallel move, beat, pitch and height, and the horizontal angle between the reflectors. The influence on the measurement result of the interferometer, which is created by using the 45 degree reflector to deflect the beam, was analyzed on principle. The error separating results indicate that the single-time separating of the standard indicating error and the deviant, pitch and beat error of the guide strip can be realized by the device. The additive error created by the heat, vibration and non real-time measurement of the common instruments is decreased via the error separating device. The error correcting precision using this method is five times more than that of the ordinary method.
Number of references: 7
Ei main heading: Coordinate measuring machines
Ei controlled terms: Design - Error analysis - Experiments - Interferometers
Uncontrolled terms: Nano coordinate measuring machine - Error separating device
Ei classification codes: 921 Mathematics - 943.3 Special Purpose Instruments
Treatment: Theoretical (THR); Experimental (EXP)
Database: Compendex
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18. Accession number: 081911244886
Title: Undercut fault detection on free surface CNC machining with end mill
Authors: Xu, Shuxin; Wang, Yiqiang; Zhu, Peixing
Author affiliation: Jilin University, Changchun 130025, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 144-147
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: This paper focuses on the undercut failure between end mill and work-piece in CNC machining of free surface, and presents a new methodology to detect the undercut failure based on the Wavelet analysis. By the typical experiments of the undercut failure, the electric current signal of the spindle motor was monitored and analyzed based on the Daubechies Wavelet transform. The Wavelet smoothing of the monitored signal was used to extract the frequency-band feature. The critical cutting power corresponding to the undercut failure was captured and the undercut feature was extracted with the time-frequency tracking capability of Wavelet transform. Finally, the occurring time of the undercut failure was exactly recognized. The experimental results demonstrated that the undercut failure in CNC free-surface milling could be detected with Wavelet analysis.
Number of references: 8
Ei main heading: Machining
Ei controlled terms: Fault detection - Mathematical models - Milling cutters - Wavelet analysis
Uncontrolled terms: CNC machining - Free surface - End mill - Undercut - Failure detection
Ei classification codes: 603.1 Machine Tools, General - 604.2 Machining Operations - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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19. Accession number: 081911244850
Title: Coordination control of active front wheel steering and ABS
Authors: Wang, Qidong; Wang, Xia; Chen, Wuwei; Qin, Weihua
Author affiliation: Hefei University of Technology, Hefei 230009, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 1-4 18
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A coordination control method of vehicle active front wheel steering and ABS on steering and braking conditions was presented. At first, steering system controller and ABS controller were designed separately, and then an upper coordination controller was set up based on an idea of delaminating control in order to coordinate the two subsystems. The simulation results showed that: the vehicle had better steering stabilization and braking performance by applying this method to control the active front wheel steering and ABS, the root mean square value of vehicle raw rate decreased from 0.0461 rad/s to 0.0382 rad/s, the root mean square value of lateral acceleration decreased from 0.9352 m/s2 to 0.7886 m/s2, the brake distance decreased from 23, 9845 m to 23, 1092 m, the root mean square value of slip rate of front wheel increased from 0.1968 to 0.1975, and slip rate of rear wheel increased from 0.1965 to 0.1981.
Number of references: 11
Ei main heading: Automobiles
Ei controlled terms: Braking - Computer simulation - Control equipment - Mathematical models - Steering
Uncontrolled terms: Active front wheel steering - Anti-lock braking system - Coordination control
Ei classification codes: 662.1 Automobiles - 723.5 Computer Applications - 731 Automatic Control Principles and Applications - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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20. Accession number: 081911244887
Title: Formalized description of product conceptual space and appraisal method of conceptual design plan
Authors: Zhang, Jianjun; Zhang, Li; Xu, Juan; Ren, Qile
Author affiliation: Hefei University of Technology, Hefei 230009, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 148-153
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Aim at the deficiency of product conceptual design solving presently, a conceptual design process model was established based on the theory of axiomatic design, and a formalized description of product conceptual space was proposed. The description of product concept space combined with BOM was finished firstly. Subsequently, the plan appraisal method based on axiomatic design was designed. Finally, a case was given to validate that the model could efficiently make up for the disadvantage of information axiom during plan decision-making process. The results indicated that the description of product concept space was optimized by the appraisal method, and the product conceptual design solving efficiency was improved.
Number of references: 6
Ei main heading: Conceptual design
Ei controlled terms: Mathematical models - Product design - Product development
Uncontrolled terms: Axiomatic design - Conceptual space - Formalized description
Ei classification codes: 913.1 Production Engineering - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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21. Accession number: 081911244888
Title: Task scheduling of product cooperative development based on multi-objective optimization
Authors: Jiang, Zengqiang; Liu, Mingzhou; Zhao, Han; Ge, Maogen
Author affiliation: Hefei University of Technology, Hefei 230009, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 154-158 162
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Aiming at lack of study of the task scheduling for product cooperative development, a new theory of task scheduling for product cooperative development based on multi-objective optimization has been advanced, and the corresponding evaluation procedure for comprehensive evaluation indexes was put forward. Then, aimed at the peculiarity of the task scheduling arithmetic, the arithmetic of task scheduling based on hybrid particle swarm optimization was detailed. At last, the result of an instance with above theory was brought out, and the feasibility and advantage of this theory has been proved by way of comparing the different results with multi-objective optimization and single-objective optimization.
Number of references: 5
Ei main heading: Product development
Ei controlled terms: Computer simulation - Multiobjective optimization - Particle swarm optimization (PSO) - Scheduling algorithms
Uncontrolled terms: Product cooperative development - Task scheduling - Hybrid particle swarm optimization - Fuzzy comprehensive evaluation
Ei classification codes: 723.5 Computer Applications - 912.2 Management - 913.6 Product Development; Concurrent Engineering - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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22. Accession number: 081911244851
Title: Simulation of control strategy for HEV coupler with planetary mechanism
Authors: Zou, Naiwei; Liu, Jin'gang; Zhou, Yunshan; Zhang, Youkun; Huang, Wei; Cai, Yuanchun
Author affiliation: Jilin University, Changchun 130025, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 5-9
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The principle of coupler with planetary mechanism was elaborated. The coupler can decide the HEV driving mode through a set of clutches engaging and disengaging. The rotation and torque composition of coupler was analyzed through the means of virtual level. The fuzzy algorithm was proposed to control the clutches for desired transient and smooth performance. The acceleration pedal travel and its change rate were used as input, and the output were clutches initial pressure and the change rate of engaging pressure. The simulation model of the coupler with planetary mechanism was established finally. The simulation results showed that this control strategy could meet the driver operating demands, increase HEV speed and switch driving mode smoothly under different driving conditions.
Number of references: 8
Ei main heading: Electric vehicles
Ei controlled terms: Algorithms - Automobile drivers - Clutches - Computer simulation - Fuzzy control
Uncontrolled terms: Hybrid electric vehicle (HEV) - Coupler - Planetary mechanism
Ei classification codes: 602.2 Mechanical Transmissions - 662.1 Automobiles - 723.5 Computer Applications - 731 Automatic Control Principles and Applications - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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23. Accession number: 081911244852
Title: Finite element analysis on three-dimensional structural of run-flat tire insert
Authors: Yang, Xin; Tong, Jin; Chen, Donghui; Zhang, Shujun; Chen, Bingcong
Author affiliation: Agricultural University of Hebei, Baoding 071001, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 10-13
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Using Autodesk Inventor Professional (AIP) system, a three-dimensional parameterized model of insert and the virtual assemblage based on the standard rim and tire was established. The three-dimensional finite element analysis (FEA) of insert was performed through ANSYS technology embedded in AIP analysis types. During the FEA progress, vehicle velocity, insert material, loads and forces were defined and added on the insert, Subsequently, the three-dimensional FEA mesh was created, and stress, displacement, safety factor were obtained after finite element calculation. Finally, some modifications of insert configuration were carried out according to the analysis results. Through analysis of the new insert model, the results showed that the von-stress and the maximal principal stress were less than the yield limit of insert material, the safety factor was enhanced and the desired results was achieved, which could provide vehicle with enough safety performances.
Number of references: 12
Ei main heading: Tires
Ei controlled terms: Computer simulation - Finite element method - Safety factor - Stresses - Vehicles
Uncontrolled terms: Run-flat tire - Insert - Autodesk Inventor Professional (AIP) - ANSYS software
Ei classification codes: 421 Strength of Building Materials; Mechanical Properties - 662.1 Automobiles - 723.5 Computer Applications - 818.5 Rubber Products - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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24. Accession number: 081911244889
Title: Design object planning of vehicle NVH performance improvement
Authors: Liu, Jie; Li, Chaofeng; Sun, Wei; Wen, Bangchun
Author affiliation: Northeastern University, Shenyang 110004, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 159-162
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Based on 7D design planning and house of quality, a model of design object planning was presented. The correlation among engineering characteristics was considered sufficiently in the model. At the same time, each customer requirements were ensured to match the corresponding engineering characteristics with the limited resource, and this planning model was applied successfully to the NVH improvement design of vehicle. The results showed that customer requirements were satisfied, and the resource and technology were configured well.
Number of references: 14
Ei main heading: Automobiles
Ei controlled terms: Acoustic noise - Customer satisfaction - Product design - Vibrations (mechanical)
Uncontrolled terms: Design planning - House of quality - Object planning
Ei classification codes: 662.1 Automobiles - 751.4 Acoustic Noise - 913.1 Production Engineering - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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25. Accession number: 081911244890
Title: Design and experiment of welding with trailing peening system based on electromagnetism control
Authors: Zhao, Jianguo; Fan, Yunfei; Ma, Yuejin; Hao, Jianjun; Zhao, Xiaoshun; Shen, Yuzeng
Author affiliation: Agricultural University of Hebei, Baoding 071001, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 163-166
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Welding with trailing peening (WWTP) currently has a problem that the peening force and the peening frequency can not be accurately adjusted for effectively controlling the welding stress and distortion. In order to solve this problem, a new WWTP system was developed based on the electromagnetism control technique. This system applied the technology of constant frequency pulse width modulation (PWM) to design the control circuit. The peening force was adjusted between 0 and 1000 N, and the peening frequency ranged from 0 to 25 Hz, The experimental results showed that the transverse and longitudinal residual stresses were decreased by 90% on average respectively when the peening force was 700 N and the peening frequency was 2 Hz, compared with the traditional welding system without trailing peening.
Number of references: 8
Ei main heading: Welding
Ei controlled terms: Clamping devices - Experiments - Pulse width modulation - Residual stresses - Structural design
Uncontrolled terms: Distortion - Welding with trailing peening (WWTP) - Control circuit - Peening force - Peening frequency
Ei classification codes: 408.1 Structural Design, General - 421 Strength of Building Materials; Mechanical Properties - 538.2 Welding
Treatment: Experimental (EXP)
Database: Compendex
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26. Accession number: 081911244891
Title: Feature extraction of combustion noise in internal combustion engine based on wavelet transform technology
Authors: Xu, Hongmei; Hao, Zhiyong; Guo, Lei; Jing, Guoxi
Author affiliation: Zhejiang University, Hangzhou 310027, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 167-170 174
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Taking a six-cylinder diesel engine as the example, noise signals were recorded in different working conditions. Based on the wavelet packet decomposition and coefficient reconstruction of the recorded noise signals, signals in various frequency bands were extracted. Subband signals relevant to the engine combustion process were combined and reconstructed, and noise signals resulted from the combustion excitation were obtained. Moreover, the continuous complex wavelet transform was adopted to analyze the reconstructed signal. The three-dimensional wavelet power spectrum was also calculated to investigate the combustion condition of each cylinder and extract the related information. The analysis results show that the signal energy of combustion noise accounting for small proportion mainly distributes in the high frequency region of 20.480-24.576 kHz, when engine works at the speed of 2200 r/min with full load. At the idle condition of 650 r/min, combustion noise signal energy is mainly concentrated in the medium and low frequency band of 1024-2521 Hz, and has a larger contribution to engine noise.
Number of references: 5
Ei main heading: Internal combustion engines
Ei controlled terms: Acoustic noise - Combustion - Feature extraction - Signal processing - Wavelet transforms
Uncontrolled terms: Combustion noise - Noise signal
Ei classification codes: 521.1 Fuel Combustion - 612.1 Internal Combustion Engines, General - 716.1 Information Theory and Signal Processing - 751.4 Acoustic Noise
Treatment: Theoretical (THR)
Database: Compendex
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27. Accession number: 081911244892
Title: Fuzzy evaluation analysis on cooling system failure mode criticality of machining center
Authors: Wang, Guiping; Jia, Yazhou; Shen, Guixiang; Zhang, Riming
Author affiliation: Jilin University, Changchun 130025, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 171-174
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The failure information of the cooling system of machining center is fuzzy frequently. The normal analysis method of failure mode critically only considers the failure probability and serious degree. When the testing and the maintainability of failure are considered, the failure mode criticality can not be accurately analyzed by FMECA. The fuzzy theory was proposed to analyze the failure mode criticality. It comprehensively included the failure probability, the failure serious degree, the testing and the maintainability of failure, which could carried out the qualitative question quantitatively. The failure mode criticality of cooling system of a machining center was calculated to determine the direction of improving reliability. The results showed that the criticality of jam stem was serious, which was consistent with the facts.
Number of references: 8
Ei main heading: Machining centers
Ei controlled terms: Cooling systems - Failure modes - Maintainability - Membership functions - Reliability - Testing
Uncontrolled terms: Criticality - Fuzzy comprehensive evaluation
Ei classification codes: 603.1 Machine Tools, General - 616.1 Heat Exchange Equipment and Components - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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28. Accession number: 081911244853
Title: Idle speed control strategy and parameters tuning of hydrogen-fueled engine
Authors: Yuan, Yinnan; Zhu, Lei; Wang, Cunlei; Chen, Duhong
Author affiliation: Jiangsu University, Zhenjiang 212013, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 14-18
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A hydrogen-fueled engine was developed. The idle speed control strategy of hydrogen-fueled engine was established via the theoretical analyses on the mechanism of backfire phenomena of idle speed state. Through a great deal of idle speed experiments, parameters (position of electronic throttle, spark advance angle, ignition dwell angle, and hydrogen injection timing) optimization and the causes of speed fluctuation and backfire were analyzed. The idle speed control stability of hydrogen-fueled engine was studied with increment PID arithmetic. Meantime, PID parameters (proportion coefficient, integral coefficient, differential coefficient and control period) were regulated to favorable values. The experimental results showed that the high stability of both high and low idle speeds was realized and the target of optimization was achieved.
Number of references: 8
Ei main heading: Engines
Ei controlled terms: Algorithms - Computer simulation - Hydrogen fuels - Speed control - Three term control systems
Uncontrolled terms: Idle speed - Control strategy - Parameter tuning
Ei classification codes: 522 Gas Fuels - 612 Engines - 723.5 Computer Applications - 731.3 Specific Variables Control - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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29. Accession number: 081911244854
Title: Optimization on ignition timing control of hydrogen-fueled engines
Authors: Wang, Lijun; Si, Aiguo; Liu, Haichao; Yang, Zhenzhong; Ge, Lindong
Author affiliation: PLA Information Engineering University, Zhengzhou 450002, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 19-22
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: On the basis of experiment on hydrogen-fueled engine, an advanced ignition angel optimization model, which was the function of rotating speed and loading, was established by the input-output satisfactory relation of radial basis function (RBF) neural network. Digital signal processor (DSP) with quick operation to digital signal was applied to keep optimized control over the advanced ignition angel. Moreover, the calculating results with RBF neural network were contrasted with the experimental results. The results indicated that the optimized control model could accurately forecast the ignition timing of the hydrogen-fueled engine.
Number of references: 6
Ei main heading: Engines
Ei controlled terms: Computer simulation - Digital signal processors - Hydrogen fuels - Ignition - Mathematical models - Optimization - Radial basis function networks
Uncontrolled terms: Ignition timing - Control optimization - Radial basis function neural network
Ei classification codes: 521.1 Fuel Combustion - 522 Gas Fuels - 612 Engines - 723.5 Computer Applications - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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30. Accession number: 081911244855
Title: Experimental study on the knock control of HCCI engine by methanol and ethanol additives at high load
Authors: He, Chao; Xu, Jinhua; Ji, Changwei; He, Hong
Author affiliation: Beijing University of Technology, Beijing 100022, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 23-27 40
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The effects of methanol and ethanol additives on homogeneous charge compression ignition (HCCI) engine knock were investigated by add small quantity of methanol and ethanol to the base fuel (PRF90). Six test fuels were confected with the volume fractions of 1%, 3% and 5% containing methanol and ethanol, respectively, HCCI combustion tests were conducted on the fourth cylinder of a modified 4-cylinder diesel engine. The experimental results showed that, under steady engine speed of 1400 r/min and at the same fuel injection quantity per cycle, with the increase of the volume fractions of methanol and ethanol added, the peak values of HCCI combustion cylinder pressures and heat release rates decreased gradually, causing combustion duration increased, knock effectively controlled, and load range enlarged. At the small volume fraction, methanol is better than ethanol in controlling engine knock, and methanol is much better than ethanol with the increase of the volume fraction. However, the misfire limits for the fuels containing methanol and ethanol are narrower than that for the base fuel, resulting in more possibility of engine misfire. For the tradeoff of knock and misfire, the volume fraction of methanol or ethanol in the base fuel needs to be about 1%.
Number of references: 8
Ei main heading: Engines
Ei controlled terms: Additives - Combustion knock - Combustion - Ethanol fuels - Methanol fuels - Volume fraction
Uncontrolled terms: Homogeneous charge compression ignition (HCCI) engine - Knock
Ei classification codes: 521.1 Fuel Combustion - 523 Liquid Fuels - 612 Engines
Treatment: Theoretical (THR)
Database: Compendex
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31. Accession number: 081911244856
Title: Linearization research on hydraulic actuator of diesel engine active vibration isolation system
Authors: Liu, Xueguang; Xiao, Bin; Liu, Zhigang; Yang, Tiejun; Gao, Zhongfeng
Author affiliation: Harbin Engineering University, Harbin 150001, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 28-31
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Via a pre-compensator (PCMRAIC) model, the reference adaptive inverse control method was presented and the hydraulic actuator non-linear problem of the diesel engine active vibration isolation system was studied. Four different pure tone sinusoidal signals were selected randomly from [10.110] as the stimulating input signal for the hydraulic actuator. Simulation and experiment were conducted through the PCMRAIC control strategy to realize the linearization control. As a result, the control effect was strengthened with the increase of the stimulating signal inputting frequency. Other harmonic was eliminated at the frequency of 88.52 Hz, and then the best control effect was realized.
Number of references: 5
Ei main heading: Diesel engines
Ei controlled terms: Actuators - Algorithms - Computer simulation - Linearization - Vibration control
Uncontrolled terms: Active vibration isolation - Hydraulic actuator
Ei classification codes: 612.2 Diesel Engines - 723.5 Computer Applications - 731.3 Specific Variables Control - 732.1 Control Equipment - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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32. Accession number: 081911244893
Title: Review of end-effectors in fruit and vegetable harvesting robot
Authors: Li, Qinchuan; Hu, Ting; Wu, Chuanyu; Hu, Xudong; Ying, Yibin
Author affiliation: Zhejiang Sci.-Technol. University, Hangzhou 310018, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 175-179 186
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Research progress and features of various end-effectors for fruit-vegetable harvesting are reviewed. It is pointed out that the conflict between the universal applicability of the end-effectors for fruit-vegetable harvesting and system cost as well as application cost is a main factor restricting the future development and application of fruit-vegetable harvesting robot in China. The underactuated multi-fingered hand is proposed as the end-effector for fruit-vegetable harvesting, and then a detailed review of the research progress of underactuated multi-fingered hand is presented. The feasibility of using the underactuated multi-fingered hand in fruit-vegetable harvesting is illustrated in terms of mechanism features, grasping modes and comprehensive costs.
Number of references: 34
Ei main heading: Robot applications
Ei controlled terms: End effectors - Fruits - Harvesting - Reviews
Uncontrolled terms: Harvesting robot - Underactuated multi-fingered hand
Ei classification codes: 731.6 Robot Applications - 821.3 Agricultural Methods - 821.4 Agricultural Products
Treatment: General review (GEN)
Database: Compendex
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33. Accession number: 081911244857
Title: Stability and fuel properties of rice bran oil biodiesel-water emulsion fuel
Authors: Dong, Ying; Lin, Lin; Xu, Ziming
Author affiliation: Jiangsu University, Zhenjiang 212013, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 32-36
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The emulsification technology was applied to prepare two-phase W/O and three-phase O/W/O biodiesel emulsions. The effects of emulsifier dosage, temperature, HLB value on the emulsion stability, fuel properties of emulsion and emission were investigated by experiment. The experimental results showed that emulsifier dosage 0.5%, temperature 30°C and surfactant mixture when aHLB=13 produced the highest emulsification stability, while aHLB=6 produced the lowest stability and the most significant extent of water-oil separation among the various HLB values for O/W/O emulsion. In addition, it was found that the W/O emulsion had a smaller mean droplet size and lower volumetric fraction of the dispersed phase than those of O/W/O emulsion respectively, and the heating value is higher than that of O/W/O emulsion and neat biodiesel if water content was deducted from the calculation of the heating value. The brake specific fuel consumption of emulsions was higher than that of neat biodiesel and diesel, CO emissions of emulsions were higher than those of neat biodiesel, but were lower than those of diesel, NOx emissions of emulsions were lower than those of biodiesel and diesel.
Number of references: 10
Ei main heading: Fuels
Ei controlled terms: Biodiesel - Diesel fuels - Emulsification - Emulsions - Fuel consumption - Stability
Uncontrolled terms: Rice bran oil - Fuel properties
Ei classification codes: 521.1 Fuel Combustion - 523 Liquid Fuels
Treatment: Experimental (EXP)
Database: Compendex
Compilation and indexing terms, ? 2007 Elsevier Inc. All rights reserved
34. Accession number: 081911244858
Title: Error analysis on measuring the moment of inertia of complex shaped components with trilinear pendulum
Authors: Zhang, Daisheng; Hu, Xiliang; Yuan, Ling
Author affiliation: Hefei University of Technology, Hefei 230009, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 37-40
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The principle and procedures of trilinear pendulum which is used to test the moment of inertia of complex components are elaborated. The equations of moment of inertia are presented to obtain the product of inertia. By analyzing the equations deduction of trilinear pendulum, the simplified error can be 0.28%. The parameters of the radius of upper and down round plates, the mass of objects, the cycle of swinging can be calculated through the method of trilinear pendulum, but the errors are greater and the aggregated measuring errors of the parameters can reach 5% or above. Based on the detailed analysis and provement, the methods of decreasing errors are proposed.
Number of references: 6
Ei main heading: Measurements
Ei controlled terms: Automobile engines - Error analysis - Measurement errors
Uncontrolled terms: Complex shaped components - Trilinear pendulum - Moment of inertia
Ei classification codes: 661.1 Automotive Engines - 921 Mathematics - 943 Mechanical and Miscellaneous Measuring Instruments
Treatment: Theoretical (THR)
Database: Compendex
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35. Accession number: 081911244859
Title: Control software design of engine test analyzer
Authors: Zhao, Ya'nan; Zhao, Futang; Fan, Yan
Author affiliation: Beijing Institute of Technology, Beijing 100081, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 41-45 36
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: On the software platform of LabVIEW, control software of engine test analyzer was designed. The control software includes sensors test module, ignition system test module, multi-channel recorder module of electronic signal and engine oscillograph module. The analysis, processing, real-time display, storage and read function of engine signals were accomplished by engine test analyzer software program like the traditional hardware equipment. The reliability and anti-interference ability were increased greatly, the accuracy of every parameter and the stability of the test were realized, and the software function could be adjusted according to the demand. Furthermore, the software of test analyzer has a function of secondary development.
Number of references: 11
Ei main heading: Automobile engines
Ei controlled terms: Failure analysis - Ignition systems - Reliability - Sensors - Signal processing - Software design - Testing
Uncontrolled terms: Test analyzer - Control software - LabVIEW
Ei classification codes: 422.2 Test Methods - 661.1 Automotive Engines - 723.1 Computer Programming
Treatment: Theoretical (THR)
Database: Compendex
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36. Accession number: 081911244860
Title: Design of a variable rate irrigating hill-seeder
Authors: Yang, Shuming; Yang, Qing; Yang, Chenghai; Xing, Zhen; An, Yunfei
Author affiliation: Northwest A and F University, Yangling 712100, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 46-48 89
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A variable rate precision irrigating hill-seeder was designed, which could change the amount of irrigating water automatically according to the soil moisture content of the field. A control system integrating single-chip computer, global positioning system (GPS), geographic information system (GIS) and variable rate application (VRA) technologies was developed, The system employed a high speed single-chip W78E58 unit as the control center, a high capacity U-disk for GIS data transfer, and a self-developed GPS receiver as the locating device. The system could detect a falling seed through a photoelectric sensor installed insider the collector of the seeder, and then opened an electromagnetic valve to control water delivery so that the seed and water could fall at the same time and place. The amount of water was determined by the minimum soil moisture content required for seed germination. The control system was adapted to a maize hill seeder. A static calibration experiment showed that the controller had good linearity. The detection rate of the photoelectric sensor for the maize seeds reached 99.5%, which indicated that the control system had high control accuracy.
Number of references: 11
Ei main heading: Irrigation
Ei controlled terms: Computer programming - Control systems - Design - Geographic information systems - Global positioning system - Seed - Soil moisture
Uncontrolled terms: Hill seeder - Variable rate irrigating
Ei classification codes: 723.1 Computer Programming - 731.1 Control Systems - 821.3 Agricultural Methods
Treatment: Theoretical (THR)
Database: Compendex
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37. Accession number: 081911244861
Title: Research on parametric design system of plow
Authors: Yu, Guizhen; Wu, Chengwu; Ding, Nenggen; Wang, Jian
Author affiliation: Beihang University, Beijing 100083, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 49-51 36
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: To improve plow design efficiency, the parametric design and knowledge base technology were applied. Based on the plow twelve-parameter mathematical model and plow surface composition curve equation, the plow curve equation and the plow care equation were derivated. The knowledgebase was introduced into the plow parametric design to express the expert experiments and design experiments, which were necessary to the plow parametric design. A case of plow parametric design system showed that the developed software system only needs three parameters: farming width, depth and speed, the 2D and 3D engineering drawings of the plow can be created automatically, and design period is shorted from several months to about twenty minutes.
Number of references: 5
Ei main heading: Agricultural machinery
Ei controlled terms: Computer aided design - Computer applications - Mathematical models - Research - Structural design
Uncontrolled terms: Plow surface - Parametric design
Ei classification codes: 408.1 Structural Design, General - 723.5 Computer Applications - 821.1 Agricultural Machinery and Equipment - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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38. Accession number: 081911244862
Title: Numerical calculation of turbulent flow and performance experiment of mixed-flow pump impeller
Authors: Yuan, Chunyuan
Author affiliation: Jiangsu University, Zhenjiang 212013, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 52-55
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A mixed-flow pump hydraulic model was designed using velocity modulus and similar conversion method. To investigate the 3-D turbulent flows in impeller passage of mixed-flow pump, its blades were modeled by Pro/E software with bicubic Bezier curve surfaces. Utilizing Gambit software to generate the unstructured grids of the passage in impeller and define its boundary conditions, the internal 3-D uncompressible turbulent flows of impeller at design condition were simulated by Fluent software on the basis of the Reynolds averaged NavierStokes equations, standard kε turbulent model and SIMPLE arithmetic. The calculated velocity distributions and pressure distributions of the turbulent flow in the mixed-flow pump were obtained and analyzed. Finally, the performance tests were carried out, and the experimental results showed that the pump performance could meet the design requirements.
Number of references: 9
Ei main heading: Impellers
Ei controlled terms: Boundary conditions - Computer simulation - Flow fields - Mathematical models - Pumps - Turbulent flow
Uncontrolled terms: Mixed-flow pump - Numerical calculation - Performance experiment
Ei classification codes: 601.2 Machine Components - 618.2 Pumps - 631.1 Fluid Flow, General - 723.5 Computer Applications - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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39. Accession number: 081911244863
Title: Design and experiment of on-line moisture content metering device for paddy drying process
Authors: Li, Changyou
Author affiliation: South China Agricultural University, Guangzhou 510642, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 56-59
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: In paddy drying process, the moisture content measurement is disturbed by the shape, thickness, density and temperature fluctuation of paddy, the ununiformity of interior moisture content distribution and etc. In order to get an accurate moisture content of the test single kernel paddy drying process, a kind of on-line moisture content metering technology and device was developed, Based on multi-channel reelection circuit and analytical calculation, the non-linear problem of moisture content metering in drying process was resolved. The curves of voltage transferred from the resistance of paddy with different moisture contents to the time sequence, were obtained in dynamic process. And from them, it is concluded that the height of wave peak can be the measurement property when moisture content is less than 23.5%, and the curve boundary area can be measurement property when it is more than 23.5%. That is very helpful to promote detection accuracy. The reliability and practicality of the detecting technology and device was validated in different working conditions: the state of high temperature and high humidity in summer, and the state of low temperature, high dust and wide moisture distribution range in winter. The on-line measurement error is less than ±0.5%.
Number of references: 7
Ei main heading: Agricultural products
Ei controlled terms: Design - Drying - Experiments - Measurements - Moisture - Water content
Uncontrolled terms: Paddy - Moisture content - On-line detecting device
Ei classification codes: 821.4 Agricultural Products - 921 Mathematics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments
Treatment: Theoretical (THR); Experimental (EXP)
Database: Compendex
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40. Accession number: 081911244864
Title: Experimental study on the characteristics of high voltage electrostatic spraying locust-killing vehicle
Authors: Wang, Xiaoying; Luo, Tiqian; Wang, Zhentao; Kang, Can; Wen, Jianlong
Author affiliation: Jiangsu University, Zhenjiang 212013, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 60-62 66
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: A high voltage electrostatic spraying vehicle was developed to control locusts in agriculture and stockbreeding. The experiment of two-fluid spray nozzle was carried out and the relationship of control parameters was obtained. It was found out that the liquid flow and droplet diameter could be adjusted by changing the proportion between gas pressure and liquid pressure. Meanwhile, the integrated vehicle experiment was conducted to get vehicle characteristics and locust-killing effects. The experimental results showed that droplet diameter distribution and deposition distribution had two peaks in spraying direction, the locust-killing rate of the vehicle could reach 93%, and locust-killing effect with absorbing pesticide was better than that with touching pesticide.
Number of references: 5
Ei main heading: Pest control
Ei controlled terms: Computer applications - Experiments - Pesticide effects - Pesticides - Spraying
Uncontrolled terms: Locust killing vehicle - Electrostatic spraying - High voltage
Ei classification codes: 723.5 Computer Applications - 821.2 Agricultural Chemicals - 921 Mathematics
Treatment: Theoretical (THR); Experimental (EXP)
Database: Compendex
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41. Accession number: 081911244865
Title: Grey prediction fuzzy PID control of the feeding quantity in combine
Authors: Ji, Jiangtao; Wang, Rongxian; Fu, Lijun
Author affiliation: He'nan University of Science and Technology, Luoyang 471003, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 63-66
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: Aimed at the nonlinearity and complexity of combine control system, the grey prediction theory and the fuzzy PID control ideas were combined, a grey prediction mathematical model was established and a fuzzy PID controller with grey prediction was developed. It was applied to control the feeding quantity of combine. The simulation results showed that the fuzzy PID control algorithm with grey prediction had better performances for the control of the feeding quantity, which could improve the control quality and robustness of traditional PID control and fuzzy PID control.
Number of references: 9
Ei main heading: Combines
Ei controlled terms: Computer simulation - Feeding - Forecasting - Fuzzy control - Mathematical models - Robustness (control systems) - Three term control systems
Uncontrolled terms: Feeding quantity - Grey prediction theory - Fuzzy PID control
Ei classification codes: 723.5 Computer Applications - 731.1 Control Systems - 821.1 Agricultural Machinery and Equipment - 921 Mathematics
Treatment: Theoretical (THR)
Database: Compendex
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42. Accession number: 081911244866
Title: Design and experimental study on pick-up device of sugarcane leaf shattering and returning machine
Authors: Li, Ming; Wang, Jinli; Deng, Yiguo; Huang, Hui; Zhang, Jin; Song, Deqing
Author affiliation: Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524091, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 67-70 78
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: In order to solve the problem that the turning cutter of commonly used sugarcane leaf shattering and returning machine could not pick up the sugarcane leaf from the bottom of furrow, a pick-up device was designed. The inclined rod is connected to the positioning wheel rigidly, and both of them are aligned with the tractor wheel. The bottom end of inclined rod, touching with the soil surface, can pick up the sugarcane leaf from soil surface, lift to a certain height, and promote the feeding height. The power consumption of the machine was saved, and the pick-up rate and shattering rate were improved by 3.4%-4.3% and 9.4%-11.8% respectively. The pick-up device key structural parameters values were determined by theoretical analysis and field tests as follows: the inclined angle 40°-60° of inclined rod, and the distance 60-70 cm between the bottom end of inclined rod and the machine cover.
Number of references: 10
Ei main heading: Agricultural machinery
Ei controlled terms: Agricultural wastes - Design - Experiments
Uncontrolled terms: Shattering and returning machine - Pick up device - Sugarcane leaf
Ei classification codes: 821.1 Agricultural Machinery and Equipment - 821.5 Agricultural Wastes
Treatment: Theoretical (THR); Experimental (EXP)
Database: Compendex
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43. Accession number: 081911244867
Title: Saccharification experiment for extrusion cooked wheat used as beer adjunct
Authors: Shen, Dechao; Liu, Niya; Wang, Guoqing
Author affiliation: Shandong University of Technology, Zibo 255091, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 71-74
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: The influence regularity of the parameters of the extrusion cooking system for wheat used as beer adjunct on indexes observed was studied by experiments. These parameters include the diameter of nozzle, barrel temperature, moisture content percentage of the wheat, screw speed, and the distance from the internal surface of die plate to the end surface of the end of the whole screw. The indexes observed include the filtration speed of wort, the recoverable ratio of wort extract and iodine value of wort. The research results indicate the extruded wheat may be used as beer adjunct. Meanwhile the recoverable ratio of wort extract for extruded wheat is 74.38% which is more than that of the traditional non-extruded wheat, when the diameter of nozzle is 12 mm, barrel temperature is 60°C, moisture content percentage of wheat is 20%, screw speed is 200 r/min, and the distance from the internal surface of die plate to the end surface of the end of the whole screw is 15 mm.
Number of references: 19
Ei main heading: Agricultural products
Ei controlled terms: Experiments - Extrusion - Food processing - Saccharification - Statistical tests
Uncontrolled terms: Wheat - Cooking - Beer adjunct
Ei classification codes: 821.4 Agricultural Products - 822.2 Food Processing Operations - 922.2 Mathematical Statistics
Treatment: Experimental (EXP)
Database: Compendex
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44. Accession number: 081911244868
Title: Effects of extruding technological parameters on in vitro protein digestibility of flaxseed
Authors: Song, Chunfang; Mao, Zhihuai; Wang, Shuguang; Wu, Min
Author affiliation: Southern Yangtze University, Wuxi 214122, China
Serial title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated serial title: Nongye Jixie Xuebao
Volume: v 39
Issue: n 3
Issue date: March 2008
Publication year: 2008
Pages: p 75-78
Language: Chinese
ISSN: 1000-1298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, Beijing, 100083, China
Abstract: In order to study the effects of extruding technological parameters on in vitro protein digestibility of flaxseed, extruding experiments were carried out by SLG6718.5 type twin-screw extruder. The effects of temperature, moisture content, rotation speed of screw and feeding speed on in vitro protein digestibility of flaxseed were investigated respectively. The relations between in vitro protein digestibility and each parameter were obtained with normal orthogonal rotary regression method. Subsequently, the regression model of in vitro protein digestibility was established, and the microstructure of extruded flaxseed was also analyzed. According to the results, temperature and rotation speed of screw didn't have obvious influence on in vitro protein digestibility, but the interaction of them were obvious. The experimental results provided a useful formation to the industrial production of flaxseed extrusion.
Number of references: 13
Ei main heading: Seed
Ei controlled terms: Extruders - Flax - Food technology - Mathematical models - Microstructure - Proteins - Scanning electron microscopy
Uncontrolled terms: Flaxseed - Technological parameter - In vitro protein digestibility
Ei classification codes: 531.2 Metallography - 821.4 Agricultural Products - 822 Food Technology
Treatment: Experimental (EXP)
Database: Compendex
Compilation and indexing terms, ? 2007 Elsevier Inc. All rights reserved
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