2018年第3期共收錄53篇
1. Thermal Parameters Properties Evolution of Eucalyptus Pyrolysis Bio-char
Accession number: 20182605370902
Authors: Wang, Mingfeng (1); Chen, Zhiwen (1); Jiang, Enchen (1); Ren, Yongzhi (1); Wang, Donghai (2); Wang, Wei (1)
Author affiliation: (1) College of Materials and Energy, South China Agricultural University, Guangzhou; 510642, China; (2) College of Biological and Agricultural Engineering, Kansas State University, Manhattan; 66506, United States
Corresponding author: Jiang, Enchen(ecjiang@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 317-321
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In recent years, with the growth of population and shortage of fossil energy, the environmental pollution problem has become more severe. Eucalyptus planted in south China is a kind of biomass resource with large quantity and high quality. The thermochemical conversion of biomass (pyrolysis, gasification, or combustion) is one of the most promising non-nuclear forms of future energy. It is a renewable source of energy and has many advantages from the ecological point of view. Pyrolysis of wood is a very complicated physical and chemical process which can transform biomass into useful fuel, such as bio-char, bio-oil and gas. Studying its thermo-physical properties is of great significance for the design of the equipment, control of process parameters and quality of the product. In the self-designed fixed bed pyrolysis device, the eucalyptus wood chips were paralyzed in the temperature range of 150~850. The remaining bio-char proceeds to be tested for the thermal parameters, including solid yield, bulk density, volume energy density, specific heat and heat conductivity coefficient. The results showed that with the increase of temperature, the solid yield was decreased and the weight loss rate in temperature range of 150~350 was up to 31.40% per 100; the lower heating value (LHV) of samples was increased gradually. The LHV of bio-char at 750 was 95.53% higher than that of the raw eucalyptus. Bulk density was decreased first and then increased while the volume energy density (VED) was increased in the whole experimental temperature range. The VED of bio-char at 750 was up to 63.21% more intensive than the raw material. The specific heat and heat conductivity coefficient were closely related to the moisture content and pores structure in bio-char. With the increase of treated temperature, the specific heat of sample presented a U-shaped tendency which was decreased firstly and then increased significantly. The heat conductivity coefficient was increased according to exponential growth after slight decrease. The fitting equations of specific heat Cpand heat conductivity coefficient λ with temperature were obtained and the fitting degrees R2were 0.932 0 and 0.995 3, respectively. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Specific heat
Controlled terms: Biomass? - ?Calorific value? - ?Cracking (chemical)? - ?Ecology? - ?Heat conduction? - ?Population statistics? - ?Product design? - ?Pyrolysis? - ?Thermal conductivity? - ?Wood products
Uncontrolled terms: Environmental pollution problem? - ?Eucalyptus? - ?Evolution properties? - ?Heat-conductivity coefficients? - ?Thermal parameters? - ?Thermo-physical property? - ?Thermochemical Conversion? - ?Volume energy density
Classification code: 454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?641.1 Thermodynamics
Thermodynamics
? - ?641.2 Heat Transfer
Heat Transfer
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?811.2 Wood and Wood Products
Wood and Wood Products
? - ?913.1 Production Engineering
Production Engineering
Numerical data indexing: Percentage 3.14e+01%, Percentage 6.32e+01%, Percentage 9.55e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.038
Compendex references: YES
Database: Compendex
2. Design and Test of Adjustable Blades Side Deep Fertilizing Device for Paddy Field
Accession number: 20182605370872
Authors: Wang, Jinfeng (1); Gao, Guanbao (1); Wang, Jinwu (1); Yan, Dongwei (1)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Wang, Jinwu(jinwuw@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 68-76
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to improve the fertilization quality of deep fertilization for paddy field, an adjustable blades side deep fertilizing device for paddy field was designed. Structure parameters of fertilizer rate adjusting mechanism were optimized by using optimization software V1.0, which was developed for fertilizer rate adjusting mechanism of side deep fertilizing device for paddy field. The stress analysis was carried out for fertilizer rate adjusting mechanism, through which the output torque of stepper motor was determined greater than 680 N·mm. Simulation model was established for adjustable blades side deep fertilizing device, and virtual experiment of distributing fertilizer was carried out by using discrete element EDEM software to analyze the acting force of fertilizer particle on spiral steel wire and hairbrush, therefore, the output torque of the direct current motor of fertilizer cases and anti-blocking device was determined greater than 5 345 N·mm and 8 N·mm, respectively. Fertilization performance of groove wheel type and adjustable blade type side deep fertilizing device for paddy field were studied on JPS-12 type discharging seed performance detection test bench, through which the influence laws of the rotation speed and forward velocity of the groove wheel type side deep fertilizing device on fertilizer stability and uniformity were obtained, the influence laws of the opening diameter and the forward speed of adjustable blade type side deep fertilizing device for paddy field on fertilizer stability and uniformity were obtained. The test results showed that fertilizer stability and uniformity indexes of adjustable blade type side deep fertilizer device for paddy field can meet national standard requirements, the quality of fertilization was superior to that of groove wheel type side deep fertilizing device, and the fertilization ability can meet agronomic requirements. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Fertilizers
Controlled terms: Computer software? - ?DC motors? - ?Design? - ?Stepping motors? - ?Stress analysis? - ?Testing? - ?Virtual reality? - ?Wheels
Uncontrolled terms: Adjustable blades? - ?Adjusting mechanism? - ?Direct current motors? - ?Optimization software? - ?Paddy fields? - ?Performance detections? - ?Structure parameter? - ?Virtual experiments
Classification code: 601.2 Machine Components
Machine Components
? - ?705.3 Electric Motors
Electric Motors
? - ?705.3.2 DC Motors
DC Motors
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?951 Materials Science
Materials Science
Numerical data indexing: Torque 5.34e+00N*m, Torque 6.80e-01N*m, Torque 8.00e-03N*m
DOI: 10.6041/j.issn.1000-1298.2018.03.008
Compendex references: YES
Database: Compendex
3. Investigation on Temperature Control of Diesel Oxidation Catalyst Outlet
Accession number: 20182605370913
Authors: Liu, Hongqi (1); Gao, Ying (1); Ma, Bin (1); Li, Fangcheng (2); Yin, Yue (1); Xie, Tianchi (1)
Author affiliation: (1) State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun; 130025, China; (2) Tianjin LOVOL Engines Co., Ltd., Tianjin; 300400, China
Corresponding author: Gao, Ying(gaoying@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 387-392
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Diesel oxidation catalyst outlet temperature control is crucial for heat management to realize diesel particulate filter active regenerative control. Combined with the actual characteristics of DOC to analyze and research the heat transfer process and chemical reaction characteristics in DOC, a first-order plus delay response model was established for the DOC carrier outlet temperature control. And the model was verified by the carrier test data on the engine bench. The relationships were described by a linear equation between the exhaust flow and thermal response time constant and a hyperbola equation with exhaust flow rate and delay time constant. According to the system characteristics, a PID control strategy was developed based on the internal model control structure, and the delay part of the system response used two order Pade non symmetry approximation method to substitute. Based on the internal model control structure, a filter was proposed to establish. The filter can regulate the response time and system stability. And by turning the parameter of filter, it can calculate the parameters of PID. The proposed control strategy was tested by engine test bench. To test a dynamic control effects, a continuous variety working condition with significantly changes in the exhaust flow and the entrance temperature of DOC for testing, the outlet temperature can be controlled within ±20 at the target temperature of 575. The test results proved that the strategy was effective to control the temperature of oxidation catalyst outlet, and the strategy can provide a rational thermal management for DPF active regeneration. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 18
Main heading: Internal oxidation
Controlled terms: Catalysts? - ?Chemical analysis? - ?Engines? - ?Heat transfer? - ?Model predictive control? - ?Models? - ?Multivariable control systems? - ?Response time (computer systems)? - ?System stability? - ?Temperature ? - ?Temperature control? - ?Three term control systems
Uncontrolled terms: Approximation methods? - ?Diesel oxidation catalyst? - ?Diesel particulate filters? - ?Internal model control? - ?Internal modeling? - ?Outlet temperature control? - ?Reaction characteristics? - ?System characteristics
Classification code: 641.1 Thermodynamics
Thermodynamics
? - ?641.2 Heat Transfer
Heat Transfer
? - ?731.1 Control Systems
Control Systems
? - ?731.3 Specific Variables Control
Specific Variables Control
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?803 Chemical Agents and Basic Industrial Chemicals
Chemical Agents and Basic Industrial Chemicals
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?961 Systems Science
Systems Science
DOI: 10.6041/j.issn.1000-1298.2018.03.049
Compendex references: YES
Database: Compendex
4. Extraction for Oilseed Rape Based on Spectral Feature and Color Feature
Accession number: 20182605370883
Authors: Wang, Dong (1); Fang, Shenghui (1); Wang, Zheng (2)
Author affiliation: (1) School of Remote Sensing and Information Engineering, Wuhan University, Wuhan; 430079, China; (2) School of Engineering, Newcastle University, Newcastle; NE17RU, United Kingdom
Corresponding author: Fang, Shenghui(shfang@whu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 158-165
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Large scale management of spatial distribution of oilseed rape is essential for grain yield estimations, ensuring edible oil supply and sustainable agricultural management. Flowering period is the special growth stage of oilseed rape. Spectral feature of oilseed rape in this period changes largely. Furthermore, the sense of sight for oilseed rape also has a big difference against with other vegetation types during flowering period. Thus, spectral feature and color feature in the flowering stage can be set as the unique features for identifying oilseed rape as well as the basis of oilseed rape extraction. NGVI, a flowering-contained detecting indicator, was used to represent spectral feature of oilseed rape in the flowering period. H, S and V components were conducted as color feature of oilseed rape after processing colorimetric transformation from RGB color space to HSV color space. And then, the samples of oilseed rape and non-oilseed rape, which were interpreted on wide field view (WFV) images from Gaofen satellite no. 1 (GF-1) combined Google Earth images and field investigation, were analyzed to determine the thresholds of NGVI, H, S, and V successively. Afterwards, oilseed rape in Hubei Province of China in 2016 was extracted based on GF-1 WFV images that obtained in full-flowering stage, which was evaluated by confusion matrix and compared with traditional support vector machine (SVM) method. Meanwhile, the GF-1 WFV-estimated planting acreage of oilseed rape was validated against agricultural census data. As a result, the sample evaluation achieved 94.51% of overall accuracy and 0.89 of Kappa coefficient, which improved four percentage points and 0.1 compared with SVM method, respectively. The result against statistical data had-14.14% of relative error at provincial level as well as 0.837 (n=17) and 0.738 (n=83) of decision coefficients at municipal level and county level. Moreover, the method was applied on panchromatic and multi-spectral (PMS) image from GF-2 and validated by reference oilseed rape map. The relative error of oilseed rape extraction was-8.33% and spatial consistency was 91.67%. Therefore, this study proposed a simple, effective and robust oilseed rape extraction strategy in large-regional scale based on satellite imagery of full-flowering period. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 28
Main heading: Oilseeds
Controlled terms: Agricultural machinery? - ?Color? - ?Colorimetry? - ?Extraction? - ?Population statistics? - ?Satellite imagery? - ?Support vector machines
Uncontrolled terms: Flowering period? - ?GF-1 WFV? - ?HSV transformation? - ?NGVI? - ?Oil seed rape
Classification code: 655.2 Satellites
Satellites
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?741.1 Light/Optics
Light/Optics
? - ?802.3 Chemical Operations
Chemical Operations
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?821.4 Agricultural Products
Agricultural Products
? - ?941.4 Optical Variables Measurements
Optical Variables Measurements
Numerical data indexing: Percentage 9.17e+01%, Percentage 9.45e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.019
Compendex references: YES
Database: Compendex
5. Estimation of Evapotranspiration of Winter Wheat Based on Single and Dual Crop Coefficient Approaches under Sand-Gravel Mulching Conditions
Accession number: 20182605370895
Authors: Li, Yi (1, 2); Fu, Yaya (1, 2); Tang, Dexiu (1, 2); Li, Siyi (1, 2); Feng, Hao (1, 2)
Author affiliation: (1) College of Water Resources and Architecture Engineering, Northwest A&F University, Yangling; Shaanxi; 712100, China; (2) Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling; Shaanxi; 712100, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 261-270
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Field crop evapotranspiration (ETc) plays a key role in energy and water balance of agricultural systems, and the estimation of ETcunder the sand-gravel mulching conditions is vital for assessing the influences of sand-gravel mulching on field crops. In order to accurately estimate the evapotranspiration of winter wheat under the conditions of sand-gravel mulching, the dynamic observation system of the lysimeter under a rain shelter was established in Yangling, Shaanxi. The FAO-56 Penman-Monteith equation was used to calculate the reference crop evapotranspiration (ETo). A weighing lysimeter was used to measure actual ETcof winter wheat under the different sand-gravel mulching amounts. The single and dual crop coefficient approaches were adopted in conjunction with EToto estimate measured ETc. The results showed that a good linear relationship was obtained between single crop coefficient and sand-gravel mulching amounts at the three different growth stages of winter wheat. The equation can better simulate ETcof winter wheat under the sand-gravel mulching conditions. The ranges of determination coefficient (R2) between measured ETcand ETcS(ETcestimated by the single crop coefficient method) were 0.77~0.80 (in the first year) and 0.73~0.76 (in the second year), respectively. There was a good linear relationship between dual crop coefficient and sand-gravel mulching amounts. This relationship was introduced to modify the dual crop coefficient under sand-gravel mulching conditions. The modified dual crop coefficient approach can also better simulate ETcof winter wheat under different sand-gravel mulching amounts compared with the measured ETc. The ranges of R2between the measured ETcand the simulated ETcwere 0.83~0.88 (in the first year) and 0.87~0.92 (in the second year), respectively. The single crop coefficient approach simulated average evapotranspiration better than the dual crop coefficient approach, although the dual crop coefficient approach was more accurate on daily ETc. In conclusion, the single and dual crop coefficient approaches were still applicable for estimating the ETcof winter wheat under the sand-gravel mulching conditions, but it needed revision by using the measured data. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 43
Main heading: Crops
Controlled terms: Evapotranspiration? - ?Gravel? - ?Lysimeters? - ?Sand? - ?Soil surveys
Uncontrolled terms: Crop coefficient? - ?Determination coefficients? - ?Energy and water balance? - ?Penman-Monteith equations? - ?Penman-Monteith models? - ?Reference crop evapotranspirations? - ?Sand gravels? - ?Winter wheat
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?821.4 Agricultural Products
Agricultural Products
? - ?943.3 Special Purpose Instruments
Special Purpose Instruments
DOI: 10.6041/j.issn.1000-1298.2018.03.031
Compendex references: YES
Database: Compendex
6. Path Optimization Algorithm of 3D Printing Based on Fused Deposition Modeling
Accession number: 20182605370914
Authors: Han, Xingguo (1, 2); Song, Xiaohui (2, 3); Yin, Ming (1); Chen, Haijun (1); Yin, Guofu (1)
Author affiliation: (1) School of Manufacturing Science and Engineering, Sichuan University, Chengdu; 610065, China; (2) College of Mechanical Engineering, Guilin University of Aerospace Technology, Guilin; 541004, China; (3) Faculty of Engineering and Environment, University of Southampton, Southampton; SO171BJ, United Kingdom
Corresponding author: Yin, Guofu(gfyin@scu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 393-401 and 410
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In view of faults of the current 3D printing technology such as the long processing time and low production efficiency, a path optimization algorithm of 3D printing based on fused deposition modeling was developed. Because the slice contour of some printing parts was comprised of many closed curves, the starting point of each closed curve was determined by the nearest neighbor method and the 3D printing contour path planning was transformed into the trareling salesman problem. A contour path planning algorithm based on ant colony algorithm was developed in order to plan printing sequence of the contour paths reasonably. Parallel scanning method was adopted for filling the slice cross-section. Influence on printing efficiency and quality for different scanning angles was analyzed and optimal scanning angle was selected. The scanning area was divided into different areas and a region merging algorithm based on four-point method was developed. The printing sequence of the different areas was optimized by the nearest neighbor algorithm, which improved the scanning efficiency and molding quality. The experiment of printing parts was done by means of the path optimization algorithm. Compared with the traditional parallel scanning method, single layer contour path scanning lengths of the three parts were decreased by 19.5%, 12.5% and 10.7%, the printing time was decreased by 12.6%, 11.6% and 8.9% and the dimensional accuracy and surface quality were improved. The result showed that the path optimization algorithm was robust and effective and its efficiency was high. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Three dimensional computer graphics
Controlled terms: 3D printers? - ?Ant colony optimization? - ?Deposition? - ?Efficiency? - ?Layered manufacturing? - ?Merging? - ?Motion planning? - ?Scanning
Uncontrolled terms: 3-D printing? - ?Ant colony algorithms? - ?Fused deposition modeling? - ?Nearest neighbor algorithm? - ?Nearest neighbor method? - ?Production efficiency? - ?Region merging algorithms? - ?Region-merging
Classification code: 723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?745.1.1 Printing Equipment
Printing Equipment
? - ?802.3 Chemical Operations
Chemical Operations
? - ?913.1 Production Engineering
Production Engineering
? - ?913.4 Manufacturing
Manufacturing
? - ?921.5 Optimization Techniques
Optimization Techniques
Numerical data indexing: Percentage 1.07e+01%, Percentage 1.16e+01%, Percentage 1.25e+01%, Percentage 1.26e+01%, Percentage 1.95e+01%, Percentage 8.90e+00%
DOI: 10.6041/j.issn.1000-1298.2018.03.050
Compendex references: YES
Database: Compendex
7. WSN Monitoring System with Adaptive Transmitting Power Based on Low-power-consumption in Rice Fields
Accession number: 20182605370882
Authors: Wang, Weixing (1, 2); Chen, Huaqiang (1); Jiang, Sheng (1, 3); Tie, Fenglian (1); Sun, Baoxia (1); Yu, Jieping (1)
Author affiliation: (1) College of Electronic Engineering, South China Agricultural University, Guangzhou; 510642, China; (2) Guangdong Engineering Research Center for Monitoring Agricultural Information, Guangzhou; 510642, China; (3) Guangdong Modern Agricultural Science and Technology Innovation Center for Intelligent Orchard, Guangzhou; 510642, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 150-157
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To solve the problems occurring in surveying the farmland environment such as limited energy and different distances of communication among the nodes, a monitoring system with adaptive transmitting power for rice fields based on received signal strength indication (RSSI) and packet loss rate (PLR) was designed and a long-time, stable and highly reliable wireless sensor network (WSN) running this algorithm with low power consumption was established. In the aspect of hardware, to extend the network coverage and improve the stability of the system, the method of frequency heterogeneity was adopted to cluster the nodes and configure different antennas for different nodes. In the aspect of software, the mini embedded free real-time operating system (FreeRTOS) was selected to improve the utilization of CPU and prolong the working life of the clusters. Additionally, to reduce the power consumption, the mode of timed sleeping and waking as well as the power-down control of sensor were selected as the working pattern and the adaptive low-power-consumption mechanism were used on the basis of data deviation perception. The result of tests showed that the system can adaptively adjust the transmitting power to the minimum value which can meet the demand of the stability of communication (PLR was less than 1.3%) within the communication distance of 150 m according to the quality of current communication. In this situation, when the algorithms of adaptive transmitting power was adjusted to 8 dBm, 6 dBm and 3 dBm, respectively, from 10 dBm, the battery duration of nodes was increased by 11.9%, 21.4% and 33.3%. As the result revealed, the communication performance of the nodes was significantly better than those of three other nodes with different adaptive transmission power algorithms. Thus it can be seen that the system was highly stable and practical in the application of WSN for the monitoring of farmland environment. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 37
Main heading: Monitoring
Controlled terms: Computer operating systems? - ?Electric power utilization? - ?Farms? - ?Low power electronics? - ?Sensor nodes? - ?System stability? - ?Wireless sensor networks
Uncontrolled terms: Communication distance? - ?Communication performance? - ?Low-power consumption? - ?Monitoring system? - ?Real time operating system? - ?Received signal strength indication? - ?Rice fields? - ?Transmitting power
Classification code: 706.1 Electric Power Systems
Electric Power Systems
? - ?722 Computer Systems and Equipment
Computer Systems and Equipment
? - ?722.3 Data Communication, Equipment and Techniques
Data Communication, Equipment and Techniques
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?961 Systems Science
Systems Science
Numerical data indexing: Decibel_milliwatts 1.00e+01dBm, Decibel_milliwatts 3.00e+00dBm, Decibel_milliwatts 6.00e+00dBm, Decibel_milliwatts 8.00e+00dBm, Percentage 1.19e+01%, Percentage 1.30e+00%, Percentage 2.14e+01%, Percentage 3.33e+01%, Size 1.50e+02m
DOI: 10.6041/j.issn.1000-1298.2018.03.018
Compendex references: YES
Database: Compendex
8. Investigation on Complex Spatial Ecological Network Structure Based on Complex Network Analysis Method
Accession number: 20182605370890
Authors: Yu, Qiang (1); Yang, Lan (1); Yue, Depeng (1); Wang, Yuhang (1); Su, Kai (1); Zhang, Qibin (1)
Author affiliation: (1) Beijing Key Laboratory of Precision Forestry, Beijing Forestry University, Beijing; 100083, China
Corresponding author: Yue, Depeng(yuedepeng@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 214-224
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The study on the structure of complex space ecological network with spatial attribute information is a blank of the current research on complex network. Dengkou County, a typical county in the desert oasis area, was selected as the study area. The method of point pattern analysis in complex network analysis methods, the algorithm of extracting network skeletons and the robustness index of spatial structure were modified in accordance with the characteristics of the actual spatial ecological network, to analyze the structure of spatial complex ecological network in the study area. The results showed that the nodes of seven types of eco-sources exhibited aggregated spatial distribution pattern at a small scale, which was gradually distributed randomly as the scale increase, and finally distributed uniformly. This distribution feature ensured that ecological networks were stable at both small and large scales. The NDVI and MNDWI values of different types of ecological source had different distribution characteristics. The density of water corridors was ranged from 0 to 1.46, and the density of road corridors was ranged from 0 to 2.27. The framework corridor identified by Kruskal algorithm combined with the ecological network features was in accordance with the actual situation. The initial robustness of the current ecological network was only 0.73, and the robustness of the ecological network after optimization reached 1. Malicious attacks were more destructive than random attacks, but the optimized ecological networks showed stronger anti-strike capability, stronger connectivity and stronger robustness of node and edge recovery. After optimization of the ecological node layout, the ecological network nodes and edges were more resistant to attack and destruction and more resilient. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Complex networks
Controlled terms: Ecology? - ?Musculoskeletal system
Uncontrolled terms: Dengkou counties? - ?Ecological networks? - ?Point patterns? - ?Skeleton corridor? - ?Structural robustness
Classification code: 454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?461.3 Biomechanics, Bionics and Biomimetics
Biomechanics, Bionics and Biomimetics
? - ?722 Computer Systems and Equipment
Computer Systems and Equipment
DOI: 10.6041/j.issn.1000-1298.2018.03.026
Compendex references: YES
Database: Compendex
9. Accurate Measurement of Single Grain Volume Draining Method
Accession number: 20182605370868
Authors: Liu, Shuangxi (1, 2); Sun, Linlin (1); Fu, Qianyue (1); Wang, Zhen (1); Zhang, Chunqing (3); Wang, Jinxing (1, 2)
Author affiliation: (1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai’an; 271018, China; (2) Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments, Tai’an; 271018, China; (3) College of Agriculture, Shandong Agricultural University, Tai’an; 271018, China
Corresponding author: Wang, Jinxing(jinxingw@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 36-42
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to solve the problems of complex operation, heavy workload and toxic when measuring the grain volume by the existing pycnometer method, the research on accurate measurement of single grain volume draining method was carried out. Combining the image processing technology and the volumetric principle of the liquid draining method, the device was mainly composed of a standard white light source, a linear CCD, a measuring container, a cereal dedicated holding device, a computer and the like. Firstly, the standard white light source was adjusted, the image acquisition environment was enhanced, volume calibration was performed, and the actual volume value V0was calculated, which was about 0.002 3 mL represented by a single pixel. Secondly, the liquid level image of measuring vessel was aquired by high accuracy linear CCD camera. Finally, the difference method was used to extract the image of the liquid level change; the number of pixels contained in this part of the image was counted, combining with the volume calibration results to calculate the volume value. Volume draining method and pycnometer method were used for the same batch of cereals respectively. Two sets of volume data were then obtained. Volumetric discharge took 12 min, and pycnometer method took 124 min. The two groups of data were tested by using the Grubbs test, F test and t test for significant differences tests, and the calculated test values were (TA, TB), FAB, tAB. The values were compared with the critical value of their distribution table: (TA, TB)0.05, 100, FAB0.025(99, 99), tAB0.05, 198, and all of which met the inspection requirements. The results showed that there was no significant difference between the two sets of volume data. The accurate measuring device and method of volumetric discharge of single grain can quickly and precisely measure the volume of irregular single grain, and provide reliable grain volume for scientific research and actual production data. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Image enhancement
Controlled terms: Calibration? - ?CCD cameras? - ?Light sources? - ?Liquids? - ?Pixels? - ?Testing
Uncontrolled terms: Accurate measurement? - ?Image processing technology? - ?Linear CCD? - ?Liquid level change? - ?Scientific researches? - ?Single grains? - ?Volume draining method? - ?White light sources
Classification code: 714.2 Semiconductor Devices and Integrated Circuits
Semiconductor Devices and Integrated Circuits
Numerical data indexing: Time 7.20e+02s, Time 7.44e+03s
DOI: 10.6041/j.issn.1000-1298.2018.03.004
Compendex references: YES
Database: Compendex
10. Effects of Soil Water, Plant, Water Saving and Yield Increasing of Maize under Regulated Deficit Drip Irrigation
Accession number: 20182605370894
Authors: Wei, Yongxia (1, 2); Ma, Yingying (1); Liu, Hui (3); Zhang, Yufeng (1); Yang, Junming (1); Zhang, Yi (1)
Author affiliation: (1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Key Laboratory of High Efficiency Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China; (3) College of Science, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Liu, Hui(xiaolaida@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 252-260
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Regulated deficit irrigation is through active exerting a certain degree of water stress artificially, exercising the crop drought resistance, affecting their physiological and biochemical process, in order to achieve the goal of saving water and increasing production. Taking maize as research object, the experiment was carried out in micro test pit area, and the influences on soil water distribution, root length, root length, root number, yield and crop water utilization efficiency were studied under drip irrigation on ground. Five different treatments (C1, C2, C3, C4 and C5) were set, which were slight and moderate regulated deficit in seeding and jointing stage, separately, and moderate regulated deficit in seeding stage while slight regulated deficit in jointing stage in 2016, and the whole growth period with suitable irrigation (CK) was set as control treatment. The result showed that the final water content of filtration cake in the crown of the maize was increased by-6.03% ~ 4.61% and 1.30%~8.15% in the root. At the same time, the yield of C1, C4 and C5 was decreased by 7.89%, 23.47% and 28.13%, respectively, while that of C2 and C3 was increased by 5.20% and 1.49%, respectively, water use efficiency was improved by 0.33%, 26.25%, 18.27%, 6.64% and 16.94%, respectively, and five treatments saved 8.26%, 16.71%, 14.07%, 28.35% and 38.54% of water, respectively. The moderate treatment in seeding stage and the mild treatment in jointing stage were the appropriate water deficit treatments for maize under drip irrigation in water saving and production increasing. The result was of practical significance to guide the establishment of reasonable irrigation system for maize in western area of Heilongjiang Province. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 25
Main heading: Water filtration
Controlled terms: Crops? - ?Efficiency? - ?Irrigation? - ?Plants (botany)? - ?Soil moisture? - ?Water conservation? - ?Water resources? - ?Water supply systems
Uncontrolled terms: Drip irrigation? - ?Maize? - ?Regulated deficit irrigation? - ?Root parameters? - ?Yield
Classification code: 444 Water Resources
Water Resources
? - ?445.1 Water Treatment Techniques
Water Treatment Techniques
? - ?446.1 Water Supply Systems
Water Supply Systems
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?821.4 Agricultural Products
Agricultural Products
? - ?913.1 Production Engineering
Production Engineering
Numerical data indexing: Percentage 1.41e+01%, Percentage 1.49e+00%, Percentage 1.67e+01%, Percentage 1.69e+01%, Percentage 1.83e+01%, Percentage 2.35e+01%, Percentage 2.62e+01%, Percentage 2.81e+01%, Percentage 2.84e+01%, Percentage 3.30e-01%, Percentage 3.85e+01%, Percentage 4.61e+00%, Percentage 5.20e+00%, Percentage 6.64e+00%, Percentage 7.89e+00%, Percentage 8.26e+00%
DOI: 10.6041/j.issn.1000-1298.2018.03.030
Compendex references: YES
Database: Compendex
11. Numerical Simulation of Water and Sediment Movement in Screen Filter Based on Coupled CFD-DEM
Accession number: 20182605370900
Authors: Yu, Liming (1); Xu, Zhou (1); Yang, Jurui (1); Fan, Wenbo (2); Li, Na (1); Long, Jun (3)
Author affiliation: (1) Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming; 650500, China; (2) College of Water and Architectural Engineering, Shihezi University, Shihezi; 832003, China; (3) School of Hydraulic Engineering, Changsha University of Science and Technology, Changsha; 410114, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 303-308
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Water and sediment movement in filter is complex and changeable. In the beginning, local blockage on filter element caused by non-uniform distribution of sediment affects flow distribution which will change tracks of follow-up sediment. Using CFD-DEM(computational fluid dynamics, CFD; discrete element method, DEM) method to simulate flow field and sediment distribution in Y-type screen filter, the resistance characteristics of filter and its influence on the movement and distribution of sediment were directly reflected. Results showed that the obvious backflow, vortex and viscous flow in the whole flow field led the uneven flow rate which was higher in outlet area and lower in inlet area, with a difference of 39%. Filter element was responsible for 90% of the total pressure loss. Flow condition was changed significantly with time, while sediment deposition appeared in the order of outlet under area, outlet upper area, inlet under area, inlet upper area and finally blocked the whole filter element. Among the four face areas in the filter element, sediment deposition was the least in outlet upper area which was at high flow rate while most in inlet upper area which was at low flow rate. So appropriately raising the flow section of outlet upper area with a better performance can improve the filtration efficiency. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 14
Main heading: Computational fluid dynamics
Controlled terms: Bandpass filters? - ?Computer simulation? - ?Deposition? - ?Flow fields? - ?Numerical models? - ?Sediments
Uncontrolled terms: CFD-DEM? - ?Filtration efficiency? - ?Non-uniform distribution? - ?Resistance characteristics? - ?Screen filters? - ?Sediment deposition? - ?Sediment distribution? - ?Total-pressure loss
Classification code: 483 Soil Mechanics and Foundations
Soil Mechanics and Foundations
? - ?631.1 Fluid Flow, General
Fluid Flow, General
? - ?703.2 Electric Filters
Electric Filters
? - ?723.5 Computer Applications
Computer Applications
? - ?802.3 Chemical Operations
Chemical Operations
? - ?921 Mathematics
Mathematics
Numerical data indexing: Percentage 3.90e+01%, Percentage 9.00e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.036
Compendex references: YES
Database: Compendex
12. Effect of Biochar on Root Morphology and Endophytic Fungal Diversity of Winter Wheat in North China
Accession number: 20182605370892
Authors: Li, Ruixia (1, 2); Li, Hongjie (3); Huo, Yanli (4); Gao, Yue (1); Yang, Zhengli (1); Zhang, Aiping (1)
Author affiliation: (1) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (2) College of Tourism, Hebei University of Economics and Business, Shijiazhuang; 050061, China; (3) Dezhou Academy of Agricultural Sciences in Shandong Province, Dezhou; 253015, China; (4) College of Basic Medical, Hebei North University, Zhangjiakou; 075000, China
Corresponding author: Yang, Zhengli(13811869923@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 235-242
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The winter wheat was selected to study the effect of biochar of cotton straw on root morphology and endophytic fungal communities by using the method of root scanning and Illumina Miseq high-throughput sequencing. The symbiosis mechanism was found by the test. The treatments were amount of 4.5 t/hm2, 9.0 t/hm2and 13.5 t/hm2of straw biochar, respectively applied to the soil, and the straw returning was taken as test control in the field experiment. The results showed that root diameter and specific root length were increased significantly, and branching density and biomass were decreased significantly in the primary root, and only the root branching density was decreased in the secondary root, when the amount of biochar was 4.5~13.5 t/hm2in the mature period of winter wheat. At the fungal phyla level, the abundance of Ascomycota was increased significantly, and the abundances of Zygomycota, Chytridiomycota and unidentified fungus was reduced greatly, and the abundance of Glomeromycota was not significant. At the common fungal order level, the abundance of Pleosporales was increased significantly, and the abundance of Eurotiales and Mortierellales was reduced greatly. With the amount of 4.5~9.0 t/hm2biochar promoted the primary root growth of root branch density and biomass by decreasing the abundance of Eurotiales, and inhibited the secondary root growth of diameter and branch density by increasing the abundance of Pleosporales. By comprehensive comparison, the effect of amount of 9.0 t/hm2biochar on root morphology was better than that of other treatments. The treatment with amount of 9.0 t/hm2significantly increased the primary root diameter by 5.00% and specific root length by 33.57%, and decreased root branch density by 67.26% and biomass by 27.27%, while also reduced the secondary root diameter by 13.16% and branch density by 34.38%, compared with the test control at maturity stage of winter wheat. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 31
Main heading: Fungi
Controlled terms: Biomass? - ?Crops? - ?Ecology? - ?Morphology
Uncontrolled terms: Bio chars? - ?Diversity? - ?Endophytic fungi? - ?Primary roots? - ?Secondary root? - ?Winter wheat
Classification code: 454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?821.4 Agricultural Products
Agricultural Products
? - ?951 Materials Science
Materials Science
Numerical data indexing: Percentage 1.32e+01%, Percentage 2.73e+01%, Percentage 3.36e+01%, Percentage 3.44e+01%, Percentage 5.00e+00%, Percentage 6.73e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.028
Compendex references: YES
Database: Compendex
13. Design and Experiment of Variable-rate Fertilizer Spreader with Centrifugal Distribution Cover for Rice Paddy Surface Fertilization
Accession number: 20182605370874
Authors: Shi, Yinyan (1); Chen, Man (2); Wang, Xiaochan (1, 3); Morice, O.O. (1); Li, Chengguang (1); Ding, Weimin (1, 3)
Author affiliation: (1) College of Engineering, Nanjing Agricultural University, Nanjing; 210031, China; (2) Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing; 210014, China; (3) Engineering Laboratory of Modern Facility Agriculture Technology and Equipment in Jiangsu Province, Nanjing; 210031, China
Corresponding author: Wang, Xiaochan(wangxiaochan@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 86-93 and 113
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: As the requirement advances for improving the working efficiency of mechanized application and the utilization rate of fertilizer, a variable-rate fertilizer spreader with centrifugal distribution cover for rice paddy surface fertilization based on the spectral sensor (Green Seeker?) was developed to implement regional real-time variable-rate fertilization during rice growth period combining with the agronomic characteristics of rice fertilizer and near-earth spectroscopy. Spectrum detection device, decision-making and control system, variable-rate actuator and some other key techniques were designed, feedback system based on core controller STM32F103 was set up, and target application rate was responded united with expert fertilization strategy. Three-factor and three-level orthogonal performance test was carried out with setting feed gate flow rate A, disc rotational speed B and machine ground speed C as the influence factors, particle distribution coefficient of variation Cvand relative error of application rate γ as the evaluation index. By the orthogonal test, it can be known that the importance order of the factors which affected the Cvwas A, B and C, and that affected the γ was B, A and C in the target spreading swath width, the comprehensive choice optimum combination of working parameters was A2B2C2, with q=300 g/s, n=600 r/min, v1=1.2 m/s, and Cv=13.82%, and γ=9.54%, the fertilizer spreader reached the best working performance. Field tests under optimum combination showed that the average error of Cvand γ was 9.19% and 9.25%, respectively, compared with performance test. The performance of the developed variable-rate fertilizer spreader with centrifugal distribution cover was perfect and satisfied the requirement of uniformity of fertilizer and accuracy of application, which improved the performance of the centrifugal variable-rate fertilizer applicator, and it can provide certain theoretical basis for the traditional empirical fertilization. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Fertilizers
Controlled terms: Centrifugation? - ?Decision making? - ?Spreaders
Uncontrolled terms: Centrifugal type? - ?Double-disc? - ?Spectral detection? - ?Spreading performance? - ?Variable rate fertilization
Classification code: 802.3 Chemical Operations
Chemical Operations
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?912.2 Management
Management
Numerical data indexing: Percentage 9.19e+00%, Percentage 9.25e+00%
DOI: 10.6041/j.issn.1000-1298.2018.03.010
Compendex references: YES
Database: Compendex
14. Design and Experiment of Wheat Pneumatic Centralized Seeding Distributing System
Accession number: 20182605370871
Authors: Zhang, Xiaohui (1, 2); Wang, Yongzhen (1, 2); Zhang, Li (1, 2); Peng, Chuanjie (1, 2); Fan, Guiju (1, 2)
Author affiliation: (1) College of Mechanical and Electrical Engineering, Shandong Agricultural University, Tai’an; 271018, China; (2) Shandong Provincial Key Laboratory of Horticultural Machinery and Equipment, Tai’an; 271018, China
Corresponding author: Fan, Guiju(fanguiju2002@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 59-67
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aimed at the problem of low breadth and uneven wheat sowing machine, a kind of wheat pneumatic centralized sowing system was designed. The sowing mechanism and distribution mechanism were studied from the aspects of concentrated quantitative seeding system and airflow first-order distribution system. The stability of the centralized quantitative seeding system and the uniformity of the seed distribution system were analyzed. Concentrated quantitative seeding system discharged a certain amount of seeds, and the seeds fell into the conveying tube in gravity. Airflow first-order distribution system converted the seeds into a uniform seed stream and transported to the seeding tube, which achieved uniform seeding requirements. According to the principle of distributor, the diameter of the conveying tube was 50 mm. By the computational fluid dynamics (CFD) software Solidworks Flow, the influence of structural parameters of seed distribution system on vacuum chamber fluid were simulated and analyzed. The structural parameters included the conveying pipe and outer cover. The analysis of speed flow field showed that corrugated length of the fold tube was 16 mm, corrugated angle of the fold tube was 90°, and cone angle of outer cover was 120°. The experiments of the uniformity and steadiness was designed and conducted for seeding distribution system. The performance tests were performed with four indices adopted, including variation coefficient of total displacement stability, variation coefficient of each row displacement consistency, seeding rate coefficient of variation of distributor intra-row, and the percentage of damaged seeds in laboratory. The results showed that when rotate speed of sowing device was in the range of 20~40 r/min, variation coefficient of total displacement stability was 1.01%~1.19%, variation coefficient of each row displacement consistency was 3.20%, seeding rate coefficient of variation of distributor intra-row was 3.96%, and the percentage of damaged seeds was 0.23%. The test results were consistent with CFD simulation. The field experiment of sowing was also carried out with four indices, including the percentage of damaged seeds, variation coefficient of total displacement stability, variation coefficient of each row displacement consistency, and variation coefficient of seeding uniformity for this device. The results showed that variation coefficient of total displacement stability was 1.06%, variation coefficient of each row displacement consistency was 3.34%, variation coefficient of seeding uniformity was 27.35%, the percentage of damaged seeds was 0.28%, and the seeding emergence rate was 89.63%. These testing results fully coincided with the standard GB/T 9478-2005 Test methods of grain drills. The design and experimentation improved the seeding stability and distribution uniformity of the planter, and the results provided a theoretical reference for the design and analysis of wheat wide precision sowing. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 28
Main heading: Seed
Controlled terms: Computational fluid dynamics? - ?Pneumatics? - ?Stability? - ?Testing? - ?Tubes (components)? - ?Two phase flow
Uncontrolled terms: Displacement consistency? - ?Displacement stability? - ?Distribution mechanism? - ?Distribution uniformity? - ?Distributor? - ?Structural parameter? - ?Variation coefficient? - ?Wheat
Classification code: 619.1 Pipe, Piping and Pipelines
Pipe, Piping and Pipelines
? - ?631.1 Fluid Flow, General
Fluid Flow, General
? - ?632.3 Pneumatics
Pneumatics
? - ?723.5 Computer Applications
Computer Applications
? - ?821.4 Agricultural Products
Agricultural Products
Numerical data indexing: Percentage 1.06e+00%, Percentage 2.30e-01%, Percentage 2.74e+01%, Percentage 2.80e-01%, Percentage 3.20e+00%, Percentage 3.34e+00%, Percentage 3.96e+00%, Percentage 8.96e+01%, Rotational_Speed 2.00e+01RPM to 4.00e+01RPM, Size 1.60e-02m, Size 5.00e-02m
DOI: 10.6041/j.issn.1000-1298.2018.03.007
Compendex references: YES
Database: Compendex
15. Optimization of Process Conditions of γ-Amino Butyric Acid-enriched Fermented Milk with Sprouted Soybeans
Accession number: 20182605370911
Authors: Zhang, Jinlan (1, 2); Dai, Tiantian (2); Wang, Danting (1, 2); Li, Pinglan (1, 2)
Author affiliation: (1) The Innovation Centre of Food Nutrition and Human Health, China Agricultural University, Beijing; 100083, China; (2) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing; 100083, China
Corresponding author: Li, Pinglan(lipinglan@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 373-380
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The concentration of bioactive components was the key factor to functionality of fermented food. The object was to develop and characterize a sprouted soybeans-based fermented milk by using γ-amino butyric acid (GABA)-producing Lactobacillus plantarum S-35. Inoculation volume, fermentation time and fermentation temperature were studied as single factors affecting the yields of GABA in the fermented milk. The central composite design was used to optimize the fermentation technology. The results were analyzed with the software Design-Expert 8.0.6. Results indicated that the fermentation system model had an extremely significant effect on predicting the results of the test. Results of the response surface optimization test showed that the optimal fermentation condition was as follows: inoculation volume was 3.5%, fermentation time was 27 h, and fermentation temperature was 34.5. The verification tests demonstrated that the actual yields of GABA was 1.61 g/L, and the maximum number of viable probiotics count was 1.60×109CFU/mL. When it was stored at 4 after 7 d, the product had good quality with sensory evaluation, viable cell numbers and pH value. The research results proposed specific processes and fermentation conditions for GABA enrichment in sprouted soybeans, which can provide a new, natural, and functional food resource. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Butyric acid
Controlled terms: Fermentation? - ?Fermented milk? - ?Functional food? - ?Optimization? - ?Software design? - ?Surface properties
Uncontrolled terms: Central composite designs? - ?Fermentation conditions? - ?Fermentation technologies? - ?Fermentation temperature? - ?Lactobacillus plantarum? - ?Response surface method? - ?Response surface optimization? - ?Sprouted soybeans
Classification code: 723.1 Computer Programming
Computer Programming
? - ?804.1 Organic Compounds
Organic Compounds
? - ?822.3 Food Products
Food Products
? - ?921.5 Optimization Techniques
Optimization Techniques
? - ?951 Materials Science
Materials Science
Numerical data indexing: Mass_Density 1.61e+00kg/m3, Percentage 3.50e+00%, Time 9.72e+04s
DOI: 10.6041/j.issn.1000-1298.2018.03.047
Compendex references: YES
Database: Compendex
16. Spatial Interpolation of Soil Mechanical Composition Based on Spherical Coordinate Transform Method
Accession number: 20182605370899
Authors: Li, Zhen (1); Zhang, Shiwen (2); Cao, Meng (1); Huang, Yajie (1); Wei, Xing (1); Huang, Yuanfang (1)
Author affiliation: (1) College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China; (2) School of Earth and Environment, Anhui University of Science and Technology, Huainan; 232001, China
Corresponding author: Huang, Yuanfang(yfhuang@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 295-302
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: As a kind of compositional data, the spatial interpolation of soil mechanical composition needs to meet four constraints of constant sum, nonnegativity, linear unbiased estimation and error minimization. Therefore, it usually needs to be transformed before spatial interpolation. A novel transformation method-spherical coordinate transform method was proposed and the study area was located in Yinbei Irrigation District, Ningxia Hui Autonomous Region. Firstly, the sampled soil mechanical composition data was transformed through three methods, including symmetry logratio transform method, asymmetry logratio transform method and the proposed spherical coordinate transform method, respectively. Then the soil mechanical composition spatial interpolation was realized with the application of ordinary Kriging. Secondly, the soil mechanical composition interpolation maps of different transform methods were compared to analyze the scientificity and feasibility of the proposed transform approach. The precision and fitting effect were assessed by utilizing the mean absolute error (MAE), root mean square error (RMSE), index of agreement (d) and Pearson’s correlation (R). The results indicated that spherical coordinate transform technology not only can satisfy the four constraint conditions but also had superior interpolation accuracy for sand and silt content than the other two logratio transform methods. However, the logratio transform methods had more accurate interpolation results than spherical coordinate transform method for clay content prediction. To summarize, a novel transform technology with the advantages of easy understanding, small calculation amount, and good interpolation precision and without consideration of zero values for spatial interpolation of soil mechanical composition was presented. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 30
Main heading: Interpolation
Controlled terms: Correlation methods? - ?Errors? - ?Mean square error? - ?Soils? - ?Spheres
Uncontrolled terms: Constraint conditions? - ?Interpolation precision? - ?Irrigation districts? - ?Mechanical compositions? - ?Root mean square errors? - ?Spatial interpolation? - ?Spherical coordinates? - ?Transformation methods
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922.2 Mathematical Statistics
Mathematical Statistics
DOI: 10.6041/j.issn.1000-1298.2018.03.035
Compendex references: YES
Database: Compendex
17. Recognition of Pig Cough Sound Based on Deep Belief Nets
Accession number: 20182605370886
Authors: Li, Xuan (1, 2); Zhao, Jian (1, 2); Gao, Yun (1, 2); Lei, Minggang (2, 3); Liu, Wanghong (2, 3); Gong, Yongjie (1, 2)
Author affiliation: (1) College of Engineering, Huazhong Agricultural University, Wuhan; 430070, China; (2) The Cooperative Innovation Center for Sustainable Pig Production, Wuhan; 430070, China; (3) College of Animal Science and Technology, College of Animal Medicine, Huazhong Agricultural University, Wuhan; 430070, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 179-186
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In the early stage, pig cough sound could be detected for early disease warning, and a method based on deep belief nets (DBN) was proposed to construct a pig cough sound recognition model. Pig sounds of Landrace pigs, including cough, sneeze, eating, scream, hum and shaking ears sounds were automatically recorded. The samples were preprocessed by speech enhancement algorithm based on a psychoacoustical model and speech endpoint detection algorithm based on short-time energy to reduce the noise and get useful parts of samples. Based on the dynamic time warping (DTW) algorithm, the short-time energy characteristics were scaled to a 300-dimensional short-time energy feature vector, while the 24-dimensional MFCC characteristics were scaled to a 720-dimensional MFCC feature vector. And then the 300-dimensional short-time energy feature vector and the 720-dimensional MFCC feature vector were combined to construct a 1020-dimensional vector as the input of the deep belief nets. The number of neuron of the three hidden layers were set to be 42, 17 and 7, respectively, so the pig sound recognition model based on DBN was finally designed to be 1020-42-17-7-2. The 5-fold cross validation experiment showed that recognition rate, error recognition rate and total recognition rate of the best experimental group were 94.12%, 7.45% and 93.21%, respectively. Furthermore, the first 479 principal components of 1020 dimension feature parameters were obtained by PCA dimensionality reduction. The recognition rate, error recognition rate and total recognition rate obtained better performance, and the best experimental group reached 95.80%, 6.83% and 94.29%, respectively. The result demonstrated that the DBN model was effective for the pig cough recognition. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 26
Main heading: Mammals
Controlled terms: Speech enhancement? - ?Temperature measurement? - ?Vectors
Uncontrolled terms: Cough? - ?Deep belief nets? - ?Dimensionality reduction? - ?Dynamic time warping algorithms? - ?Feature parameters? - ?Recognition? - ?Speech endpoint detection? - ?Speech enhancement algorithm
Classification code: 751.5 Speech
Speech
? - ?921.1 Algebra
Algebra
? - ?944.6 Temperature Measurements
Temperature Measurements
Numerical data indexing: Percentage 6.83e+00%, Percentage 7.45e+00%, Percentage 9.32e+01%, Percentage 9.41e+01%, Percentage 9.43e+01%, Percentage 9.58e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.022
Compendex references: YES
Database: Compendex
18. Design and Experiment of Sprocket Conveying Residual Film Recycling Machine of Casting Film
Accession number: 20182605370878
Authors: Wang, Xufeng (1, 2); Hu, Can (2); Lu, Bing (1); Yi, Xiaokang (2); Hou, Shulin (1, 2)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) College of Mechanical and Electrical Engineering, Tarim University, Alar; 843300, China
Corresponding author: Hou, Shulin(slhou@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 122-129
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The problem of residual film pollution is serious in the cotton fields of Xinjiang, and the mechanical recycling of residual film is the main recycling method. In the existing residual film recycling machines, spring tine or telescopic rod tine film producing device are commonly used, thus the phenomenon that residual film winds work piece is prone to occur, affecting the effect of film producing and removal. In view of the above problems, a sprocket conveying residual film recycling machine of casting film with film producing throwing, sprocket conveying and automatic film stripping was designed according to the advantages of the existing models based on the principles of planer cylinder knife film producing and casting film cylinder knife throwing. The machine was mainly composed of film-producing device, conveying device, film stripping device, transmission system and film collecting box. The residual film by throwing up film with chain gear conveying realized the separation of residual film and film clod, ensured the reliability of automatic stripping, and the scraper stripping mechanism to complete unloading film, plastic film, solved the difficult problem of removing film winding. The results of the field experiment showed that when the operating speed was 4~7 km/h, the average value of the recycling rate of residual film was 90.6%, the average value of working efficiency of the machine was 0.84 hm2/h, and the average value of impurity rate of residual film was 3.971%. When the operating speed was fast, the working efficiency was improved, but the recycling rate was reduced, and the impurity rate was increased. When the operating speed was 5 km/h, the average value of the recycling rate was 91.8%, the working efficiency was 0.733 hm2/h, and the average value of impurity rate was 2.605%, so it was more suitable operation speed. The machine was operated well, which had good effects of film producing and stripping, and it can be used for the recycling of residual film in the cotton fields of Xinjiang, it can also provide design reference for residual film recycling machine. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Recycling
Controlled terms: Cotton? - ?Cylinders (shapes)? - ?Efficiency? - ?Sprockets? - ?Unloading? - ?Wheels
Uncontrolled terms: Cotton fields? - ?Field experiment? - ?Mechanical recycling? - ?Recycling methods? - ?Residual films? - ?Stripping mechanisms? - ?Transmission systems? - ?Working efficiency
Classification code: 452.3 Industrial Wastes
Industrial Wastes
? - ?601.2 Machine Components
Machine Components
? - ?691.2 Materials Handling Methods
Materials Handling Methods
? - ?821.4 Agricultural Products
Agricultural Products
? - ?913.1 Production Engineering
Production Engineering
Numerical data indexing: Percentage 2.60e+00%, Percentage 3.97e+00%, Percentage 9.06e+01%, Percentage 9.18e+01%, Velocity 1.11e+00m/s to 1.94e+00m/s, Velocity 1.39e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.03.014
Compendex references: YES
Database: Compendex
19. Parameters Optimization for Gripping and Delivering Device of Corn Harvester for Reaping both Corn Stalk and Spike
Accession number: 20182605370877
Authors: Zhang, Zongling (1); Han, Zengde (2); Liu, Lijing (3); Li, Xiaodong (3); Hao, Fuping (3); Dong, Zhe (4)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China; (3) Modern Agricultural Equipment Co., Ltd., Beijing; 100083, China; (4) Beijing Beiqi Mould & Plastic Technology Co., Ltd., Beijing; 102600, China
Corresponding author: Liu, Lijing(xyliulj@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 114-121
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to study the influence discipline of parameters of gripping and delivering device (GDD) for corn harvester for reaping both corn stalk and spike in the cramping-cutting-transporting type on corn harvesting performance, the working principle of GDD was analyzed. Box-Benhnken design (BBD) response surface method was used to design the field experiments. An orthogonal rotary combination experiment was conducted with the angle of gripping chain, the teeth number of sprockets in enter shaft, the horizontal distances between reciprocating cutter and the nip point of gripping chains and the working speed of corn harvester as four independent factors, as well as loss rate of corncobs, maximum offset of x axis and y axis as three dependent indices, while using Zhengdan corn as the test materials. The height of 1.2 m in corn straw was signed by colorful paper tape. And high speed cameras were utilized to record the motion of mark point. ProAnalyst motion analysis software was applied to get the maximum offset of x axis and y axis. Design-Expert software was employed to analyze the test results, mathematical equations between independent and dependent factors were gained. The results indicated that four independent variables had a second nonlinear relationship with loss rate of corncobs and maximum offset of x axis, and the horizontal distance between reciprocating cutter and the nip point of gripping chains had the greatest influence as well as the angle of gripping chain had the least effect, respectively. The four factors had no significant difference in maximum offset of y axis. The interaction of factors only had significant effect on loss rate of corncobs. At the angle of gripping chain of 19.96°, the teeth number of sprockets in enter shaft of 22.09, the horizontal distances of 22.33 mm as well as the working speed of corn harvester of 1.31 m/s, the GDD showed optimal performance with loss rate of 0.4% and maximum offset of x axis of 24 mm. Field verification test was carried out after the combination of the optimal parameters, and the results showed that the regression model had good reliability to predict the loss rate of corncobs and maximum offset of x axis. According to comparison of transplanting performance before and after parameter optimization, loss rate of corncobs was reduced by 2.4 percentage points, which was superior to the technique indexes of national and industry standards as well. The research provided a basis on the design of gripping and delivering device of corn harvester for reaping both corn stalk and spike. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Harvesters
Controlled terms: Chains? - ?High speed cameras? - ?Regression analysis? - ?Software testing? - ?Sprockets? - ?Wheels
Uncontrolled terms: Corn harvesters? - ?Field test? - ?Gripping and delivering device? - ?Parameter optimization? - ?Reaping stalk and spike
Classification code: 601.2 Machine Components
Machine Components
? - ?602.1 Mechanical Drives
Mechanical Drives
? - ?723.5 Computer Applications
Computer Applications
? - ?742.2 Photographic Equipment
Photographic Equipment
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?922.2 Mathematical Statistics
Mathematical Statistics
Numerical data indexing: Percentage 4.00e-01%, Size 1.20e+00m, Size 2.23e-02m, Size 2.40e-02m, Velocity 1.31e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.03.013
Compendex references: YES
Database: Compendex
20. Bionic Design and Performance Analysis of Adaptive Low Vibration Walking Wheel
Accession number: 20182605370823
Authors: He, Yanhu (1); Han, Dianlei (2); Li, Guoyu (2); Luo, Gang (2); Zhang, Rui (2)
Author affiliation: (1) School of Mechanical and Electrical Engineering, Huzhou Vocational and Technical College, Huzhou; 313000, China; (2) Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun; 130022, China
Corresponding author: Zhang, Rui(zhangrui@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 418-426
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Based on ostrich foot locomotion posture, energy storage and vibration reduction mechanism of the metatarsophalangeal joint (MTP), a bionic adaptive low vibration walking wheel was designed to improve the low vibration performance. Through the finite element method (FEM), motion process of the walking wheel was analyzed on the soft/hard ground. The result showed that under the condition of 30 N load and 10(°)/s, the fluctuation range of the bionic walking wheel center was reduced by 85.71% and 93.33% on the soft and hard ground, respectively. In order to further verify the vibration reduction performance of the bionic walking wheel, the light load of lunar soil/wheel interaction test system was employed for test. When the slip ratio was smaller than 40%, the drawbar pulling force of the bionic walking wheel was all larger than the traditional walking wheel. When the slip ratio was larger than 40% and the speed was 20(°)/s, the drawbar pulling force of the bionic walking wheel was less than the traditional walking wheel. The results showed that the bionic walking wheel was provided with better traction and passing-through performances on the soft ground. Under the condition of 30(°)/s, the accelerations were reduced by 6.3% and 15.8% on the soft and hard ground, respectively. Meanwhile, the amplitudes were reduced by 14.6% and 9.6%, respectively. On the premise that passing-through performances of the bionic wheel was assured, combining the simulation and test data on the soft and hard ground, the wheel center fluctuation of the bionic walking wheel was smaller than that of the traditional walking wheel. Therefore, the vibration of the walking wheel, caused by polygon effect, was solved effectively. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 29
Main heading: Vibration analysis
Controlled terms: Bionics? - ?Birds? - ?Digital storage? - ?Wheels
Uncontrolled terms: Bionic design? - ?Low vibration? - ?Metatarsophalangeal joints? - ?Ostrich foot? - ?Performance analysis? - ?Polygon effects? - ?Soft/hard ground? - ?Vibration reductions
Classification code: 461.1 Biomedical Engineering
Biomedical Engineering
? - ?601.2 Machine Components
Machine Components
? - ?722.1 Data Storage, Equipment and Techniques
Data Storage, Equipment and Techniques
Numerical data indexing: Force 3.00e+01N, Percentage 1.46e+01%, Percentage 1.58e+01%, Percentage 4.00e+01%, Percentage 6.30e+00%, Percentage 8.57e+01%, Percentage 9.33e+01%, Percentage 9.60e+00%
DOI: 10.6041/j.issn.1000-1298.2018.03.053
Compendex references: YES
Database: Compendex
21. Multi-characteristic Comprehensive Recognition of Well-facilitied Farmland Based on TOPSIS and BP Neural Network
Accession number: 20182605370888
Authors: Lü, Yahui (1); Yun, Wenju (2); Zhang, Chao (1, 2); Zhu, Dehai (1, 2); Yang, Jianyu (1, 2); Chen, Yingyi (1)
Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory for Agricultural Land Quality Monitoring and Control, Ministry of Land and Resources, Beijing; 100035, China
Corresponding author: Zhang, Chao(zhangchaobj@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 196-204
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: China puts forward the major strategic deployment of constructing well-facilitied farmland vigorously to improve the overall production capacity of farmland and adapt to the development of agricultural modernization. The recognition of well-facilitied farmland is foundation of site selection before constructing and evaluation after constructing. The well-facilitied farmland was understood from the point of view of production demand and recognized based on the evaluation of farmland comprehensive quality. Firstly, the characteristics of farmland comprehensive quality was analyzed from a lot of angles, such as background condition, spatial shape, construction level, ecological protection and so on, by fusing the multi-source data and taking the farmland patches as the basic units. The description system of farmland comprehensive quality was built by using five characteristics, including soil productivity, land contiguous, field shape, road accessibility and ecological protection. Secondly, it assumed that these five characteristics were the same important for farmland comprehensive quality, so the weights were all made as 0.20 and the preliminary evaluation results were got by TOPSIS method. Thirdly, the true-value samples were acquired by using the combined method of preliminary evaluation results and man-machine interactive optimization. The man-machine interactive optimization was achieved by spatial overlay between the preliminary evaluation results and the farmland utilization grade from the farmland-grading work in China. And then BP neural network was used to fix the feature weights. Fourthly, the final accurate comprehensive quality evaluation results were got and the recognition of the well-facilitied farmland was achieved. Finally, Daan City in Jilin Province was taken as the study area. The research results showed that the accuracy of the method to evaluate farmland comprehensive quality was above 96%, basing on the multi-characteristic description system. The well-facilitied farmland was widely distributed in the study area. The well-facilitied farmland mainly concentrated in northeast, north, edge of northwest and part of the southern region. These regions had the advantage of agricultural modernization, such as concentrated farmland, villages, roads and forest. The well-facilitied farmland which was registered with the law and the prospective high-quality farmland which was not registered with the law were both recognized effectively. The above result had strong consistency on the spatial distribution with the preliminary evaluation results, but the former refined the comprehensive quality results of partial farmland based on the relative importance of each characteristic. The research result can provide scientific reference and technical support for regulation, protection and construction of well-facilitied farmland. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Farms
Controlled terms: Agricultural machinery? - ?Ecology? - ?Grading? - ?Neural networks? - ?Petroleum reservoir evaluation? - ?Quality control? - ?Site selection
Uncontrolled terms: Agricultural modernizations? - ?BP neural networks? - ?Comprehensive qualities? - ?Comprehensive recognition? - ?Interactive optimization? - ?Multi characteristics? - ?Multisource data? - ?TOPSIS
Classification code: 454.3 Ecology and Ecosystems
Ecology and Ecosystems
? - ?512.1.2 Petroleum Deposits : Development Operations
Petroleum Deposits : Development Operations
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?913.3 Quality Assurance and Control
Quality Assurance and Control
Numerical data indexing: Percentage 9.60e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.024
Compendex references: YES
Database: Compendex
22. Algorithm and Experiment of Cocoon Segmentation and Location Based on Color and Area Feature
Accession number: 20182605370869
Authors: Liu, Mochen (1, 2); Xu, Ronghao (1); Li, Fade (1, 2); Song, Zhanhua (1, 2); Yan, Yinfa (1, 2); Han, Shouqiang (1)
Author affiliation: (1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai’an; 271018, China; (2) Shandong Provincial Key Laboratory of Horticultural Machinery and Equipment, Tai’an; 271018, China
Corresponding author: Yan, Yinfa(sd28@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 43-50
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To improve the lower efficiency of silkworm cocoon harvesting, an algorithm of cocoon image segmentation and coordinate location was proposed based on color and area characteristics, and a cocoon harvestor was designed based on machine vision. The monocular CMOS camera was firstly used in the algorithm to take image of checker cocooning frame. And the non-measurement distortion correction method was used to correct the image. Secondly, the camera model was calibrated with the internal parameters for the monocular two-dimensional visual measurement system. The image was smoothed via gray and mean shift filter method because the outer floss of the cocoon can cause wrong segmentation of the image in checker cocooning frame image. Then the binary image was obtained by threshold segmentation. Next, the binary image was processed by open operation and area feature extraction method to remove noise region. A part of the smaller noise connected components can be removed by the open operation. The cocoon region can be extracted by the area characteristic when the large area of the connected components can be removed. The center point coordinates of the cocoon region were got by the connected components calibration, and were mapped into the world coordinates through the equation that transformed image coordinates to world coordinates to get the cocoons’ positions in the Cartesian space. Finally, the cocoons were harvested by the cocoon harvestor. According to the experiment, the algorithm had the accuracy rate of 96.88% for the cocoon detection in the checker cocooning frame and less than 6.0 mm for the cocoon coordinate, which satisfied the requirement of the location of cocoon harvesting. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Image segmentation
Controlled terms: Animals? - ?Binary images? - ?Cameras? - ?Experiments? - ?Harvesting? - ?Image enhancement? - ?Image processing? - ?Location
Uncontrolled terms: Connected component? - ?Distortion correction? - ?Internal parameters? - ?Location algorithms? - ?Silkworm cocoons? - ?Threshold segmentation? - ?Visual measurements? - ?World coordinates
Classification code: 723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?742.2 Photographic Equipment
Photographic Equipment
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?901.3 Engineering Research
Engineering Research
Numerical data indexing: Percentage 9.69e+01%, Size 6.00e-03m
DOI: 10.6041/j.issn.1000-1298.2018.03.005
Compendex references: YES
Database: Compendex
23. Design and Experiment of Multi-mode Control System of Multiple Microscreen Drum Filters
Accession number: 20182605370905
Authors: Ye, Zhangying (1); Bao, Weijun (1); Zhang, Fengdeng (1); Zhang, Yadong (1); Li, Haijun (1); Zhu, Songming (1)
Author affiliation: (1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou; 310058, China
Corresponding author: Zhu, Songming(zhusm@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 334-340
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to realize the aim of controlling multiple microscreen drum filters with frame in recirculating aquaculture systems wastewater treatment processing, manage and maintain the system conveniently as well as save production costs, three kinds of operation modes control programs of ten microscreen drum filters were programmed with STEP 7 MicroWIN SP9 V4.0 software. The results of PLC real-time monitoring and debugging showed that the operation modes of the control system could be switched freely, and the microscreen drum filters could work normally in manual mode, automatic mode and timing mode. More concretely, taking one of the filters as an example, for manual mode, the backwashing can be controlled and stopped at any time; for automatic mode, the start and stop of the reducer and the backwashing pump were controlled by two level switches, when they were triggered by the water in the drum, the backwashing was performed, when the water level was dropped below the low level switch, backwashing would stop, and if the switches had malfunctions, backwashing would not proceed; for timing mode, the backwashing time and frequency can be set according to the water quality. In aquaculture environment, the use of multi-mode soft logic control system to make multiple microscreen drum filters’ reducers and backwashing pumps run and stop had the advantages of good stability, high degree of automation and low costs compared with the traditional hard logic control system which went wrong easily and was difficult to be overhauled, and the former can better cope with the problems of system failure. The research results can provide some references for the further improvements of control system of the microscreen drum filters and the automation integration of aquaculture equipments. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Quality control
Controlled terms: Aquaculture? - ?Bandpass filters? - ?Computer circuits? - ?Control systems? - ?Program debugging? - ?Programmable logic controllers? - ?Systems engineering? - ?Time switches? - ?Wastewater treatment? - ?Water levels ? - ?Water quality
Uncontrolled terms: Automation integration? - ?Degree of automation? - ?Drum filters? - ?Force analysis? - ?Real time monitoring? - ?Recirculating aquaculture system? - ?Solid particles? - ?Time and frequencies
Classification code: 445.2 Water Analysis
Water Analysis
? - ?452.4 Industrial Wastes Treatment and Disposal
Industrial Wastes Treatment and Disposal
? - ?703.2 Electric Filters
Electric Filters
? - ?721.3 Computer Circuits
Computer Circuits
? - ?723.1 Computer Programming
Computer Programming
? - ?731.1 Control Systems
Control Systems
? - ?732.1 Control Equipment
Control Equipment
? - ?821.3 Agricultural Methods
Agricultural Methods
? - ?913.3 Quality Assurance and Control
Quality Assurance and Control
? - ?961 Systems Science
Systems Science
DOI: 10.6041/j.issn.1000-1298.2018.03.041
Compendex references: YES
Database: Compendex
24. Effect of Two-step Pretreatment on Enzymatic Hydrolysis and Biogas Fermentation of Anaerobically Digested Fiber from VFAs Production
Accession number: 20182605370903
Authors: Wang, Dianlong (1, 2); Wu, Bo (3); Ai, Ping (4); Xin, Ya (1, 2); He, Mingxiong (3); Zhang, Yanlin (4)
Author affiliation: (1) School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huai’an; 223003, China; (2) Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, Huai’an; 223003, China; (3) Biomass Energy Technology Research Center, Biogas Institute of Ministry of Agriculture, Chengdu; 610041, China; (4) College of Engineering, Huazhong Agricultural University, Wuhan; 430070, China
Corresponding author: Ai, Ping(aiping@mail.hzau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 322-327
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The enzymatic hydrolysis and biogas fermentation of anaerobically digested fiber from volatile fatty acids (VFAs) production with rice straw were studied. The effects of two-step pretreatment of acetic acid and aqueous ammonia on the degradation of lignocellulose, glucose concentration, xylose concentration and biogas production were explored. The results showed that two-step pretreatment of acetic acid and aqueous ammonia can further degrade the hemicellulose and lignin in anaerobically digested fiber from VFAs production, and the recovery rate of cellulose was higher, which was 77.47%~81.44%. Among them, the mass fraction of cellulose was 56.82% and the mass fraction of hemicellulose was only 7.94% for pretreatment of 4% acetic acid and 10% aqueous ammonia at 121. Under the above pretreatment conditions, the enzymatic saccharification efficiency was the highest, the mass concentration of glucose was 47.46 g/L, and the glucose yield was 67.73%. Furthermore, the biogas production rate of anaerobically digested fiber from volatile fatty acids production pretreated by two-step pretreatment was better than those of acetic acid pretreatment alone and aqueous ammonia pretreatment alone. The highest biogas yield (414 mL/g) was obtained. Two-step pretreatment effectively improved the biogas yield of anaerobically digested fiber from VFAs production. Therefore, the research proved a new biorefinery way of anaerobically digested fiber. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Volatile fatty acids
Controlled terms: Acetic acid? - ?Ammonia? - ?Anaerobic digestion? - ?Biogas? - ?Cellulose? - ?Enzymatic hydrolysis? - ?Fermentation? - ?Fibers? - ?Glucose? - ?Lignin ? - ?Molecular biology? - ?pH? - ?Saccharification
Uncontrolled terms: Anaerobically digested fibers? - ?Biogas fermentation? - ?Biogas production rates? - ?Enzymatic saccharification? - ?Glucose concentration? - ?Pretreatment conditions? - ?Two-step pretreatment? - ?Volatile fatty acids (VFAs)
Classification code: 461.9 Biology
Biology
? - ?522 Gas Fuels
Gas Fuels
? - ?801.1 Chemistry, General
Chemistry, General
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?804.1 Organic Compounds
Organic Compounds
? - ?804.2 Inorganic Compounds
Inorganic Compounds
? - ?811.3 Cellulose, Lignin and Derivatives
Cellulose, Lignin and Derivatives
Numerical data indexing: Mass_Density 4.75e+01kg/m3, Percentage 1.00e+01%, Percentage 4.00e+00%, Percentage 5.68e+01%, Percentage 6.77e+01%, Percentage 7.94e+00%, Specific_Volume 4.14e-01m3/kg
DOI: 10.6041/j.issn.1000-1298.2018.03.039
Compendex references: YES
Database: Compendex
25. Dynamics of Large-scale Heavy-burden Parallel Stabilizing Cargo-receiving Platform
Accession number: 20182605370822
Authors: Li, Erwei (1, 2); Zhao, Tieshi (1, 2); Wang, Chang (1, 2); Bian, Hui (1, 2); Hu, Qiangqiang (1, 2); Ji, Wenjie (1, 2)
Author affiliation: (1) Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System Laboratory, Yanshan University, Qinhuangdao; 066004, China; (2) Key Laboratory of Advanced Forging and Stamping Technology and Science, Ministry of Education, Yanshan University, Qinhuangdao; 066004, China
Corresponding author: Zhao, Tieshi(tszhao@ysu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 411-417 and 346
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Large-scale heavy-burden parallel stabilizing cargo-receiving platform (PSCRP) plays an important role in the safe transporting of container cargo on the sea. According to the engineering needs, a PSCRP with three morph scissors mechanism (MSM) limbs was innovatively designed. The MSM limb, with the function of displacement amplification, contained a subclosed loop kinematic chain URRRU U (U denoted universal joint and R denoted revolute joint) and two SPS (S denoted spherical joint and P denoted prismatic pair) drive units. The MSM limb was equivalent with RPS kinematic chain when the two SPS drive units of the MSM limb were synchronously driven. In the non-inertial system, the parasitic displacement, velocity and acceleration of the upper-platform of the PSCRP were firstly analyzed based on vector method, and the position solution of the PSCRP mechanism was correspondingly obtained. Then the kinematics and dynamics analytic modellings of the PSCRP mechanism were established based on screw theory. Finally, the correctness of the models was verified by numerical example. A theoretical foundation was laid for the follow-up structural optimization and control of the PSCRP mechanism. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Joints (anatomy)
Controlled terms: Chains? - ?Dynamics? - ?Kinematics? - ?Screws? - ?Structural optimization
Uncontrolled terms: Displacement amplification? - ?Kinematics and dynamics? - ?Large-scale heavy-burden? - ?Non-inertial systems? - ?Optimization and control? - ?Parallel stabilizing platform? - ?Screw theory? - ?Theoretical foundations
Classification code: 461.3 Biomechanics, Bionics and Biomimetics
Biomechanics, Bionics and Biomimetics
? - ?602.1 Mechanical Drives
Mechanical Drives
? - ?605 Small Tools and Hardware
Small Tools and Hardware
? - ?921.5 Optimization Techniques
Optimization Techniques
? - ?931.1 Mechanics
Mechanics
DOI: 10.6041/j.issn.1000-1298.2018.03.052
Compendex references: YES
Database: Compendex
26. In-situ Sensing and Modeling Dynamics of Oxygen and Temperature in Grass Silage Bale of Suffering Aerobic Deterioration
Accession number: 20182605370880
Authors: Cheng, Qiang (1); Zhou, Haiyang (1); Shan, Guilin (1); Li, Menghua (1); Buescher, W. (2); Sun, Yurui (1)
Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Institute of Agricultural Engineering, University of Bonn, Bonn; 53115, Germany
Corresponding author: Sun, Yurui(pal@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 138-143
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aerobic deterioration of bale silage due to puncturing plastic cover by accident or feeding animals results in the nutrition and energy losses. The invasive oxygen that activates the aerobic microorganism to consume nutrition in silage, producing heat that raises the silage temperature, is a key factor being in charge of aerobic deterioration of silage. However, thus far, the in-situ sensing and modeling the dynamics of oxygen diffusion and temperature rising in bale silage has seldom been reported. For this, a Clark-electrode-based dissolved oxygen sensor was applied for in-situ measurement of oxygen concentration and temperature in bale silage. Based on the measurement data, a mathematical model coupling two-dimensional oxygen diffusion, microorganism growth and temperature rising was presented and validated. The tested grass silage was baled by using a baler from CLAAS company (Baler type: Rollant455) with two levels of dry matter contents (DM-1: 39.0%±1.3%; DM-2: 31.4%±2.1%). Each level had three replications. The results showed that the model simulations generally agreed with the in-situ measurements. The uncertainties between measurement and simulation were mainly due to the heterogeneity of silage density distribution. Moreover, a great quantity of water produced during aerobic deterioration changed the parameters in model such as decline of the diffusion rate of oxygen, increase of the heat capacity, resulting in lower predicting accuracy. Thus, the heterogeneity of silage density distribution and water-induced parameter variation should be included in proposed model for achieving higher predicting accuracy. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 18
Main heading: Dissolved oxygen
Controlled terms: Deterioration? - ?Diffusion in gases? - ?Energy dissipation? - ?Microorganisms? - ?Nutrition? - ?Specific heat? - ?Temperature? - ?Uncertainty analysis
Uncontrolled terms: Aerobic microorganisms? - ?Coupled modeling? - ?Density distributions? - ?Grass silages? - ?Measurement and simulation? - ?Microorganism growth? - ?Oxygen concentrations? - ?Oxygen diffusion
Classification code: 461.7 Health Care
Health Care
? - ?461.9 Biology
Biology
? - ?525.4 Energy Losses (industrial and residential)
Energy Losses (industrial and residential)
? - ?641.1 Thermodynamics
Thermodynamics
? - ?922.1 Probability Theory
Probability Theory
? - ?951 Materials Science
Materials Science
DOI: 10.6041/j.issn.1000-1298.2018.03.016
Compendex references: YES
Database: Compendex
27. Water and Salt Migration Mechanism and Competitive Ability in Wheat-Sunflower Intercropping System
Accession number: 20182605370893
Authors: Zhang, Zuowei (1, 2); Shi, Haibin (1); Liu, Deping (2); Li, Xianyue (1); Yan, Jianwen (1); Li, Hongyu (3)
Author affiliation: (1) College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Huhhot; 010018, China; (2) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (3) College of Agriculture, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Shi, Haibin(shi_haibin@sohu.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 243-251
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to quantitatively analyze the issues on the mutual use of water and the mechanism of salt migration, clear the relative competitive between the two species of intercropping in wheat-sunflower intercropping system in Hetao irrigation area, the experiment was conducted based on root separation method. The results showed that in wheat-sunflower intercropping system, the wheat utilized 78.23~94.23 m3/hm2of water by the side of sunflower. Meanwhile, the sunflower utilized 44.96~57.97 m3/hm2of water by the side of wheat. By the cross superposition effect of soil internal space, more soil water of 18.56~42.84 m3/hm2and 20.79~46.63 m3/hm2in wheat and sunflower belts may be utilized, the mean value of root soil EC in wheat and sunflower belts could be reduced by 1.32%~4.64% and 2.26%~3.16%, respectively. By the water and nutrient complementarity effect of soil internal space, more soil water of 15.12~26.40 m3/hm2and 47.60~57.44 m3/hm2in wheat and sunflower belts may be utilized, the mean value of root soil EC in wheat and sunflower belts could be reduced by 2.98%~4.69% and 1.82%~2.44%, respectively. For the relative competitive ability between the two species in intercropping system, the wheat was stronger than sunflower, limiting the cross superposition effect and water and nutrient complementarity effect of root in intercropping system was conducive to upgrading the relative competitive ability between the two species of sunflower. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 28
Main heading: Soil moisture
Controlled terms: Nutrients
Uncontrolled terms: Competitive ability? - ?Intercropping advantages? - ?Intercropping systems? - ?Migration mechanisms? - ?Relative aggressivity of species? - ?Separation methods? - ?Soil EC? - ?Superposition effect
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
DOI: 10.6041/j.issn.1000-1298.2018.03.029
Compendex references: YES
Database: Compendex
28. Pig Body Size Measurement Method Based on Mirror Reflection of Single Angle Point Cloud
Accession number: 20182605370887
Authors: Wang, Ke (1, 2); Guo, Hao (1, 2); Ma, Qin (1, 2); Su, Wei (1, 2); Hua, Mingrui (1); Zhu, Dehai (1, 2)
Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, China Agricultural University, Beijing; 100083, China
Corresponding author: Zhu, Dehai(zhudehai@263.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 187-195
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to overcome the problems of manual livestock body size measurement which is labor intensive, time consuming and stressful to the animals, a livestock body size measurement method based on the mirror reflection of single angle point cloud was proposed. A single depth camera Xtion was utilized to capture the sequences of point clouds of the scene, including pig and point clouds were stored in the computer, and then the scene point cloud, including the pig that bending degree of its back was not large was selected manually. Subsequently, the ground of the scene was deleted by using random sample consensus, the remaining scene point cloud was segmented based on Euclidean clustering, and then all the clusters were sorted according to the distance from the center of cluster to the coordinate origin, and the smallest one was extracted as the target pig. Pose normalization of the extracted pig was obtained by using a PCA based approach. Then, the pig symmetry plane was detected from the single angle point cloud by using the prior information of pig after pose normalization. Using the symmetry plane, the point clouds data of whole body surface of pig was obtained. Finally, by using the software developed by the institution of the authors, body size measurement was performed manually. The results showed that the average relative errors were 5.00% for body length measurement, 7.40% for hip width measurement and 5.74% for hip height measurement. This method offered a new way to measure the livestock body size. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Mammals
Controlled terms: Agriculture? - ?Anthropometry? - ?Cameras? - ?Mirrors
Uncontrolled terms: Average relative error? - ?Body sizes? - ?Depth camera? - ?Height Measurement? - ?Mirror reflections? - ?Point cloud? - ?Pose normalization? - ?Random sample consensus
Classification code: 461.3 Biomechanics, Bionics and Biomimetics
Biomechanics, Bionics and Biomimetics
? - ?741.3 Optical Devices and Systems
Optical Devices and Systems
? - ?742.2 Photographic Equipment
Photographic Equipment
? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control
Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing: Percentage 5.00e+00%, Percentage 5.74e+00%, Percentage 7.40e+00%
DOI: 10.6041/j.issn.1000-1298.2018.03.023
Compendex references: YES
Database: Compendex
29. Design and Experiment of Canvas Belt Combined Operation Machine for Potato Digging and Plastic Film Collecting
Accession number: 20182605370876
Authors: Dai, Fei (1); Guo, Xiaohuan (1); Zhao, Wuyun (1); Xin, Shanglong (1); Liu, Xiaolong (1); Wu, Zhengwen (2)
Author affiliation: (1) College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou; 730070, China; (2) Gansu Wuwei Business Flourishes Agricultural Machinery Manufacturing Co., Ltd., Wuwei; 733018, China
Corresponding author: Zhao, Wuyun(zhaowy@gsau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 104-113
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: According to the problems of field plastic film pollution with film mulching of double rows on a big ridge cultivation pattern of potato in northwest arid area of China, the canvas belt combined operation machine for potato harvesting and plastic film collecting was designed, which had synchronous implementation function of potato harvesting and plastic film collecting. Based on design and calculation analysis of key operation parts for prototype, the operation parameters of anti-twining device, canvas belt transporting film device and floating curl-up film mechanism were determined. The related experimental factors and their range of values were determined which affected the plastic film collecting ratio of the combined recovery machine. The Box-Behnken experimental design with four factors and three levels was performed, the mathematical models between the key parameters such as operation machine speed, film-curling driving roller rotating speed, transporting film axis rotating speed, transporting film sheet dip angle and plastic film collecting ratio were established, and then the effects of various parameters and their interactions were analyzed as well. The test results showed that effects order of four parameters on the plastic film collecting ratio were as follows: film-curling driving roller rotating speed, operation machine speed, transporting film axis rotating speed and transporting film sheet dip angle. The optimal working parameters were combined operation machine speed of 0.72 m/s, film-curling driving roller rotating speed of 303 r/min, transporting film axis rotating speed of 499 r/min and transporting film sheet dip angle of 29°. Confirmatory tests showed that the average value of the plastic film collecting ratio was 92.1%, compared with before the optimization it was dropped significantly. At the same time, under the operating parameters the obvious ratio of potato was 96.6% and the injury ratio of potato was 2.2%, which were up to the relevant work quality evaluation specification requirements. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Plastic films
Controlled terms: Design of experiments? - ?Experiments? - ?Quality control? - ?Rollers (machine components)? - ?Rotating machinery? - ?Speed
Uncontrolled terms: Box-Behnken experimental design? - ?Canvas belt type? - ?Combined operations? - ?Design and calculation? - ?Experimental factors? - ?Operation parameters? - ?Potato? - ?Specification requirement
Classification code: 601.1 Mechanical Devices
Mechanical Devices
? - ?601.2 Machine Components
Machine Components
? - ?817.1 Polymer Products
Polymer Products
? - ?901.3 Engineering Research
Engineering Research
? - ?913.3 Quality Assurance and Control
Quality Assurance and Control
Numerical data indexing: Percentage 2.20e+00%, Percentage 9.21e+01%, Percentage 9.66e+01%, Rotational_Speed 3.03e+02RPM, Rotational_Speed 4.99e+02RPM, Velocity 7.20e-01m/s
DOI: 10.6041/j.issn.1000-1298.2018.03.012
Compendex references: YES
Database: Compendex
30. Kinematic Error Analysis and Test of High-speed Plug Seeding Transplanting Machine for Greenhouse Based on Parallel Mechanism
Accession number: 20182605370866
Authors: Yang, Qizhi (1); Sun, Mengtao (1); Cai, Jing (1); Shi, Xinyi (1); Mao, Hanping (1); Gu, Jun (1)
Author affiliation: (1) School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang; 212013, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 18-27
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The greenhouse plug seedlings transplanting machines applied to industry are mostly with three-dimensional gantry structure. There are some obvious shortcomings like large size and inertia, low relatively rigidity, high prices and poor flexibility in operating capacity and not suitable for filling the gaps with seedlings or rejecting seedlings in high-speed operation. In view of these problems, it was intended to design a transplanting machine system with main body of parallel mechanism. The main structure of parallel transplanter and its five kinds of end effector of matching design were introduced. And then the quality of these end effectors was calculated. First of all, the rigid-flexible coupling multi-body dynamics model of parallel mechanism was established in ADAMS. Secondly, a longest diagonal trajectory was picked for simulation, and the error between the theoretical trajectory of the rigid model and the actual trajectory of the flexible model was compared. And then, the influence of changes of mass to motion error was set and explored by rigid-flexible coupling multi-body dynamics simulation in ADAMS and the feasibility of the parallel design was verified. It was found that there was oscillation at the end of the transplanting track. Finally, the positioning accuracy was tested by the physical prototype. Position error of the moving platform to each point was counted and the control system was compensated. It was turned out that the average positioning error was reduced from 7.611 mm to 1.208 mm. And most of the errors were systematic errors. During working process, the transplanting machine was with low deformation and high accuracy in taking and delivering stage during acceleration peak was 20 m/s2and average speed was 2 m/s. But when the average speed was 3 m/s and the acceleration peak was 30 m/s2, the error was increased and the radial support force needed to be improved. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Structural design
Controlled terms: Agricultural machinery? - ?End effectors? - ?Experiments? - ?Flexible couplings? - ?Greenhouses? - ?Mechanics? - ?Mechanisms? - ?Systematic errors? - ?Trajectories
Uncontrolled terms: Average positioning error? - ?Motion errors? - ?Multibody dynamics model? - ?Parallel mechanisms? - ?Positioning accuracy? - ?Rigid flexible coupling? - ?Theoretical trajectory? - ?Transplanting machine
Classification code: 408.1 Structural Design, General
Structural Design, General
? - ?601.3 Mechanisms
Mechanisms
? - ?602.2 Mechanical Transmissions
Mechanical Transmissions
? - ?731.5 Robotics
Robotics
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?821.6 Farm Buildings and Other Structures
Farm Buildings and Other Structures
? - ?901.3 Engineering Research
Engineering Research
? - ?931.1 Mechanics
Mechanics
Numerical data indexing: Acceleration 2.00e+01m/s2, Acceleration 3.00e+01m/s2, Size 7.61e-03m to 1.21e-03m, Velocity 2.00e+00m/s, Velocity 3.00e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.03.002
Compendex references: YES
Database: Compendex
31. Quality Evaluation Method of Peanut Seeding Based on Image Adaptive Classification Algorithm
Accession number: 20182605370867
Authors: Yang, Yang (1, 2); Miao, Wei (1); Zhang, Tie (3); Yang, Xuejun (3); Liu, Lu (1, 2); Chen, Liqing (1, 2)
Author affiliation: (1) School of Engineering, Anhui Agricultural University, Hefei; 230036, China; (2) Anhui Intelligent Agricultural Machinery Equipment Engineering Laboratory, Hefei; 230036, China; (3) Chinese Academy of Agricultural Mechanization Sciences, Beijing; 100083, China
Corresponding author: Chen, Liqing(13838470472@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 28-35
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to obtain the quality of peanut seedling rapidly and accurately, a method based on machine version was put forward to evaluate the quality of peanut seedling. Firstly, a field walking robot was developed which can ensure the robot accurate moving automatically and keep a constant speed. The peanut image information was achieved by the camera configured on the robot, and the picture coordinate information was recorded by global position system. The number of peanut seedlings, canopy projection area of peanut seedlings and the coordinate position of peanut root was achieved based on machine vision. Secondly, the evaluation index of seedling quality was purposed, including the peanut seedling deficiency rate and peanut vitality index. The peanut seedling deficiency rate was calculated by the number of peanut seedlings and the coordinate position of peanut root, and the peanut vitality index was computed by the canopy projection area of peanut seedlings. In order to obtain the peanut number and its canopy projection area, a fast and accurate recognition method of peanut based on image adaptive classification algorithm was purposed. Peanut seedling extraction operator was proposed to enhance the robustness, and the K-means clustering method was used to automatically determine the optimal threshold for image segmentation, which avoided the environment disturbance and separated the peanut plants correctly. Then by using the global image segmentation combined regional image segmentation, the single peanut seeding was separated for farmland. Finally, the envelop area and its center position coordinates of each peanut seeding were obtained through image detection technology. Through data validation, the average recognition rate reached 95.4%, which indicated that the algorithm was feasible. Compared with the manual test, the average error of peanut seedling spacing was 5.35 mm, and the correlation of peanut seedling deficiency was 0.991 (Pearson correlation coefficient). There was high consistency between manual and machine vision evaluation. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Oilseeds
Controlled terms: Cluster analysis? - ?Clustering algorithms? - ?Computer vision? - ?Correlation methods? - ?Image classification? - ?Image enhancement? - ?Image segmentation? - ?Quality control? - ?Robots
Uncontrolled terms: Adaptive classification? - ?Global position systems? - ?K-means clustering method? - ?Peanut seedling? - ?Peanut vitality index? - ?Pearson correlation coefficients? - ?Quality evaluation method? - ?Seedling quality
Classification code: 723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?723.5 Computer Applications
Computer Applications
? - ?731.5 Robotics
Robotics
? - ?821.4 Agricultural Products
Agricultural Products
? - ?903.1 Information Sources and Analysis
Information Sources and Analysis
? - ?913.3 Quality Assurance and Control
Quality Assurance and Control
? - ?922.2 Mathematical Statistics
Mathematical Statistics
Numerical data indexing: Percentage 9.54e+01%, Size 5.35e-03m
DOI: 10.6041/j.issn.1000-1298.2018.03.003
Compendex references: YES
Database: Compendex
32. Extraction of Cynanchum otophyllum Schneid. Coagulant and Its Effect on Milk Cake Manufacture
Accession number: 20182605370910
Authors: Mu, Shuo (1); Luo, Jie (1); Yang, Zibiao (2); Xiao, Chen (3); Sang, Yue (4)
Author affiliation: (1) Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing; 100083, China; (2) Department of Food Engineering and Management, Dali Vocational and Technical College of Agriculture and Forestry, Dali; 671003, China; (3) Key Laboratory of Functional Dairy, Co-constructed by Ministry of Education and Beijing Government, China Agricultural University, Beijing; 100083, China; (4) Hebei Engineering Research Center of Animal Product, Sanhe; 065200, China
Corresponding author: Luo, Jie(lizzyj925@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 367-372
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Cynanchum otophyllum Schneid. contains the coagulant protease. The leaves of Cynanchum otophyllum are widely used to produce the milk cake (a traditional cheese) by the minority ethnic region in Yunnan Province. Milk cake made by Cynanchum otophyllum leaves usually forms a soft curd. The object was to extract the active coagulant components based on the leaves of Cynanchum otophyllum and apply the extract into milk cake manufacture. The results showed that the optimal extraction temperature to produce Cynanchum otophyllum coagulant was 4, while the optimal extraction liquid-solid ratio was 20 mL/g and the optimal extraction solution was the citric acid-phosphate buffer (containing 150 mmol/L NaCl, 1 mmol/L Cys and EDTA). Compared with the milk cake made by the soaking solution of Cynanchum otophyllum leaves, the yield, protein and fat recovery rate of milk cake made by the extracted coagulant were significantly improved, with the recovery rate for protein and fat of 20.26 and 33.04 percentage points, respectively. Moreover, the milk cake made by extracted coagulant showed a more suitable hardness, higher degree of adhesion and more uniform gel network structure compared with the milk cake made by soaking solution. The study provided a reference for the development of Cynanchum otophyllum coagulant and promoted the industrialization of Yunnan traditional milk cake products. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 28
Main heading: Extraction
Controlled terms: Coagulation? - ?Manufacture? - ?Proteins? - ?Sodium chloride? - ?Textures
Uncontrolled terms: Cynanchum otophyllum Schneid? - ?Extraction solution? - ?Extraction temperatures? - ?Milk cake? - ?Milk-clotting? - ?Percentage points? - ?Traditional cheese? - ?Yield
Classification code: 537.1 Heat Treatment Processes
Heat Treatment Processes
? - ?802.3 Chemical Operations
Chemical Operations
? - ?804.1 Organic Compounds
Organic Compounds
Numerical data indexing: Molar_Concentration 1.00e+00mol/m3, Molar_Concentration 1.50e+02mol/m3, Specific_Volume 2.00e-02m3/kg
DOI: 10.6041/j.issn.1000-1298.2018.03.046
Compendex references: YES
Database: Compendex
33. Experiment Analysis on Flow-induced Pulsation and Noise in Outlet Conduit of Vertical Axial-flow Pumping System
Accession number: 20182605370881
Authors: Yang, Fan (1); Gao, Hui (1); Liu, Chao (2); Zhao, Haoru (1); Tang, Fangping (1, 2)
Author affiliation: (1) School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou; 225127, China; (2) Hydrodynamic Engineering Laboratory of Jiangsu Province, Yangzhou; 225009, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 144-149 and 165
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The pressure pulsation and flow-induced noise of outlet conduit have become two of important problems which have negative effect on axial-flow pumping system reliability. In order to investigate the flow-induced noise and pressure fluctuation characteristics of outlet conduit in axial-flow pumping system under different operating conditions, the fluctuating pressure and noised signals were obtained by pressure transduces mounted at different positions and a hydrophone in middle of outlet conduit. The experimental data were further analyzed by using short-time Fourier transform method at speeds of 1 450 r/min, 1 800 r/min and 2 200 r/min. The results showed that with the increase of rotational speed, the root mean square of the pulsating amplitude of each measuring point was increased in the same flow rate ratio. With the increase of flow rate ratio, the root mean square of pulsating amplitude was decreased for each measuring point at the same rotational speed, while there were differences in the dominant frequency of each measuring point in different flow rate ratios. The latter was adjacent to 51 Hz for the same measuring point at different flow rate ratios with different rotational speeds. The dominant frequency and subdominant frequency were not multiple relation with rotational frequency. The dominant frequency and subdominant frequency was in the range of 200 Hz. With the increase of rotational speed, sound pressure level of flow-induced noise was increased in the same flow rate ratio. With the increase of flow rate, the sound pressure level of flow-induced noise was decreased firstly and then increased at the same rotational speed. The rotational speed had great influence on sound pressure level of flow-induced noise under the optimal condition. The research result had reference value for study on pressure pulsation and flow-induced noise in outlet conduit of pumping system. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Flow rate
Controlled terms: Acoustic noise? - ?Acoustic variables measurement? - ?Acoustic wave transmission? - ?Axial flow? - ?Pumping plants? - ?Speed? - ?Testing
Uncontrolled terms: Different operating conditions? - ?Flow induced noise? - ?Flow pumping? - ?Fluctuating pressures? - ?Outlet conduits? - ?Pressure fluctuation? - ?Rotational frequency? - ?Short time Fourier transforms
Classification code: 446 Waterworks
Waterworks
? - ?631 Fluid Flow
Fluid Flow
? - ?631.1 Fluid Flow, General
Fluid Flow, General
? - ?751.1 Acoustic Waves
Acoustic Waves
? - ?751.4 Acoustic Noise
Acoustic Noise
? - ?941.2 Acoustic Variables Measurements
Acoustic Variables Measurements
Numerical data indexing: Frequency 2.00e+02Hz, Frequency 5.10e+01Hz, Rotational_Speed 1.45e+03RPM, Rotational_Speed 1.80e+03RPM, Rotational_Speed 2.20e+03RPM
DOI: 10.6041/j.issn.1000-1298.2018.03.017
Compendex references: YES
Database: Compendex
34. Experiment on Effect of Freezing and Thawing on Physical and Mechanical Properties of Saturated Channel Foundation Soil
Accession number: 20182605370898
Authors: Wang, Enliang (1); Jiang, Haiqiang (1); Fu, Qiang (1); Cui, Entong (1); Xie, Fei (1)
Author affiliation: (1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Fu, Qiang(fuqiang0629@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 287-294
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Freezing-thawing effect is the main inducement for the damage of channel in cold region, and the different forms of damage caused by it have seriously restricted the grain production. To explore the influence of freeze-thaw on physical and mechanical properties of saturated silty clay, after 0~11 cycles for saturated soil in the low temperature environment simulation test chamber, indoor geotechnical engineering test was applied, and grey correlation degree was used to analyze the interaction effect of soil properties and the following conclusions were drawn: with the increase of freeze-thaw cycle times, the cohesive force of saturated soil was decreased gradually with the form of single exponential function and the internal friction angle was increased gradually. The effect of freeze-thaw on cohesion was obviously attenuated after initial freezing and thawing. With the increase of freezing and thawing cycles, the damage coefficient Kφwas in a logarithmic function form change and the KCwas in an exponential function form change. The coefficient of thermal conductivity and average dry density was negatively correlated with freeze-thaw cycle times, whereas the average porosity rate and permeability coefficient were positively correlated with freeze-thaw cycle times. Compared with the freeze-thaw action, the average porosity rate had a greater influence on the cohesion force, thermal conductivity, average dry density and permeability coefficient. For a single specimen, the influence of physical properties on the change of mechanical properties was in a descending order of average porosity, average dry density, permeability coefficient and thermal conductivity. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 24
Main heading: Mechanical permeability
Controlled terms: Conductive plastics? - ?Density (specific gravity)? - ?Environmental testing? - ?Exponential functions? - ?Freezing? - ?Geotechnical engineering? - ?Hydraulic conductivity? - ?Internal friction? - ?Mechanical properties? - ?Porosity ? - ?Soil testing? - ?Soils? - ?Temperature? - ?Thawing? - ?Thermal conductivity
Uncontrolled terms: Coefficient of thermal conductivities? - ?Cohesion force? - ?Dry density? - ?Freeze-thaw? - ?Internal friction angle? - ?Low temperature environment? - ?Physical and mechanical properties? - ?Single-exponential function
Classification code: 409 Civil Engineering, General
Civil Engineering, General
? - ?481 Geology and Geophysics
Geology and Geophysics
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?632.1 Hydraulics
Hydraulics
? - ?641.1 Thermodynamics
Thermodynamics
? - ?708.2 Conducting Materials
Conducting Materials
? - ?921 Mathematics
Mathematics
? - ?931.2 Physical Properties of Gases, Liquids and Solids
Physical Properties of Gases, Liquids and Solids
? - ?951 Materials Science
Materials Science
DOI: 10.6041/j.issn.1000-1298.2018.03.034
Compendex references: YES
Database: Compendex
35. Vegetable Pest Counting Algorithm Based on Visual Perception
Accession number: 20182605370870
Authors: Xiao, Deqin (1, 2); Zhang, Yukang (1); Fan, Meihong (3); Pan, Chunhua (1); Ye, Yaowen (1); Cai, Jiahao (1)
Author affiliation: (1) College of Mathematics and Informatics, South China Agricultural University, Guangzhou; 510642, China; (2) Guangdong Province Agricultural Data Engineering Research Center, Guangzhou; 510642, China; (3) Guangzhou Golden Farm Co., Ltd., Guangzhou; 511470, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 51-58
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Due to the varying degree of various pests’ damage, people tend to make some counter measures to protect the vegetables. Up to now, the most common method is to spray pesticides on vegetable pests. Farmers often lead to the excessive use of pesticides for lack of information about the number of pests. Traditionally, manual counting methods are carried out on the number of pests. It needs large labor costs, heavy workload, with subjective and other shortcomings, and using machine vision to monitor vegetable pests is a popular method recently. But the vast majority of current visual methods are to be carried out under the condition of ideal laboratory, which cannot be directly applied to pest monitoring in the field. Using visual perception technology to identify pests has become a hotspot in the field of agricultural engineering in recent years. Because of the shortcomings of the pests identification under the current field conditions, a new algorithm for counting the southern vegetable pests was studied by using yellow sticky trap. Based on the classical image processing algorithm, some new algorithms, including pest image segmentation sub-algorithm based on the structure of random forest, feature extraction sub-algorithm of irregular structure, background removal sub-algorithm, interference target removal sub-algorithm and detection model counting sub-algorithm were proposed. Those sub-algorithms were integrated to create a vegetable pest count algorithm based on visual perception (VPCA-VP). The images taken in the field environment were used for experimentation and analysis, and 9351 thrips, 202 whiteflies and 23 fruit flies were recognized. Compared with the artificial count, the accuracy rate of the vegetable pest counting algorithm based on visual perception was 94.89%. Among them, the accuracy rate of the thrip was 93.19%, the accuracy rate of the whitefly was 91% and the exact rate of the fruit fly was 100%. The algorithm had good performance and achieved the rapid counting demand, which had wide application prospect in farmland monitoring. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 23
Main heading: Vegetables
Controlled terms: Agricultural machinery? - ?Decision trees? - ?Extraction? - ?Feature extraction? - ?Fruits? - ?Identification (control systems)? - ?Image segmentation? - ?Pesticides? - ?Vision? - ?Wages
Uncontrolled terms: Application prospect? - ?Background removal? - ?Descriptors? - ?Detection models? - ?Image processing algorithm? - ?Irregular structures? - ?Random forests? - ?Visual perception
Classification code: 731.1 Control Systems
Control Systems
? - ?802.3 Chemical Operations
Chemical Operations
? - ?803 Chemical Agents and Basic Industrial Chemicals
Chemical Agents and Basic Industrial Chemicals
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?821.4 Agricultural Products
Agricultural Products
? - ?912.4 Personnel
Personnel
? - ?961 Systems Science
Systems Science
Numerical data indexing: Percentage 1.00e+02%, Percentage 9.10e+01%, Percentage 9.32e+01%, Percentage 9.49e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.006
Compendex references: YES
Database: Compendex
36. Lysosomal Cathepsins in Apoptosis-inducing-factor-mediate Apoptosis of Bovine Muscle during Postmortem Aging
Accession number: 20182605370908
Authors: Zhang, Jiaying (1); Yu, Qunli (1); Han, Ling (1); Li, Hang (2); Yin, Yuanhu (3); Han, Mingshan (4)
Author affiliation: (1) College of Food Science and Engineering, Gansu Agricultural University, Lanzhou; 730070, China; (2) Chongqing Hengdu Agricultural Development Co., Ltd., Fengdu; 408200, China; (3) Heilongjiang Institute of Veterinary Science, Qiqihar; 161000, China; (4) Inner Mongolia Kerchin Cattle Industry Co., Ltd., Tongliao; 028000, China
Corresponding author: Yu, Qunli(yuqunlihl@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 354-360
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: With the aim to investigate apoptosis-inducing-factor (AIF)-mediate apoptosis and mechanism of lysosomal cathepsins involved in AIF activation of bovine muscle during postmortem aging, six healthy Simmental crossbreeding local yellow cattle were slaughtered and longissimus thoracic muscles were removed from the carcasses then aged at 4 for 6 h, 12 h, 24 h, 72 h, 120 h and 168 h. At the end of each storage period, ROS content, lysosomal membrane stability, cathepsins activities, mitochondrial membrane permeability, the expression of AIF and nuclear morphology were measured. The results suggested that ROS content was decreased from 0 h to 6 h, but it was significantly increased from 6 h to 168 h during postmortem aging (P ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 29
Main heading: Cell death
Controlled terms: Cell membranes? - ?Mammals? - ?Mitochondria? - ?Muscle
Uncontrolled terms: Apoptosis-inducing factors? - ?Bovine? - ?Induced apoptosis? - ?Lysosomal cathepsins? - ?Lysosomal membrane stabilities? - ?Mitochondrial membranes? - ?Nuclear morphology? - ?Storage periods
Classification code: 461.2 Biological Materials and Tissue Engineering
Biological Materials and Tissue Engineering
? - ?461.9 Biology
Biology
Numerical data indexing: Time 0.00e+00s to 2.16e+04s, Time 0.00e+00s to 4.32e+04s, Time 2.16e+04s, Time 2.16e+04s to 6.05e+05s, Time 2.59e+05s, Time 4.32e+04s, Time 4.32e+05s, Time 6.05e+05s, Time 8.64e+04s
DOI: 10.6041/j.issn.1000-1298.2018.03.044
Compendex references: YES
Database: Compendex
37. Enhancement of Volatile Fatty Acids Production from Rice Straw via Anarobic Digestion with Pretreatments
Accession number: 20182605370901
Authors: Ai, Ping (1); Tian, Qihuan (1); Xi, Jiang (2); Jiang, Hua (3); Peng, Jingjing (1); Yang, Zhihao (1)
Author affiliation: (1) College of Engineering, Huazhong Agricultural University, Wuhan; 430070, China; (2) Biogas Institute, Ministry of Agriculture, Chengdu; 610041, China; (3) Ezhou Eco Energy Office, Ezhou; 436000, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 309-316
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The use of anaerobic fermentation technology of agriculture wastes for the production of volatile fatty acids (VFAs) is a promising approach. The aim of this investigation was to evaluate the different pretreatments of rice straw like hydrothermal, acid and alkali on the AD process parameters and the VFAs production at mesophilic (35), thermophilic (55) and hyper-thermophilic (70). The results showed that the alkaline pretreatment was more favorable for VFAs production than acid and hydrothermal treatments. The lignin degradation rate with Ca(OH)2at 35 was 63.27%, which was much higher than that of hydrothermal treatment group (12.45%) and that of HCl treatment group (12.40%). The pH value was in the range of 6±0.5 at alkali pretreatment. The efficiency of converting the degraded straw into VFAs at mesophilic was high, resulting in the highest VFAs yield. The VFAs yield with per degradation volatile solid in the pretreatment group was 0.79 ~ 1.20 g/g and 0.24~0.51 g/g at 35 and 70, respectively. The preferred alkali treatment group gave a yield of VFAs production of 0.25 g/g at 35 and 0.09 g/g at 70, respectively. The results can provide some theoretical basis to enhance the VFAs production from rice straw under different conditions. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Volatile fatty acids
Controlled terms: Agricultural wastes? - ?Alkalinity? - ?Anaerobic digestion? - ?Chlorine compounds? - ?Degradation? - ?Fermentation? - ?Hydrated lime? - ?Speed control? - ?Temperature
Uncontrolled terms: Agriculture wastes? - ?Alkali pretreatment? - ?Alkaline pretreatment? - ?Anaerobic fermentation? - ?Hydrothermal treatments? - ?Pre-Treatment? - ?Rice straws? - ?Volatile fatty acids (VFAs)
Classification code: 641.1 Thermodynamics
Thermodynamics
? - ?731.3 Specific Variables Control
Specific Variables Control
? - ?801.1 Chemistry, General
Chemistry, General
? - ?802.2 Chemical Reactions
Chemical Reactions
? - ?804.1 Organic Compounds
Organic Compounds
? - ?804.2 Inorganic Compounds
Inorganic Compounds
? - ?821.5 Agricultural Wastes
Agricultural Wastes
Numerical data indexing: Percentage 1.24e+01%, Percentage 6.33e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.037
Compendex references: YES
Database: Compendex
38. Rapid Detection of Moisture Content in Maize Leaves Based on Transmission Spectrum
Accession number: 20182605370885
Authors: Sun, Hong (1); Chen, Xiang (1); Sun, Zichun (1); Li, Minzan (1); Zhang, Man (1); Wu, Jingzhu (2)
Author affiliation: (1) Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing; 100083, China; (2) Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing Technology and Business University, Beijing; 100048, China
Corresponding author: Li, Minzan(limz@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 173-178
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to detect the moisture content of maize leaves quickly and nondestructively, a portable plant leaf moisture detector was developed based on near infrared spectroscopy and wireless sensor network. The structure was designed according to the principle of transmission spectrum. The device could be divided into data acquisition node and data receiving node. And the ZigBee network was used to transfer the data between them. There were three modules in the data acquisition node, including a signal acquisition module, a signal processing module and a signal transmission module. The data acquisition node mainly completed the acquisition, amplification and filtering of the spectral data, and then sent it to the PDA through the master chip JN5168. The data receiving node was designed with a data receiving module and a PDA. The signal acquisition module was the key component with a light source and a sensor. The active LED lights in near-infrared band (890 nm and 980 nm) sent light, and the PIN type photodiode was used to measure the transmission signal. After the signal amplification and filtering, it was sent to the data receiving node by the ZigBee network. The parameters were calculated, including T890, T980, ratio vegetation index (RVI), modified normalized difference water vegetation index (MNDWI) and so on. The field test was conducted. The correlation between the parameters and water content was analyzed. The best application location of maize leaves was recommended. The results showed that the best detecting range was 70%~80% and the resolution was 0.3%. The detection model was established by T890, T980and MNDWI, with RC2=0.854, RV2=0.849, and root mean square error of 0.010 3. It could help to detect leaf moisture content nondestructively in the field. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 18
Main heading: Signal processing
Controlled terms: Data acquisition? - ?Infrared devices? - ?Light sources? - ?Mean square error? - ?Moisture? - ?Moisture determination? - ?Near infrared spectroscopy? - ?Plasma diagnostics? - ?Sensor nodes? - ?Transmissions ? - ?Vegetation? - ?Water content? - ?Zigbee
Uncontrolled terms: Data acquisition nodes? - ?Maize leaves? - ?Normalized differences? - ?Ratio vegetation indices? - ?Root mean square errors? - ?Signal amplifications? - ?Transmission spectrums? - ?Vegetation index
Classification code: 602.2 Mechanical Transmissions
Mechanical Transmissions
? - ?716.1 Information Theory and Signal Processing
Information Theory and Signal Processing
? - ?722 Computer Systems and Equipment
Computer Systems and Equipment
? - ?722.3 Data Communication, Equipment and Techniques
Data Communication, Equipment and Techniques
? - ?723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?922.2 Mathematical Statistics
Mathematical Statistics
? - ?932.3 Plasma Physics
Plasma Physics
? - ?944.2 Moisture Measurements
Moisture Measurements
Numerical data indexing: Percentage 3.00e-01%, Size 8.90e-07m, Size 9.80e-07m
DOI: 10.6041/j.issn.1000-1298.2018.03.021
Compendex references: YES
Database: Compendex
39. Design on Push Structure of Centrifugal Cone Seed-metering Device and Its Filling Mechanism Analysis
Accession number: 20182605370873
Authors: Li, Mutong (1); Li, Tianyu (1); Guan, Xiaodong (1); Zhao, Guangkuo (1); Zhou, Fujun (1)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China
Corresponding author: Zhou, Fujun(fjzhou@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 77-85
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Aiming at the bottleneck problem that hinders the high-speed work development of mechanical seed-metering device, a kind of centrifugal cone direction push way for grain filling was proposed, the influence of the grain in the internal cavity filling properties of stress types and mechanical laws was analyzed, the composite filling stress mathematical model was established, the effective way to improve the filling force was found out through theoretical analysis, and the mathematical model was gradually dressed with the help of Matlab and ORIRIN drawing software to determine the optimal key structure parameters. Through the single bench test using discrete element simulation software EDEM virtual simulation of centrifugal push structure, and the cavity structure of centrifugal cone disc metering device were tested, the superiority of additional centrifugal push structure was demonstrated, test results showed that in the 7~13 km/h high speed operation, the average leakage sowing index of Indus cavity structure cone disc metering device was reduced by 2.52%, at the same time, the postprocessing function measured marker granule filling variation and numerical prediction value basically had the same trend, which verified the feasibility of the theoretical model, maximized the play of a layer of centrifugal force on the pre filling grain, and to further expand the effective filling area, the study provided theoretical basis and reference for the centrifugal cone type high-speed exhaust device design and development. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Filling
Controlled terms: Centrifugation? - ?MATLAB? - ?Pneumatic materials handling equipment? - ?Software testing? - ?Stresses? - ?Structural optimization
Uncontrolled terms: Contrast experiment? - ?Discrete element simulation? - ?High Speed? - ?High-speed operation? - ?Mechanism analysis? - ?Numerical predictions? - ?Seed metering devices? - ?Theoretical modeling
Classification code: 691.1 Materials Handling Equipment
Materials Handling Equipment
? - ?691.2 Materials Handling Methods
Materials Handling Methods
? - ?723.5 Computer Applications
Computer Applications
? - ?802.3 Chemical Operations
Chemical Operations
? - ?921.5 Optimization Techniques
Optimization Techniques
Numerical data indexing: Percentage 2.52e+00%, Velocity 1.94e+00m/s to 3.61e+00m/s
DOI: 10.6041/j.issn.1000-1298.2018.03.009
Compendex references: YES
Database: Compendex
40. Responses Analysis of Lettuce Leaf Pollution in Cadmium Stress Based on Computer Vision
Accession number: 20182605370884
Authors: Sun, Jun (1); Zhang, Yuechun (1); Mao, Hanping (2); Wu, Xiaohong (1); Chen, Yong (1); Weng, Qipeng (1)
Author affiliation: (1) School of Electrical and Information Engineering, Jiangsu University, Zhenjiang; 212013, China; (2) Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang; 212013, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 166-172
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to achieve nondestructive detection of heavy metal cadmium in lettuce leaves, computer vision technology was used as the research method, which combined image processing method and feature selection method, to identify four gradients of heavy metal cadmium stress lettuce leaves. First of all, the leaf image of lettuce was obtained by digital camera. Then, the K-means clustering algorithm was used to segment the image, and the color, shape and texture of the image were extracted from the extracted target image. A total of 46 image features were obtained. In order to make the model easier and reduce the amount of data, the image feature was dimensioned by competitive adaptive reweighted sampling (CARS) and variable importance analysis based on random variable combination (VIAVC). The partial least squares discriminant analysis (PLS-DA) and random forest (RF) were used to construct the model for identification of cadmium stress in lettuce. The results showed that in the seven combined feature models, the optimal model was given by the model of color, shape and texture fusion. The accuracy of the training set classification was 92%. The color, shape and texture fusion features were reduced by CARS and VIAVC, and it was found that the dimensionality and visualization of VIAVC were better than those of CARS. Using the reduced dimension of the low-dimensional mapping point to build the model, the accuracy of the training set classification and accuracy of the prediction set of RF model were higher than those of the PLS-DA. Among them, the accuracy of the training set and predictive set classification based on VIAVC dimensionality reduction were 98.0% and 96.0%, respectively. It can be seen that the RF model based on VIAVC dimensionality can better identify the lettuce leaves with different cadmium stress levels under the premise of greatly reducing the feature dimension. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 30
Main heading: Computer vision
Controlled terms: Cadmium? - ?Clustering algorithms? - ?Coherent scattering? - ?Color? - ?Decision trees? - ?Discriminant analysis? - ?Feature extraction? - ?Image segmentation? - ?Importance sampling? - ?Least squares approximations ? - ?Metal analysis? - ?Principal component analysis
Uncontrolled terms: Computer vision technology? - ?Feature selection methods? - ?Image feature extractions? - ?K-Means clustering algorithm? - ?Lettuce? - ?Nondestructive detection? - ?Partial least squares discriminant analyses (PLSDA)? - ?VIAVC
Classification code: 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
? - ?711 Electromagnetic Waves
Electromagnetic Waves
? - ?741.1 Light/Optics
Light/Optics
? - ?741.2 Vision
Vision
? - ?903.1 Information Sources and Analysis
Information Sources and Analysis
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922 Statistical Methods
Statistical Methods
? - ?922.2 Mathematical Statistics
Mathematical Statistics
? - ?961 Systems Science
Systems Science
Numerical data indexing: Percentage 9.20e+01%, Percentage 9.60e+01%, Percentage 9.80e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.020
Compendex references: YES
Database: Compendex
41. Detection of Retrogradation Degree of Starch Based on Near-infrared and Mid-infrared Spectroscopy
Accession number: 20182605370906
Authors: Zou, Xiaobo (1); Cui, Xueping (1); Shi, Jiyong (1); Hu, Xuetao (1); Xu, Yiwei (1); Xue, Jin (1)
Author affiliation: (1) School of Food and Biological Engineering, Jiangsu University, Zhenjiang; 212013, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 341-346
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Starch food is easy to retrograde during processing, transportation and storage, and the degree of retrogradation seriously affects the nutritional value and shelf-life of starch food. Soretrogradation degree is really expected to determine rapidly and non-destructively during storage, that is near-infrared and mid-infrared spectroscopy. The near-infrared and mid-infrared spectra of starch in different storage times (0 d, 1 d, 2 d, 3 d, 4 d, 5 d, 10 d, 15 d and 20 d) were collected. There was a certain associations between spectra data and chemical reference detected by spectrophotometry, then chemometrics (partial least squares, PLS) were used to establish the prediction model of starch retrogradation with near-infrared, mid-infrared and fusion data, the best one that had higher correlation coefficient and lower error was chosen. The results showed that the backward interval partial least squares (biPLS) prediction model of fusion technology was the best one, the root mean square error of cross-validation (RMSECV) and root mean square error of prediction (RMSEP) were 6.79% and 9.52%, and the calibration and prediction correlation coefficient were 0.965 5 and 0.931 3, respectively. The results indicated that the fusion spectroscopy was superior to any single spectral technique, which could provide more accurately information of starch. Hence, the infrared spectroscopy could detect the retrogradation degree of corn starch rapidly and non-destructively, provide guidance for the processing of starchy food, and ensure the quality and safety of starchy food. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 19
Main heading: Infrared devices
Controlled terms: Digital storage? - ?Errors? - ?Food safety? - ?Food storage? - ?Forecasting? - ?Infrared spectroscopy? - ?Least squares approximations? - ?Mean square error? - ?Near infrared spectroscopy? - ?Starch
Uncontrolled terms: Correlation coefficient? - ?Interval partial least squares? - ?Mid-infrared spectroscopy? - ?Partial least square (PLS)? - ?Quality and safeties? - ?Root mean square errors? - ?Root-mean-square error of predictions? - ?Starch retrogradation
Classification code: 461.6 Medicine and Pharmacology
Medicine and Pharmacology
? - ?694.4 Storage
Storage
? - ?722.1 Data Storage, Equipment and Techniques
Data Storage, Equipment and Techniques
? - ?804.1 Organic Compounds
Organic Compounds
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922.2 Mathematical Statistics
Mathematical Statistics
Numerical data indexing: Percentage 6.79e+00%, Percentage 9.52e+00%
DOI: 10.6041/j.issn.1000-1298.2018.03.042
Compendex references: YES
Database: Compendex
42. Spatial-temporal Characteristics and Source Analysis of Newly Increased Cultivated Land in Beijing-Tianjin-Hebei Region from 2013 to 2015
Accession number: 20182605370889
Authors: Yang, Jianyu (1, 2); Zhang, Tingting (1); Chen, Zheng (3); Zhang, Chao (1, 2); Zhao, Dongling (1); Lin, Shangwei (1)
Author affiliation: (1) College of Information and Electrical Engineering, China Agricultural University, Beijing; 100083, China; (2) Key Laboratory for Agricultural Land Quality Monitoring and Control, Ministry of Land and Resources, Beijing; 100035, China; (3) Land Management Center, Ministry of Land and Resources, Beijing; 100035, China
Corresponding author: Zhao, Dongling(zhaodongling@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 205-213
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Based on the data of newly increased cultivated land from 2013 to 2015 at the district and county-level in Beijing-Tianjin-Hebei region, the whole feature of the newly increased cultivated land, the feature of different types newly increased cultivated land were explored, and the newly increased cultivated land was analyzed from the perspective of different sources in-depth. The research methods included gravity center model, Gini-coefficient, geographic concentration and some methods of statistical analysis. Research results showed that from 2013 to 2015, all of the new cultivated land in the Beijing-Tianjin-Hebei region was mainly concentrated in the middle east plain, western mountainous areas and the northern plateau areas. Analyzing the newly increased cultivated land in different years, the area of the newly increased cultivated land in Beijing-Tianjin-Hebei region was decreased first and then increased; the gravity center was transferred from north-east to south-west. And the newly cultivated land was highly concentrated. Gry land was mainly cultivated land types in Beijing-Tianjin-Hebei region, but the newly increased irrigated land was mainly newly increased cultivated land type. The largest proportion was land consolidation’s newly increased cultivated land in rural. The main source of the newly increased cultivated land was grassland, so that ecological problems were becoming more prominent. On this basis, reasonable suggestions were put forward for Beijing-Tianjin-Hebei region in the future land remediation work. It was suggested that the Beijing-Tianjin-Hebei project should adjust measures to local conditions in the future, increase water efficiency, and pay attention to the construction of ecological civilization. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 28
Main heading: Land use
Controlled terms: Remediation
Uncontrolled terms: Beijing-tianjin-hebei regions? - ?Cultivated lands? - ?Gini coefficients? - ?Gravity centers? - ?Land consolidations? - ?Spatial-temporal characteristics
Classification code: 403 Urban and Regional Planning and Development
Urban and Regional Planning and Development
? - ?454.2 Environmental Impact and Protection
Environmental Impact and Protection
DOI: 10.6041/j.issn.1000-1298.2018.03.025
Compendex references: YES
Database: Compendex
43. Simulation of Landuse Based on BRT_DC_Pd Model
Accession number: 20182605370891
Authors: Wang, Yuhang (1); Yu, Qiang (1); Yue, Depeng (1); Zhang, Qibin (1); Ma, Huan (1)
Author affiliation: (1) Beijing Key Laboratory of Precision Forestry, Beijing Forestry University, Beijing; 100083, China
Corresponding author: Yue, Depeng(yuedepeng@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 225-234
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The BRT_Dyna-CLUE_Patch-dynamics model was formed by improving Dyna-CLUE model, by embedding BRT model and Patch-dynamics model. Based on the landuse situation in Dengkou County in 2006, a case study was conducted in Dengkou County, a typical county in the ecologically fragile region. The BRT_Dyna-CLUE_Patch-dynamics model was used to simulate the landuse situation in 2016 in Dengkou County and compared with the Logistic_CA_Markov model which was currently used more. The results showed that the Kappa coefficient of the Logistic_CA_Markov model was 0.721 4, and the Kappa coefficient of the BRT_Dyna-CLUE_Patch-dynamics model was 0.782 6. The simulation results of the two combinatorial models were highly accurate and both were highly consistent with the real interpretation results. BRT_Dyna-CLUE_Patch-dynamics model had high simulation accuracy and good result. Therefore, it is feasible to apply the BRT_Dyna-CLUE_Patch-dynamics model to the simulation and forecast of local landuse change in order to provide some reference for the implementation of local ecological control and related policies. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 35
Main heading: Dynamics
Uncontrolled terms: Combinatorial models? - ?Dengkou counties? - ?Dyna-CLUE? - ?Ecologically fragile regions? - ?Kappa coefficient? - ?Land-use change? - ?Patch dynamics? - ?Simulation accuracy
DOI: 10.6041/j.issn.1000-1298.2018.03.027
Compendex references: YES
Database: Compendex
44. Design and Test of Stubble-breaking Components on Strip Subsoiling and Stubble-breaking Machine
Accession number: 20182605370875
Authors: Zhao, Yanzhong (1); Wang, Yunxing (1); Liu, Haitao (1); Yang, Yueqian (1); Gong, Zhenping (2)
Author affiliation: (1) College of Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) College of Agronomy, Northeast Agricultural University, Harbin; 150030, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 94-103
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In the northeast ridge area, the stubble treatment and subsoiling operation before planting can improve the quality of seeding and promote the growth of crop. In the process of operation, available machines for subsoiling and stubble-breaking exist some problems, including the large amount of soil disturbance, the not ideal effect of stubble cleaning and stubble-breaking roller is easy to tangle with grass etc. At the same time, in order to adapt to the technology mode of conservation tillage in the northeast cold, and meet the agronomic requirements of ridge deep loosening stubble, a type of subsoiling and stubble-breaking machine was designed, of which the structure of stubble-breaking parts, subsoiling component and ridge forming parts were designed. Also, the field experiments were carried out to study the structure and operating parameters affected the machine. The influence factors of field experiment included the speed of working machine, the depth of stubble-breaking and the sliding cutting angle of sidelong edge for stubble-breaking blade. Evaluation indices included the rate of stubble-breaking and the depth stability coefficient of stubble breaking. The results showed that when the speed of working was 2.8 km/h, the depth of stubble-breaking was 84.9 mm, the sliding cutting angle of sidelong edge for stubble-breaking blade was 6.5°, the rate of stubble-breaking was 93.26%, the depth stability coefficient of stubble breaking was 95.25%. The stubble-breaking effect of stubble-breaking machine was ideal, which met the quality requirements in working. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 27
Main heading: Machine components
Controlled terms: Seed? - ?Soil conservation
Uncontrolled terms: Conservation tillage? - ?Field test? - ?Operating parameters? - ?Parameter optimization? - ?Quality requirements? - ?Sliding cutting angles? - ?Soil disturbances? - ?Stability coefficient
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?601.2 Machine Components
Machine Components
? - ?821.4 Agricultural Products
Agricultural Products
Numerical data indexing: Percentage 9.33e+01%, Percentage 9.52e+01%, Size 8.49e-02m, Velocity 7.78e-01m/s
DOI: 10.6041/j.issn.1000-1298.2018.03.011
Compendex references: YES
Database: Compendex
45. Improved FCM Method for Pore Identification Based on Grayscale-Gradient Features
Accession number: 20182605370897
Authors: Zhao, Yue (1, 2); Han, Qiaoling (1, 2); Zhao, Yandong (1, 2)
Author affiliation: (1) School of Technology, Beijing Forestry University, Beijing; 100083, China; (2) Beijing Laboratory of Urban and Rural Ecological Environment, Beijing Forestry University, Beijing; 100083, China
Corresponding author: Zhao, Yandong(yandongzh@bjfu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 279-286
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The topological structure of soil pores determined the ability of soil moisture retention and conductivity, which had a significant impact on soil ecological processes. However, the existing pore identification methods had the problems of low pore identification accuracy and low operational efficiency. In order to solve the problems, a fast fuzzy C-means (GFFCM) method based on the grayscale-gradient features of soil CT images for pore identification was proposed. The grayscale-gradient two-dimensional feature matrix was established by Laplace operator to describe the characteristics of pore boundary. Combined with soil prior knowledge, the initial membership matrix was constructed and the number of clusters was estimated. Then, based on the determined initial conditions, the traditional fuzzy C-means was used to realize the fuzzy division of soil structure. Finally, the fuzzy clustering result was optimized with the GFFCM method by pore identification standard to accurately identify the soil pore structure. The methods were applied to the soil CT images with unsaturated state and compared with the traditional FCM method and the fast FCM method (FFCM), the GFFCM method had the lowest identification error rate and the smallest number of iterations, which indicated that the GFFCM method had the highest recognition accuracy. Besides, the method could overcome the shortcomings of the traditional FCM method in initializing the membership matrix and number of clusters, so it solved the problem that the initial value influenced the identification accuracy and had the advantage of high computational efficiency. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Image processing
Controlled terms: Clustering algorithms? - ?Computational efficiency? - ?Computerized tomography? - ?Efficiency? - ?Fuzzy clustering? - ?Fuzzy systems? - ?Matrix algebra? - ?Problem solving? - ?Soil moisture
Uncontrolled terms: Fuzzy C means method? - ?Gray scale? - ?Identification error rate? - ?Membership matrix? - ?Operational efficiencies? - ?Soil moisture retentions? - ?Soil pores? - ?Two-dimensional features
Classification code: 483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?723 Computer Software, Data Handling and Applications
Computer Software, Data Handling and Applications
? - ?723.5 Computer Applications
Computer Applications
? - ?903.1 Information Sources and Analysis
Information Sources and Analysis
? - ?913.1 Production Engineering
Production Engineering
? - ?921.1 Algebra
Algebra
? - ?961 Systems Science
Systems Science
DOI: 10.6041/j.issn.1000-1298.2018.03.033
Compendex references: YES
Database: Compendex
46. On-line Detection and Classification of Pork Moisture Based on Near-infrared Spectra
Accession number: 20182605370907
Authors: Peng, Yankun (1, 2); Yang, Qinghua (1, 2); Wang, Wenxiu (1, 2)
Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China; (2) National R&D Center for Agro-processing Equipment, Beijing; 100083, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 347-353
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to realize fast, nondestructive and real-time measurement of parameters (moisture) for pork on-line and divide pork into qualified and unqualified class according to GB/T 18394-2010 (pork moisture limit value ≤76.5%), an on-line detection and classification system was designed and developed based on near infrared reflectance spectra. To determine the detecting distance from the probe to the surface of the sample, optimizing platform was set up, which included spectrum acquisition unit, distance detection unit, light source unit, transmission unit and control unit. NIR spectra (349~1 761 nm) were obtained from 54 samples with different detecting distances in the range of 5~29 mm at approximately 2 mm intervals under static conditions. Moisture contents were determined by traditional methods and then related with the spectral information by partial least-squares (PLS) regression models with the first band (349~1 435 nm), the second band (1 037~1 761 nm) and double-band. The result showed that a detecting distance of 19 mm was the best to model. Based on optimal distance, spectra were obtained from 45 samples at static state and on-line by adjusting system of detection distance and multi points simultaneous detection, and then two PLS models were established. The optimal correlation coefficients of the model were 0.915 and 0.906, respectively. The two models results were almost the same. It verified the feasibility of predicting pork moisture on-line. In order to verify stability and precision of models for detecting online, NIR spectra were obtained from another 21 samples. The results showed that the NIR spectral range had an excellent ability to predict the content of moisture (R2=0.836 7) in pork online and classification accuracy was 90.48%. Results indicated that NIR spectroscopy was a promising technique to roughly predict moisture of intact fresh pork on-line. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Infrared devices
Controlled terms: Forecasting? - ?Least squares approximations? - ?Light sources? - ?Light transmission? - ?Meats? - ?Moisture? - ?Near infrared spectroscopy? - ?Nondestructive examination? - ?Regression analysis
Uncontrolled terms: Classification accuracy? - ?Detecting distance? - ?Near infra-red reflectances? - ?On-line detection? - ?Partial least-squares regression? - ?Pork? - ?Real time measurements? - ?Simultaneous detection
Classification code: 741.1 Light/Optics
Light/Optics
? - ?822.3 Food Products
Food Products
? - ?921.6 Numerical Methods
Numerical Methods
? - ?922.2 Mathematical Statistics
Mathematical Statistics
Numerical data indexing: Percentage 9.05e+01%, Size 1.04e-06m to 1.76e-06m, Size 1.90e-02m, Size 2.00e-03m, Size 3.49e-07m to 1.44e-06m, Size 3.49e-07m to 1.76e-06m, Size 5.00e-03m to 2.90e-02m
DOI: 10.6041/j.issn.1000-1298.2018.03.043
Compendex references: YES
Database: Compendex
47. Effect of Nitrogen Fertilizers Application on Variability of Quality of Paddy with Water-saving Irrigation
Accession number: 20182605370896
Authors: Zheng, Ennan (1, 2); Zhang, Zhongxue (1, 2); Yang, Hua (1, 2); Chen, Peng (1, 2)
Author affiliation: (1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin; 150030, China
Corresponding author: Zhang, Zhongxue(zhangzhongxue@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 271-278
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to discuss the effects of nitrogen fertilizers application on the variability of paddy quality in black soil region, the example of black soil of typical cold area was taken and treated with 0, 60 kg/hm2, 85 kg/hm2, 110 kg/hm2, 135 kg/hm2and 160 kg/hm2of nitrogen fertilizer under water saving irrigation condition. The field system sampling data for three main paddy quality indicators of protein, amylose and chalkiness in mature paddy were studied, the variability of three paddy quality indicators was investigated by using geostatistics theory, and a semi-variogram model was established. The results showed that the different nitrogen applications can not only promote paddy quality improvement, but also reduce paddy quality difference in the field area. Except that chalkiness and protein treated with no nitrogen fertilizer was the medium variation, all the other treatments were weak variation. In these three indicators, amylose was the most largest positive space correlation range, which was greater than the positive correlation of protein and chalkiness space. It was showed that the water and nitrogen management had the greatest influence on the variability of amylose in cold region. With the increase of nitrogen application rate, the nitrate nitrogen and ammonium nitrogen in soil were increased first and then decreased. The changes of nitrate and ammonium nitrogen contents in soils with different nitrogen application rates were in the opposite order to the spatial variation of paddy, which were in a descending trend as WS0, WS60, WS85, WS160, WS135 and WS110, it was showed that the different nitrogen contents had some influence on the variability of paddy quality, the results showed that the application of different nitrogen fertilizers could change the contents of nitrate and ammonium nitrogen in soil and then had a certain impact on the rice quality variability. The optimum nitrogen fertilizer application was 110 kg/hm2, and the three paddy quality indexes and its growth matrix had good regional characteristics and spatial structure. The introduction of geostatistics not only compensated the deficiency of classical statistical analysis, but also provided theoretical basis for spatial structure and quantitative research of water-fertilizer-soil-crop system information. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Nitrogen fertilizers
Controlled terms: Cyclodextrins? - ?Irrigation? - ?Nitrates? - ?Proteins? - ?Soils? - ?Water conservation
Uncontrolled terms: Black soil? - ?Fertilizer applications? - ?Nitrogen application rates? - ?Quantitative research? - ?Regional characteristics? - ?Variability? - ?Variable functions? - ?Water-saving irrigation
Classification code: 444 Water Resources
Water Resources
? - ?483.1 Soils and Soil Mechanics
Soils and Soil Mechanics
? - ?804 Chemical Products Generally
Chemical Products Generally
? - ?821.3 Agricultural Methods
Agricultural Methods
DOI: 10.6041/j.issn.1000-1298.2018.03.032
Compendex references: YES
Database: Compendex
48. Typical Structure Mining in 3D Model and Similarity Evaluation Based on Simulated Annealing Algorithm
Accession number: 20182605370821
Authors: Zhang, Kaixing (1); Hang, Shengyu (1); Wang, Jinxing (1); Song, Zhenghe (2); Liu, Xianxi (1, 3)
Author affiliation: (1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai’an; 271018, China; (2) College of Engineering, China Agricultural University, Beijing; 100083, China; (3) Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments, Tai’an; 271018, China
Corresponding author: Liu, Xianxi(wjbliu@sdau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 402-410
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: To realize 3D CAD model reuse requirement of multi-granularity, precise and intelligent in design field more efficiently, a method of typical structure mining in 3D CAD model and similarity evaluation based on simulated annealing algorithm was proposed. Firstly, attribute adjacent graph of CAD model was established through extracting topological and geometrical information from the 3D CAD model represented by B-rep, which can record face and edge detailed structures of 3D CAD model and its organization and association. Then, according to its description carrier, association graph and association graph matrix were established with the mapping relation of vertex and edge in attribute adjacency graph between typical structure and CAD model, and a mechanism of similarity estimation was proposed at the same time. At last, typical structure mining in 3D CAD model was accomplished based on simulated annealing algorithm through excavating maximal clique in association graph, while similarity estimation between typical structure and return model was accomplished. Using general model base, agricultural machine and equipment model base, algorithms testing and validating were completed compared with ant colony algorithm and genetic algorithm. Experimental results showed that the proposed method can realize typical structure mining in 3D CAD model and similarity estimation, which can effectively support design reuse of feature or local structure in 3D CAD models design domain. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Three dimensional computer graphics
Controlled terms: Agricultural machinery? - ?Ant colony optimization? - ?Computer aided design? - ?Genetic algorithms? - ?Simulated annealing? - ?Structural design? - ?Topology
Uncontrolled terms: 3D CAD Modeling? - ?Ant colony algorithms? - ?Design reuse? - ?Geometrical informations? - ?Similarity estimation? - ?Similarity evaluation? - ?Simulated annealing algorithms? - ?Typical structures
Classification code: 408.1 Structural Design, General
Structural Design, General
? - ?537.1 Heat Treatment Processes
Heat Treatment Processes
? - ?723.5 Computer Applications
Computer Applications
? - ?821.1 Agricultural Machinery and Equipment
Agricultural Machinery and Equipment
? - ?921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
Combinatorial Mathematics, Includes Graph Theory, Set Theory
? - ?921.5 Optimization Techniques
Optimization Techniques
DOI: 10.6041/j.issn.1000-1298.2018.03.051
Compendex references: YES
Database: Compendex
49. Numbers Estimating of Single Species Freshwater Fish Using Passive Acoustic Signals
Accession number: 20182605370904
Authors: Li, Lu (1, 2); Huang, Hanying (1, 2); Tu, Qunzi (1, 2); Zhao, Siming (3); Xiong, Shanbo (3); Ma, Zhangyu (1)
Author affiliation: (1) College of Engineering, Huazhong Agricultural University, Wuhan; 430070, China; (2) Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River, Ministry of Agriculture, Wuhan; 430070, China; (3) College of Food Science and Technology, Huazhong Agricultural University, Wuhan; 430070, China
Corresponding author: Huang, Hanying(hhywmx@mail.hzau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 328-333
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to estimate numbers of single species freshwater fish, the passive acoustic signals of different quantities crucian carp and bream fish were used as samples. The acoustic signals of the freshwater fish were collected by the HTI-96-MIN standard hydrophone. The extracting schemes of sample characteristics were compared by using 4~6 layer wavelet packet decomposition algorithms. The short-time average zero-crossing rate and the frequency band energy calculated by 6 layer wavelet packet decomposition algorithm were determined as the signal characteristics of crucian carp. And the characteristics of bream fish were the frequency band energy calculated by 6 layer wavelet packet decomposition algorithm only. According to the research results of different sample sets dividing methods, the final sample sets dividing methods of crucian carp and bream fish were Rank-SPXY (m=10) and Rank-SPXY (m=5). Furthermore, the key characteristics of the samples were chosen by competitive adaptive reweighted sampling. Finally, some numbers estimate models of the freshwater fish were established with the multiple linear regression and partial least squares regression. The results indicated that the performance of the multiple linear regression model was better. The multiple correlation coefficients of the numbers estimate models of crucian carp and bream fish were 0.835 and 0.893, and the relative percent deviations were 1.79 and 2.01, respectively. The numbers estimate methods proposed had good performance. It provided a new means for monitoring the freshwater fish quantity. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 22
Main heading: Fish
Controlled terms: Acoustic waves? - ?Least squares approximations? - ?Linear regression? - ?Regression analysis? - ?Water? - ?Wavelet analysis? - ?Wavelet decomposition
Uncontrolled terms: Freshwater fishes? - ?Multiple correlation coefficients? - ?Multiple linear regression models? - ?Multiple linear regressions? - ?Numbers estimate? - ?Partial least squares regression? - ?Passive acoustics? - ?Wavelet Packet Decomposition
Classification code: 751.1 Acoustic Waves
Acoustic Waves
? - ?921 Mathematics
Mathematics
? - ?922.2 Mathematical Statistics
Mathematical Statistics
DOI: 10.6041/j.issn.1000-1298.2018.03.040
Compendex references: YES
Database: Compendex
50. Rapid Discrimination of Peanut Varieties Using Terahertz Attenuated Total Reflection Spectroscopy
Accession number: 20182605370909
Authors: Liu, Cuiling (1, 2); Xing, Ruixin (1, 2); Wu, Jingzhu (1, 2); Sun, Xiaorong (1, 2); Hu, Ying (1, 2)
Author affiliation: (1) School of Computer and Information Engineering, Beijing Technology and Business University, Beijing; 100048, China; (2) Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing Technology and Business University, Beijing; 100048, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 361-366
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: Peanuts are rich in protein and lipids, which are widely cultivated in the north and south regions of China. As one of the main oil crops in China, the identification of peanut varieties is very important for breeding new varieties, improving oil production and processing quality. The commonly used detection methods such as experience identification, physical and chemical detection are all time-consuming and difficult to operate, could not meet the current rapid detection requirements well. So it is necessary to explore a rapid and efficient testing method for peanut varieties’ identification. Terahertz attenuated total reflection (THz-ATR) spectroscopy combined with distance matching algorithm (DM) were used to achieve the rapid identification of different varieties of peanut. A total of 60 peanut samples’ ATR spectrum in 0.3~3.6 THz which included three varieties of peanuts: Huayu 36, Luhua 1 and Luhua 9 were collected randomly. Then the first derivative of ATR absorption coefficients were normalized to establish DM model and identify different peanut varieties rapidly. The final DM model result showed that the overall recognition accuracy of the three categories can reach 93.3%, with only one sample was misclassified. The research results showed that using THz-ATR to rapid detection and identification of peanut varieties had certain feasibility, and the method can be applied to other crop variety rapid identification and quality analysis because of its simpleoperation and efficient characteristics. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Terahertz spectroscopy
Controlled terms: Chemical detection? - ?Crops? - ?Electromagnetic wave reflection? - ?Oilseeds? - ?Testing
Uncontrolled terms: Absorption co-efficient? - ?Attenuated total reflection spectroscopy? - ?Attenuated total reflections? - ?Distance match? - ?Peanut? - ?Rapid identification? - ?Recognition accuracy? - ?Variety discriminations
Classification code: 711 Electromagnetic Waves
Electromagnetic Waves
? - ?801 Chemistry
Chemistry
? - ?821.4 Agricultural Products
Agricultural Products
? - ?931.1 Mechanics
Mechanics
Numerical data indexing: Frequency 3.00e+11Hz to 3.60e+12Hz, Percentage 9.33e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.045
Compendex references: YES
Database: Compendex
51. Advances in UAV-based Multispectral Remote Sensing Applications
Accession number: 20182605370865
Authors: Sun, Gang (1); Huang, Wenjiang (1, 2); Chen, Pengfei (3); Gao, Shuai (1); Wang, Xiu (4)
Author affiliation: (1) State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing; 100101, China; (2) Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing; 100094, China; (3) State Key Laboratory of Resources and Environment Information System, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (4) Beijing Research Center of Intelligent Equipment for Agriculture, Beijing; 100097, China
Corresponding author: Huang, Wenjiang(huangwj@radi.ac.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 1-17
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: With the development of unmanned aerial vehicle (UAV) platforms and multispectral sensors, the application of multispectral remote sensing in light and small UAVs is becoming more and more extensive. Unmanned aerial vehicle remote sensing platforms equipped with different sensors have recently become an important approach for fast and non-destructive data acquisition and have the advantage of flexible and convenient operation, on-demand access to data and high spatial resolution. It has shown great potential in the fields of agriculture, forestry, ecology, environmental protection and so on. Firstly, this paper summarizes the main flight platform and the multispectral camera hardware technology. Secondly, the geometric and radiometric calibration of UAV multispectral image data processing technology are summarized. Thirdly, UAV multispectral remote sensing applications are systematically analyzed and summarized. Finally, some existing problems of the current UAV multispectral remote sensing system and the direction of development are proposed, in order to provide a reference to the related research. With the continuous progress of UAV based multispectral hardware technology, combined with the increasingly mature image processing and analysis software, the accuracy and ease of use of UAV multispectral remote sensing system will be improved. We suggest that practitioners from all sectors of the industry work closely with experts in remote sensing and computer science to develop and popularize multispectral remote sensing technology for unmanned aerial vehicles. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 117
Main heading: Remote sensing
Controlled terms: Antennas? - ?Calibration? - ?Cameras? - ?Computer hardware? - ?Data acquisition? - ?Data handling? - ?Forestry? - ?Hardware? - ?Image enhancement? - ?Radiometry ? - ?Unmanned aerial vehicles (UAV)
Uncontrolled terms: High spatial resolution? - ?Image processing and analysis? - ?Multi-spectral cameras? - ?Multi-spectral image data? - ?Multispectral remote sensing? - ?Radiometric calibrations? - ?Remote sensing platforms? - ?Vegetation index
Classification code: 605 Small Tools and Hardware
Small Tools and Hardware
? - ?652.1 Aircraft, General
Aircraft, General
? - ?722 Computer Systems and Equipment
Computer Systems and Equipment
? - ?723.2 Data Processing and Image Processing
Data Processing and Image Processing
? - ?742.2 Photographic Equipment
Photographic Equipment
? - ?944.8 Radiation Measurements
Radiation Measurements
DOI: 10.6041/j.issn.1000-1298.2018.03.001
Compendex references: YES
Database: Compendex
52. Design and Experiment of Portable Walnut High-altitude Pat-picking Machine
Accession number: 20182605370879
Authors: Cao, Chengmao (1); Zhan, Chao (1); Sun, Yan (1); Li, Zeze (1); Wu, Wentian (1); Ding, Ran (1)
Author affiliation: (1) College of Engineering, Anhui Agricultural University, Hefei; 230036, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 130-137
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: In order to solve the problem of high altitude picking difficulty, improve the picking efficiency and reduce the cost of picking, according to the test results of the separation of pecan fruit and tree branches, a portable pecan artificial high-altitude pat-picking device was designed. The key parts of the picking machine were mainly introduced, the establishment and calculation of the mathematical model were carried out for the mining mechanism, ADAMS was used to simulate for mining mechanism, the mechanism and working parameters of the mining mechanism were determined, which provided the basis for the design of picking machine, and the prototypes were made. Pecan picking experiment was carried out, the results indicated that the net rate of fruit picking had a significant effect at P=0.05, the net rate of fruit picking was increased gradually with the frequency of slapping, when slapping frequency peaked at 13.33 Hz, the net rate of fruit picking was 90.3%, which had less bud damage, but the faster the flapping frequency was, the more obvious the damage was to the bud, therefore, the average net rate would reach 85.1%~90.3% when flapping frequency was recommended to be 10~13.33 Hz, and no destructive damage to bud. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 20
Main heading: Fruits
Uncontrolled terms: Destructive damages? - ?Flapping frequency? - ?High altitude pat? - ?Picking efficiency? - ?Picking machines? - ?Portable type? - ?Walnut? - ?Working parameters
Classification code: 821.4 Agricultural Products
Agricultural Products
Numerical data indexing: Frequency 1.00e+01Hz to 1.33e+01Hz, Frequency 1.33e+01Hz, Percentage 9.03e+01%
DOI: 10.6041/j.issn.1000-1298.2018.03.015
Compendex references: YES
Database: Compendex
53. Sliding Mode Control for Intelligent Vehicle Trajectory Tracking Based on Reaching Law
Accession number: 20182605370912
Authors: Jiang, Libiao (1); Wu, Zhongwei (1)
Author affiliation: (1) School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou; 510640, China
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 49
Issue: 3
Issue date: March 25, 2018
Publication year: 2018
Pages: 381-386
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery
Abstract: The existing intelligent vehicle trajectory tracking controller have the problems such as low tracking accuracy and weak robustness. In order to solve these problems and improve track tracking effect, a sliding mode control method based on a new reaching law was proposed because the sliding mode control had the advantages of quick response and strong anti-interference ability. The new reaching law was the combination of a special function and a inverse hyperbolic sine, which made sure that the system state can approach the sliding surface quickly whether it was near the sliding surface or not. The law really avoided the shortcoming of the traditional algorithms and improved the approaching speed of the controlled system and limited the vibration. The controller that used this method can control the vehicle to track the reference trajectory quickly. In order to prove the effectiveness of this method, a vehicle kinematics model was built and the trajectory simulation experiment was carried out in Simulink to compare the control effect of the new reaching law with the double power reaching law. The results of the simulation verified that the new reaching law had higher approaching speed and weaker vibration and it had better control effect. Controlled by the sliding mode control method based on the new reaching law, the convergence speed of horizontal and vertical errors of the vehicle kinematics model was significantly increased, the vibration of course angle error became weak, and the vehicle kinematics model can track the trajectory faster. ? 2018, Chinese Society of Agricultural Machinery. All right reserved.
Number of references: 21
Main heading: Sliding mode control
Controlled terms: Controllers? - ?Hyperbolic functions? - ?Intelligent vehicle highway systems? - ?Inverse problems? - ?Kinematics? - ?Trajectories? - ?Vehicles? - ?Vibrations (mechanical)
Uncontrolled terms: Approaching speed? - ?Kinematics modeling? - ?Reaching law? - ?Reference trajectories? - ?Simulation? - ?Trajectory simulation? - ?Trajectory tracking? - ?Vehicle trajectories
Classification code: 406.1 Highway Systems
Highway Systems
? - ?731.1 Control Systems
Control Systems
? - ?732.1 Control Equipment
Control Equipment
? - ?921 Mathematics
Mathematics
? - ?931.1 Mechanics
Mechanics
DOI: 10.6041/j.issn.1000-1298.2018.03.048
Compendex references: YES
Database: Compendex
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