亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

1.  Accession number:20145200366239

  Title:Automatic irrigation method for greenhouse crops based on negative pressure decision-making 

  Authors:Zhang, Fang1, 2 ; Xue, Xuzhang2 ; Zhang, Jianfeng1 ; Guo, Wenzhong2 ; Wang, Lichun2 ; Chen, Fei2  

  Author affiliation:1  Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an, China

 2  National Research Center of Intelligent Equipment for Agriculture, Beijing, China 

  Corresponding author:Zhang, Jianfeng 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:148-154 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:At present, substrate cultivation has been widely used for planting a variety of fruits, vegetables and flowers. Since the invention of nutrient solution used in substrate culture techniques, the decision-making irrigation methods mainly adopted three ways in greenhouse, i.e. irrigation scheduling respective by time clock and radiation, and a way based on Penmen equation. But there were some defects above the three ways, the first two ways were not considered the demand for water of crops in different time in a day and growth period, leading to the supply more or less, and there were too many parameters to be determined in the last way. The negative pressure irrigation system could supply water for the plants timely and accurately according to the consumption by the plants themselves at any time of a day and the influence of different external environment, which only involved a parameter-consumption, and was easy to operate. An automatic decision-making method and system of irrigating nutrient solution in substrate culture in greenhouse based on negative pressure, which allowed us to decide the supply amount for most crops based on a small amount of crops consumption. This automated decision-making system ensured the plant roots in the balanced condition of water and nutrient (EC and pH value), which achieved a more efficient nutrient solution management in the substrate culture. This automated decision-making system adopted the consumed amount of nutrient solution in a line of plants in a certain time, in which line the negative pressure irrigation system was installed. The value obtained from consumed amount of plants of a line multiplying by a leaching-coefficient was used as supply volume for the other plants in substrate culture by drip irrigation system in the next time. The coefficient is related to the amount of drained nutrient solution. Commonly, 25%~30% of the applied nutrient solution should to be drained, which could prevent salt accumulation in the substrate. Moreover, the time and frequency for supply in other lines in one day was determined by the consumed amount of nutrient solution in a line. The consumed amount in a line was measured by flow sensor which was connected with the singlechip in a fixed time, then an order was given by the singlechip to control the work of the magnetic valve and collect the values from flow sensors in the other lines. At the same time, tomato plants in the substrate culture lines were irrigated nutrient solution by time clock as control test. Experimental results showed that the yield per plant of tomatoes that the automatic decision-making system based on negative pressure increased by 6.70% compared with the irrigation scheduling by time clock, while the consumption of nutrient solution decreased by 28.13%. It proved that the automatic decision-making system ran well and was able to supply the tomato plants nutrient solution timely and accurately according to the water requirement regularity of tomato plants per day. 

  Number of references:15 

  Main heading:Decision making 

  Controlled terms:Clocks  -  Crops  -  Fruits  -  Greenhouses  -  Irrigation  -  Nutrients  -  Scheduling  -  Substrates 

  Uncontrolled terms:Automatic irrigation  -  Decision-making systems  -  Drip irrigation systems  -  External environments  -  Irrigation devices  -  Irrigation scheduling  -  Time and frequencies  -  Tomato 

  Classification code:461 Bioengineering and Biology  -  461.9 Biology  -  801 Chemistry  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  912.2 Management  -  943.3 Special Purpose Instruments 

  DOI:10.6041/j.issn.1000-1298.2014.S0.024 

  Database:Compendex

 

2.  Accession number:20145200366257

  Title:Design and experiment of vegetable grafting robot operated by one-person for cucurbitaceous seedlings cultivated in humus pots 

  Authors:Chu, Jia1 ; Zhang, Tiezhong1   

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Zhang, Tiezhong 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:259-264 and 295 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:To improve the grafting rate and automation of grafting robot used currently in seedling production, a high-efficiency vegetable grafting robot operated by one-person for cucurbitaceous seedlings cultivated in humus pots was designed based on splice grafting method. The machine consisted of six units, i.e., a scion gripping and transporting unit, a scion straight-cutting unit, a stock gripping and transporting unit, a stock rolling-cutting unit, a clip auto-arranging and sending unit and a grafted-seeding bowl auto-arranging unit. Experiments were conducted in laboratory and field. Results showed that the success rate of grafting was 92% and the practical grafting rate was 285 plants per hour (with the theoretical grafting rate of 440 plants per hour). Under the same success rate of grafting, the grafting rate of this machine was 36% higher than the grafting machine for cucurbitaceous seedlings cultivated in humus pots operated by two persons. 

  Number of references:13 

  Main heading:Grafting (chemical) 

  Controlled terms:Experiments  -  Machine design  -  Robots  -  Seed  -  Soils  -  Vegetables 

  Uncontrolled terms:Cucurbitaceous  -  Cutting units  -  Grafting rate  -  Grafting robots  -  High-efficiency  -  One-person operation  -  Seedling production  -  Splice grafting 

  Classification code:483.1 Soils and Soil Mechanics  -  601 Mechanical Design  -  731.5 Robotics  -  815.1 Polymeric Materials  -  821.4 Agricultural Products  -  901.3 Engineering Research 

  DOI:10.6041/j.issn.1000-1298.2014.S0.042 

  Database:Compendex

 

3. Accession number:20145200366264

  Title:Design and experiment of 1KY-40 hydraulic drive ditcher for farmland conduit 

  Authors:Wu, Guangwei1 ; Fu, Weiqiang1 ; Dong, Jianjun1 ; Cong, Yue1 ; Meng, Zhijun1   

  Author affiliation:1  Beijing Research Center of Intelligent Equipment for Agriculture, Beijing, China 

  Corresponding author:Meng, Zhijun 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:302-308 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:The construction of farmland conduit is a major part of irrigation facilities. Most farmland conduit is built by human and general excavator in China, the shape of conduit is not standard and the surface is very coarse. It is a main reason that a lot of water was wasted in the transportation process, so improving the quality of conduit construction has a significant role in achieving the target of agricultural water conservation. According to the status of special equipment for farmland conduit construction is exile, 1KY-40 hydraulic drive ditcher for farmland conduit was researched and designed in order to meet the needs of high-quality farmland conduit construction. The ditcher is a tractive structure and its operating principle is that the symmetrical cutter is driven by an independent hydraulic power system so as to cut soil, the cutter can cut and throwing soil, the ditcher is dragged by tractor and the conduit with trapezoidal section can be excavated. The GPS automatic navigation system was integrated in the tractor, which can improve the trenching operations to improve linear precision of ditching. The test showed that the ditching depth of the ditcher was 407 mm, the operating speed can be up to 0.12 m/s, the stability of the ditching depth was 97.1%, the top width of conduit was 984 mm and bottom width was 305 mm, the linear deviation of ditching was less than 90 mm when soil water content was 15.8% and soil compactbility was 0.31 MPa under the condition of using the GPS automatic navigation system. The application experiments of 1KY-40 hydraulic drive ditcher for farmland were completed in Beijing, Jiangsu and Heilongjiang of China. The experimental results indicate that it can meet the construction of trapezoidal section conduit under the local soil conditions. 

  Number of references:6 

  Main heading:Farms 

  Controlled terms:Construction equipment  -  Design  -  Experiments  -  Global positioning system  -  Hydraulic drives  -  Navigation systems  -  Soil moisture  -  Tractors (truck)  -  Water conservation 

  Uncontrolled terms:Agricultural water  -  Automatic navigation systems  -  Ditcher  -  Farmland conduit  -  Hydraulic power systems  -  Operating principles  -  Soil water content  -  Transportation process 

  Classification code:405.1 Construction Equipment  -  408 Structural Design  -  434.4 Waterway Navigation  -  444 Water Resources  -  483.1 Soils and Soil Mechanics  -  632.2 Hydraulic Equipment and Machinery  -  663.1 Heavy Duty Motor Vehicles  -  716.3 Radio Systems and Equipment  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  901.3 Engineering Research 

  DOI:10.6041/j.issn.1000-1298.2014.S0.049 

  Database:Compendex

 

4. Accession number:20145200366232

  Title:Design and experiment of wheat straw cutting reciprocating test bench 

  Authors:Hou, Jialin1 ; Jiang, Tao1 ; Wu, Yanqiang1 ; Liu, Lin1 ; L, Zhaoqin1 ; Yang, Qiyong1   

  Author affiliation:1  Mechanical and Electronic Engineering College, Shandong Agricultural University, Taian, China 

  Corresponding author:Yang, Qiyong 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:101-106 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to analyze the cutting performance of wheat straw, reciprocating cutting test bench for simulating the cutting process of wheat straw in laboratory was designed. The designed test bench was composed of body frame, chopped header, crank connecting link, AC motor and etc. The forward speed was 0~1.8 m/s, cutting speed was 0~1.6 m/s, cutting angle was 0~30°, and adjustable blade gap was in the range of 0.8~3 mm. The paper mainly focused on the working performance of test bench and cutting performance for wheat straw. Orthogonal test with four factors and four levels and single factor test was carried out. The results showed that: with the range R, the order of factors affected the cutting performance could be determined as: cutting position, cutting speed, blade gap and cutting angle. With a given experimental factors and levels, the optimum combination of parameters were: cutting speed of 1.4 m/s, cutting angle of 20°, blade gap of 1mm and cutting position of the third section of wheat straw. 

  Number of references:14 

  Main heading:Testing 

  Controlled terms:AC motors  -  Cutting  -  Cutting tools  -  Straw 

  Uncontrolled terms:Cutting performance  -  Cutting positions  -  Experimental factors  -  Optimum combination  -  Reciprocating  -  Test benches  -  Wheat straws  -  Working performance 

  Classification code:423.2 Non Mechanical Properties of Building Materials: Test Methods  -  604.1 Metal Cutting  -  605 Small Tools and Hardware  -  705.3.1 AC Motors  -  821.5 Agricultural Wastes 

  DOI:10.6041/j.issn.1000-1298.2014.S0.017 

  Database:Compendex

 

5. Accession number:20145200366263

  Title:Intelligent facilities fishpond design of breeding Schizothorax prenanti 

  Authors:Zou, Zhiyong1 ; Xu, Lijia1 ; Kang, Zhiliang1 ; Zhou, Man1 ; Chen, Xiaoyan1  

  Author affiliation:1  College of Mechanical and Electronic, Sichuan Agricultural University, Yaan, China 

  Corresponding author:Xu, Lijia 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:296-301 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to simulate the natural growing environment of Schizothorax prenanti as well as come up with an intelligent facilities fishpond design, the fishponds achieved micro flow effect and intelligent monitoring of water quality parameters by taking use of concrete structure, combined with water pipe, water pump, solenoid valve, water quality parameters detection sensor and ZigBee network. Based on 32 bit embedded MCU and WinCE 6.0 embedded operating system, PDA form gateway nodes were designed. By transplanting embedded SQlite database on gateway nodes, ZigBee network site management was achieved. Control instruction was obtained through analyzing data with fuzzy neural network method, and then closed-loop control was achieved. Further experimental tests showed that average packets loss rate of ZigBee network was 0.52%, micro flow deviation was within the range of ±1.8 cm/s, temperature deviation was within the range of ±0.5, dissolved oxygen deviation was within the range of ±0.4 mg/L, pH value deviation was within the range of ±0.3. The water quality parameters completely meet the requirements of Schizothorax prenanti breeding environment; therefore network monitoring could be applied to breeding factories with different scales. 

  Number of references:12 

  Main heading:Gateways (computer networks) 

  Controlled terms:Biochemical oxygen demand  -  Dissolved oxygen  -  Fish ponds  -  Fuzzy neural networks  -  Sensors  -  Solenoid valves  -  Water pipelines  -  Water quality  -  Zigbee 

  Uncontrolled terms:Breeding environments  -  Embedded operating systems  -  Gateway nodes  -  Intelligent monitoring  -  Schizothorax prenanti  -  Temperature deviation  -  Water quality parameters  -  ZigBee networks 

  Classification code:444 Water Resources  -  445 Water Treatment  -  445.2 Water Analysis  -  453 Water Pollution  -  453.2 Water Pollution Control  -  619 Pipes, Tanks and Accessories; Plant Engineering Generally  -  619.1 Pipe, Piping and Pipelines  -  716 Telecommunication; Radar, Radio and Television  -  717 Optical Communication  -  718 Telephone Systems and Related Technologies; Line Communications  -  722.3 Data Communication, Equipment and Techniques  -  723 Computer Software, Data Handling and Applications  -  723.4 Artificial Intelligence  -  801 Chemistry  -  821.3 Agricultural Methods 

  DOI:10.6041/j.issn.1000-1298.2014.S0.048 

  Database:Compendex

 

6. Accession number:20145200366226

  Title:Crank-rocker mechanism for collecting plastic film 

  Authors:Li, Gang1 ; Zhang, Linhai1, 2 ; Fu, Yu1 ; Xue, Dangqin1, 2 ; Hou, Shulin1   

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China

 2  College of Mechanical and Automotive Engineering, Nanyang Institute of Technology, Nanyang, China 

  Corresponding author:Hou, Shulin 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:63-67 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Unstable operation performance of mechanism for collecting plastic film results in low rate of collecting used plastic film. A crank-rocker mechanism for collecting plastic film was presented. The geometry and mathematic models of the proposed machine were built for simulating, analyzing and optimizing the work mechanism, then the working requirement for picking-up and removing the used plastic film was met. Field experiment showed that, the working efficiency of machine was higher than 0.4 hm2/h, and the rate of collecting used plastic film was 88.5%. Basically, no operation wound problems were found during the whole experiment. 

  Number of references:15 

  Main heading:Collector efficiency 

  Controlled terms:Experiments  -  Mechanisms  -  Plastic films 

  Uncontrolled terms:Crank rocker  -  Crank-rocker mechanism  -  Field experiment  -  Low rates  -  Mathematic model  -  Operation performance  -  Work mechanism  -  Working efficiency 

  Classification code:601.3 Mechanisms  -  702.3 Solar Cells  -  817.1 Polymer Products  -  901.3 Engineering Research 

  DOI:10.6041/j.issn.1000-1298.2014.S0.011 

  Database:Compendex

 

7. Accession number:20145200366250

  Title:Electrochemical behavior of rutin on graphene and ionic liquids composite film modified electrode 

  Authors:Wang, Hui1, 2 ; Wang, Zhiqiang3 ; Liu, Gang1, 2 ; Zhang, Zhihao1, 2  

  Author affiliation:1  Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing, China

 2  Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing, China

 3  College of Computer Science and Technology, Shandong University of Technology, Zibo, China 

  Corresponding author:Liu, Gang 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:219-224 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:An electrode for the detection of rutin in tea and pill was produced and fabricated, which was modified by the glass carbon electrode (GCE) surface by graphene (GR) nanometer materials and n-octylpyridinum hexafluorophosphate (OPFP). Different electrochemical methods such as cyclic vohammetry, impedance spectroscopy and square wave voltammetry were used to investigate the electrochemical behaviors of rutin on IL/GR/GCE, indicating that greatly improved the electrochemical performance and detection response due to ionic conductivity and adhesiveness of room temperature and the large specific surface area and high electron transfer of graphene. Under the optimal conditions using square wave voltammetry, the rutin oxidative peak current was linearly related to its concentration in the range from 0.05 μmol/L to 11 μmol/L with the detection limit estimated to 0.01 μmol/L(S/N=3) and the linear regression coefficient was 0.997. Finally, the developed electrode was successfully applied to detect the content of rutin in real samples, which displays good stability and excellent anti-interference ability. 

  Number of references:23 

  Main heading:Ionic liquids 

  Controlled terms:Alcohols  -  Chemical detection  -  Composite films  -  Drug products  -  Electrochemical electrodes  -  Electrochemical impedance spectroscopy  -  Electrochemistry  -  Graphene  -  Voltammetry 

  Uncontrolled terms:Electrochemical behaviors  -  ELectrochemical methods  -  Electrochemical performance  -  Glass carbon electrodes  -  Large specific surface areas  -  Linear regression coefficients  -  Rutin  -  Square wave voltammetry 

  Classification code:714.2 Semiconductor Devices and Integrated Circuits  -  801 Chemistry  -  801.4.1 Electrochemistry  -  804 Chemical Products Generally  -  804.1 Organic Compounds 

  DOI:10.6041/j.issn.1000-1298.2014.S0.035 

  Database:Compendex

 

8. Accession number:20145200366246

  Title:Quantitative characterization of rape straw combustion and gas emissions using TG/DSC-FTIR-MS technology 

  Authors:Ma, Qiulin1 ; Han, Lujia1 ; Huang, Guangqun1   

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Huang, Guangqun 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:196-201 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:This paper took rape straw as the research object. Based on the TG/DSC-FTIR-MS technology, the dynamic characteristics of combustion were studied systematically with different air flow rates and sample particle sizes. And the qualitative and quantitative characterization analysis of main gas emissions was conducted. The results showed that there was no significant difference on combustion characteristics under different factor-levels. During each burning process, most gas escaped, including a larger amount of CO2 and a smaller amount of alkane gases such as NOx, SO2 and HCl with a diminishing magnitude. Also intensity curves of gases released corresponded to the characteristics of thermal weight loss rate. Quantitative study on the dynamic characteristics of combustion and gas emissions using TG/DSC-FTIR-MS technology could provide basic data and methodological support for the rape straw as environmentally friendly renewable energy. 

  Number of references:12 

  Main heading:Gas emissions 

  Controlled terms:Carbon dioxide  -  Combustion  -  Sulfur dioxide 

  Uncontrolled terms:Burning process  -  Combustion characteristics  -  Dynamic characteristics  -  Quantitative characterization  -  Quantitative study  -  Rape straws  -  Renewable energies  -  Thermal weight loss 

  Classification code:451.1 Air Pollution Sources  -  521.1 Fuel Combustion  -  804.2 Inorganic Compounds 

  DOI:10.6041/j.issn.1000-1298.2014.S0.031 

  Database:Compendex

 

9. Accession number:20145200366245

  Title:Influences of tillage methods on carbon dioxide and methane fluxes from winter wheat fields in Beijing's suburb 

  Authors:Zheng, Zhiqi1 ; Wang, Shudong1 ; He, Jin1 ; Wang, Qingjie1 ; Li, Hongwen1 ; Zhang, Xiangcai1  

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:He, Jin 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:189-195 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:To determine the variation of tillage on carbon dioxide (CO2) and methane (CH4) fluxes from winter wheat fields in Beijing's suburb, different tillage methods were experimented in Qingyundian Town, Daxing District, Beijing. CO2, CH4 fluxes were measured using static chamber-gas chromatographic techniques during two seasons of winter wheat (October 2011-July 2012 and October 2012-July 2013). The experimental results of the four tillage methods, i.e., no tillage (NT), subsoiling tillage (ST), rotary tillage (RT) and conventional tillage (CT) showed that soils with winter wheat were the emission sources of atmospheric CO2, and the sink of atmospheric CH4 during crop growth seasons. Daily and seasonal variation of CO2 and CH4 fluxes changed significantly for NT, ST, RT and CT treatments, respectively. The maximal daily emission flux of CO2 appeared at 0:00 am, and the minimum emission appeared at 10:00 am. The maximal seasonal emission flux of CO2 appeared at seedling and maturing stages of winter wheat and the minimum emission appeared at winter dormancy stage. Daily and seasonal variation of CH4 fluxes under four tillage treatments showed a significant difference, but no significant variety regulation. The seasonal CO2 flux positively correlated with soil temperature in 0~20 cm soil layer, while negative correlation was found between the CO2 emission and soil moisture in 0~30 cm soil layer. The seasonal CH4 flux positively correlated with soil temperature in 0~20 cm soil layer. In winter wheat fields, the seasonal mean CO2 emission flux demonstrated as CT>RT>ST>NT, and the seasonal mean CH4 absorption flux demonstrated as RT>CT>NT>ST. Compared with RT and CT, NT decreased soil CO2 emission flux by 23.3%~27.1%, and increased soil CH4 absorption flux by over 20%. Generally, all the four treatments (NT, ST, RT and CT) enhanced CH4 assimilation at different levels, and no tillage would be a better tillage practice to reduce CO2 emission for winter wheat fields in Beijing's suburb. 

  Number of references:18 

  Main heading:Carbon dioxide 

  Controlled terms:Agricultural machinery  -  Carbon  -  Crops  -  Cultivation  -  Fluxes  -  Gas chromatography  -  Methane  -  Soil moisture  -  Temperature 

  Uncontrolled terms:Beijing's suburb  -  CH4  -  Chromatographic techniques  -  Conventional tillage  -  Negative correlation  -  Seasonal variation  -  Tillage methods  -  Wheat 

  Classification code:483.1 Soils and Soil Mechanics  -  522 Gas Fuels  -  641.1 Thermodynamics  -  801 Chemistry  -  804 Chemical Products Generally  -  804.2 Inorganic Compounds  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control 

  DOI:10.6041/j.issn.1000-1298.2014.S0.030 

  Database:Compendex

 

10. Accession number:20145200366223

  Title:Design for metering device key parts of pneumatic grass seeder 

  Authors:Zhai, Gaixia1 ; Bao, Desheng1 ; Wang, Zhijun1 ; Yang, Li1 ; Wang, Zhenhua1 ; Li, Fengming1  

  Author affiliation:1  Huhhot Branch, Chinese Academy of Agricultural Mechanization Sciences, Huhhot, China 

  Corresponding author:Zhai, Gaixia 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:47-51 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Based on the mechanical and physical properties study of forage grass seeds, a multi-line with one-device type metering device was designed. It was composed of adjustable screw, stirrer, metering device housing and central metering sheave and so on. The sowing rate can be set by turning the screw to change working length of central metering sheave relative to metering device housing. The stirrer inside of the sheave housing was used to prevent seeds overhead. And metering of different sizes of seed was adjusted by changing the position of internal components of slot wheel mechanism. Innovative design on structure of the central metering sheave was finished. According to the structure parameters and physical characteristic parameters, different seed sowing rate of per hectares was calculated. And then the working length scale of the central metering groove wheel was made. And there was a one-to-one correspondence between scale values and sowing quantity per hectare of different kinds of seed. 

  Number of references:10 

  Main heading:Housing 

  Controlled terms:Design  -  Screws  -  Wheels 

  Uncontrolled terms:Central metering sheave  -  Innovative design  -  Mechanical and physical properties  -  Metering devices  -  Physical characteristics  -  Seeder  -  Sheave housings  -  Structure parameter 

  Classification code:403.1 Urban Planning and Development  -  408 Structural Design  -  601.2 Machine Components  -  605 Small Tools and Hardware 

  DOI:10.6041/j.issn.1000-1298.2014.S0.008 

  Database:Compendex

 

11. Accession number:20145200366221

  Title:Flow field simulation and working parameters analysis of side positive pressure maize seeding device 

  Authors:Yang, Shandong1, 2 ; Zhang, Dongxing1 ; Gao, Zhenqiang2 ; Liu, Xiaoqian2  

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China

 2  School of Agricultural and Food Engineering, Shandong University of Technology, Zibo, China 

  Corresponding author:Zhang, Dongxing 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:35-39 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to study working parameters' effect on flow field distribution in side positive pressure seeding device, LES (large eddy simulation) of Fluent software was used to analyze positive pressure flow field in seed-metering device. Simulation analysis and contrast experiment for positive pressure flow field were performed under different working parameters. Results showed that pressure field changed slightly in seeding device with increase of plate rotation speed when inlet pressure was set. According to velocity field, performance of seed metering was poor due to higher plate rotation speed. When plate rotation speed was set, pressure variation had non-significant effect on seeding performance. According to seeding experiment results, seeding qualified index reached 91.30% when inlet pressure was 1.2 kPa and plate rotation speed was 16 r/min. Rotation speed of seed-metering plate was the significant affecting factor of seed-metering performance. 

  Number of references:16 

  Main heading:Pressure effects 

  Controlled terms:Computer software  -  Experiments  -  Flow fields  -  Large eddy simulation  -  Rotation  -  Velocity 

  Uncontrolled terms:Contrast experiment  -  Flow field simulation  -  Maize seeding device  -  Positive pressure  -  Pressure variations  -  Seed-metering device  -  Simulation analysis  -  Working parameters 

  Classification code:631 Fluid Flow  -  631.1 Fluid Flow, General  -  723 Computer Software, Data Handling and Applications  -  901.3 Engineering Research  -  921 Mathematics  -  931.1 Mechanics 

  DOI:10.6041/j.issn.1000-1298.2014.S0.006 

  Database:Compendex

 

12. Accession number:20145200366235

  Title:Design and test of alfalfa flattening test bench 

  Authors:Zhao, Jianzhu1 ; Guo, Hailin1 ; Wang, Fengchen1 ; Zhang, Xiaoqing1 ; Wang, Yiru1 ; Huang, Shaojiong1   

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Huang, Shaojiong 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:119-123 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:To acquire better flattening performance of the alfalfa cutting and flattening machine, a kind of test bench was proposed. According to alfalfa flattening impact factors, including flattening gap and velocity, alfalfa growth, machine walking velocity and so on, the flattening device, drive system and data acquisition system have been designed. The multi-factors orthogonal test for alfalfa flattening was executed by changing the flattening roll gap, flattening roll rotational speed and feeding rate on test bench. The results of validity test showed that the pressure values between flattening rolls showed a regular change, and the most significant impact factor of the nutrient content of alfalfa is the spreading quantity, followed by the roll gap, feeding rate and roll rotational speed. This alfalfa flattening test bench can simulate the actual operation effectively, and provide the guidance of alfalfa cutting and flattening machine design. 

  Number of references:11 

  Main heading:Data acquisition 

  Controlled terms:Digital storage  -  Machine design 

  Uncontrolled terms:Alfalfa  -  Data acquisition system  -  Design and tests  -  Impact factor  -  Nutrient contents  -  Rotational speed  -  Test benches  -  Walking velocity 

  Classification code:601 Mechanical Design  -  722.1 Data Storage, Equipment and Techniques  -  723.2 Data Processing and Image Processing 

  DOI:10.6041/j.issn.1000-1298.2014.S0.020 

  Database:Compendex

 

13. Accession number:20145200366249

  Title:Research of MPPT control based on LS-SVM 

  Authors:Cai, Jihe1 ; Sun, Yukun2 ; Li, Bei1 ; Xu, Yan1  

  Author affiliation:1  School of Electrical and Electrical Engineering, Changzhou Institute of Technology, Changzhou, China

 2  School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, China 

  Corresponding author:Cai, Jihe 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:213-218 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to solve the low control accuracy and tracking error in the maximum power point tracing (MPPT) control in traditional photovoltaic, which was easily occurred under the natural dramatically changing environment, the paper presented a voltage predicting model based on least squares support vector machine (LS-SVM) for the prediction of the voltage of the maximum power output in the PV system, through which the maximum operating point voltage could be predicted, then the reference voltage of constant voltage control method could be modified and MPPT control of the PV system could be eventually realized. Simulation results showed that the model had higher accuracy in prediction, the relative error was less than 0.04, and the modified control method could guarantee maximum power tracking of the PV system quickly and stably, avoided the phenomenon of tracking error. 

  Number of references:11 

  Main heading:Support vector machines 

  Controlled terms:Computer simulation  -  Forecasting  -  Least squares approximations  -  Photovoltaic cells  -  Solar energy 

  Uncontrolled terms:Changing environment  -  Constant voltage control  -  Least squares support vector machines  -  Maximum power output  -  Maximum power point tracing  -  Maximum Power Point Tracking  -  Maximum power tracking  -  Photovoltaic power generation 

  Classification code:615.2 Solar Power  -  723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications  -  741.3 Optical Devices and Systems  -  921 Mathematics  -  921.6 Numerical Methods 

  DOI:10.6041/j.issn.1000-1298.2014.S0.034 

  Database:Compendex

 

14.  Accession number:20145200366248

  Title:Preparation of xylooligosaccharides producing solid waste based biodegradable seedling pots 

  Authors:Li, Daoyi1 ; Wang, Xiaoyan1 ; Jing, Quanrong1 ; Si, Weiwei1 ; Li, Jin1 ; Li, Shujun1   

  Author affiliation:1  Chinese Academy of Agricultural Mechanization Sciences, Beijing, China 

  Corresponding author:Li, Shujun 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:207-212 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Xylooligosaccharides producing solid waste (XPSW) was the main solid waste of xylooligosaccharides producing from corn cobs. To utilize that biorefinery waste, biodegradable seeding pots were prepared using XPSW as main ingredient through dry thermo-compression molding method. The most economical formula of raw powders for XPSW based seeding pots was screened out as XPSWwheat branadhesiverelease agent=68266.31 by weight. Also the molding parameters were optimized by orthogonal test, and the optimal compression temperature, compression pressure and holding time was 180, 180 MPa and 4.5 s, respectively. Under those conditions, the dry compress strength of XPSW based seeding pots was 2251 N, and wet compress strength was 417 N. Compare to corn cobs, higher lignin content and lower hemicellulose content of XPSW made the XPSW based seedling pots had better mechanical strength and lower water absorption. Fungal-growth test showed that the XPSW based seedling pots had good biodegradability. 

  Number of references:11 

  Main heading:Compression molding 

  Controlled terms:Biodegradation  -  Flip chip devices  -  Solid wastes  -  Water absorption 

  Uncontrolled terms:Biodegradable seedling pots  -  Compress strength  -  Compression pressures  -  Lignin contents  -  Molding parameters  -  Optimal compression  -  Orthogonal test  -  Xylooligosaccharides 

  Classification code:714.2 Semiconductor Devices and Integrated Circuits  -  801.2 Biochemistry  -  802.3 Chemical Operations  -  811 Cellulose, Paper and Wood Products  -  816.1 Processing of Plastics and Other Polymers 

  DOI:10.6041/j.issn.1000-1298.2014.S0.033 

  Database:Compendex

 

15.  Accession number:20145200366240

  Title:Modeling of influences on ISE-based soil slurry measurement using response surface method 

  Authors:Pu, Pan1, 2 ; Zhang, Miao1 ; Zhang, Li'nan1 ; Ren, Haiyan1 ; Kong, Pan1  

  Author affiliation:1  Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing, China

 2  College of Information Engineering, Northwest A&F University, Yangling; Shannxi, China 

  Corresponding author:Zhang, Miao 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:155-161 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Soil pretreatment parameters play significant impacts on the accuracy of ion-selective electrode (ISE) in direct soil slurry detection. In this paper, the average relative error (R?E) was used to evaluate the influences of three main pretreatment factors, including mesh size, shaking time, and settling time. First, the range of three factors was determined based on the single factor experiment. And then, a 3-level, 3-factor Box-Behnken experimental design was conducted to investigate their effects. The relationship between R?E and three factors was quantitatively described by a multivariate quadratic model through the response surface method. The results showed that settling time was the most influencing one among three tested factors. Mesh size was less significant than shaking time. Coupling settling time and mesh size, the optimal pretreatment parameters were obtained to minimize the detection error, the mesh size was 2 mm, settling time was 1.4 h, and shaking time was chosen to be 22 min. Under the optimized parameters, the R?E of the validation soil group were all less than 7.5%, which indicated the prediction accuracy, and the predicted results had a high fitting degree with the measurements. In all, the model was promising for accuracy prediction and analysis in the ISE-based soil slurry measurement. 

  Number of references:20 

  Main heading:Ion selective electrodes 

  Controlled terms:Electrodes  -  Soil surveys  -  Soils  -  Surface properties 

  Uncontrolled terms:Average relative error  -  Box-Behnken experimental design  -  Multivariate quadratics  -  Pre-Treatment  -  Response surface  -  Response surface method  -  Single-factor experiments  -  Soil slurry 

  Classification code:483.1 Soils and Soil Mechanics  -  704.1 Electric Components  -  802.1 Chemical Plants and Equipment  -  951 Materials Science 

  DOI:10.6041/j.issn.1000-1298.2014.S0.025 

  Database:Compendex

 

16.  Accession number:20145200366256

  Title:An efficient strawberry harvesting end-effector with large misalignment tolerance 

  Authors:Wang, Liangju1 ; Zhang, Tiezhong1 ; Chu, Jia1 ; Yang, Li1 ; Zhang, Jie1 ; Duan, Yunhong2  

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China

 2  Department of Agricultural Machinery, Beijing Prominion Publishing Ltd., Beijing, China 

  Corresponding author:Zhang, Tiezhong 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:252-258 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:For strawberry harvesting, when strawberries are overlapping or covered by leaves, high positional accuracy of end-effector is required and the recognition and detection algorithm is very complex and time-consuming, otherwise the strawberries will be abandoned. To solve the problem mentioned above, a large misalignment tolerance end-effector, which can be used for picking up multi-strawberries at one time, was designed. The end-effector, using the harvesting method of collecting strawberries down to up and away from obstacle, clamping and cutting stems, was composed of a collecting-clamping-cutting device and profiling ridge device. The end-effector was mounted on harvesting manipulators. Experiments were conducted and results showed that the proposed end-effector had satisfactory performance when positional error in the range of ±7 mm, and could pick up three ripe strawberries at one time without separating overlapped ripe strawberries; while fruits area containing single fruit, two fruits, or three fruits, the average time of picking one time respectively was 2.00 s, 2.13 s, 2.28 s, and the success ratio of harvesting was no less than 97.7%. 

  Number of references:15 

  Main heading:End effectors 

  Controlled terms:Alignment  -  Fruits  -  Harvesting 

  Uncontrolled terms:Detection algorithm  -  Harvesting methods  -  Harvesting robot  -  Picking up  -  Positional accuracy  -  Positional errors  -  Strawberry  -  Success ratio 

  Classification code:601.1 Mechanical Devices  -  731.5 Robotics  -  821.3 Agricultural Methods  -  821.4 Agricultural Products 

  DOI:10.6041/j.issn.1000-1298.2014.S0.041 

  Database:Compendex

 

17.  Accession number:20145200366231

  Title:Design and experiment of 4SY-1.8 rape walking windrower 

  Authors:Liao, Yitao1 ; Chen, Chuanjie1 ; Shu, Caixia1 ; Tian, Boping1 ; Liao, Qingxi1   

  Author affiliation:1  College of Engineering, Huazhong Agricultural University, Wuhan, China 

  Corresponding author:Liao, Qingxi 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:94-100 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to take advantage of the characteristics of growth and maturity of rape, overcome the disadvantage of high loss ratio and power consumptive of rape combine harvester, 4SY-1.8 type rape windrower was investigated. The novel windrower was designed for matching to walking tractor to meet both agro-mechanization and rape planting actuality in southern China. The design and construction characteristics of cutting, dividing, laying and hitching unit and considerations in the migration of rape stalks were analyzed. The results of field experiment showed that the windrower could complete the work of middle dividing and laying on both sides efficiently. The mean laying angle of rape stalk was 36.4°, which was less than 45°with 75.8% probability. The mean width of the piled stalk was 1072.6 mm, which was less than 1150 mm with 81.1% probability. The mean of stubble height was 278.2 mm, which was between 230 mm and 330 mm with 85.2% probability. The test results indicated that it had a rational design and reliable function and its working quality can be easily met the agricultural requirement. 

  Number of references:14 

  Main heading:Design 

  Controlled terms:Combines  -  Experiments  -  Harvesters  -  Machinery  -  Probability  -  Rational functions 

  Uncontrolled terms:Design and construction  -  Field experiment  -  Laying  -  Rape windrower  -  Rational design  -  Reliable function  -  Walk-behind  -  Working quality 

  Classification code:408 Structural Design  -  601 Mechanical Design  -  821.1 Agricultural Machinery and Equipment  -  901.3 Engineering Research  -  921 Mathematics  -  922.1 Probability Theory 

  DOI:10.6041/j.issn.1000-1298.2014.S0.016 

  Database:Compendex

 

18. Accession number:20145200366230

  Title:Design and experiment of film removing and peanut picking device for half-feeding harvester 

  Authors:Xu, Jikang1 ; Yang, Ranbing1 ; Li, Ruichuan1 ; Shang, Shuqi1  

  Author affiliation:1  College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao, China 

  Corresponding author:Yang, Ranbing 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:88-93 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:For the problem of the picking roller of present half-feeding peanut harvester was easily wrapped in plastic membrane, a kind of peanut removing device used spiral knife was designed. The structure optimization and experiment analysis were also carried out. The helical blade was modeled based on UG software. The best arrangement of the blade was confirmed by stress nephogram. Through the analysis of experimental data and processing, the best structure and operating parameters of the proposed device were got: the clearance was 5.3 mm, speed of picking roller was 326 r/min, and arranging blade angle was 43°. After optimizing, the breaking membrane rate value reached to 95.66%. 

  Number of references:14 

  Main heading:Oilseeds 

  Controlled terms:Data handling  -  Experiments  -  Feeding  -  Harvesters  -  Rollers (machine components)  -  Structural optimization 

  Uncontrolled terms:Blade angle  -  Experiment analysis  -  Helical blades  -  Operating parameters  -  Peanut picking roller  -  Plastic membranes  -  Structure optimization  -  Ug softwares 

  Classification code:601.2 Machine Components  -  691.2 Materials Handling Methods  -  723.2 Data Processing and Image Processing  -  821.1 Agricultural Machinery and Equipment  -  821.4 Agricultural Products  -  901.3 Engineering Research  -  921.5 Optimization Techniques 

  DOI:10.6041/j.issn.1000-1298.2014.S0.015 

  Database:Compendex

 

19.  Accession number:20145200366242

  Title:Impact of reclaimed water drip irrigation with different nitrogen fertilizers on CO2 and N2O emissions in summer maize field 

  Authors:Gao, Dawei1 ; Ren, Shumei1 ; Yang, Peiling1 ; Shang, Fangze1 ; Ma, Ning1 ; Shi, Jianguo1  

  Author affiliation:1  College of Water Resources & Civil Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Ren, Shumei 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:168-174 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:During the growth period of summer maize, fresh water (F) and reclaimed water (R) are both used for drip irrigation with no fertilizer (CK), urea (U), ammonium sulfate (A) and slow-release urea (S). From the result of experiment, we can realize the impact of different water quality and different nitrogen fertilizers on CO2 and N2O emissions from the soil and the yield of summer maize. The result showed that the average daily emissions of CO2 flux from the soil irrigated by reclaimed water is reduced by an average of 12.44%, and the average daily emissions of N2O flux from the same soil was increased by an average of 17.31% compared with the soil irrigated by fresh water, From these data, we can know that the impact of irrigation water quality on the average daily emissions of CO2 and N2O is not significant (p>0.05). Compared with no fertilizer treatment, the average daily emissions of CO2 flux from the soil fertilized by urea, ammonium sulfate and slow-release fertilizer were respectively increased by an average of 18.67%, 10.20% and 2.76%, and the average daily emissions of N2O flux from the same soil were respectively increased by an average of 117.73%, 220.21% and 108.70%. From these data, we can know that fertilizer types had an insignificant impact on the average daily emissions of CO2 flux, but it had an significant impact on the average daily emissions of N2O flux (p>0.05). Compared with the national yield of summer maize production, the yield of summer maize was increased by an average of 19.83% from the fertilized soil, and reduced by an average of 0.83% from the unfertilized soil. From these data, we can realize that the impact of different water qualities and fertilizers on summer maize yield was not significant (p>0.05). Under the premise of saving water and ensuring production, the research result plays a very important role in the study of different water qualities and fertilizers to reduce the emissions of CO2 and N2O. 

  Number of references:19 

  Main heading:Carbon dioxide 

  Controlled terms:Irrigation  -  Metabolism  -  Nitrogen  -  Nitrogen fertilizers  -  Reclamation  -  Soils  -  Urea  -  Water quality 

  Uncontrolled terms:Drip irrigation  -  Fertilizing  -  Irrigation water quality  -  Output  -  Re-claimed water  -  Slow release fertilizers  -  Summer maize field  -  Unfertilized soils 

  Classification code:452.4 Industrial Wastes Treatment and Disposal  -  453.2 Water Pollution Control  -  461.9 Biology  -  483.1 Soils and Soil Mechanics  -  804 Chemical Products Generally  -  821.3 Agricultural Methods 

  DOI:10.6041/j.issn.1000-1298.2014.S0.027 

  Database:Compendex

 

20.  Accession number:20145200366254

  Title:Air impingement drying shrinkage characteristics of chinese jujube 

  Authors:Lou, Zheng1 ; Liu, Qing1 ; Shi, Jianfang1 ; Zhao, Yuqiang1 ; Gao, Zhenjiang2  

  Author affiliation:1  Institute of Agricultural Product Processing, Chinese Academy of Agricultural Engineering, Beijing, China

 2  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Liu, Qing 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:241-246 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Chinese jujube originated in China and has a long historical standing. China is the only country which can produce a great amount of Chinese jujube in the world. Modern research showed that the nutrition of Chinese jujube is abundant. Chinese jujube has great medicinal and food value, with high economic value and good prospects for development. Shrinkage characteristics of dates generally refer to volume shrinkage characteristics of whole dates. Large fruit and plump grain appearance of dates is the first choice of consumers to buy elements. The volume of dried jujube points to the consumer's heart, and is an important indicator of consumers whether to buy. Jujube processing enterprises grade the date in accordance with its size, different grades dates have different value and price. Therefore, drying is the most important steps during the dates processing as it affects directly the quality of the product, and the shrinkage characteristics is the most important quality characteristic of Chinese jujube after drying. However, the traditional natural desiccation and desiccation in the drying room of the red dates has many problems. The conventional drying method for Chinese jujube has some disadvantages of severe shrinkage, long drying time and large energy consumption etc. Therefore, in order to improve the quality of dried Chinese jujube and reduce the shrinkage, it is imperative to replace the traditional drying method with the modern technologies. Air impingement drying technology was applied to dry Chinese jujube. The drying characteristics of shrinkage, moisture effective diffusivity considering shrinkage characteristics and the activation energy of Chinese jujube shrinkage were investigated under different air temperatures (55, 60, 65 and 70) and air velocities (6, 9, 12 and 15 m/s). The dynamic changes of the regular pattern for the shrinkage characteristic of Chinese jujube in the air impingement drying process were studied, the results showed that the volume relative shrinkage ratio of Chinese jujube appeared to increase and then decrease with the increase of air temperature and air velocity. Considering shrinkage characteristics, the moisture effective diffusivity of Chinese jujube in the air impingement drying process through the Fick's second law was obtained. The diffusivity appeared to increase and then decrease with the decrease in moisture content in dry basis of Chinese jujube. The Arrhenius equation calculated the shrinkage activation energy of the Chinese jujube was 12.81 kJ/mol. This research provided technical basis for shrinkage characteristics of Chinese jujube using air impingement drying technology. 

  Number of references:27 

  Main heading:Drying 

  Controlled terms:Activation energy  -  Air  -  Atmospheric temperature  -  Driers (materials)  -  Energy utilization  -  Fick's laws  -  Moisture  -  Shrinkage 

  Uncontrolled terms:Air impingement drying  -  Chinese jujube  -  Conventional drying  -  Drying characteristics  -  Effective diffusivities  -  Modern technologies  -  Quality characteristic  -  Shrinkage characteristic 

  Classification code:443.1 Atmospheric Properties  -  525.3 Energy Utilization  -  642.1 Process Heating  -  801.4 Physical Chemistry  -  803 Chemical Agents and Basic Industrial Chemicals  -  804 Chemical Products Generally  -  921 Mathematics  -  951 Materials Science 

  DOI:10.6041/j.issn.1000-1298.2014.S0.039 

  Database:Compendex

 

21.  Accession number:20145200366217

  Title:Proportional controller for electro-hydraulic hitch system in heavy tractor 

  Authors:Zhao, Jianjun1 ; Zhu, Zhongxiang1 ; Song, Zhenghe1 ; Zhou, Ruijuan1 ; Wang, Rupeng1 ; Mao, Enrong1   

  Author affiliation:1  Key Laboratory of Soil-Machine-Plant System Technology, MOA, China Agricultural University, Beijing, China 

  Corresponding author:Mao, Enrong 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:10-16 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:A proportional controller for the electro-hydraulic hitch system was developed based on the microprocessor MC9S12XS128 of Freescale. According to the analysis of the structure, type and characteristic of present proportional controllers for the hitch system, the controller architecture was put forward following the control requirements. The software was designed in the environment of CodeWarrior, and the PID control algorithm was adopted to realize three control modes including traction, position and mixed control for hitch system. By taking the heavy tractor with electro-hydraulic hitch system as the test platform, the field experiment of the proposed proportional controller was carried out, the response time of traction control was 3.89 s while 0.81 s of position control. The results showed that the proportional controller for hitch system comprehensive control in high-power tractor possessed of the features of rapid response, high precision, strong stability, etc. Meanwhile, it can not only improve the field operating efficiency in the guarantee of ride comfort and working quality of tractor, but also can reduce the driver's labor intensity. 

  Number of references:15 

  Main heading:Controllers 

  Controlled terms:Algorithms  -  Automobile testing  -  Position control  -  Proportional control systems  -  Quality control  -  Three term control systems  -  Traction control  -  Tractors (agricultural)  -  Tractors (truck) 

  Uncontrolled terms:Comprehensive controls  -  Control requirements  -  Controller architectures  -  Electro-hydraulics  -  Field experiment  -  Operating efficiency  -  Proportional controller  -  Strong stability 

  Classification code:662 Automobiles and Smaller Vehicles  -  663 Buses, Tractors and Trucks  -  663.1 Heavy Duty Motor Vehicles  -  723 Computer Software, Data Handling and Applications  -  731 Automatic Control Principles and Applications  -  732.1 Control Equipment  -  913.3 Quality Assurance and Control  -  921 Mathematics 

  DOI:10.6041/j.issn.1000-1298.2014.S0.002 

  Database:Compendex

 

22.  Accession number:20145200366220

  Title:Mechanical performance testing device for planter openers based on PLC 

  Authors:Zhao, Jinhui1, 2 ; Yang, Xuejun2 ; Liu, Lijing2 ; Liu, Zhongjun2 ; Zhou, Junping2 ; Jin, Chen2  

  Author affiliation:1  Chinese Academy of Agricultural Mechanization Sciences, Beijing, China

 2  Modern Agricultural Equipment Co. Ltd., Beijing, China 

  Corresponding author:Yang, Xuejun 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:29-34 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:A mechanical performance testing device for planter openers based on PLC was designed. The testing device mainly included control mechanism of working depth, six-component testing device, hydraulic system and PLC control system. In order to improve the stability of working depth, closed loop feedback was adopted for real-time control. Six-component method was used to measuring mechanical performance of opener. The results showed that the measurement precision and the maximum relative error about the traction resistance was 1.49% FS and 3.7%, the vertical counterforce was 2.1% FS and 5.1%, and the lateral force of modified was 0.98% FS and 1.9% with the calibration. The precision of testing device can meet requirements, and the performance testing device can test the force and working depth of different types of openers in high accuracy. 

  Number of references:10 

  Main heading:Hydraulic equipment 

  Controlled terms:Real time control 

  Uncontrolled terms:Closed-loop feedback  -  Maximum relative errors  -  Measurement precision  -  Mechanical performance  -  Opener  -  Planter  -  Testing device  -  Traction resistance 

  Classification code:632.2 Hydraulic Equipment and Machinery  -  731 Automatic Control Principles and Applications  -  732 Control Devices 

  DOI:10.6041/j.issn.1000-1298.2014.S0.005 

  Database:Compendex

 

23. Accession number:20145200366227

  Title:Spraying and removal device for stellera chamaejasme identificated by radar 

  Authors:Zhao, Jianzhu1 ; Zong, Yufeng1 ; Wang, Fengchen1 ; Li, Kun1 ; Li, Shaoxiong1 ; Wang, Guoye1   

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Wang, Guoye 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:68-72 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:According to brush features and height advantage of stellera chamaejasme during its early budding stage, a kind of targeted spraying device for its removed was proposed. The design of the frame system, spraying system, electrical control system and machine structure of the device were completed. By means of radar range sensor technology, the stellera chamaejasme could be automatically identified and site-specific accurately sprayed. The results of real test showed that this device could effectively eliminate stellera chamaejasme with 87.1% pesticide adherent rate. This device could improve the efficiency of stellera chamaejasme removed and reduce the amount of pesticide used, which was benefit for reducing the environmental pollution caused by high amount of continuous spraying. 

  Number of references:11 

  Main heading:Radar 

  Controlled terms:Pesticides 

  Uncontrolled terms:Electrical control system  -  Environmental pollutions  -  Frame systems  -  Machine structures  -  Range sensors  -  Site-specific  -  Spraying system  -  Stellera chamaejasme 

  Classification code:716.2 Radar Systems and Equipment  -  803 Chemical Agents and Basic Industrial Chemicals 

  DOI:10.6041/j.issn.1000-1298.2014.S0.012 

  Database:Compendex

 

24. Accession number:20145200366265

  Title:Application research of solar forage drying air collector automatic tracking system 

  Authors:Du, Jianqiang1 ; Zhang, Junguo1 ; Guo, Zhiping2 ; Shi, Wenbin3  

  Author affiliation:1  Huhhot Branch, Chinese Academy of Agricultural Mechanization Sciences, Huhhot, China

 2  College of Mechanical Engineering, Inner Mongolia University of Technology, Huhhot, China

 3  Inner Mongolia Power (Group) Co. Ltd., Huhhot, China 

  Corresponding author:Guo, Zhiping 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:309-313 and 318 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:A sun-tracking system was developed in order to improve the collection efficiency of solar air collector and receive more solar energy. Several main tracking modes were briefly introduced. The passive-tracking mode was likely to be perplexed by weather condition and the active-tracking mode could not avoid the cumulative error. A single-axe automatic tracking mode which combined active-tracking mode and passive-tracking mode wais presented. The proposed combined mode overcame the shortcomings of the two modes. Experiments showed that this system works with high precision, good stability and little loss of solar energy. Automatic tracking system could make the collector outlet temperature increased an average of 15, so that the collector efficiency was improved. 

  Number of references:10 

  Main heading:Collector efficiency 

  Controlled terms:Drying  -  Servomechanisms  -  Solar energy  -  Tracking (position) 

  Uncontrolled terms:Application research  -  Automatic tracking system  -  Collection efficiency  -  Forage  -  Heat collectors  -  Solar  -  Solar air collector  -  Sun-tracking 

  Classification code:615.2 Solar Power  -  642.1 Process Heating  -  702.3 Solar Cells  -  705 Electric Generators and Motors  -  716.2 Radar Systems and Equipment 

  DOI:10.6041/j.issn.1000-1298.2014.S0.050 

  Database:Compendex

 

25. Accession number:20145200366260

  Title:Quantitative determination of phosphorus in lettuce leaf using spectroscopy 

  Authors:Gao, Hongyan1 ; Mao, Hanping1 ; Zhang, Xiaodong1  

  Author affiliation:1  Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang, China 

  Corresponding author:Mao, Hanping 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:276-280 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to evaluate comprehensively lettuce leaves phosphorus content and precisely control phosphorus fertilizer quantity, the specific aim of this study was to attempt a strategy for measurement of phosphorus content integrating spectroscopy together with synergy interval partial least square (siPLS) and back propagation artificial neural network (BPANN). Leaves reflectance was acquired with a Fieldspec 3 spectroradiometer that provides measurements in the 350~2500 nm spectral range, and then five points smoothed and first-order derivative transform were used to eliminate noise effects. siPLS was used to search for the optimal spectral intervals, which corresponded to 950~1070 nm, 1430~1549 nm, 1906~2025 nm and 2144~2263 nm. 63 wavelengths were selected from 350~2500 nm and 25 wavelengths were selected from four optimal intervals by successive projections algorithm (SPA). Principal component analysis (PCA) was implemented on the spectra intervals or variables, finally 7, 4 and 5 PCs were obtained. The siPLS BPANN, SPA BPANN, siPLS SPA BPANN models were achieved when the number of neurons in the hidden layer was 7, 5 and 3. It was conclude that spectroscopy combined with siPLS SPA BPANN were feasible to measure phosphorus content in lettuce, which had better performance than others model, correlation coefficient for the prediction set was 0.911, root mean square error of the prediction set was 479 mg/kg. 

  Number of references:18 

  Main heading:Principal component analysis 

  Controlled terms:Backpropagation algorithms  -  Mean square error  -  Neural networks  -  Phosphorus  -  Spectroscopic analysis  -  Spectrum analysis 

  Uncontrolled terms:Back propagation artificial neural network (BPANN)  -  Correlation coefficient  -  Lettuce leaf  -  Quantitative determinations  -  Root mean square errors  -  Successive projections algorithm  -  Successive projections algorithms (SPA)  -  Synergy interval partial least squares 

  Classification code:723.4 Artificial Intelligence  -  801 Chemistry  -  804 Chemical Products Generally  -  922.2 Mathematical Statistics 

  DOI:10.6041/j.issn.1000-1298.2014.S0.045 

  Database:Compendex

 

26. Accession number:20145200366216

  Title:Simulation and experiment on multi-directional valve of heavy tractor electro-hydraulic hitch 

  Authors:Zhao, Jianjun1 ; Zhu, Zhongxiang1 ; Song, Zhenghe1 ; Mao, Enrong1 ; Liu, Shourong1 ; Liu, Dongling1  

  Author affiliation:1  Key Laboratory of Soil-Machine-Plant System Technology, MOA, China Agricultural University, Beijing, China 

  Corresponding author:Liu, Shourong 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:1-9 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Taking the multi-directional valve as the research object, this paper analyzed the working principle and structure features of the valve, and the state equations of the multi-directional valve were built by using the pressure-flow equation, flow continuity equation and valve spool force balance equation, then the static and dynamic characteristics of the valve were simulated by using the Fourth-Order Runge-Kutta algorithm in the software Matlab/Simulink. Based on the test platform of closed center load-sensing hydraulic system, experimental study of the multi-directional valve were conducted, results showed that pressure loss of the whole hydraulic system was about 1.5 MPa. During step changes of the displacement of valve spool, the pressure shock of multi-directional valve was small and the response characteristics were good. In addition, the function of load compensation can be realized under the step changes of load pressure, meanwhile, the system flow rate was only concerned with the opening size of the flow control orifice in the multi-directional control valve, so it had a good speed regulating performance without being affected by load variations. The multi-directional valve can meet the requirements of heavy tractor electro-hydraulic hitch. 

  Number of references:15 

  Main heading:Loads (forces) 

  Controlled terms:Equations of state  -  Experiments  -  Hydraulic equipment  -  MATLAB  -  Runge Kutta methods  -  Tractors (agricultural)  -  Tractors (truck) 

  Uncontrolled terms:Directional control valve  -  Flow continuity equations  -  Fourth-order runge-kutta  -  Load sensing  -  Response characteristic  -  Simulation  -  Speed regulating performance  -  Static and dynamic characteristics 

  Classification code:408 Structural Design  -  421 Strength of Building Materials; Mechanical Properties  -  632.2 Hydraulic Equipment and Machinery  -  663.1 Heavy Duty Motor Vehicles  -  901.3 Engineering Research  -  921 Mathematics  -  921.6 Numerical Methods 

  DOI:10.6041/j.issn.1000-1298.2014.S0.001 

  Database:Compendex

 

27. Accession number:20145200366236

  Title:Estimation of heavy metal pollution loads from non-point sources based on GIS/RS 

  Authors:Zhang, Tianjiao1 ; Liu, Gang1, 2 ; Wang, Shengwei2  

  Author affiliation:1  Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing, China

 2  Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, China Agricultural University, Beijing, China 

  Corresponding author:Liu, Gang 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:124-132 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Heavy metal pollution caused enormous risks to human health and ecosystem. In this paper, soil heavy metal concentration was determined through sampling from different land use types in the watershed of Binzhou. With DEM data and remote sensing image, the main routes of pollution from non-point sources, i.e., surface runoff and soil erosion of different land use types were estimated based on SCS-CN model and RUSLE model. The precision of the model was validated and analyzed and heavy metal copper (Cu), lead (Pb) pollution loads from non-point sources in the watershed of Yellow River were estimated. The results showed that big differences exited among the soil heavy metal concentration background values from different land use types in the study area: in industrial land, mining land and grassland, the background value of Cu and Pb was high; in woodland, the value was low. The total loads of Cu and Pb was about 6519.13 kg/a and 2680.04 kg/a. The variation ranges of heavy metal pollution loads from soil erosion were large as well: the values in sparse woodland and grassland were the highest; in woodland and irrigable land were the lowest. The value of heavy metal pollution loads from surface runoff also differed greatly: the value in grassland and sparse woodland was much higher than in woodland and dry land. The research could be used for further analyzing the characteristics of the transfer of heavy metals, studying the heavy metal loads from non-point source, and adjusting the land use structure reasonably. 

  Number of references:25 

  Main heading:River pollution 

  Controlled terms:Copper  -  Erosion  -  Geographic information systems  -  Health risks  -  Heavy metals  -  Image reconstruction  -  Land use  -  Lead  -  Metals  -  Remote sensing   -  Runoff  -  Soil pollution  -  Soils  -  Watersheds 

  Uncontrolled terms:Different land use types  -  Heavy metal pollution  -  Land-use structures  -  Non-point sources pollutions  -  Pollution loads  -  Remote sensing images  -  Soil erosion  -  Surface runoffs 

  Classification code:403 Urban and Regional Planning and Development  -  407 Maritime and Port Structures; Rivers and Other Waterways  -  444.1 Surface Water  -  453 Water Pollution  -  461.7 Health Care  -  483 Soil Mechanics and Foundations  -  483.1 Soils and Soil Mechanics  -  531 Metallurgy and Metallography  -  544.1 Copper  -  546.1 Lead and Alloys  -  723.3 Database Systems  -  731.1 Control Systems  -  741 Light, Optics and Optical Devices 

  DOI:10.6041/j.issn.1000-1298.2014.S0.021 

  Database:Compendex

 

28. Accession number:20145200366224

  Title:Simulation analysis and experiment for gear-linkage-cam combination planting mechanism 

  Authors:Fu, Pengyang1 ; Hu, Jianping1 ; Liu, Fa1 ; Yan, Xiaoyue1  

  Author affiliation:1  Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang, China 

  Corresponding author:Hu, Jianping 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:52-56 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:To meet the dry land punch planting needs, a gear-linkage-cam combination planting mechanism which is composed of planetary gear, planetary carrier, connecting rod, groove cam and plant apparatus was designed. Through the modeling software Pro/E, the virtual prototype model of the plant mechanism was established and it was imported into the rigid kinematics simulation software ADAMS. Simulating the trajectories of the two duck-billed when the motion parameter λ in different conditions as λ<1, λ=1 and λ>1, the results showed that only when λ=1 the motion of plant mechanism could meet the zero velocity for seedling motion requirements and get better seeding status, testing the correctness and rationality of the parameter selection and mechanism design. Taking the self-made automatic vegetable transplanter as experimental prototype and planting mechanism as the research object, the experiment has carried out in two aspects: the planting uniformity and the upright degree of pot seedling. Experiments showed that seedling distance error rate was only 2.22% and seedling perpendicularity was good, proved that the designed planting mechanism could meet the planting requirements. 

  Number of references:12 

  Main heading:Seed 

  Controlled terms:Cams  -  Computer simulation  -  Computer software  -  Experiments  -  Machine design 

  Uncontrolled terms:Combination  -  Duck mouth planting apparatus  -  Motion analysis  -  Transplanter  -  Transplanting mechanisms 

  Classification code:601 Mechanical Design  -  601.3 Mechanisms  -  723 Computer Software, Data Handling and Applications  -  723.5 Computer Applications  -  821.4 Agricultural Products  -  901.3 Engineering Research 

  DOI:10.6041/j.issn.1000-1298.2014.S0.009 

  Database:Compendex

 

29. Accession number:20145200366247

  Title:Straw mixed combustion characteristics and kinetic analysis 

  Authors:Zhang, Linhai1, 2 ; Xue, Dangqin1, 2 ; Li, Gang2 ; Hou, Shulin2   

  Author affiliation:1  College of Mechanical and Automotive Engineering, Nanyang Institute of Technology, Nanyang, China

 2  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Hou, Shulin 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:202-206 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Taking corn stalks in Beijing Daxing District as the main raw material, and the peanut shells and wheat straw as affixation, the combustion characteristics of mixed materials were studied by using thermogravimetric analysis. The combustion dynamics was analyzed by using Coats-Refern method to offer practical and theoretical data for crop straw combustion. Studies showed that combustion curve of three samples had two distinct peaks, which could be divided into four basic stages: water evaporated to dryness, the combustion of volatiles, fixed carbon combustion and burnout. At the same time, a larger overlapping area was laid in the entire combustion stage. The combustion characteristics and kinetic parameters of mixed materials were influenced by adding peanut shells, and less affected on adding wheat straws. 

  Number of references:13 

  Main heading:Combustion 

  Controlled terms:Compounding (chemical)  -  Kinetics  -  Oilseeds  -  Straw  -  Thermogravimetric analysis 

  Uncontrolled terms:Combustion characteristics  -  Combustion dynamics  -  Combustion stage  -  Fixed carbons  -  Kinetic analysis  -  Mixed combustions  -  Mixed materials  -  Overlapping area 

  Classification code:521.1 Fuel Combustion  -  801 Chemistry  -  816.1 Processing of Plastics and Other Polymers  -  821.4 Agricultural Products  -  821.5 Agricultural Wastes  -  931 Classical Physics; Quantum Theory; Relativity 

  DOI:10.6041/j.issn.1000-1298.2014.S0.032 

  Database:Compendex

 

30. Accession number:20145200365912

  Title:Three dimensional numerical simulation of anti-erosion characteristics of chiton Acanthochiton rubrolineatus 

  Authors:Tian, Ximei1 ; Li, Hongwei2 ; Tian, Limei1   

  Author affiliation:1  Key Laboratory of Bionic Engineering of Ministry of Education, Jilin University, Changchun, China

 2  College of Computer Science and Technology, Jilin University, Changchun, China 

  Corresponding author:Tian, Limei 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:319-324 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Molluscan shells lived in harmony with nature upon the combination of multiple factors, e. g., surface morphologies, multilevel structures and component materials, and achieved an optimum adaptation to the surroundings based on such biological coupling functions. The Polyplacophora usually has complex surface topography and specific living behaviors which showed exceptional anti-erosion property. Thus, the chiton Acanthochiton rubrolineatus was selected to study its bionic anti-erosion mechanism. According to biological coupling and bionic anti-erosion property of chiton, the explicit dynamic software ANSYS/LS-DYNA was used to simulate the erosive process of uni-bionic model of configuration and configuration-groove/convex morphology dual-bionic coupled model imitating the shell surface of chiton. The mechanism of erosion of each model was comparatively analyzed. The overall erosion resistance of the three models was sorted as convex-curved plate, groove-curved plate and smooth-curved plate. However, in the peak of the curved plate, the stress dispersion effect of groove was much better than that of convex, whereas the stress dispersion effect of convex was better than that of groove at the pterion region. The simulation results indicated that the shell plate of chiton evolved an optimum combination of morphologies with thick riblets distributed in the peak (grooves were formed between the riblets) and convexes scattered around the pterion region, and thus the chition was endowed with exceptional anti-erosion property. The current research result could be further used in the series of agricultural irrigation machinery, such as water pump, turbine pump, spray irrigation equipment and drip irrigation system. 

  Number of references:15 

  Main heading:Erosion 

  Controlled terms:Biological materials  -  Bionics  -  Computer simulation  -  Dispersions  -  Irrigation  -  Machinery  -  Morphology  -  Numerical models  -  Plates (structural components)  -  Surface topography 

  Uncontrolled terms:Agricultural irrigation  -  ANSYS/LS-DYNA  -  Bionic coupling  -  Chiton  -  Drip irrigation systems  -  Erosion characteristics  -  Multi-level structures  -  Three-dimensional numerical simulations 

  Classification code:407 Maritime and Port Structures; Rivers and Other Waterways  -  408.2 Structural Members and Shapes  -  461.1 Biomedical Engineering  -  461.2 Biological Materials and Tissue Engineering  -  483 Soil Mechanics and Foundations  -  601 Mechanical Design  -  723.5 Computer Applications  -  821.3 Agricultural Methods  -  921 Mathematics  -  931.2 Physical Properties of Gases, Liquids and Solids  -  951 Materials Science 

  DOI:10.6041/j.issn.1000-1298.2014.S0.052 

  Database:Compendex

 

31. Accession number:20145200366258

  Title:Crop baseline extraction method for off-road vehicle based on boundary detection and scan-filter 

  Authors:He, Jie1 ; Meng, Qingkuan1 ; Zhang, Man1 ; Qiu, Ruicheng1 ; Xiang, Ming1 ; Du, Shangfeng1  

  Author affiliation:1  Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing, China 

  Corresponding author:Zhang, Man 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:265-270 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:To accurately detect the baseline of crop row in real-time, a navigation line extraction method that combine boundary detection and scan-filter (BDSF) was proposed. Firstly, the binary image that contained the crop row information was obtained correctly after image preprocessing, including gray-scale processing which adopted the G-R color feather method, and binary processing which use the OSTU method. Secondly, the position of crop row was calculated by vertical projection of the image top and bottom. Thirdly, numbers of rectangle bars of width-equity was used to scan the effective information of image points in the rectangle boxes. Finally, the navigation line was extracted according to the scanning results. The experimental results showed that, the BDSF algorithm could quickly and accurately extract the navigation line. The time consumption for single image of 640 pixels×480 pixels was about 67 ms. Compared with Hough transform and LSM algorithm, the designed algorithm had the advantages of high speed and good robustness. 

  Number of references:15 

  Main heading:Crops 

  Controlled terms:Agricultural machinery  -  Binary images  -  Extraction  -  Hough transforms  -  Navigation  -  Off road vehicles  -  Pixels 

  Uncontrolled terms:Baseline  -  Binary processing  -  Boundary detection  -  Extraction method  -  Navigation lines  -  Scan-filter  -  Time consumption  -  Vertical projection 

  Classification code:662 Automobiles and Smaller Vehicles  -  663 Buses, Tractors and Trucks  -  716.3 Radio Systems and Equipment  -  723.2 Data Processing and Image Processing  -  723.5 Computer Applications  -  802.3 Chemical Operations  -  821.1 Agricultural Machinery and Equipment  -  821.4 Agricultural Products  -  921.3 Mathematical Transformations 

  DOI:10.6041/j.issn.1000-1298.2014.S0.043 

  Database:Compendex

 

32. Accession number:20145200366229

  Title:Simulation of soybean thresher cyclone separating and cleaning system 

  Authors:Zhao, Xueguan1 ; Xu, Liming1 ; Gao, Lianxing2 ; Li, Xianqi2  

  Author affiliation:1  Key Laboratory of Soil-Machine-Plant System Technology, MOA, China Agricultural University, Beijing, China

 2  College of Engineering, Shenyang Agricultural University, Shenyang, China 

  Corresponding author:Gao, Lianxing 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:80-87 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to separate, recycle and second thresh the no cleaned pod effectively, the Fluent software was used for optimization analysis of two different models of cyclone separator with or without bucket. The simulation results showed that there was no significant difference in pressure drop between the two models, cyclone with bucket had higher separation efficiency. Effect of bucket diameter and length on the capture time was not significant. The mathematical relationship model was established between bucket length, diameter and escape time, loss rate and pressure drop. Bucket diameter mainly affected velocity of spiral flow, and bucket length mainly affected the air flow distribution of entrance field. The best parameters of bucket were determined, i.e., the bucket length was 94 mm and diameter was 196 mm. Test was carried out to verify the improved model based on these parameters, and results showed that the loss rate was reduced to 2.2%. 

  Number of references:16 

  Main heading:Computer simulation 

  Controlled terms:Air  -  Cyclone separators  -  Drops  -  Pressure drop 

  Uncontrolled terms:Capture time  -  Cleaning system  -  FLUENT software  -  Mathematical relationship  -  Optimization analysis  -  Separation efficiency  -  Simulation  -  Soybean 

  Classification code:443.1 Atmospheric Properties  -  723.5 Computer Applications  -  802.1 Chemical Plants and Equipment  -  804 Chemical Products Generally  -  931.1 Mechanics 

  DOI:10.6041/j.issn.1000-1298.2014.S0.014 

  Database:Compendex

 

33. Accession number:20145200366238

  Title:Detection system of droplet impact force based on PVDF sensor 

  Authors:Zheng, Yongjun1 ; Ma, Chao1 ; Zhang, Yanchao1 ; Li, Yongchong2 ; Yan, Haijun2   

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China

 2  College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Yan, Haijun 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:142-147 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:The water droplets impact of irrigation equipment is an important technical indicator for measuring nozzle performance. The impact force of water droplets hit the surface of the soil would erode the soil, causing soil compaction, resulting in runoff affect the infiltration effect, while water droplets impact would cause foliar damage, which affects crop growth. This paper developed a droplet impact automatic detection system to measure the water droplets impact force. The PVDF piezoelectric sensor was chosen as the sensing element, and the water droplets automatically generating device was designed by a stepping motor drive and system was controlled by a microcontroller. The USB7333 high-speed data acquisition card was used and the program was written in LabWindows/CVI-based computer data acquisition and process procedures to detect the water impact force. As the result, in the frequency of water droplets, the size of the stability control experimental conditions, the detection system could achieve the dynamic measurement of different droplets size to show that the PVDF piezoelectric sensor for detecting water droplet impact with good dynamic response. The result proved that the water droplets micro force sensor output voltage had a good linear relationship, and the trend line with the actual data fitting degree of 0.936, the system measurement error less than 10%. This droplet impact force detection system solves the traditional manual measurement method of water droplets instability problems and has great practical application value. 

  Number of references:11 

  Main heading:Spray nozzles 

  Controlled terms:Data acquisition  -  Digital storage  -  Drops  -  Dynamic response  -  Electric drives  -  Electric sensing devices  -  Piezoelectric transducers  -  Piezoelectricity  -  Sensors  -  Soil mechanics   -  Soils  -  Sprinkler systems (irrigation)  -  Stepping motors 

  Uncontrolled terms:Automatic detection systems  -  Computer data acquisition  -  Detection system  -  Experimental conditions  -  High speed data acquisition  -  Manual measurement methods  -  Sprinkler irrigation  -  Water droplets 

  Classification code:408.1 Structural Design, General  -  443.1 Atmospheric Properties  -  483.1 Soils and Soil Mechanics  -  631.1 Fluid Flow, General  -  701.1 Electricity: Basic Concepts and Phenomena  -  704 Electric Components and Equipment  -  705 Electric Generators and Motors  -  705.3 Electric Motors  -  722.1 Data Storage, Equipment and Techniques  -  723.2 Data Processing and Image Processing  -  732 Control Devices  -  801 Chemistry  -  821.1 Agricultural Machinery and Equipment 

  DOI:10.6041/j.issn.1000-1298.2014.S0.023 

  Database:Compendex

 

34. Accession number:20145200366252

  Title:Effects of hydrocolloids on characteristics of frozen dough and quality of bread 

  Authors:Wang, Xuan1 ; Yin, Xiaomeng1 ; Liang, Jianfen1   

  Author affiliation:1  College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Liang, Jianfen 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:230-235 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:There are a number of problems on the application of frozen dough technology which is developing rapidly and used widely on baking industry or other flour products industry now, such as the decrease of yeast activity, longer fermentation time, deterioration of dough quality, smaller product volume and a rough crumb. However, the use of hydrocolloids can enhance the properties of either frozen or unfrozen dough. Several researches have been done to discuss the application of a few hydrocolloids on frozen dough technology. The objective of this study was to systematically understand the effect of hydrocolloids on bread dough and the influence of xanthan gum (X), sodium caseinate (SC) and gum arabic (A) on the tensile properties, yeast fermenting power and freezable water content of fresh and frozen dough by using FTC texture analyzer, absorption titration method and differential scanning calorimeter. The result showed that three gum all could significantly enhance the tensile resistance of the dough (both fresh and frozen dough), and X caused most obvious increase by 76% and 58%, which made the maximum tensile resistance of fresh and frozen dough. For yeast fermenting power, dough with X or A both showed a higher yeast power of gas, which improved the gas production of fresh and frozen dough by 119% and 208%, 83% and 113%, respectively, while SC had no effect. For freezable water, the three kinds of gum reduced freezable water content in frozen dough, which played a role in protection of yeast during freezing, and the effect from large to small was A, X and SC. To realize the influence of hydrocolloids on bread quality, the bread made of fresh and frozen dough added X, SC or A with the indicators of bread specific volume and textural properties of crumb were evaluated by texture analyzer. The results showed that A improved either fresh or frozen dough bread quality, which increased the specific volume of bread made with fresh and frozen dough by 9% and 16%, respectively. X and SC had no positive effects on overall bread quality, but X had a positive effect on improving the resilience of frozen dough bread crumb. 

  Number of references:14 

  Main heading:Food products 

  Controlled terms:Colloids  -  Differential scanning calorimetry  -  Fermentation  -  Textures  -  Titration  -  Water absorption  -  Yeast 

  Uncontrolled terms:Bread quality  -  Differential scanning calorimeters  -  Dough fermentations  -  Frozen doughs  -  Hydrocolloids  -  Tensile resistance  -  Textural properties  -  Texture analyzers 

  Classification code:801 Chemistry  -  802.2 Chemical Reactions  -  802.3 Chemical Operations  -  822.3 Food Products  -  933 Solid State Physics 

  DOI:10.6041/j.issn.1000-1298.2014.S0.037 

  Database:Compendex

 

35. Accession number:20145200366262

  Title:Design and experiment on automatic grading machine for kiwi 

  Authors:Zuo, Xingjian1 ; Wu, Guangwei1   

  Author affiliation:1  Beijing Research Center for Intelligent Agriculture Equipments, Beijing, China 

  Corresponding author:Wu, Guangwei 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:287-295 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:The kiwifruit automatic grading machine is an important machine for postharvest processing of kiwifruit. A set of practical automatic kiwi fruit grading machine was designed based on technologies of mechanical separation and conveyance, image capture and processing as well as intelligent control. This set of equipment mainly consisted of material storage bin, single-line positioning system, image capture system and grading executive system. And it also has programs of image capture, image processing, grade determination and human-machine interaction for the host computer as well as control programs for the slave computer. By testing, this machine was capable of grading by three features of size, shape and surface defect and their grading accuracy could reach to 88.9%, 91% and 94%, respectively. And the accuracy of integrated grading could reach to 86%. 

  Number of references:30 

  Main heading:Fruits 

  Controlled terms:Birds  -  Grading  -  Human computer interaction  -  Image processing  -  Neural networks  -  Surface defects 

  Uncontrolled terms:Automatic grading  -  BP neural networks  -  Human machine interaction  -  Kiwi  -  Material storages  -  Mechanical separation  -  Positioning system  -  Postharvest processing 

  Classification code:421 Strength of Building Materials; Mechanical Properties  -  461 Bioengineering and Biology  -  741 Light, Optics and Optical Devices  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  821.4 Agricultural Products  -  822 Food Technology  -  913.3 Quality Assurance and Control  -  951 Materials Science 

  DOI:10.6041/j.issn.1000-1298.2014.S0.047 

  Database:Compendex

 

36. Accession number:20145200366218

  Title:Design and overcoming obstacles ability research of tracked driving chassis with planetary structure 

  Authors:Liu, Pingyi1 ; Wang, Zhenjie1 ; Li, Haitao1 ; Zhang, Shaoying1 ; Wei, Wenjun1  

  Author affiliation:1  College of Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Liu, Pingyi 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:17-23 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:According to the irregularities and complexities of farmland in rough terrains such as hill and mountain areas, a kind of agricultural driving chassis which can operate via four groups of tracked driving device with planetary structure (TDDPS) was designed. The device's configuration characteristic, structural change and moving condition of running on the flat road, terrain adaptive locomotion in the field and overcoming the obstacles by turnover, and the passing principles of terrain adaptive locomotion or turnover were analyzed. The maximum height by terrain adaptive locomotion and the limit geometric height by turnover were calculated. The experiment proved that the chassis prototype had excellent off-road abilities, which can meet requirements for running and working in rough agricultural terrain. 

  Number of references:13 

  Main heading:Landforms 

  Controlled terms:Agriculture  -  Chassis  -  Roads and streets 

  Uncontrolled terms:Adaptive locomotion  -  Configuration characteristics  -  Driving device  -  Four-group  -  Overcoming obstacles  -  Rough terrains 

  Classification code:406.2 Roads and Streets  -  481.1 Geology  -  663.2 Heavy Duty Motor Vehicle Components  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control 

  DOI:10.6041/j.issn.1000-1298.2014.S0.003 

  Database:Compendex

 

37. Accession number:20145200366237

  Title:Yield-increasing potential of middle-season rice in hubei province based on GIS and multi-source data 

  Authors:Sun, Yihui1 ; He, Liyuan1   

  Author affiliation:1  College of Resource and Environment, Huazhong Agricultural University, Wuhan, China 

  Corresponding author:He, Liyuan 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:133-141 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Based on researches of light-temperature production potential, availability and regional planning of rice in Hubei province using GIS method, this paper reported the establishment of GIS based database by combination of mechanism method and experience approach, with the support of data of sub-counties' (cities, districts) rice actual production, meteorological data, terrain and etc. in Hubei province between years 1993-2012. The potential productivities of light, temperature, climate, arable land, yield-increasing potential and potential increase space were calculated by considering rules of production and development of middle-season rice. The yield potential was divided into five districts and the charts were drawn respectively. Natural resources and utilization status in different middle-season rice growing regions of sub-counties and cities in Hubei province were investigated further. The potential yield of middle-season rice in Hubei province is great and the theoretical value can reach 11877957 tons. The main limiting factors of potential yield are the arable land and the climate. The results of this study and the established database will provide valuable referees for guidance and plan of rice cultivation, industrial restructuring and implementation of high technology project in Hubei province. 

  Number of references:31 

  Main heading:Zoning 

  Controlled terms:Cultivation  -  Geographic information systems  -  Land use  -  Meteorology  -  Regional planning 

  Uncontrolled terms:Industrial restructuring  -  Meteorological data  -  Middle-season rice  -  Multisource data  -  Potential productivity  -  Resource utilizations  -  Theoretical values  -  Yield-increasing 

  Classification code:403 Urban and Regional Planning and Development  -  403.2 Regional Planning and Development  -  443 Meteorology  -  723.3 Database Systems  -  821.3 Agricultural Methods 

  DOI:10.6041/j.issn.1000-1298.2014.S0.022 

  Database:Compendex

 

38. Accession number:20145200366219

  Title:Performance detection system of tray precision seeder based on machine vision 

  Authors:Zhao, Zhengbin1 ; Liu, Yucheng1 ; Liu, Zhongjun1 ; Gao, Bo2  

  Author affiliation:1  Modern Agricultural Equipment Co. Ltd., Beijing, China

 2  Menoble Co. Ltd., Beijing, China 

  Corresponding author:Liu, Yucheng 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:24-28 

  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 reseeding, miss-seeding and instability issue in the vegetable tray precision seeder, the seedling performance was detected in the tray precision seeder based on machine vision technology. The performance detective device was setting in the tray precision seeder. Double-camera took tray images one by one after the tray was detected by photosensor, and then these images were transferred to the computer in real-time. The images were processed and analyzed by the vision algorithm software, the seeds could be seen in the tray and the results and photos were displayed on the screen together. The test showed that the reseeding detection accuracy was 98.94% and miss-seeding detection accuracy was 99.33%. 

  Number of references:14 

  Main heading:Computer vision 

  Controlled terms:Agricultural machinery 

  Uncontrolled terms:Detection accuracy  -  Detection system  -  On-machines  -  Photosensor  -  Real- time  -  Seedling performance  -  Tray seeders  -  Vision algorithms 

  Classification code:723.5 Computer Applications  -  821.1 Agricultural Machinery and Equipment 

  DOI:10.6041/j.issn.1000-1298.2014.S0.004 

  Database:Compendex

 

39. Accession number:20145200366234

  Title:Design and experiment of forage seed processing line 

  Authors:Wang, Quanxi1 ; Zhang, Junguo1 ; Bao, Desheng1 ; Zhai, Gaixia1 ; Zhang, Ping1 ; Wang, Jianping1  

  Author affiliation:1  Huhhot Branch, Chinese Academy of Agricultural Mechanization Sciences, Huhhot, China 

  Corresponding author:Wang, Quanxi 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:113-118 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Aiming at the design requirements on the main equipments of the forageseed processing line-not only work continuously on set, but also work independently-the processing line was designed. The processing line adapted the style of host plane layout and hopper feeding at different sites, and combined series conveying material by head-shaped lifter. The structure of the tee with door, pipe connection clip and dust removal pipe air separation unit was designed. Taken the Elymus nutans Griseb with purity 85%~88% as processing object, the experiment was finished. The results showed that the productivity was no less than 800 kg/h, the purity was no less than 97%, the percentage of chosen seed was no less than 95%, the Kilowatt hour productivity was no less than 25 kg/(kW·h), the effective use degree was no less than 95%, and the dust concentration was no less than 0.3 mg/m3. 

  Number of references:3 

  Main heading:Experiments 

  Controlled terms:Dust  -  Productivity 

  Uncontrolled terms:Air separation unit  -  Dust concentrations  -  Dust removal  -  Elymus nutans  -  Processing lines 

  Classification code:451.1 Air Pollution Sources  -  901.3 Engineering Research  -  913.1 Production Engineering 

  DOI:10.6041/j.issn.1000-1298.2014.S0.019 

  Database:Compendex

 

40. Accession number:20145200366241

  Title:Evaluation of regulated deficit irrigation performance with saline water based on principal component analysis 

  Authors:He, Xin1 ; Yang, Peiling1 ; Ren, Shumei1 ; Cheng, Manjin2 ; Zhang, Yiqiang3 ; Jiang, Guangyu1  

  Author affiliation:1  College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China

 2  Institute of Water Conservancy Science Research of Inner Mongolia, Huhhot, China

 3  Water Conservancy Research Institute of Bayannaoer, Linhe, China 

  Corresponding author:Yang, Peiling 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:162-167 and 132 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to find optimal regulated deficit irrigation scheduling with saline water for better oil quality, higher yield and safer management of high oleic oil sunflower, a pot experiment was conducted and the principle component analysis method was used to establish a comprehensive irrigation quality index of saline water by the weighted sum of different evaluation indices. Then, this index was applied to evaluate and analyze the performance of saline water deficit irrigation effect. The results showed that comprehensive irrigation quality principle component obeyed normal distribution significantly, and included 93.29% primordial quality attribute variation information with better representation and objectivity, and thus it could be used as the overall oil sunflower regulated deficit irrigation with saline water evaluation index. The critical concentration of saline water for oil sunflower in Hetao Irrigation District is 3.5 g/L, and the most suitable period of water deficit is the floral initiation stage. When the concentration of saline water is low (less than 3.5 g/L), the regulated deficit irrigation with saline water has less effect on the yield and quality of oil sunflower. When the concentration is 3.5 g/L, irrigation scheduling with mild deficit (80%I) in floral initiation stage and 278.28 mm water amount during the total growth period should be the optimal irrigation pattern for saline water of regulated deficit irrigation with the coordinated yield and quality of oil sunflower. 

  Number of references:18 

  Main heading:Saline water 

  Controlled terms:Irrigation  -  Normal distribution  -  Oil shale  -  Principal component analysis  -  Quality control  -  Scheduling  -  Sunflower oil 

  Uncontrolled terms:Critical concentration  -  Hetao irrigation districts  -  Irrigation performance  -  Irrigation scheduling  -  Oil sunflower  -  Principle component analysis  -  Regulated deficit irrigation  -  Water evaluation index 

  Classification code:444 Water Resources  -  512.1 Petroleum Deposits  -  804.1 Organic Compounds  -  821.3 Agricultural Methods  -  912.2 Management  -  913.3 Quality Assurance and Control  -  922.1 Probability Theory  -  922.2 Mathematical Statistics 

  DOI:10.6041/j.issn.1000-1298.2014.S0.026 

  Database:Compendex

 

41. Accession number:20145200366243

  Title:Effect of CO2 enrichments under different water conditions on growth of tomato in heliogreenhouse 

  Authors:Zhou, Shili1 ; Qu, Yinghua1 ; Wang, Hongyu1 ; Xiong, Jun1  

  Author affiliation:1  College of Water Resources & Civil Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Qu, Yinghua 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:175-181 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Heliogreenhouse has become the major protected horticulture industry in China due to its environmental friendly and energy saving features, however, the healthy development of heliogreenhouse is still limited by many problems. In view of extremely CO2 deficient and water resources waste caused by lax water management in heliogreenhouse, we investigated the growth and photosynthetic characteristics of tomato plants under four different CO2 levels, i. e., ambient CO2 concentration in heliogreenhouse (about 450 μmol/mol), elevated CO2 concentrations are (700±50) μmol/mol (low), (1000±50) μmol/mol (moderate), (1300±50) μmol/mol (high) combined with three different water levels, i.e., substrate water content are 35%~45% (low), 55%~65% (moderate), 75%~85% (high) of saturated substrate water content. The results showed that biomass of below ground, net photosynthetic rate, chlorophyll contents (SPAD) were increased and plants bloomed 6~11 d earlier in moderate and high CO2 level plants. AQY and ACE were markedly increased by 45%~118% and 66%~81%, respectively; meanwhile, LCP was significantly reduced by 34%~57% in CO2 enrichment plants under moderate water condition. Compared with low water level, Pmax was markedly increased by 42.8% and 52.1%; AQY was markedly increased by 10.7% and 25.9%; LCP was reduced by 29.1% and 63.4%; CCP was reduced by 20.8% and 8.3% in moderate and high water level plants under the measured high CO2 condition, respectively. Compared with the plants grown under ambient CO2 concentration, the MDA content reduced by 4%~10% in CO2 elevated plants under low water condition, this indicated that CO2 enrichment could alleviate oxidative damage of tomato plants that subjected to low water condition. Compared with the plants that grown in moderate water level under ambient CO2 concentration, blooming time was 3~7 d earlier and yield of first spike fruit was increased by 18%~44% in low water level plants under CO2 elevated conditions, meanwhile, compared with the plants that grown in high water level under ambient CO2 concentration, blooming time was 8 and 10 d earlier and yield of first spike fruit was increased by 42.8% and 34.0% in moderate water level plants under moderate and high CO2 condition, respectively, this indicated that water use efficiency which related to yield was enhanced by elevating CO2 concentration. 

  Number of references:16 

  Main heading:Carbon dioxide 

  Controlled terms:Atmospheric composition  -  Energy conservation  -  Fruits  -  Plants (botany)  -  Waste management  -  Water levels  -  Water management 

  Uncontrolled terms:ACE  -  AQY  -  Chlorophyll contents  -  Environmental-friendly  -  Heliogreenhouse  -  MDA content  -  Net photosynthetic rate  -  Photosynthetic characteristics 

  Classification code:444 Water Resources  -  446 Waterworks  -  452 Municipal and Industrial Wastes; Waste Treatment and Disposal  -  461.9 Biology  -  525.2 Energy Conservation  -  614.2 Steam Power Plant Equipment and Operation  -  801 Chemistry  -  804.2 Inorganic Compounds  -  821.4 Agricultural Products 

  DOI:10.6041/j.issn.1000-1298.2014.S0.028 

  Database:Compendex

 

42. Accession number:20145200366259

  Title:Real-time path planning and navigation in GNSS-controlled land leveling 

  Authors:Wang, Yan1 ; Li, Hongpeng2 ; Niu, Dongling2 ; Li, Xiao2 ; Liu, Gang1, 2   

  Author affiliation:1  Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing, China

 2  Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, China Agricultural University, Beijing, China 

  Corresponding author:Liu, Gang 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:271-275 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:GNSS-controlled (Global navigation satellite system) land leveling technology plays an important role in improving the landform of field surface, also in enhancing use efficiency of water and irrigation efficiency. Aiming at improving the working efficiency of GNSS-controlled land leveling system, the application of real-time intelligent navigation technology, which provided decision-making aid in land precise leveling, had explored. A tension sensor was added into this GNSS-controlled land leveling system to realize the load monitoring of the forklift. The model of real-time land planning and navigation during the time of land leveling was set up, using mathematical modeling methods. The destination point of tractor was calculated with the load data and the terrain around it, in the principle of reducing the times of overload and empty load situations. Therefore, the turning angle could be calculated to give the navigation information to the users. Farmlands experiments were taken in the end and it turned out that: firstly, this method could be used to guide the driving in the process of land leveling quite well. Secondly, within the same leveling time in these experiments, the leveling effects with land planning and navigation functions showed to be much better than those of without. Finally, the sum proportion of overload and empty load when the land planning and navigation functions worked was no more than 6.9%, much better than the situation of without these functions. 

  Number of references:18 

  Main heading:Navigation systems 

  Controlled terms:Decision making  -  Efficiency  -  Experiments  -  Global positioning system  -  Leveling (machinery)  -  Motion planning  -  Navigation 

  Uncontrolled terms:Global Navigation Satellite Systems  -  GNSS  -  Intelligent navigation  -  Irrigation efficiency  -  Land leveling  -  Load monitoring  -  Navigation functions  -  Navigation in formation 

  Classification code:434.4 Waterway Navigation  -  603.1 Machine Tools, General  -  716.3 Radio Systems and Equipment  -  731.5 Robotics  -  901.3 Engineering Research  -  912.2 Management  -  913.1 Production Engineering 

  DOI:10.6041/j.issn.1000-1298.2014.S0.044 

  Database:Compendex

 

43. Accession number:20145200366222

  Title:Design and experiment on metering hole structure of centrifugal precision metering device for rapeseed 

  Authors:Cao, Xiuying1 ; Liao, Qingxi1 ; Cong, Jinling1, 2 ; Liao, Yitao1  

  Author affiliation:1  College of Engineering, Huazhong Agricultural University, Wuhan, China

 2  College of Mechanical and Electrical Engineering, Shihezi University, Shihezi, China 

  Corresponding author:Liao, Qingxi 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:40-46 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Based on problem that metering holes of centrifugal metering device were easily blocked and led to broken rows, the influential factors on blocking of metering hole was analyzed to develop a new structure of metering hole. The critical diameter of metering hole which only took one seed, two seeds or three seeds were determined via the model of relationship among rotation speed, structural parameters of hole and geometric properties of rapeseed. Combined with simulation of trajectory of seeds via discrete element method (DEM) software EDEM, the relevant critical diameter values of metering hole which only took one seed, two seeds or three seeds were 2.6 mm, 3.5 mm and 3.8 mm, respectively. The test research was carried out to achieve the relationship of hole diameter, rotate speed and the performance of metering device. Experiment results showed that when the hole diameter was 3.8 mm, variation coefficient of spacing row consistency and stability of full seeding quantity were less than 16.4% and 14.8%, respectively, and there was no blocked hole. 

  Number of references:21 

  Main heading:Oilseeds 

  Controlled terms:Centrifugation  -  Computer software  -  Experiments 

  Uncontrolled terms:Consistency and stabilities  -  Hole structures  -  Metering devices  -  Metering hole blocked  -  Rapeseed  -  Simulation of trajectory  -  Structural parameter  -  Variation coefficient 

  Classification code:723 Computer Software, Data Handling and Applications  -  802.3 Chemical Operations  -  821.4 Agricultural Products  -  901.3 Engineering Research 

  DOI:10.6041/j.issn.1000-1298.2014.S0.007 

  Database:Compendex

 

44. Accession number:20145200366244

  Title:Interactive effect of CO2 enrichment and nutrient on growth of tomato in solar greenhouse 

  Authors:Wang, Hongyu1 ; Qu, Yinghua1 ; Zhou, Shili1 ; Xiong, Jun1  

  Author affiliation:1  College of Water Resources & Civil Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Qu, Yinghua 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:182-188 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Taking “Zhongza 105” tomato as tested material, the experiment focused on the effect of different CO2 enrichment concentrations and different nutrient supply intensities on the growth of tomato cultivated in substrate in solar greenhouse. This study set up 4 CO2 levels, including no enrichment (C0), (700±50)μmol/mol (C1), (1000±50) μmol/mol (C2), (1 300±50)μmol/mol (C3) and 3 nutrient levels based on a dose (S) of Yamazaki tomato recipe nutrient solution concentration, including 1/2S (F1), 1S (F2), 2S (F3). The results indicated that stem diameter, SPAD value of leaves, fresh and dry weight of plants, nitrogen content of leaves and weight of the first spike fruit were increased significantly with increasing nutrient quantity at the same CO2 level, and blooming date was advanced. CO2 enrichment increased stem diameter, SPAD value of leaves, fresh and dry weight of plants and weight of the first spike fruit, but reduced the position of the first inflorescence and made blooming date ahead of time at the same nutrient. When the concentration of CO2 enrichment was (1000±50) μmol/mol or (1300±50) μmol/mol, the nitrogen content of leaves was elevated. The promoting effect of CO2 enrichment on the growth of tomato was associated with nutrient quantity, under low and moderate nutrient conditions, CO2 enrichment at (1000±50) μmol/mol was adequate for reducing the position of the first inflorescence of 1.0 compared with the control (C0F1 or C0F2), advancing the florescence for 5~8 d and increasing the weight of the first spike fruit significantly. Under high nutrient condition, CO2 enrichment at (1300±50) μmol/mol made the position of the first inflorescence lowest, 1.7 lower than the control (C0F3), the florescence was the earliest, which was 10 d earlier than the control, and the weight of the first spike fruit was the maximum, 24.15% higher than the control. The response of position of the first inflorescence, florescence and weight of the first spike fruit to CO2 enrichment depended strongly on the level of nutrient supply. High nutrient level improved the response of these indexes to CO2 enrichment. According to the entire growth index, C3F3 was the best combination of CO2 and nutrient, its stem diameter and weight of the first spike fruit were the maximum, position of the first inflorescence was the lowest and blooming date was the earliest. 

  Number of references:13 

  Main heading:Carbon dioxide 

  Controlled terms:Atmospheric composition  -  Fruits  -  Greenhouse effect  -  Greenhouses  -  Nitrogen  -  Nutrients  -  Solar heating  -  Vegetation 

  Uncontrolled terms:Interactive effect  -  Nitrogen content  -  Nutrient conditions  -  Nutrient solution  -  Nutrient supply  -  Position of the first inflorescence  -  Promoting effect  -  Solar greenhouse 

  Classification code:451 Air Pollution  -  643.1 Space Heating  -  801 Chemistry  -  804 Chemical Products Generally  -  804.2 Inorganic Compounds  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control 

  DOI:10.6041/j.issn.1000-1298.2014.S0.029 

  Database:Compendex

 

45. Accession number:20145200366233

  Title:Design and experiment of trail-type V-shape folding hay rake 

  Authors:Luo, Jinhai1 ; Wang, Zhenhua1 ; Li, Zhijie1 ; Yang, Li1 ; Guo, Xiyan1 ; Wu, Yamei1  

  Author affiliation:1  Huhhot Branch, Chinese Academy of Agricultural Mechanization Sciences, Huhhot, China 

  Corresponding author:Luo, Jinhai 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:107-112 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:The basic structure and work principal of trail-type V-shape folding hay rake were introduced. The structure of the finger wheel which was the main working part of the machine was designed and the motion trail of the tooth was analyzed. The finger wheel of the machine was studied with simulation analysis by the ADAMS software. The double-hydraulic system was designed to realize automation control. Experiment results indicated that the hay rake had good performance and reasonable structure, the variation coefficient of uniformity of windrow was 15.8%, miss raking rate was 1.2% and leaf loss rate was 2.3%. The hay rake could fold or unfold into a V-shape, so the working raking width could be changed, it could be transported without any difficulties. The whole finger wheels could be risen and fallen automatically and its single finger wheel was adjustable, so it had a good profile modeling ability. The hay rake could perform rake and tedding simultaneously. 

  Number of references:5 

  Main heading:Wheels 

  Controlled terms:Computer software  -  Design  -  Experiments  -  Hydraulic equipment  -  Hydraulic machinery 

  Uncontrolled terms:ADAMS software  -  Automation controls  -  Basic structure  -  Hay rake  -  Hydraulic system  -  Modeling abilities  -  Simulation analysis  -  Variation coefficient 

  Classification code:408 Structural Design  -  601.2 Machine Components  -  632.2 Hydraulic Equipment and Machinery  -  723 Computer Software, Data Handling and Applications  -  901.3 Engineering Research 

  DOI:10.6041/j.issn.1000-1298.2014.S0.018 

  Database:Compendex

 

46. Accession number:20145200366253

  Title:Process optimization for extraction of mussel polysaccharides assisted by high intensity pulsed electric fields 

  Authors:Zhou, Yajun1 ; He, Qin1 ; Wu, Dufeng1 ; Yin, Yongguang1 ; Dong, Zhouyong1  

  Author affiliation:1  College of Biological and Agricultural Engineering, Jilin University, Changchun, China 

  Corresponding author:Zhou, Yajun 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:236-240 and 235 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:The high intensity pulsed electric fields (PEF) technique was applied for assisted extraction of mussel polysaccharides to improve the efficiency of mussel polysaccharides extraction. The single factor test and Box-Behnken design results showed that electrical field strength and pulse number were the significant affecting factors on the extraction efficiency of mussel polysaccharides. With mathematical regression model analysis of extraction efficiency and the impact factor, the optimal combination of parameters was found that electrical field strength was 25 kV/cm, pulse number was 8, water-powder ratio was 40 mL/g. Under the optimized condition, the extraction rate of 2 g mussel was up to 4.99% (polysaccharides-wet weight sample ratio). Compared with ultrasonic technique, high intensity pulse electric fields is less time-consuming with higher extraction efficiency. The study can provide a reference for further studies of extraction of mussel polysaccharides. 

  Number of references:21 

  Main heading:Extraction 

  Controlled terms:Efficiency  -  Electric field effects  -  Mathematical models  -  Molluscs  -  Optimization  -  Polysaccharides  -  Regression analysis  -  Ultrasonic applications  -  Ultrasonic testing 

  Uncontrolled terms:Assisted extractions  -  Electrical field strength  -  Extraction efficiencies  -  High intensity pulse  -  High-intensity pulsed electric fields  -  Mussel  -  Processing optimizations  -  Ultrasonic techniques 

  Classification code:471 Marine Science and Oceanography  -  701.1 Electricity: Basic Concepts and Phenomena  -  753.3 Ultrasonic Applications  -  802.3 Chemical Operations  -  804.1 Organic Compounds  -  913.1 Production Engineering  -  921 Mathematics  -  921.5 Optimization Techniques  -  922.2 Mathematical Statistics 

  DOI:10.6041/j.issn.1000-1298.2014.S0.038 

  Database:Compendex

 

47. Accession number:20145200366225

  Title:Design for soil separating device from apple seedling root 

  Authors:Li, Jianping1 ; Liu, Junfeng1 ; Yang, Xin1 ; Wang, Pengfei1  

  Author affiliation:1  Mechanical and Electronic Engineering College, Agricultural University of Hebei, Baoding, China 

  Corresponding author:Li, Jianping 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:57-62 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:The soil separation device, composited with vibration unit and transformation unit, was designed by using AIP software. The proposed device was assembled at the type QM-500 fruit seedling lifter came with a 58.8 kW tractor. The experiments were carried out in the fruit seedling breeding base of Lixian county. Experiments showed that when the eccentric distance was 52 mm, the tilt angle was 13.72°, the coefficient of travel speed variation was 1.02, the polar angle was 2.03°. The field experiments showed that the lifting efficiency was 1.6 plants per second. The manpower was decreased by 50.85% which reduced the labor intensity and realized the simplified operation of the apple seedling lifter. 

  Number of references:1 

  Main heading:Fruits 

  Controlled terms:Experiments  -  Mechanisms 

  Uncontrolled terms:Apple nursery  -  Crank-rocker mechanism  -  Eccentric distances  -  Lifter  -  Lifting efficiencies  -  Separating device  -  Separation devices  -  Transformation units 

  Classification code:601.3 Mechanisms  -  821.4 Agricultural Products  -  901.3 Engineering Research 

  DOI:10.6041/j.issn.1000-1298.2014.S0.010 

  Database:Compendex

 

48. Accession number:20145200366255

  Title:Rice drying using heat pump dehumidifying system with heat pipe 

  Authors:Luo, Qiaojun1, 2 ; Zhang, Jinjiang2 ; Wu, Yaosen2 ; Liu, Qinghua2  

  Author affiliation:1  College of Engineering, South China Agricultural University, Guangzhou, China

 2  Guangdong Institute of Modern Agricultural Equipment, Guangzhou, China 

  Corresponding author:Zhang, Jinjiang 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:247-251 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:The ambient air dehumidification needs cooling down the air temperature in conventional heat pump dehumidification system. However, it decreased the temperature of hot air to the grain dryer, which reduced rice drying rate and increased energy consumption at the same time. A heat pipe heat exchanger was installed on the two sides of evaporator of heat pump dehumidification system, which was used for pre-cooling and pre-heating of ambient air respectively, so that dehumidifying capacity can be enhanced and the hot air temperature can be increased. Experiential results showed that with heat pipe in the system, the energy consumption of dehumidification were reduced by 9.6%~28.4% when air relative humidity was 60%~78% at 27. Meanwhile, the results demonstrated that dehydrating 1 kg water from rice consumed 1560 kJ energy when inlet air with relative humidity of 80.2% at 26.2 , and saved 18.2% of energy compared with traditional heat pump dehumidification system. 

  Number of references:14 

  Main heading:Heat pipes 

  Controlled terms:Atmospheric temperature  -  Drying  -  Energy conservation  -  Energy utilization  -  Heat pump systems  -  Humidity control  -  Pumps 

  Uncontrolled terms:Air temperature  -  Dehumidification system  -  Dehumidifying system  -  Drying rates  -  Heat pipe heat exchangers  -  Heat pumps  -  Hot air temperature  -  Rice 

  Classification code:402 Buildings and Towers  -  443.1 Atmospheric Properties  -  525.2 Energy Conservation  -  525.3 Energy Utilization  -  618.2 Pumps  -  641.2 Heat Transfer  -  642.1 Process Heating 

  DOI:10.6041/j.issn.1000-1298.2014.S0.040 

  Database:Compendex

 

49. Accession number:20145200366261

  Title:Control system for automatic aquatic plant cleaning ship 

  Authors:Liu, Huigui1 ; Zhao, Dean1, 2 ; Sun, Yueping1 ; Zhang, Jun1 ; Wu, Bo1  

  Author affiliation:1  School of Electronic and Information Engineering, Jiangsu University, Zhenjiang, China

 2  Key Laboratory of Facility Agriculture Measurement and Control Technology and Equipment of Machinery Industry, Zhenjiang, China 

  Corresponding author:Zhao, Dean 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:281-286 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:In order to meet the requirements of the periodic cutting and cleaning of aquatic plants in river crab aquaculture, a small and medium-sized intelligent automatic aquatic plant cleaning ship based on ARM was designed. Then the mechanical structure and working principle of the integration of harvest were introduced, and the ship's main structure characteristics were also put forward, such as the paddle propeller without a rudder, rotary cutting device, cut deep automatic adjustment regulator and so on. The closed loop control system of GPS navigation for the ship was designed with PD and PI control technology of intelligent mobile robot, and high precision GPS navigation control technology. The experiment results showed that the control precision of linear track could be controlled precisely within the scope of ±30 cm. On the basis of meet harvest requirement, the control system can avoid the repeat cutting or miss cutting caused by yaw effectively. 

  Number of references:12 

  Main heading:Ship propulsion 

  Controlled terms:Aquaculture  -  Cleaning  -  Closed loop control systems  -  Control systems  -  Global positioning system  -  Intelligent robots  -  Mobile robots  -  Navigation  -  Robots  -  Shellfish   -  Ships 

  Uncontrolled terms:Aquatic plants  -  Automatic adjustment  -  Control precision  -  GPS navigation  -  Intelligent mobile robot  -  Linear tracks  -  Main structure  -  Mechanical structures 

  Classification code:461.9 Biology  -  671 Naval Architecture  -  672 Naval Vessels  -  674 Small Craft and Other Marine Craft  -  675.1 Ship Propulsion (Before 1993, use code 671)  -  716.3 Radio Systems and Equipment  -  731.1 Control Systems  -  731.6 Robot Applications  -  802.3 Chemical Operations  -  821.3 Agricultural Methods 

  DOI:10.6041/j.issn.1000-1298.2014.S0.046 

  Database:Compendex

 

50. Accession number:20145200366251

  Title:Effect of components of WPC neutrase hydrolysates on iron uptake by Caco-2 cells 

  Authors:Gao, Qian1 ; Liu, Yunzhu1 ; Liang, Jianfen1   

  Author affiliation:1  College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China 

  Corresponding author:Liang, Jianfen 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:225-229 and 212 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Neutrase hydrolysis of WPC produces hydrolysates that were proved to enhance iron uptake by Caco-2 cells. The objectives of this study were to investigate effects of components of hydrolysates and digestion products of hydrolysates of neutrase-treated WPC on iron uptake. The hydrolysates of WPC treated with neutrase were separated by ultrafiltration. Effect of different components of hydrolysates on iron uptake was studied by in vitro digestion combined with Caco-2 cell model. The results showed that low molecular components (below 10 kDa) enhanced iron bioavailability significantly (p<0.05). The components of 3 kR(3~10 kDa)and 3kF(below 3 kDa) increased iron bioavailability to 23.32% and 24.23%, respectively, compared to untreated WPC (2.58%). Bioavailability of iron from ferrous sulfate added with different components of the hydrolysates was significantly associated with iron absorption (r=0.935, p<0.01), while there was no significant relation between iron dialyzability and bioavailability. The hydrolysates of neutrase-treated WPC was digested by pepsin and trypsin gradually to obtain the digestion products, and then separated into four components of different molecular weight by Sephadex G-25. Iron absorption was studied by Caco-2 cells. The results suggested that the components at molecular weight no more than 1 kDa significantly (p<0.05) increased iron absorption to 90.47% compared with 25.13% in the control, while the components with molecular weight at 1~5 kDa acted as inhibitor. 

  Number of references:21 

  Main heading:Iron 

  Controlled terms:Absorption  -  Biochemistry  -  Cells  -  Cytology  -  Ion exchange  -  Molecular weight  -  Separation 

  Uncontrolled terms:Bioavailability  -  Hydrolysates  -  In-vitro digestions  -  Investigate effects  -  Iron bioavailability  -  Molecular components  -  Separation of components  -  WPC 

  Classification code:461.2 Biological Materials and Tissue Engineering  -  545.1 Iron  -  801 Chemistry  -  801.2 Biochemistry  -  802.2 Chemical Reactions  -  802.3 Chemical Operations 

  DOI:10.6041/j.issn.1000-1298.2014.S0.036 

  Database:Compendex

 

51. Accession number:20145200366228

  Title:Experimental parameter optimization of vertical axial-flow single panicle thresher for corn 

  Authors:Zhang, Xiang1 ; Yang, Ranbing1 ; Shang, Shuqi1  

  Author affiliation:1  College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao, China 

  Corresponding author:Yang, Ranbing 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:73-79 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Three structure and operation parameters which had effect on vertical axial-flow corn single panicle thresher were optimized. The quadratic rotary orthogonal experiments were carried out. Taking linear velocity of threshing cylinder, negative pressure value of fan, moisture content of cluster as effect factors, and broken rate, impurities, loss of entrapped grains, gettering drift loss as objective function, the structure size and operation parameters were experimented and optimized design. The result showed that when the linear velocity of threshing cylinder was 4.6~5.5 m/s, the moisture content of cluster was 14.4%~15.9%, the negative pressure value of fan was 6.3 MPa, the broken rate was less than 1.1%, impurities rate was less than 0.86%, loss rate of entrapped grains was less than 1.1%, and gettering drift loss rate was less than 0.44%. This experiment's analysis could provide theory basis for the optimization design and operation parameter selection for the vertical axial single panicle threshing corn product. 

  Number of references:16 

  Main heading:Product design 

  Controlled terms:Agriculture  -  Axial flow  -  Cylinders (shapes)  -  Experiments  -  Moisture  -  Moisture determination  -  Optimization 

  Uncontrolled terms:Corn  -  Experimental parameters  -  Negative pressure value  -  Objective functions  -  Operation parameters  -  Optimization design  -  Orthogonal experiment  -  Single grains 

  Classification code:408.2 Structural Members and Shapes  -  631.1 Fluid Flow, General  -  801.4 Physical Chemistry  -  821 Agricultural Equipment and Methods; Vegetation and Pest Control  -  901.3 Engineering Research  -  913.1 Production Engineering  -  921.5 Optimization Techniques  -  944.2 Moisture Measurements 

  DOI:10.6041/j.issn.1000-1298.2014.S0.013 

  Database:Compendex

 

52. Accession number:20145200365911

  Title:Experiments on erosion resistance of bionic surface with coupling characteristics of material and morphology inspired by scapharca shell 

  Authors:Zhang, Chengchun1 ; Li, Xueli1 ; Zhang, Chunyan1 ; Zhang, Gan1 ; Wang, Xianbao1 ; Wang, Jing1, 2   

  Author affiliation:1  Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun, China

 2  Teaching Center of Basic Course, Faculty of Agriculture, Jilin University, Changchun, China 

  Corresponding author:Wang, Jing 

  Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 

  Abbreviated source title:Nongye Jixie Xuebao 

  Volume:45 

  Issue date:November 1, 2014 

  Publication year:2014 

  Pages:314-318 

  Language:Chinese 

  ISSN:10001298 

  CODEN:NUYCA3 

  Document type:Journal article (JA) 

  Publisher:Chinese Society of Agricultural Machinery 

  Abstract:Based on the characteristics of morphology and hardness distribution of scapharca shell surface, a bio-inspired model of the material coupled with pattern was proposed. The major and minor relationship and optimal combination of the main factors which affected the erosion resistance of the bio-inspired surface was obtained through experiments. Erosion resistant tests were carried out under the following test conditions: abrasive was the compound of silica sand of 80~140 mesh size and water; wear time was 30 h; and the rotating speed of 1400 r/min. Compared with the smooth testing samples, the erosion resistance of the smooth testing sample of alloying with laser, the smooth one of laser hardening, the bio-inspired model with the non-smooth pattern and the bio-inspired model of the material coupled with pattern can improve the anti-erosion performance of the samples surface. The bio-inspired model of the material coupled with pattern was the best one among all the testing samples. The order of major and minor factors affecting the relative wear rate of samples was laser hardening, amplitude, periodic and the stripe direction. Results showed that the testing sample with optimal anti-erosion performance was the one with laser surface strengthening, amplitude of 3 mm, period of 10 mm and the direction of the stripes normal to the flow direction of particles. 

  Number of references:14 

  Main heading:Surface resistance 

  Controlled terms:Bionics  -  Erosion  -  Experiments  -  Hardening  -  Morphology  -  Silica sand 

  Uncontrolled terms:Bio-inspired Models  -  Bionic coupling  -  Bionic engineering  -  Coupling characteristic  -  Hardness distribution  -  Laser surface strengthening  -  Optimal combination  -  Orthogonal experimental design 

  Classification code:407 Maritime and Port Structures; Rivers and Other Waterways  -  423 Non Mechanical Properties and Tests of Building Materials  -  483 Soil Mechanics and Foundations  -  537.1 Heat Treatment Processes  -  731.1 Control Systems  -  812 Ceramics, Refractories and Glass  -  901.3 Engineering Research  -  951 Materials Science 

  DOI:10.6041/j.issn.1000-1298.2014.S0.051 

  Database:Compendex