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检索条件"任意字段=第四届国际计算机与计算技术在农业中的应用研讨会"

共 246 条记录，以下是101-110 订阅

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Research on a Heuristic GA-Based Decision Support System for Rice in Heilongjiang Province

Research on a Heuristic GA-Based Decision Support System for...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Ran Cao Yushu Yang Wei Guo Engineering college of Northeast Agricultural University

As we know rice is the main food in *** recent years,the rapid development of agricultural decision support system provides new management methods for rice *** has been regarded as an effective analytic tool and stochastic search technique to solve large and complicated ***,traditional GA-based decision support system does not always result in good solutions and search efficiency due to random *** study presents a heuristic genetic algorithm-based decision support system to search the optimal *** method provides a robust and efficient approach for solving complex real-world *** hybrid algorithm incorporates concepts from GA and heuristic method and creates individuals in a new generation not only by crossover and mutation operations as found in GA but also by heuristic *** result of experiments reveals the proposed algorithm is more computationally effective and efficient than GA alone in terms of solution quality.

关键词： Decision support system Genetic algorithms Heuristic method

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Prediction of Irrigation Security of Reclaimed Water Storage in Winter Based on ANN

Prediction of Irrigation Security of Reclaimed Water Storage...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Jinfeng Deng Environmental Science and Engineering College Huangshi Institute of Technology

The difference of reclaimed water qualities between in summer and in winter were proved *** water derived in spring or summer could be applied irrigating in some arid region,which have been considered a rational renewable resource of *** in winter,reclaimed water would run off into river or stream in *** idea of storing it in winter and being ready for the next year's irrigation is proposed,however,the effects on crops are maintained *** processed using raw sewage,primary treated water,and secondary treated water in Gaobeidian Sewage Plant of Beijing to irrigate maize and soybean in spring and summer from 2006 to 2007,based on which the irrigation effect derived from reclaimed water of winter was predicted by *** results validated the strong relations between irrigation effect and qualities of water,which indicated the reclaimed water stored in winter was grossly similar to secondary treated water in summer for irrigation.

关键词： Reclaimed water storage irrigation security ANN

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Performance Monitoring System for Precision Planter Based on MSP430-CT171

Performance Monitoring System for Precision Planter Based on...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Lianming Xia Xiangyou Wang Duanyang Geng Qingfeng Zhang School of Agricultural and Food Engineering Shandong University of Technology

Based on full consideration of the working conditions in the filed,a monitoring system for precision planter was designed using the technology of sensor,single-chip Microcomputer and wireless *** this system,photoelectric sensor and MSP430 were used to detect the performance of the seeder-metering device and process the data *** mainly detected the miss index,multiple index,seeding amount,seeding rate,the plant spacing and other performance *** the sound-light alarm system,a indicator light was used to show the fault type and location,then the detected data and fault can be displayed on the *** order to acquire and analyze the data at realtime,a wireless transmission system based on Bluetooth was ***485 Abluetooth module was used to communicate with the host *** ensure the uniformity of drilling and sowing,a stepping motor was used to control the seeding rate in the *** results showed that reliability of the sound-light alarm system was 100%and the photoelectric sensor could detect more than 95%seeds passed it.

关键词： Monitoring system Precision planter photoelectric sensor Singlechip microcomputer Bluetooth technology Stepper motor

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Research on Fertilizer Efficiency of Continuous Cropping Greenhouse Cucumber Based on DEA Model

Research on Fertilizer Efficiency of Continuous Cropping Gre...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Xiaohui Yang Yuxiang Huang Shuqin Li Sheng Huang College of Information Engineering Northwest A&F University College of Mechanical and Electronic Engineering Northwest A&F University

Fertilizer efficiency directly affects the production of continuous cropping greenhouse *** analyzing the fertilizer efficiency is of great significance in providing decision-making support for fertilization of greenhouse *** establishing the DEA models of continuous cropping greenhouse cucumber and taking existing data samples as study objects,the problems of fertilizer efficiency in traditional fertilization,target yield fertilization and mathematical model fertilization were *** the technical efficiency,pure technical efficiency,scale efficiency and redundancy rates of the three types of fertilization methods have been obtained by analyzing the relationship of three inputs（N,PO,KO） and one output（Yield）.Through analyzing fertilizer efficiency of the three types of fertilization methods,it could get the sort by the size of mathematical model fertilization,target yield fertilization and traditional *** results showed that the method of mathematical model fertilization is more reasonable in fertilizing and the DEA method is efficient and practical in analyzing the fertilizer efficiency.

关键词： Greenhouse cucumber Fertilization Efficiency DEA method

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Study on Thermal Conductivities Prediction for Apple Fruit Juice by Using Neural Network

Study on Thermal Conductivities Prediction for Apple Fruit J...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Min Zhang Zhenhua Che Jiahua Lu Huizhong Zhao Jianhua Chen Zhiyou Zhong Le Yang College of Food Sciences Shanghai Ocean University School of Environment and Architecture University of Shanghai for Science and Technology

Based on experimentally measured values by thermal probe method,the prediction model of thermal conductivities of apple fruit juice as a function of concentration and temperature was studied by neural network *** optimal neural network was made of two hidden layers and every hidden layer had six *** prediction result shows that the optimal model could predict thermal conductivity with a mean relative error of 0.11%,a mean absolute error of 0.00054W/mK,a mean standard error of 0.00039 W/mK,the linear relationship of *** calculated precision was higher for BP neural network model than that for dual regression *** presented results were proved that this model can be used with satisfactory accuracy for the prediction of thermal conductivity of apple fruit juice.

关键词： Thermal conductivity Neural network Apple fruit juice

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Auto Recognition of Navigation Path for Harvest Robot Based on Machine Vision

Auto Recognition of Navigation Path for Harvest Robot Based ...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Bei He Gang Liu Ying Ji Yongsheng Si Rui Gao Key laboratory of Modern Precision Agriculture System Integration Research Ministry of EducationChina Agricultural University College of Information Science & Technology Agricultural University of Hebei

An algorithm of generating navigation path in orchard for harvesting robot based on machine vision was *** to the features of orchard images,a horizontal projection method was adopted to dynamically recognize the main trunks *** crossing points between the tree and the earth were detected by scanning the trunks areas,and these points were divided into two clusters on both *** to least-square fitting,two border lines were *** central clusters were gained by the two lines and this straight line was regarded as the navigation *** simulation result shows that the algorithm could effectively extract navigation path in complex orchard environment,and correct recognition rate was 91.7%.The method is proved to be stable and reliable,and with the deviation rate of simulation navigation angle compared with the artificial recognition angle is around 2%.

关键词： Navigation path Machine vision Orchard environment Image segmentation Least square-fitting

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A Precision Subsidy Management System for Strawberry Planting in ChangPing District of Beijing

A Precision Subsidy Management System for Strawberry Plantin...

引用

第四届国际计算机与计算技术在农业中的应用研讨会

作者： Zhang Chi Chen Tian'en Chen Liping National Engineering Research Center for Information Technology in Agriculture

The misuse of pesticide and fertilizer take a great pollution to the agricultural environment,which seriously affects the quality and safety of agricultural *** government put forward a series of policies of subsidy to lead the farmers to proper pesticide application and scientific *** the effect doesn't turn out as it wished to be because of the backward implementation methods and Stat *** research provides a Precision Management method for effectively managing subsidies for *** on Noncontact IC card,the authors developed a Precision Management System for agricultural related subsidies *** system was applied in one center and eleven experiment stores in ChangPing district in Beijing and solved problems like poor instruction for planting,tardy in subsidies providing and inaccurate information of stat during the strawberry growing *** this system,farmers can get the subsidies and instruction at the moment they buy agricultural materials,government can obtain the accurate data,and then adjustment the policies in time to get the desired effect.

关键词： IC card subsidy of agricultural materials precision management agricultural products safety

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A Tabu Search Approach to Fuzzy Optimization of Camellia Oleifera Fertilization

A Tabu Search Approach to Fuzzy Optimization of Camellia Ole...

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第四届国际计算机与计算技术在农业中的应用研讨会

作者： Qin Song Fukuan Zhao Yujun Zheng Department of Biotechnology Beijing University of Agriculture Institute of Software Chinese Academy of Sciences

Traditional optimization methods have been applied for years to high-yield fertilization models,which are usually well formulated by crisp coefficients and ***,real-world crop growing environment and process are often not *** this paper we establish a fuzzy mathematical model between Camellia oleifera yield and fertilization application rates,in which variation coefficients of N,P,K are described with fuzzy *** particular,we present a tabu search algorithm for finding a set of fertilization solutions in order to maximize Camellia oleifera yield based on fuzzy measures including expected value,optimistic value and pessimistic *** approach is more realistic and practical for real-world problems by taking vague and imprecise data into consideration,provides more comprehensive decision support by generating a set of high-quality alternatives,and can be applied to fertilizer decision for a variety of other crops.

关键词： fuzzy optimization tabu search Camellia oleifera

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Design of Rotary Root Stubble Digging Machine Based on Solidworks

Design of Rotary Root Stubble Digging Machine Based on Solid...

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第四届国际计算机与计算技术在农业中的应用研讨会

作者： Xinglong Liao Xu Ma Yanjun Zuo College of Engineering South China Agricultural University Key Laboratory of Key Technology on Agricultural Machine and Equipment Ministry of EducationSouth China Agricultural University

In the paper,the necessity of root stubble harvesting and recycling was put forward from the perspective of biomass energy *** accomplish mechanized harvesting on root stubble,a rotary digging machine was designed based on parametric modeling software ***,parts were built under entity modeling module,and then assembled to 4 main mechanisms in assembling ***,mechanisms including frame,transmission mechanism,suspension mechanism and digging mechanism were assembled together to establish the whole prototype on which interference checking was *** manual change of the transmission chain's installation position,the digging mechanism was able to shift between reverse and forward rotation according to different soil ***,relevant 2-D engineering drawings were generated for *** paper provides methodological reference for the design of similar machines and preparation for further simulation and analysis of the designed models.

关键词： Root stubble Rotary digging machine Solidworks Virtual design

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Design and Experiment of Onboard Field 3D Topography Surveying System

Design and Experiment of Onboard Field 3D Topography Surveyi...

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第四届国际计算机与计算技术在农业中的应用研讨会

作者： Mingming Guo Gang Liu Xinlei Li Key Laboratory of Modern Precision Agriculture System Integration Research Ministry of EducationChina Agricultural University

Laser-controlled land leveling system can obviously improve the planeness of the field and enhance the efficiency of *** 3D topographic information was needed for project design and evaluation of laser land *** order to obtain the topographic information efficiently,an onboard field 3D topography surveying system was *** surveying system consisted of a measuring laser receiver,a GPS receiver,a controller and a hydraulic *** topographic measurement,the system could also achieve laser land *** measuring laser receiver was used to obtain the elevation and the GPS receiver was employed to obtain the longitude and latitude *** data was fused in the controller to get the 3D topographic *** experiments were carried out in different speed and compared with the data from the fixed-point surveying *** result showed the surveying system had a good consistency with the fixed-point surveying method in slower speed.

关键词： Laser-controlled Land Leveling Topographic Surveying GPS

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