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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81-90 订阅

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Design for Real-Time Monitoring System of High Oxygen Modified Atmosphere Box of Vegetable and Fruit for Preservation

Design for Real-Time Monitoring System of High Oxygen Modifi...

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： Zhanli Liu Congcong Yan Xiangyou Wang Xiangbo Han School of Agriculture and Food Engineering Shandong University of Technology College of Computer Science and Technology Shandong University of Technology

According to the disadvantages of traditional box for preservation,including low oxygen and high carbon,a new control system of high oxygen is *** paper presents the design and implementation method in this *** system combines traditional PID control with fuzzy control which can adjust parameters of the whole system *** box can control the dynamic content of oxygen and carbon dioxide,and monitor nitrogen flow,temperature and humidity real-timely so that preservation time can be *** also can collect and keep the data of the dynamic content of oxygen and carbon dioxide which suits for fruit and vegetable for *** former environment can be reappeared when *** system works steadily and has strong functions.

关键词： High oxygen Modified atmosphere box Real time monitor Design

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The Monitoring System of Water Environment Based on Overlay Network Technology

The Monitoring System of Water Environment Based on Overlay ...

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： Xueliang Fu Changyou Li Buyu Wang Honghui Li Hailei Ma Dongnan Zhu Inner Mongolia Agricultural University

At present,although methods of automatic,periodical manual data collection have been adopted in some areas,there are many problems existing in these *** paper proposes a new framework for online monitoring of water environment based on overlay network ***,we build the multi-level overlay network,which consists of the GPRS networks,mobile networks and internet *** this,a multi-dimensional data cube for water environment is established using the ETL process with the input of complex heterogeneous data ***,the framework of data center is established for on-line early warning of water environment and data analysis and *** framework has been put into use in Wuliangsuhai for the on-line real-time water monitoring *** results show that the overlapping network architecture is effective and on-line analysis and early warning of heterogeneous data is efficient.

关键词： WSN Overlay network ETL Multidimensional data cube

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Impact of Hydraulic Conductivity on Solute Transport in Highly Heterogeneous Aquifer

Impact of Hydraulic Conductivity on Solute Transport in High...

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： Kaili Wang Guanhua Huang College of Water Conservancy and Civil Engineering China Agricultural University Chinese-Israeli International Center for Research and Training in Agriculture China Agricultural University

The impact of hydraulic conductivity on solute transport process in a highly heterogeneous aquifer was analyzed using the Monte-Carlo *** logarithm of the hydraulic conductivity(lnK) of aquifer was considered as a non-stationary field with increments being a truncated fractional Levy motion(fLm) generated using the SRA3 DC *** and MT3 DMS code were used to solve the flow and solute equations,*** indicate that larger C lead to a more heterogeneous hydraulic conductivity *** C increases,solute plumes show more significant anomaly with sharper leading edge and wider tailing *** solute plume extends and its second spatial moments increase as C increases,while the first spatial moments of the solute plume are independent of C *** longitudinal macrodispersivity is scaledependent and increases as a power law function of *** C results in an increase in longitudinal *** was concluded that the nature of transport process is highly dependent on the heterogeneity of the hydraulic conductivity field.

关键词： hydraulic conductivity transport Monte-Carlo heterogeneous moments

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Design of Fuzzy Drip Irrigation Control System Based on ZigBee Wireless Sensor Network

Design of Fuzzy Drip Irrigation Control System Based on ZigB...

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： Xinjian Xiang College of Automation & Electrical Engineering Zhejiang University of Science and Technology

To improve agricultural water resources' utilization,crop's automatic,locate,time and appropriate drip irrigation is a good *** this paper,an automatic control drip irrigation system based on ZigBee wireless sensor network and fuzzy control would be *** uses CC2430 for wireless sensor network node design,collecting soil moisture,temperature and light intensity information and sending the drip irrigation instructions by the wireless *** put this three soil factors input fuzzy controller,created fuzzy control rule base and finished crop irrigation time fuzzy *** paper mainly describes system's hardware structure,software design and working *** system with the characteristics of economical,reliable communications and high accuracy control,could improve agricultural drip irrigation water using efficiency and the automation level.

关键词： Drip irrigation ZigBee wireless sensor network Fuzzy controller Drip irrigation automation

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Implementation of Agro-environmental Information Service System Based on WebGIS

Implementation of Agro-environmental Information Service Sys...

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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： Lin Peng Linnan Yang Limin Zhang College of Computer Engineering and Science Shanghai University College of Basic Science & Information Engineering Yunnan Agricultural University

Faced to the present agro-environmental information features,there exist several difficulties to acquire and control the agricultural environment information,such as the scattered information with spatio-tempel traits,the methods of quantification and the huge data *** paper constructed an agro-environmental information service system based on the spatial database,computer network and geographic information system(GIS) *** system was applied in Jianshui County,Yunnan to implement the system functions including the collection,storage,analysis,visual output and intelligent *** system with these functions applied technical support for Jianshui county to improve the abilities both in local agricultural products and environmental *** it provided a precedent for other Counties in Yunnan to construct agricultural environmental information system.

关键词： WebGIS Agricultural environment Information service system Spatial database

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Dynamic Modeling on Nitrogen Assignment in Tobacco

Dynamic Modeling on Nitrogen Assignment in Tobacco

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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： Peng Zhao Yuanyuan Shi Xinming Ma Shuping Xiong Henan Key Laboratory for Regulating and Controlling Crop Growth and Development Henan Agricultural University

Many external and internal studies in based on the relevant literature and consult to tobacco experts,based on the experimental research of the years between 2004 and 2005,the basic model of soil-N of distribution was developed after analysising the content of nitrogen in the whole plant of *** model is designed to simulate dynamically absorption and distribution of nitrogen for *** diversification of nitrogen in tobacco is exhibited dynamically in the form of curve which originates from the software of Visual Basic *** result showed that the simulated value of nitrogen content is not remarkably different from the measured value in root,stem and leaf of tobacco in the level of 0.05,and the simulation value of nitrogen content fit the measured value very well in the *** proveds a concerning modulus of0.9934 that the 1:1 graphical comparison between simulation value and measured data of nitrogen content in tobacco *** simulated and the measured agreed *** model helps to forecast and conduct the management of nitrogen fertilizer in tobacco field.

关键词： Tobacco Nitrogen Assignment Model

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Design of Agent-Based Agricultural Product Quality Control System

Design of Agent-Based Agricultural Product Quality Control S...

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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： Yeping Zhu Shijuan Li Shengping Liu E.Yue Laboratory of Digital Agricultural Early-warning Technology of Ministry of Agriculture of China Institute of Agricultural InformationCAAS

Aiming at the problems existed in agricultural product quality control,management and traceability such as the considerable influence of human factors,weak ability of handling emergencies and lacking of support of intelligent key technologies,this study explores the application of agent theory,method and technique to solve the problems of process control,traceability,intelligent information watching and information technology application to emergency reaction conditioned on the general characteristics from production to *** this study agent application and development method will be put *** means of investigating its communication and cooperative mechanism,we design the agent-based universal system framework for quality control of agricultural *** to production and processing characteristics of different agricultural products,corresponding controlling unit and condition are increased to adapt to the special aim.

关键词： Agent Agricultural product Quality control

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An Efficient and Fast Algorithm for Mining Frequent Patterns on Multiple Biosequences

An Efficient and Fast Algorithm for Mining Frequent Patterns...

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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： Wei Liu Ling Chen School of Information Technology Nanjing Xiaozhuang University Institute of Information Science and Technology Yangzhou University National Key Lab of Novel Software Tech Nanjing University

Mining frequent patterns on biosequences is one of the important research fields in biological data *** frequent pattern mining algorithms may generate large amount of short candidate patterns in the process of mining which cost more computational time and reduce the *** order to overcome such shortcoming of the traditional algorithms,we present an algorithm named MSPM for fast mining frequent patterns on *** on the concept of primary patterns,the algorithm focuses on longer patterns for mining in order to avoid producing lots of short *** by using prefix tree of primary frequent patterns,the algorithm can extend the primary patterns and avoid plenty of irrelevant *** results show that MSPM can achieve mining results efficiently and improves the performance.

关键词： Biological sequence Frequent Pattern Mining Primary Patterns

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Development of Dairy Cattle Registration and Herd Management System

Development of Dairy Cattle Registration and Herd Management...

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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： Hongchao Wu Xibo Qiao Xin Luan Biao Li Zhongle Chang Jinghe Tan Xinzhong Fan College of Animal Science & Technology Shandong Agricultural University Shandong University of Traditional Chinese Medicine

In order to meet the requirement of dairy cattle breeding and modern cattle farm management,the dairy cattle registration and herd management system was programmed with Visual FoxPro9.0,which can run on Windows9X/Me/NT/2000/XP,to fit the current implemented Canadian dairy cattle DHI recorders and 9-point linear comprehensive *** on data collection and analysis of basic herd information and individual information on milk production,reproductive performance,body type score,health status,feeding and progeny performance,the system can be used for herd management,cow evaluation and breed registration,intelligent mating selection and suggestion for improving farm *** application in several different scale farms shows it can improve the efficiency of farms management and cattle breeding significantly.

关键词： Dairy cattle Registration Management software Visual FoxPro

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Motion Blurring Direction Identification Based on Second-Order Difference Spectrum

Motion Blurring Direction Identification Based on Second-Ord...

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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： Junxiong Zhang Fen He Wei Li College of Engineering China Agricultural University Chinese Academy of Agricultural Engineering

An identification method for uniform linear motion blurring direction based on second-order difference spectrum was *** power spectrum of the blurred image was calculated after the Laplace second-order difference,and then the power spectrum was processed by the homomorphic filtering and the circular low-pass *** blurring direction was attained by linear fitting of the frequency points with highest amplitude selected from the spectrum *** experiments were carried out by using the blurred images which were simulated by the Lenna standard images with the blur extent being20 pixels,and the mean square error of detection were 1.32° without additional noise and 2.27° with Gauss noise that the variance was *** using the real blurred images,the accuracy of the detection was-0.54°.This proposed method is proved to be available for motion blur of random plane direction and adaptable for noise.

关键词： Image processing Direction identification Second-order difference Motion blur Fourier spectrum

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