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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"

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Implement of Fuzzy Control for Greenhouse Irrigation

Implement of Fuzzy Control for Greenhouse Irrigation

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： Wenttao Ren Quanli Xiang Yi Yang Hongguang Cui Lili Dai College of Engineering Shenyang Agricultural University

By adopting the fuzzy control theory,a greenhouse irrigation automatic control system has been designed with the characteristic of accurate of the nonlinear,time-variability,long time delay and the characteristic of accurate mathematic model being hard to *** some basic experiments,the basic domain of input and output of the fuzzy controller were *** variables that were used to control the each connect duration of electromagnetic *** control can be realized by MSP430F133 MCU control system with usage of the time *** the action of fuzzy control,prototype field experimental results showed that first-order inertial character performed by the system with the constant —3540s,which was no *** simple structure,low price and high reliability,the accuracy of the system meets irrigation technical requirements of crops in greenhouse.

关键词： fuzzy control MSP430F133 time constant subsurface drip irrigation

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A Detection Method of Rice Process Quality Based on the Color and BP Neural Network

A Detection Method of Rice Process Quality Based on the Colo...

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： Peng Wan Changjiang Long Xiaomao Huang College of Engineering Huazhong Agricultural University College of Biological and Agricultural Engineering Jilin University

This paper proposed a detection method of rice process quality using the color and BP neural network.A rice process quality detection device based on computer vision technology was designed to get rice image,a circle of the radius R in the abdomen of the rice was determined as a color feature extraction area,and which was divided into five concentric sub-domains by the average area,the average color of each sub-region H was extraction as the color feature values described in the surface process quality of rice,and then the 5 color feature values as input values were imported to the BP neural network to detection the surface process quality of *** results show that the average accuracy of this method is 92.50%when it was used to detect 4 types of rice of different process quality.

关键词： Process quality Rice color BP neural network Rice

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A Method of Deduplication for Data Remote Backup

A Method of Deduplication for Data Remote Backup

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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： Jingyu Liu Yu-an Tan Yuanzhang Li Xuelan Zhang Zexiang Zhou School of Computer Science and Technology Beijing Institute of Technology School of Computer Science and Engineering Hebei University of Technology

The paper describes the Remote Data Disaster Recovery System using Hash to identify and avoid sending duplicate data blocks between the Primary Node and the Secondary Node,thereby,to reduce the data replication network bandwidth,decrease overhead and improve network *** both nodes,some extra storage spaces(the Hash Repositories) besides data disks are used to record the Hash for each data block on data *** extend the data replication protocol between the Primary Node and the Secondary *** the data,whose Hash exists in the Hash Repository,is duplication,the block address is transferred instead of the data,and that reduces network bandwidth requirement,saves synchronization time,and improves network efficiency.

关键词： Disaster Recovery Deduplication Hash Duplicate Data

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A Localization Algorithm for Sparse-Anchored WSN in Agriculture

A Localization Algorithm for Sparse-Anchored WSN in Agricult...

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： Chunjiang Zhao Shufeng Wang Kaiyi Wang Zhongqiang Liu Feng Yang and Xiandi Zhang Beijing Research Center for Information Technology in Agriculture

The location information is very crucial for the sensing data in modern ***,positioning errors and sparse anchors are two key problems that should first be solved for the localization of the sensor *** proposed a novel algorithm to tackle with these *** the system of adjacent anchor distance equations is ill,a minimized-stress search algorithm（MSS） can decrease positioning error greatly.A collaborative sparse-anchored scheme（CSA） has an excellent positioning effect on low density of anchor,specifically on marginal sensor *** experimental result verified validity and accuracy of the *** improved feasibility and cost of WSN positioning technique,significantly.

关键词： WSN localization Sparse anchors Multi-hop cooperation

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Study on Water Resources Optimal Allocation of Irrigation District and Irrigation Decision Support System

Study on Water Resources Optimal Allocation of Irrigation Di...

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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： Liang Zhang Daoxi Li Xiaoyu An Zhengzhou University North China University of Water Resources and Electric Power

This paper develops the system of optimal allocation of water resources in irrigation district and irrigation decision-making support which integrates technologies of decision-making support,information management,information search and so *** has the multi-function of water production function calculation,crop water requirement calculation,water resources optimal allocation and real-time amending the decision of *** system integrates the experience of experts with computer technology to guide farmers to irrigate in a proper way,for which the limited water resources can produce a marked effect on irrigation,so irrigation district management and efficiency are improved.

关键词： Optimal allocation of water resources irrigation district watersaving irrigation decision support system

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Electronic Agriculture Resources and Agriculture Industrialization Support Information Service Platform Structure and Implementation

Electronic Agriculture Resources and Agriculture Industriali...

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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： Zhao Xiaoming Ningxia Academy of Agriculture and Forestry Sciences

Agriculture resources and agriculture industrialization support information service platform is an important part of Agriculture affair support platform of west part national area of ***,a key projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan *** system is designed as a 3 layers *** support subsystem is the base *** middle layer contains GIS model and general reuse models;the upper layer is affair process interface and the entire manager *** of the country situation of China west,nature village is setup as a information manage *** in the village act as the registered *** government layer monitor the system running and distribute their index independently,system managed in the province *** implement under Microsoft Windows server 2003,running as a Server/Browser style.

关键词： service Electronic Agriculture Resources and Agriculture Industrialization Support Information Service Platform Structure and Implementation Service

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Study on Regional Agro-ecological Risk and Pressure Supported by City Expansion Model and SERA Model——A Case Study of Selangor,Malaysia

Study on Regional Agro-ecological Risk and Pressure Supporte...

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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： Xiaoxia Shi Yaoli Zhang Cheng Peng Beijing Key Laboratory of Logistics Systems and Technology School of Logistics Beijing Wuzi Universtiy National Engineering Research Center for Information Technology in Agriculture

This study revealed the influence of city expansion on the agro-ecological risks through the analysis and prediction of city expansion in different periods and study on the change of risk and pressure on the regional agricultural *** city expansion of Selangor,Malaysia(as a case) was predicted based on relevant spatial and attribute data as well as simulation prediction models of city ***,the ecological risk and pressure in the study area as well as on regional agricultural land use was assessed through the realization of factors of SERA *** results showed that the risk and pressure on agricultural land use was consistent with the level of the *** the expansion of urban area,the ecological risk on agricultural land use in the study area became *** risk and pressure on agricultural land use with city expansion was well analyzed with SERA model.

关键词： City expansion Ecological risk Remote sensing SERA model

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Research on Docking of Supply and Demand of Rural Informationization and "Internet Digital Divide" in Urban and Rural Areas in China

Research on Docking of Supply and Demand of Rural Informatio...

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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： Zhongwei Sun Yang Wang Peng Lu Department of Resource & Environment Shijiazhuang College Institute for Tourism Studies Hebei Normal University

Based on the cognition of "internet digital divide" from five respects in urban and rural areas in China,the paper analyzes the key links of relieving the question of "internet digital divide" in urban and rural areas and the construction of rural *** research discovers that improving the human quality is the most important factor in solving the problem of the rural areas residents to contact network,and increasing the farmers' income is the key to raise internet popularity rate of the rural areas,and the mobile phone and construction of information service centre of various forms are important ways for the rural areas residents to contact *** paper also proposes that the key point of the following work of rural informationization in China is to realize the docking of supply and demand through enhancing government information supplies and increasing information demands of rural areas.

关键词： Urban and rural areas Internet digital divide Rural informationization Docking of supply and demand China

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Discrimination between Mature Vinegars of Different Geographical Origins by NIRS

Discrimination between Mature Vinegars of Different Geograph...

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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： Huishan Lu Zhengguang An Huanyu Jiang Yibin Ying College of Mechanical Engineering & Automatization North University of China College of Biosystems Engineering and Food Science Zhejiang University

The feasibility of near infrared spectroscopy(NIRS) for discrimination between mature vinegar of different geographical origins(Taiyuan and Qingxu,China) is presented in this *** spectra were collected in transmission mode in the wavelength range of 800-2500 *** analysis models were developed based on Principal Component Analysis(PCA) and Discriminant Analysis(DA).The prediction performance of calibration models in different wavelength range was also *** best models gave a96.3%classification of mature vinegars of the two geographical origins in the range of 800-2500 *** results demonstrated that NIRS techmque could be used as a rapid method for classification of geographical origin of mature vinegars.

关键词： origin Discrimination between Mature Vinegars of Different Geographical Origins by NIRS

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Progress of China Agricultural Information Technology Research and Applications Based on Registered Agricultural Software Packages

Progress of China Agricultural Information Technology Resear...

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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： Kaimeng Sun Laboratory of Digital Agricultural Early-warning Technology of Ministry of Agriculture of China Institute of Agricultural Information of Chinese Academy of Agricultural Sciences

By using classified agricultural software products registered during last 15 years from 1994 to 2009,the author analyzed data and statistics in order to look at growth in number of the agro-software packages,their application areas,and research and development organizations,as well as their contribution to the agricultural IT industry in *** on the analysis,the article also assessed current agricultural IT sector development and provided some suggestions on further progress.

关键词： Agricultural Information Technology Applications Agricultural Modernization

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