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检索条件"任意字段=第一届国际计算机与计算技术在农业中的应用研讨会"

共 280 条记录，以下是261-270 订阅

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THE CONSTRUCTION OF SMALL TOWN INFORMATION PORTAL USING OPEN SOURCE SOFTWARE

THE CONSTRUCTION OF SMALL TOWN INFORMATION PORTAL USING OPEN...

引用

第一届国际计算机与计算技术在农业中的应用研讨会

作者： Cheng Peng Jing Li Jianwei Yue Qiaozhen Guo Institute of Resources Technology and Engineering Institute of Resources ScienceBeijing Normal University

Along with the development of small towns,traditional or common methods of urban informatization construction are not fit for small *** it's essential to bring forward an appropriate *** studying on the latest open source portal software uPortal,the paper discussed the application of personalized service,portal technology and information integration technology in informatization construction of small ***,the design and realization of the information portal and a portal website of small towns,which achieve the management and sharing of information in small towns,were presented.

关键词： open source software portal technology uPortal small town information portal

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ANALYSIS AND TESTING OF WEED REAL-TIME IDENTIFICATION BASED ON NEURAL NETWORK

ANALYSIS AND TESTING OF WEED REAL-TIME IDENTIFICATION BASED ...

引用

第一届国际计算机与计算技术在农业中的应用研讨会

作者： Yan Shi Haibo Yuan Anbo Liang Chunmei Zhang Architecture and engineering college Qingdao Agricultural University College of Engine & Electronic Engineering Qingdao Agricultural University International Intercommunion School Qingdao Agricultural University

Contrasting the two green strength genes of soil,wheat,corn,and the weed,the paper designed a system to identify the weed from the *** used the2G-R-B and BP neural network,with the help of pixel-position-histogram diagram,to calculate the area and position of *** result showed that it could identify the weed from the field and crop with an accuracy of 93%.The program gave the result that running time of identifying weed in wheat field was 273.31 *** far as the corn was concerned,the time was 321.94 ms,In a word,the system can satisfy the request of real-time.

关键词： variable spray weed identify picture disposal visual c++

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HEAT LOSS THROUGH COVERING LAYER

HEAT LOSS THROUGH COVERING LAYER

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第一届国际计算机与计算技术在农业中的应用研讨会

作者： Yi Zhang Chengwei Ma Junfang Zhang Midao Qin Ruichun Liu Director of Key Lab of Agricultural Bio-environment Engineering Ministry of Agriculture

A model of heat transfer through greenhouse covering materials was developed in this *** influences of the thermal properties of covering materials,the construct parameters of greenhouse and the environment inner and outer of greenhouse were completely considered in the *** transfer flux density through covering layer can be simulated and forecasted by using this *** simulated values of heat transfer flux density through covering layer were in accordance with the values got from some *** model can be used for many purposes,such as greenhouse design,analysis and control for thermal environment in greenhouse.

关键词： greenhouse covering material heat transfer heat radiation theoretical model

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AN OPTIMIZATION GENETIC ALGORITHM FOR IMAGE DATABASES IN AGRICULTURE

AN OPTIMIZATION GENETIC ALGORITHM FOR IMAGE DATABASES IN AGR...

引用

第一届国际计算机与计算技术在农业中的应用研讨会

作者： Changwu Zhu Guanxiang Yan Zhi Liu Li Gao Department of Computer Science Hua Zhong Normal University School of Information Management Wuhan University Wuhan Junxie Shiguan School

Data Mining is rapidly evolving areas of research that are at the intersection of several disciplines,including statistics,databases,pattern recognition,and high-performance and parallel *** this paper,we propose a novel mining algorithm,called ARMAGA(Association rules mining Algorithm based on a novel Genetic Algorithm),to mine the association rules from an image database,where every image is represented by the ARMAGA *** first take advantage of the genetic algorithm designed specifically for discovering association *** we propose the Algorithm Compared to the algorithm in,and the ARMAGA algorithm avoids generating impossible candidates,and therefore is more efficient in terms of the execution time.

关键词： image AN OPTIMIZATION GENETIC ALGORITHM FOR IMAGE DATABASES IN AGRICULTURE

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GRASS COVER CHANGE MODEL BASED ON CELLULAR AUTOMATA

GRASS COVER CHANGE MODEL BASED ON CELLULAR AUTOMATA

引用

第一届国际计算机与计算技术在农业中的应用研讨会

作者： Shuai Zhang Jingyin Zhao Linyi Li Digital Agricultural Engineering Technological Research Center Shanghai Academy of Agricultural Sciences

This research attempt to establish a grass cover change model based on cellular *** took the relationship between elevation,slope,aspect,settlement,road,water system and grass cover change as the foundation of the model,the dynamic progress of grass cover change was expressed by using cellular automata,the grass cover change model based on the basic geographical control condition which has been mentioned in above paragraph was *** grass cover state of Madoi County in 2003 was simulated,and has been compared with the actual state of Madoi County *** was found that the grass cover change model has a high *** value of kappa index has reach 0.8801.

关键词： cellular automata grass cover change

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STUDY ON AUTHORIZATION MANAGEMENT MODEL OF ONE-STOP OFFICE SYSTEM

STUDY ON AUTHORIZATION MANAGEMENT MODEL OF ONE-STOP OFFICE S...

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第一届国际计算机与计算技术在农业中的应用研讨会

作者： Jianwei Yue Hongchun Cai Luyao Chen Wei Zhuang College of Resources Science and Technology Beijing Normal University Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs &Ministry of Education Beijing Normal University

An authorization management model named five-layer-two-section is proposed through studying on problems of authorization management model and role network *** model inherits the thought of role network model,and at the same time it expands the role network model by putting website into management model,so as to more accurate authority *** it puts user and post into one system,and role,activity,website into *** model,combining rough regulation and meticulous adjustment,integrity and flexibility,could greatly decrease the complexity of the authorization management and the probability of making mistake.

关键词： authorization management one-stop office system RBAC

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DESIGN OF CONTROL SYSTEM OF LASER LEVELING MACHINE BASED ON FUSSY CONTROL THEORY

DESIGN OF CONTROL SYSTEM OF LASER LEVELING MACHINE BASED ON ...

引用

第一届国际计算机与计算技术在农业中的应用研讨会

作者： Yongsheng Si Gang Liu Jianhan Lin Qingfei Lv Feng Juan Agriculture University of Hebei College of Information and Electrical Engineering China Agricultural University Key Laboratory of Modern Precision Agriculture System Integration Research Hangzhou Dianzi University

The control system of laser leveling machine was redesigned and tested to improve the performance and decrease the *** this paper,the control system of the machine which contains transmitter,receiver and controller was *** receiver had silicon photoelements as photoelectric sensors.A kind of light filter was designed which was composed of red color optical glass and interference *** control theory was applied in the controller *** experiments conducted in fields showed that the controller and the laser receiver developed matched *** control system worked well and the leveling accuracy was improved.

关键词： fussy control leveling machine laser-controlled

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SECURE PRODUCTION OF FARM PRODUCE-ORIENTED MANAGEMENT AND SPATIAL DECISION-MAKING SYSTEM FOR PRODUCING AREA

SECURE PRODUCTION OF FARM PRODUCE-ORIENTED MANAGEMENT AND SP...

引用

第一届国际计算机与计算技术在农业中的应用研讨会

作者： Yan Wang Yuchun Pan Bojie Yan Anyun Li Jihua Wang School of Geography Beijing Normal University National Engineering Research Center for Information Technology in Agriculture School of Information and Electrical Engineering China Agricultural University

To address security of farm produce's quality,using object-oriented technologies to build multi-purpose database,it meets the current and future data needs of a variety of operational ***,base on WebGIS,to establish management and decision-making system for producing area,This system could be implement digital management for the entire agricultural park,and evaluate individual plots momentarily,can also provide accurate results in the decision-making fertilizer.

关键词： Secure production spatial decision-making WebGIS multi-purpose database environmental estimation for habitat

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TOWARDS DEVELOPING A WEB-BASED GAP MANAGEMENT INFORMATION SYSTEM FOR CUCUMBER IN CHINA

TOWARDS DEVELOPING A WEB-BASED GAP MANAGEMENT INFORMATION SY...

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第一届国际计算机与计算技术在农业中的应用研讨会

作者： Jianping Qian Ming Li Xinting Yang Xuexin Liu Jihua Wang National Engineering Research Center for Information Technology in Agriculture College of Information and Electrical Engineering China Agricultural University

The integrated management of Good Agricultural Practices(GAP) for cucumber(Cucumis sativus L.) plays a key role in guaranteeing the high quality and safety of cucumber *** paper describes an attempt to develop a web-based GAP management information system for *** applying the system methodology and mathematical modeling technique to analyzing the dynamic relationships between control point of GAP and produce process of cucumber,self-assessments algorithm was *** on the algorithm,Web-based GAP management information system for cucumber(Cucumber-GAPS) with the functions of data manage,criterion query,GAP self-check,model manage and so on was designed with the web structure of Browse/Server,and it has been applied successfully in China.

关键词： cucumber Good Agricultural Practices(GAP) self assessment management information system

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SOIL CLASSIFICATION VIA MID-INFRARED SPECTROSCOPY

SOIL CLASSIFICATION VIA MID-INFRARED SPECTROSCOPY

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第一届国际计算机与计算技术在农业中的应用研讨会

作者： Raphael Linker Faculty of Civil and Environmental Engineering Technion-Israel Institute of Technology

The need for rapid and inexpensive techniques for soil characterization has led to the investigation of modern technologies,and in particular those based on reflectance *** near-infrared has been traditionally used,midinfrared in the 400-4000 cm-1 range is becoming increasingly common due to the specificity of the absorbance bands in this spectral *** present work discusses two methods based on mid-infrared spectroscopy for soil classification:attenuated total reflectance(ATR) and photoacoustic *** ATR method requires a soil sample close to water saturation,and as a result only the 800-1600 cm-1 interval of the spectrum yields a useful *** ATR soil spectra consist mostly of several broad bands in the 800-1200 cm-1 region and a calcium carbonate band around 1450 *** comparison,photoacoustic measurements are conducted with air-dried samples,and the photoacoustic spectra exhibit a larger number of clearly-defined *** methods were tested on data sets containing over 100 samples of various soils commonly used in Israeli *** analysis was conducted by wavelet decomposition and neural network *** good classification performances were achieved,with correct classification rates of the validation samples typically above 95%.

关键词： Fourier transforms infrared(FTIR) attenuated total reflectance(ATR) photoacoustic spectroscopy(PAS) wavelets neural networks

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