The Research Of Grid Applications In The JinLin Digital Agricultural Information Website

In recent years, our provinces, cities are actively agricultural information website, through the website construction to increase agricultural modernization level. But the number of Chinese agricultural website construction and follow the requirements of The Times scale still, most local web content, column not updating the information set is monotonous, information repetition, lack of diversity, the website each other between the isolation, decentralized management, causing some agricultural information website visitors and utilization rate is not high, "resource hunger" phenomenon is still widespread. Network of resources and services provided by has not been fully play and use, so how to achieve real sense of sharing resources?The grid is in recent years international a new technology, it will appear to distributed, heterogeneous can be realized, mass data resource sharing, make "information resource island" no longer lonely. The grid technology has distribution and heterogeneous, sharing and integration, autonomy and dynamic, abstract and virtual characteristics. Based on Web services technology grid, can be in different network environments of agricultural information release and sharing. At the same time, the grid information service function convenient information resources, improving the information resources of the query utilization. Make all related personnel can free to share a networks offer integrated environment, fundamentally to provide "one-stop service", improving and perfecting the agriculture information web system. This thesis mainly research content is the grid technology in the digital agriculture information web site, in order to solve the application field of current agricultural information resource prevailing "information island" phenomenon. Specific research content as follows:1.This paper expounds the grid technology system concept and basic theory. Research and analysis in the field of the grid technology Some important theory, mainly including five layer hourglass system structure, industry recognized Service oriented grid architecture are discussed, GT4, GT4 and OGSA,WSRF, Web Service are discussed, the relation of theoretical knowledge.2. Detailed analysis of the information service based on GT4 grid platform building, in practice combined with a specific example summarized grid services and applications of the development process.3. In view of the present agricultural information website construction in light of the existing problems, analyses and compares two different grid system structure, and on the basis of digital agriculture based on the grid technology information websites system needs analysis, planning out the corresponding grid models and website the overall structure, realized the function module detailed website system design and database design. Emphatically analyzes the grid technology in information service module design, and the information service module made overall analysis and the overall structure design. 4. Combined with OGSA model and WSRF specification, to the grid technology in the digital agriculture information website application has made the detailed analysis, completed grid information service module design and implementation, specific include:development tools and programming model, WS resource description, create and calls, WS resources the realization of inform mechanism and the realization of information service.