Study On Key Technologies In Teaching Reasource Shareing Environment Based On Grid

Network teaching in China gets a rapid development within the scope of china,the majority of colleges and universities have already built their own network teaching platform system,and have achieved a good result,but there are some questions,as a lack of resources cooperation in a wide range.The emergence of grid technology brings us the method for sharing teaching resource.It is another major scientific and technological progress after the Internet,whose goal is the integration of the Internet into a huge super-large-scale computer system in heterogeneous and distributed network environment, achieves computing resources,storage resources to share,and eliminate resource islands.It is very necessary and meaningful for researching into how to apply grid technology in the teaching resource sharing based on the network teaching platform which has been founded by colleges.Through the research of the university,Construct a J2EE-based network teaching platform system,divide it into presentation layer,business logic layer,resource management layer,data layer,the business processing and database operations were separated,expound the concrete realization of the process by levels,use a variety of means guarantee the security of the system,lay the foundation for teaching resource sharing environment based on the grid.In combination with teaching resources grid' functions,have designed the architecture of teaching resources grid after researching on the grid architecture,characteristic and its development,divide it into teaching resource layer,grid resource services layer,grid service interface layer and application layer four levels to address the heterogeneous system,use UML technology to get its use case diagram and sequence diagram.In combination with autonomy,heterogeneous,dynamic and management of multiple characteristics in teaching resource grid environment,go to carrying out in-depth exploration of resource finding,take the initiative finding and passive finding to ensure the realization of its functions,and use tree structure and list layer to display the resource in the initiative finding,Thus,it facilitates the operation of the users and improves the service quality of teaching resources sharing.Construct a grid-based teaching sharing environment based on the existing network teaching platform through having application of OGSA-DAI,enables users to access the entire grid node teaching resource,and compare it with Realcourse.