The design and implementation of virtual laboratory platform in internet

With the development of the modem long-distance education, it is very important to study the virtual laboratory, which is a key part of the long-distance education resource. This paper introduces the project of architecture and implementation of the virtual laboratory platform to overcome the shortage of the current virtual laboratory. It also illustrates the key design and implementation technologies of its server and client in details. There are some new features in our virtual laboratory platform: (1) It is base on the general virtual laboratory and use component to provide the concrete fscilities to construct laboratories in various domains. (2) It provides visual tools to design experimental process. (3) It introduces and creates the object of experimental process dynamically, and just downloads relative implement documents and resource documents according to the requirements of the clients. As the result, it will resuce the flow of network. (4) It uses multithead technique to improve implement efficiency. (5) Laboratory equipments, such as algorithms and instruments, can be developed with component design to improve the development efficiency, to reuse the software, and to expand the function of virtual laboratory easily. (6) It uses Java in client, so it is independent of platform, Safe and strong. (7) It makes use of CORBA to integrate various objects and to accomplish distribute process.