Function Extension Of Virtual Teaching Experiment System Under Network Environment

Along with the development of information technology, as an effective complement oftraditional experiment for teaching, virtual experiment has become the important means ofenhancing practice and improving the quality of teaching. The research and development ofVirtual Teaching Experiment System also becomes mature. However, the existing systemsmostly concentrate on simulating true experiment platform; the function extension beyondtrue experiment platform needs more works to do. By implementing several network func-tion such as Operation Replay, Experiment Demonstration and Monitoring and OperationCooperation,the virtual teaching experiment system can be more perfect and more conve-nient.Operation Replay and Experiment Demonstration and Monitoring belong the same sys-tem.The first one is kernel, and the second one is application of the first one. The operationreplay function can make users'operation ?ow in virtual experiment system recur again andagain; users can save their own operation ?ow and then replay it in system.By analyzingthe characters of the MFC framework, Message is used as operation unit,and the operation?ow is optimized by distinguishing Effective Message and Useful Message;finally,implementOperation Replay based on its feasibility. The experiment demonstration and monitoringfunction is extended network application based on Operation Replay. It can let teachers candemonstrate experiment to all students using the system real-timely. It also allow studentsjoin demonstrating action dynamically with keeping operation ?ow complete.In addition, itmakes teachers monitor every student's operation ?ow and final result.By investigating theload problem deeply give a arithmetic which used to reach the state of load most equalization.Operation Cooperation is in another independent system. The operation cooperationfunction focus on the result of a experiment other than its operation ?ow. What it imple-ments, is making two users can finish the same experiment mission by two different virtualteaching experiment system platforms cooperatively. Refer to the implement of this function,there are two modem for it; one is ideal modem and the other is compendious which can bemore suitable for the networking environment.Those function modules all have been implemented in existed virtual experiment plat-forms.The testing result have made clear that those function modules run stably and reach the level of practicality.