The Reaserch Of Web-based Intelligent Computer Assisted Instruction System

With the continuous development and spread of the technology of the computer and network, the methods ICAI(Intelligence Computer-Assisted Instruction) representing the advanced teaching ideas are emerged as the times require. It changed the traditional CAI teaching way of hipping and mechanized, and provided a new two-way teaching environment to the students.The ICAI has separated the teaching content from the teaching strategies, generated the contents and strategies suitable for individual dynamically according to the student model provided by the learning resource library and the search and reasoning of the intelligent system; based on the intelligent diagnosis system to determine the level of student learning, analyze reason of the students have made, give reasonable improving programs, modify the original learning strategies, and provide basis for the adjusting of the teaching contents by the techers.The paper from the real needs of the ICAI system, firstly, the paper describes the theoretical basis and development principle of the intelligent teaching system, then based on the ICAI systems of the Web to study the structure of the teacher module, student module, management module and other modules. Base on the above three modules and related basic data model, the paper gives the whole and specific design planning of the frame structure of the system. The system mainly adopts Scorm data standard, collective multimedia, internet and Web technique in design realization, and comprehensively utilizes many modern software design methods, developing models and modes, techniques and skills and the latest developing tools such as Prolog language, browser or server, Internet information service and so on.This paper at last deeply discusses and solves the important and difficult points of the system: the utilization of reasoning method of uncertainty based on reliability; application of Scorm data models; using the knowledge of concept map to indicate realizing knowledge diagnosis; the establishment of cognitive-type student models; evaluating students'level vaguely and comprehensively; forward and backward reasoning of teachers'teaching strategies and using improved genetic algorithm to realize intelligent test paper.The system profound significance in breaking through the limits of time and space in teaching, realizing the interactivity and cooperation of s teachers'teaching and students'learning,also sharing of teaching resource.