Research On The Intelligence Of The Numerical Control Training System Based On WEB

The Intelligent NC training system is a complex system involved with computer science, pedagogy, psychology, cognitive science, and behavior science. It aims to realize the positive cooperation between teachers and students under the controling of computer and to form the individualized interactive learning environment.The NC training system includes three modules: Domain Knowledge Base, Teacher Model and Student Model. The study of this paper includes: Domain Knowledge Base is the base of the system. It has direct influence on the adaptive ability and the performance of the system. Our goal is to enhance expandability, operability and reusability about knowledge description and the adaptive ability of the system. Teacher Modual is the key point to the system. Its primary mission is to choose the content and method according to the character of students. At first, students are divided into some grades according to their cognitive ability and interest, meanwhile the contents are divided into some classes according to its difficulty and degree of importance, so the establishment of instructional strategy includes:①the rearrangement of the knowledge tree will choose the contents for students;②the topological sort according to the relation of knowledge points to generate a best instructional sequence;③the establishment of the instructional rule base to adjust the student grade and the interrelated contents and methods that are taught in time according to the learning of the student. The Student Model is the precondition of the system. The cognitive ability and the learning state of students is evaluated and dignosed by fuzzy comprehensive evaluation so as to establish a cognitive student model.The characteristic of this paper included:the metaknowledge and DKB formed by the analyzing of the properties and their relationship with knowledge points, the best instructional sequence is designed and adjusted through the controlling of the metaknowledge according to the information offered by Student Model; the learning ability of students is evaluated and dignosed by fuzzy comprehensive evaluation.