智能辅助教学系统中知识点切分歧义消除研究

Research on Cutting Knowledge Points in Intelligent Computer Aided Instruction

智能辅助教学系统(ICAI)的出现使得CAI得到了更加广泛的应用,应用ICAI可以帮助学习者巩固相关知识点。根据IEEE 1484,设计了一个专门的ICAI。从ICAI的课件、教材、试题库中切分知识点时,容易产生歧义。因此,提出了歧义消除算法,并对算法进行了简单的分析。模拟实验证明,在专门的ICAI基础上设计的知识点歧义消除算法,使得知识点的召回率、精确率分别提高了1%和3%。最后介绍了系统实现的部分功能。实践测试说明,在一个章节中,切分后的知识点经过歧义消除后未产生歧义的分词。

Emergence of intelligent computer aided instruction （ICAI） makes CAI being applied widely. ICAI can help learner consolidate related knowledge points. According to IEEE 1484, a special ICAI is designed. When cutting knowledge points from courseware,learning materials and examinations question database, it is very easy to produce ambiguity. Therefore, an algorithm for ambiguous word eliminating is presented and analyzed. Simulation examination proves that the algorithm based on ICAI increases the recall rate and precise rate by 1% and 3% respectively. At last, sectional functions of ICAI is introduced. Practice test illustrates that cutted knowledge points didn＇t appear ambiguous after ambiguous word eliminating in one chapter.