基于互信息构建关键词—叙词对照表的研究

关键词灵活、易用,但检索效率低。叙词检索效率高,但使用困难。最有效的方法是使用关键词和叙词对照表,实现两者之间的转换。本文探讨利用互信息的原理与方法建立关键词—叙词对照表,实验表明这种方法切实可行,能达到比较令人满意的效果。

Keywords are flexible and easy to use, however their retrieval efficieny is low. Thesaurus has a high retrieval efficiency, but it is difficult to use. The most efficient way is to use a keyword-thesaurus switch table to realize the transformation between them. This article discusses how to use the mutual information theory and method to construct a keyword-thesaurus switch table. The experiment shows this method is feasible and can obtain a satisfactory result.