在检索系统对基于互联网的海量信息进行检索的过程中,检索效率很大程度上取决于检索策略的质量。为提高检索策略的正确性,本文根据信息逻辑检索的基本原理,并参照DIALOG系统,提出了检索需求的主题分析法则,并在此基础上建立了检索策略优化模型。同时,还给出了此模型在操作执行过程中的组配机制。 In the search system to retrieve massive information based on the Internet, the retrieval efficiency depends largely on the quality of the retrieval strategy. In order to improve the correctness of the retrieval strategy, this paper proposes a thematic analysis rule of retrieval demand based on the basic principle of information logic retrieval and referring to DIALOG system. On the basis of this, a retrieval strategy optimization model is established. At the same time, the mechanism of assembly of this model in operation is given.