Abstract: To solve the problems that terms relationships are not considered in the belief network model, this paper uses the query term synonyms, presents an extended belief network model for IR, introduces models topology and retrieval method, and illustrates an example. This model has better performance because it takes account of not only query terms but also query term synonym.

Key words: Query term, Synonym, Information retrieval, Belief network

摘要： 针对信念网络模型没有考虑术语之间关系的缺陷，引入了查询同义词的概念，提出了一个基于查询术语同义词的扩展信念网络检索模型。给出了模型的拓扑结构，讨论了利用新模型进行信息检索的方法，并给出了一个实用案例。新模型同时考虑了用户查询术语及其同义词的作用，提高了检索性能。

关键词: 查询术语, 同义词, 信息检索, 信念网络

CLC Number: 

• TP18