主题词的选择和使用，直接影响文献检索的查准率和查全率。
The choice and use of theme words directly affects the accuracy and completeness of data retrieval.
在专利检索中，检索主题的IPC的确定，检索主题的主题词的识别是一项重要的工作。
On patent retrieval, it is important that the work of identifying IPC and theme terms of theme searched.
本文针对目前主题词标引和检索过程中存在的问题进行了分析，提出了改进的方法。
This article analyzes some existent problems in connection with marking subject words and in the course of research at present, at the same time, it put forWards improvement methods.
同时由于这些主题词间具有网状关系，可以在这种网状结构中引入超链接技术，使用户能由此沿链进行更大范围或更专指的检索。
Meanwhile, as there is a net relation among the subject words, the hyper chaining technique can be introduced into this net structure.
目的：探讨医学文献检索中如何对检索词(主题词和自由词等)进行适当的选择。
Aim: to explore how to select suitable searching words (subject word and random word) in medical document retrieval.
该文提出一种新的利用关联规则挖掘中文文本主题词的方法，该方法抽取的主题词包括关键词和相关检索词两部分。
This paper presents an approach for extracting thematic terms based on association rules, which include both key phrases and related terms.
对用户的检索，进行查询词到主题词的转化，计算语义相似度，按照 语义相似度算法进行排序文档。
Second, we make a conversion from users' query to the thesaurus, then calculate the semantic similarity in the thesaurus network.
对用户的检索，进行查询词到主题词的转化，计算语义相似度，按照 语义相似度算法进行排序文档。
Second, we make a conversion from users' query to the thesaurus, then calculate the semantic similarity in the thesaurus network.
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