文献主题，常见于文章、文献之中，是概括文献中关于某一事物的情报内容的概念。
... photo isolator 光耦合器 topic of article 文献主题 demarcate equipment 标定装置 ...
基于6个网页-相关网页
对文献主题的描述 representation of subject matter
给出文献的主题概念词 Subject Concept Terms
新主题文献 New topic document
文献主题主要集中在综合研究、试验研究、技术与措施3个方面。
The themes of documents are mainly concentrated in the 3 aspects of comprehensive study, experimental research and technology and measures.
而主题提取是以中文分词作为第一步，分词质量直接影响到文献主题提取的质量。
Chinese word segmentation is always the first step of subject extraction. The quality of word segmentation is effective to the quality of text subject extraction.
情报检索的目的是为用户服务，因而标引词的提取应以其与文献主题内容相关程度为标准。
Because the aim of information retrieval is to serve the users, the correlated degree of indexing words and the subject of the document should be the criteria of drawing them.
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