关键词: 信息检索, 查询扩展, 上下文

Abstract: When editing a word processing document, we may search the Web by using a term in the document as an initial query and then modifying the query by adding keywords extracted from the text surrounding the search term. There are query expansion methods which use the text surrounding the search term in the initial result to weight candidate keywords in the source document to modify the query. However, this approach may lead to topic drift. To solve the problem, the initial results were filtered first and only the results containing similar contexts as that in the source document were selected to help choosing additional keywords. Experiments show that this method can get more appropriate additional keywords than other methods.

Key words: information retrieval, query expansion, context