| Summary: | 碩士 === 雲林科技大學 === 資訊工程研究所 === 96 === Nowadays, the rapid development of computers and the Internet makes search engines as important platforms to search desired information. However, the major challenge in information retrieval is the word mismatch. In order to solve the word mismatch, a query expansion technique that extends the keywords specified in initial queries is proposed. In the paper, we retrieve the titles and keywords of related web pages as the data source to build the document database. Then, we use specified keywords to find other keywords co-occurring in the same documents, and then find out more relevant documents. In the experiments, it reveals that our method could provide more relevant documents even for a complex query.
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