A Detailed Study on Query Expansion Techniques in Information Retrieval. Soni, N. & Singh, J. International Journal of Emerging Trends in Engineering and Development, 4(4):433--444, June, 2014.
A Detailed Study on Query Expansion Techniques in Information Retrieval [pdf]Paper  abstract   bibtex   
Query expansion is a scheme that helps searchers to formulate improved query statements to retrieve better search results. It attempts to expand user's query through the analysis of initially retrieved documents. The objective of this technique is to find additional keyword for the query that improves the quality of recovered information. Numerous techniques have been proposed and tried for improving the effectiveness of searching the World Wide Web for documents relevant to given topic of interest. In this paper various techniques of expanding the query are discussed.

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