期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2013
卷号：57
期号：1
出版社：Journal of Theoretical and Applied
摘要：The ease of use of a large quantity of information source has spurred a great amount of attempt in the growth and enhancement of Information Retrieval techniques. Users� information needs are expressed in the form of natural language and keyword queries. The successful retrieval is very much dependent on the effective communication of the intended purpose. The relative ineffectiveness of information retrieval systems is mostly caused by the inaccuracy of a query formed by a few keywords. The well known method to overcome this limitation is the Query Expansion (QE), in which the user entered queries are augmented with new concepts with similar meaning. In this paper we discuss about various Query Expansion approaches with some of the case studies. Finally we discuss the issues related to Information Retrieval (IR) and further research directions towards the effective Information Retrieval.
