Lexical cohesion and term proximity in document ranking
Information Processing and Management: an International Journal
Unsupervised query categorization using automatically-built concept graphs
Proceedings of the 18th international conference on World wide web
Lexical and Syntactic knowledge for Information Retrieval
Information Processing and Management: an International Journal
Proceedings of the 10th Conference on Open Research Areas in Information Retrieval
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The paper presents several techniques for selecting noun phrases for interactive query expansion following pseudo-relevance feedback and a new phrase-based document ranking method. A combined syntactico-statistical method was used for the selection of phrases for query expansion. Several statistical measures of phrase selection were evaluated. Experiments were also conducted studying the effectiveness of noun phrases in document ranking. One of the major problems in phrase-based document retrieval is weighting of overlapping and non-contiguous word sequences in documents. The paper presents a new method of phrase weighting, which addressed this problem, and its evaluation on the TREC dataset.