Document (#16035)

Author
Robertson, S.E.
Walker, S.
Hancock-Beaulieu, M.M.
Title
Large test collection experiments of an operational, interactive system : OKAPI at TREC
Source
Information processing and management. 31(1995) no.3, S.345-360
Year
1995
Abstract
The Okapi system has been used in a series of experiments on the TREC collections, investiganting probabilistic methods, relevance feedback, and query expansion, and interaction issues. Some new probabilistic models have been developed, resulting in simple weigthing functions that take account of document length and within document and within query term frequency. All have been shown to be beneficial when based on large quantities of relevance data as in the routing task. Interaction issues are much more difficult to evaluate in the TREC framework, and no benefits have yet been demonstrated from feedback based on small numbers of 'relevant' items identified by intermediary searchers
Theme
Retrievalstudien
Semantisches Umfeld in Indexierung u. Retrieval
Object
Okapi

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  4. Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬An evaluation of interactive query expansion in an online library catalogue with a graphical user interface (1995) 0.38
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  5. Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992) 0.38
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