UCLA-Okapi at TREC-2: Query Expansion Experiments
نویسندگان
چکیده
This is the rst participation of the Graduate School of Library and Information Science, University of California at Los Angeles in the TREC Conference. For TREC{2, Category B, UCLA used a version of the Okapi text retrieval system that was made available to UCLA by City University, London, UK. OKAPI has been described in TREC1 (Robertson, Walker, Hancock-Beaulieu, Gull & Lau, 1993a) as well as in this conference (Robertson, Walker, Jones, Hancock-Beaulieu, & Gatford, 1994). Okapi is a simple set-oriented system based on a generalized probabilistic model with facilities for relevance feedback. In addition OKAPI supports a full range of deterministic Boolean and quasi-Boolean operations.
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