Cross-Language Retrieval for the CLEF Collections — Comparing Multiple Methods of Retrieval
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For our participation in CLEF, the Berkeley group participated in the monolingual, multilingual and GIRT tasks. To help enrich the CLEF relevance set for future training, we prepared a manual reformulation of the original German queries which achieved excellent performance, more than 110% better than average of median precision. The GIRT task performed English-German Cross-Language IR by comparing commercial machine translation with thesaurus lookup techniques and query expansion techniques. Combining all techniques using simple data fusion produced the best results.
KeywordsQuery Term Stopword List Thesaurus Term Query Expansion Technique Median Precision
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