DUTIR at TREC 2006: Genomics and Enterprise Tracks

This paper describes the techniques we applied for the two TREC 2006 tracks, i.e., Genomics and Enterprise track. For the Genomics Track, we used a Rocchio relevance feedback method to expand the terms and then performed passage retrieval by building dual index and using half overlapped windows passages. Several approaches to merge the results and rerank the passages are presented. For the Enterprise track, we stripped the non-letter character from documents and query, built the index by indri or lemur and established expert document pools.