TREC-8 Automatic Ad-Hoc Experiments at Fondazione Ugo Bordoni

Claudio Carpineto, Giovanni Romano
1999 Text Retrieval Conference  
We present further evidence suggesting the feasibilty of using information theoretic query expansion for improving the retrieval effectiveness of automatic document ranking . Compared to our participation in TREC-7, in which we applied this technique to an ineffective initial ranking, here we show that information theoretic query expansion may be effective even when the quality of the first pass ranking is high. In TREC-8 our system has been ranked among the best systems for both automatic ad
more » ... c and short automatic ad hoc. These results are even more interesting considering that we used single-word indexing and well known weighting schemes. We also investigate the use of term variance to refine the weighting schemes employed by our system to weight documents and queries.
dblp:conf/trec/CarpinetoR99 fatcat:kkt36pojcje45kt23nzmuegi7u