Séminaires RALI-OLST

Language modeling for query expansion

Jing Bai

RALI, DIRO

Wednesday 26 October 2005 at 11:30 AM

Salle 3195, Pavillon André-Aisenstadt


Language Modeling (LM) has been successfully applied to Information Retrieval (IR). Dependence models have recently incorporated term relationships into LM to expand the document model. We extend this family of dependence models with term relationships and more sophisticated inferential relationships extracted with Information Flow (IF) which allow for context-dependent query expansion. Our experiments conducted on TREC collections show that we can obtain large and significant improvements with this approach.


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