RALI-OLST-ILFC Weekly Talks

On Wednesdays at 11:30 a.m. (Montreal time), we hold a one-hour talk on a language processing or linguistics topic. It is typically offered in hybrid mode (in person/videoconference). Once a month, the talk is organized by the French research group Linguistique Informatique, Formelle et de Terrain.

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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