Reducing the risk of query expansion via robust constrained optimization.
Kevyn Collins-ThompsonPublished in: CIKM (2009)
Keyphrases
- query expansion
- constrained optimization
- information retrieval systems
- constrained optimization problems
- text retrieval
- retrieval effectiveness
- language modeling
- language model
- relevant documents
- automatic query expansion
- objective function
- relevance feedback
- pseudo relevance feedback
- improving search
- unconstrained optimization
- penalty function
- information retrieval
- ad hoc retrieval
- query disambiguation
- biomedical information retrieval
- retrieval model
- original query
- retrieved documents
- ranking scheme
- ranked retrieval
- relevance model
- query terms
- pseudo feedback
- trec genomics track
- vocabulary mismatch
- interactive query expansion
- model for information retrieval
- penalty functions
- query specific
- lagrange multipliers