Keyphrases
- query expansion
- retrieval effectiveness
- information retrieval systems
- language model
- language modeling
- n gram
- pseudo relevance feedback
- information retrieval
- improving search
- relevance feedback
- automatic query expansion
- relevant documents
- text retrieval
- retrieval model
- query disambiguation
- ad hoc retrieval
- original query
- trec genomics track
- vector space
- word sense disambiguation
- query terms
- document level
- ranked retrieval
- term weighting
- co occurrence
- keywords
- interactive query expansion
- feature selection
- retrieved documents
- document collections
- biomedical information retrieval
- web pages