Keyphrases
- test collection
- information retrieval
- search tasks
- retrieval effectiveness
- question answering
- biomedical information retrieval
- pseudo relevance feedback
- relevance judgments
- weighting schemes
- relevance feedback
- database
- ad hoc retrieval
- ir evaluation
- blog opinion retrieval
- search engine
- text classification
- artificial intelligence
- expert search
- okapi bm