Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- ad hoc retrieval
- relevance feedback
- expert search
- pseudo relevance feedback
- blog opinion retrieval
- trec web
- topic detection and tracking
- ir evaluation
- evaluation campaigns
- okapi bm
- data mining
- query expansion
- social media
- active learning
- similarity measure
- feature selection
- biomedical information retrieval
- machine learning