Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- blog opinion retrieval
- relevance feedback
- pseudo relevance feedback
- query performance prediction
- biomedical information retrieval
- document collections
- language model
- search engine
- ad hoc retrieval
- question answering systems
- ir evaluation
- evaluation campaigns
- trec web
- multimedia
- relevance judgements
- genetic algorithm