Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- smart environments
- pseudo relevance feedback
- ad hoc retrieval
- topic detection and tracking
- biomedical information retrieval
- query expansion
- genetic algorithm
- neural network
- expert search
- relevance judgements
- reuters corpus volume
- information systems
- search engine
- smart objects
- trec web
- blog opinion retrieval