Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- pseudo relevance feedback
- relevance feedback
- databases
- evaluation campaigns
- decision trees
- machine learning
- real world
- database
- interactive query expansion
- reuters corpus volume
- trec blog track
- document collections
- genetic algorithm
- data mining
- ad hoc retrieval
- topic detection and tracking
- ir evaluation