Keyphrases
- test collection
- information retrieval
- question answering
- retrieval effectiveness
- biomedical information retrieval
- concept drift
- error accumulation
- ad hoc retrieval
- relevance judgements
- question answering systems
- pseudo relevance feedback
- ir evaluation
- blog opinion retrieval
- trec web
- expert search
- weighting schemes
- database
- relevance assessments
- non stationary
- language model
- retrieval systems
- information retrieval systems
- evaluation campaigns
- okapi bm
- drift detection
- relevance feedback
- trec blog track
- relevance judgments