Keyphrases
- test collection
- information retrieval
- question answering
- pseudo relevance feedback
- retrieval effectiveness
- relevance feedback
- blog opinion retrieval
- reuters corpus volume
- expert search
- ad hoc retrieval
- biomedical information retrieval
- relevance judgments
- real world
- average precision
- genetic algorithm
- relevance assessments
- question answering systems
- okapi bm
- neural network
- data sets