Keyphrases
- test collection
- information retrieval
- question answering
- retrieval effectiveness
- blog opinion retrieval
- ir evaluation
- database
- ad hoc retrieval
- relevance judgments
- okapi bm
- pseudo relevance feedback
- retrieval systems
- expert search
- biomedical information retrieval
- relevant documents
- databases
- learning to rank
- artificial intelligence
- relevance assessments
- neural network
- document level
- question answering systems
- data mining
- relevance feedback
- query processing