Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- pseudo relevance feedback
- ad hoc retrieval
- relevance judgments
- reuters corpus volume
- trec web
- ir evaluation
- conceptual model
- blog opinion retrieval
- expert search
- databases
- website
- retrieval model
- retrieval systems
- information systems
- query performance prediction
- okapi bm
- data warehouse
- high level