Keyphrases
- information retrieval
- test collection
- retrieval effectiveness
- question answering
- expert search
- blog opinion retrieval
- social networks
- biomedical information retrieval
- retrieval model
- short queries
- ad hoc retrieval
- pseudo relevance feedback
- trec blog track
- evaluation campaigns
- relevance judgements
- relevance feedback
- average precision
- language model
- okapi bm
- trec web
- natural language
- learning algorithm