Keyphrases
- information retrieval
- test collection
- retrieval effectiveness
- pseudo relevance feedback
- question answering
- blog opinion retrieval
- ad hoc retrieval
- expert search
- relevant documents
- machine learning
- evaluation campaigns
- ir evaluation
- probabilistic model
- trec blog track
- trec web
- artificial intelligence
- topic detection and tracking
- relevance judgments
- document rankings
- relevance judgements
- multimedia
- document collections
- query expansion
- relevance feedback
- website