Keyphrases
- image understanding
- test collection
- information retrieval
- question answering
- retrieval effectiveness
- pseudo relevance feedback
- ad hoc retrieval
- biomedical information retrieval
- blog opinion retrieval
- evaluation campaigns
- ir evaluation
- genetic algorithm
- topic detection and tracking
- language model
- relevance feedback
- digital libraries
- data sets
- active learning
- document collections
- weighting schemes
- okapi bm
- natural language processing
- document rankings