Keyphrases
- information retrieval
- text mining
- information access
- model selection
- search engine
- test collection
- information retrieval systems
- maximum likelihood
- question answering
- information filtering
- information extraction
- language modeling
- mixture model
- computational linguistics
- machine learning
- language processing
- database
- minimum message length
- learning to rank
- retrieval effectiveness
- retrieval model
- query expansion
- xml documents
- real world