Keyphrases
- information retrieval
- case based reasoning
- search engine
- text mining
- information retrieval systems
- document retrieval
- information extraction
- query expansion
- vector space model
- question answering
- retrieval systems
- model based reasoning
- information access
- information seeking
- relevant documents
- document collections
- genetic algorithm
- retrieval effectiveness
- learning to rank
- language modeling
- test collection
- term weighting
- computational linguistics