Keyphrases
- information retrieval
- information retrieval systems
- query expansion
- document collections
- learning to rank
- information filtering
- language model
- retrieval systems
- relevant documents
- information access
- retrieval effectiveness
- text retrieval
- document retrieval
- test collection
- domain specific
- vector space model
- question answering
- latent semantic indexing
- language modeling
- text mining
- knowledge discovery
- multimedia