Keyphrases
- information retrieval
- information retrieval systems
- search engine
- text mining
- query expansion
- question answering
- information seeking
- information extraction
- text retrieval
- human computer interaction
- databases
- vector space model
- document retrieval
- retrieval systems
- test collection
- relevance feedback
- relevant documents
- user interaction
- learning to rank
- keywords
- language modeling
- information access
- real time
- information filtering
- tf idf
- web information retrieval
- multi touch