Keyphrases
- information retrieval
- information retrieval systems
- computer science
- social sciences
- query expansion
- artificial intelligence
- search engine
- information extraction
- language model
- document collections
- test collection
- information systems
- multiscale
- text mining
- real time
- computational linguistics
- document retrieval
- language processing
- text processing
- vector space model
- ir evaluation
- information seeking
- learning to rank
- retrieval model
- retrieval systems
- question answering
- data sets