Keyphrases
- information retrieval
- information retrieval systems
- text retrieval
- search engine
- personality traits
- question answering
- text mining
- query expansion
- document collections
- vector space model
- learning to rank
- data sets
- human behavior
- digital libraries
- document retrieval
- artificial intelligence
- retrieval systems
- test collection
- information seeking
- information filtering
- tf idf
- latent semantic indexing
- structured documents
- collaborative filtering