Keyphrases
- information retrieval
- information retrieval systems
- document collections
- search engine
- test collection
- case study
- text mining
- retrieval effectiveness
- document retrieval
- query expansion
- language model
- information extraction
- information access
- tf idf
- computational linguistics
- database
- information filtering
- language modeling
- information seeking
- web information retrieval
- text retrieval
- relevant documents
- question answering
- computer science
- multiscale
- machine learning
- data mining
- real time