Keyphrases
- information retrieval
- information retrieval evaluation
- information retrieval systems
- test collection
- query expansion
- vector space model
- question answering
- text mining
- search engine
- information extraction
- data sets
- text processing
- language processing
- evaluation methods
- language modeling
- document collections
- machine learning
- data mining
- retrieval model
- retrieval effectiveness
- learning to rank
- database
- information access
- neural network
- text classification
- artificial intelligence
- structured documents
- relevance feedback
- decision trees