Keyphrases
- data processing
- information retrieval
- information retrieval systems
- search engine
- data management
- computer systems
- language model
- data analysis
- text mining
- measurement noise
- information access
- text retrieval
- retrieval model
- test collection
- vector space model
- language modeling
- ir evaluation
- data acquisition
- relevant documents
- statistical analysis
- relevance feedback
- learning algorithm
- query expansion
- high speed
- information extraction
- tf idf
- structured documents
- computational linguistics
- machine learning