Keyphrases
- retrieval effectiveness
- medical information
- query expansion
- test collection
- information retrieval systems
- information retrieval
- retrieval model
- health care
- medical data
- query terms
- medical domain
- relevance feedback
- medical diagnosis
- patient records
- information sources
- web documents
- relevant documents
- web pages
- database
- search engine
- document retrieval
- expert systems
- data analysis
- web search engines
- medical records
- user queries
- knowledge based systems
- feature space
- database systems
- data sets