Keyphrases
- relevance feedback
- response time
- ad hoc retrieval
- test collection
- query processing
- information retrieval
- database
- relevance judgments
- data structure
- query expansion
- query evaluation
- question answering
- retrieval effectiveness
- query terms
- user interaction
- database queries
- information retrieval systems
- data sources
- short queries
- query performance prediction
- range queries
- average precision
- web search