Keyphrases
- database
- query processing
- response time
- data structure
- relevance feedback
- query evaluation
- query formulation
- keywords
- user queries
- query expansion
- data sets
- database queries
- query terms
- search queries
- original query
- multiple queries
- nearest neighbor
- user defined
- data sources
- active learning
- inverted index
- neural network
- relational queries
- algebraic operations