Keyphrases
- document retrieval
- language model
- information retrieval
- document collections
- text retrieval
- ranking functions
- retrieval model
- learning to rank
- relevance feedback
- pseudo relevance feedback
- relevant documents
- spreading activation
- document indexing
- low dimensional
- passage retrieval
- data sets
- document ranking
- query independent
- document image retrieval
- xml retrieval
- vector space
- inverted index
- test collection
- information retrieval systems
- feature space
- natural language
- learning environment
- databases