Keyphrases
- document retrieval
- document collections
- language model
- information retrieval
- cross language
- retrieval model
- text retrieval
- relevance feedback
- ranking functions
- spreading activation
- relevant documents
- information retrieval systems
- learning to rank
- document indexing
- active learning
- databases
- document ranking
- query independent
- database systems
- query terms
- learning algorithm
- passage retrieval
- question answering systems