Keyphrases
- document retrieval
- language model
- document collections
- information retrieval
- relevance feedback
- relevant documents
- text retrieval
- retrieval model
- question answering systems
- document indexing
- document ranking
- retrieval systems
- query terms
- ranking functions
- xml retrieval
- passage retrieval
- document image retrieval
- retrieval strategies
- cross language
- learning to rank
- information retrieval systems
- multimedia