Keyphrases
- document retrieval
- document collections
- language model
- information retrieval
- passage retrieval
- retrieval model
- text retrieval
- spreading activation
- cross language
- document indexing
- learning to rank
- ranking functions
- retrieved documents
- relevance feedback
- document level
- document ranking
- language modeling
- query independent
- query terms
- co occurrence
- inverted index
- pseudo relevance feedback
- feature selection
- database