Keyphrases
- document retrieval
- document collections
- language model
- information retrieval
- retrieval model
- text retrieval
- document ranking
- relevant documents
- relevance feedback
- ranking functions
- learning to rank
- information retrieval systems
- cross language
- web search
- retrieved documents
- spreading activation
- document indexing
- machine learning
- inverted index
- pseudo relevance feedback
- xml retrieval
- document image retrieval