Keyphrases
- learning to rank
- information retrieval
- document retrieval
- retrieval systems
- test collection
- ranking functions
- query dependent
- loss function
- evaluation measures
- information retrieval systems
- direct optimization
- document collections
- language model
- collaborative filtering
- retrieval model
- ranking svm
- learning to rank algorithms
- relevance feedback
- average precision
- evaluation metrics
- keyphrase extraction
- user feedback
- multimedia retrieval
- text retrieval
- news articles
- keywords
- query processing
- news stories
- digital libraries
- image retrieval
- retrieval effectiveness
- retrieval process
- directly optimize
- supervised learning