Keyphrases
- learning to rank
- information retrieval
- learning to rank algorithms
- evaluation measures
- ranking functions
- document retrieval
- ranking svm
- loss function
- information retrieval systems
- evaluation metrics
- test collection
- retrieval effectiveness
- retrieval systems
- collaborative filtering
- direct optimization
- text retrieval
- normalized discounted cumulative gain
- relevance judgments
- query dependent
- query expansion
- search engine
- retrieval model
- document collections
- user feedback
- language model
- relevant documents
- language modeling
- ranking models
- supervised learning
- information extraction
- directly optimize
- feature vectors
- machine learning