Keyphrases
- learning to rank
- information retrieval
- document retrieval
- retrieval systems
- ranking functions
- loss function
- keyphrase extraction
- evaluation measures
- information retrieval systems
- document collections
- ranking svm
- collaborative filtering
- directly optimize
- relevance judgments
- data sets
- ranking list
- normalized discounted cumulative gain
- learning to rank algorithms
- direct optimization
- query dependent
- keyphrases
- evaluation metrics
- relevant documents
- test collection
- web search
- supervised learning
- machine learning