Keyphrases
- matrix factorization
- highly skewed
- collaborative filtering
- class distribution
- recommender systems
- missing data
- negative matrix factorization
- factorization methods
- nonnegative matrix factorization
- training dataset
- imbalanced datasets
- prior knowledge
- imbalanced data
- feature set
- model selection
- naive bayes
- decision trees
- feature vectors
- class imbalance
- high dimensional
- training data