Keyphrases
- matrix factorization
- collaborative recommendation
- cold start problem
- recommender systems
- collaborative filtering
- data sparsity
- user profiling
- personalized recommendation
- low rank
- user preferences
- association rules
- factorization methods
- negative matrix factorization
- missing data
- spreading activation
- nonnegative matrix factorization
- cold start
- user behavior
- user profiles