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Sparsity Reduction Technique Using Grouping Method for Matrix Factorization in Differentially Private Recommendation Systems.
Taewhan Kim
Kangsoo Jung
Seog Park
Published in:
IEICE Trans. Inf. Syst. (2020)
Keyphrases
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matrix factorization
collaborative filtering
recommendation systems
differentially private
recommender systems
keywords
high dimensional
probabilistic model
negative matrix factorization