16. Recommender Systems
2021-01-30 本文已影响0人
玄语梨落
Recommender Systems
Problem formulation
Content-based recommendations
Optimization objective
To learn (parameter for user
):
To learn all ():
Collaborative Filtering
Given :
Collaborative filtering algorithm
Minimizing and
simultaneously:
Gradient dexcent:
Vectorization: Low rank matrix factorization
Predicted ratings: