Meta-graph based recommendation fusion over heterogeneous information networks

H Zhao, Q Yao, J Li, Y Song, DL Lee - Proceedings of the 23rd ACM …, 2017 - dl.acm.org
Proceedings of the 23rd ACM SIGKDD international conference on knowledge …, 2017dl.acm.org
Heterogeneous Information Network (HIN) is a natural and general representation of data in
modern large commercial recommender systems which involve heterogeneous types of
data. HIN based recommenders face two problems: how to represent the high-level
semantics of recommendations and how to fuse the heterogeneous information to make
recommendations. In this paper, we solve the two problems by first introducing the concept
of meta-graph to HIN-based recommendation, and then solving the information fusion …
Heterogeneous Information Network (HIN) is a natural and general representation of data in modern large commercial recommender systems which involve heterogeneous types of data. HIN based recommenders face two problems: how to represent the high-level semantics of recommendations and how to fuse the heterogeneous information to make recommendations. In this paper, we solve the two problems by first introducing the concept of meta-graph to HIN-based recommendation, and then solving the information fusion problem with a "matrix factorization (MF) + factorization machine (FM)" approach. For the similarities generated by each meta-graph, we perform standard MF to generate latent features for both users and items. With different meta-graph based features, we propose to use FM with Group lasso (FMG) to automatically learn from the observed ratings to effectively select useful meta-graph based features. Experimental results on two real-world datasets, Amazon and Yelp, show the effectiveness of our approach compared to state-of-the-art FM and other HIN-based recommendation algorithms.
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