期刊
EXPERT SYSTEMS WITH APPLICATIONS
卷 229, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eswa.2023.120410
关键词
Social recommendation; Disentangled representation learning; Deep graph neural network
In this paper, we propose a Deep Adaptive Collaborative Graph Neural Network for Social Recommendation (DUI-SoRec), which addresses the issues of social inconsistency and over-smoothing in GCN-based recommender systems. By generating two subgraphs and utilizing a deep adaptive graph neural network, the model learns user and item embeddings effectively. The model's effectiveness is demonstrated through extensive experiments on real-world datasets.
Most graph convolutional network (GCN)-based social recommendation frameworks fuse social links with user-item interactions to enrich user representations, which alleviate the cold-start problem and data sparsity problem. However, GCN-based recommender systems still suffer from two limitations. First, Excessive reliance on social graphs to extract user interests for rating predictions is unreliable due to social inconsistency. Second, GCN-based models suffer from over-smoothing problems, node embeddings become more similar when going deeper to enable larger receptive fields. To address the two aforementioned problems simultaneously, we propose a Deep Adaptive Collaborative Graph Neural Network for Social Recommendation (DUI-SoRec). First, the graph generation module decomposes the user-item interaction to generate two subgraphs: an u2u graph and an i2i graph. Secondly, the graph learning module utilizes a deep adaptive graph neural network to learn user and item embeddings on the two subgraphs and the existing social graph, while solving the over -smoothing problem. Finally, we designed a refined fusion module to aggregate the social graph and u2u graph to address the social inconsistency. We conducted extensive experiments on four real-world datasets and the results demonstrate the model's effectiveness.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据