Publication Type

Journal Article

Version

submittedVersion

Publication Date

9-2022

Abstract

As important side information, attributes have been widely exploited in the existing recommender system for better performance. However, in the real-world scenarios, it is common that some attributes of items/users are missing (e.g., some movies miss the genre data). Prior studies usually use a default value (i.e., "other") to represent the missing attribute, resulting in sub-optimal performance. To address this problem, in this paper, we present an attribute-aware attentive graph convolution network (A(2)-GCN). In particular, we first construct a graph, where users, items, and attributes are three types of nodes and their associations are edges. Thereafter, we leverage the graph convolution network to characterize the complicated interactions among . Furthermore, to learn the node representation, we adopt the message-passing strategy to aggregate the messages passed from the other directly linked types of nodes (e.g., a user or an attribute). Towards this end, we are capable of incorporating associate attributes to strengthen the user and item representation learning, and thus naturally solve the attribute missing problem. Given that for different users, the attributes of an item have different influence on their preference to this item, we design a novel attention mechanism to filter the message passed from an item to a target user by considering the attribute information. Extensive experiments have been conducted on several publicly accessible datasets to justify our model, demonstrating that our model outperforms several state-of-the-art methods and demonstrate the effectiveness of our attention method.

Keywords

Attribute, graph convolutional networks, recommendatiosn, attention mechanism

Discipline

Databases and Information Systems | Data Storage Systems

Publication

IEEE Transactions on Knowledge and Data Engineering

Volume

34

Issue

9

First Page

4077

Last Page

4088

ISSN

1041-4347

Identifier

10.1109/TKDE.2020.3040772

Publisher

Institute of Electrical and Electronics Engineers

Additional URL

http://doi.org/10.1109/TKDE.2020.3040772

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