CGMN: A Contrastive Graph Matching Network for Self-Supervised Graph Similarity Learning

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Jin, D
Wang, L
Zheng, Y
Li, X
Jiang, F
Lin, W
Pan, S
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2022
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Vienna, Austria
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Graph similarity learning refers to calculating the similarity score between two graphs, which is required in many realistic applications, such as visual tracking, graph classification, and collaborative filtering. As most of the existing graph neural networks yield effective graph representations of a single graph, little effort has been made for jointly learning two graph representations and calculating their similarity score. In addition, existing unsupervised graph similarity learning methods are mainly clustering-based, which ignores the valuable information embodied in graph pairs. To this end, we propose a contrastive graph matching network (CGMN) for self-supervised graph similarity learning in order to calculate the similarity between any two input graph objects. Specifically, we generate two augmented views for each graph in a pair respectively. Then, we employ two strategies, namely cross-view interaction and cross-graph interaction, for effective node representation learning. The former is resorted to strengthen the consistency of node representations in two views. The latter is utilized to identify node differences between different graphs. Finally, we transform node representations into graph-level representations via pooling operations for graph similarity computation. We have evaluated CGMN on eight real-world datasets, and the experiment results show that the proposed new approach is superior to the state-of-the-art methods in graph similarity learning downstream tasks.

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Proceedings of the Thirty-First International Joint Conference on Artificial Intelligence (IJCAI-22)
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© 2022 International Joint Conference on Artificial Intelligence. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the Conference's website for access to the definitive, published version.
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Artificial intelligence
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Jin, D; Wang, L; Zheng, Y; Li, X; Jiang, F; Lin, W; Pan, S, CGMN: A Contrastive Graph Matching Network for Self-Supervised Graph Similarity Learning, Proceedings of the Thirty-First International Joint Conference on Artificial Intelligence (IJCAI-22), 2022, pp. 2101-2107