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Star Topology Convolution for Graph Representation Learning

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posted on 26.05.2022, 17:31 authored by Chong WuChong Wu, Zhenan Feng, Jiangbin Zheng, Houwang Zhang, Jiawang Cao, Hong YAN

We present a novel graph convolutional method called star topology convolution (STC). This method makes graph convolution more similar to conventional convolutional neural networks (CNNs) in Euclidean feature spaces. STC learns subgraphs which have a star topology rather than learning a fixed graph like most spectral methods. Due to the properties of a star topology, STC is graph-scale free (without a fixed graph size constraint). It has fewer parameters in its convolutional filter and is inductive, so it is more flexible and can be applied to large and evolving graphs. The convolutional filter is learnable and localized, similar to CNNs in Euclidean feature spaces, and can share weights across graphs. To test the method, STC was compared with state-of-the-art graph convolutional methods in a supervised learning setting on nine node properties prediction benchmark datasets: Cora, Citeseer, Pubmed, PPI, Arxiv, MAG, ACM, DBLP, and IMDB. The experimental results showed that STC achieved state-of-the-art performance on all these datasets and maintained good robustness. In an essential protein identification task, STC outperformed state-of-the-art essential protein identification methods. An application of using pretrained STC as the embedding for feature extraction of some downstream classification tasks was introduced. The experimental results showed that STC can share weights across different graphs and be used as the embedding to improve the performance of downstream tasks.

Funding

Hong Kong Innovation and Technology Commission (InnoHK Project CIMDA)

Hong Kong Research Grants Council (Project 11204821)

City University of Hong Kong (Project 9610034)

History

Email Address of Submitting Author

chongwu2-c@my.cityu.edu.hk

ORCID of Submitting Author

0000-0003-3405-742X

Submitting Author's Institution

Department of Electrical Engineering and Centre for Intelligent Multidimensional Data Analysis, City University of Hong Kong

Submitting Author's Country

China