Graph Neural Networks with convolutional ARMA filters

5 Jan 2019  ·  Filippo Maria Bianchi, Daniele Grattarola, Lorenzo Livi, Cesare Alippi ·

Popular graph neural networks implement convolution operations on graphs based on polynomial spectral filters. In this paper, we propose a novel graph convolutional layer inspired by the auto-regressive moving average (ARMA) filter that, compared to polynomial ones, provides a more flexible frequency response, is more robust to noise, and better captures the global graph structure. We propose a graph neural network implementation of the ARMA filter with a recursive and distributed formulation, obtaining a convolutional layer that is efficient to train, localized in the node space, and can be transferred to new graphs at test time. We perform a spectral analysis to study the filtering effect of the proposed ARMA layer and report experiments on four downstream tasks: semi-supervised node classification, graph signal classification, graph classification, and graph regression. Results show that the proposed ARMA layer brings significant improvements over graph neural networks based on polynomial filters.

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Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Graph Regression Lipophilicity ARMA RMSE 0.894 # 8
Skeleton Based Action Recognition SBU ArmaConv Accuracy 96.00% # 4