Author

Chun Hei Michael Chan

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#artificial intelligence Preprint Sep 2026

TwinS-GCN: Spectral conjugate for Spectral Graph Convolutional Networks

Graph convolutional networks propagate information by repeated local aggregation through a graph shift operator; i.e., a $K$-layer network reaches $K$ hops neighborhood. On the one hand, such spreading can lead to oversmoothing. On the other hand, long-range dependencies demand the depth. Transporting information on lo...

Chun Hei Michael Chan, F. Petruso, D. Van de Ville · 0 citations

Preprint Aug 2026

Graph Signal Surrogate Generation for Statistical Testing of Covariance Structure on Directed Graphs

The definition of directed graph wide-sense stationarity is revisited, and the surrogate signals preserve covariance under the stationary assumption to demonstrate the feasibility of the scheme to detect irregular node covariance and benchmark the method against conventional schemes using the symmetrized graph.

Chun Hei Michael Chan, Alexandre Cionca, D. Van de Ville · 0 citations