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https://doi.org/10.3233/faia24...
Part of book or chapter of book . 2024 . Peer-reviewed
License: CC BY NC
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Part of book or chapter of book . 2024
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Conference object . 2025
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Adaptive Spectral-Heterophily for Node Classification

Authors: Pirrò, Giuseppe;

Adaptive Spectral-Heterophily for Node Classification

Abstract

Node classification in graphs, particularly those exhibiting heterophily, poses significant challenges for traditional methodologies. These include various graph neural network variants and approaches that simplify graph convolutions. This paper proposes a novel approach called nCASH, which combines an innovative label propagation method that utilizes features to compute soft labels and node homophily scores. It also incorporates multi-filter spectral convolutions and a redefined Laplacian matrix tailored for heterophilic graphs. nCASH allows for different types of feature transformations; each region of the graph is characterized by its homophily scores, which dictate the type of filter applied. Low-pass filters are used in homophilous regions, and high-pass filters in heterophilous regions to accentuate differences. nCASH, free from extensive training requirements, relies on sparse matrix multiplications. This enhances scalability and efficiency. Empirical results demonstrate the effectiveness of this approach, showing improvements in classification accuracy on several state-of-the-art heterophilic datasets.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
hybrid