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CNN to GNN: Unsupervised Multi-level Knowledge Learning

Published: 21 October 2024 Publication History

Abstract

Although graph neural networks (GNNs) can extract the latent relationship-level knowledge among the graph nodes and have achieved excellent performance in unsupervised scenarios, it is weak in learning the instance-level knowledge in contrast to the convolution neural networks (CNNs). Besides, lacking of the graph structure limits the extension of GNNs on non-graph datasets. To solve these problems, we propose a novel unsupervised multi-level knowledge fusion network. It successfully unifies the instance-level and relationship-level knowledge on the non-graph data by distillation from a pre-trained CNN teacher to a GNN student. Meanwhile, a sparse weighted strategy is designed to adaptively extract the sparse graph topology and extend the GNN on non-graph datasets. By optimization of distillation loss, the "boosted'' GNN student can learn the multi-level knowledge and extract more discriminative deep embeddings for clustering. Finally, extensive experiments show it has achieved excellent performance compared with the current methods.

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    cover image ACM Conferences
    CIKM '24: Proceedings of the 33rd ACM International Conference on Information and Knowledge Management
    October 2024
    5705 pages
    ISBN:9798400704369
    DOI:10.1145/3627673
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    Published: 21 October 2024

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    Author Tags

    1. from CNN to GNN
    2. multi-level knowledge fusion
    3. sparse weighted strategy

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