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Multi-level self-adaptive prototypical networks for few-shot node classification on attributed networks

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Abstract

Attributed networks, such as social networks, citation networks, and traffic networks, are ubiquitous nowadays. Node classification is an essential analysis task on attributed networks that has attracted increasing research attention. However, the conventional node classification methods usually require a large number of labeled training instances, which is labor-consuming and cannot be applied to real-world attributed networks. Thus, various meta-learning methods have been proposed to tackle the problem of insufficient labeled instances. However, few-shot learning for graph-structured data is still under-explored due to two reasons: (1) In the few-shot scenario, equally treating each node makes the model vulnerable to noisy instances; (2) The adjacency matrix and attributed features suffer from the data sparsity and not all dimensions in the feature space are discriminative to support final classification. To solve the above problems, we propose a novel graph meta-learning framework: Multi-Level Self-Adaptive Prototypical Networks (MSPN). The proposed MSPN leverages multi-level adaptive learning to highlight the most expressive nodes and features and rectify the prototype to obtain a more accurate one. The episodic training strategy mimics the real testing scenario and transfers knowledge from previous tasks to unseen target tasks. Extensive experimental results demonstrate that the MSPN is superior to the other methods on few-shot node classification.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (62192784, 62172056, 62272058) and CCF-Tencent Open Fund (RAGR20220125).

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  1. Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia, School of Computer Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Xin Xu, Junping Du & Zhe Xue

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  1. Xin Xu
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  2. Junping Du
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Xu, X., Du, J. & Xue, Z. Multi-level self-adaptive prototypical networks for few-shot node classification on attributed networks. Neural Comput & Applic 35, 9131–9144 (2023). https://doi.org/10.1007/s00521-022-08175-4

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