Search Results for author: Xing Ai

Found 8 papers, 0 papers with code

Adversarially Robust Signed Graph Contrastive Learning from Balance Augmentation

no code implementations19 Jan 2024 Jialong Zhou, Xing Ai, Yuni Lai, Kai Zhou

Similar to how structure learning can restore unsigned graphs, balance learning can be applied to signed graphs by improving the balance degree of the poisoned graph.

Contrastive Learning Link Sign Prediction

Universally Robust Graph Neural Networks by Preserving Neighbor Similarity

no code implementations18 Jan 2024 Yulin Zhu, Yuni Lai, Xing Ai, Kai Zhou

This theoretical proof explains the empirical observations that the graph attacker tends to connect dissimilar node pairs based on the similarities of neighbor features instead of ego features both on homophilic and heterophilic graphs.

Adversarial Robustness

Graph Anomaly Detection at Group Level: A Topology Pattern Enhanced Unsupervised Approach

no code implementations2 Aug 2023 Xing Ai, Jialong Zhou, Yulin Zhu, Gaolei Li, Tomasz P. Michalak, Xiapu Luo, Kai Zhou

Graph anomaly detection (GAD) has achieved success and has been widely applied in various domains, such as fraud detection, cybersecurity, finance security, and biochemistry.

Contrastive Learning Fraud Detection +1

Homophily-Driven Sanitation View for Robust Graph Contrastive Learning

no code implementations24 Jul 2023 Yulin Zhu, Xing Ai, Yevgeniy Vorobeychik, Kai Zhou

We conduct extensive experiments to evaluate the performance of our proposed model, GCHS (Graph Contrastive Learning with Homophily-driven Sanitation View), against two state of the art structural attacks on GCL.

Adversarial Robustness Contrastive Learning

Labeled Subgraph Entropy Kernel

no code implementations21 Mar 2023 Chengyu Sun, Xing Ai, Zhihong Zhang, Edwin R Hancock

In this paper, we propose a novel labeled subgraph entropy graph kernel, which performs well in structural similarity assessment.

Simple yet Effective Gradient-Free Graph Convolutional Networks

no code implementations1 Feb 2023 Yulin Zhu, Xing Ai, Qimai Li, Xiao-Ming Wu, Kai Zhou

Linearized Graph Neural Networks (GNNs) have attracted great attention in recent years for graph representation learning.

Graph Representation Learning Node Classification

Two-level Graph Neural Network

no code implementations3 Jan 2022 Xing Ai, Chengyu Sun, Zhihong Zhang, Edwin R Hancock

Moreover, we provide a mathematical analysis of the LPI problem which demonstrates that subgraph-level information is beneficial to overcoming the problems associated with LPI.

Subgraph Counting Vocal Bursts Valence Prediction

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