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Author

Zuobin Xiong

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#machine learning Preprint Sep 2026

FoundAna: A GNN-assisted Foundation Model for Graph Anomaly Detection

Graph anomaly detection aims to identify graph structures (e.g., nodes, edges, or subgraphs) that deviate significantly from expected patterns, which supports critical applications in fraud detection, spam identification, network intrusion, etc. Despite the growing methods in the field, existing approaches follow a one...

Suprim Nakarmi, Chahana Dahal, Yue Zhao et al. · 0 citations
#diffusion models Preprint Aug 2026

Membership is Ownership: A Robust Ownership Verification Framework for Diffusion Models

This work investigates IP protection (i.e., model ownership verification) for diffusion models in a realistic commercial scenario with minimal model utility loss, and builds a framework for model ownership verification, termed ``{Membership is Ownership} (MiO)'', based on a population-level hypothesis test on a private...

Feng-Nan Jiang, Zuobin Xiong, An Huang et al. · 0 citations

GONE: Structural Knowledge Unlearning via Neighborhood-Expanded Distribution Shaping

Graph Oblivion and Node Erasure (GONE), a benchmark for evaluating knowledge unlearning over structured knowledge graph (KG) facts in LLMs, enables the disentanglement of three effects of unlearning: direct fact removal, reasoning-based leakage, and catastrophic forgetting.

Chahana Dahal, A. Balasubramaniam, Zuo-Bin Xiong · 1 citation

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