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Li Sun

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Book Open access Aug 2026

Geometry-aware Test-Time Adaptation on Graphs

Test-time adaptation (TTA) has been a widely-studied paradigm for adapting well-trained models to distributionally shifted test data. Recent works extend TTA to graphs using graph augmentations and self-supervised objectives in Euclidean space. However, graph-structured data often exhibit heterogeneity where semantic s...

Ling-Wei Wei, Dou Hu, Li Sun et al. · 0 citations
Book Open access Aug 2026

From Generic Intelligence to Personalized AI: A Tutorial on Foundations of LLM Personalization

This tutorial provides a systematic overview of LLM personalization, covering core paradigms such as user-aware representations, prompt-based adaptation, memory augmentation, parameter-efficient fine-tuning, and continual learning.

Rui-Jie Wang, Qing-Kai Zeng, Xue-Fei Wang et al. · 0 citations
#machine learning Preprint Sep 2026

Trust-But-Verify: Poisoning-Resilient Locally Private Graph Learning Protocols

VERITAS is proposed, a poisoning-resilient locally private graph learning protocol built on a trust-but-verify paradigm that effectively defends against data poisoning attacks and significantly improves downstream graph learning utility under rigorous privacy guarantees.

Long-Zhu He, Li Sun, Hao Peng et al. · 0 citations
Jul 2026

Paying for Honesty Without Knowing the Truth: Reputation-Penalty Design for LLM Marketplace Agents

It is shown that this felt penalty becomes behaviorally binding through SPARC, a byte-clean code-gated reflection mechanism: LLM merchants fabricate when lying is free but restrain themselves when fabrication costs them sales, a self-interested response rather than compliance.

Mingdai Yang, Shichen Fan, Kejing Yu et al. · 1 citation
Review Open access Jul 2026

Differentially Private Graph Learning: A Survey

This survey presents the first comprehensive and systematic review of Differentially Private Graph Learning (DPGL), and organizes existing DPGL methods into four categories based on the granularity of privacy protection, namely node-level, edge-level, graph-level, and node-level.

Li Sun, Long-Zhu He, Ming Li et al. · 1 citation
Jul 2026

Toward Personalized Differentially Private Learning for Decentralized Local Graphs

PPGNN, a personalized differentially private framework for decentralized graph data, enables user-specific privacy budgets during local perturbation while preserving analytical utility in decentralized graph learning scenarios.

Longzhu He, Peng Tang, Chaozhuo Li et al. · 0 citations

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