Search Results for author: Qingming Li

Found 13 papers, 2 papers with code

Fine-tuning is Not Fine: Mitigating Backdoor Attacks in GNNs with Limited Clean Data

no code implementations10 Jan 2025 Jiale Zhang, Bosen Rao, Chengcheng Zhu, Xiaobing Sun, Qingming Li, Haibo Hu, Xiapu Luo, Qingqing Ye, Shouling Ji

By adopting the graph attention transfer method, GRAPHNAD can effectively align the intermediate-layer attention representations of the backdoored model with that of the teacher model, forcing the backdoor neurons to transform into benign ones.

Graph Attention

AEIOU: A Unified Defense Framework against NSFW Prompts in Text-to-Image Models

no code implementations24 Dec 2024 Yiming Wang, Jiahao Chen, Qingming Li, Xing Yang, Shouling Ji

As text-to-image (T2I) models continue to advance and gain widespread adoption, their associated safety issues are becoming increasingly prominent.

Data Augmentation

Navigating the Risks: A Survey of Security, Privacy, and Ethics Threats in LLM-Based Agents

no code implementations14 Nov 2024 Yuyou Gan, Yong Yang, Zhe Ma, Ping He, Rui Zeng, Yiming Wang, Qingming Li, Chunyi Zhou, Songze Li, Ting Wang, Yunjun Gao, Yingcai Wu, Shouling Ji

To enhance the reliability of LLM-based applications, a range of research has emerged to assess and mitigate these risks from different perspectives.

Ethics

Differential Private Stochastic Optimization with Heavy-tailed Data: Towards Optimal Rates

no code implementations19 Aug 2024 Puning Zhao, Jiafei Wu, Zhe Liu, Chong Wang, Rongfei Fan, Qingming Li

The main obstacle is that existing gradient estimators have suboptimal tail properties, resulting in a superfluous factor of $d$ in the union bound.

Stochastic Optimization

Enhancing Learning with Label Differential Privacy by Vector Approximation

no code implementations24 May 2024 Puning Zhao, Rongfei Fan, Huiwen Wu, Qingming Li, Jiafei Wu, Zhe Liu

Label differential privacy (DP) is a framework that protects the privacy of labels in training datasets, while the feature vectors are public.

Emulating Full Client Participation: A Long-Term Client Selection Strategy for Federated Learning

no code implementations22 May 2024 Qingming Li, Juzheng Miao, Puning Zhao, Li Zhou, Shouling Ji, BoWen Zhou, Furui Liu

In this study, we propose a novel client selection strategy designed to emulate the performance achieved with full client participation.

Fairness Federated Learning

A Huber Loss Minimization Approach to Mean Estimation under User-level Differential Privacy

no code implementations22 May 2024 Puning Zhao, Lifeng Lai, Li Shen, Qingming Li, Jiafei Wu, Zhe Liu

We provide a theoretical analysis of our approach, which gives the noise strength needed for privacy protection, as well as the bound of mean squared error.

Pacos: Modeling Users' Interpretable and Context-Dependent Choices in Preference Reversals

no code implementations10 Mar 2023 Qingming Li, H. Vicky Zhao

Choice problems refer to selecting the best choices from several items, and learning users' preferences in choice problems is of great significance in understanding the decision making mechanisms and providing personalized services.

Decision Making

Probe: Learning Users' Personalized Projection Bias in Intertemporal Choices

no code implementations9 Mar 2023 Qingming Li, H. Vicky Zhao

In this work, we specifically focus on two commonly observed biases: projection bias and the reference-point effect.

Decision Making

A homogenized damping model for the propagation of elastic wave in a porous solid

no code implementations16 Feb 2021 Kangpei Meng, Qingming Li

This paper develops an averaging technique based on the combination of the eigenfunction expansion method and the collaboration method to investigate the multiple scattering effect of the SH wave propagation in a porous medium.

Numerical Analysis Materials Science Statistical Mechanics Numerical Analysis 14J60 (Primary) 14F05, 14J26 (Secondary) F.2.2; I.2.7

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