Search Results for author: Zihui Wu

Found 12 papers, 3 papers with code

The Dark Side of Function Calling: Pathways to Jailbreaking Large Language Models

1 code implementation25 Jul 2024 Zihui Wu, Haichang Gao, Jianping He, Ping Wang

Large language models (LLMs) have demonstrated remarkable capabilities, but their power comes with significant security considerations.

Principled Probabilistic Imaging using Diffusion Models as Plug-and-Play Priors

no code implementations29 May 2024 Zihui Wu, Yu Sun, Yifan Chen, Bingliang Zhang, Yisong Yue, Katherine L. Bouman

Diffusion models (DMs) have recently shown outstanding capability in modeling complex image distributions, making them expressive image priors for solving Bayesian inverse problems.

Denoising

Provable Probabilistic Imaging using Score-Based Generative Priors

1 code implementation16 Oct 2023 Yu Sun, Zihui Wu, Yifan Chen, Berthy T. Feng, Katherine L. Bouman

PMC is able to incorporate expressive score-based generative priors for high-quality image reconstruction while also performing uncertainty quantification via posterior sampling.

Denoising Image Reconstruction +1

Demystifying Oversmoothing in Attention-Based Graph Neural Networks

no code implementations NeurIPS 2023 Xinyi Wu, Amir Ajorlou, Zihui Wu, Ali Jadbabaie

Oversmoothing in Graph Neural Networks (GNNs) refers to the phenomenon where increasing network depth leads to homogeneous node representations.

Graph Attention

AdvFunMatch: When Consistent Teaching Meets Adversarial Robustness

no code implementations24 May 2023 Zihui Wu, Haichang Gao, Bingqian Zhou, Ping Wang

To tackle this problem, we propose a simple but effective strategy called Adversarial Function Matching (AdvFunMatch), which aims to match distributions for all data points within the $\ell_p$-norm ball of the training data, in accordance with consistent teaching.

Adversarial Robustness Knowledge Distillation

Learning Task-Specific Strategies for Accelerated MRI

no code implementations25 Apr 2023 Zihui Wu, Tianwei Yin, Yu Sun, Robert Frost, Andre van der Kouwe, Adrian V. Dalca, Katherine L. Bouman

Traditional CS-MRI methods often separately address measurement subsampling, image reconstruction, and task prediction, resulting in a suboptimal end-to-end performance.

Image Reconstruction

Lower Difficulty and Better Robustness: A Bregman Divergence Perspective for Adversarial Training

no code implementations26 Aug 2022 Zihui Wu, Haichang Gao, Bingqian Zhou, Xiaoyan Guo, Shudong Zhang

In addition, we discuss the function of entropy in TRADES, and we find that models with high entropy can be better robustness learners.

Adversarial Robustness

Alleviating Robust Overfitting of Adversarial Training With Consistency Regularization

no code implementations24 May 2022 Shudong Zhang, Haichang Gao, Tianwei Zhang, Yunyi Zhou, Zihui Wu

Adversarial training (AT) has proven to be one of the most effective ways to defend Deep Neural Networks (DNNs) against adversarial attacks.

Understanding the robustness-accuracy tradeoff by rethinking robust fairness

no code implementations29 Sep 2021 Zihui Wu, Haichang Gao, Shudong Zhang, Yipeng Gao

Then, we explored the effect of another classic smoothing regularizer, namely, the maximum entropy (ME), and we have found ME can also help reduce both inter-class similarity and intra-class variance.

Fairness

End-to-End Sequential Sampling and Reconstruction for MRI

1 code implementation13 May 2021 Tianwei Yin, Zihui Wu, He Sun, Adrian V. Dalca, Yisong Yue, Katherine L. Bouman

In this paper, we leverage the sequential nature of MRI measurements, and propose a fully differentiable framework that jointly learns a sequential sampling policy simultaneously with a reconstruction strategy.

Scalable Plug-and-Play ADMM with Convergence Guarantees

no code implementations5 Jun 2020 Yu Sun, Zihui Wu, Xiaojian Xu, Brendt Wohlberg, Ulugbek S. Kamilov

Plug-and-play priors (PnP) is a broadly applicable methodology for solving inverse problems by exploiting statistical priors specified as denoisers.

Online Regularization by Denoising with Applications to Phase Retrieval

no code implementations4 Sep 2019 Zihui Wu, Yu Sun, Jiaming Liu, Ulugbek S. Kamilov

Regularization by denoising (RED) is a powerful framework for solving imaging inverse problems.

Denoising Retrieval

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