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The average convergence rate (ACR) measures how fast the approximation error of an evolutionary algorithm converges to zero per generation. It is defined as the geometric average of the reduction rate of the approximation error over…

神经与进化计算 · 计算机科学 2021-07-13 Yu Chen , Jun He

Adversarial examples pose a security threat to many critical systems built on neural networks (such as face recognition systems, and self-driving cars). While many methods have been proposed to build robust models, how to build certifiably…

机器学习 · 计算机科学 2023-09-06 Ruihan Zhang , Peixin Zhang , Jun Sun

Variational regularization has remained one of the most successful approaches for reconstruction in imaging inverse problems for several decades. With the emergence and astonishing success of deep learning in recent years, a considerable…

机器学习 · 计算机科学 2021-10-26 Subhadip Mukherjee , Carola-Bibiane Schönlieb , Martin Burger

In this paper, we address a crucial but often overlooked issue in applying reinforcement learning (RL) to radio resource management (RRM) in wireless communications: the mismatch between the discounted reward RL formulation and the…

信息论 · 计算机科学 2025-01-14 Kun Yang , Jing Yang , Cong Shen

Deep neural networks are susceptible to adversarial examples, posing a significant security risk in critical applications. Adversarial Training (AT) is a well-established technique to enhance adversarial robustness, but it often comes at…

机器学习 · 计算机科学 2023-08-08 Kaijie Zhu , Jindong Wang , Xixu Hu , Xing Xie , Ge Yang

Adversarial attacks pose significant threats to deploying state-of-the-art classifiers in safety-critical applications. Two classes of methods have emerged to address this issue: empirical defences and certified defences. Although certified…

机器学习 · 计算机科学 2023-06-13 Piersilvio De Bartolomeis , Jacob Clarysse , Amartya Sanyal , Fanny Yang

This paper proposes a novel, abstraction-based, certified training method for robust image classifiers. Via abstraction, all perturbed images are mapped into intervals before feeding into neural networks for training. By training on…

计算机视觉与模式识别 · 计算机科学 2023-03-22 Zhaodi Zhang , Zhiyi Xue , Yang Chen , Si Liu , Yueling Zhang , Jing Liu , Min Zhang

Deep learning models achieve strong performance in chest radiograph (CXR) interpretation, yet fairness and reliability concerns persist. Models often show uneven accuracy across patient subgroups, leading to hidden failures not reflected in…

计算机视觉与模式识别 · 计算机科学 2025-10-03 Han-Jay Shu , Wei-Ning Chiu , Shun-Ting Chang , Meng-Ping Huang , Takeshi Tohyama , Ahram Han , Po-Chih Kuo

Image classifiers often suffer from adversarial examples, which are generated by strategically adding a small amount of noise to input images to trick classifiers into misclassification. Over the years, many defense mechanisms have been…

机器学习 · 计算机科学 2020-01-22 Huangyi Ge , Sze Yiu Chau , Bruno Ribeiro , Ninghui Li

Sample average approximation (SAA) is a widely popular approach to data-driven decision-making under uncertainty. Under mild assumptions, SAA is both tractable and enjoys strong asymptotic performance guarantees. Similar guarantees,…

最优化与控制 · 数学 2016-11-03 Dimitris Bertsimas , Vishal Gupta , Nathan Kallus

Deep neural networks are known to be vulnerable to adversarial attacks. Current methods of defense from such attacks are based on either implicit or explicit regularization, e.g., adversarial training. Randomized smoothing, the averaging of…

Deep neural networks have proven to be extremely powerful, however, they are also vulnerable to adversarial attacks which can cause hazardous incorrect predictions in safety-critical applications. Certified robustness via randomized…

机器学习 · 计算机科学 2024-10-29 Sina Däubener , Kira Maag , David Krueger , Asja Fischer

Fine-tuning has become a popular approach to adapting large foundational models to specific tasks. As the size of models and datasets grows, parameter-efficient fine-tuning techniques are increasingly important. One of the most widely used…

Randomized experiments are considered the gold standard for estimating causal effects. However, out of the set of possible randomized assignments, some may be likely to produce poor effect estimates and misleading conclusions. Restricted…

统计方法学 · 统计学 2025-08-28 Maggie Wang , René F. Kizilcec , Michael Baiocchi

Consistency regularization is a commonly-used technique for semi-supervised and self-supervised learning. It is an auxiliary objective function that encourages the prediction of the network to be similar in the vicinity of the observed…

机器学习 · 计算机科学 2021-10-05 Erik Englesson , Hossein Azizpour

With a focus on linear models with smooth functional covariates, we propose a penalization framework (SACR) based on the nonzero centered ridge, where the center of the penalty is optimally reweighted in a supervised way, starting from the…

统计方法学 · 统计学 2020-11-03 Edoardo Belli

Deep neural networks are incredibly vulnerable to crafted, human-imperceptible adversarial perturbations. Although adversarial training (AT) has proven to be an effective defense approach, we find that the AT-trained models heavily rely on…

计算机视觉与模式识别 · 计算机科学 2022-12-27 Binxiao Huang , Chaofan Tao , Rui Lin , Ngai Wong

Randomized Smoothing (RS) is currently a scalable certified defense method providing robustness certification against adversarial examples. Although significant progress has been achieved in providing defenses against $\ell_p$ adversaries,…

机器学习 · 计算机科学 2024-06-06 Youwei Shu , Xi Xiao , Derui Wang , Yuxin Cao , Siji Chen , Jason Xue , Linyi Li , Bo Li

The accumulation of time-series signals and the absence of labels make time-series Anomaly Detection (AD) a self-supervised task of deep learning. Methods based on normality assumptions face the following three limitations: (1) A single…

机器学习 · 计算机科学 2025-03-25 Xudong Mou , Rui Wang , Bo Li , Tianyu Wo , Jie Sun , Hui Wang , Xudong Liu

A major challenge to out-of-distribution generalization is reliance on spurious features -- patterns that are predictive of the class label in the training data distribution, but not causally related to the target. Standard methods for…

机器学习 · 计算机科学 2023-06-21 Shikai Qiu , Andres Potapczynski , Pavel Izmailov , Andrew Gordon Wilson