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Objective: Interventional MRI (i-MRI) is crucial for MR image-guided therapy. Current image reconstruction methods for dynamic MR imaging are mostly retrospective that may not be suitable for i-MRI in real-time. Therefore, an algorithm to…

Medical Physics · Physics 2021-07-27 Zhao He , Ya-Nan Zhu , Suhao Qiu , Xiaoqun Zhang , Yuan Feng

To better select the correct training sample and obtain the robust representation of the query sample, this paper proposes a discriminant-based sparse optimization learning model. This learning model integrates discriminant and sparsity…

Computer Vision and Pattern Recognition · Computer Science 2017-12-06 Qingxiang Feng , Yicong Zhou

Low-rank and sparse composite approximation is a natural idea to compress Large Language Models (LLMs). However, such an idea faces two primary challenges that adversely affect the performance of existing methods. The first challenge…

Machine Learning · Computer Science 2026-02-27 Changhai Zhou , Qian Qiao , Yuhua Zhou , Yuxin Wu , Shichao Weng , Weizhong Zhang , Cheng Jin

Predicting the trajectories of surrounding objects is a critical task for self-driving vehicles and many other autonomous systems. Recent works demonstrate that adversarial attacks on trajectory prediction, where small crafted perturbations…

Machine Learning · Computer Science 2023-03-22 Ruochen Jiao , Xiangguo Liu , Takami Sato , Qi Alfred Chen , Qi Zhu

Deep neural network image classifiers are reported to be susceptible to adversarial evasion attacks, which use carefully crafted images created to mislead a classifier. Many adversarial attacks belong to the category of dense attacks, which…

Computer Vision and Pattern Recognition · Computer Science 2022-02-22 He Zhao , Thanh Nguyen , Trung Le , Paul Montague , Olivier De Vel , Tamas Abraham , Dinh Phung

Deep representation learning has become one of the most widely adopted approaches for visual search, recommendation, and identification. Retrieval of such representations from a large database is however computationally challenging.…

Machine Learning · Computer Science 2020-04-14 Biswajit Paria , Chih-Kuan Yeh , Ian E. H. Yen , Ning Xu , Pradeep Ravikumar , Barnabás Póczos

In this paper, we propose an efficient semidefinite programming (SDP) approach to worst-case linear discriminant analysis (WLDA). Compared with the traditional LDA, WLDA considers the dimensionality reduction problem from the worst-case…

Machine Learning · Computer Science 2023-07-19 Hui Li , Chunhua Shen , Anton van den Hengel , Qinfeng Shi

The susceptibility of deep neural networks (DNNs) to adversarial examples has prompted an increase in the deployment of adversarial attacks. Image-agnostic universal adversarial perturbations (UAPs) are much more threatening, but many…

Computer Vision and Pattern Recognition · Computer Science 2023-08-15 Geunhyeok Yu , Minwoo Jeon , Hyoseok Hwang

Recent work has shown how easily white-box adversarial attacks can be applied to state-of-the-art image classifiers. However, real-life scenarios resemble more the black-box adversarial conditions, lacking transparency and usually imposing…

Cryptography and Security · Computer Science 2021-07-14 Andrei Ilie , Marius Popescu , Alin Stefanescu

We propose the Square Attack, a score-based black-box $l_2$- and $l_\infty$-adversarial attack that does not rely on local gradient information and thus is not affected by gradient masking. Square Attack is based on a randomized search…

Machine Learning · Computer Science 2020-07-30 Maksym Andriushchenko , Francesco Croce , Nicolas Flammarion , Matthias Hein

Learning from limited data is challenging because data scarcity leads to a poor generalization of the trained model. A classical global pooled representation will probably lose useful local information. Many few-shot learning methods have…

Computer Vision and Pattern Recognition · Computer Science 2023-05-11 Haoxing Chen , Huaxiong Li , Yaohui Li , Chunlin Chen

Differentiable neural architecture search (DARTS) is a popular method for neural architecture search (NAS), which performs cell-search and utilizes continuous relaxation to improve the search efficiency via gradient-based optimization. The…

Recently, the field of adversarial machine learning has been garnering attention by showing that state-of-the-art deep neural networks are vulnerable to adversarial examples, stemming from small perturbations being added to the input image.…

Machine Learning · Computer Science 2020-05-19 Ravi Raju , Mikko Lipasti

The complexity of high-dimensional datasets presents significant challenges for machine learning models, including overfitting, computational complexity, and difficulties in interpreting results. To address these challenges, it is essential…

Machine Learning · Computer Science 2023-08-01 Gaurav Srivastava , Mahesh Jangid

One major problem in black-box adversarial attacks is the high query complexity in the hard-label attack setting, where only the top-1 predicted label is available. In this paper, we propose a novel geometric-based approach called Tangent…

Computer Vision and Pattern Recognition · Computer Science 2022-03-01 Chen Ma , Xiangyu Guo , Li Chen , Jun-Hai Yong , Yisen Wang

Tensor decomposition (TD) is essential for analyzing high-dimensional sparse data, yet its irregular computations and memory-access patterns pose major performance challenges on modern parallel processors. Prior works rely on…

Machine Learning · Computer Science 2025-09-03 Ahmed E. Helal , Fabio Checconi , Jan Laukemann , Yongseok Soh , Jesmin Jahan Tithi , Fabrizio Petrini , Jee Choi

Adversarial Training (AT), which is commonly accepted as one of the most effective approaches defending against adversarial examples, can largely harm the standard performance, thus has limited usefulness on industrial-scale production and…

Computer Vision and Pattern Recognition · Computer Science 2022-09-19 Xiaofeng Mao , Yuefeng Chen , Ranjie Duan , Yao Zhu , Gege Qi , Shaokai Ye , Xiaodan Li , Rong Zhang , Hui Xue

Dynamic Mode Decomposition (DMD) yields a linear, approximate model of a system's dynamics that is built from data. We seek to reduce the order of this model by identifying a reduced set of modes that best fit the output. We adopt a model…

Machine Learning · Statistics 2020-01-20 John Graff , Xianzhang Xu , Francis D. Lagor , Tarunraj Singh

While large language models (LLMs) have achieved remarkable performance across a wide range of tasks, their massive scale incurs prohibitive computational and memory costs for pre-training from scratch. Recent studies have investigated the…

Machine Learning · Computer Science 2025-08-05 Jiaxi Li , Lu Yin , Li Shen , Jinjin Xu , Liwu Xu , Tianjin Huang , Wenwu Wang , Shiwei Liu , Xilu Wang

To mitigate the susceptibility of neural networks to adversarial attacks, adversarial training has emerged as a prevalent and effective defense strategy. Intrinsically, this countermeasure incurs a trade-off, as it sacrifices the model's…

Machine Learning · Computer Science 2024-09-19 Hanyi Hu , Qiao Han , Kui Chen , Yao Yang