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Safe reinforcement learning (RL) aims to learn policies that satisfy certain constraints before deploying them to safety-critical applications. Previous primal-dual style approaches suffer from instability issues and lack optimality…

机器学习 · 计算机科学 2022-06-20 Zuxin Liu , Zhepeng Cen , Vladislav Isenbaev , Wei Liu , Zhiwei Steven Wu , Bo Li , Ding Zhao

Three-dimensional (3D) reconstruction of head Computed Tomography (CT) images elucidates the intricate spatial relationships of tissue structures, thereby assisting in accurate diagnosis. Nonetheless, securing an optimal head CT scan…

计算机视觉与模式识别 · 计算机科学 2023-09-18 Bowen Zheng , Chenxi Huang , Yuemei Luo

We consider the high-dimensional discriminant analysis problem. For this problem, different methods have been proposed and justified by establishing exact convergence rates for the classification risk, as well as the l2 convergence results…

机器学习 · 统计学 2013-06-28 Mladen Kolar , Han Liu

This paper focuses on minimizing the time requirement for CT capture through innovative simultaneous x-ray capture method. The state-of-the-art CT imaging methodology captures a sequence of projections during which the internal organ…

医学物理 · 物理学 2014-04-03 Sajib Saha , Murat Tahtali , Andrew Lambert , Mark Pickering

Since the dawn of scanning probe microscopy (SPM), tapping or intermittent contact mode has been one of the most widely used imaging modes. Manual optimization of tapping mode not only takes a lot of instrument and operator time, but also…

Overranging or overscanning increases the dose delivered to patients undergoing helical Computed Tomography examinations. In order to reduce it, nowadays most of the multidetector tomographs close the X-ray beam aperture at the scan…

医学物理 · 物理学 2014-06-04 Diego Trevisan , Faustino Bonutti , Daniele Ravanelli , Aldo Valentini

Optimizing accelerator control is a critical challenge in experimental particle physics, requiring significant manual effort and resource expenditure. Traditional tuning methods are often time-consuming and reliant on expert input,…

加速器物理 · 物理学 2026-01-27 Anwar Ibrahim , Denis Derkach , Alexey Petrenko , Fedor Ratnikov , Maxim Kaledin

Sparse learning is a very important tool for mining useful information and patterns from high dimensional data. Non-convex non-smooth regularized learning problems play essential roles in sparse learning, and have drawn extensive attentions…

机器学习 · 计算机科学 2020-10-22 Guannan Liang , Qianqian Tong , Jiahao Ding , Miao Pan , Jinbo Bi

Recently, sparse autoencoders (SAEs) have emerged as a promising technique for interpreting activations in foundation models by disentangling features into a sparse set of concepts. However, identifying the optimal level of sparsity for…

机器学习 · 计算机科学 2026-04-17 Dongsheng Wang , Jinsen Zhang , Dawei Su , Hui Huang

X-ray imaging is the most popular medical imaging technology. While x-ray radiography is rather cost-effective, tissue structures are superimposed along the x-ray paths. On the other hand, computed tomography (CT) reconstructs internal…

医学物理 · 物理学 2021-12-01 Chuang Niu , Ge Wang

Autonomous driving at intersections is one of the most complicated and accident-prone traffic scenarios, especially with mixed traffic participants such as vehicles, bicycles and pedestrians. The driving policy should make safe decisions to…

机器学习 · 计算机科学 2022-04-27 Jianhua Jiang , Yangang Ren , Yang Guan , Shengbo Eben Li , Yuming Yin , Xiaoping Jin

Industrial surface defect inspection for sample-wise quality control (QC) must simultaneously decide whether a given sample contains defects and localize those defects spatially. In real production lines, extreme foreground-background…

计算机视觉与模式识别 · 计算机科学 2025-10-16 Hang-Cheng Dong , Yibo Jiao , Fupeng Wei , Guodong Liu , Dong Ye , Bingguo Liu

Deep learning has the potential to revolutionize medical practice by automating and performing important tasks like detecting and delineating the size and locations of cancers in medical images. However, most deep learning models rely on…

图像与视频处理 · 电气工程与系统科学 2023-11-28 Eirik A. Østmo , Kristoffer K. Wickstrøm , Keyur Radiya , Michael C. Kampffmeyer , Robert Jenssen

Intelligent robots provide a new insight into efficiency improvement in industrial and service scenarios to replace human labor. However, these scenarios include dense and dynamic obstacles that make motion planning of robots challenging.…

机器人学 · 计算机科学 2021-02-08 Chengmin Zhou , Bingding Huang , Pasi Fränti

Sparse neural retrievers, such as DeepImpact, uniCOIL and SPLADE, have been introduced recently as an efficient and effective way to perform retrieval with inverted indexes. They aim to learn term importance and, in some cases, document…

信息检索 · 计算机科学 2023-04-26 Carlos Lassance , Simon Lupart , Hervé Dejean , Stéphane Clinchant , Nicola Tonellotto

Computed Tomography (CT) is a non-invasive imaging modality with applications ranging from healthcare to security. It reconstructs cross-sectional images of an object using a collection of projection data collected at different angles.…

图像与视频处理 · 电气工程与系统科学 2019-09-04 Muhammad Usman Ghani , W. Clem Karl

In this paper, we investigate dynamic feature selection within multivariate time-series scenario, a common occurrence in clinical prediction monitoring where each feature corresponds to a bio-test result. Many existing feature selection…

机器学习 · 计算机科学 2024-05-31 Yutong Chen , Jiandong Gao , Ji Wu

The use of deep learning has successfully solved several problems in the field of medical imaging. Deep learning has been applied to the CT denoising problem successfully. However, the use of deep learning requires large amounts of data to…

图像与视频处理 · 电气工程与系统科学 2022-04-04 Mayank Patwari , Ralf Gutjahr , Rainer Raupach , Andreas Maier

We present a novel feature selection technique, Sparse Linear Centroid-Encoder (SLCE). The algorithm uses a linear transformation to reconstruct a point as its class centroid and, at the same time, uses the $\ell_1$-norm penalty to filter…

机器学习 · 计算机科学 2023-06-12 Tomojit Ghosh , Michael Kirby , Karim Karimov

Deep convolutional neural networks (CNNs) have shown excellent performance in object recognition tasks and dense classification problems such as semantic segmentation. However, training deep neural networks on large and sparse datasets is…

计算机视觉与模式识别 · 计算机科学 2017-12-25 Lorenz Berger , Eoin Hyde , M. Jorge Cardoso , Sebastien Ourselin