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In long adaptive optics corrected exposures, exoplanet detections are currently limited by speckle noise originating from the telescope and instrument optics, and it is expected that such noise will also limit future high-contrast imaging…

天体物理学 · 物理学 2009-11-13 C. Marois , D. Lafreniere , B. Macintosh , R. Doyon

Graph contrastive learning (GCL) aims to align the positive features while differentiating the negative features in the latent space by minimizing a pair-wise contrastive loss. As the embodiment of an outstanding discriminative unsupervised…

机器学习 · 计算机科学 2023-12-27 Jiangmeng Li , Yifan Jin , Hang Gao , Wenwen Qiang , Changwen Zheng , Fuchun Sun

Evaluating the realism of generated images remains a fundamental challenge in generative modeling. Existing distributional metrics such as the Frechet Inception Distance (FID) and CLIP-MMD (CMMD) compare feature distributions at a semantic…

计算机视觉与模式识别 · 计算机科学 2026-04-06 Joé Napolitano , Pascal Nguyen

A convergence result for a discontinuous Galerkin multiscale method for a second order elliptic problem is presented. We consider a heterogeneous and highly varying diffusion coefficient in $L^\infty(\Omega,\mathbb{R}^{d\times d}_{sym})$…

Weak gravitational lensing is a powerful probe of cosmology, with second-order shear statistics commonly used to constrain parameters such as the matter density $\Omega_\mathrm{m}$ and the clustering amplitude $S_8$. However, parameter…

宇宙学与河外天体物理 · 物理学 2025-09-26 Niek Wielders , Laila Linke , Pierre A. Burger , Sven Heydenreich , Lucas Porth , Peter Schneider

GPU architectural simulation is orders of magnitude slower than native execution, necessitating workload sampling for practical speedups. Existing methods rely on hand-crafted features with limited expressiveness, yielding either aggressive…

性能 · 计算机科学 2026-03-03 Jiaqi Wang , Jingwei Sun , Jiyu Luo , Han Li , Guangzhong Sun

Recently many efforts have been devoted to applying graph neural networks (GNNs) to molecular property prediction which is a fundamental task for computational drug and material discovery. One of major obstacles to hinder the successful…

机器学习 · 计算机科学 2021-09-27 Shuangli Li , Jingbo Zhou , Tong Xu , Dejing Dou , Hui Xiong

Local learning of sparse image models has proven to be very effective to solve inverse problems in many computer vision applications. To learn such models, the data samples are often clustered using the K-means algorithm with the Euclidean…

计算机视觉与模式识别 · 计算机科学 2016-04-20 Julio Cesar Ferreira , Elif Vural , Christine Guillemot

Density modeling is notoriously difficult for high dimensional data. One approach to the problem is to search for a lower dimensional manifold which captures the main characteristics of the data. Recently, the Gaussian Process Latent…

机器学习 · 统计学 2010-07-14 Hannes Nickisch , Carl Edward Rasmussen

Weak gravitational lensing has become a common tool to constrain the cosmological model. The majority of the methods to derive constraints on cosmological parameters use second-order statistics of the cosmic shear. Despite their success,…

宇宙学与河外天体物理 · 物理学 2015-06-04 Sandrine Pires , Adrienne Leonard , Jean-Luc Starck

Immersive Computer Graphics (CGs) rendering has become ubiquitous in modern daily life. However, comprehensively evaluating CG quality remains challenging for two reasons: First, existing CG datasets lack systematic descriptions of…

计算机视觉与模式识别 · 计算机科学 2026-03-12 Zhuangzi Li , Jian Jin , Shilv Cai , Weisi Lin

The Gaussian scale mixture model (GSM) is a simple yet powerful probabilistic generative model of natural image patches. In line with the well-established idea that sensory processing is adapted to the statistics of the natural environment,…

定量方法 · 定量生物学 2017-11-29 Rodrigo Echeveste , Guillaume Hennequin , Máté Lengyel

In this work, we employ the Constraint Energy Minimizing Generalized Multiscale Finite Element Method (CEM-GMsFEM) to solve the problem of linear heterogeneous poroelasticity with coefficients of high contrast. The proposed method makes use…

数值分析 · 数学 2019-09-04 Shubin Fu , Robert Altmann , Eric T. Chung , Roland Maier , Daniel Peterseim , Sai-Mang Pun

The recent emergence of contrastive learning approaches facilitates the application on graph representation learning (GRL), introducing graph contrastive learning (GCL) into the literature. These methods contrast semantically similar and…

机器学习 · 计算机科学 2022-06-03 Ganqu Cui , Yufeng Du , Cheng Yang , Jie Zhou , Liang Xu , Xing Zhou , Xingyi Cheng , Zhiyuan Liu

Event cameras are bio-inspired sensors that perform well in HDR conditions and have high temporal resolution. However, different from traditional frame-based cameras, event cameras measure asynchronous pixel-level brightness changes and…

计算机视觉与模式识别 · 计算机科学 2022-03-09 Xin Peng , Yifu Wang , Ling Gao , Laurent Kneip

The weak gravitational lensing effect, small coherent distortions of galaxy images by means of a gravitational tidal field, can be used to study the relation between the matter and galaxy distribution. In this context, weak lensing has so…

天体物理学 · 物理学 2014-11-18 P. Simon , P. Watts , P. Schneider , H. Hoekstra , M. D. Gladders , H. K. C. Yee , B. C. Hsieh , H. Lin

The susceptibility-based positive contrast MR technique was applied to estimate arbitrary magnetic susceptibility distributions of the metallic devices using a kernel deconvolution algorithm with a regularized L-1 minimization.Previously,…

医学物理 · 物理学 2020-06-18 Haifeng Wang , Fang Cai , Caiyun Shi , Jing Cheng , Shi Su , Zhilang Qiu , Guoxi Xie , Hanwei Chen , Xin Liu , Dong Liang

We establish new theoretical convergence guarantees for the difference-of-convex algorithm (DCA), where the second function is allowed to be weakly-convex, measuring progress via composite gradient mapping. Based on a tight analysis of two…

最优化与控制 · 数学 2026-01-23 Teodor Rotaru , Panagiotis Patrinos , François Glineur

Most scene graph parsers use a two-stage pipeline to detect visual relationships: the first stage detects entities, and the second predicts the predicate for each entity pair using a softmax distribution. We find that such pipelines,…

计算机视觉与模式识别 · 计算机科学 2019-08-20 Ji Zhang , Kevin J. Shih , Ahmed Elgammal , Andrew Tao , Bryan Catanzaro

Even after over two decades, the total variation (TV) remains one of the most popular regularizations for image processing problems and has sparked a tremendous amount of research, particularly to move from scalar to vector-valued…

计算机视觉与模式识别 · 计算机科学 2016-06-21 Joan Duran , Michael Moeller , Catalina Sbert , Daniel Cremers