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The Neutron-star Interior Composition ExploreR (NICER) is collecting data to measure the radii of neutron stars by observing the pulsed emission from their surfaces. The primary targets are isolated, rotation-powered pulsars, in which the…

高能天体物理现象 · 物理学 2019-02-27 Michi Baubock , Dimitrios Psaltis , Feryal Ozel

The transit method allows the detection and characterization of planetary systems by analyzing stellar light curves. Convolutional neural networks appear to offer a viable solution for automating these analyses. In this research, two 1D…

We propose a machine-learning-based technique to determine the number density of radio sources as a function of their flux density, for use in next-generation radio surveys. The method uses a convolutional neural network trained on…

天体物理仪器与方法 · 物理学 2024-01-17 Elisa Todarello , Andre Scaffidi , Marco Regis , Marco Taoso

Deep neural networks have revolutionized 3D point cloud processing, yet efficiently handling large and irregular point clouds remains challenging. To tackle this problem, we introduce FastPoint, a novel software-based acceleration technique…

计算机视觉与模式识别 · 计算机科学 2025-08-01 Donghyun Lee , Dawoon Jeong , Jae W. Lee , Hongil Yoon

We demonstrate that fitted values of stellar radius obtained by fitting theoretical light curves to observations of millisecond period X-ray pulsars can significantly depend on the method used to calculate the light curves. The worst-case…

天体物理学 · 物理学 2014-10-13 Coire Cadeau , Denis A. Leahy , Sharon M. Morsink

Recurrent Neural Networks (RNNs) are becoming increasingly important for time series-related applications which require efficient and real-time implementations. The recent pruning based work ESE suffers from degradation of…

机器学习 · 计算机科学 2018-03-26 Zhe Li , Shuo Wang , Caiwen Ding , Qinru Qiu , Yanzhi Wang , Yun Liang

State of the art methods in astronomical image reconstruction rely on the resolution of a regularized or constrained optimization problem. Solving this problem can be computationally intensive and usually leads to a quadratic or at least…

计算机视觉与模式识别 · 计算机科学 2017-06-08 Rémi Flamary

The study of physical processes associated with particle acceleration in the open field line region above the polar cap (PC) of an isolated neutron star (NS) plays a fundamental role in our understanding and interpretation of high-energy…

天体物理学 · 物理学 2007-05-23 Alice K. Harding , Alexander G. Muslimov

During the radiotherapy treatment of patients with lung cancer, the radiation delivered to healthy tissue around the tumor needs to be minimized, which is difficult because of respiratory motion and the latency of linear accelerator…

图像与视频处理 · 电气工程与系统科学 2022-07-14 Michel Pohl , Mitsuru Uesaka , Kazuyuki Demachi , Ritu Bhusal Chhatkuli

Reconstructing spectral functions from propagator data is difficult as solving the analytic continuation problem or applying an inverse integral transformation are ill-conditioned problems. Recent work has proposed using neural networks to…

高能物理 - 格点 · 物理学 2022-12-26 Thibault Lechien , David Dudal

Volumetric neural rendering methods like NeRF generate high-quality view synthesis results but are optimized per-scene leading to prohibitive reconstruction time. On the other hand, deep multi-view stereo methods can quickly reconstruct…

计算机视觉与模式识别 · 计算机科学 2023-03-17 Qiangeng Xu , Zexiang Xu , Julien Philip , Sai Bi , Zhixin Shu , Kalyan Sunkavalli , Ulrich Neumann

The availability of precise and accurate simulation is a limiting factor for interpreting and forecasting data in many fields of science and engineering. Often, one or more distinct simulation software applications are developed, each with…

高能物理 - 实验 · 物理学 2025-02-19 Moritz Wolf , Lars O. Stietz , Patrick L. S. Connor , Peter Schleper , Samuel Bein

Due to the lack of phase information, determining the physical parameters of multilayer thin films from measured neutron and X-ray reflectivity curves is, on a fundamental level, an underdetermined inverse problem. This so-called phase…

Machine learning, and eventually true artificial intelligence techniques, are extremely important advancements in astrophysics and astronomy. We explore the application of deep learning using neural networks in order to automate the…

天体物理仪器与方法 · 物理学 2020-12-29 James Bird , Kellan Colburn , Linda Petzold , Philip Lubin

The use of machine learning algorithms is an attractive way to produce very fast detector simulations for scattering reactions that can otherwise be computationally expensive. Here we develop a factorised approach where we deal with each…

数据分析、统计与概率 · 物理学 2022-07-26 D. Darulis , R. Tyson , D. G. Ireland , D. I. Glazier , B. McKinnon , P. Pauli

Context: New spectroscopic surveys will increase the number of astronomical objects requiring characterization by over tenfold.. Machine learning tools are required to address this data deluge in a fast and accurate fashion. Most machine…

In this study, we use Rational-Quadratic Neural Spline Flows, a sophisticated parametrization of Normalizing Flows, for inferring posterior probability distributions in scenarios where direct evaluation of the likelihood is challenging at…

数据分析、统计与概率 · 物理学 2024-01-26 Mathias El Baz , Federico Sánchez

Motivated by oceanographic observational datasets, we propose a probabilistic neural network (PNN) model for calculating turbulent energy dissipation rates from vertical columns of velocity and density gradients in density stratified…

流体动力学 · 物理学 2021-12-03 Sam F. Lewin , Stephen M. de Bruyn Kops , Gavin D. Portwood , Colm-cille P. Caulfield

The inference of physical parameters from measured distributions constitutes a core task in physics data analyses. Among recent deep learning methods, so-called conditional invertible neural networks provide an elegant approach owing to…

天体物理仪器与方法 · 物理学 2022-03-14 Teresa Bister , Martin Erdmann , Ullrich Köthe , Josina Schulte

The need of real-time of monitoring and alerting systems for Space Weather hazards has grown significantly in the last two decades. One of the most important challenge for space mission operations and planning is the prediction of solar…

太阳与恒星天体物理 · 物理学 2024-06-19 Mirko Stumpo , Monica Laurenza , Simone Benella , Maria Federica Marcucci