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This paper proposes a new topology optimization method that applies a convolutional neural network (CNN), which is one deep learning technique for topology optimization problems. Using this method, we acquire a structure with a little…

机器学习 · 计算机科学 2020-01-06 Yusuke Takahashi , Yoshiro Suzuki , Akira Todoroki

Our study aims to elucidate both short-term and long-term variations in the light curve of the eclipsing system OGLE-LMC-ECL-14413, with a particular focus on the unusual reversals in eclipse depth. We aim to clarify the role of the…

We present a technique to determine the orbital and physical parameters of eclipsing eccentric Wolf-Rayet + O-star binaries, where one eclipse is produced by the absorption of the O-star light by the stellar wind of the W-R star. Our method…

太阳与恒星天体物理 · 物理学 2015-05-13 C. Perrier , J. Breysacher , G. Rauw

We derive analytic, closed form, numerically stable solutions for the total flux received from a spherical planet, moon or star during an occultation if the specific intensity map of the body is expressed as a sum of spherical harmonics.…

天体物理仪器与方法 · 物理学 2019-01-30 Rodrigo Luger , Eric Agol , Daniel Foreman-Mackey , David P. Fleming , Jacob Lustig-Yaeger , Russell Deitrick

We have adapted Coupled Escape Probability, a new exact method of solving radiative transfer problems, for use in asymmetrical spherical situations. Our model is intended specifically for use in modeling optically thick cometary comae,…

地球与行星天体物理 · 物理学 2012-12-07 Alan M. Gersch , Michael F. A'Hearn

We describe an efficient algorithm for calculating the statistics of weak lensing by large-scale structure based on a tiled set of independent particle-mesh N-body simulations which telescope in resolution along the line of sight. This…

天体物理学 · 物理学 2008-11-26 Martin White , Wayne Hu

Speckle is an intrinsic pattern in optical coherence tomography (OCT) that obscures fine image features and degrades effective resolution. In this study, we propose a numerical speckle reduction method based on the dispersed scatterer model…

At early times dark matter has a thermal velocity dispersion of unknown amplitude which, for warm dark matter models, can influence the formation of nonlinear structure on observable scales. We propose a new scheme to simulate cosmologies…

宇宙学与河外天体物理 · 物理学 2020-06-10 Jens Stücker , Oliver Hahn , Raul E. Angulo , Simon D. M. White

In this paper, we present a novel reconstruction method for diffuse optical spectroscopic imaging with a commonly used tissue model of optical absorption and scattering. It is based on linearization and group sparsity, which allows…

数值分析 · 数学 2019-03-06 Habib Ammari , Bangti Jin , Wenlong Zhang

Speckle Imaging based on triple correlation is a very efficient image reconstruction technique which is used to retrieve Fourier phase information of the object in presence of atmospheric turbulence. We have developed both Direct Bispectrum…

天体物理仪器与方法 · 物理学 2014-09-17 Arun Surya , Swapan K. Saha

Reconstructing a complete object from its parts is a fundamental problem in many scientific domains. The purpose of this article is to provide a systematic survey on this topic. The reassembly problem requires understanding the attributes…

计算机视觉与模式识别 · 计算机科学 2025-03-28 Jiaxin Lu , Yongqing Liang , Huijun Han , Jiacheng Hua , Junfeng Jiang , Xin Li , Qixing Huang

Conventional imaging requires a line of sight to create accurate visual representations of a scene. In certain circumstances, however, obtaining a suitable line of sight may be impractical, dangerous, or even impossible. Non-line-of-sight…

计算机视觉与模式识别 · 计算机科学 2026-01-21 Fadlullah Raji , John Murray-Bruce

Detecting topological order in cold-atom experiments is an ongoing challenge, the resolution of which offers novel perspectives on topological matter. In material systems, unambiguous signatures of topological order exist for topological…

量子气体 · 物理学 2013-04-25 N. Goldman , J. Dalibard , A. Dauphin , F. Gerbier , M. Lewenstein , P. Zoller , I. B. Spielman

The results of a search for sub-km Kuiper Belt Objects (KBOs) with the method of serendipitous stellar occultations are reported. Photometric time series were obtained on the 1.8m telescope at the Dominion Astrophysical Observatory (DAO) in…

天体物理学 · 物理学 2009-11-13 S. J. Bickerton , J. J. Kavelaars , D. L. Welch

We present a new, simple, fast algorithm to numerically evolve disks of inelastically colliding particles surrounding a central star. Our algorithm adds negligible computational cost to the fastest existing collisionless N-body codes, and…

天体物理学 · 物理学 2008-11-26 Yoram Lithwick , Eugene Chiang

To prepare for the analyses of the future PLATO light curves, we develop a deep learning model, Panopticon, to detect transits in high precision photometric light curves. Since PLATO's main objective is the detection of temperate Earth-size…

地球与行星天体物理 · 物理学 2025-02-26 H. G. Vivien , M. Deleuil , N. Jannsen , J. De Ridder , D. Seynaeve , M. -A. Carpine , Y. Zerah

Statistical analyses of observed galaxy distortions are often used to reconstruct the mass distribution of an intervening cluster responsible for gravitational lensing. In current projects, distortions of thousands of source galaxies have…

天体物理学 · 物理学 2007-05-23 Marco Lombardi , Giuseppe Bertin

To fully understand the 3D context of a single image, a visual system must be able to segment both the visible and occluded regions of objects, while discerning their occlusion order. Ideally, the system should be able to handle any object…

计算机视觉与模式识别 · 计算机科学 2024-05-10 Jiayang Ao , Qiuhong Ke , Krista A. Ehinger

Image reconstruction under multiple light scattering is crucial in a number of applications such as diffraction tomography. The reconstruction problem is often formulated as a nonconvex optimization, where a nonlinear measurement model is…

计算机视觉与模式识别 · 计算机科学 2018-07-04 Yu Sun , Zhihao Xia , Ulugbek S. Kamilov

The primary aim of this research is to evaluate several convolutional neural network-based object detection algorithms for identifying oscillation-like patterns in light curves of eclipsing binaries. This involves creating a robust…

太阳与恒星天体物理 · 物理学 2025-01-30 Burak Ulaş , Tamás Szklenár , Róbert Szabó
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