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Accurate waveform models describing the complete evolution of compact binaries are crucial for the maximum likelihood detection framework, testing the predictions of General Relativity (GR) and investigating the possibility of an…

广义相对论与量子宇宙学 · 物理学 2023-02-01 Harsh Narola , Soumen Roy , Anand S. Sengupta

In the Wireless Localization Matching Problem (WLMP) the challenge is to match pieces of equipment with a set of candidate locations based on wireless signal measurements taken by the pieces of equipment. This challenge is complicated by…

信号处理 · 电气工程与系统科学 2019-08-15 Amin Ghafourian , Orestis Georgiou , Edmund Barter , Thilo Gross

We investigate synthesis of a large effective aperture using a sparse array of subarrays. We employ a multi-objective optimization framework for placement of subarrays within a prescribed area dictated by form factor constraints, trading…

信号处理 · 电气工程与系统科学 2019-12-17 Anant Gupta , Upamanyu Madhow , Amin Arbabian , Ali Sadri

Near-Periodic Patterns (NPP) are ubiquitous in man-made scenes and are composed of tiled motifs with appearance differences caused by lighting, defects, or design elements. A good NPP representation is useful for many applications including…

计算机视觉与模式识别 · 计算机科学 2022-08-29 Bowei Chen , Tiancheng Zhi , Martial Hebert , Srinivasa G. Narasimhan

Formation rates of compact-object binaries are often derived from population synthesis calculations. However, such calculations depend sensitively on a relatively large number of model input parameters. Given considerable uncertainty in…

天体物理学 · 物理学 2009-04-03 R. O'Shaughnessy , V. Kalogera , K. Belczynski

Most all-sky searches for continuous gravitational waves assume the source to be isolated. In this paper, we allow for an unknown companion object in a long-period orbit and opportunistically use previous results from an all-sky search for…

广义相对论与量子宇宙学 · 物理学 2023-03-24 Avneet Singh , Maria Alessandra Papa

Gravitational-wave signals from black-hole binaries with non-precessing spins are described by four parameters -- each black hole's mass and spin. It has been shown that the dominant spin effects can be modeled by a \emph{single} spin…

广义相对论与量子宇宙学 · 物理学 2013-09-11 Michael Pürrer , Mark Hannam , P. Ajith , Sascha Husa

Gravitational waves (GWs) emitted by generic black-hole binaries show a rich structure that directly reflects the complex dynamics introduced by the precession of the orbital plane, which poses a real challenge to the development of generic…

广义相对论与量子宇宙学 · 物理学 2015-06-22 Patricia Schmidt , Frank Ohme , Mark Hannam

A novel method nicknamed ELASTIC is proposed for the alignment of multiple-aperture telescopes, in particular segmented telescopes. It only needs the acquisition of two diversity images of an unresolved source, and is based on the…

天体物理仪器与方法 · 物理学 2017-08-02 S. Vievard , F. Cassaing , L. M. Mugnier

Rapid identification, characterization, and localization of gravitational waves from binary compact object mergers can enable well-informed follow-on multimessenger observations. In this work, we investigate a small modification to the RIFT…

广义相对论与量子宇宙学 · 物理学 2023-01-05 A. B. Yelikar , V. Delfavero , R. O'Shaughnessy

Implicit neural representations (INRs) are increasingly being used as tools to map coordinates to signals, encompassing applications from neural fields to texture compression, shape representations, and beyond. Most INR methods are based on…

计算机视觉与模式识别 · 计算机科学 2026-04-28 Guillaume Perez , Janarbek Matai , Takahiro Harada

We study the efficiency of nonspinning waveform templates in gravitational wave searches for aligned-spin binary black holes (BBHs). We use PhenomD, which is the most recent phenomenological waveform model designed to generate the full…

广义相对论与量子宇宙学 · 物理学 2017-01-04 Hee-Suk Cho

In this paper, we address the problem of landmark-based visual place recognition. In the state-of-the-art method, accurate object proposal algorithms are first leveraged for generating a set of local regions containing particular landmarks…

机器人学 · 计算机科学 2018-08-24 Bo Yang , Jun Li , Xiaosu Xu , Hong Zhang

Previous methods solve feature matching and pose estimation using a two-stage process by first finding matches and then estimating the pose. As they ignore the geometric relationships between the two tasks, they focus on either improving…

计算机视觉与模式识别 · 计算机科学 2023-06-13 Fei Xue , Ignas Budvytis , Roberto Cipolla

Covariance tapering is a popular approach for reducing the computational cost of spatial prediction and parameter estimation for Gaussian process models. However, tapering can have poor performance when the process is sampled at spatially…

统计计算 · 统计学 2016-02-22 David Bolin , Jonas Wallin

Detection template families (DTFs) are built to capture the essential features of true gravitational waveforms using a small set of phenomenological waveform parameters. Buonanno, Chen, and Vallisneri [Phys. Rev. D 67, 104025 (2003)]…

广义相对论与量子宇宙学 · 物理学 2013-05-29 Alessandra Buonanno , Yanbei Chen , Yi Pan , Hideyuki Tagoshi , Michele Vallisneri

The detection of the gravitational waves (GWs) emitted by precessing binaries of spinning compact objects is complicated by the large number of parameters (such as the magnitudes and initial directions of the spins, and the position and…

广义相对论与量子宇宙学 · 物理学 2014-11-17 Yi Pan , Alessandra Buonanno , Yanbei Chen , Michele Vallisneri

Modern deep learning-based recommendation systems exploit hundreds to thousands of different categorical features, each with millions of different categories ranging from clicks to posts. To respect the natural diversity within the…

机器学习 · 计算机科学 2020-06-30 Hao-Jun Michael Shi , Dheevatsa Mudigere , Maxim Naumov , Jiyan Yang

In this paper, a new iterative two-level algorithm is presented for solving the finite element discretization for nonsymmetric or indefinite elliptic problems. The iterative two-level algorithm uses the same coarse space as the traditional…

数值分析 · 数学 2023-01-05 Ming Tang , Xiaoqing Xing , Ying Yang , Liuqiang Zhong

Interferometers require accurate determination of the array configuration in order to produce reliable observations. A method is presented for finding the maximum-likelihood estimate of the telescope geometry, and of other instrumental…

天体物理学 · 物理学 2009-11-07 Klaus Maisinger , M. P. Hobson , Richard D. E. Saunders , Keith J. B. Grainge