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Gaussian Graphical Models (GGMs) or Gauss Markov random fields are widely used in many applications, and the trade-off between the modeling capacity and the efficiency of learning and inference has been an important research problem. In…

机器学习 · 计算机科学 2013-11-12 Ying Liu , Alan S. Willsky

Federated Learning (FL) refers to the paradigm where multiple worker nodes (WNs) build a joint model by using local data. Despite extensive research, for a generic non-convex FL problem, it is not clear, how to choose the WNs' and the…

机器学习 · 计算机科学 2021-06-22 Prashant Khanduri , Pranay Sharma , Haibo Yang , Mingyi Hong , Jia Liu , Ketan Rajawat , Pramod K. Varshney

We survey recent developments in fractal analysis of regular and slow-fast dynamical systems using Minkowski dimension. Our focus is on spiral trajectories near monodromic limit periodic sets in regular systems and entry-exit sequences in…

动力系统 · 数学 2025-08-28 Renato Huzak , Goran Radunović , Vesna Županović

Gravitational waves (GWs) from binary neutron stars (BNSs) offer valuable understanding of the nature of compact objects and hadronic matter, and the science potential will be greatly enhanced by the third-generation (3G) GW detectors,…

广义相对论与量子宇宙学 · 物理学 2025-07-02 Qian Hu , Jessica Irwin , Qi Sun , Christopher Messenger , Lami Suleiman , Ik Siong Heng , John Veitch

Gaussian Boson sampling (GBS) provides a highly efficient approach to make use of squeezed states from parametric down-conversion to solve a classically hard-to-solve sampling problem. The GBS protocol not only significantly enhances the…

We present an implementation of the $GW$ space-time approach that allows cubic-scaling all-electron calculations with standard Gaussian basis sets without exploiting any localization nor sparsity considerations. The independent-electron…

计算物理 · 物理学 2021-04-29 Ivan Duchemin , Xavier Blase

The collection of individually resolvable gravitational wave (GW) events makes up a tiny fraction of all GW signals which reach our detectors, while most lie below the confusion limit and go undetected. Like voices in a crowded room, the…

广义相对论与量子宇宙学 · 物理学 2022-03-02 Arianna I. Renzini , Boris Goncharov , Alexander C. Jenkins , Pat M. Meyers

In this paper we study stochastic quasi-Newton methods for nonconvex stochastic optimization, where we assume that noisy information about the gradients of the objective function is available via a stochastic first-order oracle (SFO). We…

最优化与控制 · 数学 2017-05-23 Xiao Wang , Shiqian Ma , Donald Goldfarb , Wei Liu

Continuous gravitational waves represent one of the long-sought types of signals that have yet to be detected. Due to their small amplitude, long observational datasets (months-years) have to be analyzed together, thereby vastly increasing…

广义相对论与量子宇宙学 · 物理学 2022-06-22 P. B. Covas , R. Prix

We show that the recently-introduced formalism by Neuhauser et al. for the calculation of the quasi-particle energies of electronic systems within the framework of the GW approximation of the self-energy operator, named the `stochastic GW…

介观与纳米尺度物理 · 物理学 2014-03-05 Behnam Farid

Complex systems (CS) are ubiquitous in nature. It is argued that fractional order (FO) calculus is more suitable to describe fractal systems. Motivated by the fractal space time theory some fractional generalizations of Scrodinger and…

适应与自组织系统 · 物理学 2009-01-26 Awatif M. Shahin , Elsayed Ahmed , Ahmed S. Elgazzar , Yassmin A. Omar

Gravitational wave (GW) astrophysics is entering a multi-band era with upcoming GW detectors, enabling detailed mapping of the stochastic GW background across vast frequencies. We highlight this potential via a new physics scenario: hybrid…

广义相对论与量子宇宙学 · 物理学 2025-11-26 Yunjia Bao , Tore Boybeyi , Vuk Mandic , Lian-Tao Wang

The GW approximation is widely used for reliable and accurate modeling of single-particle excitations. It also serves as a starting point for many theoretical methods, such as its use in the Bethe-Salpeter equation (BSE) and dynamical…

计算物理 · 物理学 2024-03-25 Weiwei Gao , Zhao Tang , Jijun Zhao , James R. Chelikowsky

Sparse variational approximations are popular methods for scaling up inference and learning in Gaussian processes to larger datasets. For $N$ training points, exact inference has $O(N^3)$ cost; with $M \ll N$ features, state of the art…

机器学习 · 统计学 2024-04-15 Talay M Cheema , Carl Edward Rasmussen

Scalar Induced Gravitational Waves (SIGW) are generated at second order in perturbation theory and to achieve observational relevance, inflationary dynamics must evade the standard slow-roll scenario at small scales, generating large…

宇宙学与河外天体物理 · 物理学 2026-05-27 Giovanni Piccoli

This paper presents a new, non-Gaussian formulation of stochastic gravity by incorporating the higher moments of the fluctuations of the quantum stress energy tensor for a free quantum scalar field in a consistent way. A scheme is developed…

广义相对论与量子宇宙学 · 物理学 2013-05-17 Jason D. Bates

We present a spectrally accurate method for the rapid evaluation of free-space Stokes potentials, i.e. sums involving a large number of free space Green's functions. We consider sums involving stokeslets, stresslets and rotlets that appear…

Stochastic gravitational wave background (SGWB) is a promising tool to probe the very early universe where the standard model of particle physics and cosmology are connected closely. As a possible component of SGWB, gravitational waves (GW)…

广义相对论与量子宇宙学 · 物理学 2022-03-02 Haowen Zhong , Biping Gong , Taotao Qiu

This work presents new Gaussian single- and double-zeta basis sets optimized for stochastic density functional theory (sDFT) using real-space auxiliary grids. Previous studies showed standard basis sets like STO-3G and 6-31G are sub-optimal…

化学物理 · 物理学 2025-04-25 Marcel David Fabian , Eran Rabani , Roi Baer

This paper seeks an efficient algorithm for stochastic precoding to maximize the long-term average weighted sum rates throughout a multiple-input multiple-output (MIMO) network. Unlike many existing works that assume a particular…

信息论 · 计算机科学 2026-03-10 Wenyu Wang , Kaiming Shen