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We study a class of optimization problems in the Wasserstein space (the space of probability measures) where the objective function is nonconvex along generalized geodesics. Specifically, the objective exhibits some difference-of-convex…

We numerically investigate the distribution of Drude weights $D$ of many-body states in disordered one-dimensional interacting electron systems across the transition to a many-body localized phase. Drude weights are proportional to the…

介观与纳米尺度物理 · 物理学 2016-11-23 Michele Filippone , Piet W. Brouwer , Jens Eisert , Felix von Oppen

The spectral decomposition of the elastic wave operator in a layered isotropic half-space is derived by means of standard functional analytic methods. Particular attention is paid to the coupled $P$-$SV$ waves. The problem is formulated…

地球物理 · 物理学 2010-11-17 Ludovic Margerin

We study a population of $N$ particles, which evolve according to a diffusion process and interact through a dynamical network. In turn, the evolution of the network is coupled to the particles' positions. In contrast with the mean-field…

数学物理 · 物理学 2020-10-14 Julien Barré , Paul Dobson , Michela Ottobre , Ewelina Zatorska

In this paper we analyse a class of nonlinear cross-diffusion systems for two species with local repulsive interactions that exhibit a formal gradient flow structure with respect to the Wasserstein metric. We show that systems where the…

偏微分方程分析 · 数学 2019-06-11 M. Burger , J. A. Carrillo , J. -F. Pietschmann , M. Schmidtchen

We consider interacting particle dynamics with Vicsek type interactions, and their macroscopic PDE limit, in the non-mean-field regime; that is, we consider the case in which each particle/agent in the system interacts only with a…

斑图形成与孤子 · 物理学 2022-06-15 P. Buttà , B. Goddard , T. M. Hodgson , M. Ottobre , K. J. Painter

We study a nonlinear recombination model from population genetics as a combinatorial version of the Kac-Boltzmann equation from kinetic theory. Following Kac's approach, the nonlinear model is approximated by a mean field linear evolution…

概率论 · 数学 2024-12-24 Pietro Caputo , Daniel Parisi

The theory of Wasserstein gradient flows in the space of probability measures has made an enormous progress over the last twenty years. It constitutes a unified and powerful framework in the study of dissipative partial differential…

偏微分方程分析 · 数学 2022-01-17 Daniel Adams , Manh Hong Duong , Goncalo dos Reis

We study the asymptotic properties of the steady state mass distribution for a class of collision kernels in an aggregation-shattering model in the limit of small shattering probabilities. It is shown that the exponents characterizing the…

统计力学 · 物理学 2018-02-22 Colm Connaughton , Arghya Dutta , R. Rajesh , Nana Siddharth , Oleg Zaboronski

This article presents stability and convergence analyses of subgrid multiscale stabilized finite element formulation of non-Newtonian power-law fluid flow model strongly coupled with variable coefficients Advection-Diffusion-Reaction…

数值分析 · 数学 2021-02-19 Manisha Chowdhury , B. V. Rathish Kumar

Interactions between an internal flow and wall deformation occur in many biological systems. Such interactions can involve a complex and rich dynamical behavior and a number of peculiarities which depend on the flow parameter range. The aim…

流体动力学 · 物理学 2019-03-11 Mustapha Amaouche , Giuseppe Di Labbio

This paper advances an analytical incremental contact model for the purely elastic or elastic-perfectly plastic Gaussian rough surfaces. The contact is modelled by the accumulation of identical circular contacts with radius given by the…

材料科学 · 物理学 2022-04-06 Sihe Wang , Weike Yuan , Xuanming Liang , Gangfeng Wang

The common standard for quality evaluation of automatic speech recognition (ASR) systems is reference-based metrics such as the Word Error Rate (WER), computed using manual ground-truth transcriptions that are time-consuming and expensive…

计算与语言 · 计算机科学 2023-06-26 Kamer Ali Yuksel , Thiago Ferreira , Ahmet Gunduz , Mohamed Al-Badrashiny , Golara Javadi

We investigate the level density for several ensembles of positive random matrices of a Wishart--like structure, $W=XX^{\dagger}$, where $X$ stands for a nonhermitian random matrix. In particular, making use of the Cauchy transform, we…

数学物理 · 物理学 2015-07-16 Wojciech Mlotkowski , Maciej A. Nowak , Karol A. Penson , Karol Zyczkowski

We study local and nonlocal correlations of light transmitted through active random media. The conventional approach results in divergence of ensemble averaged correlation functions due to existence of lasing realizations. We introduce…

无序系统与神经网络 · 物理学 2007-05-23 Alexey Yamilov , Shih-Hui Chang , Aleksander Burin , Allen Taflove , Hui Cao

Merging models becomes a fundamental procedure in some applications that consider model efficiency and robustness. The training randomness or Non-I.I.D. data poses a huge challenge for averaging-based model fusion. Previous research efforts…

人工智能 · 计算机科学 2024-08-23 Yichu Xu , Xin-Chun Li , Le Gan , De-Chuan Zhan

We study the dissipation of diffuse ultrasonic energy in a reverberant body coupled to a waveguide, an analog for a mesoscopic electron in a quantum dot. A simple model predicts a Porter-Thomas like distribution of level widths and…

介观与纳米尺度物理 · 物理学 2009-11-10 Oleg I. Lobkis , Igor S. Rozhkov , Richard L. Weaver

We apply the density-matrix renormalization group (DMRG) method to a one-dimensional Hubbard model that lacks Umklapp scattering and thus provides an ideal case to study the Mott-Hubbard transition analytically and numerically. The model…

强关联电子 · 物理学 2021-12-22 Florian Gebhard , Örs Legeza

The concerns to autonomous vehicles have been becoming more intriguing in coping with the more environmentally dynamics non-linear systems under some constraints and disturbances. These vehicles connect not only to the self-instruments yet…

系统与控制 · 电气工程与系统科学 2023-04-12 Bambang L. Widjiantoro , Moh Kamalul Wafi , Katherin Indriawati

We present a novel approximate inference method for diffusion processes, based on the Wasserstein gradient flow formulation of the diffusion. In this formulation, the time-dependent density of the diffusion is derived as the limit of…

机器学习 · 统计学 2018-06-13 Charlie Frogner , Tomaso Poggio
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