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This manuscript concerns the dynamics of non-isentropic compressible Euler equations in a physical vacuum. We establish the Hadamard-style local well-posedness in low-regularity weighted Sobolev spaces, where the gas-vacuum interface is…

偏微分方程分析 · 数学 2025-08-04 Sicheng Liu , Tao Luo

Many-body localization is a dynamical phenomenon characteristic of strongly interacting and disordered many-body quantum systems which fail to achieve thermal equilibrium. From a quantum information perspective, the fingerprint of this…

We consider a system of differential equations the behavior of which solutions possesses several properties characteristic of the blood pressure distribution. The system can be used for a compartmental modeling of the cardiovascular system.…

组织与器官 · 定量生物学 2007-12-27 M. U. Akhmet , G. A. Bekmukhambetova

This paper is concerned with the asymptotic stability analysis of a one dimensional wave equation subject to a nonmonotone distributed damping. A well-posedness result is provided together with a precise characterization of the asymptotic…

偏微分方程分析 · 数学 2019-02-07 Swann Marx , Yacine Chitour , Christophe Prieur

The pinning of an inhomogeneous elastic medium by a disordered substrate is studied analytically and numerically. The static and dynamic properties of a $D$-dimensional system are shown to be equivalent to those of the well known problem of…

统计力学 · 物理学 2009-10-30 D. Cule , T. Hwa

Amorphous materials have a rich relaxation spectrum, which is usually described in terms of a hierarchy of relaxation mechanisms. In this work, we investigate the local dynamic modulus spectra in a model glass just above the glass…

无序系统与神经网络 · 物理学 2019-03-27 Baoshuang Shang , Jörg Rottler , Pengfei Guan , Jean-Louis Barrat

It is well-known that nonlinearity may lead to localization effects and coupling of internally resonant modes. However, research focused primarily on conservative systems commonly assumes that the near-resonant forced response closely…

斑图形成与孤子 · 物理学 2021-01-12 Malte Krack , Lawrence A. Bergman , Alexander F. Vakakis

We consider 3D free-boundary compressible elastodynamic system under the Rayleigh-Taylor sign condition. It describes the motion of an isentropic inviscid elastic medium with moving boundary. The deformation tensor satisfies the neo-Hookean…

偏微分方程分析 · 数学 2022-07-01 Junyan Zhang

We propose a mathematical and numerical model for the simulation of the heart function that couples cardiac electrophysiology, active and passive mechanics and hemodynamics, and includes reduced models for cardiac valves and the circulatory…

Data-driven methods for the identification of the governing equations of dynamical systems or the computation of reduced surrogate models play an increasingly important role in many application areas such as physics, chemistry, biology, and…

动力系统 · 数学 2024-12-17 Stefan Klus , Hongyu Zhu

We consider a stochastic many-body system where a source refills uniformly the empty sites of a hypercubic lattice, on which each particle is allowed to jump (symmetrically) onto neighboring vacant sites. In addition, there is a local {\it…

统计力学 · 物理学 2007-05-23 Mauro Mobilia

When describing elastic deformations of a body sometimes it is worth to take in account elastic spatial dispersion. If spatial dispersion is weak, as usually happens, then it can be reduced to dependence of thermodynamic potential on strain…

材料科学 · 物理学 2015-04-23 A. S. Yurkov

Atmospheric systems incorporating thermal dynamics must be stable with respect to both energy and entropy. While energy conservation can be enforced via the preservation of the skew-symmetric structure of the Hamiltonian form of the…

数值分析 · 数学 2023-10-31 Kieran Ricardo , David Lee , Kenneth Duru

We develop a parabolic inf-sup theory for a modified TraceFEM semi-discretization in space of the heat equation posed on a stationary surface embedded in $\mathbb{R}^n$. We consider the normal derivative volume stabilization and add an…

数值分析 · 数学 2024-09-24 Lucas Bouck , Ricardo H. Nochetto , Mansur Shakipov , Vladimir Yushutin

We prove the incompressible limit of non-isentropic inviscid elastodynamic equations with general initial data in 3D half-space. The deformation tensor is assumed to satisfy the neo-Hookean linear elasticity and degenerates in the normal…

偏微分方程分析 · 数学 2024-12-16 Jiawei Wang , Junyan Zhang

We construct a general metric-tensor framework for treating inhomogenous adiabatic deformations applied to crystalline insulators, by deriving an effective time-dependent Schr\"odinger equation in the undistorted frame. The response can be…

材料科学 · 物理学 2018-09-26 Massimiliano Stengel , David Vanderbilt

We exploit a two-dimensional model [7], [6] and [1] describing the elastic behavior of the wall of a flexible blood vessel which takes interaction with surrounding muscle tissue and the 3D fluid flow into account. We study time periodic…

偏微分方程分析 · 数学 2021-07-28 V. Kozlov , S. Nazarov , G. Zavorokhin

The study of pathological cardiac conditions such as arrhythmias, a major cause of mortality in heart failure, is becoming increasingly informed by computational simulation, numerically modelling the governing equations. This can provide…

计算工程、金融与科学 · 计算机科学 2014-06-09 Nathan Kirk , Alan Benson , Christopher Goodyer , Matthew Hubbard

Geometric continuum models for fluid lipid membranes are considered using classical field theory, within a covariant variational approach. The approach is cast as a higher-derivative Lagrangian formulation of continuum classical field…

数学物理 · 物理学 2017-09-14 Riccardo Capovilla

The existence of a generalized fluctuation-dissipation theorem observed in simulations and experiments performed in various glassy materials is related to the concepts of local equilibration and heterogeneity in space. Assuming the…

统计力学 · 物理学 2009-11-10 Ludovic Berthier