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This work proposes a model for granular deformation that predicts the stress and velocity profiles in well-developed dense granular flows. Recent models for granular elasticity (Jiang and Liu 2003) and rate-sensitive plastic flow (Jop et…

软凝聚态物质 · 物理学 2009-09-30 Ken Kamrin

We study a non-local hydrodynamic system with control. First we characterize the control dynamics as a sub-optimal approximation to the optimal control problem constrained to the evolution of the pressureless Euler alignment system. We then…

偏微分方程分析 · 数学 2018-02-01 Giacomo Albi , Young-Pil Choi , Axel-Stefan Haeck

The paper provides conditions that guarantee existence and uniqueness of classical solutions for a non-local conservation law on a ring-road with possible nudging (or "look behind") terms. The obtained conditions are novel, as they are not…

最优化与控制 · 数学 2020-03-06 Iasson Karafyllis , Dionysis Theodosis , Markos Papageorgiou

We present a new finite volume method for computing numerical approximations of a system of nonlocal transport equation modeling interacting species. This method is based on the work [F. Delarue, F. Lagoutire, N. Vauchelet, Convergence…

偏微分方程分析 · 数学 2019-12-16 Anissa Keurti , Thomas Rey

Thermodynamic models present binary interaction parameters, based on the Boltzmann weight. Discrepancies from experimental data lead to empirically consider temperature dependence of the parameters, but these modifications keep unchanged…

化学物理 · 物理学 2012-06-05 Ernesto P. Borges

A key challenge to nonlocal models is the analytical complexity of deriving them from first principles, and frequently their use is justified a posteriori. In this work we extract nonlocal models from data, circumventing these challenges…

最优化与控制 · 数学 2020-12-30 Huaiqian You , Yue Yu , Nathaniel Trask , Mamikon Gulian , Marta D'Elia

A description of the dynamics of a collisionless, self-gravitating fluid is developed and applied to follow the development of Large Scale Structures in the Universe. Such description takes on one of the assumptions of the Adhesion…

天体物理学 · 物理学 2009-11-07 N. Menci

We deal with the problem of approximating a scalar conservation law by a conservation law with nonlocal flux. As convolution kernel in the nonlocal flux, we consider an exponential-type approximation of the Dirac distribution. This enables…

偏微分方程分析 · 数学 2020-12-25 Giuseppe Maria Coclite , Jean-Michel Coron , Nicola De Nitti , Alexander Keimer , Lukas Pflug

We study the large-time behavior of Eulerian systems augmented with non-local alignment. Such systems arise as hydrodynamic descriptions of agent-based models for self-organized dynamics, e.g., Cucker-Smale and Motsch-Tadmor models…

偏微分方程分析 · 数学 2015-06-19 Eitan Tadmor , Changhui Tan

The nonlocal porous medium equation considered in this paper is a degenerate nonlinear evolution equation involving a space pseudo-differential operator of fractional order. This space-fractional equation admits an explicit, nonnegative,…

概率论 · 数学 2019-02-05 Alessandro De Gregorio

We obtain new transport-entropy inequalities and, as a by-product, new deviation estimates for the laws of two kinds of discrete stochastic approximation schemes. The first one refers to the law of an Euler like discretization scheme of a…

概率论 · 数学 2013-02-01 Max Fathi , Noufel Frikha

We train a neural network as the universal exchange-correlation functional of density-functional theory that simultaneously reproduces both the exact exchange-correlation energy and potential. This functional is extremely non-local, but…

计算物理 · 物理学 2019-10-10 Jonathan Schmidt , Carlos L. Benavides-Riveros , Miguel A. L. Marques

Localisation limits and nonlocal approximations of degenerate parabolic systems have experienced a renaissance in recent years. However, only few results cover anisotropic systems. This work addresses this gap by establishing the…

偏微分方程分析 · 数学 2024-12-31 Tomasz Dębiec , Markus Schmidtchen

Nonlocal cross-diffusion systems on the torus, arising in population dynamics and neuroscience, are analyzed. The global existence of weak solutions, the weak-strong uniqueness, and the localization limit are proved. The kernels are assumed…

偏微分方程分析 · 数学 2021-09-28 Ansgar Jüngel , Stefan Portisch , Antoine Zurek

We implement the Wang-Landau algorithm to sample with equal probabilities the static configurations of a model granular system. The "non-interacting rigid arch model" used is based on the description of static configurations by means of…

软凝聚态物质 · 物理学 2016-08-31 D. Slobinsky , Luis A. Pugnaloni

A class of parabolic cross-diffusion systems modeling the interaction of an arbitrary number of population species is analyzed in a bounded domain with no-flux boundary conditions. The equations are formally derived from a random-walk…

偏微分方程分析 · 数学 2015-02-20 Nicola Zamponi , Ansgar Jüngel

Based on the formalism of nonlocal extension of the Israel-Stewart causal thermodynamics on the one hand, and on the formalism of the extended thermostatics on the other hand, we propose the new model of nonlocal relativistic…

广义相对论与量子宇宙学 · 物理学 2023-04-17 Alexei S. Ilin , Alexander B. Balakin

Systems describing the long-range interaction between individuals have attracted a lot of attention in the last years, in particular in relation with living systems. These systems are quadratic, written under the form of transport equations…

偏微分方程分析 · 数学 2023-06-13 Marie Doumic , Sophie Hecht , Benoit Perthame , Diane Peurichard

We study a nonlocal particle model describing traffic flow on rough roads. In the model, each driver adjusts the speed of the car according to the condition over an interval in the front, leading to a system of nonlocal ODEs which we refer…

偏微分方程分析 · 数学 2019-11-12 Jereme Chien , Wen Shen

We study the phenomena of Anderson localization in the presence of nonlinear interaction on a lattice. A class of nonlinear Schrodinger models with arbitrary power nonlinearity is analyzed. We conceive the various regimes of behavior,…

混沌动力学 · 物理学 2015-06-19 Alexander V. Milovanov , Alexander Iomin