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Differential equations need boundary conditions (BC's) for their solution. It is commonly acknowledged that differential equations and BC's are representative of independent physical processes, and no correlations between them is required.…

数学物理 · 物理学 2025-08-01 F. Sattin , D. F. Escande

High-speed vehicles experience a highly challenging environment in which the free-stream Mach number and surface temperature greatly influence aerodynamic drag and heat transfer. The interplay of these two parameters strongly affects the…

流体动力学 · 物理学 2024-02-29 Michele Cogo , Umberto Baù , Mauro Chinappi , Matteo Bernardini , Francesco Picano

We consider the space-time scaling limit of the particle mass in zero-range particle systems on a $1$D discrete torus $\mathbb{Z}/N\mathbb{Z}$ with a finite number of defects. We focus on two classes of increasing jump rates $g$, when…

概率论 · 数学 2022-05-23 Sunder Sethuraman , Jianfei Xue

We present data of transport measurements through a metallic nanobridge exhibiting diffusive electron transport. A logarithmic temperature dependence and a zero-bias anomaly in the differential conductance are observed, independent of…

介观与纳米尺度物理 · 物理学 2020-04-20 H. B. Weber , R. Häussler , H. v. Löhneysen , J. Kroha

We consider a family of directed exponential random graph models parametrized by edges and outward stars. Much of the important statistical content of such models is given by the normalization constant of the models, and in particular, an…

概率论 · 数学 2018-03-28 David Aristoff , Lingjiong Zhu

The Cahn--Hilliard equation is a fundamental model that describes phase separation processes of binary mixtures. In recent years, several types of dynamic boundary conditions have been proposed in order to account for possible short-range…

偏微分方程分析 · 数学 2023-07-28 Chun Liu , Hao Wu

The effect of a diffusivity edge is studied in a system of scalar active matter confined by a periodic potential and driven by an externally applied force. We find that this system shows qualitatively distinct stationary regimes depending…

统计力学 · 物理学 2024-02-27 Jonas Berx , Aritra Bose , Ramin Golestanian , Benoît Mahault

In this work, we analyse the metastability of non-reversible diffusion processes $$dX_t=\boldsymbol{b}(X_t)dt+\sqrt h\,dB_t$$ on a bounded domain $\Omega$ when $\mathbf{b}$ admits the decomposition $\mathbf{b}=-(\nabla f+\mathbf{\ell})$ and…

概率论 · 数学 2023-03-14 Dorian Le Peutrec , Laurent Michel , Boris Nectoux

The excess work required to drive a stochastic system out of thermodynamic equilibrium through a time-dependent external perturbation is directly related to the amount of entropy produced during the driving process, allowing excess work and…

统计力学 · 物理学 2021-03-15 Steven J Large , Jannik Ehrich , David A Sivak

We study via Monte Carlo simulation the dynamics of the Nagel-Schreckenberg model on a finite system of length L with open boundary conditions and parallel updates. We find numerically that in both the high and low density regimes the…

统计力学 · 物理学 2015-05-14 Jan de Gier , Timothy M. Garoni , Zongzheng Zhou

We study optimal behavior of energy producers under a CO_2 emission abatement program. We focus on a two-player discrete-time model where each producer is sequentially optimizing her emission and production schedules. The game-theoretic…

最优化与控制 · 数学 2010-08-24 Michael Ludkovski

We investigate the connection between two classical models of phase transition phenomena, the (discrete size) stochastic Becker-D\"oring, a continous time Markov chain model, and the (continuous size) deterministic Lifshitz-Slyozov model, a…

概率论 · 数学 2015-06-17 Julien Deschamps , Erwan Hingant , Romain Yvinec

The scrape-off layer power width (\lambda_q) is an important parameter for characterizing the divertor heat loads. Many experimental, theoretical, and numerical studies have been performed in recent years. In this paper, a 2D electrostatic…

等离子体物理 · 物理学 2022-05-26 X. Liu , A. H. Nielsen , J. J. Rasmussen , V. Naulin , L. Wang , R. Ding , J. Li

We investigate the totally asymmetric simple exclusion process (TASEP) in the presence of a bottleneck, i.e. a sequence of consecutive defect sites with reduced hopping rate. The influence of such a bottleneck on the phase diagram is…

元胞自动机与格子气 · 物理学 2009-11-13 Philip Greulich , Andreas Schadschneider

The cellular automaton model for traffic flow exhibits a jamming transition from a free-flow phase to a congested phase. In the deterministic case this transition corresponds to a critical point with diverging correlation length. We present…

统计力学 · 物理学 2007-05-23 L. Santen , A. Schadschneider

A considerable fraction of the energy in a solar flare is released as suprathermal electrons; such electrons play a major role in energy deposition in the ambient atmosphere and hence the atmospheric response to flare heating. Historically…

太阳与恒星天体物理 · 物理学 2018-08-08 A. G. Emslie , N. H. Bian , E. P. Kontar

Boundary-induced phase transitions are one of the surprising phenomena appearing in nonequilibrium systems. These transitions have been found in driven systems, especially the asymmetric simple exclusion process. However, so far no direct…

统计力学 · 物理学 2007-05-23 V. Popkov , L. Santen , A. Schadschneider , G. M. Schutz

Energy landscape mappings are performed for two different molecular systems under mechanical loads. Barrier heights are observed to scale as $\Delta U\sim\delta^{3/2}$, where $\delta$ is a residual load. Catastrophe theory predicts that…

材料科学 · 物理学 2009-11-11 Craig E. Maloney , Daniel J. Lacks

In contrast with existing works which rely on the same type of energy-efficiency measure to design distributed power control policies, the present work takes into account the presence of a finite packet buffer at the transmitter side and…

网络与互联网体系结构 · 计算机科学 2016-11-17 Vineeth S. Varma , Samson Lasaulce , Yezekael Hayel , Salah Eddine Elayoubi

We consider a free boundary problem for the heat equation with a given non-negative external heat source. On the free boundary, we impose the zero Dirichlet condition and the fixed normal derivative so that heat escapes from the boundary.…

偏微分方程分析 · 数学 2025-05-05 Ken Furukawa , Yoshikazu Giga , Naoto Kajiwara