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Heat-flux boundary conditions are challenging to implement efficiently in rarefied gas flow simulations because the wall-reflected gas temperature and density must be determined dynamically during the computation. This paper aims to tackle…

计算物理 · 物理学 2026-01-21 Yanbing Zhang , Ruifeng Yuan , Liyan Luo , Lei Wu

In this paper, we are interested to an inverse Cauchy problem governed by the Stokes equation, called the data completion problem. It consists in determining the unspecified fluid velocity, or one of its components over a part of its…

数值分析 · 数学 2021-12-30 A. Chakib , A. Nachaoui , M. Nachaoui , H. Ouaissa

This work proposes a fast iterative method for local steric Poisson--Boltzmann (PB) theories, in which the electrostatic potential is governed by the Poisson's equation and ionic concentrations satisfy equilibrium conditions. To present the…

数值分析 · 数学 2023-04-05 Minhong Chen , Wei Dou , Shenggao Zhou

Nonlinear integrable models with two spatial and one temporal variables: Kadomtsev-Petviashvili equation and two-dimensional Toda lattice are investigated on the subject of correct formulation for boundary problem that can be solved within…

数学物理 · 物理学 2010-12-17 Vadim Vereschagin

Based upon elements of the modern Pseudoanalytic Function Theory, we analyse a new method for numerically approaching the solution of the Dirichlet boundary value problem, corresponding to the two-dimensional Electrical Impedance Equation.…

数学物理 · 物理学 2012-02-23 M. P. Ramirez T. , C. M. A. Robles G. , R. A. Hernandez-Becerril

In order to solve an initial value problem by the variational iteration method, a sequence of functions is produced which converges to the solution under some suitable conditions. In the nonlinear case, after a few iterations the terms of…

数值分析 · 数学 2016-06-23 Davod Khojasteh Salkuyeh , Ali Tavakoli

We discuss alternative iteration methods for differential equations. We provide a convergence proof for exactly solvable examples and show more convenient formulas for nontrivial problems.

数学物理 · 物理学 2007-05-23 Paolo Amore , Hakan Ciftci , Francisco M. Fernandez

In this paper, an efficient iterative method is proposed for solving multiple scattering problem in locally inhomogeneous media. The key idea is to enclose the inhomogeneity of the media by well separated artificial boundaries and then…

数值分析 · 数学 2019-10-23 Ziqing Xie , Rui Zhang , Bo Wang , Li-lian Wang

This paper introduces a fast and numerically stable algorithm for the solution of fourth-order linear boundary value problems on an interval. This type of equation arises in a variety of settings in physics and signal processing. Our method…

数值分析 · 计算机科学 2020-01-13 William Leeb , Vladimir Rokhlin

We consider the inverse problem for countable, locally finite electrical networks with edge weights in an arbitrary field. The electrical inverse problem seeks to determine the weights of the edges knowing only the potential and current…

组合数学 · 数学 2016-05-31 David Jekel

We consider the inverse problem of reconstructing the interior boundary curve of a doubly connected domain from the knowledge of the temperature and the thermal flux on the exterior boundary curve. The use of the Laguerre transform in time…

数值分析 · 数学 2024-02-23 Roman Chapko , Leonidas Mindrinos

We extend the recent improvement of Roth's theorem on three term arithmetic progressions by Sanders to obtain similar results for the problem of locating non-trivial solutions to translation invariant linear equations in many variables in…

数论 · 数学 2012-11-26 Thomas Bloom

A full multigrid finite element method is proposed for semilinear elliptic equations. The main idea is to transform the solution of the semilinear problem into a series of solutions of the corresponding linear boundary value problems on the…

数值分析 · 数学 2017-03-29 Hehu Xie , Fei Xu

The electrical impedance tomography (EIT) problem of estimating the unknown conductivity distribution inside a domain from boundary current or voltage measurements requires the solution of a nonlinear inverse problem. Sparsity promoting…

数值分析 · 数学 2024-05-27 Daniela Calvetti , Monica Pragliola , Erkki Somersalo

A numerical method for the Dirichlet initial boundary value problem for the elastic equation in the exterior and unbounded region of a smooth closed simply connected 2-dimensional domain, is proposed and investigated. This method is based…

数值分析 · 数学 2024-02-23 Roman Chapko , Leonidas Mindrinos

We present a Riemann-Hilbert problem formalism for the initial-boundary value problem for the Sasa-Satsuma(SS) equation on the finite interval. Assume that the solution existes, we show that this solution can be expressed in terms of the…

可精确求解与可积系统 · 物理学 2015-12-22 Jian Xu , Qiaozhen Zhu , Engui Fan

The linear stability analysis of the Boltzmann kinetic equation has recently garnered research interest due to its potential applications in space exploration, where rarefaction effects can render the Navier Stokes equations invalid. Since…

计算物理 · 物理学 2025-08-05 Lei Wu

We develop a novel, fundamental and surprisingly simple randomized iterative method for solving consistent linear systems. Our method has six different but equivalent interpretations: sketch-and-project, constrain-and-approximate, random…

数值分析 · 数学 2016-01-07 Robert M. Gower , Peter Richtárik

Lie symmetry method is applied to find analytic solutions of initial-boundary-value problems of transient conduction in semi-infinite solid with constant surface temperature or constant heat flux condition. The solutions are obtained in a…

偏微分方程分析 · 数学 2009-09-07 H. Azad , M. T. Mustafa , A. F. M. Arif

We proposed in this paper a new method, which we named the W4 method, to solve nonlinear equation systems. It may be regarded as an extension of the Newton-Raphson~(NR) method to be used when the method fails. Indeed our method can be…