搜索结果: 1-15 共查到“数学 medium”相关记录22条 . 查询时间(0.113 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The core-shell obstacle scattering in a multilayered medium
多层介质 核壳障碍物 散射 边界积分方程
2023/4/26
Scattering from the coated targets embedded in a multilayered medium has attracted much interest during recent years for extensive applications, such as sea radar target detection and underwater radar...
Time splitting for the Liouville equation in a random medium
Time splitting Liouville equation random medium
2015/7/14
We consider the Liouville equations with highly heterogeneous Hamiltonians and their numerical solution by a time splitting algorithm. Such equations model the density of particles evolving according ...
Traveling waves in a one-dimensional heterogeneous medium
Traveling waves one-dimensional heterogeneous medium
2015/7/14
We consider solutions of a scalar reaction-diffusion equation of the ignition type with a random, stationary and ergodic reaction rate. We show that solutions of the Cauchy problem spread with a deter...
This paper reviews several mathematical techniques that have been developed to analyze the asymptotic behavior of waves and particles propagating in a heterogeneous medium. The heterogeneous medium is...
The logarithmic delay of KPP fronts in a periodic medium
logarithmic delay KPP fronts periodic medium
2015/7/14
We consider solutions of the KPP-type equations with a periodically varying reaction rate, and compactly supported initial data. It has been shown by Bramson [5, 6] in the case of the constant reactio...
Gradient estimates for porous medium and fast diffusion equations via FBSDE approach
Gradient estimates porous medium fast diffusion equations FBSDE approach Probability
2012/6/27
In this paper, we establish several gradient estimates for the positive solution of Porous Medium Equations (PMEs) and Fast Diffusion Equations (FDEs). Our proof is probabilistic and uses martingale t...
Localization Transition for Polymers in Poissonian Medium
Directed polymers random environment Probability
2012/6/25
We study a model of directed polymers in random environment in dimension $1+d$, given by a Brownian motion in a Poissonian potential. We study the effect of the density and the strength of inhomogenei...
Interface dynamics of the porous medium equation with a bistable reaction term
degenerate diffusion singular perturbation sharp interface limit population dynamics
2011/9/14
Abstract: We consider a degenerate partial differential equation arising in population dynamics, namely the porous medium equation with a bistable reaction term. We study its asymptotic behavior as a ...
An Exponential Series Method for the Solution of Free Convection Boundary Layer Flow in a Saturated Porous Medium
Boundary Layer Equations Stretching Surface Dirichlet Series Powell’s Method Stretching of Variables.
2013/1/30
Third order nonlinear ordinary differential equation, subject to appropriate boundary conditions, arising in fluid mechanics is solved exactly using more suggestive schemes- Dirichlet series and metho...
Coding for High-Density Recording on a 1-D Granular Magnetic Medium
High-Density Recording 1-D Granular Magnetic Medium
2011/1/19
In terabit-density magnetic recording, several bits of data can be replaced by the values of their neighbors in the storage medium. As a result, errors in the medium are dependent on each other and al...
Dynamical quorum-sensing and synchronization of nonlinear oscillators coupled through an external medium
Dynamical quorum-sensing synchronization of nonlinear oscillators external medium
2010/12/28
Many biological and physical systems exhibit population-density dependent transitions to syn-
chronized oscillations in a process often termed \dynamical quorum sensing". Synchronization
frequently ...
Three-dimensional Couette flow in a composite channel partially filled with a porous medium
Couette flow composite channel Brinkman porous medium
2010/11/1
The couette flow of a viscous fluid in a channel, partially filled with a porous medium has been analyzed. The lower part of the channel is occupied by a porous medium, while the upper part is occupie...
Radiation effects on natural convection MHD flow in a rotating vertical porous channel partially filled with a porous medium
Natural convection radiation permeability
2010/9/21
The unsteady natural convection MHD flow of a rotating viscous electrically conducting fluid in a vertical channel partially filled by a porous medium with high porosity in the presence of radiation e...
Axi-symmetric deformation due to expanding surface loads in a fluid saturated porous medium
Ring load disc load pore pressure
2010/9/25
The general solution to the field equations of fluid saturated incompressible porous medium for two dimensional axi-symmetric problem is obtained due to time harmonic ring and disc loads by applying H...
Propagation of SH waves in an irregular non homogeneous monoclinic crustal layer over a semi-infinite monoclinic medium
SH waves Monoclinic Irregular boundaries
2010/9/26
The present paper discuss the dispersion equation for SH waves in a non homogeneous monoclinic layer over a semi infinite isotropic monoclinic medium with an irregularity. The dispersion equation has ...