Results 41 to 50 of about 469,036 (195)

Power spectrum and diffusion of the Amari neural field

open access: yes, 2019
We study the power spectrum of a space-time dependent neural field which describes the average membrane potential of neurons in a single layer. This neural field is modelled by a dissipative integro-differential equation, the so-called Amari equation. By
Salasnich, Luca
core   +1 more source

Mathematical analysis of batch reactor performance for the enzymatic synthesis of cephalexin: Laplace Homotopy perturbation method and Adomian decomposition method

open access: yesPartial Differential Equations in Applied Mathematics
In this article, a mathematical model of diffusion reaction in kinetically controlled cephalexin synthesis in the batch reactor with penicillin acylase immobilized in glyoxyl-agarose is analyzed. The kinetic model is a non-linear non-stead-state reaction–
M. Mallikarjuna, R. Senthamarai
doaj   +1 more source

Solving the Caputo Fractional Reaction-Diffusion Equation on GPU

open access: yesDiscrete Dynamics in Nature and Society, 2014
We present a parallel GPU solution of the Caputo fractional reaction-diffusion equation in one spatial dimension with explicit finite difference approximation.
Jie Liu   +4 more
doaj   +1 more source

Long-time behavior of stochastic reaction–diffusion equation with multiplicative noise

open access: yesAdvances in Difference Equations, 2020
In this paper, we study the dynamical behavior of the solution for the stochastic reaction–diffusion equation with the nonlinearity satisfying the polynomial growth of arbitrary order p ≥ 2 $p\geq2$ and any space dimension N.
Jing Wang, Qiaozhen Ma, Tingting Liu
doaj   +1 more source

Simulation of stochastic reaction-diffusion processes on unstructured meshes

open access: yes, 2008
Stochastic chemical systems with diffusion are modeled with a reaction-diffusion master equation. On a macroscopic level, the governing equation is a reaction-diffusion equation for the averages of the chemical species.
Engblom, Stefan   +3 more
core   +3 more sources

Maximum Principles for Discrete and Semidiscrete Reaction-Diffusion Equation

open access: yesDiscrete Dynamics in Nature and Society, 2015
We study reaction-diffusion equations with a general reaction function f on one-dimensional lattices with continuous or discrete time ux′  (or  Δtux)=k(ux-1-2ux+ux+1)+f(ux), x∈Z.
Petr Stehlík, Jonáš Volek
doaj   +1 more source

Convolution Representation of Traveling Pulses in Reaction-Diffusion Systems

open access: yesAdvances in Mathematical Physics, 2023
Convolution representation manifests itself as an important tool in the reduction of partial differential equations. In this study, we consider the convolution representation of traveling pulses in reaction-diffusion systems.
Satoshi Kawaguchi
doaj   +1 more source

Reaction rates for a generalized reaction-diffusion master equation

open access: yes, 2015
It has been established that there is an inherent limit to the accuracy of the reaction-diffusion master equation. Specifically, there exists a fundamental lower bound on the mesh size, below which the accuracy deteriorates as the mesh is refined further.
Hellander, Stefan, Petzold, Linda
core   +1 more source

Effect of stress-dependent activation enthalpy on electrochemical reaction and diffusion-reaction-induced stress in spherical electrodes

open access: yesResults in Physics, 2019
Effect of chemical reaction on Li-ions diffusion and diffusion-reaction-induced stresses in a spherical electrode is studied, considering the reaction rate determined by the relation between hydrostatic stress and activation enthalpy, to derive new ...
Liangxinbu Lyu   +4 more
doaj   +1 more source

Stochastic simulation of catalytic surface reactions in the fast diffusion limit [PDF]

open access: yes, 2006
The master equation of a lattice gas reaction tracks the probability of visiting all spatial configurations. The large number of unique spatial configurations on a lattice renders master equation simulations infeasible for even small lattices.
Haseltine, Eric L.   +2 more
core   +1 more source

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