Results 31 to 40 of about 1,252,466 (233)

Adjusted intensity nonlocal diffusion model of photopolymer grating formation [PDF]

open access: yes, 2002
Diffusion-based models of grating formation in photopolymers have been proposed in which the rate of monomer polymerization (removal) is directly proportional to the illuminating intensity inside the medium. However, based on photochemical considerations,
Lawrence, Justin R.   +3 more
core   +1 more source

Electro-reaction-diffusion systems with nonlocal constraints [PDF]

open access: yes, 2003
The paper deals with equations modelling the redistribution of charged particles by reactions, drift and diffusion processes. The corresponding model equations contain parabolic PDEs for the densities of mobile species, ODEs for the densities of immobile
Glitzky, Annegret
core   +1 more source

Effective nonlocal kernels on reaction–diffusion networks

open access: yesJournal of Theoretical Biology, 2021
A new method to derive an essential integral kernel from any given reaction-diffusion network is proposed. Any network describing metabolites or signals with arbitrary many factors can be reduced to a single or a simpler system of integro-differential equations called "effective equation" including the reduced integral kernel (called "effective kernel"
Shin-Ichiro Ei   +4 more
openaire   +4 more sources

Modeling change in public sentiment with nonlocal reaction-diffusion equations [PDF]

open access: yes, 2022
This is a brief "proof of concept" article that shows nonlocal diffusion is well suited to the study of pattern formation and the particular application of public sentiment.
Shomberg, Joseph L.
core  

Nonlinear nonlocal reaction-diffusion problem with local reaction [PDF]

open access: yes, 2022
In this paper we analyse the asymptotic behaviour of some nonlocal diffusion problems with local reaction term in general metric measure spaces.
Rodríguez Bernal, Aníbal   +5 more
core   +1 more source

Numerical modeling of population 2D-dynamics with nonlocal interaction [PDF]

open access: yesКомпьютерные исследования и моделирование, 2010
Numerical solutions for the two-dimensional reaction-diffusion equation with nonlocal nonlinearity are obtained. The solutions reveal formation of dissipative structures.
Aleksei Vladimirovich Borisov   +2 more
doaj   +1 more source

Identification of the Diffusion Parameter in Nonlocal Steady Diffusion Problems [PDF]

open access: yesApplied Mathematics & Optimization, 2015
The problem of identifying the diffusion parameter appearing in a nonlocal steady diffusion equation is considered. The identification problem is formulated as an optimal control problem having a matching functional as the objective of the control and the parameter function as the control variable.
D'Elia, M., Gunzburger, M.
openaire   +2 more sources

Nonlocal-in-Time Dynamics and Crossover of Diffusive Regimes

open access: yesInternational Journal of Numerical Analysis and Modeling, 2023
The aim of this paper is to study a simple nonlocal-in-time dynamic system proposed for the effective modeling of complex diffusive regimes in heterogeneous media. We present its solutions and their commonly studied statistics such as the mean square distance.
Qiang Du, Zhi Zhou
openaire   +3 more sources

Existence of positive S-asymptotically omega-periodic solutions of time-space fractional nonlocal reaction-diffusion equations

open access: yesElectronic Journal of Differential Equations
This article studies the asymptotically periodic problem of time-space fractional reaction-diffusion equations with nonlocal initial conditions on infinite intervals.
Xuping Zhang, Kaibo Ding, Pengyu Chen
doaj   +3 more sources

Stability and vegetation patterns driven by both nonlocal infiltration and nonlocal absorption in the extended Klausmeier model

open access: yesNonlinear Analysis
In this paper, we propose a dryland ecosystem model with both nonlocal infiltration and nonlocal absorption and investigate the influence of the nonlocal effect on the vegetation patterns.
Yunzhuo Lin, Yongli Song, Shuyang Xue
doaj   +1 more source

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