Results 1 to 10 of about 1,247,091 (131)

A finite difference method for piecewise deterministic processes with memory

open access: yesMathematical Modelling and Analysis, 2007
In this paper the numerical approximation of solutions of Liouville‐Master Equation for time‐dependent distribution functions of Piecewise Deterministic Processes with memory is considered.
Mario Annunziato
doaj   +5 more sources

A parameter uniform method for two-parameter singularly perturbed boundary value problems with discontinuous data

open access: yesMethodsX, 2023
We consider two-parameter singularly perturbed problems of reaction-convection-diffusion type in one dimension. The convection coefficient and source term are discontinuous at a point in the domain.
Nirmali Roy, Anuradha Jha
doaj   +1 more source

A mathematical system of COVID-19 disease model: Existence, uniqueness, numerical and sensitivity analysis

open access: yesMethodsX, 2023
A compartmental mathematical model of spreading COVID-19 disease in Wuhan, China is applied to investigate the pandemic behaviour in Iran. This model is a system of seven ordinary differential equations including individual behavioural reactions ...
Khadijeh Sadri   +2 more
doaj   +1 more source

Multiplicative finite difference methods [PDF]

open access: yesQuarterly of Applied Mathematics, 2009
Based on multiplicative calculus, the finite difference schemes for the numerical solution of multiplicative differential equations and Volterra differential equations are presented. Sample problems were solved using these new approaches.
Rıza, Mustafa   +2 more
openaire   +2 more sources

Finite-Difference-Impedance Method for Time-Delay Systems

open access: yesIEEE Access, 2022
The stability issues assessment by the impedance-based method demands the computation of accurate small-signal models. However, obtaining impedance models can be a time-consuming task if analytical models or the perturbation-based method are used ...
Juan Segundo-Ramirez   +3 more
doaj   +1 more source

Suitable Methods for Solving COVID-19 Model in Iraq

open access: yesWasit Journal for Pure Sciences, 2023
Because the Coronavirus epidemic spread in Iraq, the COVID-19 epidemic of people quarantined due to infection is our application in this work. The numerical simulation methods used in this research are more suitable than other analytical and numerical ...
Maha A.Mohammed, Mahdi A. Sabea
doaj   +1 more source

On the convergence of difference schemes of high accuracy for the equation of ion-acoustic waves in a magnetized plasma

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2022
Multiparametric difference schemes of the finite element method of a high order of accuracy for the Sobolevtype equation of the fourth-order in time are studied. In particular, the first boundary value problem for the equation of ion-acoustic waves in a
M.M. Aripov, D. Utebaev, Zh.A. Nurullaev
doaj   +1 more source

Hybrid finite difference/finite element immersed boundary method [PDF]

open access: yes, 2017
The immersed boundary method is an approach to fluid-structure interaction that uses a Lagrangian description of the structural deformations, stresses, and forces along with an Eulerian description of the momentum, viscosity, and incompressibility of ...
Griffith, Boyce E., Luo, Xiaoyu
core   +3 more sources

Finite-difference analysis for the linear thermoporoelasticity problem and its numerical resolution by multigrid methods

open access: yesMathematical Modelling and Analysis, 2012
This paper deals with the numerical solution of a two-dimensional thermoporoelasticity problem using a finite-difference scheme. Two issues are discussed: stability and convergence in discrete energy norms of the finite-difference scheme are proved, and ...
Natalia Boal   +3 more
doaj   +1 more source

Real space finite difference method for conductance calculations [PDF]

open access: yes, 2004
We present a general method for calculating coherent electronic transport in quantum wires and tunnel junctions. It is based upon a real space high order finite difference representation of the single particle Hamiltonian and wave functions.
A. Levy Yeyati   +11 more
core   +4 more sources

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