Results 21 to 30 of about 209 (48)

Optimal control analysis of a mathematical model of malaria and COVID-19 co-infection dynamics

open access: yesJournal of Biological Dynamics
In this paper, we analyze a deterministic model of malaria and Corona Virus Disease 2019 co-infection within a homogeneous population. We first studied the single infection model of each disease and then the co-infection dynamics.
Abou Bakari Diabaté   +2 more
doaj   +1 more source

A parameter uniform fitted mesh method for a weakly coupled system of two singularly perturbed convection-diffusion equations [PDF]

open access: yes, 2018
In this paper, a boundary value problem for a singularly perturbed linear system of two second order ordinary differential equations of convection- diffusion type is considered on the interval [0, 1]. The components of the solution of this system exhibit
Kalaiselvan, Saravana Sankar   +2 more
core   +2 more sources

An analysis of the practical DPG method [PDF]

open access: yes, 2011
In this work we give a complete error analysis of the Discontinuous Petrov Galerkin (DPG) method, accounting for all the approximations made in its practical implementation.
Gopalakrishnan, Jay, Qiu, Weifeng
core  

Numerical Methods for a Nonlinear BVP Arising in Physical Oceanography [PDF]

open access: yes, 2013
In this paper we report and compare the numerical results for an ocean circulation model obtained by the classical truncated boundary formulation, the free boundary approach and a quasi-uniform grid treatment of the problem. We apply a shooting method to
Fazio, Riccardo, Jannelli, Alessandra
core  

A Class of Second Order Difference Approximation for Solving Space Fractional Diffusion Equations

open access: yes, 2012
A class of second order approximations, called the weighted and shifted Gr\"{u}nwald difference operators, are proposed for Riemann-Liouville fractional derivatives, with their effective applications to numerically solving space fractional diffusion ...
Deng, Weihua, Tian, WenYi, Zhou, Han
core   +1 more source

Solving 2^{nd} order parabolic system by simulations of Markov jump processes [PDF]

open access: yes, 1999
There are known methods of approximating the solution of parabolic 2^{nd} order systems by solving stochastic differential equations instead. The main idea is based on the fact that a stochastic differential equation defines a diffusion process ...
M. Rogina, N. Limić
core   +1 more source

Preserving energy resp. dissipation in numerical PDEs using the "Average Vector Field" method

open access: yes, 2012
We give a systematic method for discretizing Hamiltonian partial differential equations (PDEs) with constant symplectic structure, while preserving their energy exactly. The same method, applied to PDEs with constant dissipative structure, also preserves
Celledoni, E.   +6 more
core   +1 more source

An Equation-Free Approach for Second Order Multiscale Hyperbolic Problems in Non-Divergence Form

open access: yes, 2018
The present study concerns the numerical homogenization of second order hyperbolic equations in non-divergence form, where the model problem includes a rapidly oscillating coefficient function. These small scales influence the large scale behavior, hence
Arjmand, Doghonay, Kreiss, Gunilla
core   +1 more source

A first order system least squares method for the Helmholtz equation [PDF]

open access: yes, 2015
We present a first order system least squares (FOSLS) method for the Helmholtz equation at high wave number k, which always deduces Hermitian positive definite algebraic system.
Chen, Huangxin, Qiu, Weifeng
core  

First order least squares method with weakly imposed boundary condition for convection dominated diffusion problems

open access: yes, 2014
We present and analyze a first order least squares method for convection dominated diffusion problems, which provides robust L2 a priori error estimate for the scalar variable even if the given data f in L2 space.
Chen, Huangxin   +4 more
core   +1 more source

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