Results 71 to 80 of about 252,020 (241)

A nonstandard finite difference scheme for a time-fractional model of Zika virus transmission.

Mathematical biosciences and engineering : MBE
In this work, we investigate the transmission dynamics of the Zika virus, considering both a compartmental model involving humans and mosquitoes and an extended model that introduces a non-human primate (monkey) as a second reservoir host. The novelty of
Maghnia Hamou Maamar, Matthias Ehrhardt, L. Tabharit   +2 more
semanticscholar   +1 more source

Nonstandard finite differences numerical methods for a vegetation reaction–diffusion model

Journal of Computational and Applied Mathematics, 2023
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Conte D., Pagano G., Paternoster B.
openaire   +4 more sources

A highly accurate numerical method for solving boundary value problem of generalized Bagley‐Torvik equation

Mathematical Methods in the Applied Sciences, EarlyView.
A highly accurate numerical method is given for the solution of boundary value problem of generalized Bagley‐Torvik (BgT) equation with Caputo derivative of order 0<β<2$$ 0<\beta <2 $$ by using the collocation‐shooting method (C‐SM). The collocation solution is constructed in the space Sm+1(1)$$ {S}_{m+1}^{(1)} $$ as piecewise polynomials of degree at ...
Suzan Cival Buranay, Mtema James Chin, Nazim I. Mahmudov   +2 more
wiley   +1 more source

A monotone scheme for Hamilton-Jacobi equations via the nonstandard finite difference method [PDF]

, 2009
A usual way of approximating Hamilton-Jacobi equations is to couple space finite element discretization with time finite difference discretization. This classical approach leads to a severe restriction on the time step size for the scheme to be monotone.
Jean M.-S. Lubuma, Anguelov, Roumen, Roumen Anguelov, Lubuma, Jean M.-S., Minani, Froduald, Froduald Minani   +5 more
core   +1 more source

Numerical Investigation of a Diffusive SIR Model: Focus on Positivity Preservation

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In this paper, we consider a system of semilinear partial differential equations (PDEs) representing a spatially extended SIR epidemic model. A brief analytical investigation of the well‐posedness and positivity of the solutions is provided in the appendix, while the main focus is on the numerical treatment of the model.
Rahele Mosleh, Claudia Panico, Messoud Efendiyev   +2 more
wiley   +1 more source

SelExNet: A Self‐Supervised Physics‐Informed Framework for Multi‐Channel Joint RF and Gradient Waveform Optimization in 2D Spatially Selective Excitation

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To introduce SelExNet: a self‐supervised framework for two‐dimensional spatially selective excitation that jointly optimizes radiofrequency (RF) pulses and gradient waveforms, and extends to multi‐channel transmission MRI. Methods Building on prior RF‐only and joint RF‐gradient optimization approaches, SelExNet couples neural RF and ...
Yuliang Xiao, Jason Rock, Zhe Wu, Jamie Near, Mark Chiew, Simon J. Graham   +5 more
wiley   +1 more source

Moving Mesh Non-standard Finite Difference Method for Non-linear Heat Transfer in a Thin Finite Rod [PDF]

Journal of Applied and Computational Mechanics, 2018
In this paper, a moving mesh technique and a non-standard finite difference method are combined, and a moving mesh non-standard finite difference (MMNSFD) method is developed to solve an initial boundary value problem involving a quartic nonlinearity ...
Morteza Bisheh-Niasar, Maryam Arab Ameri
doaj   +1 more source

Applications of Nonstandard Finite Difference Schemes [PDF]

, 2000
Nonstandard finite difference schemes, R.E. Mickens nonstandard methods for advection-diffusion-reaction equations, H.V. Kojouharov and B.M. Chen application of nonstandard finite differences to solve the wave equation and Maxwell's equations, J.B. Cole nonstandard discretization methods for some biological models, H.
openaire   +1 more source

How Does Progressivity Affect the Tax Cut Multiplier?

International Economic Review, EarlyView.
ABSTRACT How does the targeting of personal income tax cuts affect the output multiplier? This paper provides quantitative evidence using a heterogeneous‐agent New‐Keynesian model calibrated to match US distributions of income, wealth, marginal tax rates, and marginal propensities to consume.
Christian Gillitzer
wiley   +1 more source

An explicit nonstandard finite difference scheme for the Allen-Cahn equation [PDF]

, 2015
We design explicit nonstandard finite difference schemes for the nonlinear Allen-Cahn reaction diffusion equation in the limit of very small interaction length ".
Aderogba, Adebayo Abiodun, Chapwanya, Michael   +1 more
core   +1 more source