Results 61 to 70 of about 928 (167)
A Nonstandard Dynamically Consistent Numerical Scheme Applied to Obesity Dynamics
Journal of Applied Mathematics, 2008 The obesity epidemic is considered a health concern of paramount importance in modern society. In this work, a nonstandard finite difference scheme has been developed with the aim to solve numerically a mathematical model for obesity population dynamics.
Rafael J. Villanueva +2 more
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Statistical Analysis and Data Mining: An ASA Data Science Journal, Volume 19, Issue 4, August 2026.ABSTRACT Conformity of observed data with a postulated probability distribution is a fundamental problem of statistical modeling. Current tools for checking distributional conformity are often limited to univariate settings, with extensions to multivariate distributions facing challenges in interpretability and power.
Rasha Alsaadawi, Nitai D. Mukhopadhyay
wiley +1 more source
Best practices in `0 K' DFT energy calculations on molecular crystal structures
Acta Crystallographica Section C, Volume 82, Issue 8, Page 383-400, August 2026.This article describes best practices for `zero Kelvin' energy calculations on molecular crystals and is targeted for non‐experts who would like to perform their own calculations or assess the accuracy and validity of such calculations reported in the scientific literature.This article describes best practices for `zero Kelvin' energy calculations on ...
Jacco van de Streek, Erin R. Johnson
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A construction of nonstandard finite difference scheme to fractional differential system
CQD Revista Eletrônica Paulista de Matemática, 2022 In this paper on the nonstandard finite difference technique is proposed to study numerically a fractional differential system. The Grünwald–Letnikov method is used to approximate the fractional derivatives.
Lislaine Cristina Cardoso +2 more
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Statistica Neerlandica, Volume 80, Issue 3, August 2026.Abstract Multi‐state models are a flexible framework for analysing processes that evolve through different states over time, with applications in medicine, demography, and economics, among others. A key quantity of interest is the state occupation probability, commonly estimated by the Aalen‐Johansen estimator.
Tianjiao Yan, Ronald Geskus, Hein Putter
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A Second-Order Nonstandard Finite Difference Method for a Malaria Propagation Model with Control
AppliedMathStandard numerical methods such as Runge–Kutta and Euler methods have been widely used to approximate solutions to nonlinear systems. These methods converge to the solution only for small step sizes; for larger time steps, they generally generate ...
Calisto B. Marime, Justin B. Munyakazi
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Numerical Investigation of a Diffusive SIR Model: Focus on Positivity Preservation
Mathematical Methods in the Applied Sciences, Volume 49, Issue 11, Page 11775-11793, 30 July 2026.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 +2 more
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Discover Applied SciencesThis article focuses on the numerical solution of a time-dependent parabolic problem that exhibits singular perturbations and involves two perturbation parameters. To address this problem, a fitted mesh finite difference method is developed. In numerical
Mekashaw Ali Mohye +5 more
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A New Stochastic Split-Step θ-Nonstandard Finite Difference Method for the Developed SVIR Epidemic Model with Temporary Immunities and General Incidence Rates. [PDF]
Vaccines (Basel), 2022 Alkhazzan A, Wang J, Nie Y, Hattaf K.
europepmc +1 more source