A review on variable-order fractional differential equations: mathematical foundations, physical models, numerical methods and applications

HG Sun, A Chang, Y Zhang, W Chen - Fractional Calculus and …, 2019 - degruyter.com
Variable-order (VO) fractional differential equations (FDEs) with a time (t), space (x) or other
variables dependent order have been successfully applied to investigate time and/or space …

Applications of variable-order fractional operators: a review

S Patnaik, JP Hollkamp… - Proceedings of the …, 2020 - royalsocietypublishing.org
Variable-order fractional operators were conceived and mathematically formalized only in
recent years. The possibility of formulating evolutionary governing equations has led to the …

A cardinal approach for nonlinear variable-order time fractional Schrödinger equation defined by Atangana–Baleanu–Caputo derivative

MH Heydari, A Atangana - Chaos, Solitons & Fractals, 2019 - Elsevier
This paper is concerned with an operational matrix method based on the shifted Legendre
cardinal functions for solving the nonlinear variable-order time fractional Schrödinger …

King algorithm: A novel optimization approach based on variable-order fractional calculus with application in chaotic financial systems

S Soradi-Zeid, H Jahanshahi, A Yousefpour… - Chaos, Solitons & …, 2020 - Elsevier
In this study, a new optimization algorithm, called King, is introduced for solving variable
order fractional optimal control problems (VO-FOCPs). The variable order fractional …

A new direct method based on the Chebyshev cardinal functions for variable-order fractional optimal control problems

MH Heydari - Journal of the Franklin Institute, 2018 - Elsevier
In this paper, a new direct method based on the Chebyshev cardinal functions is proposed
to solve a class of variable-order fractional optimal control problems (V-OFOCPs). To this …

A wavelet approach for solving multi-term variable-order time fractional diffusion-wave equation

MH Heydari, Z Avazzadeh, MF Haromi - Applied Mathematics and …, 2019 - Elsevier
We firstly generalize a multi-term time fractional diffusion-wave equation to the multi-term
variable-order time fractional diffusion-wave equation (MV-TFD-E) by the concept of variable …

Chebyshev cardinal wavelets for nonlinear stochastic differential equations driven with variable-order fractional Brownian motion

MH Heydari, Z Avazzadeh, MR Mahmoudi - Chaos, Solitons & Fractals, 2019 - Elsevier
This paper is concerned with a computational approach based on the Chebyshev cardinal
wavelets for a novel class of nonlinear stochastic differential equations characterized by the …

Piecewise Chebyshev cardinal functions: Application for constrained fractional optimal control problems

MH Heydari, M Razzaghi - Chaos, Solitons & Fractals, 2021 - Elsevier
In this paper, a new set of basis functions called the piecewise Chebyshev cardinal functions
is generated to investigate a class of constrained fractional optimal control problems. These …

A meshfree approach for solving 2D variable-order fractional nonlinear diffusion-wave equation

Y Shekari, A Tayebi, MH Heydari - Computer Methods in Applied …, 2019 - Elsevier
This paper is concerned with the moving least squares (MLS) meshless approach for the
numerical solution of two-dimensional (2D) variable-order time fractional nonlinear diffusion …

A computational method for solving variable-order fractional nonlinear diffusion-wave equation

MH Heydari, Z Avazzadeh, Y Yang - Applied Mathematics and …, 2019 - Elsevier
In this paper, we generalize a one-dimensional fractional diffusion-wave equation to a one-
dimensional variable-order space-time fractional nonlinear diffusion-wave equation (V-OS …