Results 41 to 50 of about 1,372 (141)

Spatial Fractional Darcy’s Law on the Diffusion Equation with a Fractional Time Derivative in Single-Porosity Naturally Fractured Reservoirs

open access: yesEnergies, 2022
Due to the complexity imposed by all the attributes of the fracture network of many naturally fractured reservoirs, it has been observed that fluid flow does not necessarily represent a normal diffusion, i.e., Darcy’s law.
Fernando Alcántara-López   +4 more
doaj   +1 more source

A survey on fuzzy fractional differential and optimal control nonlocal evolution equations

open access: yes, 2017
We survey some representative results on fuzzy fractional differential equations, controllability, approximate controllability, optimal control, and optimal feedback control for several different kinds of fractional evolution equations.
Agarwal, Ravi P.   +4 more
core   +1 more source

Existence and Uniqueness Result for Fuzzy Fractional Order Goursat Partial Differential Equations

open access: yesFractal and Fractional
In this manuscript, we discuss fractional fuzzy Goursat problems with Caputo’s gH-differentiability. The second-order mixed derivative term in Goursat problems and two types of Caputo’s gH-differentiability pose challenges to dealing with Goursat ...
Muhammad Sarwar   +4 more
doaj   +1 more source

Quarter-Sweep Preconditioned Relaxation Method, Algorithm and Efficiency Analysis for Fractional Mathematical Equation

open access: yesFractal and Fractional, 2021
Research into the recent developments for solving fractional mathematical equations requires accurate and efficient numerical methods. Although many numerical methods based on Caputo’s fractional derivative have been proposed to solve fractional ...
Andang Sunarto   +4 more
doaj   +1 more source

Fractional differential equations solved by using Mellin transform

open access: yes, 2014
In this paper, the solution of the multi-order differential equations, by using Mellin Transform, is proposed. It is shown that the problem related to the shift of the real part of the argument of the transformed function, arising when the Mellin ...
Butera, Salvatore, Di Paola, Mario
core   +1 more source

Necessary and sufficient conditions for the fractional calculus of variations with Caputo derivatives

open access: yes, 2010
We prove optimality conditions for different variational functionals containing left and right Caputo fractional derivatives. A sufficient condition of minimization under an appropriate convexity assumption is given.
Agrawal   +31 more
core   +1 more source

Analytical solution of the time fractional Navier-Stokes equation

open access: yesAin Shams Engineering Journal, 2018
In this paper we will use the residual power series (RPS) method to generate the solution of the nonlinear time fractional Navier-Stokes equation in two dimensions in the form of a rapidly convergent series, where we adopted the definition of Caputo to ...
Khaled K. Jaber, Rami S. Ahmad
doaj   +1 more source

A Fractional Complex Permittivity Model of Media with Dielectric Relaxation

open access: yesFractal and Fractional, 2017
In this work, we propose a fractional complex permittivity model of dielectric media with memory. Debye’s generalized equation, expressed in terms of the phenomenological coefficients, is replaced with the corresponding differential equation by applying ...
Armando Ciancio   +1 more
doaj   +1 more source

An Efficient Technique of Fractional-Order Physical Models Involving ρ-Laplace Transform

open access: yesMathematics, 2022
In this article, the ρ-Laplace transform is paired with a new iterative method to create a new hybrid methodology known as the new iterative transform method (NITM).
Nehad Ali Shah   +3 more
doaj   +1 more source

Backward Linear Control Systems on Time Scales

open access: yes, 2010
We show how a linear control systems theory for the backward nabla differential operator on an arbitrary time scale can be obtained via Caputo's duality. More precisely, we consider linear control systems with outputs defined with respect to the backward
Pawluszewicz, Ewa, Torres, Delfim F. M.
core   +1 more source

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