نتایج جستجو برای: discrete fractional calculus

تعداد نتایج: 275796  

Journal: :Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 2013

2011
Leo Brewin

By a simple argument it will be shown that for any positive definite smooth metric there exists a quadratically convergent discrete metric. That is, the fractional difference between the estimates of the length for a short path, calculated according to the smooth and discrete metrics, will be shown to satisfy ∆L/L = O(K∆) where K is the maximum Gaussian curvature on the coordinate hyperplanes a...

Journal: :European Journal of Mathematical Analysis 2023

In this research article, we present extensions of some classical inequalities such as Schweitzer, Pólya–Szegö, Kantorovich and Greub–Rheinboldt fractional calculus on time scales. To investigate generalizations types inequalities, use the scales Riemann–Liouville type integrals. We explore dynamic delta their symmetric nabla versions. A scale is an arbitrary nonempty closed subset real numbers...

2006
Mark M. Meerschaert Jeff Mortensen Stephen W. Wheatcraft

We develop the basic tools of fractional vector calculus including a fractional derivative version of the gradient, divergence, and curl, and a fractional divergence theorem and Stokes theorem. These basic tools are then applied to provide a physical explanation for the fractional advection–dispersion equation for flow in heterogeneous porous media. r 2005 Elsevier B.V. All rights reserved.

1998
Kiran M. Kolwankar Anil D. Gangal

The sets and curves of fractional dimension have been constructed and found to be useful at number of places in science [1]. They are used to model various irregular phenomena. It is wellknown that the usual calculus is inadequate to handle such structures and processes. Therefore a new calculus should be developed which incorporates fractals naturally. Fractional calculus, which is a branch of...

Journal: :Computational & Applied Mathematics 2021

Fractional calculus has been widely used in mathematical modeling of evolutionary systems with memory effect on dynamics. The main interest this work is to attest, through a statistical approach, how the hysteresis phenomenon, which describes type present biological systems, can be treated by fractional calculus. We also analyse contribution historical values function evaluation operators accor...

2005
G. MURUGUSUNDARAMOORTHY MASLINA DARUS

In this paper, we introduce a new class of functions which are analytic and univalent with negative coefficients defined by using a certain fractional calculus and fractional calculus integral operators. Characterization property,the results on modified Hadamard product and integrals transforms are discussed. Further, distortion theorem and radii of starlikeness and convexity are also determine...

Journal: :Journal of vibration and acoustics 2014
Mark M Meerschaert Robert J McGough

This paper develops new fractional calculus models for wave propagation. These models permit a different attenuation index in each coordinate to fully capture the anisotropic nature of wave propagation in complex media. Analytical expressions that describe power law attenuation and anomalous dispersion in each direction are derived for these fractional calculus models.

2008
Richard Magin Xu Feng Dumitru Baleanu

Nuclear magnetic resonance (NMR) is a physical phenomenon widely used to study complex materials. NMR is governed by the Bloch equation, a first order non-linear differential equation. Fractional order generalization of the Bloch equation provides an opportunity to extend its use to describe a wider range of experimental situations. Here we present a fractional generalization of the Bloch equat...

2010
Abdul-Wali MS Ajlouni Hussam A Al-Rabai'ah

BACKGROUND Sequel to the work on the quantization of nonconservative systems using fractional calculus and quantization of a system with Brownian motion, which aims to consider the dissipation effects in quantum-mechanical description of microscale systems. RESULTS The canonical quantization of a system represented classically by one-dimensional Fick's law, and the diffusion equation is carri...

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