Results 21 to 30 of about 40,269 (290)

Mappings for Special Functions on Cantor Sets and Special Integral Transforms via Local Fractional Operators

open access: yesAbstract and Applied Analysis, 2013
The mappings for some special functions on Cantor sets are investigated. Meanwhile, we apply the local fractional Fourier series, Fourier transforms, and Laplace transforms to solve three local fractional differential equations, and the corresponding ...
Yang Zhao   +4 more
doaj   +1 more source

Fractional Transforms in Optical Information Processing

open access: yesEURASIP Journal on Advances in Signal Processing, 2005
We review the progress achieved in optical information processing during the last decade by applying fractional linear integral transforms. The fractional Fourier transform and its applications for phase retrieval, beam characterization, space-variant ...
Maria Luisa Calvo   +2 more
doaj   +1 more source

Fractional Equations for the Scaling Limits of Lévy Walks with Position-Dependent Jump Distributions

open access: yesMathematics, 2023
Lévy walks represent important modeling tools for a variety of real-life processes. Their natural scaling limits are known to be described by the so-called material fractional derivatives.
Vassili N. Kolokoltsov
doaj   +1 more source

Nonseparable two-dimensional fractional Fourier transform [PDF]

open access: yesApplied Optics, 1998
Previous generalizations of the fractional Fourier transform to two dimensions assumed separable kernels. We present a nonseparable definition for the two-dimensional fractional Fourier transform that includes the separable definition as a special case. Its digital and optical implementations are presented.
Sahin, A., Kutay, M. A., Ozaktas, H. M.
openaire   +6 more sources

Analysis of De-Levie’s model via modern fractional differentiations: An application to supercapacitor

open access: yesAlexandria Engineering Journal, 2019
De-Levie’s model has become an indispensable model for knowing a porous electrode because electrochemical supercapacitors provide electrical energy storage and they use nanoporous electrodes to store large amounts of charge.
Kashif Ali Abro   +3 more
doaj   +1 more source

A Note on Function Spaces with Fractional Fourier Transforms in Wiener-type Spaces

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2023
The purpose of this paper is to introduce and study a function space A_(α,w)^(B,Y) (R^d ) to be a linear space of functions h∈L_w^1 (R^d ) whose fractional Fourier transforms F_α h belong to the Wiener-type space W(B,Y)(R^d ), where w is a Beurling ...
Erdem Toksoy
doaj   +1 more source

Clifford algebras, Fourier transforms and quantum mechanics [PDF]

open access: yes, 2012
In this review, an overview is given of several recent generalizations of the Fourier transform, related to either the Lie algebra sl_2 or the Lie superalgebra osp(1|2).
De Bie, Hendrik
core   +2 more sources

Uniqueness results for the phase retrieval problem of fractional Fourier transforms of variable order [PDF]

open access: yes, 2010
In this paper, we investigate the uniqueness of the phase retrieval problem for the fractional Fourier transform (FrFT) of variable order. This problem occurs naturally in optics and quantum physics.
Jaming, Philippe
core   +3 more sources

On the fractional Fourier and continuous fractional wave packet transforms of almost periodic functions

open access: yesJournal of Inequalities and Applications, 2017
We state the fractional Fourier transform and the continuous fractional wave packet transform as ways for analyzing persistent signals such as almost periodic functions and strong limit power signals. We construct frame decompositions for almost periodic
Banu Ünalmış Uzun
doaj   +1 more source

A study on the thermoelastic interaction in two-dimension orthotropic materials under the fractional derivative model

open access: yesAlexandria Engineering Journal, 2023
The extended thermoelastic theory with fractional derivative is described in this article to estimate temperature variation, displacement components, and stress components in two-dimensional orthotropic materials.
Aatef Hobiny, Ibrahim A. Abbas
doaj   +1 more source

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