Results 31 to 40 of about 42,784 (333)

Fractional-Order Thermoelastic Wave Assessment in a Two-Dimensional Fiber-Reinforced Anisotropic Material

open access: yesMathematics, 2020
The present work is aimed at studying the effect of fractional order and thermal relaxation time on an unbounded fiber-reinforced medium. In the context of generalized thermoelasticity theory, the fractional time derivative and the thermal relaxation ...
Samah Horrigue, Ibrahim A. Abbas
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

Relationships among ray optical, Gaussian beam, and fractional Fourier transform descriptions of first-order optical systems [PDF]

open access: yes, 1997
Cataloged from PDF version of article.Although wave optics is the standard method of analyzing systems composed of a sequence of lenses separated by arbitrary distances, it is often easier and more intuitive to ascertain the function and properties of ...
Erden, M. F., Ozaktas, H. M.
core   +1 more source

Peak to average power ratio reduction in NC–OFDM systems [PDF]

open access: yes, 2015
Non contiguous orthogonal frequency division multiplexing (NC-OFDM) is an efficient and adaptable multicarrier modulation scheme to be used in cognitive radio communications.
Ghafoor, Abdul   +2 more
core   +1 more source

A transition integral transform obtained from generalization of the Fourier transform

open access: yesAin Shams Engineering Journal, 2019
We introduce a generalized integral transform (GIT) whose integration path lies on the complex plane. The GIT has both bilateral and unilateral versions, and generalizes a set of known integral transforms, e.g. Fourier, Laplace, allowing to solve integro-
Rafael G. González-Acuña   +1 more
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

Application of Fractional Fourier Transform for Prediction of Ball Mill Loads Using Acoustic Signals

open access: yesIEEE Access, 2019
In cement plant and power plant, ball mills remain in current and widespread use. The load parameter inside a ball mill directly impacts the stability of the production process, the grinding production rate, and the quality of the product in the grinding
Jianquan Shi, Gangquan Si, Yanbin Zhang
doaj   +1 more source

Fractional Fourier transforms and their optical implementation: I [PDF]

open access: yes, 1993
Cataloged from PDF version of article.Fourier transforms of fractional order a are defined in a manner such that the common Fourier transform is a special case with order a = 1.
Mendlovic, D., Ozaktas, H. M.
core   +1 more source

Two-Dimensional Discrete Coupled Fractional Fourier Transform (DCFrFT)

open access: yesFractal and Fractional
The fractional Fourier transform is critical in signal processing and supports many applications. Signal processing is one notable application. Implementing the fractional Fourier transform requires discrete versions.
Asma Elshamy   +2 more
doaj   +1 more source

Optical Image Encryption Using a Nonlinear Joint Transform Correlator and the Collins Diffraction Transform

open access: yesPhotonics, 2019
The Collins diffraction transform (CDT) describes the optical wave diffraction from the generic paraxial optical system. The CDT has as special cases the diffraction domains given by the Fourier, Fresnel and fractional Fourier transforms.
Juan M. Vilardy O.   +2 more
doaj   +1 more source

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