Results 1 to 10 of about 28,693 (307)

Solving Generalized Heat and Generalized Laplace Equations Using Fractional Fourier Transform

open access: yesFractal and Fractional, 2023
In the present work, the main objective is to find the solution of the generalized heat and generalized Laplace equations using the fractional Fourier transform, which is a general form of the solution of the heat equation and Laplace equation using the ...
Sri Sulasteri   +4 more
doaj   +4 more sources

A Novel Security Key Generation Method for SRAM PUF Based on Fourier Analysis

open access: yesIEEE Access, 2018
Most of the current security key generation schemes for static random access memory physical unclonable function (SRAM PUF) are based on a fuzzy extractor.
Wenchao Liu   +5 more
doaj   +2 more sources

A generalized Fourier–Hermite method for the Vlasov–Poisson system [PDF]

open access: yesBIT Numerical Mathematics, 2021
AbstractA generalized Fourier–Hermite semi-discretization for the Vlasov–Poisson equation is introduced. The formulation of the method includes as special cases the symmetrically-weighted and asymmetrically-weighted Fourier–Hermite methods from the literature.
Katharina Kormann, Anna Yurova
openaire   +2 more sources

Investigation of the Stress Strain State of the Layer with a Longitudinal Cylindrical Thick-Walled Tube and the Displacements Given at the Boundaries of the Layer [PDF]

open access: yesJournal of Mechanical Engineering, 2019
This paper proposes an analytical-numerical approach to solving the spatial prob-lem of the theory of elasticity for the layer with a circular cylindrical tube.
Vitaliy Yu. Miroshnikov
doaj   +1 more source

A Linear Elasticity Theory to Analyze the Stress State of an Infinite Layer with a Cylindrical Cavity under Periodic Load

open access: yesComputation, 2022
The design of parts of machines, mechanisms, structures and foundations, particularly in the aerospace industry, is closely related to the definition of the stress state of the body.
Vitaly Miroshnikov   +3 more
doaj   +1 more source

Investigation of the Stress State of a Composite in the Form of a Layer and a Half Space with a Longitudinal Cylindrical Cavity at Stresses Given on Boundary Surfaces [PDF]

open access: yesJournal of Mechanical Engineering, 2019
An analytical-numerical approach to solving the spatial problem of the theory of elasticity for a half-space rigidly coupled to a layer is proposed. In the half-space, parallel to its boundaries, there is an infinite circular cylindrical cavity. Both the
Vitalii Yu. Miroshnikov
doaj   +1 more source

Fourier methods for harmonic scalar waves in general waveguides [PDF]

open access: yesJournal of Engineering Mathematics, 2015
A set of semi-analytical techniques based on Fourier analysis is used to solve wave scattering problems in variously shaped waveguides with varying normal admittance boundary conditions. Key components are newly developed conformal mapping methods, wave splitting, Fourier series expansions in eigen-functions to non-normal operators, the building block ...
Andersson, Anders   +2 more
openaire   +3 more sources

Fourier analysis of multigrid methods for general systems of PDEs [PDF]

open access: yesMathematics of Computation, 1993
Most iteration methods for solving boundary value problems can be viewed as approximations of a time-dependent differential equation. In this paper we show that the multigrid method has the effect of increasing the time-step for the smooth part of the solution leading back to an increase of the convergence rate.
Lötstedt, Per, Gustafsson, Bertil
openaire   +1 more source

Frequency analysis of extreme daily rainfall over an arid zone of Iran using Fourier series method

open access: yesApplied Water Science, 2022
In this paper frequency analysis of annual extreme daily rainfall of 14 gauging stations located in an arid zone of Iran were performed using parametric and nonparametric approaches.
Parviz Haghighat jou   +1 more
doaj   +1 more source

Generalized Image Reconstruction in Optical Coherence Tomography Using Redundant and Non-Uniformly-Spaced Samples

open access: yesSensors, 2021
In this paper, we use Frame Theory to develop a generalized OCT image reconstruction method using redundant and non-uniformly spaced frequency domain samples that includes using non-redundant and uniformly spaced samples as special cases. We also correct
Karim Nagib   +4 more
doaj   +1 more source

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