Results 11 to 20 of about 5,981 (227)

Numerical solution of sixth-order boundary-value problems using Legendre wavelet collocation method

open access: yesResults in Physics, 2018
An efficient method is proposed to approximate sixth order boundary value problems. The proposed method is based on Legendre wavelet in which Legendre polynomial is used.
Muhammad Sohaib   +3 more
doaj   +3 more sources

WAVELET SOLUTIONS OF THE KLEIN-GORDON EQUATION [PDF]

open access: yesJournal of Mahani Mathematical Research, 2012
In this paper, The numerical solutions of the Klein-Gordon equations using Legendre wavelets are investigated. The interest is in solving the problem using the wavelet basis due to its simplicity and efficiency in numerical approximations.
Esmail Hesameddini, S. Shekarpaz
doaj   +1 more source

Sparse polynomial approximation of parametric elliptic PDEs. Part I: affine coefficients [PDF]

open access: yes, 2016
We consider elliptic partial differential equations with diffusion coefficients that depend affinely on countably many parameters. We study the summability properties of polynomial expansions of the function mapping parameter values to solutions of the ...
Bachmayr, Markus   +2 more
core   +5 more sources

A New Method for Dynamical System Identification by Optimizing the Control Parameters of Legendre Multiwavelet Neural Network

open access: yesMathematics, 2023
Wavelet neural networks have been widely applied to dynamical system identification fields. The most difficult issue lies in selecting the optimal control parameters (the wavelet base type and corresponding resolution level) of the network structure ...
Xiaoyang Zheng   +3 more
doaj   +1 more source

Scale-discretised ridgelet transform on the sphere [PDF]

open access: yes, 2019
We revisit the spherical Radon transform, also called the Funk-Radon transform, viewing it as an axisymmetric convolution on the sphere. Viewing the spherical Radon transform in this manner leads to a straightforward derivation of its spherical harmonic ...
candes   +12 more
core   +2 more sources

On the estimation of functions belonging to Lipschitz class by block pulse functions and hybrid Legendre polynomials

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2020
In this paper, block pulse functions and hybrid Legendre polynomials are introduced. The estimators of a function $f$ having first and second derivative belonging to $Lip_\alpha[a,b]$ class, $0 < \alpha \leq 1$, and $a$, $b$ are finite real numbers, by ...
S. Lal, V.K. Sharma
doaj   +1 more source

Legendre approximation solution for a class of higher-order Volterra integro-differential equations

open access: yesAin Shams Engineering Journal, 2012
The aim of this work is to study the Legendre wavelets for the solution of boundary value problems for a class of higher order Volterra integro-differential equations using function approximation.
S.G. Venkatesh   +2 more
doaj   +1 more source

A New Operational Matrix of Fractional Derivatives to Solve Systems of Fractional Differential Equations via Legendre Wavelets

open access: yesMathematics, 2018
This paper introduces a new numerical approach to solving a system of fractional differential equations (FDEs) using the Legendre wavelet operational matrix method (LWOMM).
Aydin Secer, Selvi Altun
doaj   +1 more source

Legendre Multiwavelet Transform and Its Application in Bearing Fault Detection

open access: yesApplied Sciences, 2023
Bearing failures often result from compound faults, where the characteristics of these compound faults span across multiple domains. To tackle the challenge of extracting features from compound faults, this paper proposes a novel fault detection method ...
Xiaoyang Zheng   +3 more
doaj   +1 more source

Combined variational iteration method with chebyshev wavelet for the solution of convection-diffusion-reaction problem

open access: yesMehran University Research Journal of Engineering and Technology, 2023
The goal of the work is to solve the nonlinear convection-diffusion-reaction problem using the variational iteration method with the combination of the Chebyshev wavelet.
Muhammad Memon   +2 more
doaj   +1 more source

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