Results 1 to 10 of about 1,096,865 (195)

On Recovery of the Singular Differential Laplace—Bessel Operator from the Fourier–Bessel Transform [PDF]

open access: yesMathematics, 2023
This paper is devoted to the problem of the best recovery of a fractional power of the B-elliptic operator of a function on R+N by its Fourier–Bessel transform known approximately on a convex set with the estimate of the difference between Fourier–Bessel
Sergey M. Sitnik   +3 more
doaj   +5 more sources

Fault diagnosis method of rolling-element bearings via FBEWT and EIRVM [PDF]

open access: yesScientific Reports
Prompt and accurate detection of rolling-element-bearing defects is essential for the reliable operation of rotating equipment. This study presents an enhanced diagnostic strategy that couples Fourier–Bessel empirical wavelet transform (FBEWT) with an ...
Qingshou Zheng   +5 more
doaj   +2 more sources

Null-image effect of planar coils over a grounded ferrite slab [PDF]

open access: yesScientific Reports
This paper presents a rigorous formulation based on the inverse Fourier–Bessel transform to determine the contribution of non-conservative electric fields (or vector potentials) due to a circular current filament from the actual and image currents ...
Ruey-Bing Hwang
doaj   +2 more sources

The Continuous Wavelet Transform for a q-Bessel Type Operator

open access: yesInternational Journal of Analysis and Applications, 2022
In this paper, we consider a differential operator on - By accomplishing harmonic analysis tools with respect to the operator we study some definitions and properties of q-Bessel continuous wavelet transform.
C.P. Pandey, Jyoti Saikia
doaj   +1 more source

Some Upper Bounds for RKHS Approximation by Bessel Functions

open access: yesAxioms, 2022
A reproducing kernel Hilbert space (RKHS) approximation problem arising from learning theory is investigated. Some K-functionals and moduli of smoothness with respect to RKHSs are defined with Fourier–Bessel series and Fourier–Bessel transforms ...
Mingdang Tian   +2 more
doaj   +1 more source

Flattened Gaussian focal spot with uniform phase produced by photon sieve

open access: yesHeliyon, 2023
The equivalent pupil and the point spread function constitute the Fourier–Bessel transform relation. Based on this, we established the equivalent pupil function theory of rotating symmetric photon sieve and derived the Fourier transform of the flattened ...
Changjie Cheng   +4 more
doaj   +1 more source

Fault diagnosis of gearbox based on Fourier Bessel EWT and manifold regularization ELM

open access: yesScientific Reports, 2023
The novel fault diagnosis method of gearbox based on Fourier Bessel series expansion-based empirical wavelet transform (FBEWT) and manifold regularization extreme learning machine (MRELM) is proposed to obtain excellent fault diagnosis results of gearbox
Ke Wang, Fengqing Qin
doaj   +1 more source

Computation of Fourier transform representations involving the generalized Bessel matrix polynomials

open access: yesAdvances in Difference Equations, 2021
Motivated by the recent studies and developments of the integral transforms with various special matrix functions, including the matrix orthogonal polynomials as kernels, in this article we derive the formulas for Fourier cosine and sine transforms of ...
M. Abdalla, M. Akel
doaj   +1 more source

Beurling's theorems and inversion formulas for certain index transforms [PDF]

open access: yesOpuscula Mathematica, 2009
The familiar Beurling theorem (an uncertainty principle), which is known for the Fourier transform pairs, has recently been proved by the author for the Kontorovich-Lebedev transform.
Semyon B. Yakubovich
doaj   +1 more source

Automated Emotion Identification Using Fourier–Bessel Domain-Based Entropies

open access: yesEntropy, 2022
Human dependence on computers is increasing day by day; thus, human interaction with computers must be more dynamic and contextual rather than static or generalized.
Aditya Nalwaya   +2 more
doaj   +1 more source

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