Results 11 to 20 of about 20,022,546 (234)

A Reverse of the Cauchy-Bunyakovsky-Schwarz Integral Inequality for Complex-Valued Functions and Applications for Fourier Transform [PDF]

open access: yes, 2004
A reverse of the Cauchy-Bunyakovsky-Schwarz integral inequality for complex-valued functions and applications for the finite Fourier transform are ...
Hanna, George T   +2 more
core   +8 more sources

Radar matched filtering using the fractional fourier transform [PDF]

open access: yes, 2010
-A matched filter is the optimal linear filter for maximizing the signal to noise ratio (SNR) in the presence of additive noise. Matched filters are commonly used in radar systems where the transmitted signal is known and may be used as a replica to be ...
Clemente, Carmine   +2 more
core   +4 more sources

Error Estimates for Approximating the Fourier Transform of Functions of Bounded Variation [PDF]

open access: yes, 2004
In this paper we point out an approximation for the Fourier transform for functions of bounded variation and study the approximation error of certain associated quadrature ...
Hanna, George T   +2 more
core   +6 more sources

Error Estimates on Approximating the Finite Fourier Transform of Complex-Valued Functions via a Pre-Grüss Inequality [PDF]

open access: yes, 2004
Some estimates for the error in approximating the Finite Fourier Transform in terms of exponential means via a pre-Grüss inequality for complex-valued functions are ...
Hanna, George T   +2 more
core   +6 more sources

Digital processing of space images using global filtering in the frequency area [PDF]

open access: yesE3S Web of Conferences, 2021
In modern systems, remote sensing widespread two-dimensional fast Fourier transform (FFT) for processing satellite images and the subsequent image filtering.
Tutatchikov Valeriy, Noskov Mikhail
doaj   +1 more source

Analytical solutions to the advection-diffusion equation with Atangana-Baleanu time-fractional derivative and a concentrated loading

open access: yesAlexandria Engineering Journal, 2021
In this communication we have studied well known physical process of two-dimensional advection–diffusion phenomena. The advection–diffusion equation is time-fractionalized by exploiting Atangana-Baleanu fractional derivative operator.
Itrat Abbas Mirza   +4 more
doaj   +1 more source

A Two-Dimensional Precision Level for Real-Time Measurement Based on Zoom Fast Fourier Transform

open access: yesMicromachines, 2023
This paper proposes a two-dimensional precision level for real-time measurement using a zoom fast Fourier transform (zoom FFT)-based decoupling algorithm that was developed and integrated in an FPGA.
Haijin Fu   +8 more
doaj   +1 more source

Applications of Fourier transform infrared spectroscopy [PDF]

open access: yes, 2012
Podeu consultar el llibre complet a: http://hdl.handle.net/2445/32166This article summarizes the basic principles of Fourier Transform Infrared Spectroscopy, with examples of methodologies and applications to different field ...
Ferrer i Felis, Núria
core   +6 more sources

Fingerprint frequency normalisation and enhancement using two‐dimensional short‐time Fourier transform analysis

open access: yesIET Computer Vision, 2016
A fingerprint image with non‐uniform ridge frequencies can be considered as a two‐dimensional dynamic signal. A non‐uniform stress on the sensing area applied during fingerprint acquisition may result in a non‐linear distortion that disturbs the local ...
Mubeen Ghafoor   +2 more
doaj   +1 more source

One-dimensional Quaternion Fourier Transform and Some Applications

open access: yesBulletin of Computational Applied Mathematics, 2021
The Fourier transform is a very useful tool in many areas. This transform has been defined in many contexts, as complex numbers, quaternions, and Clifford algebras.
Eusebio Ariza García   +2 more
doaj  

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