Results 1 to 10 of about 15,774 (263)

A new gene tree algorithm employing DNA sequences of bovine genome using discrete Fourier transformation [PDF]

open access: yesPLoS ONE, 2023
Within the realms of human thoughts on nature, Fourier analysis is considered as one of the greatest ideas currently put forwarded. The Fourier transform shows that any periodic function can be rewritten as the sum of sinusoidal functions.
Roxana Abadeh   +3 more
doaj   +3 more sources

Application of two-bit dithered Discrete Fourier basis functions in electricity measurement [PDF]

open access: yesJournal on Processing and Energy in Agriculture, 2021
The paper defines an algorithm for generating two-bit dithered discrete Fourier basis functions (DDFBF) used in a Stochastic Digital Discrete Fourier Transformation (SDDFT) processor.
Đorđević-Kozarov Jelena   +4 more
doaj   +1 more source

The effect of closed loop control on diagnostic indices in different faults of squirrel cage induction motor [PDF]

open access: yesArchives of Electrical Engineering, 2021
The aim of this work is to study the influence of closed loop control on diagnostic indices of both broken bar and mixed air-gap eccentricity fault indices of the squirrel cage induction motor drive.
Nourelhouda Bouabid   +3 more
doaj   +1 more source

Digital signal processing in telecommunications based on parametric discrete Fourier transform [PDF]

open access: yesITM Web of Conferences, 2019
A generalization of the discrete Fourier transform in the form of a parametric discrete Fourier transform is proposed. The analytical and stochastic properties of the introduced discrete transformation are investigated.
Ponomareva Olga   +2 more
doaj   +1 more source

Sliding signal processing in telecommunication networks based on two-dimensional discrete Fourier transform [PDF]

open access: yesITM Web of Conferences, 2019
A method of vertical sliding processing of two-dimensional discrete signals in the spatial frequency domain is proposed — a method of fast vertically sliding two-dimensional discrete Fourier transform.
Ponomarev Vladimir   +3 more
doaj   +1 more source

Determination of dissipated Energy in Fatigue Crack Propagation Experiments with Lock-In Thermography

open access: yesFracture and Structural Integrity, 2019
Lock-In thermography can be used to investigate elastic stresses and dissipative effects in dynamic processes like crack propagation. The evaluation normally is performed with a Discrete Fourier Transformation resulting in E- and D-Amplitude and phase ...
Jurgen Bar, Ralf Urbanek
doaj   +3 more sources

FREQUENCY DETERMINATION OF PULSE SIGNAL WITH CONSTANT BEAT BY DINT OF RECURRENT USAGE OF FOURIER TRANSFORM [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2018
The paper proposes an algorithm for frequency estimation of a pulse signal with constant beat under significant distortion conditions with the use of spectral analysis methods.
Ilina Е.S.   +2 more
doaj   +1 more source

Alternatives to the discrete fourier transform [PDF]

open access: yes2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
It is well-known that the discrete Fourier transform (DFT) of a finite length discrete-time signal samples the discrete-time Fourier transform (DTFT) of the same signal at equidistant points on the unit circle. Hence, as the signal length goes to infinity, the DFT approaches the DTFT.
Doru-Cristian Balcan   +3 more
openaire   +1 more source

On Derivation of Discrete Time Fourier Transform from Its Continuous Counterpart [PDF]

open access: yesInternational Journal of Electronics and Telecommunications, 2020
This paper is devoted to some problems that appear in derivations of the discrete time Fourier transform from a formula for its continuous time counterpart for transformation from the time into the frequency domain as well as to those regarding ...
Andrzej Borys
doaj   +1 more source

Fourier-spectral-method implementation of deformation in the phase-field crystal model [PDF]

open access: yesMATEC Web of Conferences, 2018
The phase-field crystal (PFC) method is a promising computational model with atomistic resolution and diffusive time scale. In this work, the Fourier-spectral-method (FSM) scheme was developed for evaluating the PFC free energy of a system subjected ...
Pisutha-Arnond Nirand
doaj   +1 more source

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