Results 1 to 10 of about 2,939,069 (250)

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

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   +2 more sources

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   +2 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

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

Data Reconstruction-Based Two-Step Non-Intrusive Reduced-Order Modeling Using Fourier Transform and Interpolations

open access: yesMathematics, 2022
This study presents a data reconstruction-based two-step non-intrusive reduced-order modeling (ROM) based on discrete Fourier transformation (DFT) and proper orthogonal decomposition-radial basis function (POD-RBF) interpolation.
Jonggeon Lee, Euiyoung Kim, Jaehun Lee
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

Intra-Pulse Modulation Recognition for Fractional Bandlimited Signals Based on a Modified MWC-Based Digital Receiver

open access: yesIEEE Access, 2020
In this paper, we present a modified modulated wideband converter (MWC)-based digital receiver for fractional bandlimited signals, and further propose an intra-pulse modulation recognition method in discrete time fractional Fourier domain (DTFrFD) for ...
Xiaomin Li, Huali Wang, Haichao Luo
doaj   +1 more source

Construction of Fair Dice Pairs

open access: yesMathematics, 2019
An interesting and challenging problem in mathematics is how to construct fair dice pairs. In this paper, by means of decomposing polynomials in a residue class ring and applying the Discrete Fourier Transformation, we present all the 2000 fair dice ...
Yong Huang   +5 more
doaj   +1 more source

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