Results 11 to 20 of about 10,853,875 (318)

Relation between the autocorrelation and Wigner functions

open access: green, 2013
We show a simple mechanism to measure the Wigner function of a harmonic oscillator. For this system we also show that autocorrelation and Wigner functions are equivalent.Comment: Modified title and slightly modified version from the one ...
H. M. Moya-Cessa   +1 more
openalex   +3 more sources

The local partial autocorrelation function and some applications [PDF]

open access: yesElectronic Journal of Statistics, 2020
The classical regular and partial autocorrelation functions are powerful tools for stationary time series modelling and analysis. However, it is increasingly recognized that many time series are not stationary and the use of classical global ...
Rebecca Killick   +3 more
semanticscholar   +1 more source

Time Series Model Analysis Using Autocorrelation Function (ACF) and Partial Autocorrelation Function (PACF) for E-wallet Transactions during a Pandemic

open access: yesInternational Journal of Global Operations Research, 2022
The use of e-wallet can be accessed easily via the internet, this can create a positive impact for economic stability after the Covid-19 pandemic. This can move the wheels of the community's economy, through online shopping and the use of e-wallet among ...
U. A. Yakubu, Moch Panji Agung Saputra
semanticscholar   +1 more source

Resolving Selected Problems in Surface Topography Analysis by Application of the Autocorrelation Function

open access: yesCoatings, 2022
In this paper, the validity of the application of an autocorrelation function for resolving some surface topography measurement problems was presented. Various types of surfaces were considered: plateau-honed, honed with burnished dimples, ground, turned,
P. Podulka
semanticscholar   +1 more source

Detection of Bolt Looseness Based on Average Autocorrelation Function

open access: yesShock and Vibration, 2021
Bolted connections are widely used in multiple engineering fields including aerospace and mechanical engineering due to their numerous advantages like the ability to bear relatively heavy loads, low costs, easy installation, and implementation.
Jigang Wu   +4 more
doaj   +1 more source

Autocorrelation Function for Dispersion-Free Fiber Channels With Distributed Amplification [PDF]

open access: yesIEEE Transactions on Information Theory, 2017
Optical fiber signals with high power exhibit spectral broadening that seems to limit capacity. To study spectral broadening, the autocorrelation function of the output signal given the input signal is derived for a simplified fiber model that has zero ...
G. Kramer
semanticscholar   +1 more source

Liver Backscatter and the Hepatic Vasculature’s Autocorrelation Function

open access: yesAcoustics, 2020
Ultrasound imaging of the liver is an everyday, worldwide clinical tool. The echoes are produced by inhomogeneities within the interrogated tissue, but what are the mathematical properties of these scatterers?
Jonathan J. Carroll-Nellenback   +3 more
doaj   +1 more source

Nonlinear FM waveform design to reduction of sidelobe level in autocorrelation function [PDF]

open access: yes2017 Iranian Conference on Electrical Engineering (ICEE), 2016
This paper will design non-linear frequency modulation (NLFM) signal for Chebyshev, Kaiser, Taylor, and raised-cosine power spectral densities (PSDs).
R. Ghavamirad, H. Babashah, M. Sebt
semanticscholar   +1 more source

Definition of the linearity loss of the surface temperature in static tensile tests [PDF]

open access: yesFracture and Structural Integrity, 2014
Static tensile tests on material for mechanical constructions have pointed out the linearity loss of the surface temperature with the application of load.
A. Risitano, G. Fargione, E. Guglielmino
doaj   +1 more source

The basis function approach for modeling autocorrelation in ecological data. [PDF]

open access: yesEcology, 2016
Analyzing ecological data often requires modeling the autocorrelation created by spatial and temporal processes. Many seemingly disparate statistical methods used to account for autocorrelation can be expressed as regression models that include basis ...
T. Hefley   +8 more
semanticscholar   +1 more source

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