Results 1 to 10 of about 5,448,204 (257)

An analytical process of spatial autocorrelation functions based on Moran's index.

open access: yesPLoS ONE, 2021
A number of spatial statistic measurements such as Moran's I and Geary's C can be used for spatial autocorrelation analysis. Spatial autocorrelation modeling proceeded from the 1-dimension autocorrelation of time series analysis, with time lag replaced ...
Yanguang Chen
doaj   +2 more sources

Universal hypothesis of autocorrelation function from Krylov complexity

open access: yesQuantum Frontiers
In a quantum many-body system, autocorrelation functions can determine linear responses nearby equilibrium and quantum dynamics far from equilibrium.
Ren Zhang, Hui Zhai
doaj   +2 more sources

On the Autocorrelation Function of 1/f Noises

open access: yesMathematics, 2022
The outputs of many real-world complex dynamical systems are time series characterized by power-law correlations and fractal properties. The first proposed model for such time series comprised fractional Gaussian noise (fGn), defined by an ...
Pedro Carpena, Ana V. Coronado
doaj   +1 more source

Linear Prediction Using Refined Autocorrelation Function

open access: yesEURASIP Journal on Audio, Speech, and Music Processing, 2007
This paper proposes a new technique for improving the performance of linear prediction analysis by utilizing a refined version of the autocorrelation function.
Shimamura Tetsuya, Rahman M Shahidur
doaj   +2 more sources

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

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

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

Decorrelation scales for Arctic Ocean hydrography – Part I: Amerasian Basin [PDF]

open access: yesOcean Science, 2018
Any use of observational data for data assimilation requires adequate information of their representativeness in space and time. This is particularly important for sparse, non-synoptic data, which comprise the bulk of oceanic in situ observations in ...
H. Sumata   +13 more
doaj   +1 more source

On one approximate method for recovering a function from its autocorrelation function

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022
Background. When solving many physical and technical problems, a situation arises when only operators (functionals) from the objects under study (signals, images, etc.) are available for observations (measurements). It is required to restore the object
I.V. Boykov, A.A. Pivkina
doaj   +1 more source

Estimation of phonon relaxation time for silicon by means of using the velocity autocorrelation function of atoms in molecular dynamics [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2019
Results of the ab initio molecular dynamics calculations of silicon crystals are presented by means of analysis of the velocity autocorrelation function and determination of mean phonon relaxation time.
B. Andriyevsky   +6 more
doaj   +1 more source

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