Results 1 to 10 of about 285,989 (181)
Elementary constraints on autocorrelation function scalings [PDF]
Physical Review E, 2002 Elementary algebraic constraints on the form of an autocorrelation function C(tw+t,tw)= rule out some two-time scalings found in the literature as possible long-time asymptotic forms.
E. Vincent +3 more
core +3 more sources
On the Autocorrelation Function of 1/f Noises
Mathematics, 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
An analytical process of spatial autocorrelation functions based on Moran's index.
PLoS 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 +1 more source
Electronic Journal of Statistics, 2023 We propose a new autocorrelation measure for functional time series that we term spherical autocorrelation. It is based on measuring the average angle between lagged pairs of series after having been projected onto the unit sphere. This new measure enjoys several complimentary advantages compared to existing autocorrelation measures for functional data,
Yeh, Chi-Kuang +2 more
openaire +2 more sources
Linear Prediction Using Refined Autocorrelation Function
EURASIP 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
Maximal autocorrelation functions in functional data analysis [PDF]
Statistics and Computing, 2015 This paper proposes a new factor rotation for the context of functional principal components analysis. This rotation seeks to re-represent a functional subspace in terms of directions of decreasing smoothness as represented by a generalized smoothing metric.
Hooker, Giles, Roberts, Steven
openaire +4 more sources
Detection of Bolt Looseness Based on Average Autocorrelation Function
Shock 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
Acoustics, 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]
Fracture 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
Estimation of phonon relaxation time for silicon by means of using the velocity autocorrelation function of atoms in molecular dynamics [PDF]
Bulletin 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