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Title: Long-range time dependence in the cross-correlation function

Long-range time dependence in the cross-correlation function Detection of a long-range time dependence in the radial cross-correlation function is normally difficult because of the oscillatory behavior of the cross-correlation tail, its low level of coherence, and noise contamination. This problem persists, even with large statistical samples. In this paper, a method for investigating long-range dependence in a single time series is extended to the calculation of the cross-correlation function. With this method and for time series with long-range time correlations, the accuracy of the determination of the cross-correlation function for long time lags is improved. The method is tested by applying it to fractional Gaussian noise and to the fluxes in a running sandpile model. This analysis technique can be applied to the detection of avalanche-type transport in magnetic confinement devices. {copyright} {ital 1999 American Institute of Physics.}
Authors: ; ; ;
Publication Date:
OSTI Identifier:295517
Resource Type:Journal Article
Data Type:
Resource Relation:Journal Name: Physics of Plasmas; Journal Volume: 6; Journal Issue: 2; Other Information: PBD: Feb 1999
Country of Publication:United States
Language:English
Subject: 70 PLASMA PHYSICS AND FUSION; CHARGED-PARTICLE TRANSPORT THEORY; CORRELATIONS; NOISE; PLASMA; FLUCTUATIONS