نتایج جستجو برای: multifractal

تعداد نتایج: 3148  

2015
Dustin Fetterhoff Robert A. Kraft Roman A. Sandler Ioan Opris Cheryl A. Sexton Vasilis Z. Marmarelis Robert E. Hampson Sam A. Deadwyler

Fractality, represented as self-similar repeating patterns, is ubiquitous in nature and the brain. Dynamic patterns of hippocampal spike trains are known to exhibit multifractal properties during working memory processing; however, it is unclear whether the multifractal properties inherent to hippocampal spike trains reflect active cognitive processing. To examine this possibility, hippocampal ...

1995
Rudolf H. Riedi

There are strong reasons to believe that the multifractal spectrum of DLA shows anomalies which have been termed left sided ME, M]. In order to show that this is compatible with strictly multiplicative structures Mandelbrot et al. M, MEH] introduced a one parameter family of multifractal measures invariant under innnitely many linear maps on the real line. Under the assumption that the usual mu...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2010
Sunny W Y Tam Tom Chang Paul M Kintner Eric M Klatt

The rank-ordered multifractal analysis (ROMA), a recently developed technique that combines the ideas of parametric rank ordering and one-parameter scaling of monofractals, has the capabilities of deciphering the multifractal characteristics of intermittent fluctuations. The method allows one to understand the multifractal properties through rank-ordered scaling or nonscaling parametric variabl...

Journal: :Annales UMCS, Informatica 2014
Pawel Dymora Miroslaw Mazurek Kamil Zelazny

The major goal of this article was to evaluate the efficiency of Linux operating system using statistical self-similarity and multifractal analysis. In order to collect the necessary data, the tools available in Linux such as vmstat, top and iostat were used. The measurement data collected with those tools had to be converted into a format acceptable by applications which analyze statistical se...

Journal: :American journal of perinatology 2011
Muriel Doret Hannes Helgason Patrice Abry Paulo Goncalves Claude Gharib Pascal Gaucherand

We performed multifractal analysis of fetal heart rate (FHR) variability in fetuses with and without acidosis during labor. Multifractal analysis was performed on fetal electrocardiograms in 10-minute sliding windows within the last 2 hours before delivery in 45 term fetuses divided in three groups according to umbilical arterial pH and FHR pattern: group A had pH ≥7.30 and normal FHR, group B ...

2015
Dusan Stošić Darko Stošić Tatijana Stošić H. Eugene Stanley Luiz Freire Manoel de Medeiros

We study auto-correlations and cross-correlations of daily price changes and daily volume changes of thirteen global stock market indices, using multifractal detrended fluctuation analysis (MF-DFA) and multifractal detrended cross-correlation analysis (MF-DXA). We find rather distinct multifractal behavior of price and volume changes. Our results indicate that the time series of price changes a...

2004
H. T. Teng

Fractal dimension has been found not suitable to be used solely in classifying natural earth terrain. This is due to the fact that surfaces with different texture may portray similar fractal dimensions. Evertsz and Mandelbrot [Evertsz, et. al. 1992] suggested that multifractal dimension may be a more appropriate parameter than fractal dimension in describing geometrical properties of a fractal ...

2010
P. Kestener P. A. Conlon A. Khalil L. Fennell R. T. J. McAteer P. T. Gallagher A. Arneodo

The multifractal nature of solar photospheric magnetic structures are studied using the 2D wavelet transform modulus maxima (WTMM) method. This relies on computing partition functions from the wavelet transform skeleton defined by the WTMM method. This skeleton provides an adaptive spacescale partition of the fractal distribution under study, from which one can extract the multifractal singular...

Journal: :CoRR 2011
Pawel Oswiecimka Jaroslaw Kwapien Iwona Celinska Stanislaw Drozdz Rafal Rak

In this work we perform a fractal analysis of 160 pieces of music belonging to six different genres. We show that the majority of the pieces reveal characteristics that allow us to classify them as physical processes called the 1/f (pink) noise. However, this is not true for classical music represented here by Frederic Chopin’s works and for some jazz pieces that are much more correlated than t...

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