Results 31 to 40 of about 2,522 (162)
Multifractal characterization of gold market: A multifractal detrended fluctuation analysis [PDF]
Physica A: Statistical Mechanics and its Applications, 2014 The multifractal detrended fluctuation analysis technique is employed to analyze the time series of gold consumer price index (CPI) and the market trend of three world's highest gold consuming countries, namely China, India and Turkey for the period: 1993-July 2013.
Provash Mali, Amitabha Mukhopadhyay
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Multifractal analysis of human retinal vessels [PDF]
IEEE Transactions on Medical Imaging, 2006 In this work it is shown that vascular structures of the human retina represent geometrical multifractals, characterized by a hierarchy of exponents rather then a single fractal dimension. A number of retinal images from the STARE database (www.parl.clemson.edu/stare) are analyzed, corresponding to both normal and pathological states of the retina.
Stosic, T., Stosic, B.
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Multifractal Analysis of Inhomogeneous Bernoulli Products [PDF]
Journal of Statistical Physics, 2011 We are interested to the multifractal analysis of inhomogeneous Bernoulli products which are also known as coin tossing measures. We give conditions ensuring the validity of the multifractal formalism for such measures. On another hand, we show that these measures can have a dense set of phase transitions.
Batakis, Athanasios, Testud, Benoît
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New Journal of Physics, 2015 Many complex systems generate multifractal time series which are long-range cross-correlated. Numerous methods have been proposed to characterize the multifractal nature of these long-range cross correlations.
Wen-Jie Xie +4 more
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Agribusiness, EarlyView.Abstract The vegetable market experiences significant price fluctuations due to the complex interplay of trend, cyclical, seasonal, and irregular factors. This study takes Korean green onions as an example and employs the Christiano–Fitzgerald filter and the CensusX‐13 seasonal adjustment methods to decompose its price into four components: trend ...
Yiyang Qiao, Byeong‐il Ahn
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Multifractal Analysis of Choquet Capacities
Advances in Applied Mathematics, 1998 The authors sketch that in some applications a capacity is a better tool as a measure and the simplest generalization relaxing additivity constraint. For a sequence of Choquet capacities, a reference measure and a sequence of partitions of the interval \(\left[ 0,1\right[ \) they define different types of multifractal spectrum functions following the ...
Véhel, Jacques Lévy, Vojak, Robert
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Scale-Specific Multifractal Medical Image Analysis [PDF]
Computational and Mathematical Methods in Medicine, 2013 Fractal geometry has been applied widely in the analysis of medical images to characterize the irregular complex tissue structures that do not lend themselves to straightforward analysis with traditional Euclidean geometry. In this study, we treat the nonfractal behaviour of medical images over large-scale ranges by considering their box-counting ...
Boris Braverman, Mauro Tambasco
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Multiscale characterization of pore spaces using multifractals analysis of scanning electronic microscopy images of carbonates [PDF]
Nonlinear Processes in Geophysics, 2011 Pore spaces heterogeneity in carbonates rocks has long been identified as an important factor impacting reservoir productivity. In this paper, we study the heterogeneity of carbonate rocks pore spaces based on the image analysis of scanning electron ...
M. S. Jouini, S. Vega, E. A. Mokhtar
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Deep Underground Science and Engineering, EarlyView.The effects of grout strength and thickness on the shear behavior of bolt–grout interfaces (BGI) under constant normal stiffness conditions are investigated. Shear strength, failure modes, and acoustic emission characteristics are examined. The findings reveal that grout strength exerts a significantly greater influence on BGI shear strength and ...
Sunhao Zhang +5 more
wiley +1 more source
Frontiers in Physics, 2020 The spatial distribution of a population is not homogeneous—some areas attract many residents, while others do not. The spatial distribution of stores and facilities that have been coevolving with that of the population is also heterogeneous.
Mariko I. Ito, Takaaki Ohnishi
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