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Within framework of the quantum calculus, we represent the partition function and the mass exponent of a multifractal, as well as the average of random variables distributed over self-similar set, on the basis of the deformed expansion in…

统计力学 · 物理学 2009-07-24 Alexander Olemskoi , Irina Shuda

While numerous examples of fractal spaces may be found in various fields of science, the flow of time is typically assumed to be one-dimensional and smooth. Here we present a metamaterial-based physical system, which can be described by…

光学 · 物理学 2012-03-22 Igor I. Smolyaninov

In this work we analyse how scaling properties of Yang-Mills field theory manifest as self-similarity of truncated n-point functions by scale evolution. The presence of such structures, which actually behaves as fractals, allow for…

高能物理 - 理论 · 物理学 2020-02-26 Airton Deppman , Eugenio Megias , Debora P. Menezes

In this work, we present a mathematical model to describe the adsorption-diffusion process on fractal porous materials. This model is based on the fractal continuum approach and considers the scale-invariant properties of the surface and…

Using a generalization of vector calculus for space with non-integer dimension, we consider elastic properties of fractal materials. Fractal materials are described by continuum models with non-integer dimensional space. A generalization of…

材料科学 · 物理学 2015-03-12 Vasily E. Tarasov

Fractal-like structures of varying complexity are common in nature, and measure-based dimensions (Minkowski, Hausdorff) supply their basic geometric characterization. However, at the level of fundamental dynamics, which is quantum,…

高能物理 - 格点 · 物理学 2023-03-13 Ivan Horváth , Peter Markoš , Robert Mendris

Let $\mathcal{P}_n$ be the set of all probability mass functions (PMFs) $(p_1,p_2,\ldots,p_n)$ that satisfy $p_i>0$ for $1\leq i \leq n$. Define the minimum expected length function $\mathcal{L}_D :\mathcal{P}_n \rightarrow \mathbb{R}$ such…

信息论 · 计算机科学 2019-03-12 Shivkumar K. Manickam

A two parameter generalization of Boltzmann-Gibbs-Shannon entropy based on natural logarithm is introduced. The generalization of the Shannon-Kinchinn axioms corresponding to the two parameter entropy is proposed and verified. We present…

统计力学 · 物理学 2013-03-08 R. Chandrashekar , C. Ravikumar , J. Segar

Fractal/non-fractal morphological transitions allow for the systematic study of the physics behind fractal morphogenesis in nature. In these systems, the fractal dimension is considered a non-thermal order parameter, commonly and…

斑图形成与孤子 · 物理学 2020-01-27 J. R. Nicolás-Carlock , J. M. Solano-Altamirano , J. L. Carrillo-Estrada

The notion of the abundance of fractals is critically re-examined in light of surprising data regarding the scaling range in empirical reports on fractality.

无序系统与神经网络 · 物理学 2016-08-31 David Avnir , Ofer Biham , Daniel A. Lidar , Ofer Malcai

We calculate the maximal Lyapunov exponent, the generalized entropies, the asymptotic distance between nearby trajectories and the fractal dimensions for a finite two dimensional system at different initial excitation energies. We show that…

chao-dyn · 物理学 2007-05-23 C. O. Dorso , A. Bonasera

Given a sample of independent and identically distributed random variables, a novel nonparametric maximum entropy method is presented to estimate the underlying continuous univariate probability density function (pdf). Estimates are found…

概率论 · 数学 2016-06-30 Jenny Farmer , Donald J. Jacobs

The fractal or Hausdorff dimension is a measure of roughness (or smoothness) for time series and spatial data. The graph of a smooth, differentiable surface indexed in $\mathbb{R}^d$ has topological and fractal dimension $d$. If the surface…

统计方法学 · 统计学 2015-03-17 Tilmann Gneiting , Hana Ševčíková , Donald B. Percival

While the universe becomes more and more homogeneous at large scales, statistical analysis of galaxy catalogs have revealed a fractal structure at small-scales (\lambda < 100 h^{-1} Mpc), with a fractal dimension D=1.5-2 (Sylos Labini et al…

天体物理学 · 物理学 2010-11-30 H. J. de Vega , N. Sánchez , F. Combes

Using a suite of self-similar cosmological simulations, we measure the probability distribution functions (PDFs) of real-space density, redshift-space density, and their geometric mean. We find that the real-space density PDF is…

宇宙学与河外天体物理 · 物理学 2022-04-27 Huanqing Chen , Nickolay Y. Gnedin , Philip Mansfield

Dimension theory lies at the heart of fractal geometry and concerns the rigorous quantification of how large a subset of a metric space is. There are many notions of dimension to consider, and part of the richness of the subject is in…

度量几何 · 数学 2019-09-20 Jonathan M. Fraser

Fractal dimensions can be used to characterize the clustering and lacunarities in density distributions. We use generalized fractal dimensions to study the neutral hydrogen distribution (HI) during the epoch of reionization. Using a…

宇宙学与河外天体物理 · 物理学 2017-01-18 Bidisha Bandyopadhyay , T. Roy Choudhury , T. R. Seshadri

We introduce notions of dimension of an infinite group, or more generally, a metric space, defined using percolation. Roughly speaking, the percolation dimension $pdim(G)$ of a group $G$ is the fastest rate of decay of a symmetric…

概率论 · 数学 2024-04-29 Agelos Georgakopoulos

Most entropy measures depend on the spread of the probability distribution over the sample space $\mathcal{X}$, and the maximum entropy achievable scales proportionately with the sample space cardinality $|\mathcal{X}|$. For a finite…

机器学习 · 计算机科学 2023-05-25 Rohan Ghosh , Mehul Motani

We present a new method of estimating the dispersion of a distribution which is based on the surprising property of a function that measures information processing intensity. It turns out that this function has a maximum at its fixed point.…

数据分析、统计与概率 · 物理学 2015-06-19 Rober Jankowski , Marcin Makowski , Edward W. Piotrowski