Results 21 to 30 of about 957,336 (307)

Hausdorff Dimension and Topological Entropies of a Solenoid

open access: yesEntropy, 2020
The purpose of this paper is to elucidate the interrelations between three essentially different concepts: solenoids, topological entropy, and Hausdorff dimension.
Andrzej Biś, Agnieszka Namiecińska
doaj   +1 more source

Determining method of multiscale fractal dimension of red bed sandstone pores based on CT scanning

open access: yes地质科技通报, 2022
The distribution of pore structure inside rock has fractal characteristics in statistical sense, the determination of itsfractal dimension is of great significance to characterize the distribution law of pore structure quantitatively and reveal various ...
Zihan Zhang   +3 more
doaj   +1 more source

Experimental Study of the Multiple Fractalisation of Coal and Rock Failure Subjected to the Coupled Effects of Water, Temperature and Dynamic Loads

open access: yesApplied Sciences, 2023
The mechanical properties of water-rich coal and rock in a subzero environment are very different from those at room temperature, which causes many unexpected hazards for projects.
Tingxu Jin   +5 more
doaj   +1 more source

Pressure, Poincaré series and box dimension of the boundary [PDF]

open access: yesNonlinearity, 2021
AbstractIn this note we prove two related results. First, we show that for certain Markov interval maps with infinitely many branches the upper box dimension of the boundary can be read from the pressure of the geometric potential. Secondly, we prove that the box dimension of the set of iterates of a point in∂Hnwith respect to a parabolic subgroup of ...
Iommi, Godofredo, Velozo, Anibal
openaire   +5 more sources

Management and change in turbulent times: How do Russian small business managers perceive the development of their business environment?

open access: yesJournal of Business Economics and Management, 2008
This paper focuses on the management of small businesses in Russia. Despite the growing importance of the Russian small business sector, there are surprisingly few empirical studies focusing on this topic.
Jari Jumpponen   +2 more
doaj   +1 more source

Research on Influencing Factors of Box Dimension by Simulating Grain Storage Accumulation

open access: yesLiang you shipin ke-ji, 2022
In order to study the influencing factors of grain pile permeability, the influencing factors of fractal dimension closely related to permeability were explored based on fractal theory.
CHEN Xiao-yu, LU Xin
doaj   +1 more source

On distance sets, box-counting and Ahlfors-regular sets [PDF]

open access: yes, 2017
We obtain box-counting estimates for the pinned distance sets of (dense subsets of) planar discrete Ahlfors-regular sets of exponent $s>1$. As a corollary, we improve upon a recent result of Orponen, by showing that if $A$ is Ahlfors-regular of dimension
Shmerkin, Pablo
core   +3 more sources

The horizon problem for prevalent surfaces [PDF]

open access: yes, 2011
We investigate the box dimensions of the horizon of a fractal surface defined by a function $f \in C[0,1]^2 $. In particular we show that a prevalent surface satisfies the `horizon property', namely that the box dimension of the horizon is one less than ...
J. M. FRASER   +5 more
core   +4 more sources

An effective method to compute the box-counting dimension based on the mathematical definition and intervals

open access: yesResults in Engineering, 2020
Fractal dimension is an appropriate indicator to describe the complexity of a certain geometry, and box-counting analysis is proved to be an effective and appropriate method for fractal dimension estimation which is widely used.
Jiaxin Wu, Xin Jin, Shuo Mi, Jinbo Tang
doaj   +1 more source

Rokhlin dimension for actions of residually finite groups [PDF]

open access: yes, 2017
We introduce the concept of Rokhlin dimension for actions of residually finite groups on C*-algebras, extending previous notions of Rokhlin dimension for actions of finite groups and the integers, as introduced by Hirshberg, Winter and the third author ...
Szabo, Gabor   +2 more
core   +1 more source

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