Results 21 to 30 of about 5,452,708 (289)

Coalgebraic Representation Theory of Fractals

open access: yesElectronic Notes in Theoretical Computer Science, 2010
AbstractWe develop a representation theory in which a point of a fractal specified by metric means (by a variant of an iterated function system, (IFS) is represented by a suitable equivalence class of infinite streams of symbols. The framework is categorical: symbolic representatives carry a final coalgebra; an IFS-like metric specification of a ...
Hasuo, I.   +3 more
openaire   +3 more sources

A Finite Element Approach to Modelling Fractal Ultrasonic Transducers [PDF]

open access: yes, 2014
Piezoelectric ultrasonic transducers usually employ composite structures to improve their transmission and reception sensitivities. The geometry of the composite is regular with one dominant length scale and, since these are resonant devices, this ...
Mulholland, Anthony, Algehyne, Ebrahem
core   +4 more sources

Counterexamples in theory of fractal dimension for fractal structures [PDF]

open access: yesChaos, Solitons & Fractals, 2016
Fractal dimension constitutes the main tool to test for fractal patterns in Euclidean contexts. For this purpose, it is always used the box dimension, since it is easy to calculate, though the Hausdorff dimension, which is the oldest and also the most accurate fractal dimension, presents the best analytical properties.
M. Fernández-Martínez   +2 more
openaire   +2 more sources

Interval estimation for contact stiffness of bolted joint with uncertain parameters

open access: yesAdvances in Mechanical Engineering, 2019
Bolted joints are elements used to create resistant assemblies in the mechanical system, whose overall performance is greatly affected by joints’ contact stiffness. Most of the researches on contact stiffness are based on certainty theory whereas in real
Yongsheng Zhao   +4 more
doaj   +1 more source

Feature extraction and identification of gas–liquid two-phase flow based on fractal theory

open access: yesSystems Science & Control Engineering, 2021
Due to the gas–liquid two-phase flow system with nonlinear characteristics, the fractal theory has a significant impact on nonlinear analysis, so the paper proposes applying the fractal theory to characterize the fractal characteristics of two-phase flow.
Chunling Fan   +4 more
doaj   +1 more source

A commutative noncommutative fractal geometry [PDF]

open access: yes, 2010
In this thesis examples of spectral triples, which represent fractal sets, are examined and new insights into their noncommutative geometries are obtained.
Samuel, Tony; id_orcid   +6 more
core   +1 more source

A New Digital Signature Scheme Based on Mandelbrot and Julia Fractal Sets. [PDF]

open access: yes, 2007
This paper describes a new cryptographic digital signature scheme based on Mandelbrot and Julia fractal sets. Having fractal based digital signature scheme is possible due to the strong connection between the Mandelbrot and Julia fractal sets.
Alia, Mohammad Ahmad, Samsudin, Azman
core   +1 more source

Influence of surface topography on three-dimensional fractal model of sliding friction

open access: yesAIP Advances, 2017
The purpose of this paper is to establish a three-dimensional model of sliding friction and to study the influence of surface topography fractal parameters on the model.
Wujiu Pan   +4 more
doaj   +1 more source

Fractal Theory in Thin Films: Literature Review and Bibliometric Evidence on Applications and Trends

open access: yesFractal and Fractional, 2022
A bibliometric analysis of publications on fractal theory and thin films is presented in this article. Bibliographic information is extracted from the Web of Science digital database and the bibliographic mapping undertaken using VOSviewer software ...
Fredrick M. Mwema   +2 more
doaj   +1 more source

Review on Fractal Analysis of Porous Metal Materials

open access: yesJournal of Chemistry, 2015
Porous metal materials are multifunctional lightweight materials and have been used widely in industry. The structural and functional characters of porous metal materials depend on the pore structure which can be described effectively by the fractal ...
J. Z. Wang   +4 more
doaj   +1 more source

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