Results 11 to 20 of about 331,306 (335)

On the Fractal Measures and Dimensions of Image Measures on a Class of Moran Sets

open access: yesMathematics, 2023
In this work, we focus on the centered Hausdorff measure, the packing measure, and the Hewitt–Stromberg measure that determines the modified lower box dimension Moran fractal sets. The equivalence of these measures for a class of Moran is shown by having
Najmeddine Attia, Bilel Selmi
doaj   +1 more source

On the vectorial multifractal analysis in a metric space

open access: yesAIMS Mathematics, 2023
Multifractal analysis is typically used to describe objects possessing some type of scale invariance. During the last few decades, multifractal analysis has shown results of outstanding significance in theory and applications. In particular, it is widely
Najmeddine Attia, Amal Mahjoub
doaj   +1 more source

Packing dimensions of basins generated by distributions on a finite alphabet

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2021
We consider a space of infinite signals composed of letters from a finite alphabet. Each signal generates a sequence of empirical measures on the alphabet and the limit set corresponding to this sequence.
Victor I. Bakhtin, Bruno Sadok
doaj   +1 more source

A study on calculation of friction coefficient and packing stress using static diagnosis test for a balanced globe valve in nuclear power plants

open access: yesNuclear Engineering and Technology, 2021
A valve assembly used in nuclear power plants must be qualified and supervised. New technical standards such as ASME QME-1 2007 particularly require detailed qualification using experiment and analysis.
Jaehyung Kim, Taemook Lim, Ho-Geun Ryu
doaj   +1 more source

Different types of multifractal measures in separable metric spaces and their applications

open access: yesAIMS Mathematics, 2023
The properties of various fractal and multifractal measures and dimensions have been under extensive study in the real-line and higher-dimensional Euclidean spaces.
Najmeddine Attia, Bilel Selmi
doaj   +1 more source

Too packed to change: side-chain packing and site-specific substitution rates in protein evolution [PDF]

open access: yesPeerJ, 2015
In protein evolution, due to functional and biophysical constraints, the rates of amino acid substitution differ from site to site. Among the best predictors of site-specific rates are solvent accessibility and packing density.
María Laura Marcos, Julian Echave
doaj   +2 more sources

On the general relationship between plant height and aboveground biomass of vegetation stands in contrasted ecosystems.

open access: yesPLoS ONE, 2021
Ecological communities are unique assemblages of species that coexist in consequence of multi-causal processes that have proven hard to generalize. One possible exception are processes that control the biomass packing of vegetation stands; the amount of ...
Raphaël Proulx
doaj   +1 more source

Comparison of side-chain dispersion in protein structures determined by cryo-EM and X-ray crystallography

open access: yesIUCrJ, 2022
An evaluation of systematic differences in local structure and conformation in the interior of protein tertiary structures determined by crystallography and by cryo-electron microscopy (cryo-EM) is reported.
Ashraya Ravikumar   +3 more
doaj   +1 more source

Using ultra-short pulses to determine particle size and density distributions [PDF]

open access: yes, 2007
We analyze the time dependent response of strongly scattering media (SSM) to ultra-short pulses of light. A random walk technique is used to model the optical scattering of ultra-short pulses of light propagating through media with random shapes and ...
Boller, Klaus. -J.   +2 more
core   +3 more sources

An Effective Discrete Grey Wolf Optimization Algorithm for Solving the Packing Problem

open access: yesIEEE Access, 2020
This article proposes a novel discrete grey wolf optimization for the packing problem, called the two-dimensional strip packing (2DSP) problem without guillotine constraint.
Peng Wang, Yunqing Rao, Qiang Luo
doaj   +1 more source

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