Results 21 to 30 of about 5,148,982 (304)

Roller nanoimprint lithography for low-cost nanoscale random lattice diffractive optical elements

open access: yesAIP Advances, 2020
In this paper, effective fabrication of high-resolution diffractive optical elements on a polymer substrate is demonstrated using roller nanoimprint lithography.
Man Zhang   +5 more
doaj   +1 more source

Numerical Modeling of 3D Slopes with Weak Zones by Random Field and Finite Elements

open access: yesApplied Sciences, 2021
This work investigates an analysis method for the stability of a three-dimensional (3D) slope with weak zones considering spatial variability on the basis of two-phase random media and the finite element method.
Yu-Xiang Xia   +3 more
doaj   +1 more source

Multi-element stochastic reduced basis methods [PDF]

open access: yes, 2007
This paper presents mutli-element Stochastic Reduced Basis Methods (ME-SRBMs) for solving linear stochastic partial differential equations. In ME-SRBMs, the domain of definition of the random inputs is decomposed into smaller subdomains or random ...
Surya Mohan, P.   +5 more
core   +1 more source

Several Basic Elements of Entropic Statistics

open access: yesEntropy, 2023
Inspired by the development in modern data science, a shift is increasingly visible in the foundation of statistical inference, away from a real space, where random variables reside, toward a nonmetrized and nonordinal alphabet, where more general random
Zhiyi Zhang
doaj   +1 more source

Minimal and random generation of permutation and matrix groups [PDF]

open access: yes, 2012
We prove explicit bounds on the numbers of elements needed to generate various types of finite permutation groups and finite completely reducible matrix groups, and present examples to show that they are sharp in all cases.
Derek F. Holt   +6 more
core   +1 more source

Bridges for Pedestrians with Random Parameters using the Stochastic Finite Elements Analysis

open access: yesInternational Journal of Applied Mechanics and Engineering, 2017
The main aim of this paper is to present a Stochastic Finite Element Method analysis with reference to principal design parameters of bridges for pedestrians: eigenfrequency and deflection of bridge span.
J. Szafran, M. Kamiński
doaj   +1 more source

Towards gigantic RVE sizes for 3D stochastic fibrous networks [PDF]

open access: yes, 2014
The size of representative volume element (RVE) for 3D stochastic fibrous media is investigated. A statistical RVE size determination method is applied to a specific model of random microstructure: Poisson fibers. The definition of RVE size is related to
FOREST, Samuel   +2 more
core   +1 more source

Stochastic finite elements: Where is the physics? [PDF]

open access: yesTheoretical and Applied Mechanics, 2011
The micromechanics based on the Hill-Mandel condition indicates that the majority of stochastic finite element methods hinge on random field (RF) models of material properties (such as Hooke’s law) having no physical content, or even at odds with ...
Ostoja-Starzewski Martin
doaj   +1 more source

Generating Random Elements in Finite Groups [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2008
Let $G$ be a finite group of order $g$. A probability distribution $Z$ on $G\ $is called $\varepsilon$-uniform if $\left\vert Z(x)-1/g\right\vert \leq\varepsilon/g$ for each $x\in G$. If $x_{1},x_{2},\dots,x_{m}$ is a list of elements of $G$, then the random cube $Z_{m}:=Cube(x_{1},\dots,x_{m}) $ is the probability distribution where $Z_{m}(y)$ is ...
openaire   +3 more sources

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