Results 31 to 40 of about 4,530,915 (292)

Closed-form representation for equivalent electromagnetic parameters of irregular hexagonal honeycomb radar-absorbing materials

open access: yesAIP Advances, 2021
In this study, a new closed-form expression is developed to determine the equivalent electromagnetic parameters (permittivity and permeability) of biaxial anisotropic honeycomb radar-absorbing materials (RAMs).
Guanya Li   +8 more
doaj   +1 more source

Equivalent forms of multistep formulas [PDF]

open access: yesMathematics of Computation, 1979
For uniform meshes it is shown that any linear k-step formula can be formulated so that only k values need to be saved between steps. By saving additional m values it is possible to construct local polynomial approximations of degree k + m − 1 k + m - 1 , which can be used as predictor formulas ...
openaire   +1 more source

Boyer-Lindquist space-times and beyond: Meta-material analogues [PDF]

open access: yes, 2018
Physically reasonable stationary axisymmetric spacetimes can (under very mild technical conditions) be put into Boyer-Lindquist form. Unfortunately a metric presented in Boyer-Lindquist form is not well-adapted to the "quasi-Cartesian" meta-material ...
Schuster, Sebastian, Visser, Matt
core   +2 more sources

THE USAGE AND UNDERSTANDING OF ANGLICISMS BY BOSNIAN EFL USERS [PDF]

open access: yesHuman Research in Rehabilitation, 2023
This study aimed to explore the use of nominal and verbal Anglicisms by Bosnian high school students, the students’ familiarity with these Anglicisms and their attitudes towards them and it also aimed to see whether these factors vary with respect to ...
Amna Brdarevic-Celjo   +2 more
doaj   +1 more source

An extension of a multidimensional Hilbert-type inequality

open access: yesJournal of Inequalities and Applications, 2017
In this paper, by the use of weight coefficients, the transfer formula and the technique of real analysis, a new multidimensional Hilbert-type inequality with multi-parameters and a best possible constant factor is given, which is an extension of some ...
Jianhua Zhong, Bicheng Yang
doaj   +1 more source

A closed-form expression of effective permittivity with spherically symmetric function for honeycomb structure

open access: yesMaterials Research Express, 2021
A novel closed-form expression for predicting the equivalent electromagnetic parameters of the honeycomb structure is proposed. It is obtained by approximating the correlation terms in the derivation of the strong fluctuation theory with the integral of ...
Shilei Li   +4 more
doaj   +1 more source

Electron trapping at point defects on hydroxylated silica surfaces [PDF]

open access: yes, 2007
The origin of electron trapping and negative charging of hydroxylated silica surfaces is predicted based on accurate quantum-mechanical calculations. The calculated electron affinities of the two dominant neutral paramagnetic defects, the nonbridging ...
Giordano, L   +3 more
core   +1 more source

An equivalent form of Young's inequality with upper bound

open access: yes, 2008
Young's integral inequality is complemented with an upper bound to the remainder. The new inequality turns out to be equivalent to Young's inequality, and the cases in which the equality holds become particularly transparent in the new formulation ...
E. Minguzzi, E. Minguzzi
core   +2 more sources

On the form equivalence of L-forms

open access: yesTheoretical Computer Science, 1977
AbstractIn [5] the notion of an L form F defining a family Ld(F) of languages by means of X-interpretations has been introduced. Here X is one of a number of possible variations of the notion of interpretation originally used in [1] for grammar forms. In this paper it is shown that the questions whether Ld(F) = Ld(F1) for L forms F and F1 is decidable,
Maurer, H., Ottmann, Th., Salomaa, A.
openaire   +2 more sources

Lyapunov Equivalent Representation Form of Forced, Damped, Nonlinear, Two Degree-of-Freedom Systems

open access: yesApplied Sciences, 2018
The aim of this paper focuses on finding equivalent representation forms of forced, damped, two degree-of-freedom, nonlinear systems in the sense of Lyapunov by using a nonlinear transformation approach that provides decoupled, forced, damped, nonlinear ...
Alex Elías-Zúñiga   +3 more
doaj   +1 more source

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