Results 81 to 90 of about 544,469 (212)

Chebyshev collocation method for fractional Newell-Whitehead-Segel equation

open access: yesAlexandria Engineering Journal
In this paper, a collocation approach for the fractional Newell-Whitehead-Segel equation is described. The finite difference method is used to discretized the time-fractional derivative, and Chebyshev functions are used for interpolating the spatial ...
E. Gebril, M.S. El-Azab, M. Sameeh
doaj   +1 more source

Adaptive ACMS: A robust localized Approximated Component Mode Synthesis Method

open access: yes, 2017
We consider finite element methods of multiscale type to approximate solutions for two-dimensional symmetric elliptic partial differential equations with heterogeneous $L^\infty$ coefficients.
Madureira, Alexandre L., Sarkis, Marcus
core  

Adaptive FE-BE coupling for strongly nonlinear transmission problems with friction II

open access: yes, 2013
This article discusses the well-posedness and error analysis of the coupling of finite and boundary elements for transmission or contact problems in nonlinear elasticity.
Gimperlein, Heiko, Stephan, Ernst P.
core  

Hyperparameter estimation for uncertainty quantification in mesoscale carbon dioxide inversions

open access: yesTellus: Series B, Chemical and Physical Meteorology, 2013
Uncertainty quantification is critical in the inversion of CO2 surface fluxes from atmospheric concentration measurements. Here, we estimate the main hyperparameters of the error covariance matrices for a priori fluxes and CO2 concentrations, that is ...
Lin Wu   +4 more
doaj   +1 more source

Understanding Statistical Testing

open access: yesSAGE Open, 2015
Statistical hypothesis testing is common in research, but a conventional understanding sometimes leads to mistaken application and misinterpretation.
Peter J. Veazie
doaj   +1 more source

On the convergence rate of a difference solution of the Poisson equation with fully nonlocal constraints

open access: yesNonlinear Analysis, 2014
We consider the Poisson equation in a rectangular domain. Instead of the classical specification of boundary data, we impose an integral constraints on the inner stripe adjacent to boundary having the width ξ.
Givi Berikelashvilia, Nodar Khomeriki
doaj   +1 more source

Disturbance Observer-Based Dynamic Surface Control for Servomechanisms with Prescribed Tracking Performance

open access: yesMathematics
The critical design challenge for a class of servomechanisms is to reject unknown dynamics (including internal uncertainties and external disturbances) and achieve the prescribed performance of the tracking error.
Xingfa Zhao   +4 more
doaj   +1 more source

GMM-based localization algorithm under NLOS conditions

open access: yesTongxin xuebao, 2014
Aiming at indoor node localizations of WSN,a node localization algorithm,where priori-knowledge is not necessary,was proposed.on basis of analyzing the error model,combined with Gaussian mixture model (GMM).By training the distance measurements ...
Wei CUI   +4 more
doaj   +2 more sources

A Priori Error Estimates for Mixed Finite Element Schemes for the Wave Equation

open access: yesSultan Qaboos University Journal for Science [SQUJS], 2015
A family of implicit-in-time mixed finite element schemes is presented for the numerical approximation of the acoustic wave equation. The mixed space discretization is based on the displacement form of the wave equation and the time-stepping method employs a three-level one-parameter scheme.
openaire   +2 more sources

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