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A Higher order and stable method for the numerical integration of Random Differential Equations
(EMAp - Escola de Matemática Aplicada, 2014-11)
Over the last few years there has been a growing and renovated interest in the numerical study of Random Differential Equations (RDEs). On one hand it is motivated by the fact that RDEs have played an important role in the ...
Time integration of non-linear dynamic equations by means of a direct variational method
(Academic Press Ltd - Elsevier Science Ltd, 2002-07)
Non-linear dynamic problems governed by ordinary (ODE) or partial differential equations (PDE) are herein approached by means of an alternative methodology. A generalized solution named WEM by the authors and previously ...
Isogeometric boundary element methods for three dimensional static fracture and fatigue crack growth
(Elsevier, 2017)
We present a novel numerical method to simulate crack growth in 3D, directly from the Computer-Aided Design (CAD)
geometry of the component, without any mesh generation. The method is an isogeometric boundary element ...
A method for solving nonlinear differential equations: An application to λϕ4 model
(2015-01-01)
Recently, it has been great interest in the development of methods for solving nonlinear differential equations directly. Here, it is shown an algorithm based on Padé approximants for solving nonlinear partial differential ...
On the numerical stability and mass-lumping schemes for explicit enriched meshfree methods
(2012-02-24)
Meshfree methods (MMs) such as the element free Galerkin (EFG)method have gained popularity because of some advantages over other numerical methods such as the finite element method (FEM). A group of problems that have ...
Planewave Density Interpolation Methods for the EFIE on Simple and Composite Surfaces
(2021)
This article presents an extension of the recently introduced planewave density interpolation method to the electric-field integral equation (EFIE) for problems of scattering and radiation by perfect electric conducting ...
Proportional controllers: Direct method for stability analysis and MATLAB implementation
(Institute of Electrical and Electronics Engineers (IEEE), 2007-02-01)
In most cases, the cost of a control system increases based on its complexity. Proportional (P) controller is the simplest and most intuitive structure for the implementation of linear control systems. The difficulty to ...
Proportional controllers: Direct method for stability analysis and MATLAB implementation
(Institute of Electrical and Electronics Engineers (IEEE), 2007-02-01)
In most cases, the cost of a control system increases based on its complexity. Proportional (P) controller is the simplest and most intuitive structure for the implementation of linear control systems. The difficulty to ...
Comment on “Stark effect in neutral hydrogen by direct integration of the Hamiltonian in parabolic coordinates”
(American Physical Society, 2015-06)
We show that the resonances of the Stark effect in hydrogen reported by Fernández-Menchero and Summers [Phys. Rev. A 88, 022509 (2013)PLRAAN1050-294710.1103/PhysRevA.88.022509] are considerably less accurate than the number ...