Results 21 to 30 of about 91 (67)

The Partition of Unity Method for the Elastically Supported Beam

open access: yes, 1998
The partition of unity method (PUM) is used to solve the Timoshenko beam with elastic support. Some important features of this new method are addressed, but the main concern is to overcome locking and boundary layer.
Ivo Babuska, Zhimin Zhang
core   +1 more source

A robust fitted numerical method for singularly perturbed turning point problems whose solution exhibits an interior layer

open access: yes, 2020
In this paper we considerer singularly perturbed convection-diffusion-reaction problems with a turning point whose solution exhibits an interior layer. We establish bounds on the solution to these problems and their derivatives.
Patidar, Kailash C.   +2 more
core  

Stiff Oscillatory Systems, Delta Jumps and White Noise

open access: yes, 2001
Two model problems for stiff oscillatory systems are introduced. Both comprise a linear superposition of N AE 1 harmonic oscillators used as a forcing term for a scalar ODE.
E. Suli, Cano Stuart, B. Cano
core  

A Residual-Certified Product-Integration Method for Nonlinear Caputo–Volterra Equations

open access: yes
We study an implicit product-integration scheme for nonlinear Caputo initial-value problems written as weakly singular Volterra equations. The Abel kernel is integrated exactly against a piecewise-linear interpolant of the nonlinear term, producing a ...
Thokchom Chhatrajit Singh
core   +1 more source

Analysis of membrane locking in hp FEM for a cylindrical shell

open access: yes, 2007
In this paper we analyze the performance of the hp\GammaFinite Element Method for a cylindrical shell problem. Our theoretical investigations show that the hp approximation converges exponentially, provided that boundary layers stemming from the edge ...
A. M. Matache, C. Schwab, K. Gerdes
core  

An Algorithm For The Numerical Solution Of Differential Equations Of Fractional Order

open access: yes, 1997
. Differential equations involving derivatives of non-integer order have shown to be adequate models for various physical phenomena in areas like damping laws, diffusion processes, etc.
Kai Diethelm
core  

Exponential Integrators For Quantum-Classical Molecular Dynamics

open access: yes, 1999
. We study time integration methods for equations of mixed quantum-classical molecular dynamics in which Newtonian equations of motion and Schrodinger equations are nonlinearly coupled. Such systems exhibit different time scales in the classical and the
Marlis Hochbruck, Christian Lubich
core  

On Taylor model based integration of ODEs

open access: yes, 2008
. Interval methods for verified integration of initial value problems (IVPs) for ODEs have been used for more than 40 years. For many classes of IVPs, these methods are able to compute guaranteed error bounds for the flow of an ODE, where traditional ...
M. Neher, K. R. Jackson, N. S. Nedialkov
core  

Low-rank Parareal: a low-rank parallel-in-time integrator. [PDF]

open access: yesBIT Numer Math, 2023
Carrel B, Gander MJ, Vandereycken B.
europepmc   +1 more source

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