Split Operator Technique
Mostrando 1-8 de 8 artigos, teses e dissertações.
-
1. TÃcnica Split Operator em Coordenadas Generalizadas. / Split Operator Technique in Generalized Coordinates
A mecÃnica quÃntica desempenha um papel fundamental na descriÃÃo e entendimento dos fenÃmenos naturais. De fato, os fenÃmenos que ocorrem em uma escala muito pequena (atÃmica ou sub-atÃmica) nÃo podem ser corretamente explicados fora do contexto da mecÃnica quÃntica. AlÃm disso, existem muitos fenÃmenos em escala macroscÃpica que revelam o comp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2010
-
2. Aplicação da técnica LOD em métodos no domínio do tempo e freqüência para modelagem de meios convencionais e metamateriais / Application of LOD technique in time and frequency domain methods for modelling conventional and metamaterial media
This work focuses on developing efficient numerical methods, both in time and frequency domains, for modeling wave propagation in structures that present conventional media and/or metamaterial media combinations, particularly the metamaterials where both permeability and permittivity are simultaneously negative. In some cases, the simulation of such structur
Publicado em: 2007
-
3. Transient chaos in an elasto-plastic beam with hardening
This contribution discusses the transient chaos on a pin-ended elasto-plastic beam with both kinematic and isotropic hardening. An iterative numerical procedure, based on the operator split technique, is developed. Numerical simulations show that transient chaos causes sensitivity on initial conditions, which imply that the system response may become unpredi
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-04
-
4. Chaotic motion of an elasto-plastic beam
The non-linear dynamics of a pin-ended elasto-plastic beam is discussed in this contribution. Ideal plasticity is in focus. Free and forced responses are considered. An iterative numerical procedure, based on the operator split technique, is developed. This work shows that jump phenomenon and sensitivity to initial conditions imply that the system response m
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-03
-
5. Chaos and Unpredictability in the Vibration of an Elasto-Plastic Beam
This contribution discusses the nonlinear dynamics of a pin-ended elasto-plastic beam with both kinematic and isotropic hardening. An iterative numerical procedure based on the operator split technique is developed in order to deal with the nonlinearities in the equations of motion. Free and forced responses for harmonic sinusoidal and square wave excitation
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
-
6. Simulação por elementos finitos da propagação escalar de feixes opticos
This thesis describes the computer modelling of a wide range of optical waveguides, for integrated optics applications. The modelling described here involves the numerical solution of suitable Maxwell wave equations, such as Helmholtz and Fresnel. Within this context, the Beam Propagation Method (BPM) ar marching methods, can be divided into two general kind
Publicado em: 1998
-
7. Estudo dos estados eletrônicos em sistemas quase-unidimensionais. / Study of electronic states in quasi-one-dimensional systems.
We have studied the electronic properties of two different quasi-one-dimensional systems solving self-consistently the Schrödinger and Poisson equation. The method we use to calculate the electronic levels is based on the solution of the time-dependent Schrödinger equation using the split-operator technique. In the first system we have studied, we present
Publicado em: 1997
-
8. Nonlinear response of vibrational excitons: Simulating the two-dimensional infrared spectrum of liquid water
A simulation formalism for the nonlinear response of vibrational excitons is presented and applied to the OH stretching vibrations of neat liquid H2O. The method employs numerical integration of the Schrödinger equation and allows explicit treatment of fluctuating transition frequencies, vibrational couplings, dipole moments, and the anharmonicities of all
American Institute of Physics.