Sökning: "hybrid methods"

Visar resultat 1 - 5 av 360 avhandlingar innehållade orden hybrid methods.

  1. 1. Hybrid Methods for Unsteady Fluid Flow Problems in Complex Geometries

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Jing Gong; Jan Nordström; Gunilla Efraimsson; Mark H. Carpenter; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hybrid methods; finite difference methods; finite volume methods; coupling procedure; stability; efficiency; artificial dissipation; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Sammanfattning : In this thesis, stable and efficient hybrid methods which combine high order finite difference methods and unstructured finite volume methods for time-dependent initial boundary value problems have been developed. The hybrid methods make it possible to combine the efficiency of the finite difference method and the flexibility of the finite volume method. LÄS MER

  2. 2. Hybrid Methods for Unsteady Fluid Flow Problems in Complex Geometries

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Jing Gong; Jan Nordström; Gunilla Efraimsson; Mark H. Carpenter; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hybrid methods; finite difference methods; finite volume methods; coupling procedure; stability; efficiency; artificial dissipation; MATHEMATICS Applied mathematics Numerical analysis; MATEMATIK Tillämpad matematik Numerisk analys; Scientific Computing; Beräkningsvetenskap;

    Sammanfattning : In this thesis, stable and efficient hybrid methods which combine high order finite difference methods and unstructured finite volume methods for time-dependent initial boundary value problems have been developed. The hybrid methods make it possible to combine the efficiency of the finite difference method and the flexibility of the finite volume method. LÄS MER

  3. 3. Hybrid Methods for Computational Electromagnetics in Frequency Domain

    Detta är en avhandling från Stockholm : Numerisk analys och datalogi (NADA), (tills m KTH)

    Författare :Stefan Hagdahl; Björn Engquist; Lars Pettersson; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Maxwell s equations; Geometrical Theory of Diffraction; Smooth Surface Diffraction; Boundary Element Method; Hybrid methods; Electromagnetic Scattering; MATHEMATICS Applied mathematics Numerical analysis; MATEMATIK Tillämpad matematik Numerisk analys;

    Sammanfattning : In this thesis we study hybrid numerical methods to be used in computational electromagnetics. The purpose is to address a wide frequency range relative to a given geometry. We also focus on efficient and robust numerical algorithms for computing the so called Smooth Surface Diffraction predicted by Geometrical Theory of Diffraction (GTD). LÄS MER

  4. 4. Hybrid methods for computational electromagnetics in the frequency domain

    Detta är en avhandling från Stockholm : Numerisk analys och datalogi

    Författare :Stefan Hagdahl; [2003]
    Nyckelord :Computational Electromagnetics; Hybrid Methods; Boundary Element Method; Geometrical Theory of Diffraction;

    Sammanfattning : In this thesis we study hybrid numerical methods to be usedin computational electromagnetics. We restrict the methods tospectral domain and scattering problems. The hybrids consist ofcombinations of Boundary Element Methods and Geometrical Theoryof Diffraction.In the thesis three hybrid methods will be presented. LÄS MER

  5. 5. Computational Methods for Hybrid Systems

    Detta är en avhandling från Department of Automatic Control, Lund Institute of Technology (LTH)

    Författare :Sven Hedlund; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis considers two different computational approaches for the analysis and synthesis of nonlinear systems. Each of these approaches is presented in a conference paper that describes parts of the theory and algorithms. Matlab commands implementing the algorithms have been developed and the manuals for these are included herein as well.. LÄS MER