Sökning: "wave equation"

Visar resultat 1 - 5 av 161 avhandlingar innehållade orden wave equation.

  1. 1. The Dirac Equation: Numerical and Asymptotic Analysis

    Författare :Hasan Almanasreh; Chalmers tekniska högskola Göteborgs universitet.; Chalmers University of Technology University of Gothenburg.; Göteborgs universitet.; Gothenburg University.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dirac operator; eigenvalue problem; finite element method; spurious eigenvalues; Petrov-Galerkin; cubic Hermite basis functions; stability parameter; meshfree method; $hp$-cloud; intrinsic enrichment; G-convergence; $ Gamma$-convergence; scattering theory; identification; wave operator; stationary approach;

    Sammanfattning : .... LÄS MER

  2. 2. Numerics of Elastic and Acoustic Wave Motion

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Kristoffer Virta; Uppsala universitet.; Uppsala universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; finite differences; stability; high order accuracy; elastic wave equation; acoustic wave equation; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Sammanfattning : The elastic wave equation describes the propagation of elastic disturbances produced by seismic events in the Earth or vibrations in plates and beams. The acoustic wave equation governs the propagation of sound. LÄS MER

  3. 3. High Order Symmetric Finite Difference Schemes for the Acoustic Wave Equation

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Abraham Zemui; Uppsala universitet.; Uppsala universitet.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; finite element method; mass lumping; high order; finite difference method; wave equation; Numerical Analysis; Numerisk analys;

    Sammanfattning : When someone speaks, or when a piano is played, sound waves are spread through the room. Physically the propagation of sound is governed by the acoustic wave equation. This thesis deals with the problem of finding solutions to this equation by numerical methods. LÄS MER

  4. 4. Aspects of Wave Interaction in Nonlinear Media

    Detta är en avhandling från Chalmers University of Technology

    Författare :Björn Hall; Chalmers tekniska högskola.; Chalmers University of Technology.; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; nonlinear Schrödinger equation; nonlinear guided waves; nonlinear wave interaction; Bose-Einstein condensation; collective dynamics; Gross-Pitaevskii equation; incoherent solitons; Wigner transform; partial incoherence; modulational instability;

    Sammanfattning : Selected aspects of various types of nonlinear wave interaction are investigated. These aspects are studied in terms of models described by Nonlinear Schrödinger equations, mainly analytically and numerically, but also experimentally. LÄS MER

  5. 5. Some numerical and analytical methods for equations of wave propagation and kinetic theory

    Detta är en avhandling från Karlstad : Karlstads universitet

    Författare :Eva Mossberg; Karlstads universitet.; Karlstads universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS; MATEMATIK; Matematik; Mathematics; wave propagation; finite difference metods high order methods; Landau-Fokker-Planck equation; Monte-Carlo simulations; Boltzmann equation; hard sphere model; eigenvalue problem;

    Sammanfattning : This thesis consists of two different parts, related to two different fields in mathematical physics: wave propagation and kinetic theory of gases. Various mathematical and computational problems for equations from these areas are treated. LÄS MER