Sökning: "spurious eigenvalues"

Hittade 3 avhandlingar innehållade orden spurious eigenvalues.

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

    Författare :Hasan Almanasreh; 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 : The thesis consists of three parts, although each part belongs to a specific subject area in mathematics, they are considered as subfields of the perturbation theory. The main objective of the presented work is the study of the Dirac operator; the first part concerns the treatment of the spurious eigenvalues in the computation of the discrete spectrum. LÄS MER

  2. 2. The Dirac Operator; From Numerics to the Theory of G-convergence

    Detta är en avhandling från Göteborg : University of Gothenburg

    Författare :Hasan Almanasreh; Göteborgs universitet.; Gothenburg University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Dirac operator; spuriousity; cubic Hermitian; stability parameter; G-convergence; ¡-convergence; spectral measure; quadratic form;

    Sammanfattning : We consider two main issues concerning the Dirac operator, the first is widelyknown as the appearance of spurious eigenvalues within the spectrum. The secondis the study of the asymptotic behavior of the eigenvalues for a family ofDirac operators with oscillatory potential added to the Coulomb-Dirac Hamiltonian. LÄS MER

  3. 3. The Texture-Transform An Operator for Texture Detection and Discrimination

    Detta är en avhandling från Stockholm : KTH

    Författare :Alireza Tavakoli Targhi; KTH.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TECHNOLOGY Information technology Computer science Computer science; TEKNIKVETENSKAP Informationsteknik Datavetenskap Datalogi;

    Sammanfattning : In this thesis we present contributions related to texture detection and discrimination to be used for analyzing real world images. Many computer vision applications can benefit from a fast and low dimensional texture descriptor. LÄS MER