Sökning: "Inverse problem"

Visar resultat 1 - 5 av 193 avhandlingar innehållade orden Inverse problem.

  1. 1. Efficient Adaptive Algorithms for an Electromagnetic Coefficient Inverse Problem

    Författare :John Bondestam Malmberg; Göteborgs universitet.; Gothenburg University.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; coefficient inverse problem; inverse scattering; Maxwell’s equations; approximate global convergence; finite element method; adaptivity; a posteriori error analysis;

    Sammanfattning : This thesis comprises five scientific papers, all of which are focusing on the inverse problem of reconstructing a dielectric permittivity which may vary in space inside a given domain. The data for the reconstruction consist of time-domain observations of the electric field, resulting from a single incident wave, on a part of the boundary of the domain under consideration. LÄS MER

  2. 2. A Two-stage Numerical Procedure for an Inverse Scattering Problem

    Detta är en avhandling från Göteborg : University of Gothenburg

    Författare :John Bondestam Malmberg; Göteborgs universitet.; Gothenburg University.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; coefficient inverse problem; inverse scattering; backscattering data; approximate global convergence; finite element method; adaptivity; a posteriori error analysis;

    Sammanfattning : In this thesis we study a numerical procedure for the solution of the inverse problem of reconstructing location, shape and material properties (in particular refractive indices) of scatterers located in a known background medium. The data consist of time-resolved backscattered radar signals from a single source position. LÄS MER

  3. 3. Wave Splitting in Direct and Inverse Scattering Problems

    Detta är en avhandling från P.O. Box 118 SE 221 00 Lund Sweden

    Författare :Mats Gustafsson; Lunds universitet.; Lund University.; [2000]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maxwell equations; inverse problem; Electronics; inverse scattering; wave splitting; Elektronik;

    Sammanfattning : The focus of this thesis is on the use of wave splitting in electromagnetic direct and inverse scattering problems. Wave splitting offers a decomposition of wave fields into appropriate input and output wave constituents. LÄS MER

  4. 4. Analytic and Numerical Methods for the Solution of Electromagnetic Inverse Source Problems

    Detta är en avhandling från Institutionen för teoretisk elektroteknik

    Författare :Mikhail Popov; KTH.; [2001]
    Nyckelord :Inverse problem; inverse source problem; explicit identification; data continuation; global optimization; optimization approach; simulated annealing; genetic algorithm; non-destructive testing; lightning; return stroke model; explicit inversion; biom;

    Sammanfattning : .... LÄS MER

  5. 5. Hybrid methods for inverse force estimation in structural dynamics

    Detta är en avhandling från Institutionen för farkostteknik

    Författare :Niklas Sehlstedt; KTH.; [2003]
    Nyckelord :inverse force estimation; dynamic boundary traction vector; hilbert space basis; modal methods; inverse problem;

    Sammanfattning : .... LÄS MER