Sökning: "Inverse problem"

Visar resultat 1 - 5 av 220 avhandlingar innehållade orden Inverse problem.

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

    Författare :John Bondestam Malmberg; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :; 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

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

    Författare :Mats Gustafsson; Institutionen för elektro- och informationsteknik; []
    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

    Författare :Mikhail Popov; KTH; []
    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

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

    Sammanfattning : .... LÄS MER