Search for dissertations about: "Inverse problem"

Showing result 1 - 5 of 255 swedish dissertations containing the words Inverse problem.

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

   Author : John Bondestam Malmberg; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; coefficient inverse problem; inverse scattering; Maxwell’s equations; approximate global convergence; finite element method; adaptivity; ; a posteriori error analysis;

   Abstract : 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. READ MORE

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

   Author : John Bondestam Malmberg; Göteborgs universitet; []
   Keywords : 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;

   Abstract : 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. READ MORE

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

   Author : Mats Gustafsson; Institutionen för elektro- och informationsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maxwell equations; inverse problem; Electronics; inverse scattering; wave splitting; Elektronik;

   Abstract : 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. READ MORE

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

   Author : Mikhail Popov; KTH; []
   Keywords : 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;

   Abstract : .... READ MORE

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

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

   Abstract : .... READ MORE