Sökning: "coefficient inverse problem"
Visar resultat 1 - 5 av 10 avhandlingar innehållade orden coefficient inverse problem.
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
- Detta är en avhandling från Göteborg : University of Gothenburg
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
- Detta är en avhandling från Department of Mathematics, Lund University
Sammanfattning : We study aspects of scattering theory for the Schrödinger operator on the real line. In the first part of the thesis we consider potentials supported by a half-line, and we are interested in the inverse problem of reconstruction of the potential from the knowledge of values of the reflection coefficient at equidistributed points on the positive imaginary axis. LÄS MER
4. Computer-Assisted Proofs and Other Methods for Problems Regarding Nonlinear Differential EquationsDetta är en avhandling från Uppsala : Department of Mathematics
Sammanfattning : This PhD thesis treats some problems concerning nonlinear differential equations.In the first two papers computer-assisted proofs are used. The differential equations there are rewritten as fixed point problems, and the existence of solutions are proved. LÄS MER
- Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis
Sammanfattning : Robust preconditioners on block-triangular and block-factorized form for three types of linear systems of two-by-two block form are studied in this thesis.The first type of linear systems, which are dense, arise from a boundary element type of discretization of crack propagation problems. LÄS MER