E-Dissertationen: Auflistung E-Dissertationen nach Autor "Bartels, Sören"
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Adaptive numerical simulation of contact problems: Resolving local effects at the contact boundary in space and time
Walloth, Mirjam (2012-10-24)This thesis is concerned with the space discretization of static and the space and time discretization of dynamic contact problems. In particular, we derive a new efficient and reliable residual-type a posteriori error ... -
Anisotrope Verfahren in der Bildverarbeitung: Gradientenflüsse, Level-Sets und Narrow Bands: Gradientenflüsse, Level-Sets und Narrow Bands
Nemitz, Oliver (2008)<p>Isotrope Glättungs- und Restaurierungsverfahren neigen dazu, Isoflächen abzurunden. Für beispielsweise ecken- oder kantenerhaltendes Glätten oder Restaurieren sind sie nicht geeignet. Stattdessen können anisotrope ... -
Finite Element Methods for Geometric Problems
Raisch, Alexander Helmut-Wilhelm (2012-10-12)In the herewith presented work we numerically treat geometric partial differential equations using finite element methods. Problems of this type appear in many applications from physics, biology and engineering use.<br /> ... -
Joint methods in imaging based on diffuse image representations
Berkels, Benjamin (2010-08-31)This thesis deals with the application and the analysis of different variants of the Mumford-Shah model in the context of image processing. In this kind of models, a given function is approximated in a piecewise smooth or ... -
A Multigrid Method for the Efficient Numerical Solution of Optimization Problems Constrained by Partial Differential Equations
Engel, Martin (2009-05-25)We study the minimization of a quadratic functional subject to constraints given by a linear or semilinear elliptic partial differential equation with distributed control. Further, pointwise inequality constraints on the ... -
Numerical Methods for a Reduced Model in Thin-Film Micromagnetics
Drwenski, Jörg (2008)<p>We address the conformal finite element approximation to a reduced 2-d model arising in thin-film micromagnetics. The model was derived by DeSimone, Kohn, Müller, and Otto for a thin-film ferromagnetic element under an ...