Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Variationsrechnung"”.
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Kontaktprobleme in der nichtlinearen Elastizitätstheorie
… Elastizitätstheorie mit Mitteln der Variationsrechnung behandelt. Dabei liegt das Hauptaugenmerk auf der Untersuchung des Selbstkontakts eines nichtlinear elastischen Körpers. Unter Verwendung einer geeigneten Lagrangeschen Multiplikatorenregel wird eine notwendige Bedingung für …
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Vektorielle Mehrniveaupassung. Anwendungen in der Bildsegmentierung
… zum verbreiteten Ansatz, Bilder mit Methoden der Variationsrechnung über einen Energieterm zu segmentieren. Beiden Verfahren ist gemeinsam, daß sie versuchen, das gegebene Bild durch stückweise stetige Funktionen zu approximieren. Die maximalen Teilmengen des Definitionsbereichs, auf denen die …
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Variational problems on supermanifolds
In this thesis, we discuss the formulation of variational problems on supermanifolds. Supermanifolds incorporate bosonic as well as fermionic degrees of freedom. Fermionic fields take values in the odd part of an appropriate Grassmann algebra and are thus showing an anticommutative behaviour. …
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A variational formulation of a floating body
In this thesis we consider a two-dimensional motion with a floating body from a variational point of view. We consider an irrotational flow of an inviscid, homogeneous and incompressible liquid of finite depth acted on by gravity and surface tension. We look for 2R-periodic waves which propagate …
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Non-parametric hypersurfaces of prescribed mean curvature in H n x R
In the present thesis, we consider hypersurfaces of prescribed mean curvature and prescribed boundary values in the product manifold $HypimesR$ from a variational point of view. Here, $Hyp$ denotes the conformal ball model of the hyperbolic n-space. We focus mainly on non-parametric hypersurfaces …
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Shape optimization of a floating body
In the present thesis we consider a variational formulation of a floating body in a perfect fluid. In particular, we study the case of a stationary two-dimensional potential flow and thus we are able to replace the velocity potential by its harmonic conjugate which is called the stream function. …
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Variational methods in nonsmooth analysis and quasilinear equations
A natural generalization of the classical theory of critical points is the concept of the theory of critical points for continuous functionals. A fundamental tool in this concept is the weak slope. We introduce it in the first chapter and compare it with other slopes of the literature. We show that …