Search for dissertations about: "variational principles"
Showing result 1 - 5 of 8 swedish dissertations containing the words variational principles.
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1. Statistical energy analysis and variational principles for the prediction of sound transmission in multilayered structures
Abstract : Multilayered structures have many application in industry and society: they have peculiar properties and serve a variety of purposes, like structural support, thermal insulation, vibrational and acoustic isolation. This thesis concerns the prediction of sound transmission in multilayered structures. READ MORE
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2. Wave interactions by Hamiltonian methods
Abstract : This thesis is devoted to the description of fluids and gases from a Hamiltonian point of view. The method we apply is a development of the theory invented by Hamilton (1805-1865). The original formulation is restricted to a certain family of dynamical variables; the canonical variables. READ MORE
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3. Principles of regional covariance in brain structure
Abstract : The human brain varies between individuals in both shape and size. These variations are not unique for each brain region. This causes grey matter density between regions to covary, a phenomenon known as “structural brain covariance”. READ MORE
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4. Slot Array Antennas at V-band based on Inverted Microstrip Gap Waveguide
Abstract : Recently, gap waveguide technology is introduced as a proper guiding structure for millimeter-systems. The conception of gap waveguide technology can be modeled for theoretical analysis by two parallel plates, a top perfect electric conductor layer and a bottom perfect magnetic conductor layer. READ MORE
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5. Computational Atomic Structure: Applications to Astrophysics and Nuclear Structure
Abstract : This thesis deals with the modelling of atoms and ions. In heavy systems, where the effect of the nuclear size must be considered, a fully relativistic treatment based on the Dirac-Coulomb Hamiltonian is needed. READ MORE