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Showing 1 to 20 of 567 for “"Parabolic"”.
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Parabolic Springer resolution
… a reductive group over a field k = k. Let P be a parabolic subgroup. We construct a functor Groupoid ... is a connected space, which induces an action of generalizing a classical result. It is also a part of a study of natural equivalences between ... for P, Q associated parabolic subgroups.
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Pseudo-Parabolic Partial Differential Equations
Made available in DSpace on 2014-12-09T22:17:47Z (GMT). No. of bitstreams: 1 6901446.pdf: 2134615 bytes, checksum: 8e168dabbcae5bb09dbcc713a68e9920 (MD5) Previous issue date: 1968
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Splitting schemes for nonlinear parabolic problems
… of splitting schemes when applied to nonlinear parabolic problems. These numerical methods are frequently used when a problem has a natural decomposition into two or more parts, as the computational cost may then be significantly decreased compared to other methods. There are two prominent …
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On Elastic Buckling of Parabolic Arches
Made available in DSpace on 2014-12-04T23:10:53Z (GMT). No. of bitstreams: 1 0013568.pdf: 1124706 bytes, checksum: 4c42722dd83208f3de9adcc7d73356ec (MD5) Previous issue date: 1955
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Parabolic equations without a minimum principle
In this thesis, we consider several parabolic equations for which the minimum principle fails. We first consider a two-point boundary value problem for a one dimensional diffusion equation. We show the uniqueness and existence of the solution for initial data, which may not be continuous at two …
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Imaging with parabolic refractive X-ray lenses
… to be considered in the process of fabricating parabolic refractive x-ray lenses, especially the choice of the right materials. The optical properties of these lenses and their applications are also discussed there. In chapter 5 imaging by means of parabolic refractive x-ray lenses using …
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Control-Oriented Model Reduction for Parabolic Systems
In der vorliegenden Arbeit werden effiziente Implementierungen von Modellreduktionsverfahren für lineare, zeitinvariante Kontrollsysteme entwickelt. Modellreduktion spielt eine wichtige Rolle in der Simulation, Kontrolle und Optimierung von komplexen, dynamischen Systemen, wie sie bei der …
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Similarity solutions of stochastic nonlinear parabolic equations
… solutions of the nonlinear stochastic complex parabolic equation in the presence of two profiles. Specifically, the randomly modulated linear potential and the randomly perturbed quadratic focusing medium. In the former, a class of solutions is shown to admit an exact statistical description in …
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An initial-boundary value problem for parabolic systems
Not available
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Hard x-ray microanalysis with parabolic refractive lenses
… microanalysis in the hard X-ray range based on parabolic refractive lenses. Obviously, refractive lenses for visible light are most successful. But the weak refraction and strong absorption of hard X-rays in matter make the realization of refractive lenses difficult. Highly brilliant X-ray …
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Coefficient recovery in parabolic initial boundary value problems
… spatially dependent coefficients in linear, parabolic, partial differential equations with specified initial and boundary conditions. We primarily explore the recovery of the diffusivity coefficient in the heat equation using a very limited amount of data on a portion of the spatial boundary. …
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Regularity results for some elliptic and parabolic problems
… partial differential equations of elliptic and parabolic type, and it collects some results obtained during the last three years under the supervision of Prof. Ugo Gianazza The first part concernes the study of singular porous medium type equations: we start proving H\"older regularity for …
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Self Adaptive Methods for Parabolic Partial Differential Equations
In many applications, the solutions to important partial differential equations are characterized by a sharp active region of transition (such as wave fronts or areas of rapid diffusion) surrounded by relatively calm stable regions. The numerical approximation to such a solution is based on a mesh …
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Numerical Solution of Pseudo-Parabolic Partial Differential Equations
Made available in DSpace on 2014-12-11T18:23:53Z (GMT). No. of bitstreams: 1 7309932.pdf: 4066155 bytes, checksum: 03b9377b3bdeb8ecad3cfe772c7ba844 (MD5) Previous issue date: 1972
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Parabolic trough solar collectors : design for increasing efficiency
Parabolic trough collectors are a low cost implementation of concentrated solar power technology that focuses incident sunlight onto a tube filled with a heat transfer fluid. The efficiency and cost of the parabolic trough collector designs is influenced by structural stiffness, choice of …
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Equivariant Global Hopf Bifurcation in Abstract Nonlinear Parabolic Equations
… global symmetric Hopf bifurcation in abstract parabolic systems by means of the twisted equivariant degree.
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Modeling and Experimental Investigation of Parabolic Trough Solar Collector
… model is applied to study the performance of a parabolic trough solar collector (PTSC). The proposed model consists of three parts. The first part is a solar radiation model. In this section, the amount of solar radiation incident upon Earth is estimated using equations and relationships between …
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Controllability of quasilinear parabolic equations and Ladyzhenskaya-Boussinesq models
Neste presente trabalho, estudamos diferentes tipos de controle em dois modelos interes- santes, tanto teóricos quanto aplicados. No capítulo 2, estudaremos a existência de equilíbrios de Nash para a equação do calor com coeficiente de viscosidade dependendo do estado; também realizamos a parte …
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