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Dissertations / Theses on the topic 'Thomas equation'

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Published: 5 June 2025

Last updated: 24 June 2025

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1

Hübner, Thomas [Verfasser]. "A monolithic, off-lattice approach to the discrete Boltzmann equation with fast and accurate numerical methods / Thomas Hübner." Dortmund : Universitätsbibliothek Technische Universität Dortmund, 2011. http://d-nb.info/1011570777/34.

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2

Oppenländer, Christian [Verfasser], and Thomas [Akademischer Betreuer] Niehaus. "Time-dependent density functional tight binding combined with the Liouville-von Neumann equation applied to AC transport in molecular electronics / Christian Oppenländer. Betreuer: Thomas Niehaus." Regensburg : Universitätsbibliothek Regensburg, 2015. http://d-nb.info/1068055898/34.

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3

Rippl, Thomas [Verfasser], Anja [Akademischer Betreuer] Sturm, Anita [Akademischer Betreuer] Winter, and Leonid [Akademischer Betreuer] Mytnik. "Pathwise Uniqueness of the Stochastic Heat Equation with Hölder continuous o diffusion coefficient and colored noise / Thomas Rippl. Gutachter: Anja Sturm ; Anita Winter ; Leonid Mytnik. Betreuer: Anja Sturm." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://d-nb.info/1044047674/34.

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4

Adrian, Simon [Verfasser], Dr Ing Thomas F. Eibert Prof Dr Francesco P. Andriulli [Akademischer Betreuer] Prof, Prof Dr Ralf [Gutachter] Hiptmair, Prof Dr Romanus [Gutachter] Dyczij-Edlinger, and Dr Ing Thomas F. Eibert Prof Dr Francesco P. Andriulli [Gutachter] Prof. "Rapidly Converging Boundary Integral Equation Solvers in Computational Electromagnetics / Simon Adrian ; Gutachter: Prof. Dr. Ralf Hiptmair, Prof. Dr. Romanus Dyczij-Edlinger, Prof. Dr. Francesco P. Andriulli Prof. Dr.-Ing. Thomas F. Eibert ; Betreuer: Prof. Dr. Francesco P. Andriulli Prof. Dr.-Ing. Thomas F. Eibert." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1155533984/34.

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5

Lambert, Flavien. "Approche sans orbitale des plasmas denses." Phd thesis, [Gif-sur-Yvette] : [CEA Saclay, Direction des systèmes d'information], 2007. http://catalogue.bnf.fr/ark:/12148/cb41172794t.

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6

Ozdemir, Sevilay. "Bose-einstein Condensation At Lower Dimensions." Master's thesis, METU, 2004. http://etd.lib.metu.edu/upload/755959/index.pdf.

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In this thesis, the properties of the Bose-Einstein condensation (BEC) in low dimensions are reviewed. Three dimensional weakly interacting Bose systems are examined by the variational method. The effects of both the attractive and the repulsive interatomic forces are studied. Thomas-Fermi approximation is applied to find the ground state energy and the chemical potential. The occurrence of the BEC in low dimensional systems, is studied for ideal gases confined by both harmonic and power-law potentials. The properties of BEC in highly anisotropic trap are investigated and the conditions for reduced dimensionality are derived.

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7

Brenner, Thomas Ulrich [Verfasser]. "Image Formation in Optical Coherence Tomography Simulated with Maxwell’s Equations / Thomas Ulrich Brenner." Ulm : Universität Ulm, 2021. http://d-nb.info/1236993799/34.

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8

Flaig, Thomas G. [Verfasser]. "Discretization strategies for optimal control problems with parabolic partial differential equations / Thomas G. Flaig." München : Verlag Dr. Hut, 2013. http://d-nb.info/103729176X/34.

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9

Lee, Sara [Verfasser], and Thomas [Akademischer Betreuer] Carraro. "Adaptive Multirate Method for Coupled Parabolic and Elliptic Equations / Sara Lee ; Betreuer: Thomas Carraro." Heidelberg : Universitätsbibliothek Heidelberg, 2016. http://d-nb.info/1180736559/34.

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10

Ullrich, Wolfram Christoph [Verfasser], Thomas [Akademischer Betreuer] Sattelmayer, Thomas [Gutachter] Sattelmayer, and Lars [Gutachter] Enghardt. "Combustion Noise Prediction with Linearized Navier-Stokes Equations and Spectral Sound Sources / Wolfram Christoph Ullrich ; Gutachter: Thomas Sattelmayer, Lars Enghardt ; Betreuer: Thomas Sattelmayer." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1201819946/34.

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11

Jankuhn, Thomas [Verfasser], Arnold [Akademischer Betreuer] Reusken, and Maxim [Akademischer Betreuer] Olshanskii. "Finite element methods for surface vector partial differential equations / Thomas Jankuhn ; Arnold Reusken, Maxim Olshanskii." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1240765762/34.

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12

Gikadi, Jannis [Verfasser], Thomas [Akademischer Betreuer] Sattelmayer, and Johannes [Akademischer Betreuer] Janicka. "Prediction of Acoustic Modes in Combustors using Linearized Navier-Stokes Equations in Frequency Space / Jannis Gikadi. Gutachter: Thomas Sattelmayer ; Johannes Janicka. Betreuer: Thomas Sattelmayer." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1049783050/34.

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13

Klaus, Tina [Verfasser], Thomas [Akademischer Betreuer] Müller-Gronbach, and Andreas [Akademischer Betreuer] Rößler. "Complexity Analysis of Quantizations of Multidimensional Stochastic Differential Equations / Tina Klaus ; Thomas Müller-Gronbach, Andreas Rößler." Passau : Universität Passau, 2020. http://d-nb.info/1203371586/34.

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14

Flaig, Thomas Gerhard [Verfasser], Thomas [Akademischer Betreuer] Apel, Fredi [Akademischer Betreuer] Tröltzsch, and Boris [Akademischer Betreuer] Vexler. "Discretization strategies for optimal control problems with parabolic partial differential equations / Thomas Gerhard Flaig. Universität der Bundeswehr München, Fakultät für Bauingenieurwesen und Umweltwissenschaften. Gutachter: Thomas Apel ; Fredi Tröltzsch ; Boris Vexler. Betreuer: Thomas Apel." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr, 2013. http://d-nb.info/1037118820/34.

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15

Flaig, Thomas G. [Verfasser], Thomas [Akademischer Betreuer] Apel, Fredi [Akademischer Betreuer] Tröltzsch, and Boris [Akademischer Betreuer] Vexler. "Discretization strategies for optimal control problems with parabolic partial differential equations / Thomas Gerhard Flaig. Universität der Bundeswehr München, Fakultät für Bauingenieurwesen und Umweltwissenschaften. Gutachter: Thomas Apel ; Fredi Tröltzsch ; Boris Vexler. Betreuer: Thomas Apel." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr, 2013. http://d-nb.info/1037118820/34.

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16

He, Daoyin [Verfasser], Ingo [Akademischer Betreuer] [Gutachter] Witt, Dorothea [Gutachter] Bahns, and Thomas [Gutachter] Schick. "Critical exponents for semilinear Tricomi-type equations / Daoyin He ; Gutachter: Ingo Witt, Dorothea Bahns, Thomas Schick ; Betreuer: Ingo Witt." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1120117704/34.

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17

Callies, Martin [Verfasser], Viktor [Akademischer Betreuer] Pidstrygach, and Thomas [Akademischer Betreuer] Schick. "Permuting actions, moment maps and the generalized Seiberg-Witten equations / Martin Callies. Betreuer: Viktor Pidstrygach. Gutachter: Viktor Pidstrygach ; Thomas Schick." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1097753050/34.

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18

Rösch, Thomas [Verfasser], and T. [Akademischer Betreuer] Arens. "Electromagnetic Wave Scattering at Biperiodic Surfaces: Variational Formulation, Boundary Integral Equations and High Order Solvers / Thomas Rösch ; Betreuer: T. Arens." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1117701867/34.

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19

Lilienthal, Martin [Verfasser], Thomas [Akademischer Betreuer] Weiland, and Herbert [Akademischer Betreuer] Egger. "Error Controlled hp-Adaptive Finite Element Methods for the Time-Dependent Maxwell Equations / Martin Lilienthal. Betreuer: Thomas Weiland ; Herbert Egger." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2015. http://d-nb.info/111190992X/34.

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20

Woyna, Irene [Verfasser], Thomas [Akademischer Betreuer] Weiland, and Irina [Akademischer Betreuer] Munteanu. "Wideband Impedance Boundary Conditions for FE/DG Methods for Solving Maxwell Equations in Time Domain / Irene Woyna. Betreuer: Thomas Weiland ; Irina Munteanu." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://d-nb.info/1110792905/34.

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21

Lathuilière, Bruno. "Méthode de décomposition de domaine pour les équations du transport simplifié en neutronique." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2010. http://tel.archives-ouvertes.fr/tel-00468154.

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Les calculs de réactivité constituent une brique fondamentale dans la simulation des coeurs des réacteurs nucléaires. Ceux-ci conduisent à la résolution de problèmes aux valeurs propres généralisées via l'algorithme de la puissance inverse. A chaque itération, on est amené à résoudre un système linéaire de manière approchée via un algorithme d'itérations imbriquées. Il est difficile de traiter les modélisations très fines avec le solveur développé à EDF, au sein de la plate-forme Cocagne, en raison de la consommation mémoire et du temps de calcul. Au cours de cette thèse, on étudie une méthode de décomposition de domaine de type Schur dual. Plusieurs placements de l'algorithme de décomposition de domaine au sein du système d'itérations imbriquées sont envisageables. Deux d'entre eux ont été implémentés et les résultats analysés. Le deuxième placement, utilisant les spécificités des éléments finis de Raviart-Thomas et de l'algorithme des directions alternées, conduit à des résultats très encourageants. Ces résultats permettent d'envisager l'industrialisation de la méthodologie associée.

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22

Hatzesberger, Simon [Verfasser], Thomas [Akademischer Betreuer] Müller-Gronbach, and Sotirios [Akademischer Betreuer] Sabanis. "Strongly Asymptotically Optimal Methods for the Pathwise Global Approximation of Stochastic Differential Equations with Coefficients of Super-linear Growth / Simon Hatzesberger ; Thomas Müller-Gronbach, Sotirios Sabanis." Passau : Universität Passau, 2020. http://d-nb.info/1213520320/34.

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23

Hepperger, Peter Thomas Verfasser], Claudia [Akademischer Betreuer] Klüppelberg, Rüdiger [Akademischer Betreuer] [Kiesel, and Fred Espen [Akademischer Betreuer] Benth. "Pricing and Hedging under High-Dimensional Jump-Diffusion Models using Partial Differential Equations / Peter Thomas Hepperger. Gutachter: Claudia Klüppelberg ; Rüdiger Kiesel ; Fred Espen Benth. Betreuer: Claudia Klüppelberg." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1013436199/34.

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24

Oliveira, Francisco Vieira de. "Singularidades de Equações Diferenciais Implícitas." Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/7377.

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Made available in DSpace on 2015-05-15T11:46:05Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 547480 bytes, checksum: 23748fbdacd76846a114baea058b21f6 (MD5) Previous issue date: 2013-05-27<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In this work we study implicit differential equations. Following the Thom tranversality theorem and the singularity theory we find an open and dense subset of this equation class that present only good singularity. This singularity are of six kind well folded saddle, well folded node, well folded focus, elliptical gather, hyperbolic gather. Davydov,in [8] showed the normal forms of a IDE in the case of well folded saddle, well folded node, well folded focus. In the case of gathered singularities, Davydov showed that the normal forms of IDE contains functional moduli. For a special class of implicit differential equation, the binary differential equation (BDE), we study the normal forms in the case in that the discriminant is a Morse function.<br>Neste trabalho estudamos singularidades de equações diferenciais implícitas. Usando o Teorema de Transversalidade de Thom e a teoria das singularidades encontramos um subconjunto aberto e denso desta classe de equações que apresentam singularidades boas. Estas singularidades são apenas de seis tipos dobra-sela, dobra-nó, dobra-foco, cúspide elíptica e cúspide hiperbólica. Davydov, em [8], mostrou as formas normais da EDI nos casos de dobra-sela, dobra-nó e dobra-foco. No caso de cúspides, Davydov mostrou que as formas normais da EDI apresentam parâmetros e funções arbitrárias. Para uma classe especial de equações diferenciais implícitas, as equações diferenciais binária (EDB), estudamos a forma normal nos casos em que o discriminante é uma função de Morse.

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25

Le, Hung Manh, and n/a. "Electronic Properties of Nanostructures from Hydrostatics and Hydrodynamics." Griffith University. School of Science, 1997. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070403.094305.

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The behaviour of electrons in nanostructures such as quantum wells is of interest for the design of new electronic and electro-optic devices, and also for exploration of basic many-body physics. This thesis develops and tests improved methods for describing such electronic behaviour. The system used for this work was the parabolic quantum well (PQW), an important special system which has recently attracted much experimental and theoretical attention. We firstly report self-consistent nonlinear groundstate solutions of the Poisson equation together with the Thomas-Fermi (TF) hydrostatic equations. In contrast to most previous solutions, all the electron density profiles were inhomogeneous and continuous. We also added a von Weizsacker term with and without the exchange/exchange-correlation to the above treatment, using a novel numerical approach allowing for wider electron gases than previously possible. We also report for the first time the effects of spatially varying effective mass and dielectric function in theories of this type. To investigate infrared response of these systems, we apply new hydrodynamic theories recently proposed by Dobson. By using this type of theory, we simultaneously satisfy the Harmonic Potential Theorem (extended generalized Kohn theorem) and obtain the correct 2D plasmon dispersion, as well as obtaining the correct spacing of standing plasmons. Other inhomogeneous hydrodynamic theories do not achieve this. We also showed analytically an exact solution for a plasmon mode at the Kohn frequency in addition to one found in the Harmonic Potential Theorem. An open hydrodynamic theory was then developed based on this type of mode. Numerical application of Kohn Frequency Theorem theory was shown and the results were compared with other existing hydrodynamic theories.

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26

Le, Hung. "Electronic Properties of Nanostructures from Hydrostatics and Hydrodynamics." Thesis, Griffith University, 1997. http://hdl.handle.net/10072/366817.

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The behaviour of electrons in nanostructures such as quantum wells is of interest for the design of new electronic and electro-optic devices, and also for exploration of basic many-body physics. This thesis develops and tests improved methods for describing such electronic behaviour. The system used for this work was the parabolic quantum well (PQW), an important special system which has recently attracted much experimental and theoretical attention. We firstly report self-consistent nonlinear groundstate solutions of the Poisson equation together with the Thomas-Fermi (TF) hydrostatic equations. In contrast to most previous solutions, all the electron density profiles were inhomogeneous and continuous. We also added a von Weizsacker term with and without the exchange/exchange-correlation to the above treatment, using a novel numerical approach allowing for wider electron gases than previously possible. We also report for the first time the effects of spatially varying effective mass and dielectric function in theories of this type. To investigate infrared response of these systems, we apply new hydrodynamic theories recently proposed by Dobson. By using this type of theory, we simultaneously satisfy the Harmonic Potential Theorem (extended generalized Kohn theorem) and obtain the correct 2D plasmon dispersion, as well as obtaining the correct spacing of standing plasmons. Other inhomogeneous hydrodynamic theories do not achieve this. We also showed analytically an exact solution for a plasmon mode at the Kohn frequency in addition to one found in the Harmonic Potential Theorem. An open hydrodynamic theory was then developed based on this type of mode. Numerical application of Kohn Frequency Theorem theory was shown and the results were compared with other existing hydrodynamic theories.<br>Thesis (PhD Doctorate)<br>Doctor of Philosophy (PhD)<br>School of Science<br>Science, Environment, Engineering and Technology<br>Full Text

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27

Hilger, Thomas [Verfasser], Burkhard [Akademischer Betreuer] Kämpfer, and Stefan [Akademischer Betreuer] Leupold. "Medium Modifications of Mesons : Chiral Symmetry Restoration, in-medium QCD Sum Rules for D and rho Mesons, and Bethe-Salpeter Equations / Thomas Hilger. Gutachter: Burkhard Kämpfer ; Stefan Leupold. Betreuer: Burkhard Kämpfer." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://d-nb.info/1067732659/34.

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28

Chang, Chia-Lun, and 張家倫. "Correlations between Foldy-Wouthuysen transformed Dirac equation and Thomas-Bargmann-Michel-Telegdi equation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/09619774740777728249.

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碩士<br>國立臺灣大學<br>物理研究所<br>99<br>The classical Hamiltonian of a point charged particle with intrinsic spin, which is composed of the relativistic orbit Hamiltonian and the spin Hamiltonian. This spin Hamiltonian can be derived from the Thomas-Bargmann-Michel-Telegdi equation. In our thesis, we will prove that the classical Hamiltonian in which the gyromagnetic ratio equals 2 is in agreement with the low-energy limit of the Dirac equation, the relativistic quantum theory for a spin-1/2 charged particle. For this purpose, we apply the Foldy-Wouthuysen transformation to the Dirac Hamiltonian under the assumptions of the static and homogeneous electromagnetic fields. Furthermore, in order to maintain such a correspondence in arbitrary gyromagnetic ratio cases, we perform the F-W transformation to the Dirac-Pauli Hamiltonian, which is the Dirac Hamiltonian plus the anomalous magnetic dipole moment Hamiltonian. Up to the twelfth-order of F-W transformed Dirac and Dirac-Pauli Hamiltonian, the calculation results are in accord with the corresponding classical Hamiltonians.

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29

Forkmann, Thomas [Verfasser]. "New perspectives for the assessment of depression : development of an item bank and a screening instrument applying Rasch analysis and structural equation modelling / vorgelegt von Thomas Forkmann." 2008. http://d-nb.info/992770483/34.

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30

LIU, ZHE-MING, and 劉哲明. "The solutions of the generalized Thomas-Fermi nonlinear ordinary differential equations." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/57073573809636062682.

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31

Gauss, Thomas [Verfasser]. "Floquet theory for a class of periodic evolution equations in an Lp-setting / von Thomas Gauss." 2010. http://d-nb.info/1004981139/34.

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32

Lorenz, Thomas [Verfasser]. "First-order geometric evolutions and semilinear evolution equations : a common mutational approach / vorgelegt von Thomas Lorenz." 2004. http://d-nb.info/972390995/34.

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33

Kozák, Michal. "Bifurkace v matematických modelech v biologii." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-321003.

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Stationary, spatially inhomogenous solutions of reaction-diffusion systems are studied in this thesis. These systems appears in biological models based on a Tu- ring's idea of a diffusion driven instability. In the connection, a global behaviour of bifurcation branches of these stationary solutions is analyzed. The thesis in- sists on theory of differential equations and on (particularly topological) methods of nonlinear analysis. The existence, as well as non-compatness in one-dimensional space, of a bifurcation branch of general reaction-diffusion system leading to Tu- ring's efekt is proved. Further, a priori estimates of Thomas model are derived. The results tend to theorem, that forall diffusion coefficient from the preestab- lished set there exists at least one stacionary, spacially nontrivial solution of Tho- mas model.

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