Дисертації з теми "Maxwells wave equation"
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Azam, Md Ali. "Wave reflection from a lossy uniaxial media." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179854582.
Повний текст джерелаOlivares, Nicole Michelle. "Accuracy of Wave Speeds Computed from the DPG and HDG Methods for Electromagnetic and Acoustic Waves." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/2920.
Повний текст джерелаStrohm, Christian. "Circuit Simulation Including Full-Wave Maxwell's Equations." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22544.
Повний текст джерелаThis work is devoted to the simulation of electrical/electronic circuits incorporating electromagnetic devices. The focus is on different couplings of the circuit equations, modeled with the modified nodal analysis, and the electromagnetic devices with their refined model based on full-wave Maxwell's equations in Lorenz gauged A-V formulation which are spatially discretized by the finite integration technique. A numerical analysis extends the topological criteria for the index of the resulting differential-algebraic equations, as already derived in other works with similar field/circuit couplings. For the simulation, both a monolithic approach and waveform relaxation methods are investigated. The focus is on time integration, scaling methods, structural properties and a hybrid approach to solve the underlying linear systems of equations with the use of specialized solvers for the respective subsystems. Since the full-Maxwell approach causes additional derivatives in the coupling structure, previously existing convergence statements for the waveform relaxation of coupled differential-algebraic equations are not applicable and motivate a new convergence analysis. Based on this analysis, sufficient topological criteria are developed which guarantee convergence of Gauss-Seidel and Jacobi type waveform relaxation schemes for introduced coupled systems. Finally, numerical benchmarks are provided to support the introduced methods and theorems of this treatise.
Strohm, Christian [Verfasser]. "Circuit Simulation Including Full-Wave Maxwell's Equations / Christian Strohm." Berlin : Humboldt-Universität zu Berlin, 2021. http://d-nb.info/1229435077/34.
Повний текст джерелаXie, Zhongqiang. "Fourth-order finite difference methods for the time-domain Maxwell equations with applications to scattering by rough surfaces and interfaces." Thesis, Coventry University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369842.
Повний текст джерелаWang, Jenn-Nan. "Inverse backscattering for acoustic and Maxwell's equations /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/5794.
Повний текст джерелаOrdovas, Miquel Roland. "Covariant projection finite elements for transient wave propagation." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342285.
Повний текст джерелаFang, Fang, and Dinkoo Mehrdad. "Wave Energy of an Antenna in Matlab." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16587.
Повний текст джерелаMarchand, Renier Gustav. "Fine element tearing and interconnecting for the electromagnetic vector wave equation in two dimensions /." Link to online version, 2007. http://hdl.handle.net/10019/363.
Повний текст джерелаCaldwell, Trevor. "Nonlinear Wave Equations and Solitary Wave Solutions in Mathematical Physics." Scholarship @ Claremont, 2012. https://scholarship.claremont.edu/hmc_theses/32.
Повний текст джерелаVecchi, Eugenio. "Higher Order Wave Equations in Carnot Groups." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2369/.
Повний текст джерелаBíreš, Pavol. "Numerické metody výpočtu elektromagnetického pole." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218771.
Повний текст джерелаSvedberg, Christopher. "Future stability of the Einstein-Maxwell-Scalar field system and non-linear wave equations coupled to generalized massive-massless Vlasov equations." Doctoral thesis, KTH, Matematik (Avd.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93891.
Повний текст джерелаQC 20120503
Tap, Koray. "Complex source point beam expansions for some electromagnetic radiation and scattering problems." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1190015563.
Повний текст джерелаMarchand, Renier Gustav. "Finite element tearing and interconnecting for the electromagnetic vector wave equation in two dimensions." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/2471.
Повний текст джерелаThe finite element tearing and interconnect(FETI) domain decomposition(DD) method is investigated in terms of the 2D transverse electric(TEz) finite element method(FEM). The FETI is for the first time rigorously derived using the weighted residual framework from which important insights are gained. The FETI is used in a novel way to implement a total-/scattered field decomposition and is shown to give excellent results. The FETI is newly formulated for the time domain(FETI-TD), its feasibility is tested and it is further formulated and tested for implementation on a distributed computer architecture.
Bigorgne, Léo. "Propriétés asymptotiques des solutions à données petites du système de Vlasov-Maxwell." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS164/document.
Повний текст джерелаThe purpose of this thesis is to study the asymptotic properties of the small data solutions of the Vlasov-Maxwell system using vector field methods for both the electromagnetic field and the particle density. No compact support asumption is required on the initial data. Instead, we make crucial use of the null structure of the equations in order to deal with a resonant phenomenon caused by the particles approaching the speed of propagation of the Maxwell equations. Due to the robustness of vector field methods and contrary to previous works on this topic, we also study plasmas with massless particles.We start by investigating the high dimensional cases d ≥ 4 where dispersive effects allow us to derive strong decay rate on the solutions of the system and their derivatives. For that purpose, we proved a new decay estimate for solutions to massive relativistic transport equations. In order to obtain an analogous result for massless particles, we required the velocity support of the distribution function to be initially bounded away from $0$ and we then proved that this assumption is actually necessary. The second part of this thesis is devoted to the three dimensional massless case, where a stronger understanding of the null structure of the Vlasov-Maxwell system is essential in order to derive the optimal decay rate of the null components of the electromagnetic field, the velocity average of the particle density and their derivatives. We then focus on the asymptotic behavior of the small data solutions of the massive Vlasov-Maxwell system in 3d. Specific problems force us to modify the vector fields used previously to study the Vlasov field in order to compensate the worst error terms in the commuted transport equations. Finally, still for the massive system in 3d, we restrict our study of the solutions to the exterior of a light cone. The strong decay properties satisfied by the velocity average of the particle density in such a region permit us to relax the hypothesis on the initial data and lead to a much simpler proof
Port, Martin. "Modelování elektromagnetického pole ve tkáni." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-374595.
Повний текст джерелаJoly, Patrick. "Analyse numérique et mathématique de problèmes liés à la propagation d'ondes acoustiques élastiques et électromagnetiques." Paris 9, 1987. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1987PA090007.
Повний текст джерелаFontaine, Adrien. "Relations de dispersion dans les plasmas magnétisés." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S029/document.
Повний текст джерелаThis thesis describes how electromagnetic waves propagate in magnetized plasmas, when the frequencies are in a range around the electron cyclotron frequency. It focuses on the mathematical analysis of the characteristic varieties which are associated with relativistic Vlasov-Maxwell systems involving fast parameters. The first part is concerned with cold plasmas issued from planetary magnetospheres. We explain how to obtain the dispersion relations in the case where the magnetic field is given by a dipole model. This leads to the detailed study of some algebraic varieties from the cotangent space: the so-called ordinary and extraordinary cones and spheres. The geometrical description of these cones and spheres gives access to a complete classification of the electromagnetic waves which can propagate. Various applications are proposed, concerning the eikonal equation and the absence of purely parallel propagation, or concerning the structure of whistler waves. The second part focuses on the modelling of hot plasmas, typically like those involved in tokamaks. We prove in a realistic context that the propagation of electromagnetic waves is governed by some dielectric tensor. This tensor is obtain via some careful analysis of the kinetic resonances, which are issued from the interactions between the particles (Vlasov) and the waves (Maxwell). It can be expressed as an infinite sum of singular integrals, involving the Hilbert transform. The mathematical meaning of the formula defining this tensor is rigorously justified
Palaoro, Denilso. "Formulação em termos de espinores de duas componentes da teoria eletromagnética clássica." Universidade do Estado de Santa Catarina, 2009. http://tede.udesc.br/handle/handle/1999.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
In this work the two-component spinor formulation of the classical theory of electromagnetic fields is presented. In particular, we obtain explicitly the wave equa-tion for photons of both helicities. For this purpose, we present first the formulation of the theory in Minkowski spacetime together with the homomorphism between SL(2;C) and the restricted Lorentz group.
Neste trabalho apresentaremos a formulação da teoria eletromagnética clássica em termos de espinores de duas componentes. Em particular, obteremos explicitamente as equações de onda para fotons de ambas helicidades. Para isso, primeiro trataremos explicitamente da formulação covariante da teoria eletromagnética clássica. Explicitaremos também o homomorfismo entre o grupo SL(2,C) e o grupo de Lorentz restrito.
Bonnet, Anne-Sophie. "Analyse mathematique de la propagation de modes guides dans les fibres optiques." Paris 6, 1988. http://www.theses.fr/1988PA066093.
Повний текст джерелаGéze, Daniel. "Modelování šíření elektromagnetického pole v tunelech." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-221050.
Повний текст джерелаBereznanin, Martin. "Modelování elektromagnetických polí v biologoických tkáních." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218772.
Повний текст джерелаWatson, Francis Maurice. "Better imaging for landmine detection : an exploration of 3D full-wave inversion for ground-penetrating radar." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/better-imaging-for-landmine-detection-an-exploration-of-3d-fullwave-inversion-for-groundpenetrating-radar(720bab5f-03a7-4531-9a56-7121609b3ef0).html.
Повний текст джерелаOrndorff, Josh. "Amplified Total Internal Reflection at the Surface of Gain Medium." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365156891.
Повний текст джерелаPhung, Kim Dang. "Stabiblisation d'ondes électromagnétiques." Cachan, Ecole normale supérieure, 1998. http://www.theses.fr/1998DENS0010.
Повний текст джерелаAbenius, Erik. "Direct and Inverse Methods for Waveguides and Scattering Problems in the Time Domain." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6013.
Повний текст джерелаKotol, Martin. "Neuronové modelování elektromegnetických polí uvnitř automobilů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-390291.
Повний текст джерелаKeefer, Olivia A. "Operator splitting methods for Maxwell's equations in dispersive media." Thesis, 2012. http://hdl.handle.net/1957/30019.
Повний текст джерелаGraduation date: 2012
Access restricted to the OSU Community at author's request from June 20, 2012 - Dec. 20, 2012
"Numerical studies of some stochastic partial differential equations." Thesis, 2008. http://library.cuhk.edu.hk/record=b6074630.
Повний текст джерелаMany physical and engineering phenomena are modeled by partial differential equations which often contain some levels of uncertainty. The advantage of modeling using so-called stochastic partial differential equations (SPDEs) is that SPDEs are able to more fully capture interesting phenomena; it also means that the corresponding numerical analysis of the model will require new tools to model the systems, produce the solutions, and analyze the information stored within the solutions.
One of the goals of this thesis is to derive error estimates for numerical solutions of the above four kinds SPDEs. The difficulty in the error analysis in finite element methods and general numerical approximations for a SPDE is the lack of regularity of its solution. To overcome such a difficulty, we follow the approach of [4] by first discretizing the noise and then applying standard finite element methods and discontinuous Galerkin methods to the stochastic Helmholtz equation and Maxwell equations with discretized noise; standard finite element method to the stochastic parabolic equation with discretized color noise; Galerkin method to the stochastic wave equation with discretized white noise, and we obtain error estimates are comparable to the error estimates of finite difference schemes.
We shall focus on some SPDEs where randomness only affects the right-hand sides of the equations. To solve the four types of SPDEs using, for example, the Monte Carlo method, one needs many solvers for the deterministic problem with multiple right-hand sides. We present several efficient deterministic solvers such as flexible CG method and block flexible GMRES method, which are absolutely essential in computing statistical quantities.
Zhang, Kai.
Adviser: Zou Jun.
Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3552.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2008.
Includes bibliographical references (leaves 144-155).
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstracts in English and Chinese.
School code: 1307.
Terespolsky, Brett Ryan. "An approximation to the Heidler Function with an analytical integral for engineering applications using lightning currents." Thesis, 2015. http://hdl.handle.net/10539/22605.
Повний текст джерелаThe work presented contributes to research in lightning protection simulations and focuses on approximating the Heidler function with an analytical integral and hence a frequency domain representation. The integral of lightning current models is required in the analysis of lightning events including the induced effects and frequency analyses of lightning strikes. Previous work in this area has produced very specific forms of the Heidler function that are used to represent lightning current waveshapes. This work however focuses on a generic solution with parameters that can be modified to produce any lightning current waveshape that is required. In the research presented, such an approximation is obtained. This function has an analytical solution to the integral and hence can be completely represented in the frequency domain. This allows for a true representation of Maxwell’s equations for Electromagnetic (EM) fields and for an analytical frequency domain analysis. It has parameters that can be changed to obtain different waveshapes (10/350, 0.25/100, etc.). The characteristics of the approximation are compared with those of the Heidler function to ascertain whether or not the function is applicable for use with the lightning protection standard (IEC 62305-1). It is shown that the approximation does represent the same characteristics as those of the Heidler function and hence can be used in IEC 62305-1 standardised applications. This represents a valuable contribution to engineers working in the field of lightning protection, specifically simulation models.
MT2017
Tsuji, Paul Hikaru. "Fast algorithms for frequency domain wave propagation." 2012. http://hdl.handle.net/2152/19533.
Повний текст джерелаtext
San, Roman Alerigi Damian. "Exploring Heterogeneous and Time-Varying Materials for Photonic Applications, Towards Solutions for the Manipulation and Confinement of Light." Diss., 2014. http://hdl.handle.net/10754/335793.
Повний текст джерелаSabouni, Abas. "Ultra-WideBand (UWB) microwave tomography using full-wave analysis techniques for heterogeneous and dispersive media." 2011. http://hdl.handle.net/1993/4834.
Повний текст джерелаSchulz, Jochen. "Field reconstructions and range tests for acoustics and electromagnetics in homogeneous and layered media." Doctoral thesis, 2007. http://hdl.handle.net/11858/00-1735-0000-0006-B3A5-B.
Повний текст джерела