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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 11 to 20 of 242 (0.305 seconds)| 11 |
Efficient eigenvalue based analysis of bounded and unbounded electromagnetic fieldsDai, Qi, 代祺 January 2013 (has links)
Eigenvalue problems find important applications in engineering electromagnetics. The most studied examples are cavity resonance problems and wave guidance problems, in which the electromagnetic fields are bounded or semi-bounded. Efficient eigenvalue based analysis is developed to investigate both bounded and unbounded fields in a unified manner. Incorporating a locally-conformal finite difference technique, a modal expansion based model order reduction is proposed to elucidate complicated physics of wave-matter interaction, and the fast field approximation provides quick guidance to design and optimization problems of a variety of devices. As the key to modal expansion, modal analysis for interior spectrum needs to be carried out efficiently in large scale applications. A null-space shift algorithm and a fast cosine- and sine- transform based preconditioning scheme are proposed to greatly enhance the performance of a conventional eigensolver. To model multi-junction parallel plate waveguides, both explicit and implicit mode matching schemes are introduced, where eigenanalysis are incorporated. Both schemes intelligently conform to the geometrical characteristics, which are suitable for demonstrating interesting phenomena of zero index materials. Finally, a differential forms inspired discretization scheme is proposed for the edge element based finite element analysis of waveguide problems where the variational expressions involve transverse fields only. Differential forms provide useful insight on the discretization of complicated variational expressions. / published_or_final_version / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy
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NONRESONANT EXCITATION OF ELECTROMAGNETIC FIELDS IN A BOUNDED MAGNETOPLASMAJackson, Gary Leslie, 1945- January 1977 (has links)
No description available.
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Charged particle deflection by a non-uniform oscillating electric fieldHolland, Douglas Francis, 1938- January 1974 (has links)
No description available.
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Joint-inversion of wenner resistivity and frequency domain electromagnetic dataCallaham, John Minton 08 1900 (has links)
No description available.
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Analytical compensation for near-field probe positioning errors in calculated far-field antenna patternsCorey, L. E. (Larry Edward) 05 1900 (has links)
No description available.
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New approximations in finite element calculation in high frequencyXu, Xiaoming January 1997 (has links)
No description available.
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Risk perception and communication within a personal construct theory frameworkBradley, G. January 2003 (has links)
No description available.
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Analysis of a test technique for hardness surveillanceMarcum, Frank. January 1988 (has links)
Thesis (M.S.)--Ohio University, June, 1988. / Title from PDF t.p.
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On the motion of an electron in spatially dependent electromagnetostatic fields /Headland, Michael. January 1975 (has links) (PDF)
Thesis (M.Sc.) -- University of Adelaide, Mawson Institute for Antarctic Research, 1976.
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Ambipolar electric fields and turbulence studies in the Wisconsin levitated toroidal octupoleArmentrout, Charles Jesse. January 1977 (has links)
Thesis--Wisconsin. / Vita. Includes bibliographical references.
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