Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"surface integral"”.
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Radome Diagnostics: utilizing Source Reconstruction based on Surface Integral Representations
… the tangential electromagnetic fields on radome surfaces, disclosing the radome influence on the electromagnetic fields as well as the positions and influences of defects. The source reconstruction is based on a surface integral representation together with the extinction theorem. The extinction …
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Augmented Surface Integral Equation Method for Low-Frequency Electromagnetic Analysis
Several fundamental aspects of the surface integral equation (SIE) method including the low-frequency breakdown, the skin effect, and the substrate effect, have been addressed for full-wave electromagnetic analysis in the low-frequency regime, especially the modeling of electrical interconnects on …
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A surface integral equation method for dielectrics at low frequencies
This thesis is dedicated to using surface integral equations to solve electro- magnetic problems involved in integrated circuits. Since normally the sizes of the devices in this application are much smaller than the wavelength of the electromagnetic waves, special considerations are needed because …
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Substrate resistance extraction using a multi-domain surface integral formulation
… substrate, using an FFT-accelerated multi-domain surface integral formulation. The multi-domain surface integral formulation allows for multi-layered substrates, without meshing the volume. This method has the advantages of easy meshing, simple implementation, and FFT-accelerated iterative …
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Fast algorithm and surface integral equations for two-dimensional materials modeling
… achieved with a multi-level scheme. Then a metasurface platform to generate structured light at second harmonics is proposed with transition metal dichalcogenide (TMDC) flakes. With the aid of the electric field integral equation and impedance boundary condition, the surface currents on TMDC …
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Surface integral finite element hybrid method for localized problems in continuum mechanics
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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A new surface integral formation of EMQS impedance extraction for 3-D structures
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Studies of some issues in solving surface integral equations and the equivalence principle algorithm
… with the formulation for the electric field integral equation (EFIE), and visit the necessary treatment of the magnetic field integral equation (MFIE), the combined field integral equation (CFIE), and the Poggio-Miller-Chu-Harrington- Wu-Tsai (PMCHWT) along with various singularity extraction …
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Surface integral and finite element hybrid method for the analysis of three-dimensional fractures
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1989.
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Numerical green's function in surface integral equation method and hydrodynamic model for solar cell analysis
… of numerical Green's function (NGF) in the surface integral equation (SIE) method for inhomogeneous media have been addressed, including the process of solving for the NGF from differential equation, the integrating of NGF with SIE, the NGF based augmented-electric field integral equation …
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The use of conduction mode basis functions in surface integral formulation for wideband impedance extraction
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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A Study of Radiofrequency Cardiac Ablation Using Analytical and Numerical Techniques
… The solution, which was obtained using integral transforms, has the form of a surface integral nested within another surface integral. An integration routine capable of evaluating such integrals was developed and a C program was written to implement this routine. The surface integration …
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Accuracy improvement of the second-kind Fredholm integral equations in computational electromagnetics
… electromagnetics, the second-kind Fredholm integral equations (IEs) are known to have very fast iterative convergence but rather poor solution accuracy compared with the first-kind Fredholm integral equations. The loss of the numerical accuracy is mainly due to the discretization error of …
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Using the method of moments and Robin Hood method to solve electromagnetic scattering problems
… scatterers. This was implemented by using a surface integral formulation of Maxwell's equations, which discretizes the surface of the scatterer into thousands of triangles. The method of moments (MoM) was applied, which calculates the Green's functions between each triangle element. A matrix …
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Singular high-order complete vector functions for the analysis and design of electromagnetic structures with Finite Methods
… and efficient numerical solutions of both surface integral and differential problems. Sample numerical results confirm the faster convergence of these bases on wedge problems.
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Fast algorithms for solving integral equations of electromagnetic wave scattering
… solving two-dimensional and three-dimensional integral equations of electromagnetic wave scattering. They include: (1) The fast iterative method, which reduces the matrix-vector multiplication from $N\sp2$ to $N\sp{1.5}$ and to N (log(N) $\sp2.$ (2) A fast far-field approximation (FAFFA) …
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An enhanced augmented electric field integral equation and the calculation of casimir force using computational electromagnetics
In this dissertation, a surface integral equation formulation is developed for low-frequency problems by generalizing the existing augmented electric field integral equation from the perfect electric conductors to the dielectrics and general conductors. Detailed discussions of the basis functions …
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A fast 3D full-wave solver for nanophotonics
Conventional fast integral equation solvers seem to be ideal approaches for simulating 3-D nanophotonic devices, as these devices are considered to be open structures, generating fields in both an interior channel and in the infinite exterior domain. However, many devices of interest, such as …
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Electromagnetic analysis with discrete exterior calculus
… for both partial differential equation (PDE) and integral equation (IE) based approaches. A systematical treatment is proposed for various boundary conditions. With a careful implementation of the Hodge star operators, we are able to represent and solve electromagnetic PDEs properly with DEC. And …
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A bacterial algorithm for surface mapping using a Markov modulated Markov chain model of bacterial chemotaxis
… In this thesis we introduce an algorithm for surface mapping, which tracks the motion of a bacteria-like software agent (based on a low-level model of the biochemical network responsible for chemotaxis) on a surface or objective function. Towards that end, a discrete Markov modulated Markov …
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