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    Browsing Doctoral Degrees (Electrical and Electronic Engineering) by Title 
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    •   SUNScholar
    • Faculty of Engineering
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    • Doctoral Degrees (Electrical and Electronic Engineering)
    • Browsing Doctoral Degrees (Electrical and Electronic Engineering) by Title
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    Browsing Doctoral Degrees (Electrical and Electronic Engineering) by Title

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    Now showing items 57-76 of 134

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        Efficient finite element electromagnetic analysis of antennas and microwave devices : the FE-BI-FMM formulation and a posteriori error estimation for p adaptive analysis 

        Botha, Matthys Michiel (Stellenbosch : Stellenbosch University, 2002-09)
        ENGLISH ABSTRACT: This document presents a Galerkin FE formulation for the full-wave, frequency domain, electromagnetic analysis of three dimensional structures relevant to microwave engineering, together with the ...
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        Efficient high-order time domain finite element methods in electromagnetics 

        Marais, Neilen (Stellenbosch : University of Stellenbosch, 2009-03)
        The Finite Element Method (FEM) as applied to Computational Electromagnetics (CEM), can beused to solve a large class of Electromagnetics problems with high accuracy and good computational efficiency. For solving wide-band ...
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        Efficient Mixed-Order Hidden Markov Model Inference 

        Schwardt, Ludwig (Stellenbosch : University of Stellenbosch, 2007-12)
        Higher-order Markov models are more powerful than first-order models, but suffer from an exponential increase in model parameters with order, which leads to data scarcity problems during training. A more efficient ...
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        Efficient numerical analysis of finite antenna arrays using domain decomposition methods 

        Ludick, Daniel Jacobus (Stellenbosch : Stellenbosch University, 2014-12)
        ENGLISH ABSTRACT: This work considers the efficient numerical analysis of large, aperiodic finite antenna arrays. A Method of Moments (MoM) based domain decomposition technique called the Domain Green's Function Method ...
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        Empirical state space modelling with application in online diagnosis of multivariate non-linear dynamic systems 

        Barnard, Jakobus Petrus (Stellenbosch : Stellenbosch University, 1999-12)
        ENGLISH ABSTRACT: System identification has been sufficiently formalized for linear systems, but not for empirical identification of non-linear, multivariate dynamic systems. Therefore this dissertation formalizes and ...
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        Estimating the Pen Trajectories of Static Handwritten Scripts using Hidden Markov Models 

        Nel, Emli-Mari (Stellenbosch : University of Stellenbosch, 2005-12)
        Individuals can be identified by their handwriting. Signatures are, for example, currently used as a biometric identifier on documents such as cheques. Handwriting recognition is also applied to the recognition of ...
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        Evaluation and design aspects of magnetic gears and magnetically geared electrical machines 

        Gerber, Stiaan (Stellenbosch : Stellenbosch University, 2015-12)
        ENGLISH ABSTRACT: In the past decade, magnetic gears and magnetically geared electrical machines have emerged as electromechanical devices with exceptionally high torque densities. Their distinct advantages such as low ...
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        An experimental study of artificial isotropic chiral media at microwave frequencies 

        Smith, Anthonie Gronum (Stellenbosch : Stellenbosch University, 1994-12)
        ENGLISH ABSTRACT: An artificial chiral medium can be made by embedding metal helices (chiral or handed structures) with random orientation inside au achiral hnst medium. The electromagnetic behaviour of such artificial ...
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        Fabrication of Josephson junctions using AFM nanolithography 

        Elkaseh, Akram Abdulsalam (Stellenbosch : University of Stellenbosch, 2010-12)
        ENGLISH ABSTRACT: Planar weak link structures, such as micro-bridges, variable thickness bridges and nanobridges, have always attracted a lot of attention. Their potential to behave as real Josephson elements make them ...
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        Fast Mesh-based physical optics for large-scale electromagnetic analysis 

        Xiang, Daopu (Stellenbosch : Stellenbosch University, 2016-12)
        ENGLISH ABSTRACT: At sufficiently high frequencies, the electrical size of scattering objects become very large. The electromagnetic field simulation of such objects becomes prohibitively expensive with physically rigorous ...
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        Fast multi-core CEM solvers and flux trapping analysis for superconducting structures 

        Jackman, Kyle (Stellenbosch : Stellenbosch University, 2018-03)
        ENGLISH ABSTRACT: The dissertation presents the development of a numerical field solver, called TetraHenry (TTH), for inductance extraction and flux trapping analysis of superconducting integrated circuits. The solver ...
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        A Fixed Switching Frequency technique for finite-set model predictive control of power electronic converters 

        Tomlinson, Daniels Males (Stellenbosch : Stellenbosch University, 2016-03)
        ENGLISH ABSTRACT: A fixed switching frequency scheme for finite-control-set model predictive control is resented. The purpose of the control scheme is to achieve an output waveform quality that compares well to that of a ...
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        A framework and criteria for the operability of unmanned aircraft systems 

        Maneschijn, Anton (Stellenbosch : University of StellenboschDrone aircraftAirplanes -- Radio control, 2010-12)
        ENGLISH ABSTRACT: Airworthiness certification of unmanned aircraft systems (UAS) is normally considered to be a regulatory function. In the absence of comprehensive UAS airworthiness regulations, the development of new ...
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        From high-speed superconducting devices to nanosensors 

        Perold, Willem (Stellenbosch : Stellenbosch University, 2017-03)
        ENGLISH ABSTRACT: In this dissertation the story of a research career spanning 34 years is told. It started in microelectronics in the early 1980’s and focused on aspects of design and optimization of high-voltage diodes. ...
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        GPU acceleration of matrix-based methods in computational electromagnetics 

        Lezar, Evan (Stellenbosch : University of Stellenbosch, 2011-03)
        ENGLISH ABSTRACT: This work considers the acceleration of matrix-based computational electromagnetic (CEM) techniques using graphics processing units (GPUs). These massively parallel processors have gained much support ...
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        Growth-based computer aided design strategies for multimode waveguide design with the aid of functional blocks 

        Vale, Christopher A. W. (Stellenbosch : Stellenbosch University, 2001-12)
        ENGLISH ABSTRACT: A new technique for the design of multimode devices in overmoded waveguide is presented. The technique applies the principle of growth-based design and uses a conceptual functional block representation ...
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        Hardware description language modelling and synthesis of superconducting digital circuits 

        Muchuka, Nicasio Maguu (Stellenbosch : Stellenbosch University, 2017-03)
        ENGLISH ABSTRACT: The energy demands and computational speed in high performance computers threatens the smooth transition from petascale to exascale systems. Miniaturization has been the art used in CMOS (complementary ...
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        Improving the direction-dependent gain calibration of reflector antenna radio telescopes 

        Young, Andre (Stellenbosch : Stellenbosch University, 2013-12)
        ENGLISH ABSTRACT: Utilising future radio interferometer arrays, such as the Square Kilometre Array (SKA), to their full potential will require calibrating for various direction- dependent effects, including the radiation ...
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        Interpolation-based modelling of microwave ring resonators 

        Schoeman, Marlize (Stellenbosch : University of Stellenbosch, 2006-12)
        Resonant frequencies and Q-factors of microwave ring resonators are predicted using interpolation- based modelling. A robust and efficient multivariate adaptive rational-multinomial combination interpolant is presented. ...
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        Investigation into possible mechanisms of light pollution flashover of 275kv transmission lines as a cause of unknown outages 

        Kleinhans, Kevin (Stellenbosch : University of Stellenbosch, 2005-03)
        The cause of the largest number of faults on the Eskom main transmission system is unknown. It is believed that a non-uniform pollution layer along an insulator string is the reason for these anomalous flashovers. This ...

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