Browsing Electrical, Electronic and Computer Engineering by Title

Browsing Electrical, Electronic and Computer Engineering by Title

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  • An optimized dual-polarized quad-ridges horn antenna with pyramidal sidewalls 
    Van der Merwe, Pieter Hugo (University of Pretoria, 2013)
    It is well known that quad-ridged horn antennas in general have impedance and radiation characteristics that are significantly worse than that of their double-ridged counterparts. Normally a voltage standing wave ratio ...
  • Optimized lockdown strategies for curbing the spread of COVID-19 : a South African case study 
    Olivier, Laurentz Eugene; Botha, Stefan; Craig, Ian Keith (Institute of Electrical and Electronics Engineers, 2020-11)
    To curb the spread of COVID-19, many governments around the world have implemented tiered lockdowns with varying degrees of stringency. Lockdown levels are typically increased when the disease spreads and reduced when ...
  • Optimized response to electricity time-of-use tariff of a compressed natural gas fuelling station 
    Kagiri, Charles; Wanjiru, Evan M.; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2018-07)
    Compressed natural gas propulsion of vehicles has been shown to have advantages over petrol and diesel propulsion due to lower carbon dioxide emissions as well as the increased durability of vehicle engines. The growth of ...
  • Optimizing flotation performance using extremum seeking control 
    Wepener, Daniël Adriaan (University of Pretoria, 2023)
    In this dissertation, a flotation circuit is controlled in simulation using an extremum seeking control (ESC) approach to optimize the flotation performance of the circuit using peak air recovery. Flotation is a separation ...
  • Optimizing grinding mill performance using extremum seeking control 
    Ziolkowski, L.; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2021)
    A semi-autogenous grinding mill is simulated with an extremum seeking controller to maximize the performance of the mill using grind curves. Grind curves map the essential performance measures of a grinding mill to the ...
  • Optimizing LDPC codes for a mobile WiMAX system with a saturated transmission amplifier 
    Salmon, Brian Paxton (University of Pretoria, 2009-04-09)
    In mobile communication, the user’s information is transmitted through a wireless communication link that is subjected to a range of deteriorating effects. The quality of the transmission can be presented by the rate of ...
  • Optimizing radio resources for multicasting on high-altitude platforms 
    Ibrahim, Ahmed; Alfa, Attahiru Sule (Hindawi Publishing, 2019-08-29)
    High-altitude platforms (HAPs) are quasi-stationary aerial wireless communications platforms meant to be located in the stratosphere, to provide wireless communications and broadband services. They have the ability to fly ...
  • Optimizing the energy and throughput of a water-quality monitoring system 
    Olatinwo, Segun Olatunbosun; Joubert, Trudi-Heleen (MDPI Publishing, 2018-04-13)
    This work presents a new approach to the maximization of energy and throughput in a wireless sensor network (WSN), with the intention of applying the approach to water-quality monitoring. Water-quality monitoring using ...
  • The optimum communications architecture for deep level gold mining 
    Miller, Mark Henry Bruce (University of Pretoria, 2007-01-12)
    Please read the abstract in the front matter of this document.
  • Oscillation-based test applied to a wideband CCII 
    Petrashin, Pablo; Toledo, Luis; Lancioni, Walter; Osuch, Piotr Jan; Stander, Tinus (Hindawi Publishing, 2017)
    Oscillation-based testing (OBT) has been proven to be a simple, yet effective VLSI test for numerous circuit types. This paper investigates, for the first time, the application of OBT verification for second generation ...
  • Oscillation-based test in a CCII-based bandpass filter 
    Osuch, Piotr Jan; Stander, Tinus; Petrashin Pablo; Toledo, Luis; Lancioni, Walter (Institute of Electrical and Electronics Engineers, 2017-02)
    Oscillation based testing (OBT) has proven to be a simple yet effective VLSI test for numerous circuit types. In this work, OBT is applied to test Second-generation Current Conveyor (CCII) based filters for the first ...
  • Otitis media diagnosis for developing countries using tympanic membrane image-analysis 
    Myburgh, Hermanus Carel; Van Zijl, Willemien H.; Swanepoel, De Wet; Hellström, Sten; Laurent, Claude (Elsevier, 2016-03)
    BACKGROUND : Otitis media is one of the most common childhood diseases worldwide, but because of lack of doctors and health personnel in developing countries it is often misdiagnosed or not diagnosed at all. This may ...
  • Outage and throughput analysis of cognitive users in underlay cognitive radio networks with handover 
    Okegbile, S.D. (Samuel); Maharaj, Bodhaswar Tikanath Jugpershad; Alfa, Attahiru Sule (Institute of Electrical and Electronics Engineers, 2020-11)
    Interference characterization in cognitive networks with handover has received less attention in stochastic geometry-based interference management and control, especially in cognitive radio networks, because of the ...
  • Output consensus of multi-agent systems with delayed and sampled-data 
    Chen, Fangting; Yu, Hui; Xia, Xiaohua (Institution of Engineering and Technology, 2017-03)
    This paper considers the output consensus problem of high-order leader-following multi- agent systems with unknown nonlinear dynamics, in which the delayed and sampled outputs of the system are the only available data. ...
  • Overlay virtualized wireless sensor networks for application in industrial internet of things 
    Nkomo, Malvin; Hancke, Gerhard P.; Abu-Mahfouz, Adnan Mohammed; Sinha, Saurabh; Onumanyi, A.J. (Adeiza) (MDPI Publishing, 2018-09-23)
    In recent times, Wireless Sensor Networks (WSNs) are broadly applied in the Industrial Internet of Things (IIoT) in order to enhance the productivity and efficiency of existing and prospective manufacturing industries. ...
  • An overview of renewable energy resources and grid integration for commercial building applications 
    Mbungu, Nsilulu Tresor; Naidoo, Raj; Bansal, Ramesh C.; Siti, Mukwanga W.; Tungadio, Diambomba H. (Elsevier, 2020-06)
    This paper presents an overview of the integration of renewable energy resources in the urban sector. The article also describes the current global energy demand and growth challenges that the world is currently facing. ...
  • Overview of the optimal smart energy coordination for microgrid applications 
    Mbungu, Nsilulu Tresor; Naidoo, Raj; Bansal, Ramesh C.; Vahidinasab, Vahid (Institute of Electrical and Electronics Engineers, 2019)
    This paper describes an overview of the optimal energy coordination/management approaches for microgrids. The article presents the smart grid environment in conjunction with their technologies into the applications of a ...
  • PAPR reduction in FBMC systems using an FBMC optimized ACE method 
    Van der Neut, Nuan (University of Pretoria, 2015)
    The aim of this dissertation was to investigate peak-to-average power ratio (PAPR) reduction techniques for filter bank multicarrier (FBMC) modulated systems. Research into current PAPR reduction techniques in FBMC and ...
  • PAPR reduction in FBMC using an ACE-based linear programming optimization 
    Van der Neut, Nuan; Maharaj, Bodhaswar Tikanath Jugpershad; De Lange, Frederick; González, Gustavo J.; Gregorio, Fernando; Cousseau, Juan (SpringerOpen, 2014-12)
    This paper presents four novel techniques for peak-to-average power ratio (PAPR) reduction in filter bank multicarrier (FBMC) modulation systems. The approach extends on current PAPR reduction active constellation extension ...
  • Parametric circuit fault diagnosis through oscillation based testing in analogue circuits : statistical and deep learning approaches 
    Cloete, Jacob B.; Stander, Tinus; Wilke, Daniel Nicolas (Institute of Electrical and Electronics Engineers, 2022-02)
    Oscillation-based testing of analogue electronic filters removes the need for test signal synthesis. Parametric faults in the presence of normal component tolerance variation are challenging to detect and diagnose. This ...