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Theses and Dissertations (Electrical, Electronic and Computer Engineering): Recent submissions
Now showing items 1-20 of 437
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(University of Pretoria, 2020)With the advent of Industry 4.0, indoor localization is central to many applications across multiple domains. Although impulse-radio ultra-wideband (IR-UWB) enables high precision time-of-arrival (TOA) based ranging and ...
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(University of Pretoria, 2019-12)Existing energy management problems for a multi-microgrid (MMG) system only minimise the operational cost. This study proposes a multi-objective operational cost and emissions minimisation (OCEM) problem for a grid-tied ...
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(University of Pretoria, 2023-11-01)Model-based controllers often extend improved performance to mineral processing plants by leveraging predictive models to account for system dynamics, handling constraints, adapting to changing conditions, and optimizing ...
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(University of Pretoria, 2024-02-09)In this study, a model of a dense medium separation circuit of an iron ore plant in South Africa is developed, focusing on the flow of medium in the circuit. The model is validated using plant data. The model is used to ...
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(University of Pretoria, 2023-06)This work presents the effect of temperature change on the capacitance of GaAs PIN diodes and the resulting change in performance of RF limiters at VHF. Device temperatures were varied between -25 ºC and 100 ºC, with ...
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(University of Pretoria, 2024-02-12)This study explores the feasibility of constructing a small-scale speech recognition system capable of competing with larger, modern automated speech recognition (ASR) systems in both performance and word error rate (WER). ...
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(University of Pretoria, 2023)This research introduces an specific emitter identification (SEI) system to enhance secure transmission systems, addressing a critical gap in existing studies. Existing studies lack a comprehensive solution for authenticating ...
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(University of Pretoria, 2023-08-22)A Wireless Multimedia Sensor Network (WMSN) make possible new surveillance applications in environments that traditional systems would not handle, including search and rescue operations after a disaster. However, WMSNs ...
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(University of Pretoria, 2023)Exposure to pathogenic Escherichia coli (E. coli) bacteria through contaminated water can cause potentially life-threatening diarrhea and vomiting, and it is a useful water quality indicator. Simulations and experiments ...
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(University of Pretoria, 2023)Pressure on the utility grid and aims to reduce carbon emissions have led to the development of micro-grids. Extensive research has been done to optimally utilise the various energy sources present therein. Demand management ...
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(University of Pretoria, 2022)With growing effects of global warming, batteries have a crucial role to play in supporting global effort to reach carbon neutrality. However, batteries remain prone to early failure. Operational causes of premature ...
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(University of Pretoria, 2023)This work builds on existing observable dynamic models of froth flotation circuits, aimed at on-line parameter estimation and model-based control. The models are analysed and two main limitations are identified and ...
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(University of Pretoria, 2023-03-31)In this work, a series-fed antenna is designed with beam-squint compensation. The horn array operates between 21.5 GHz and 23.5 GHz. Beam-squint compensation is designed into the array using time delay equalisation, thus ...
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(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 ...
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(University of Pretoria, 2023)Auto-tuning of multi-input multi-output (MIMO) controllers of a bulk tailing treatment (BTT) surge tank is presented. Two controllers are selected for optimisation. The first controller is a decentralised proportional-integral ...
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(University of Pretoria, 2022)Microgrids are gaining popularity due to their ability to integrate distributed renewable energy generation. In addition, direct current (DC) - based operation results in significantly higher operational efficiency. However, ...
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(University of Pretoria, 2022)The addition of a short-term energy-storage system in conjunction with the battery to reduce fuel consumption, reduce emissions, and increase the service life of the battery is considered. A quasi-static simulation approach ...
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(University of Pretoria, 2023)Detailed steady and transient state models of vapor compression (VC) systems have been suggested in this work so that the governing parameters of the refrigerant dynamics such as pressure, enthalpy and temperature could ...
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(University of Pretoria, 2022)The development of wireless technologies such as the Long Range Wide Area Network (LoRaWAN) protocol has enabled connectivity for a wide range of devices for optimisation and automation purposes. These types of technologies ...
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(University of Pretoria, 2023)Over the past few decades radar cross section (RCS) manipulation has become increasingly important. This increase in interest is due to the development and improvement of stealth technology. While many RCS manipulation ...
Now showing items 1-20 of 437