• Risk–constrained stochastic economic dispatch and demand response with maximal renewable penetration under renewable obligation 

  Hlalele, Thabo Gregory (University of Pretoria, 2020)

  In the recent years there has been a great deal of attention on the optimal demand and supply side strategy. The increase in renewable energy sources and the expansion in demand response programmes has shown the need for ...
• Pressure buffering control to reduce pollution and improve flow stability in industrial gas headers 

  Wiid, Andries Johannes; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2021-10)

  This paper describes various regulatory and advanced control schemes which can be applied to industrial gas headers. The intention is to exploit the buffering capacity for pollution control as well as improve flow stability ...
• Compact 0.5–18 GHz double‐ridged guide horn antenna 

  Jacobs, Bennie; Odendaal, J.W. (Johann Wilhelm); Joubert, Johan (Wiley Open Access, 2021-03)

  Broadband double‐ridged guide horn (DRGH) antennas are extensively used in antenna measurement and electromagnetic compatibility and interference testing, especially the 1– 18 GHz DRGH antenna which is widely accepted as ...
• Pressure measurement location selection in industrial gas headers for buffering control 

  Wiid, Andries Johannes; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2021-02)

  This paper uses a nonlinear model of the pressure and flow dynamics inside a gas header to obtain the optimal pressure measurement location for buffering control. The nonlinear model is derived from governing equations ...
• Phase shifters with multiple independently controllable bands utilising frequency‐selective variable gain networks 

  Venter, J.J.P. (Johannes); Stander, Tinus (Wiley Open Access, 2021)

  A dual‐band vector‐sum phase shifter with independent phase control of the 2.4 and 5 GHz Wi‐Fi bands is presented. The network uses band‐limited variable gain amplification, with a broadband hybrid coupler at the input ...
• Distributed event-triggered output feedback H∞ control for multi-agent systems with transmission delays 

  Li, Yanjin; Yu, Hui; Xia, Xiaohua (Wiley Open Access, 2021-08)

  The output feedback H∞ consensus control problem of multi-agent systems is studied using an event-triggered control strategy. Two types of transmission delays, one from the system output to the output feedback controller ...
• Reweighted error reducing channel estimator for QoS enhancement in wireless nautical radio networks 

  Ijiga, Owoicho Emmanuel; Malekian, Reza; Chude-Okonkwo, Uche A.K. (Institute of Electrical and Electronics Engineers, 2021-10)

  Maritime explorations may suffer from unwanted situations such as delays, insecurity, congestions, and collisions, etc., which may arise from severe environmental conditions. Thus, there is a need to develop proper techniques ...
• Access and radio resource management for IAB networks using deep reinforcement learning 

  Sande, Malcolm Makomborero; Hlophe, Mduduzi Comfort; Maharaj, Bodhaswar Tikanath Jugpershad (Institute of Electrical and Electronics Engineers, 2021-08)

  Congestion in dense traf c networks is a prominent obstacle towards realizing the performance requirements of 5G new radio. Since traditional adaptive traf c signal control cannot resolve this type of congestion, realizing ...
• A tri-objective model for generator maintenance scheduling 

  Moyo, Learnmore; Nwulu, Nnamdi I.; Ekpenyong, Uduakobong E.; Bansal, Ramesh C. (Institute of Electrical and Electronics Engineers, 2021-10)

  The complexity of power systems is increasing as new generating units are added to power systems in order to supply power to the growing economies. This has resulted in further research into the generator maintenance ...
• AI meets CRNs : a prospective review on the application of deep architectures in spectrum management 

  Hlophe, Mduduzi Comfort; Maharaj, Bodhaswar Tikanath Jugpershad (Institute of Electrical and Electronics Engineers, 2021-08)

  The spectrum low utilization and high demand conundrum created a bottleneck towards ful lling the requirements of next-generation networks. The cognitive radio (CR) technology was advocated as a de facto technology to ...
• Software-defined power grids : a survey on opportunities and taxonomy for microgrids 

  Ndiaye, Musa; Hancke, Gerhard P.; Abu-Mahfouz, Adnan Mohammed; Zhang, Huifeng (Institute of Electrical and Electronics Engineers, 2021-07)

  Future generation power grids will require the introduction and deployment of distributed energy resources to meet modern-day load requirements. Consequently, we expect to see a rise in microgrids (MGs) existing as part ...
• Unified approach for synthesis and analysis of non-isolated DC-DC converters 

  Gitau, Michael Njoroge; Adam, Grain P.; Masike, Lebogang; Mbukani, Mwana Wa Kalaga (Institute of Electrical and Electronics Engineers, 2021-09)

  Transformational techniques unifying synthesis of two-state DC-DC converters and analytical synthesis techniques allowing generation of all possible converters meeting a certain criteria already exist. The analysis of a ...
• Model predictive control of a Venlo-type greenhouse system considering electrical energy, water and carbon dioxide consumption 

  Lin, Dong; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2021-09)

  Please read abstract in the article.
• A review on anaerobic digestion with focus on the role of biomass co-digestion, modelling and optimisation on biogas production and enhancement 

  Kunatsa, Tawanda; Xia, Xiaohua (Elsevier, 2022-01)

  The status, recent trends and future perspectives in modelling and optimisation of anaerobic co-digestion is investigated. Areas that can be focused on and those which need further research towards enhancing biogas production ...
• Co-digestion of water hyacinth, municipal solid waste and cow dung : a methane optimised biogas–liquid petroleum gas hybrid system 

  Kunatsa, Tawanda; Xia, Xiaohua (Elsevier, 2021-12)

  Fossil fuels are still the major source of energy in developing countries, howbeit expensive and environmentally unsustainable. Co-digestion substrate proportions and the respective biogas potentials for a huge number of ...
• Managing the harvested energy in wireless sensor networks : a priority Geo/Geo/1/k approach with threshold 

  Angwech, Otim Patricia; Alfa, Attahiru Sule; Maharaj, Bodhaswar Tikanath Jugpershad (Elsevier, 2022-11)

  Wireless sensor networks face many challenges, the major one being energy. Batteries are the main source of energy for the sensor nodes. When the battery is depleted, it must either be charged or replaced. This may be ...
• A computable general equilibrium model as a banking sector regulatory tool in South Africa 

  Beyers, Frederik Johannes Conradie; De Freitas, Allan; Essel-Mensah, Kojo Amonkwandoh; Seymore, Reyno; Tsomocos, Dimitrios P. (Wiley, 2022-03)

  A computable general equilibrium (CGE) model is used as a regulatory tool for the banking sector in South Africa. The model is used to determine the effects of regulatory penalties, capital adequacy requirements (CAR) and ...
• The implementation of wideband 90° hybrids on non-optimal substrates 

  Du Toit, Johan B.; Joubert, Johan; Odendaal, J.W. (Johann Wilhelm) (Wiley Open Access, 2021-01)

  A new technique to implement wideband 90° hybrid coupling profiles on non-optimal substrate configurations is presented. The technique uses an impedance taper over the whole length of the hybrid to remove the restriction ...
• An investigation into the spectral transfer function and characterization of a terrestrial solar-blind ultraviolet electro-optical system 

  Coetzer, Casper Johannes (University of Pretoria, 2015)

  Solar-blind Ultraviolet cameras are used to detect missile plumes and perform the detection of corona on high voltage electrical lines. This study investigates the influence of the spectral transfer function of a specific ...
• Optimal tyre management for a high-performance race car 

  West, Wilhelm Joachim; Limebeer, D.J.N. (Taylor and Francis, 2022)

  Optimal control is used to study the management of tyre performance for a Formula One car. Tyre friction is compromised by accumulated wear and operation outside the tyre design temperature window – inappropriate thermal ...

View more