Browsing Faculty of Engineering by Title
Now showing items 1-20 of 1129
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3-D Finite element method analysis of twin-armature permanent magnet motor with two degrees of mechanical freedom
(Springer, 2016)In this paper, the authors present a twin-armature rotary–linear permanent magnet (PM) motor. The stator consists of two armatures which generate two rotating magnetic fields and the rotor consists of two rigidly coupled ... -
Ab initio insights on the effect of embedding lanthanide atoms on nitrogenated holey doped graphene (g-C2N)
(RSC, 2018)Within the density functional theory formalism with the Hubbard correction (DFT+U) we explore how the structural, electronic and magnetic properties of nitrogenated holey doped graphene (g-C2N) can be tuned through embedding ... -
Ab initio studies of the structural, electronic and magnetic properties of stannite CuFe 2 -III-VI 4 (III = Al, Ga, In and VI = S, Se, Te) alloys
(Elsevier, 2020)The structural, magnetic and electronic properties of stannite CuFe2-III-VI4 (where III = Al, Ga, In and VI = S, Se, Te) quaternary alloys were investigated using the full-potential augmented plane wave and local states ... -
An ab initio study on the transition path of carbon dioxide at high pressure: evidence for a new intermediate P(4)over-barm2 phase
(Elsevier, 2019)The structural and dynamical behaviour of seventeen solid polymorph of the non-molecular CO2 compound was evaluated using the full potential linear augmented plane wave method (FP-LAPW) in the framework of density functional ... -
Accounting for porous structure in effective thermal conductivity calculations in a pebble bed reactor
(Atomic Energy Society of Japan, 2009)A proper understanding of the mechanisms of heat transfer, flow and pressure drop through a packed bed of spheres is of utmost importance in the design of a high temperature pebble bed reactor. A thorough knowledge of the ... -
Achieving controllable MoS2 nanostructures with increased interlayer spacing for efficient removal of Pb(II) from aquatic systems
(ACS, 2019)The development of new synthesis approaches for MoS2 is necessary to achieve controlled morphologies and unique physicochemical properties that can improve its efficiency in particular applications. Herein, a facile one-step ... -
Achieving energy efficiency with medium voltage variable speed drives for ventilation-on-demand in South African mines
(Elsevier, 2019)The sustainability of the mining industry is contingent on the industry's ability to improve upon the status quo of operational efficiency. The advancement of energy efficient technologies coupled with modern strategies ... -
Acid leaching of heavy metals from bentonite clay, used in the cleaning of acid mine drainage
(SAIMM, 2010)Heavy metals and sulphates in acid mine drainage (AMD) can be adsorbed onto bentonite clay, leaving clean water and a heavy metal loaded clay precipitate as products. Due to the toxicity of heavy metals, the clay could ... -
Action evolution for intelligent agents
(IEEE, 2005)This paper introduces an alternative method of reinforcement learning for intelligent agents. The aim with this method is to closer emulate the natural thought processes of problem solving. This paper only provides a ... -
Activation gap generators in neural networks
(In Proc. South African Forum for Artificial Intelligence Research (FAIR2019), 2019-12)No framework exists that can explain and predict the generalisation ability of DNNs in general circumstances. In fact, this question has not been addressed for some of the least complicated of neural network architectures: ... -
An active hybrid energy storage system utilising a fuzzy logic rule-based control strategy
(MDPI, 2020)The research presented in this paper documents the implementation of an active hybrid energy storage system that combined a battery pack and an ultracapacitor bank. The implemented hybrid energy storage system was used ... -
Active magnetic bearing condition monitoring
(Emerald, 2013)In this paper, condition monitoring of the internal parts of a radial active magnetic bearing (AMB) system is performed by means of Cepstrum analysis, Wigner-Ville Distributions (WVD) and enveloped Equi-Sampled Discrete ... -
Active surface area approximation in a lead-acid cell for optimal performance in renewable energy systems
(IFAC, 2014)In a renewable energy system, lead-acid batteries are required to last as long as possible whilst providing deep discharges and are usually charged in an intermittent manner. This type of operation is severely detrimental ... -
Activity-based risk management for the acquisition of electronic mine safety equipment
(SAIMM, 2017)A new approach is proposed to perform relativistic comparisons between alternative operational risk management solutions by taking into account the impact of each operational activity on overall system performance. ... -
Adaptation behaviour of bacterial species and impact on the biodegradation of biodiesel-diesel
(Brazilian Society of Chemical Engineering, 2017)Two bacteria, namely Bacillus subtilis and Pseudomonas aeruginosa were exposed to different concentrations of diesel to increase their adaptation to the fossil fuel, and were used for the degradation of diesel-biodiesel ... -
Adapting mobile medical information search to low-resourced areas
(IST-Africa, 2013)Providing good medical care in low-resourced areas is a challenge faced by many low and middle income countries. Continuously improving mobile communication infrastructure in these areas is however providing the opportunity ... -
Adapting plant measurement data to improve hardware fault detection performance in pressurised water reactors
(Elsevier, 2012)With the fairly recent adoption of digital control and instrumentation systems in the nuclear industry a lot of research now focus on the development expert fault identification systems. The fault identification systems ... -
Adaptive neural network control of a helicopter system with optimal observer and actor-critic design
(Elsevier, 2018)This paper proposes a methodology for developing an adaptive neural network controller for a simulated helicopter system. Since an indirect adaptive neural network framework is chosen, the controller comprises three ... -
Adsorption and coadsorption of single and multiple natural organic matter on Ag (1 1 1) surface: a DFT-D study
(Elsevier, 2020)The nature of the interaction of low molecular weight natural organic matter (NOM) with the Ag (1 1 1) surface is of crucial importance in the environment. The low molecular weight organics used in this study are formic ... -
Adsorption of Congo Red by surfactant-impregnated bentonite clay
(Taylor & Francis, 2016)Due to an ever-changing climate and invasive foreign plant species increase, South Africa struggles with limited water resources. Water is important for the sustenance of all living organisms and it has to be protected. ...
