Browsing Faculty of Engineering by Title
Now showing items 556-575 of 1123
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Influence of potassium carbonate on the swelling propensity of South African large coal particles
(ACS, 2015)The swelling propensity of some coals may restrict their use in fixed- and fluidized-bed gasification operations, and effective reduction of swelling can widen the applicability of these coals. Extensive research has been ... -
Influence of reaction atmosphere and solvent on biochar yield and characteristics
(Elsevier, 2014)Sunflower husks were converted to biochar via thermochemical liquefaction in different solvents and reaction atmospheres. Highest biochar yields obtained was 574 g kg−1 husks. Surface area of the produced chars and evolution ... -
The influence of selected biomass additions on the co-pyrolysis with an inertinite-rich medium rank C grade South African coal
(SAIMM, 2015)Co-pyrolysis of four biomass samples (hardwood chip, softwood chip, pinewood chip, and sugarcane bagasse) with an inertinite-rich medium rank C South African coal was investigated. Proximate and ultimate analyses of the ... -
Influence of temperature on the recovery of metal elements from coal ash: FACTSAGE™ simulations
(International Pittsburgh Coal Conference, 2017) -
The influence of the degree of cross-linking on the absorption properties of chitosan beads
(Elsevier Science Limited, 2008) -
The influence of the roof and floor geological structures on the ash composition produced from coal at UCG temperatures
(Taylor & Francis, 2020)The mineralogy of the ash and slag formed at typical UCG temperatures were investigated using a bituminous coal from the Theunissen UCG site in the Free State province of South Africa. The ash and slag samples were produced ... -
Influence of Tm, Ho and Er dopants on the properties of Yb activated ZnTiO3 perovskite: a density functional theory insight
(IOP Publishing, 2018)Ab initio density functional theory calculations were employed to investigate the effect of Tm, Ho and Er substitutional dopants on the electronic and optical properties of Yb activated hexagonal zinc titanate (Yb:ZnTiO3). ... -
The influence of various potassium compound additions on the plasticity of a high-swelling South African coal under pyrolyzing conditions
(Elsevier, 2015)The influence of the anion attached to a potassium cation on the decrease of plastic properties of a high swelling vitrinite-rich medium rank B South African coal was investigated by adding potassium hydroxide (KOH), ... -
An Information Systems Approach to the Proactive Management of Subscriber Identification Modules in Industry
(SAIIE, 2018)The Industry 4.0 paradigm focuses heavily on decentralisation, modularity and interoperability. These principles form the foundation for an effective Industry 4.0 ecosystem. The South African heavy industry still relies ... -
Input parameter ranking for neural networks in a space weather regression problem
(In Proc. South African Forum for Artificial Intelligence Research (FAIR2019), 2019-12)Geomagnetic storms are multi-day events characterised by significant perturbations to the magnetic field of the Earth, driven by so-lar activity. Numerous efforts have been undertaken to utilise in-situ mea-surements of ... -
Insight into the adsorption of a liquid organic hydrogen carrier, perhydro-i-dibenzyltoluene (i ¼ m, o, p), on Pt, Pd and PtPd planar surfaces
(RSC, 2018)Liquid organic hydrogen carriers (LOHCs) are considered to be safe and efficient hydrogen storage media with high hydrogen storage capacities. Adsorption of the LOHC perhydro-i-dibenzyltoluene (i ¼ meta (m), ortho (o), ... -
Insights on hydrogen evolution reaction in transition metal doped monolayer TcS2 from density functional theory calculations
(Elsevier, 2019)The catalytic activity for hydrogen evolution reaction (HER) in monolayer TcS2 has been investigated using vander Waals corrected density functional theory. Also, the influence of transition metal dopants (Fe, Co, Ni, Pd ... -
Insights regarding overfitting on noise in deep learning
(In Proc. South African Forum for Artificial Intelligence Research (FAIR2019), 2019-12)The understanding of generalization in machine learning is in a state of flux. This is partly due to the relatively recent revelation that deep learning models are able to completely memorize training data and still perform ... -
Instrument transformers influence on harmonic measurements for grid code compliance
(IEEE, 2019)With an increased penetration of renewable energy sources in South Africa, especially photovoltaic (PV) and wind farm generating plants, power quality is becoming more important for utilities. With that also the accuracy ... -
An integral CFD approach for the thermal simulation of the PBMR reactor unit
(Elsevier, 2011)A CFD method was developed to conduct integral thermal reactor analysis for the complete Reactor Unit of the Pebble Bed Modular Reactor (Pty) Ltd (PBMR). The requirement was however also to include very detailed aspects ... -
An integrated approach to sensor FDI and signal reconstruction in HTGRs. Part I. Theoretical framework
(Elsevier, 2016)Sensor fault detection and isolation (FDI) is an important element in modern nuclear power plant (NPP) diagnostic systems. In this respect, sensor FDI of generation II and III water-cooled nuclear energy systems has become ... -
An integrated approach to sensor FDI and signal reconstruction in HTGRs. Part II. Case studies
(Elsevier, 2016)This second paper in a two part series presents the application and validation of an integrated approach for sensor fault detection and isolation (FDI) in high temperature gas-cooled reactors (HTGRs) in the form of two ... -
The integrated effect of moderate exercise on coronary heart disease
(Clinics Cardive, 2017)Background: Moderate exercise is associated with a lower risk for coronary heart disease (CHD). A suitable integrated model of the CHD pathogenetic pathways relevant to moderate exercise may help to elucidate this association. ... -
Integrated energy optimisation for the cement industry: a case study perspective
(Elsevier, 2014)Energy costs play a major role in the cement production process. As much as 60% of total cost is allocated to energy and 18% to the consumption of electrical energy. Historically, energy cost savings were achieved by ... -
Integrated procedure for vibration characterization of a magnetic bearing supported rotor delevitation system
(Elsevier, 2016)This paper considers an integrated procedure to verify and validate (V&V) the rotordynamic analyses of a magnetic bearing supported rotor delevitation system (RDS). Rotor-AMB (active magnetic bearing) systems in general ...