Browsing Faculty of Engineering by Title
Now showing items 269-288 of 1122
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Direct metal laser sintering, using conformal cooling, for high volume production tooling
(Univ Stellenbosch, 2017)Existing techniques to manufacture conventional tool steel inserts for the plastic injection moulding process are expensive and time-consuming. Complex mould inserts, difficult to manufacture with conventional processes, ... -
A Discourse Model of Affect for Text-to-Speech Synthesis
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2013)This paper introduces a model of affect to improve prosody in text-to-speech synthesis. It operates on the discourse level of text to predict the underlying linguistic factors that contribute towards emotional appraisal, ... -
A discriminative approach to harmonic emission assessment
(IEEE, 2015)With the onset of renewable power sources onto the network, such as Photovoltaic power plants contributing to Total Harmonic Distortion (THD) in voltage, a methodology to quantify their contribution to the THD in voltage ... -
Dispersion of inorganic contaminants in surface water in the vicinity of Potchefstroom
(Elsevier, 2017)Potchefstroom and the neighbouring cities rely mostly on the Mooi River and Vaal River for their water needs. These rivers flow through the gold mining areas and farms, and are therefore likely to be contaminated with ... -
Dissolution kinetics of sorbents and effect of additives in wet flue gas desulfurization
(De Gruyter, 2014)Flue gas desulfurization (FGD) technology has been adopted by a number of power stations for the removal of sulfur dioxide (SO2) from flue gas. The wet FGD system is the most commonly used process because of high SO2 removal ... -
Dissolution kinetics of South African coal fly ash and the development of a semi-empirical model to predict dissolution
(Association of the Chemical Engineers of Serbia AChE, 2015)Wet flue gas desulphurization (FGD) is a crucial technology which can be used to abate the emission of sulphur dioxide in coal power plants. The dissolution of coal fly ash in adipic acid is investigated by varying acid ... -
DNNs as layers of cooperating classifiers
(AAAI Press, 2020-01)A robust theoretical framework that can describe and predict the generalization ability of deep neural networks (DNNs) in general circumstances remains elusive. Classical attempts have produced complexity metrics that rely ... -
Does cancer risk increase with HbA1c, independent of diabetes?
(Cancer Research UK, 2014)Background: The risks for several cancer types are increased in people with diabetes. Hyperglycaemia, hyperinsulinaemia, inflammation and altered hormonal concentrations are common characteristics between the two diseases ... -
Drying of coal fines assisted by ceramic sorbents
(Springer, 2016)It is proposed to introduce contact sorption drying as a method to reduce the moisture content in coal fines. The aim of this study was to investigate the possibility of drying fine and ultra-fine coal using porous ceramic ... -
Drying of fine coal using air in a fluidized bed
(IMPC, 2014)Fluidised bed drying is currently receiving much attention as a dewatering option during the beneficiation of fine (defined here as between 1 mm and 2 mm particles) coal. Apart from concerns about safety and combustion, ... -
Dynamic load-shedding for enhancement of power system stability for the Lesotho 132 kV transmission network
(IEEE, 2019)The transient and dynamic stability are key elements that a system should satisfy to achieve stable system operation [1]. Fault type and location determine the impact that each fault puts on the system and whether power ... -
Dynamic optimisation of deep-level mine refrigeration control
(Stellenbosch Univ, 2018)Artificial cooling remains vital to the deep-level mining industry. This is mainly to ensure a safe underground working environment. Unfortunately, the refrigeration systems of South African gold mines are outdated. ... -
Editor's page
(Wiley, 2019) -
Effect of 3d transition metal substitutional dopants and adatoms on mono layer TcS2 ab initio insights
(Elsevier, 2020)Within the spin polarized density functional theory formalism, the properties (structural, magnetic, electronic and optical) of transition metal (TM) substitutional doping as well as adsorption on monolayer TcS2 has been ... -
The effect of a reduced power quality on the energy efficiency of stand-alone generator systems
(IEEE, 2016)It has already been thoroughly validated that the efficiency of direct online motors is susceptible towards certain power quality parameters such as voltage unbalance or harmonic voltage distortion. It can be assumed that ... -
The effect of acid demineralising bituminous coals and de-ashing the respective chars on nitrogen functional forms
(Elsevier, 2017)An opportunity presented itself to compare changes in nitrogen functional forms brought by the acid treatment of South African bituminous coals and their respective chars. X-ray photoelectron spectroscopy (XPS) was used ... -
The effect of acid washing on the pyrolysis products derived from a vitrinite-rich bituminous coal
(Elsevier, 2015)Extensive characterization of the pyrolysis products, derived from raw and acid washed samples of a vitrinite-rich South African bituminous coal is reported. Pyrolysis experiments were carried out with use of a modified ... -
The effect of added minerals on the pyrolysis products derived from a vitrinite-rich demineralised South African coal
(Elsevier, 2016)A better understanding of the behaviour of the inorganic matter present in coal will assist in more cost-effective operations and more consistency in product yield and composition during thermal processing. In this study, ... -
The effect of aqueous phase recirculation during hydrothermal liquefaction of spent coffee grounds
(EARET, 2018)Batch hydrothermal liquefaction of spent coffee grounds was done in this study. The effect of subsequent diluted aqueous phase recirculation was studied at a constant temperature of 275 °C and residence time of 10 ... -
Effect of biomass feedstock composition on biochar properties produced through hydrothermal liquefaction
(EARET, 2018)The effect that 6 different biomass feedstocks have on biochar was investigated. The biochar was produced through hydrothermal liquefaction at temperatures of 260˚C and 300˚C. The effect of temperature was also investigated. ...