Browsing Faculty of Engineering by Title
Now showing items 151-170 of 1123
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Collecting and evaluating speech recognition corpora for 11 South African languages
(Springer, 2011)We describe the Lwazi corpus for automatic speech recognition (ASR), a new telephone speech corpus which contains data from the eleven official languages of South Africa. Because of practical constraints, the amount of ... -
Colouring of dolomite, quartzite and dolerite mine dump rocks
(EARET, 2018)For environmental and aesthetic purposes it has become essential that mine dump rocks either blend into the environment or be used in the production of other products. Lately, there has been a constant need to produce ... -
Column leaching of fine coal tailings: impact on environment and thickener operation
(EARET, 2018)The coal mining sector is synonymous with generating large quantities of waste. A comprehensive fraction of the waste is classified as fines (-500 µm) and ultrafine (-100 µm) particles, which accounts eleven per cent ... -
Combination of LiCs and EDLCs with batteries: a new paradigm of hybrid energy storage for application in EVS
(MDPI, 2018)The research presented in this paper proposes a hybrid energy storage system that combines both electrolytic double-layer capacitors (EDLCs) also known as supercapacitors (SCs) and lithium-ion capacitors (LiCs) also known ... -
Combining different computational techniques in the development of financial prediction models
(SCITEPRESS, 2014)The prediction of financial time series to enable improved portfolio management is a complex topic that has been widely researched. Modelling challenges include the high level of noise present in the signals, the need to ... -
Comparative adaptation of B. subtilis and P. aeruginosa in diesel supplemented medium and impact on biodegradation potential
(PSRC, 2014)The degree of diesel blending is likely to influence its toxicity as well as the susceptibility and speed of biodegradation. It is therefore imperative to identify strains that can degrade diesel blend in record time, such ... -
Comparative analysis of brewing wastewater and lactate as carbon sources for microbial community treating acid mine drainage in anaerobic MBBR systems
(Taylor & Francis, 2020)This study investigated the effect of carbon sources (n = 2) on the performance of a microbial community in an anaerobic moving-bed biofilm reactor (MBBR) treating acid mine drainage (AMD). The 1.5 L anaerobic MBBR was ... -
Comparative study of anion exchange membranes for low-cost water electrolysis
(Elsevier, 2020)Various anion-exchange membranes (AEMs) were studied in the electrolysis cell using the non-precious metal-based catalysts showing the good potential of selected AEMs in low-cost water electrolysis application. The 0.1–1 ... -
A Comparative Study of Graph Neural Network Speed Prediction during Periods of Congestion
(SciTePress, 2022)Traffic speed prediction using deep learning has been the topic of many studies. In this paper, we analyse the performance of Graph Neural Network-based techniques during periods of traffic congestion. We first compare ... -
Comparative study of steam vs hot water as primary heat transfer medium for a laboratory scale two-tank heated system
(IEEE, 2019)The need exists for a benchmark multi-domain practical system that could emulate typical process faults for the purposes of condition monitoring. A proposition was made to develop a heated two-tank system, due to its ... -
A comparative study of the processing scheme of chitosan and Nafion 117 in membrane electrode assembly
(Taylor & Francis, 2013)The authors considered two fabrication techniques in the fabrication of the membrane electrode assembly. It was observed that catalytic deposition through electro-spraying was not successful for chitosan and Nafion 117 ... -
A comparative study on fault detection and correction techniques on active magnetic bearing systems
(IEEE-Institute of Electrical and Electronics Engineers, 2007)In this paper, the authors distinguish between three real-time fault detection, correction and identification schemes for vibration forces on the rotor of a rotational active magnetic bearing (AMB) system. Historical fault ... -
Comparing grapheme-based and phoneme-based speech recognition for Afrikaans
(PRASA, 2012)This paper compares the recognition accuracy of a phoneme-based automatic speech recognition system with that of a grapheme-based system, using Afrikaans as case study. The first system is developed using a conventional ... -
Comparing the porosity and surface areas of coal as measured by gas adsorption, mercury intrusion and SAXS techniques
(Elsevier, 2015)In this paper, we compare the surface area, porosity and other physical–structural properties of four bituminous coals from three different coal fields of South Africa determined using carbon dioxide (CO2) and nitrogen ... -
Comparing two developmental applications of speech technology
(Conf. on Human Language Technology for Development (HLTD2011), 2011)Over the past decade applications of speech technologies for development (ST4D) have shown much potential for enabling information access and service delivery. In this paper we review two deployed ST4D services and posit ... -
Comparison analysis of AC PM transverse-flux machines of different designs in terms of power density and cost
(IEEE, 2017)This paper compares four different configurations of PM transverse-flux machines. The permanent magnet transverse flux machines with: internal rotor; outer rotor with magnetic shunts; double coil; and outer rotor without ... -
Comparison analysis of electric motors with two degrees of mechanical freedom: PM synchronous motor vs induction motor
(IEEE, 2016)This paper presents a comparison analysis of two electric motors with helical movement of the rotor. These machines are also referred to as machines with two degrees of mechanical freedom. The machines are designed in such ... -
Comparison between Flownex and CORONA thermal-hydraulic models for a single HTR prismatic fuel assembly
(ANS (American Nuclear Society), 2016) -
A comparison of batch extracted bio-oil and continuous hydrothermal liquefaction bio-oil using spent coffee grounds as biomass feedstock
(EARET, 2018)This study focuses on bio-oil obtained from spent coffee grounds, either by reflux extraction or continuous hydrothermal liquefaction. Spent coffee grounds was chosen as feedstock for this study as it is available around ...