Browsing Faculty of Engineering by Title
Now showing items 1081-1100 of 1122
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The use of tracking technology for improved management of trade corridors
(IEEE, 2013)The sub-Sahara African economy is suffering from the inefficient management of trade corridors. Long delays experienced at weigh bridges and border posts are a big contributor towards the slow average movement of freight. ... -
The use of variable speed drives for cost–effective energy savings in South African mine cooling systems
(Elsevier, 2013)An industrial energy efficiency improvement through the introduction of modern technology is an important demand-side management initiative. Cooling systems on South African mines have been identified as large electricity ... -
Using a meta-model to compensate for training-evaluation mismatches
(Southern African Conference for Artificial Intelligence Research, 2020)One of the fundamental assumptions of machine learning is that learnt models are applied to data that is identically distributed to the training data. This assumption is often not realistic: for example, data collected ... -
Using an effective viscosity to account for the effect of the walls on the pressure drop through an annular packed bed
(ASME, 2009)The question arose whether the correlation for the pressure drop prescribed for cylindrical pebble bed reactors by the Nuclear Safety Commission (KTA) of Germany could still be applied to the proposed annular configuration ... -
Using big data for insights into sustainable energy consumption in industrial and mining sectors
(Elsevier, 2018)Human activities related to the production and consumption of energy are negatively impacting the environment and need to be addressed by focusing on cleaner production. With this perspective, this study investigates ... -
Using dynamic model of PEM-Fuel Cell supplying the load by the Z-source inverter with a novel control strategy
(Staff Research Council of Yeshwantrao Chavan College of Engineering (YCCE) , Nagpur, India, 2014)A new dynamic model is developed in this paper to connect PEM Fuel Cell (PEMFC) to a Z-source inverter (ZSI). This model is used to analyse the behaviour of a fuel cell by providing a polarization curve. A controller is ... -
Using information and communication technology to improve the efficiency of African border posts
(IEEE, 2015)African border posts have long been characterized by high levels of inefficiency, resulting in long cross-border delays that hamper the African economy. This partly results from the conflicting objectives of the multiplicity ... -
Using specific energy as a metric to characterise compressor system performance
(Elsevier, 2019)Mine compressed air systems are inefficient and complex to analyse. There is no clear method which can be used to characterise the total performance of the supply side system in terms of the air supplied and energy consumed. ... -
Using summary layers to probe neural network behaviour
(South African Institute of Computer Scientists and Information Technologists, 2020)No framework exists that can explain and predict the generalisation ability of deep neural networks in general circumstances. In fact, this question has not been answered for some of the least complicated of neural network ... -
Using thorium to reduce the maximum fuel temperatures during depressurized loss of coolant accidents in a once-through-then-out (OTTO) PBMR DPP-400 core
(Taylor & Francis, 2017)This article presents the results for the PBMR-DPP-400, but for a once-through-then-out (OTTO) refueling scheme. An optimization attempt of the axial and radial power profiles is reported. The main aim was to reduce the ... -
Using visual texture analysis to classify raw coal components
(IEEE, 2015)Coal ore isn’t a uniform material. In order to optimize the coal liberation process it is necessary to classify a coal ore sample into its constituent components as quickly and cheaply possible. This paper investigates ... -
Utilising fluctuating off-gases more efficiently in a power co-generation environment through less flaring
(IEEE, 2016)Common engineering practice is to generate steam from burnable off-gases, in boiler houses, where excess steam is allocated for power generation after plant requirements are met. If the quantities or chemical composition ... -
The utilization of mobile devices for telemedicine services in a South African public healthcare system
(IOS Press, 2014)The purpose of this study is to develop an understanding in the use of mobile devices in administering telemedicine services within the public health care sector of South Africa. An online questionnaire was developed and ... -
Validating smartphone-collected speech corpora
(SLTU, 2012)We investigate the effectiveness with which the accuracy of a prompted speech corpus can be validated when minimal additional speech resources are available, and specifically when a language model in the target language ... -
Validation of a transient thermal-fluid systems CFD model for a packed bed high temperature gas-cooled nuclear reactor
(Elsevier, 2006)This paper provides an overview of the theoretical basis for a new thermal-fluid systems CFD simulation model for high temperature gas-cooled reactors, contained in the Flownex software code. Flownex provides for detailed ... -
The validation of single point measurements for the localization of multiple harmonic sources
(IEEE, 2010)Power quality management requires inexpensive and simple methods for electric power quality monitoring. This paper investigates the validity of single point measurements for the localization of sources of waveform distortion ... -
Validation of using a modified BET model to predict the moisture adsorption behavior of bituminous coal
(Taylor & Francis, 2016)A good correlation exists between the amount of moisture adsorbed and the oxygen content of medium-rank B vitrinite-rich and medium-rank C inertinite-rich bituminous coal. Total mass moisture adsorbed per gram of coal ... -
Valorisation of waste lignin for phenol derivative compounds using hydrothermal liquefaction
(EUBCE, 2019)Approximately 95% of global phenolic compounds (such as catechol, guaiacol, syringol, and vanillin) used in the pharmaceutical, fragrance and industrial industries are produced from petroleum-based phenolics such as benzene. ... -
Variable kernel density estimation in high-dimensional feature spaces
(Association for the Advancement of Artificial Intelligence, 2017)Estimating the joint probability density function of a dataset is a central task in many machine learning applications. In this work we address the fundamental problem of kernel bandwidth estimation for variable kernel ... -
Variable selection in logistic regression models through the application of exact mathematical programming
(SASA, 2020)A linearised approximation of the log-likelihood objective function is presented as a potential alternative to iterative fitting methods employed by logistic regression. The log-likelihood objective function is solved using ...