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Now showing items 1331-1340 of 1398
Design and evaluation of a vibration ore flow restore machine
(North-West University (South Africa)., 2021)
Ore passes provide a low cost method for gravitational transport of broken ore and waste rock through long vertical distances to lower levels of an underground mine. A hang-up or blockage in an ore pass is undesirable as ...
A comparison of generalization techniques on supervised chess evaluation functions
(North-West University (South Africa), 2021)
This dissertation was created in pursuit of comparing different deep neural network general-ization techniques on neural networks that were trained by supervised optimisation to be used as chess evaluation functions. ...
Classifying recognised speech with deep neural networks
(North-West University (South Africa), 2021)
We investigate whether word embeddings using deep neural networks can assist in the analysis of text produced by a speech-recognition system. In particular, we develop algorithms to identify which words are incorrectly ...
Optimising hydrogen based energy storage systems using super capacitors
(2021)
One of the greatest challenges when it comes to the efficient energy use in unmanned aerial vehicles is that of the energy storage systems. As drones require minimal weight to have optimal mobility the capacity of the ...
Suction recirculation mitigation in a double-suction centrifugal pump
(2021)
Suction recirculation in centrifugal pumps operating at o˙-design conditions is an eventual reality for all centrifugal pumps. Various types of modifications to both the pump impeller and/or volute have been implemented ...
Radiation dose and radionuclide inventory characterization following a hypothetical nuclear criticality accident at a uranium processing facility
(North-West University (South Africa), 2021)
This study focused on a hypothetical nuclear criticality excursion in a Plutonium Uranium Reduction EXtraction (PUREX) processing facility for the recovery of non-irradiated enriched uranium, which are present in scrap ...
Sustainable use of inlet guide vanes to reduce energy consumption of main ventilation fans
(2021)
The rising cost of electricity has urged mines to research and implement new energy-saving
initiatives. Little research has focused on energy saving techniques on main ventilation fans
(MVFs). MVFs extract hot, humid air ...
A cluster-based Bayesian approach to reliable route discovery in large-scale mobile ad hoc networks
(2021)
The application of MANETs have become a central point of focus in the development of wireless networks. However, MANETs still face the challenge of reliable route discovery in large-scale networks under adverse node failure ...
Producing briquettes for domestic household fuel applications from coal tailings
(2021)
Due to the mechanisation of modern mining methods, as well as the breakage experienced in coal beneficiation processes, the coal mining sector of South Africa produces 60 Mt of fine to ultra-fine coal each year. In 2007, ...
Modelling the effect of changes in mining compressed air networks on refuge chambers
(2021)
Health and safety are major talking points in the South African mining sector. Various systems are in place to ensure the safety of all mining personnel underground. One such safety device is refuge chambers. Refuge chambers ...