Browsing Engineering, Built Environment and Information Technology by Supervisor "De Vaal, Philip L."
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Browsing Engineering, Built Environment and Information Technology by Supervisor "De Vaal, Philip L."
Now showing items 1-20 of 29
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(University of Pretoria, 2007-01-12)The aim of this study was to propose a nonlinear multiscale principal component analysis (NLMSPCA) methodology for process monitoring and fault detection based upon multilevel wavelet decomposition and nonlinear principal ...
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(University of Pretoria, 2005-05-18)
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(University of Pretoria, 2018)The ability of a lubricating oil to reduce friction in mechanical surfaces which are in relative sliding motion depends on the base oil behaviour. Previous studies have demonstrated that temperature has a significant ...
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(University of Pretoria, 2010-06-14)Acute liver failure (ALF) is a rare but devastating clinical syndrome with multiple causes and a variable course. The mortality rate is high. Orthotopic liver transplantation is the only therapy of proven survival benefit ...
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(University of Pretoria, 2010)A general overview on biorefineries and cost estimation methods is presented to provide background knowledge needed to create software focused on comparing different biorefinery configurations. The software is implemented ...
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(University of Pretoria, 2007-04-12)Proportional, Integral and Derivative feedback control (PID) is a mature technology responsible for the majority of automated decision making in the process industry. Despite the high reliance on this technology, low levels ...
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(University of Pretoria, 2007-12-20)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2006-12-20)The objectives of this investigation were to: • Develop a capacitance measuring device that can be used for measuring composition of ethanol-water mixtures. • Implement this measurement technique on a laboratory clistillation ...
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(University of Pretoria, 2007-06-26)Synovial joints, like the hip joint, has unique characteristics. In order to study these characteristics by making use of mathematical techniques, it is necessary to develop a model simulating the dynamic forces and joint ...
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(University of Pretoria, 2008-05-07)Please read the abstract (Synopsis) in the section, 00front, of this document
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(University of Pretoria, 2007-10-09)A number of factors have contributed to increased pressure on plant operating efficiency in the chemical processing industry. These factors include more stringent environmental and safety regulations, global economic ...
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(University of Pretoria, 2021)The amphiphilic qualities of plant oils that emerge from their fatty acid makeup lead to improved lubricity. To produce diesel that is friendlier to the environment requires severe hydrotreating, unfortunately the same ...
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(University of Pretoria, 2014)Liquid fuel lubricity testing is known to be sensitive to the humidity of the surrounding atmosphere. The effect reported does however not seem to be universal for all diesel types according to available literature. This ...
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(University of Pretoria, 2015)The SRV test rig was used to evaluate the friction and wear properties of a lubricant in a laboratory setup. Normally, the coefficient of friction and the amount of wear that occurred are measured while the wear scar surface ...
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(University of Pretoria, 2005)Owing to the crippling nature of arthritis, surgeons have been trying for well over a century to successfully treat this debilitating disease particularly when attacking the hip joint. In the early 1970s, Sir John Charnley ...
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(University of Pretoria, 2008-08-06)Energy carriers, such as coal, natural gas and biomass, can be converted by Fischer-Tropsch technology into synthetic crude (syncrude). Fischer-Tropsch derived syncrude can then be refined to transportation fuels, such as ...
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(University of Pretoria, 2011-05-10)In line with Anglo American’s asset optimization and environmental policies, the coal burning flash dryer operations at its smelters have been identified for potential optimization by means of advanced process control. For ...
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(University of Pretoria, 2006-07-20)Automated start–up and shutdown procedures increase the profitability and safety of a process, but are difficult to implement due to the complex nature of the concepts that must be incorporated. Generic components used ...
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(University of Pretoria, 2005-07-05)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2003)The control of batch pulp digesters is hampered by insufficient measurements as well as nonlinearity and weak correlation between consecutive cooks. This makes a model-based approach to control attractive. Due to the age ...
Now showing items 1-20 of 29