Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"statistically designed experiments"”.
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Comparing k Population Means with No Assumption about the Variances
<p>In the analysis of most statistically designed experiments, it is common to assume equal variances along with the assumptions that the sample measurements are independent and normally distributed. Under these three assumptions, a likelihood ratio test is used to test for the difference in …
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Multiscale modeling of thin film deposition processes
… of different additives on the copper deposition. Statistically designed experiments were performed with the rotating disk electrode (RDE) apparatus. A hydrodynamic model was developed for RDE and is used to fit the kinetic parameters that are independent of the transport effect.
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Effect of pattern and coating properties on defect formation in aluminum lost foam castings
… defects in aluminum lost foam castings. Several statistically designed experiments were used to evaluate the effects of various gating designs, aluminum alloy compositions, foam pattern properties, and coating properties. Metal velocity measurements, along with the number, type, and size of …
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Optimisation of plasma sprayed hydroxyapatite coatings
… gained to develop a novel bi-layer coating. Statistically designed experiments (DOE) were used to determine the effect of five process parameters (factors), Current, Gas Flow Rate, Powder Feed Rate, Spray Distance and Carrier Gas Flow Rate, on the coating properties. A screening design was …
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Development of efficient experimental strategies for the cryopreservation of problematic tropical rain forest tree germplasm
… thesis investigates the novel applicability of statistically designed experiments that use less raw materials and can be performed quicker than traditional designs. Taguchi approach was explored for the first time, for the optimisation of cryopreservation protocols. These approaches can save …
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The effects of variables and variable interactions on tin coated drill performance
… lacking in this research has been the use of statistically designed experiments. Traditional experimental techniques in tooling have been conducted under a one variable at a time methodology. The twist drill, however, is one of the most complex metal cutting tools in existence today. Changing …
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Hydrothermal synthesis and optimisation of zeolite Na-P1 from South African coal fly ash
… a statistical approach was adopted to refine the experiments, that was designed to evaluate the interactive effects of some of the most important synthesis variables. In this case, the four synthesis variables; NaOH concentration (NaOH: SiO2 molar ratio ranged between 0.35– 0.71), ageing …