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 9 of 9 for “"Stability diagrams"”.
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Developing root locus stability diagrams using a personal computer
… specifications is always the problem of system stability at any given speed. A multi-ton rolling stand with uncontrolled oscillations not only destroys the product being rolled but may cause serious damage to the plant and endanger the lives of mill personnel. Therefore stability analysis is …
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Steady State Modeling and Dynamic Analysis of Film Blowing
… dampening the effect of perturbations. Stability diagrams for each material and model show reasonable results, with higher blow-up ratios becoming unstable for all draw ratios.
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Geochemical Analysis of Ironstone Preserved Molluscan Fossils of the Hell Creek Formation (Cretaceous) and Ludlow Member of the Fort Union Formation (Paleogene) of Southwestern North Dakota
… program Geochemist’s Workbench®, in which Eh-pH stability diagrams were created to constrain the geochemical conditions necessary to produce ironstone preservation. </p><p> XRD analyses have identified the current mineralogical composition of the ironstone nodules and fossils as siderite (FeCO3), …
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A fundamental study of the selective hydrophobic coagulation process
… the dispersion and the electrostatic energies. Stability diagrams have been developed from the data, which show that the maximum ζ-potential at which a given coal can coagulate decreases as surface hydrophobicity decreases. For the coagulation of minerals present in coal, the classical DLVO …
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Thermodynamics and electrochemistry of the chalcocite-potassium ethyl xanthate system
… calculations have yielded i) E<sub>h</sub>-pH stability diagrams for different KEX additions, ii) equilibrium concentrations and amounts of all the dissolved and insoluble species including those of CuX and CuX₂, iii) two- and three-dimensional plots showing the effect of E<sub>h</sub> and pH …
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The redox and iron-sulfide geochemistry of Salt Pond and the thermodynamic constraints on native magnetotactic bacteria
… and sulfide are ~31 µM and 3 mM, respectively. Stability diagrams of magnetite and greigite within EH/pH space and measured voltammetric data verify fields of incomplete oxidation resulting in the production of elemental sulfur, thiosulfate and polysulfides. Calculations of the Gibbs free energy …
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Rare Earth Extraction from Clayey Waste Materials by Alkali Pretreatment
… acid (EDTA) was explored by constructing the stability diagrams for La-, Nd-, and Y-PO4-H2O systems, respectively. The simulation results were validated using three coal-based clay samples. The leaching results of both HCl and ammonium sulfate indicated that the pretreatment conducted by …
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Optically injected multi-mode semiconductor lasers
… the automatic identification of their respective stability. The impact of this method is also extended to the detection regions containing bi-stabilities. The second half of the thesis presents an investigation into the origins of Rogue Waves in single mode lasers. After confirming their existence …
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Modeling of mechanisms affecting the growth and breakdown of iron sulfide films
… H2 molecules are detrimental to the mechanical stability of the mackinawite phase and cause localized degradation of the passive film and act as a precursor to pitting corrosion. The final section of the thesis describes the formulation of the multiscale modeling framework that incorporates the …