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 13 of 13 for “"Mixed potential"”.
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Full-wave analysis of large conductor systems over substrate
… use of full-wave layered Green's functions in a mixed-potential integral equation (MPIE) formulation. Particularly, the choice of implementation for the layered Green's function kernels motivates the development of accelerated techniques for both their 3D volume and 2D surface integrations, where …
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Modeling and design of DC power buses in high-speed digital circuit designs
… concept of partial elements with normalized potential coefficients is developed for general media. A circuit extraction approach based on a mixed-potential integral equation formulation (CEMPIE) is further developed based on partial elements with normalized potential coefficients, to include …
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Fast methods for inverse wave scattering problems
… a fast and accurate method for evaluating the potential integrals in the 3-D mixed-potential integral operator with the Rao-Wilton-Glisson basis function; and (d) optimization with parameterized reduced-order models. The Nyström method and the method to evaluate the potential integrals …
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Modeling aperture radiation for RF interference applications
… on top wall by formulating a pair of coupled mixed potential integral equations (MPIEs). Application of Ewald transform to the computation of Green's function in the cavity yields fast convergence of series summation. Good agreements with a commercial tool, EMC studio, have proved the …
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Modeling chalcopyrite leaching kinetics
… due to passivity encountered at high solution potentials in this system. This highlights the need to investigate better operating conditions to optimize copper extraction and prevent the problem of passivation, and to develop suitable modeling tools to assess and diagnose leaching performance. …
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Localized Corrosion of Friction Stir Welded Magnesium AZ Alloys
… being the lightest engineering alloys, have the potential to replace ferrous and aluminum alloys in structural applications in the transportation sector. Thus far, their use has been limited largely due to challenges associated with their inherently poor corrosion resistance properties, a problem …
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ELECTROCHEMICAL SYNTHESIS OF MAGNETIC MATERIALS FOR MAGNETIC RECORDING AND MEMS APPLICATIONS
… resistance of CoFe films. The corrosion potential dependence on the sulfur incorporation mechanisms in CoFe films was studied via an analytical model based on the mixed potential theory. As bit size decreases, new magnetic sensors that provide high sensitivity and increased …
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Assessment of the corrosion behaviour of alloys 825 and 625 in stagnant seawater-effect of temperature and welding
… across a range of temperatures (30 to 60°C). Mixed potential theory was applied to determine corrosion potentials, rates of corrosion and predict the galvanic effect of coupling alloy 825 to alloy 625 filler metal via welding. Three standard methods were considered to determine the critical …
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Base material electrocatalysts for oxygen cathodes in low temperature acid fuel cells
This thesis investigated the potential use of base material electrocatalysts for the oxygen cathode of a low-temperature acid fuel cell. Pt-based oxygen reduction electrocatalysts have so far been the only materials meeting the requirements of electrocatalytic activity, stability in the acidic …
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An investigation into the relationship between electrochemical properties and flotation of sulphide minerals
… reactions were studied by determining the redox potential changes occurring when various changes were made. These were the length of the alkyl chain length of the xanthate collector, changing the pH or using various chemical reagents to change the potential of the system. It was found from the …
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Porous Silicon as a Proton Exchange Membrane for Direct Methanol Fuel Cells
Direct Methanol Fuel Cells (DMFCs) show the most potential in efficient chemical to electrical energy conversion having approximately half the specific energy compared to gasoline at 5.54 kW-hr/kg (19.9 MJ/kg). With a density of 0.792 kg/L, methanol?s energy density is 4.39 kW-hr/L. By designing a …
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Kinetic Studies of Sulfide Mineral Oxidation and Xanthate Adsorption
… oxidation and reduction. At moderate oxidizing potentials, the rate of reaction is too slow to replenish hydrophilic iron species leaving hydrophobic sulfur species on the surface. However, at higher potentials, iron species are replaced fast enough to depress its flotation. Effects of pH and …