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 20 of 28 for “"Solution model"”.
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Binary gas adsorption on molecular sieves. Experimental data for the adsorption of oxygen, nitrogen and oxygen-nitrogen mixtures on five molecular sieve adsorbents at various temperatures and pressures and a comparison with theoretical models.
… isotherms has been attempted using the kinetic model of Gonzalez and Holland, the vacancy solution model, the statistical thermodynamic model and a mathematical equation similar to the Hill-de Boer model. With the exception of the kinetic model, good curve fitting was obtained. Binary equilibria …
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Crystal Growth, Phase Transformations, and Electrical Properties of Metastable Gallium Antimonide-Germanium Alloys
… with enthalpies predicted using the regular solution model. The measured carrier concentrations and mobilities were consistent with the materials being disordered.
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Tomographic velocity model building in high-fidelity seismic depth imaging of near surface and VSP settings
… between the raypath distribution and the model parameterization scheme. A reasonable model parametrization is the key to successful tomography applications, especially when the ray coverage is poor and uneven. Motivated by a geologically plausible model parameterization, the multiscale …
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Power Series Solutions to Ordinary Differential Equations
… made aware of methods for finding power series solutions to ordinary differential equations. In the case that a solution to a differential equation may not be expressed in terms of elementary functions, it is practical to obtain a solution in the form of an infinite series, since many …
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Synthesis and Characterization of Titanium Zirconium Based Alloys for Capacitor Use
… leakage current. UTS was fit to a solid solution model which compares well with related literature. Estimates of viscosity for Ti25Zr38Be37 metallic glass were made at various temperatures and resulting surface texturing examined. Long term creep rate change was fit to exponential decay …
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The design, synthesis and properties of pressure-processable biodegradable block copolymers
… biodegradable plastics. The compressible regular solution model (CRS), in combination with group contribution (GC) methods and pressure-volume-temperature (PVT) data, was used to predict the phase behavior and pressure-induced miscibility of several block copolymer systems. Small-angle neutron …
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Adsorption of binary vapor mixtures into solids
… vapor adsorption isotherms with the analogous solution adsorption isotherms indicated that selectivity is generally higher in adsorption from solution. The experimental binary vapor adsorption isotherms were compared to those calculated from the pure vapor adsorption isotherms using the ideal …
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Thermal Analysis of the Detector in the Radiation Budget Instrument (RBI)
… to develop an end-to-end dynamic electro-thermal model, based on first-principles, for the next generation of earth radiation budget instruments, the Radiation Budget Instrument (RBI). A primary objective of this effort is to develop a numerical model of the detector to be used on RBI. …
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Investigating the difficulties of first year mainstream mathematics students at the University of the Western Cape with “related rates” problems
… in section 2.12. The study adopted the same model of the solution of all types of Related Rates that was used by Martin (2000) for the solution of geometric Related Rates problems. In chapter 3 of this thesis, many examples were used to illustrate how the seven step solution procedure of the …
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Multimedia platform framework for the automobile : architectural analysis and proposal evaluation
… order for the automakers to establish a solution, a new framework needs to be established. The automakers are unable to satisfy this market desire through traditional technology delivery strategies, especially given the fast changing and complex interface that currently exists in this …
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Chemistry, design, and processing of two-stage TRIP steel
<p>"A regular solution model was developed to calculate the chemical driving force for α-martensite formation, ΔG<sup>λ→ α</sup><sub>Chem</sub>. A model for the strain energy, ΔG<sup>λ→α</sup><sub>str</sub>, was formulated utilizing the Young’s modulus (E), lattice misfit squared (δ²), and molar …
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Mass Transfer Characteristics of the Submerged Liquid Jet
… jet the best agreement was for a numerical solution of the diffusion equation incorporating experimental values for the jet diameter and interfacial velocity. The penetration theory solution model incorporating either experimental or predicted velocity data showed agreement within 25%. …
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Diffusion and reaction of nitric oxide in cell cultures
… in the body. Accordingly, mathematical models are needed to predict the concentrations of NO and related compounds in cell cultures. A reaction-diffusion model was developed to predict the fate of NO released by activated macrophages attached to microcarrier beads suspended in a stirred …
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Containerless measurement and thermodynamic prediction of the physical properties of liquid steels
… oxygen, and sulfur. Yet, existing literature models for predicting the physical properties of liquid alloys are incapable of accounting for these interstitial species inside an iron lattice. Additionally, direct experimental measurement of these properties is hindered by the requisite high …
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Building Maze Solutions with Computational Dreaming
… and is able to develop and select a simplified model to use during the day phase of computation. Using mazes as an example problem space, a CD simulator is developed and successfully used to demonstrate the viability and robustness of CD. Experiments that focused on CD viability resulted in the …
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Primitive magmas of the Earth and Moon : a petrologic investigation of magma genesis and evolution
… of melts of a primordial lunar mantle. Mixing models are used to reproduce the Apollo 15 green glass compositions. These models are consistent with primordial melts assimilating late stage lunar magma ocean cumulates to produce the green glasses. This provides evidence for the magma overturn …
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Investigation of molten salt electrolytes for low-temperature liquid metal batteries
… cost structure for LMBs via a process-based cost model, identifying key cost levers to serve as filters for system down-selection, and executing a targeted experimental program with the goal of both advancing the field as well as improving the LMB's final cost metric. Specifically, cost modelling …
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Characterization of block copolymers and polymer blends by inverse gas chromatography
… parts to the study. First, the Scott ternary solution model, which is used for the study of thermodynamic interactions in polymer blends, was extended to low molecular weight mixtures. From vapor-liquid equilibrium data in the literature, the Gibbs free energy of mixing of binary mixtures …
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Development of a new database for thermodynamic modelling of the system Na 2 O-K 2 O-Al 2 O 3 -SiO 2
… experimental methods thermodynamic equilibrium modelling is able to generate results within less time at lower costs. In order to perform calculations concerning systems which have a complicated structure and strong interactions between the constituents an adequate thermodynamic model and …
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