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 190 for “"Modeling Methods"”.
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Characterizing and modeling methods for power converters
… converter. We focus on the characterization or modeling of the feedback control circuits and critical components in a switching power converter.</p><p>A transient-simulation-oriented averaged continuous-time model is proposed to evaluate the transient output noise of a buck converter. The …
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Modeling methods and die design in extrusion
The process of extrusion consists of placing a cylindrical billet in the cylinder of an extrusion press and forcing the metal through an orifice or die opening having the shape of the desired product. In this work topics in extrusion of industrial interest are considered.
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Modeling methods for merging computational and experimental aerodynamic pressure data
… the wing. Additionally, this effort demonstrates methods to model wind tunnel pressure data as a function of angle of attack as an initial step towards a merging process that uses both location on the wing and flow conditions (e.g., angle of attack, flow velocity or Reynold’s number) as …
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Revealing aromatics formation in combustion using experimental and modeling methods
… of aromatic chemistry. This thesis includes a modeling work for rich natural gas combustion where syngas, ethylene (C₂H₄), and acetylene (C₂H₄) are the valuable products, and aromatics are undesired byproducts. Through high-level quantum chemistry calculations performed in literature and …
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Machine learning surrogate modeling methods in inverse high-speed link design
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Experimental and modeling methods to study radon transport processes in porous media
Radon is a naturally occurring radioactive gas that is produced in the Earth s crust as a result of alpha-decay of radium and is free to migrate through soil, either by molecular diffusion or by advection, and be released to the atmosphere where his behavior and distribution are mainly governed by …
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Advanced Process Design and Modeling Methods for Sustainable and Energy Efficient Processes
… fuels and develop more sustainable and efficient methods to produce commodities. To achieve this goal, new chemical and processing technologies must be developed. It is critical in these early stages of development to identify chemical and processing pathways that are both practical and …
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A new modeling methodology combining engineering and statistical modeling methods : a semiconductor manufacturing application
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Aircraft Multidisciplinary Design Optimization using Design of Experiments Theory and Response Surface Modeling Methods
… While the use of numerical optimization methods is largely successful, the presence of numerical noise in realistic engineering optimization problems often inhibits the use of many gradient-based optimization techniques. Numerical noise causes inaccurate gradient calculations which in …
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Array processing and forward modeling methods for the analysis of stiffened, fluid-loaded cylindrical shells
… thesis investigates array processing and forward modeling methods for the analysis of experimental, structural acoustic data to understand wave propagation on fluid-loaded, elastic, cylindrical shells in the mid-frequency range, 2 < ka < 12. The transient, acoustic, in-plane, bistatic scattering …
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Array processing and forward modeling methods for the analysis of stiffened, fluid-loaded cylindrical shells
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994.
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Comparisons of Hydrogeologic Modeling Methods to Define Capture Zones for Public Water Supply Wells in Northern Arkansas
… of more complex and resource consuming methods for groundwater modeling has been in question since computer based groundwater modeling was established (Anderson, 1992). In many situations, computer modeling of groundwater flow is a necessity and useful for extrapolating data where none …
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Modeling methods for complex manufacturing systems : studying the effects of materials substitution on the automobile recycling infrastructure
… values, and affords extensive auditing. This modeling tool was applied against a real-world case study of the automobile recycling infrastructure. For this system, concerns exist regarding how it will sustain as vehicles continue to decline in mass and change in composition. To reveal this, a …
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Student Success: Approaches to Modeling Student Matriculation and Retention
… of student retention based on four different modeling methods and five different sets of predictors. The four modeling methods are logistic regression, discriminant analysis, structural equation modeling and neural networks. Independent variables include high school performance indices and a …
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Modeling Droplet Impingement Dynamics on Micropillar-Arrayed Viscoelastic Substrates Through Microgeometry-Free and Multiscale Methods
… has been thoroughly investigated by two distinct modeling methods, i.e., microgeometry-free and multiscale modeling methods. The viscoelasticity of the micropillar-arrayed substrate is characterized by a five-parameter generalized Maxwell model via the Laplace-Carson transform. In the …
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Similarity modeling for machine learning
… extent to which two objects resemble each other. Modeling similarity is an important topic for both machine learning and computer vision. In this dissertation, we first propose a discriminative similarity learning method, then introduce two novel sparse similarity modeling methods for high …
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