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 15 of 15 for “"Dispersion analysis"”.
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Dispersion analysis, time parallelization, and GPU autotuning for finite element methods
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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System level dispersion analysis examining program benefits to a low-thrust interplanetary CubeSat from autonomous guidance and navigation
… a closed-loop Linear Covariance (LinCov) analysis was performed to quantify the effects of the guidance and navigation (GN) system on trajectory dispersions for a low-thrust CubeSat in route to entry-interface conditions at Mars. Applicable mission plan concepts, appropriate analysis …
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Nanocomposite Dispersion: Quantifying the Structure-Function Relationship
The dispersion quality of nanoinclusions within a matrix material is often overlooked when relating the effect of nanoscale structures on functional performance and processing/property relationships for nanocomposite materials. This is due in part to the difficulty in visualizing the nanoinclusion …
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Estimating time delays between irregularly sampled time series
… astrophysics literature, such as interpolation, dispersion analysis, discrete correlation function, Gaussian processes and Bayesian method, among others. Instead, this thesis proposes a kernel-based approach to estimating the time delay, which is inspired by kernel methods in the context of …
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Taylor-Aris dispersion in microfluidic networks
… (i) a pair of straightforward examples, dispersion analysis of (non-reactive) pressure-driven flow in spatially periodic serpentine microchannels and reactive transport in an elementary geometric model of a porous medium; and (ii) a pair of case studies based upon the microfluidic …
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Análise do perfil epidemiológico e molecular do SARS-CoV-2 em dois municípios do estado da Bahia entre 2020 e 2022.
… severity, and public health impact. Spatial dispersion analysis of the virus requires consideration of both biological and social factors, such as population density and structural inequalities, and is essential for effective genomic surveillance. In this context, investigating circulating …
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Contributions to the direct time integration in wave propagation analyses
… important attributes of the scheme. We present dispersion properties of the Bathe method and show that its desired characteristics for structural dynamics are also valuable for wave propagation problems. A dispersion analysis using the CFL number is given and the solution of some benchmark …
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Analysis and Application of Coal Seam Seismic Waves for detection of Abandoned Mines
… observed in the synthetic and real field data. Dispersion analysis of the field data shows reasonable agreement with the dispersion characteristics of the synthetic data. Using standard commonly available seismic reflection processing tools, a known and well-mapped mine was detected and located. …
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Radiative heat transfer from aluminum oxide in solid propellant flames
… and temperature were obtained by performing a dispersion analysis. A one-dimensional distributed combustion model was developed to predict the two-phase reacting flow-field above the burning propellant surface. The primary purpose of the distributed combustion analysis was to obtain oxide …
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Finite element characterisation of plasmonic waveguides in terahertz and optical frequencies
… devices. This thesis describes the design, analysis and optimisation of plasmonic devices in optical and terahertz frequencies. A fully vectorial H-field based finite element method has been used in the research reported in this thesis to reveal the modal characteristics of different …
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An Approximation for the Twenty-One-Moment Maximum-Entropy Model of Rarefied Gas Dynamics
… approach to Knudsen layer boundary conditions. A dispersion analysis as well as an investigation of the hyperbolicity of the model is also shown. The Couette flow results are compared against Navier-Stokes and the free-molecular analytical solutions for a varying Knudsen number, for which the …
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Expanding the Palette: Synthesizing Microencapsulated Organic Phase Change Materials in Metallic Matrices for Transient Thermal Applications
… effectively combined the two PCMs after particle dispersion analysis in comparison to the other combination techniques. The physical experiments are validated by computer-modeled simulations. An explicit model of a dynamic system is created to characterize the interactions between the size of the …
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Well-posedness and convergence of cfd two-fluid model for bubbly flows
… flows is analyzed with characteristics, and dispersion analysis. When an incomplete TFM is used, it results in high frequency oscillations in the solution. It is demonstrated through the travelling void wave problem that, by adding the missing short wavelength physics to the numerical TFM, …
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Methods in wave propagation and scattering
… model from noisy samples of the associated modal dispersion curves is considered. In a significant reduction of the complexity of a common inversion methodology, the inner of two nested iterations is eliminated: The approach described does not employ explicit fitting of the data to computed …
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Modeling and design of near-field antennas with periodic structures
… line (ZPSL) is analyzed to obtain its dispersion characteristics. Equivalent circuit models are proposed to characterize the ZPSL structures. A design guideline is developed and demonstrated to enlarge the interrogation zone of a ZPSL loop antenna for near-field wireless systems. Third, …