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 18 of 18 for “"Model Correlation"”.
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Fusion of correlated information in multifidelity aircraft design optimization
Models used in engineering design often face trade-offs between computational cost and prediction uncertainty. To ameliorate this problem, correlated models of varying fidelities are used together under different fidelity management strategies to produce accurate predictions while avoiding …
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Multifidelity methods for multidisciplinary design under uncertainty
… often have available many different simulation models. The output of each model has an associated uncertainty that is a result of the modeling process. This uncertainty is referred to as model discrepancy and is defined as the deviation of the model output relative to the "true" physical value. …
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Nuclear Magnetic Resonance Studies of Catalysts and Model Catalytic Systems: Biochemical and Inorganic Applications (Minerals, Silicon-29, Oxygen-17, Shielding Tensors, Nmr)
A model for the prediction of silicon-29 nuclear magnetic resonance (NMR) chemical shifts in minerals, zeolite catalysts, ceramics and glasses is proposed based on a group electronegativity approach. Based on a total of 99 sites in 51 different compounds, the mean absolute deviation between theory …
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Correlation emergence in two coupled limit order books in the fluid limit
… of two coupled diffusive limit order books to model correlation emergence. The model implements the arrival, cancellation and diffusion of orders coupled by a pairs trader profiting from the mean-reversion between the two order-books in the fluid limit for a Lit order book with vanishing …
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Characterisation and simulation of bidirectional multiphase flow in tubes
… the literature of a generally accepted empirical correlation model that resolves the phenomenon of flow reversal and flooding in vertical tubes for gas / liquid flows with different fluids. Rather, experimental empirical model correlation developed so far relied on air/water flows. This research, …
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Localization of acoustic transients in shallow water environments
… of two parts. First, a time domain propagation modeling code determines the impulse response of the environment from all possible source location to a single hydrophone. This program predicts the signal as it would appear at the receiver from a grid of possible source locations. Second, source …
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Analysis and Optimisation of an Organic Optical Link
… to inform a detailed 5-layer OLED simulation model. Correlation is drawn between the experimental small signal impedance measurements and the experimental luminescent output, from which a novel electrical model is built to predict bandwidth. Extension of the OLED physical simulation shows for …
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Timing Analysis and Behavioral Synthesis with Process Variation
… no longer considered to be deterministic but are modeled as probability distributions. In order to support statistical design, new algorithms and methods are needed. One of the chief problems with process variation is the need for accurate timing analysis in which process parameters such as gate …
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High Precision Thermal Morphing of the Smart Anisogrid Structure for Space-Based Applications
… capability to develop and reduce large dynamic models using the Data Based Loewner-SVD method is demonstrated. This reduction method provides the computationally efficient dynamic models required for evaluation of the concept and the assessment of a vast number of loading cases. Secondly, a …
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Additive Manufacturing in Spacecraft Design and In-Space Robotic Fabrication of Large Structures
… finite element analysis, dynamic testing, and model correlation of AdditiveSat, an additively manufactured small satellite fabricated using FFF. This dissertation also presents the design, analysis, and test results for a passively cooled FFF 3D printer capable of manufacturing parts out of …
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Optimization of Fast MR Imaging Technologies using the Case-PDM to Quantitatively Assess Image Quality
… way. We developed a perceptual difference model, Case-PDM, to quantitatively assess image quality, in a way well-correlated to clinical needs, and demonstrate how the methods can be used to improve MR imaging techniques. We validated existing Case-PDM with advanced observer experiments. …
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Investigating Different Types of Variability in Food Production System
… the effect of variability on the simulation model), correlation analysis (to identify the highest variability factors), and the rule based system (to improve food production system performance based on identified key performance indicators (KPIs)). The research uses a biscuit production line …
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Stochastic Dynamics on Integrable Lattice Models
… new results related to the six-vertex and dimer model. One theme is the construction and analysis of Markov processes which are naturally associated to these lattice models. Certain integrability properties of the six-vertex and dimer model, often related to the Yang–Baxter equation, allow for …
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Model Order Reduction in Structural Mechanics
… welche in der Strukturmechanik als Modellordnungsreduktion bekannt ist. Im Mittelpunkt stehen Kopplungsprozesse von starren und elastischen Mehrkörpersystemen - sowohl in theoretischer Hinsicht als auch bezüglich der praktischen Realisation im Rahmen des Finite-Elemente-Programms …
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Correlations in the one-dimensional Hubbard model
Correlation effects in the one-dimensional Hubbard model are studied by application of the L-resolvent method. The calculations are well beyond one-particle mean field approximation. All correlations involving two neighboring sites are included exactly and higher order correlations are …
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Annuity Product Valuation and Risk Measurement under Correlated Financial and Longevity Risks
… historical data reveal some evidence of strong correlation between mortality and interest rates and must be taken into account when modelling their joint dynamics. In this thesis, we model and examine the impact of nonlinearity and correlation on an annuity product. A regime-switching approach …