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 238 for “"Physical models"”.
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Discrete, amorphous physical models
Discrete models of physical phenomena are an attractive alternative to continuous models such as partial differential equations. In discrete models, such as cellular automata, space is treated as having finitely many locations per unit volume. Physical processes are modelled by rules that typically …
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Uncertainty quantification and calibration of physical models
… usually described by sophisticated mathematical models. Terrestrial Ecosystem Model (TEM) is one of the ecosystem models, that describes the dynamics of car- bon, nitrogen, water and other vegetation related variables. There are uncertainties in the TEM which are attributed to inaccurate input …
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Predictive Control of HCCI Engines Using Physical Models
… control design and allow for porting of both models and the resulting controllers between different engines, physics-based mathematical models of HCCI are of interest. This thesis presents work on a physical model of HCCI including cylinder wall temperature and evaluates predictive controllers …
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Flow resistance corrections for physical models using unit flowrates
… flow behavior in open-channel hydraulic models. Flow resistance in open channels is commonly characterized by Manning's resistance equation, where a value of Manning's roughness coefficient n, indicates the magnitude of flow resistance. Physical hydraulic models are one method to estimate …
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Synthesis of Local Thermo-Physical Models Using Genetic Programming
Local thermodynamic models are practical alternatives to computationally expensive rigorous models that involve implicit computational procedures and often complement them to accelerate computation for real-time optimization and control. Human-centered strategies for development of these models are …
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Physical Models and Statistical Methods for Understanding Electrochemical Kinetics
… processes. This thesis develops new physical models and applies rigorous statistical methods towards developing a more complete understanding of electrochemical kinetics. The physical models I develop are grounded in the framework of classical statistical mechanics. In Chapter 2, I …
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Voltammetric Methods Augmented with Physical Models and Statistical Inference
… voltammetric routines usually do not leverage physical models, meaning they may perform poorly when confronting conditions not included in training data. In this thesis, I seek to advance voltammetric analyses to evaluate the behavior of degrading RAOs by developing physics-informed protocols …
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Physical models of protein folding within the energy landscape theory
… fast folding experiments as well as minimalist models used in computer simulations.
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Characterising alluvial architecture using physical models, subsurface data and field analogues
… integrated subsurface, field analogue and scaled physical modelling approach to the investigation of the autocyclic and allocyclic controls on braided river morphology and preserved alluvial architecture at both the channel-belt and within channel-belt scales. The prediction of inter-well alluvial …
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Development of physical models for the mesoscopic simulation of gas-surface interactions
This work is focused on the development of physically consistent models for the mesoscopic and macroscopic simulation of gas-surface interactions relevant for hypersonics and high-temperature aerothermodynamic applications. Both nonreactive and reactive interactions are considered with a special …
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Seismic precursor identification method integrating acoustic emission physical models and multi-source data
… and their preparation process shares profound physical homology with the cross-scale damage evolution in materials, from microcrack initiation and propagation to macroscopic instability. Acoustic emission (AE), as stress waves generated by the release of strain energy during rock …
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Physical Models in Community Detection with Applications to Identifying Structure in Complex Amorphous Systems
… solutions for some popular community detection models. It further remains a local measure on weighted and directed graphs. We apply our community detection method to accurately and quantitatively evaluate the multi-scale: "multiresolution") structure of a graph. Our multiresolution algorithm …
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Remote Sensing Big Data and Physical Models for Resilience to Geohazards in the Water-Energy Nexus
… factors rapidly transforms Earth's geophysical systems, posing significant risks to critical infrastructure, ecosystems, and communities. My dissertation tackles two central challenges in geosciences: the climate-driven alterations in geosystems within the water-energy nexus and the …
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Assembly of Life Cycle Inventories using Physical Models and Supervised Learning to support Sustainable Process Development in the Pharmaceutical Industry
… route is estimated based on detailed process models developed in Aspen Plus, and the associated environmental impacts are quantified. A “worst case” GWP of 58 kg CO2-eq./kg product was predicted, and comparative feedstock analysis showed that bio-waste derived β-pinene can be a cleaner …
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A 500kHz-5MHz CW stepped frequency borehole tomographic imaging system
… of Cross-Borehole Tomography. The mathematical physical models of the Radon Transform are reviewed. The entire Cross-Borehole Tomographic process is simulated, based on these physical models of the Radon Transform. The system specifications for the final design are based on the results from the …
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Optimizing hysteretic power loss of magnetic ferrite nanoparticles
… magnetic fields to trends predicted by physical models. By employing integration of hysteresis loops simulated from physical models for single-domain ferromagnets, we have identified ferrite materials optimal for remote heating. Several organometallic thermal decomposition methods were …
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An illuminated workspace for iterative design
… However, these tools lack a means of combing physical and digital representations in order to support the iterative design process. The illuminated workspace provides a self-contained design environment in which a number of physical, computational, statistical, and visual representations can …
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A Computational Framework for Interacting with Physical Molecular Models of the Polypeptide Chain
Although nonflexible, scaled molecular models like Pauling-Corey's and its descendants have made significant contributions in structural biology research and pedagogy, recent technical advances in 3D printing and electronics make it possible to go one step further in designing physical models of …
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Mechanisms of Particle Separation in Aerodynamic Air Cleaning
… could be conducted by comparing different physical models with the assistance of CFD simulations. In CFD simulations, user defined functions were strongly recommended for calculating the particle separation efficiency.
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