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 81 for “"Wind field"”.
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A pragmatic Bayesian approach to wind field retrieval
… on the ocean surface induced by sea-surface winds, and so provides instantaneous snap-shots of wind flow over large areas of the ocean surface, known as wind fields. Inherent in the physics of the observation process is an ambiguity in wind direction; the scatterometer cannot distinguish if …
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Efficient Low-Speed Flight in a Wind Field
… unmanned aerial vehicle which would be flying in winds close to the actual airspeed of the vehicle. An energy modeled NLP formulation was used to obtain results for a variety of missions and wind profiles. The energy constraint derived included terms due to the wind field and the performance index …
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Integrative data-driven approaches to tornado wind field reconstruction
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Near-surface tornado wind field estimation using damage patterns
… are considered the most violent and dangerous wind hazards and are emerging as a major public concern, causing a significant amount of property loss and casualties in the past decades. In response, the engineering community in the United States is implementing tornado-based design in codes and …
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Hierarchical Gaussian models for wind field estimation and path planning
… spatially heterogeneous and time-evolving wind fields [22, 23, 24]. Navigating and planning [26, 25, 28, 12] in wind fields requires reliable and fast predictive models that quantify uncertainty in future wind velocities, and benefits strongly from the ability to incorporate onboard and …
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The wind field at lower levels during a cold outbreak
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1961.
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Non-thunderstorm-related effects on the near-surface wind field in strong tornadoes
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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The relation between the horizontal wind field and height tendencies in an isobaric surface
… to explore the relation between the horizontal wind field, the isobaric surface configuration and the vertical motion of the isobaric surface.
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Satellite derived sea surface temperature and wind field variability in the Benguela upwelling region
… for both the SST and the upwelling favorable wind conditions. Inter-annual variability is common, and with these datasets it was possible to highlight periods of anomalous conditions. Results indicated that both the seasonal and inter-annual variability between the northern and southern parts …
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Validation of CFD Tornado Pressure on Building and Wind Field with TTU Vortex Chamber Measurements
… require accurate estimation of tornado-induced wind loads; however, exhaustive research to estimate the wind loads reliably on buildings during tornadic events is still lacking. Several studies have been carried out to investigate the magnitude of forces induced by tornado winds on buildings …
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Development of designer-relevant Lattice-Boltzmann Wind Field Model for urban canyons and their neighborhoods
Wind field analysis is one of the most important components for designers to achieve a thermally-comfortable and energy-efficient building design. Designers need a fast and relatively accurate wind field model to get integrated into the design workflow, but current platforms to work on are either …
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Observations of the wind field in the first ten meters of the atmosphere above the ocean.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1969.
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Annual and Interannual Variability in the Wind Field and the Hydrography Along the Seward Line in the Northern Gulf of Alaska
… interacting influences of local forcing such as winds, coastal freshwater discharge, eddies, fronts and remote forcing like El Niño-Southern Oscillation. Until now, the influence of winds on the system has been calculated using coarse resolution upwelling index data or spatially sparse buoy data. …
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An analysis of quadrotor flight in the urban canopy layer
… of work concerning quadrotor flight in urban wind fields. The first attempts to characterize a quadrotor's ability to exploit urban wind fields for improved flight performance. A computational fluid dynamics model is used to obtain a wind field estimate given a 3D model of the environment and …
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Heat Storage and Transport Processes in the Tropical Atlantic Ocean
… Key features of the model are the sea level wind field, equatorial upwelling rate and escape transport of the formed warm water out of the equatorial basin.</p> <p>The model wind field is driven by a distribution of vertical velocities at the top of the atmospheric boundary layer. The wind …
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An Implementation of Field-Wise Wind Retrieval for Seawinds on QuikSCAT
<p>Field-wise wind estimation (also known as model-based wind estimation) is a sophisticated technique to derive wind estimates from radar backscatter measurements. In contrast to the more traditional method known as point-wise wind retrieval, field-wise techniques estimate wind field model …
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Risk Assessment and Optimal Response Strategies for Resilience of Electric Power Infrastructure to Extreme Weather
… Firstly, we formulate an asymmetric hurricane wind field model that is applicable to forecasting and large-scale ensemble simulation. The hurricane wind field model incorporates low-wavenumber asymmetries, and its parameters are estimated using a Constrained Nonlinear Least Squares problem. …
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Midlatitude thermospheric wind and temperature: networked Fabry-Perot interferometer observations and radiative transfer modeling
… which estimates thermospheric line-of-sight wind and temperature from raw FPI data. This new algorithm has the advantage over previous work in that it provides accurate temperature estimates and uncertainties. We then present a novel regularization-based technique to estimate the …
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Secondary Eyewall Formation as a Response to Evolving Tropical Cyclone Wind Structure
Secondary eyewalls are rings of strong winds and precipitation that form in many major (Category 3 or higher) tropical cyclones. They often contract, intensify, and replace the primary eyewall of the tropical cyclone in a process known as an eyewall replacement cycle. Eyewall replacement cycles …
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