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 69 for “"Dynamical Model"”.
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Asymptotic behavior of optimal velocity dynamical model
DSpace SAF Submission Ingestion Package generated from Vireo submission #17235 on 2022-04-06 at 17:09:50
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A dynamical model of the distributed interaction of intracellular signals
… behavioral modes. In this thesis, a discrete dynamical model is developed to study interactions between certain types of signaling proteins. The model is generic and "connectionist" in nature and incorporates important concepts from the biology. The emphasis is on examining dynamic properties …
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A 2 1/2 dimensional thermohaline circulation model with boundary mixing
A simple quasi-two dimensional dynamical model of Thermohaline circulation (THC) is developed, assuming that the mixing only occurs near western and eastern boundary layers. When the surface density is prescribed, the climatically important quantities, such as the strength of overturning and …
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A 2 1/2 dimensional thermohaline circulation model with boundary mixing
A simple quasi-two dimensional dynamical model of Thermohaline circulation (THC) is developed, assuming that the mixing only occurs near western and eastern boundary layers. When the surface density is prescribed, the climatically important quantities, such as the strength of overturning and …
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Toward improved tropical cyclone intensity forecasts : probabilistic prediction, predictability, and the role of verification
… despite the concurrent advancement of TC modeling and observing capabilities. Given the importance of understanding this situation for the future of TC intensity prediction, the "TC intensity prediction problem" is examined here on two fronts: (1) the role of verification in driving the …
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Exploring lift-off dynamics in a jumping robot
… f0 is generated with a countermovement. A simple dynamical model reveals how optimal lift-off results from non-resonant transient dynamics.
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Prediction under uncertainty : from models for marine-terminating glaciers to Bayesian computation
… understood. Even when a relatively accurate dynamical model is available, computational limitations make it difficult to characterize uncertainties associated with the model's predictions. To address this prediction challenge, this thesis presents complementary developments in glaciology and …
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Mathematical modelling of the development of cyanobacteria (blue-green algae) in an eutrophical lake, including aspects of toxicology
… of a cyanobacterial population is described by a dynamical model which accounts for a number of factors including algal growth, degradation and light driven buoyancy. The work in this thesis describes the development of a cyanobacterial cell buoyancy function which is then used, in conjunction …
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Analysis and control of voltage dynamics in electric power systems
… investigated. A detailed reduced-order machine dynamical model is proposed for more reliable study of voltage-related problems. The main contribution of the analytical work is in recognizing voltage problems as unacceptable operating conditions. Mathematical and operational conditions are …
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Approximations for Singular Integral Equations
… equation component appearing in the complete dynamical model for the elastic motions of a three degree of freedom structure, an airfoil with trailing edge flap, in a two dimensional unsteady flow. The flap can be viewed as an active control surface to dampen vibrations that contribute to …
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Adaptive Inverse Dynamics Control Scheme of Two-Compartment Lung System
… dynamics control technique to a two-compartment modeled respiratory system. Based on the nonlinear respiratory model and desired respiratory volumes, the adaptive inverse dynamics control scheme consisting of a control law and an adaptation law is then applied. The control law has the structure …
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Decoupled Stability Analysis of Power Systems With Slow and Fast Dynamics
… strong and weak interconnections. The system dynamical model belongs to the class of two-time-scale, nonlinear, singularly perturbed systems. Through a near-identity coordinate transformation, the slow and fast dynamics are partially decoupled, allowing for independent stability studies in the …
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Discreet dynamical population models : higher dimensional pioneer-climax models
There are many population models in the literature for both continuous and discrete systems. This investigation begins with a general discrete model that subsumes almost all of the discrete population models currently in use. Some results related to the existence of fixed points are proved. Before …
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Development of Software to Measure the Gravitational Redshift with RadioAstron
… with a relative accuracy of 10^-5. A third-order dynamical model has been implemented to predict frequency shifts in the spacecraft's carrier signal needed to conduct the experiment. The theory behind this model is developed, the software implementation described and third-order effects necessary …
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Studies on the gamma-ray burst phenomenon and on its use to probe the high redshift universe
… well for most afterglows as a simple spectral model, on the other hand the dynamical model of the expansion is difficult to reconcile with the observations. A low dust-to-gas ratio is confirmed. The X-ray radiation during X-ray flares and the initial steep light curve decay phases, is not (or …
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Nanomanipulation modeling and simulation
A novel approach to better model nanomanipulation of a nanosphere lying on a stage via a pushing scheme is presented. Besides its amenability to nonlinear analysis and simulation, the proposed model is also effective in reproducing experimental behavior commonly observed during AFM-type …
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Type-C wind turbine model order reduction and parameter identification
… power, engineers are finding it useful to have models to investigate wind turbine performance. For different applications, an accurate modeling of aerodynamics, power electronics, electrical transients, or control systems are necessary. In other scenarios, these models may be unavailable or …
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Magnetic resonance in amorphous iron-nickel alloys
… the temperature is reduced. We use an improved dynamical model to fit the distorted lineshapes and demonstrate that there is a tendency for the relaxation rate to vanish as is approached. In the Tf spin-glass regime, we also find a shift in resonance position, in addition to the dynamical one, …
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Rydberg series of calcium monofluoride : spectrum, structure, and dynamics
… goal of building a complete structural and dynamical model for the CaF molecule. The quantum defects of the Rydberg series of the molecule, as well as their dependences on the internuclear distance and the collision energy of the outer electron, are determined through a quantum defect theory …
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Dynamics of Cell Fate Decisions Mediated by the Interplay of Autophagy and Apoptosis in Cancer Cells: Mathematical Modeling and Experimental Observations
… analytical framework, we built a mathematical model of cell fate decision mediated by autophagy. The model treats autophagy as a gradual response to stress that delays the initiation of apoptosis to give the cell an opportunity to survive. We show that our dynamical model is consistent with …
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