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.
Results
Showing 1 to 20 of 63 for “"Non-linear Dynamics"”.
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Non-linear dynamics of mooring lines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997.
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Non-linear dynamics and critical transitions in neonatal brain
Neonatal seizure detection methods have improved the quality of life for new born babies. However, most models suffer from an increased amount of false positive detections that restricts them from being used live in an Neonatal Intensive Care Unit. If the dynamical mechanisms responsible for …
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Non-linear dynamics identification using Gaussian process prior models within a Bayesian context.
… process prior models are known to be a powerful non-parametric tool for stochastic data modelling. It employs the methodology of Bayesian inference in using evidence or data to modify or refer some prior belief. Within the Bayesian context, inference can be used for several purposes, such as data …
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Non-linear dynamics and stock return predictability on the JSE securities exchange of South Africa
… both the APT and the CAPM are single-period linear models based on the assumption that security prices follow a normal strong random walk process or, equivalently, that security returns are normally and linerly distributed. A crucial implication or this assumption is that the prices and …
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Analysis of Ergonomics and Highly Non-linear Dynamics of Surgical Motions and Muscle Activations in Minimally Invasive Surgery
… offers patients when compared to open surgery. Nonetheless, the surge in demand for MIS procedures are not met with commensurate availability of experts in the field, thus leading to excessive stress attributable to increased case load, and an increase in the number of surgery interns requiring …
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Time-series analysis using orthogonal polynomials
Advances in the study of non-linear dynamics have encouraged the construction of models and simulators of non-linear time-series. Researchers in the field of both science and statistics have come up with innovative methods that are useful in extracting information from systems that exhibit …
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Dynamics and control of manipulating robots
Dynamics and Control of manipulating robots currently is a major field of research in robotics. Various methods of efficiently formulating the non-linear dynamics have been proposed with an emphasis on reducing the computations necessary to solve the dynamics. Several control concepts and …
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Multi-GPU Accelerated High-Fidelity Simulations of Beam-Beam Effects in Particle Colliders
… (eRHIC) or LHeC. These simulations model the non-linear collision dynamics of two counter rotating beams in particle colliders for millions of turns. In particular, at each turn, the algorithm simulates the collision of two directed beams propagating at different speeds with different number …
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Neural Network Based Sliding Mode Control for Robotic Manipulator
… disturbances, perturbations, and their coupled non-linear dynamics. This thesis aims to propose a robust control strategy for autonomous robotic manipulation. First, the trajectory tracking problem was introduced and an approach to overcome this issue using a sliding mode controller combined …
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Nonsmooth Dynamics in Two Interacting, Impacting Pendula
… reviews the experimental investigation of a non-smooth dynamical system consisting of two pendula; a large pendulum attached to a frame with an impact wall, and a small pendulum, which shares its axis of rotation with the large pendulum and can impact against the large pendulum. The system is …
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Input-output biomolecular systems
… involved in these reactions. Tools from non-linear dynamics and control theory can be leveraged to analyze and control these systems. In this thesis, we study two key biomolecular networks. In part 1 of this thesis, we study the input-output behavior of signaling systems, which are …
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Low Order Representations in the Turbulent Wake of a Normal Flat Plate
… characterized by quasi-periodic vortex-shedding dynamics, is investigated in the context of low-order modeling, non-linear dynamics and kinetic energy transfer. The flow is characterized, coherent-structures are educed through the implementation of three models, and the transfer of kinetic energy …
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Development of an unsteady state model for the tank bioleaching of sulphide mineral concentrates in flow reactor systems
… rate. Complicating this attempt are a) the non-linear dynamics associated with the kinetics and b) the primary reaction's being multiphase. Mathematical models are developed to establish which particle parameters are necessary to describe reactor performance using the method of segregation. …
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Mathematical modeling of lead climbing falls
… as a mass–spring–damper, incorporating gravity, nonlinear rope stiffness, internal damping, and Capstan-style friction at protection points. The goal is to predict peak forces and rope elongation while capturing the complex dynamics of real climbing ropes. Several novel features are introduced. …
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Modeling, Control, and Hardware Development of a Thrust-Vector Coaxial UAV
… a comprehensive investigation encompassing dynamics modeling, hardware design, and controller development. Using the Newton-Euler method, a dynamic model for the UAV is derived to gain in-depth insights into its fundamental flight characteristics. A simple thrust model is formulated and …
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Quantification of extreme event statistics in ship design
… previous work at the MIT Stochastic Analysis and Non-linear Dynamics (SAND) lab for the quantification of extreme events using wave groups. By separating the event probability from the physics models, we are able to capture rare events in ship motion and loading conditions for a modest …
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Electronic properties of bilayer graphene in a steady magnetic field
… We consider the effect of the magnetic field on non–linear dynamics in the presence of an ac laser field and spatial inversion asymmetry. Bilayer graphene is particularly interesting from this point of view because inversion symmetry can be broken either through asymmetry of disorder, the …
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Bio-mechanical characterisation of synergistic muscle control in goal directed movements
… on multi-joint limbs and characterised by highly non-linear dynamics, requires significant computational effort. The synergistic control hypothesis suggests that the nervous system may simplify the required computations by producing movements through the coordinated activation of a limited number …
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Contribución al seguimiento de móviles con cabezas robóticas y visión artificial
… construction for a monocular tracking system, non-linear dynamics identification and prediction system, and, finally, moving image sequence analysis and segmentation algoríthm. Kinematic model construction for a monocular tracking system is, in general, an un-derdetermined problem. In this …
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Model-based active learning in hierarchical policies
… is still a lack of demonstrations in larger nonlinear systems with discrete and continuous variables. To narrow this gap between industrial practices and academic ideas, we address the problem of designing efficient algorithms to facilitate the deployment of HRL ideas in more realistic …
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