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 729 for “"chaotic"”.
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Optimisation of chaotic thermoacoustics
… nonlinear thermoacoustic oscillations can be chaotic. In this thesis, we develop strategies to analyse and minimise chaotic acoustic oscillations, for which traditional stability and sensitivity methods fail. We investigate a prototypical thermoacoustic system in which chaotic oscillations …
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Eigenfunctions in chaotic quantum systems
… articles on eigenfunctions in systems with fully chaotic dynamics and systems with a mixed phase space is summarized. Of particular interest are statistical properties like amplitude distribution and spatial autocorrelation function and the implication of eigenfunction structures on transport …
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Transport in chaotic magnetic fields
… helical magnetic field, whose field lines are chaotic over the entire space. In this thesis, we examine the transport properties of magnetic field lines and particles in three related systems: the sine field, the sine field superimposed with a constant background field, and a time varying sine …
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The chaotic obliquity of Mars
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1993.
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Chaotic motions of nonlinearly moored structures
… the theoretical and numerical aspects of the chaotic motions of offshore structures with nonlinear moorings. As one such example, Aoki, Sawaragi and Isaacson (1993) described the numerical simulation of the motions of a single degree of freedom system with a piecewise-linear restoring force …
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Chaotic diffusion in nonlinear Hamiltonian systems
… in such systems is induced by the intrinsic chaotic behavior of trajectories and thus is called chaotic diffusion''. Its properties are studied on the example of one- or two-dimensional lattices of harmonic or nonlinear oscillators with nearest neighbor couplings. The fundamental observation …
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Group integrals in chaotic quantum systems
… random matrix (GOE or GSE) modelling the chaotic admixture. We prove that in ordinary space the recursion formula is an integral solution of a Hamiltonian system related to Calogero--Sutherland models for arbitrary coupling beta>0. We calculate closed expressions for some group integrals …
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Chaotic behaviour of disordered nonlinear lattices
In this work we systematically investigate the chaotic energy spreading in prototypical models of disordered nonlinear lattices, the so-called disordered Klein-Gordon (DKG) system, in one (1D) and two (2D) spatial dimensions. The normal modes' exponential localization in 1D and 2D heterogeneous …
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Parameter estimation in chaotic time series
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Estimation and detection with chaotic systems
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Musical variations from a chaotic mapping
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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The observed chaotic rotation of Hyperion
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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Channel equalization for self-synchronizing chaotic systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Neural Closure Models for Chaotic Dynamical Systems
… modeling, is that these dynamical systems are chaotic in nature. A hallmark of chaotic dynamical systems is that they are highly sensitive to small perturbations in the initial conditions and parameter values. As a result, even the best physics-based computational models, often derived from …
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Active Transport in Chaotic Rayleigh-Bénard Convection
… questions remain for transport in complex and chaotic flows. This thesis investigates the active transport in a three-dimensional, time-dependent flow field characterized by a spatiotemporally chaotic state of Rayleigh-Be?nard convection. A nonlinear Fischer-Kolmogorov-Petrovskii-Piskunov …
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DOUBLE PENDULUM CHAOTIC MODEL FOR PSEUDORANDOM NUMBER GENERATION
… to the first mass. The double pendulum exhibits chaotic motion under the influence of an external force such as the gravitational force. The chaotic motion is sensitive to the initial conditions or positions of the masses, resulting in an infinite number of possible motion paths. The chaotic …
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CUPOLETS: Chaotic unstable periodic orbits theory and applications
… work suggests that periodic orbits of chaotic systems are a rich source of qualitative information about the dynamical system. The presence of unstable periodic orbits located densely on the attractor is a typical characteristic of chaotic systems. This abundance of unstable periodic …
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Learning and memory in chaotic spiking neural models
… tasks. This has been done in the context of chaotic spiking neural networks (CSNNs). Chaos provides many interesting properties that can be used to achieve computational tasks. Such properties are sensitivity to initial conditions, space filling, control and synchronization. Biological …
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