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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 28 for “"dissipative systems"”.
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Linear Discrete-time Dissipative Systems
… is an important unifying concept across systems and control theory, being a generalisation of the concept of energy and the stability methods of Lyapunov. This thesis concerns discrete-time dissipative systems, and its main goal is to present versions of the discrete-time positive real …
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Quantum Control in Dissipative Systems
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-11T20:37:39Z No. of bitstreams: 1 Dong_Ke.pdf: 1438135 bytes, checksum: de88ac169d3325e5c5a1fa36ff31b681 (MD5)
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Dissipative systems theory : analysis and synthesis
… designs for both nonlinear and linear systems. This has renewed interest in the classical concept of dissipative systems. In particular, in various finite gain or passivity system synthesis methods in the literature, one studies a relevant dissipation inequality and looks for an …
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Dissipative systems theory : analysis and synthesis
… designs for both nonlinear and linear systems. This has renewed interest in the classical concept of dissipative systems. In particular, in various finite gain or passivity system synthesis methods in the literature, one studies a relevant dissipation inequality and looks for an …
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Computational Studies in Chemical Quantum Physics
… several aspects of curve crossing phenomena in dissipative systems. A surface hopping model is used to test the qualitative predictions of earlier theories. The simulation results agree well with the qualitative picture. Results are obtained for an alternate semiclassical model based on a vector …
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Geometrical Investigation on Escape Dynamics in the Presence of Dissipative and Gyroscopic Forces
… based on the tube dynamics, will reveal how the dissipative and gyroscopic forces change the phase space structure that governs the escape (or transition) from potential wells. In higher degree of freedom systems, the motion between potential wells is complicated due to the existence of multiple …
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Hamiltonian chaos: from galactic dynamics to plasma physics
… attractors in continuous and discrete-time dissipative systems, extending the application of the method to non-Hamiltonian systems. A key aspect of our work involves analyzing and comparing the performance of the GALI method with the computation of Lyapunov Exponents for non-Hamiltonian …
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Theory and simulations of confined active suspensions
… challenge despite their ubiquity in biological systems. The long-ranged fluid-mediated interactions between suspended particles in the low-Reynolds-number regime are known to give rise to collective motion and large-scale spatiotemporal coherent patterns. The mechanisms behind the emergence of …
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Numerical Case Study of an Atom-Photon Interaction in a Cavity Exploring Quantum Control
… system is given to encourage the study of ME for dissipative systems. Furthermore, we assume that our time-dependent coupling coefficient g(t) can take on two forms, Gaussian and sinusoidal, which are introduced as pulses to study the behavior and response of the cavity. Our results show that ME …
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On variational principles for dissipative networks and systems
Dynamical equations for dissipative systems are in general not derivable from a Lagrangian, but variational principles can nevertheless be formulated using auxiliary variables or a multiplying factor. Both methods are examined, generalized, and applied to some dissipative systems. Composite …
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Pattern formation in systems far from equilibrium
… the dynamics of pattern formation in non-linear, dissipative systems far from equilibrium. The first problem addresses the dynamical mechanism of velocity and shape selection in dendritic crystal growth. Using the boundary-layer model of solidification, we demonstrate the new solvability theory of …
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Nanostructuring of Cu-TiB2 induced by ion irradiation
… for materials used in nuclear reactors. These dissipative systems which exist far from equilibrium pose a challenge in understanding due to the existence of multiple dynamical processes, which are often competing. Recent modeling and experimental results of Cu-base alloys indicate that these …
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Plantwide dynamic operability analysis from network perspective
… plantwide processes based on the concept of dissipative systems and network perspective. An entire large-scale system is represented as a network of smaller sub-systems and their interconnection topology can then be captured explicitly. A distinctive feature of the network perspective lies in …
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Complexity, Emergence, and Self-Similar Organization in River Networks
… generation of a tree topological organization in dissipative systems under the evolutionary dynamics, which is driven by a flow gradient and subject to proximity constraint, that is, the matter and energy can traverse only through a continuum. (3) Statistical self-similar topology is an inevitable …
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Diffusion of light adsorbates on transition metal surfaces
… (ISF) are introduced for open and closed systems. The effects of corrugation and surface-perpendicular motion on the amplitude of different components in the ISF are modelled analytically and compared with simulation. The exact ISF for a particle on a flat surface, obeying the Generalized …
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Early Seeds and Cosmic Skies: Quantum Origins of the Universe and Insights from Large-Scale Structure
… in-in formalism. Here, we show that for non-dissipative systems, we can calculate correlators using the more widely used in-out formalism. In de Sitter space, we achieve this by extending the expanding Poincaré patch with a contracting one. This leads to simplified calculations with fewer …
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Nonlinear interfacial stability of core-annular film flows in the presence of surfactants
… as a paradigm for one-dimensional turbulence in dissipative systems. The surfactant modifies the flow by inducing Marangoni forces along the interface which in turn modify both the velocities and interfacial amplitudes. There are two parameters present in the nonlinear system, the length of the …
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Asymmetric Structures in Systems of Non-equilibrium Bose-Einstein Condensates
… we investigate the nature and applications of systems of interacting Bose-Einstein condensates. The focus of the work is on non-equilibrium condensates that exist within gain-dissipative systems, such as polaritonic or photonic condensates. We first elucidate the nature of an “asymmetric dyad”. …
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Pattern Formation in Rotating Fluid Systems under the Influence of Magnetic Fields
Patterns are observed in many different systems in nature. They are seen in the cloud streets, in sand ripples, in the morphology of plants and animals, on weather maps, in chemical reactions. In all these cases one deals with open, continuous dissipative systems which are driven out of equilibrium …
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