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 18 of 18 for “"Stochastic Resonance"”.
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Enhanced Energy Harvesting for Rotating Systems using Stochastic Resonance
… years. Yet, most of these harvesters are linear resonance-based harvesters whose output power drops dramatically under random excitations. This poses a serious problem because a lot of vibrations in rotating systems are stochastic. In this dissertation, a novel energy harvesting strategy for …
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The role of stochastic resonance and physical constraints in the evolution of foraging strategy
… While foraging, these small aquatic organisms stochastically choose movement parameters with particular levels of variation, or noise, which are similar across several species. Here, related simulations consistently show that these noise levels may be adjusted to maximize foraging efficiency, …
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Synchronization and Signal Enhancement in Nonlinear and Stochastic Systems
… second part of the dissertation is devoted to stochastic resonance. A new theory is proposed to explain both two-state and excitable stochastic resonance. Previous theories explaining the two types of stochastic resonance yield similar results while using different analytic strategies. A …
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Localization, escape rate and delocalization in kinked ratchet potentials
… a proper choice of tilting frequency induces stochastic resonance. Delocalization of a particle is observed in the resonant activation regime.
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Theory of nonequilibrium transport based on a class of chaotic fluctuations
… well as the correspondence between chaotic and stochastic resonance. Moreover, under the condition of free field, we have found interesting connection between the particle dynamics and statistical mechanics, and have uncovered the surprising result that a non-Ornstein-Uhlenbeck deterministic …
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Dynamics of Randomly Perturbed Nonlinear Structural and Mechanical Systems With Resonances
… on the passage of trajectories through the resonance zone. We consider the noisy, periodically driven Duffing equation as a prototypical 1-DOF system and achieve a model-reduction through stochastic averaging. The solution of the reduced model can be approximated by a Markov process. …
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Entanglement and control of quantum states
… temperature of the environment.This stochastic resonance e ffect can be observed in di fferent components of the atomic Bloch vector on exit from the cavity. The third part treats a speci fic problem concerning the characterization of entanglement between two quantum mechanical two-level …
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Magnetic force microscopy studies of mesoscopic superconducting structures
… and dissipation are well-described by a stochastic resonance (SR) of cantilever-driven thermally activated phase slips (TAPS). The SR model allows us to experimentally determine the rate of TAPS and compare it to the Langer-Ambegaokar-McCumber-Halperin (LAMH) theory for TAPS in 1D …
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Noise-Enhanced and Human Visual System-Driven Image Processing: Algorithms and Performance Limits
… the problem of image processing based on stochastic resonance (SR) noise and human visual system (HVS) properties, where several novel frameworks and algorithms for object detection in images, image enhancement and image segmentation as well as the method to estimate the performance limit …
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Enhancement of perception with the application of stochastic vestibular stimulation
… to investigate the potential use of electrical stochastic vestibular stimulation (SVS) as a sensorimotor aid to lower vestibular thresholds and improve manual control. We hypothesized that low-level, subsensory bandlimited white noise (±200 - ±700 [mu]A peak, 52 - 182 ±5% [mu]A RMS) passed …
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The role of noise in brain dynamics processes
… of such phenomena has been referred to as stochastic resonance. With regard to neuroscience, noise can be considered ubiquitous also in the brain processes. Theoretical considerations, as well as a robust experimental evidence, demonstrate its role in many phenomena occuring at different …
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Trapping Sets of Iterative Decoders for Quantum and Classical Low-Density Parity-Check Codes
… the development of novel decoders, we extend the stochastic resonance based decoders to quantum LDPC codes, propose iteration-varying message passing decoders with their message update rules learned by neural networks tuned for low logical error rate, and present a syndrome based generalized …
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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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In vitro and in vivo protein folding under stress
… as a function of thermal noise was seen, a stochastic resonance. The study alluded that correlated noise is a physically and chemically plausible mechanism by which cells could modulate biomolecular dynamics during threshold processes such as signaling. Chapter 6 explores folding competing …
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The Efficacy of Using Color In Sub-Threshold Vibration to Improve Older Adult Balance
The purpose of this study is to investigate (1)the variability of the initial state balance measures within each participant, across different days and within each day, across the participants. (2) the effect of different noise color on the magnitude and the direction of change in the state. (3) if …
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Nichtlineare Dynamik von chemischen Sauerstoff-Oszillatoren
Die vorliegende Arbeit hat zum Ziel, das Antwortverhalten nichtlinearer Reaktionen auf zielgerichtete Störungen zu untersuchen. Dabei beschäftigt sie sich mit zwei nichtlinearen chemischen Sauerstoff-Oszillatoren. Bei den beiden nichtlinearen chemischen Reaktionen handelt es sich um den …
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Noise-induced phenomena of signal transmission in excitable neural models
Meine Dissertation behandelt verschiedene neue rauschinduzierte Phänomene in anregbaren Neuronenmodellen, insbesondere solche mit FitzHugh-Nagumo Dynamik. Ich beschreibe das Auftreten von vibronischer Resonanz in anregbaren Systemen. Sowohl in einer anregbaren elektronischen Schaltung als auch im …