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 16 of 16 for “"noise correlation"”.
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Intensity noise correlation in a triply resonant optical parametric oscillator
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Quantum intensity noise correlation in a Type-II phase matched optical parametric oscillator
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Seismic study of the crust and upper mantle structure in eastern Asia using ambient noise correlation and earthquake data
… seismic stations can be retrieved from the cross correlation of diffusive wave field. This method provides additional data coverage to the study region and has been quickly used in various seismic studies. In this dissertation, I develop several tomography methods using traditional earthquake data …
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Imaging the crust and uppermost mantle of north central Alaska using the joint inversion of ambient seismic noise correlation and receiver function
… from the joint inversion of ambient seismic noise correlation and receiver function analysis show a representation of the crustal and uppermost mantle velocity structure in north central Alaska. Due to the lack of station coverage and inhospitable terrain, the structure beneath northern …
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Synchronization via correlated noise and automatic control in ecological systems
… to synchronize nonlinear systems via correlated noise and automatic control. The thesis is divided into two parts. The first part is motivated by field studies on feral sheep populations on two islands of the St. Kilda archipelago, which revealed strong correlations due to environmental noise. …
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Top-Down Control of Lateral Interactions in Visual Cortex
… resulted in increased LFP interactions. Since noise correlations can affect the coding accuracy of a cortical network, we investigated how top-down processes of attention and perceptual task affect V1 noise correlations. We were able to study the noise correlation dynamics that were due to …
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Characterization of a Phased Array Feed Model
… of the PAF requires modeling the signal and noise characteristics of the array, which is a computationally large problem. It also requires accurate modeling of the noise contribution of the receivers connected to the coupled array, which is something that has only recently been understood. …
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Competition between visual stimuli in the monkey parietal cortex
… and show that the activity, reliability, and noise correlation are affected by the context of the monkeys' choice. Finally, we demonstrate how behavioral variables such as the monkeys' performance and saccade latency are modulated during competitive choice.
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Noise Metrology in Optical Communication Systems
… shift. This PhD thesis addresses the problem of noise estimation in optical communication systems. This topic is of critical importance since a better understanding of the optical link is required to optimize the transmission parameters with the final goal of maximizing capacity and enabling …
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Resource Management for Distributed Estimation via Sparsity-Promoting Regularization
… problems.</p> <p>The thesis analyzes how noise correlation affects solutions of sensor selection problems, and proposes both a convex relaxation approach and a greedy algorithm to find these solutions. Compared to the existing sensor selection approaches that are limited to the case of …
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Dynamics of molecular fluctuations in gene regulatory networks
… properties of their internal fluctuations. The correlations between these intrinsic fluctuations then offer, via the fluctuation dissipation relation, the possibility of capturing the system’s response to external perturbations, and hence the nature of the regulatory activity itself. Therefore …
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Feature Topography and Sound Intensity Level Encoding in Primary Auditory Cortex
The primary auditory cortex: A1) in mammals is one of the first areas in the neocortex that receives auditory related spiking activity from the thalamus. Because the neocortex is implicated in regulating high-level brain phenomena, such as attention and perception, it is therefore important in …
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Efficient localization methods for a point source and rigid body
… performance under different sensor number, noise correlation, and localization geometry are examined. We also conduct similar range weighting for squared range difference least squares (SRD-LS and SRD-WLS) under TDOA measurements. In addition, the weighting technique is extended to the …
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On Distributed and Acoustic Sensing for Situational Awareness
… estimation with correlated additive Gaussian noise. In the second part, we employ a single acoustic sensor with co-located microphone and loudspeaker to reconstruct a 2-D convex polygonal room shape.</p> <p>For spectrum sensing, we study the optimality of energy detection that has been widely …
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Multiscale models for structure and dynamics of confined fluids
… question is to understand the role of thermal noise in nanofluidic dynamics and transport. We discuss a combined memory function equation (MFE) and generalized Langevin equation (GLE) based approach (referred to as MFE/GLE formulation) to characterize thermal noise in molecular fluids. Using …
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Earthquake-induced landsliding
… are increasingly surveyed with ambient seismic noise correlations. With seismic noise autocorrelation I computed the seismic velocity in the epicentral areas of three earthquakes where I constrained a change in landslide rate. We found similar recovery dynamics and timescales, suggesting that …