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 19 of 19 for “"Noise mitigation"”.
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Optimizing Quantum Annealing for Trapped Ions: Performance, Resources, and Noise Mitigation
… of the underlying platform, the presence of noise, and the design of the annealing protocol itself. This thesis addresses these challenges along two complementary directions, using trapped-ion hardware based on the Magnetic Gradient Induced Coupling (MAGIC) scheme as a reference architecture. …
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The physics of phase-noise mitigation : signal and filtering using microwave-photonic generation links
… purity of every oscillator system is limited by noise. This thesis explores the physics and measurements of noise fundamental to oscillators operating in the electrical and optical domains. Our analysis leads to a unified theory of phase noise applicable to perturbations whose characteristics are …
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Inductive noise characterization and mitigation techniques for modern computer systems
… of processor power delivery and voltage noise become increasingly difficult to address. This thesis characterizes voltage emergencies and evaluates voltage noise mitigation techniques across a range of processors and power distribution networks. Each processor class has unique design …
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Phase noise effects on OFDM : analysis and mitigation
… One drawback of OFDM is its sensitivity to phase noise. It has been shown that even small phase noise leads to significant performance loss of OFDM. Therefore, phase noise effects on OFDM systems need to be analyzed and methods be provided to its mitigation. Motivated by what have been proposed in …
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Perturbation Solution of Air-Water Mixture for Jet Noise Reduction
<p>This work investigates passive jet-noise mitigation using externally positioned air–water curtains that attenuate radiated sound without altering the underlying jet dynamics. Two classes of multiphase media are examined: a gaseous carrier phase containing dispersed liquid droplets, and a liquid …
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Environmental impact assessment of commercial aircraft operations in the United States
… in per-unit marginal damages. In contrast, noise mitigation is the dominant influence on the value of per-unit marginal damages. Trends in sum damages were found to depend on the growth rates of air transport relative to other source emissions. Growth in air transport emissions outpaced …
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Microperforated Panel (MPP) Absorbers for Impulsive and Narrow-Band Noise Control: Design, Simulation, and Experimental Validation
Environmental noise pollution, particularly in urban and suburban areas, poses a growing threat to public health and quality of life. Among the most challenging forms of such pollution are impulsive and narrow-band noises, which are often tonal, repetitive, and difficult to suppress using …
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High-Resolution Digital Noise Mapping of Urban Environments Using the Spectral Element Method
… necessitates a detailed examination of noise pollution in densely populated areas. Interactions between architectural structures and transportation noise sources, including airways, railways, and highways, make this an intricate problem. Numerous studies have documented the adverse …
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ON THE CONTROL OF OPEN QUANTUM BATTERIES
… while addressing limitations imposed by noise and experimental constraints. These techniques enable critical tasks such as noise mitigation, dynamical shortcut engineering, and measurement optimization, with broad applications in quantum metrology, quantum state engineering, quantum …
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An evaluation of noise reduction strategies at large commercial airports in the United States: A policy analysis and framework classification
<p>Noise pollution from aircraft, specifically in the vicinity of airports as aircraft takeoff and land, is a problem that has been shown to have negative impacts on the welfare of humans, animals, and the surrounding environment. The problem may only become worse as air travel increases for cargo …
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The Analysis and Prediction of Jet Flow and Jet Noise about Airframe Surfaces
Aircraft noise mitigation has been an ongoing challenge for the aeronautics research community. In response to this challenge, aircraft concepts have been developed in which the propulsion system is integrated with the airframe to shield the noise from the observer. These concepts exhibit …
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Aeroacoustics Applications to Jets and Rotors
… This dissertation investigates two key topics: noise suppression in supersonic rectangular jets and rotor noise characterization in hover and ground effect. Using high-fidelity numerical simulations and theoretical analyses, this research aims to develop effective noise mitigation strategies and …
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Proactive voltage droop mitigation techniques for high performance processors
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Design and fabrication of precision carbon nanotube-based flexural transducers
… were investigated. At the system level, a noise model was developed in order to be able to optimize the design of the sensor system. At the element level, a link was established between the structure of the CNT and its gauge factor using a theoretical model developed from quantum mechanics. …
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Signal Detection and Modulation Classification in Non-Gaussian Noise Environments
… in the literature assume that the additive noise has a Gaussian distribution. However, while this is a good model for thermal noise, various studies have shown that the noise experienced in most radio channels, due to a variety of man-made and natural electromagnetic sources, is non-Gaussian …
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On the turbulence-generated sound and control of compressible mixing layers
… mixing layer is a common model used to study the noise generation and mixing characteristics of the near-nozzle region of jets. This work presents three separate but related studies that investigate sound generation and active control for noise mitigation and mixing enhancement of such mixing …
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Enhancing the detection and the reconstruction of gravitational-wave transients in the LIGO-Virgo-KAGRA data using weak assumptions on the astrophysical sources
… astrophysical signals embedded in detector noise, there are two main approaches: template-based and unmodelled searches. The firsts look for GW signals with a time-frequency evolution consistent to the waveform models contained in extensive template banks. Instead, unmodelled or burst …
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Circuits and Modulation Schemes to Achieve High Power-Density in SiC Grid-connected Converters
… modulation (PWM) scheme selection, to set a noise mitigation strategy in the design phase. A three terminal common-mode electromagnetic interference (EMI) model is proposed, which predicts the impact of the dc-dc stage and a large battery-rack on the output CM noise. Based on the model, …
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Optimizing the selection of rumble strip design and construction
… traffic crashes by generating in-vehicle noise for alerting inattentive drivers who are about to leave their travel lanes and/or approach stop-controlled intersections. Despite these safety benefits, they generate external noise levels that often cause disturbance and noise complaints from …