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 46 for “"noisy environment"”.
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Fractional Diffusion in Gaussian Noisy Environment
Three types of stochastic partial differential equations are studied in this dissertation. We prove the existence and uniqueness of the solutions and obtain some properties of the solutions. Chapter 3 studies the linear stochastic partial differential equation of fractional orders both in time and …
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Robust communication in a time-varying noisy environment
… detect known signal waveforms transmitted under noisy conditions. Moving-average matched filters (MAMF's) are a class of digital filters whose performance is measured in terms of Signal to Noise Ratio (SNR). The overall performance of a MAMF is described by the SNR Improvement (SNRI) which is the …
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Detection of Fast Moving Pulses in a Noisy Environment
… requiring accurate time delay measurements in noisy environments. This general method is then applied to a real system, and the results in terms of detection improvement and rms timing error of the method meet expectations: the signal to noise ratio (SNR) operating point of the system is …
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Support Vector Machines (SVMs) Based Framework for Classification of Fallers and Non-Fallers
… as the assessment of fall risk is linked to noisy environment, it is important to understand the capability of the SVM classifier to effectively address noisy data. Therefore, the robustness of the SVM classifier was also investigated in this study. In summary, the presented work addresses …
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Model reduction of linear and nonlinear systems using balancing methods
… A simple linear system is studied in a noisy environment with noisy sensors and linear balancing techniques are performed. Following, a more complex system in that of a spring-mass system with nonlinear damping is studied using the analysis set forth by J.Scherpen [11] and A.Newman [8]. …
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A Neural Network Receiver for EM-MWD Communication
… to reliably decode the transmitted signals in a noisy environment limits the depth at which EM-MWD systems can operate. Correlation receivers, which are optimal in the presence of additive white Gaussian noise, can be sub-optimal in the presence of various types of field noise at different …
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Detection of arcs in automotive electrical systems
… results in a laboratory simulated arcing environment, and in a vehicle. Suggestions for robust detection in a noisy environment are presented. Keywords: 42v, 42 volt, arcing, automotive, broadband, DC, detection, electric, emissions, harness, phase noise, RF
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5-12 klasių mokinių žinios apie triukšmo įtaką sveikatai /
… specified that they feel worse in the noise environment. Most of the students indicated that it is noisy at school. Such answer was specified by more students of younger age (12-13 years old) in compare with older students and more girls in compare with the boys. About 50 per cent of the …
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Stochastic chaos and thermodynamic phase transitions : theory and Bayesian estimation algorithms
… trapped in a double-well potential coupled to a noisy environment. By use of the classic Langevin and Fokker-Planck equations, we investigate Kramers' escape rate problem. We show that there is a deep analogy between kinetic rate theory and stochastic chaos, for which we propose a novel …
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Application of cepstral techniques to the automated determination of the sound power absorption coefficient
… coefficient by a non-skilled operator in a noisy environment. The results should correlate closely with the standardised impedance tube method, within 0.05 over the range 200 Hz to 2000 Hz. The constraint that the apparatus be usable by a non-skilled operator means that little or no …
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Closed-loop auditory-based representation for robust speech recognition
… be important for human speech intelligibility in noisy environment. We propose that instead of using a fixed filter bank, the filters used in a feature extraction algorithm should be more flexible to adapt dynamically to different types of background noise. Therefore, in the closed-loop model, a …
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Exploration of Alerting Methods on Vest-Worn Systems
… to build and maintain the roadways in highly noisy and dangerous environments. Our goal is to determine what type of alerting method best interrupts the worker, allowing him or her to know that danger approaches. Multiple alerting methods will be compared via reaction time and user data …
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Automated open circuit scuba diver detection with low cost passive sonar and machine learning
… neural network can detect divers in a noisy environment to a range of at least 12.49 m (50 feet).
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Automated open circuit scuba diver detection with low cost passive sonar and machine learning
… neural network can detect divers in a noisy environment to a range of at least 12.49 m (50 feet).
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The emergency transcriber: a situation-aware recording system for noisy acoustic environments
… is intended for emergency teams operating in noisy acoustic environments, where standalone speech recognition systems fail to deliver desired accuracy. Such teams typically follow predefined collaborative workflow as dictated by the relevant engagement protocols, specifying their roles and …
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Investigation of a Correlation Based Technique for Rapid Phase Synchronization in the DVB-S Standard
… word is to improve the standard in high noise environments. A two byte sync word provides more known information for correlation. The resulting correlation peaks are double that of when a single byte is used; this corresponds to about a 3 dB increase in SNR to provide fast signal acquisition …
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Advances in the Use of Finite-Set Statistics for Multitarget Tracking
… challenges due to factors, such as, clutter/environmental noise, joint target and sensor state dependent measurement uncertainty, target-measurement association ambiguity, and sub-optimal sensor placement. The specific application that we consider is that of an underwater mobile sensor that …
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Effect of Zolpidem, Zaleplon, and Ramelton on cognitive functioning after awakening from napping
… in circumstances not ideal for rest (shift work, noisy environment, short period available during the day, etc.). Because these three drugs have a rapid onset and short half-life (one hour for zaleplon, 2.5 hours for zolpidem and 2.5 hours for ramelteon), they have the potential to be utilized in …
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Robust Unconstrained Face Detection and Lip Localization Using Gabor Filters
… ASR system performance degrades when employed in noisy environments such as moving vehicles. To improve system performance under these conditions, visual speech information can be incorporated into the ASR system, yielding what is known as audio-video speech recognition (AVASR). A majority of …
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Development of a robot localization and environment mapping system
… designed in this work can collect data about the environment and track the robotic inspection platform, recording the defect locations. It consists of a two axis gimbaled sensing platform with a single point distance sensor placed in the manhole of the tank. A collection of algorithms were …
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