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 15 of 15 for “"Frequency methods"”.
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Space/time/frequency methods in adaptive radar
… may be processed with various space, time and frequency techniques. Advanced radar systems are required to detect targets in the presence of jamming and clutter. This work studies the application of two types of radar systems. It is well known that targets moving along-track within a Synthetic …
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Application of Joint Time-Frequency Methods and Artificial Neural Networks for Monitoring Co-Firing Burners
… the Wigner-Ville Distribution (WVD) joint time-frequency method and subsequently classified using a Self-organising Map (SOM). It was found that it was possible to relate the classification of the sensor data to operational parameters such as the burner airflow rate, CO and NOx emissions. Then …
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An investigation of the frequency, methods, objectives, and applications of assessment in Michigan elementary general music classrooms
Thesis (M.Mus.)--Michigan State University. Department of Music Education, 2005
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Fast algorithms for solving integral equations of electromagnetic wave scattering
… compared to those for the classical low frequency methods and have the potential for solving larger electromagnetic scattering problems.
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Towards Multiclass Damage Detection and Localization using Limited Vibration Measurements
Traditional vibration-based damage detection methods provide structural health information based on their measured data (i.e., acceleration and displacement response). Over the last few decades, various model-based and time-frequency methods have shown great promises for damage identification and …
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A Study of MLFMA for Large -Scale Scattering Problems
… on a missile-like target using both high frequency methods and MLFMA. This data was compared and analyzed to determine possible strategies to increase data acquisition speed and accuracy through multiple computation method hybridization.
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Relationship between the autonomic nervous system and the recovering heart post exercise using heart rate variability
… was assessed during rest by obtaining the high frequency (HF) component of the heart rate variability (HRV) frequency spectrum. The recovery time was estimated by fitting an exponential curve to the heart rate post exercise where the exponent was used to calculate the time constant to indicate …
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Psychometric Evaluation of the Timeline Followback for Exercise among Young Adults
… examined test-retest reliability. <strong><em>Methods:</em></strong> Study one participants (<em>N </em>= 66) were college students 20.0 ± 1.4yr. Validity of frequency, intensity, time, and type of exercise as assessed on the TLFB-E was examined using Pearson <em>r</em> correlations with …
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Spatial control of cavitation in therapeutic ultrasound
… near field. In this study, we make use of dual-frequency methods to preferentially lower the cavitation threshold at the focus relative to the rest of the field. One family of dual-frequency driving waveforms is evaluated in a bubble model incorporating rectified diffusion. Theoretical …
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Remote Vibration Estimation Using Displaced Phase Center Antenna SAR in a Strong Clutter Environment
… The ability to estimate the targets vibration frequency and vibration amplitude by exploiting the micro-Doppler e\ufb00ect, all while in a high clutter environment can provide strategic information for target identi\ufb01cation and target condition/status. This thesis discusses one method that …
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The characterisation of multiple defects in components using artificial neural networks
… of the defect in the case of the impact and frequency methods, and the size and distance to the defect in the case of the ultrasonic method. Very good accuracy was observed in all three methods. Experimental validation of the ultrasonic method was carried out, and the ANNs returned accurate …
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Impact of Interruption Frequency on Nurses' Performance, Satisfaction, and Cognition During Patient-Controlled Analgesia Use in the Simulated Setting
… related adverse events. While the nature and frequency of interruptions have been established for nurses* medication processes, the impact of interruption frequency on nurses* PCA interaction has not been fully measured or described. Purpose: The purposes of this study were to quantify the …
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Topics in imbalanced data classification : AdaBoost and Bayesian relevance vector machine
… model would work, but it just applies the frequency methods in a Bayesian framework. This part first proposes a Generic Bayesian RVM classification, which is a pure Bayesian model. We conjecture that our algorithm achieves convergent estimates of the quantities of interest compared with the …
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Microbiological Quality of Ultrasonic Dental Scaler Output Water
… scaler tip activated at a maximum power frequency. Methods: Aseptically-collected water samples were obtained, and neutralized for residual chlorine with sodium thiosulfate, from 12 ultrasonic scalers provided municipal tap water treated with an iodine resin cartridge (Group A), and from …
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Relay Feedback and Multivariable Control
… no right half-plane zeros and a certain high-frequency condition holds, then there exists a diagonal stabilizing feedback that makes a weighted sensitivity function arbitrarily small. Implications on control structure design and sequential loop-closure are given. A novel multivariable …