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 20 of 132 for “"signal analysis"”.
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Acoustic emission signal analysis
… identification of probable source mechanisms for signals emitted during the failure of metals. This was achieved through the construction of a unique instrument and the development of special computer programs. The instrument permitted wideband digital waveform recordings to be made of both …
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Interactive tools for sound signal analysis
… model for speech and sound waveform analysis and synthesis. This sinusoidal representation model can also be used for a variety of sound signal transformations such as time-scale modification and frequency scaling. The above sound analysis/synthesis sinusoidal representations and …
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Active filters for biological signal analysis
A way to handle biological signals by dividing the signals into bands in the frequency domain is the subject of this paper. Several filters were constructed and the results of a particular filter were analyzed. The problem of obtaining a constant power spectrum when a signal is divided into a …
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Bio-Signal Analysis for Personalized Pilot Training
… may manifest as changes in certain physiological signals as pilots of differing experience levels are over, under, or adequately challenged in a given task. This thesis analyzes the effectiveness of measured elecrodermal activity (EDA) and electromyography (EMG) signals to indicate trends in pilot …
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Small-signal analysis of parallel power converters
A small-signal analysis and modelling approach is developed for parallel power converter modules. The small-signal model of parallel buck converter modules is developed in detail to demonstrate the modelling approach. It is shown that a multiple power converter module system can be reduced to an …
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Statistical methods for biomedical signal analysis and processing
… two powerful analytical frameworks for analyzing signals and developing efficient processing and classification algorithms. In this thesis, these frameworks are applied for modelling and processing biomedical signals in two different contexts: ultrasound medical imaging systems and primate neural …
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Spatio-temporal fMRI signal analysis using information theory
… The development of automatic statistical analysis techniques which calculate brain activation maps from JMRI data has been a challenging problem due to the limitation of current understanding of human brain physiology. In previous work a novel information-theoretic approach was introduced …
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SIGNAL ANALYSIS AND RADIOHOLOGRAPHIC METHODS FOR AIRBORNE RADIO OCCULTATIONS
… in propagation direction and delay of the GPS signal to measure refractivity, which provides information on temperature and humidity. The GPS-RO technique is now operational on several Low Earth Orbiting (LEO) satellite missions. Nevertheless, when observing localized transient events, such as …
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MICA workspace : a symbolic computational environment for signal analysis
… is a numeric and symbolic environment for signal analysis. The main component is a new symbolic mathematics engine. Some features of this engine include symbolic integration and differentiation, tensor manipulation with algorithms such as singular value decomposition, expression …
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Surface myoelectric signal analysis and enhancement for improved prosthesis control
In this thesis, novel signal processing and machine learning techniques are presented in the field of myoelectric control. Specifically, algorithms for activity detection, noise identification and noise reduction are introduced, evaluated and discussed. The ultimate aim has been to develop …
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Random Input Signal Analysis of Nonlinear Systems With Transport Delay
Made available in DSpace on 2014-12-08T22:24:46Z (GMT). No. of bitstreams: 1 7013326.pdf: 1698913 bytes, checksum: f8df86df5d4d5eec22e2cdc5c0a97a69 (MD5) Previous issue date: 1969
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Non destructive structure evaluation : an application of seismic signal analysis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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Small signal analysis of nonlinear systems with periodic operating trajectories
A new method for small-signal analysis of switching power converters is developed and implemented in a computer program. The method is derived for systems where the nonlinearities can be described by elements that can take on one of two values, based upon a controlling variable. Another requirement …
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Small-signal analysis and design of a distributed power system
A small-signal analysis of a two-stage distributed power system is performed. Although the distributed power system is composed of conventional PWM converters, the analysis methods can be extended to systems using other converter topologies. The analysis focuses on two important features of a …
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Damage classification in reinforced concrete beam by acoustic emission signal analysis
… during monitoring. The need for effective data analysis in grading system can be linked into the three main objective of this research; (a) determine the grading system; (b) identify and discriminate the AE data parameter ; (c) and validate a new standard grading system for severity assessment. …
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Online partial discharge detection and signal analysis for high voltage cables
… of PD through the interpretation of measured signals. Presented in this Thesis are presented novel contributions to the area of online PD detection for underground HV cables. The work encompasses aspects of physical data acquisition procedures and the post-processing signal processing …
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Application of signal analysis techniques to cardiac arrhythmia detection and classification.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Improvement of Signal Analysis for Surrogate Bedload Monitoring at Sediment Bypass Tunnels
付記する学位プログラム名: グローバル生存学大学院連携プログラム
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Small-signal analysis of the phase-shifted zero-voltage switched PWM converter
… the converter dynamics are analyzed. The small-signal model is derived incorporating the effects of phase-shift control and the utilization of transformer leakage inductance and power FETs junction capacitances to achieve zero-voltage resonant switching. The thesis explains the differences in …
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