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 634 for “"Waveforms"”.
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waveforms
… Emergence. The artworks in my thesis exhibition, waveforms, are the physical and conceptual manifestations of life in a non-deterministic universe. They are conceptual and perceptual metaphors for fundamental uncertainty, our relationship to the quantum world and ourselves as emergent beings. The …
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Modeling magnetic core loss for sinusoidal waveforms
Among the challenging unsolved technical problems that have plagued the minds of scientist and engineers throughout the 20th and 21st century is the development of a quantifiable model to accurately estimate or explain Core Power Losses (CPL). Theoretical advances in magnets led to many model …
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Blind Comprehension of Waveforms through Statistical Observations
… cumulant based classification means to identify waveforms for a blind receiver in the presence of time varying channels, which is built from the work done on cumulants in static channels currently in the literature. Results show the classification accuracy is on the order or better than current …
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Cardiac output estimation using arterial blood pressure waveforms
… and can be done continuously as long as ABP waveforms are available. Over a dozen different methods of estimating CO from ABP waveforms have been proposed and some are commercialized. However, the effectiveness of this approach is nebular. Performance validation studies in the past have …
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Enhanced Implementations for Arbitrary-Phase Spread Spectrum Waveforms
… codes to generate sequence-based spread spectrum waveforms is a strong method to improve transmission security, by limiting an observers opportunity to cross-correlate snapshots of the signal into a coherent gain. Such time-varying codes, particularly when used to define multi-bit resolution …
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Quasi-orthogonal wideband radar waveforms based on chaotic systems
… it is now feasible to use arbitrary, wideband waveforms in radar applications. Large sets of quasi-orthogonal, wideband waveforms can be generated so that multiple radars can simultaneously operate in the same frequency band. Each individual radar receiver can process its own return as well as …
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High resolution waveforms suitable for a multiple target environment
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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A Practical Approach to Rapid Prototyping of SCA Waveforms
… the traditional approach of manually developing waveforms are presented.
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A hierarchical approach to automated identification of anomalous electrical waveforms
… capable of digitally recording electrical waveforms. The relationship between events and their recorded waveforms can be exploited for characterization of the power grid’s state over any period of time and facilitating the impact electrical disturbances have on equipment, subsystems, and …
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Risk stratification of ICU patients using arterial blood pressure waveforms
… stratification to Arterial Blood Pressure (ABP) Waveforms. We derive and analyze classifiers based on the morphological distance time series (derived from beat-to-beat morphology changes in the ABP waveform) including ASDNNmd, SDANNmd, rMSSDmd, the MVABP score etc. We also derive and analyze …
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Stepped-frequency pulse train waveforms for improved radar range resolution
… using two stepped-frequency pulse train waveforms, a continuous wave pulse train and a linear frequency modulated pulse train. The continuous wave pulse train consists of a series of single frequency pulses, each at a different frequency. It is found to be susceptible to corruption due to …
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A study of defibrillator waveforms, vectors, and therapies Kevin Anthony Michael.
The defibrillation studies were performed in a porcine model given its resemblance to the human heart and its resilience to repeated ventricular fibrillation inductions (VF) and defibrillations. A novel sequential preshock waveform was assessed in a prototype serial capacitance device. Single and …
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Analysis of single event transients in arbitrary waveforms using statistical window analysis
… of transient anomalies within arbitrary waveforms. The IRES filter convolves time data with a sliding window consisting of a moment-generating function. The resulting time-dependent statistical moments are used to eliminate any steady-state signatures, including noise, and extract …
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New Methods for the Detection and Interception of Unknown, Frequency-Hopped Waveforms
… detection and interception of frequency-hopped waveforms are presented. The first method extends the optimal, fixed-block detection method based on the likelihood ratio to a sequential one based on the Sequential Probability Ratio Test (SPRT). The second method is structured around a compressive …
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Advanced analysis of complex seismic waveforms to characterize the subsurface Earth structure
… Earth structure by analyzing complex seismic waveforms that are recorded on the Earth surface. My first project is body wave analysis of mantle structure under the Calabria slab. Its aim is to better understand the subduction structure of the Calabria slab by analyzing seismograms generated by …
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Determining distributed source waveforms in casual, lossy, dispersive, plane-wave (CLDP) materials
… integral transform relationship applicable to waveforms satisfying the CLDP criterion for that material. The CLDP transform relationship for a lossless/dispersionless material reduces to the (unilateral) Fourier transform. Even without noise, the 'inverse CLDP'-recovered waveform gleaned from …
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Evaluating parameter optimization in locality-sensitive hashing for high-dimensional physiological waveforms
We develop and evaluate a theoretical architecture to inform parameter choice for locality-sensitive hashing methods used towards identifying similarity in physiological waveform time-series data. The goal is to achieve increased probability of successful patient outcomes in emergency rooms by …
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