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 41 for “"Spectral parameters"”.
-
Ground Motion Prediction Equations for Non-Spectral Parameters using the KiK-net Database
The KiK-net ground motion database is used to develop ground motion prediction equations for Arias Intensity (I<sub>a</sub>), 5-95% Significant Duration (Ds<sub>5-95</sub>), and 5-75% Significant Duration (Ds<sub>5-75</sub>). Relationships are developed both for shallow crustal earthquakes and …
-
Copper Complexes Which Catalyze the Air Oxidation of Organic Substrates.
… They require a knowledge of pmr and optical spectral parameters. The studies in Part I were carried out to obtain the spectral parameters for future studies.
-
Spectral processing and wind estimation with Jicamarca mesospheric radar data
… in this thesis is an improved method of spectral processing using least-squares nonlinear curve fitting techniques. Using a constrained generalized Gaussian model, the spectral parameters are found for five years of data from Jicamarca's mesosphere-stratosphere-troposphere (MST) radar …
-
Computer-assisted analysis of electron magnetic resonance spectra and the electron nuclear double resonance spectrum of isolated perylene cations
… spectrum involves varying the values of several spectral parameters until the resultant simulation best reproduces the experimental spectrum. Trial-and-error fitting of the parameters is often time-consuming and difficult, limiting the number of spectra which can be simulated. A procedure has …
-
Distribution of Holonomy about Closed Geodesics on Compact Hyperbolic 3-Manifolds
… Selberg's trace formula which relates spectral information to lengths and holonomies of closed geodesics. Then, we show that although holonomy is equidistributed, there is typically a bias in the finer distribution. In particular, we show that a smoothed bias count is distributed …
-
Similarity relations of wind waves in finite depth
… and Donelan et al. (1985) are tested using spectral measurements from Lake St. Clair. Assuming spectral similarity in wave number space relations between the energy, equilibrium parameters and peak wave number are derived. Using a regression analysis, relations are obtained from the data and …
-
A subspace approach to spectral quantification for MR spectroscopic imaging
The problem of spectral quantification for magnetic resonance spectroscopic imaging (MRSI) is addressed in this thesis. We present a novel approach to solving this problem, incorporating both spatial and spectral prior information. More specifically, a new signal model is proposed which represents …
-
Development of multimodal spectroscopy for the detection of vulnerable atherosclerotic plaques
… MMS, the framework of quantitative extraction of spectral parameters, the spectral probes that enable the efficient collection of data, a clinical instrument able to provide real-time diagnosis, and, finally, a clinical implementation of the entire methodology. The motivation for MMS is shown …
-
Interactive Association Between Molecular Structure Spectral Profiles and Nutrient Utilization and Availability of Leaf, Stem, Pods, and Whole Plant Faba Bean Forage in Ruminants Before and After Rumen Incubation
… effect of rumen digestion on the change of its spectral structure and its association to protein and carbohydrate digestion and metabolism characteristics. The faba bean samples used for this research were from three different plots in Yellow Creek, Saskatchewan with 97 days maturity (late pod …
-
Non-invasive detection of oral cancer using reflectance and fluorescence spectroscopy
… Physical models were applied to the measured spectral data in order to extract quantitative parameters relating to the structural and biochemical properties of the tissue. Data collected from healthy volunteers were used to characterize the relationship between the spectral parameters and …
-
Frequency Estimation Using Time-Frequency Based Methods
… these functions can be represented by a set of spectral parameters such as its amplitude, frequency, phase, and the variability of its instantaneous spectral components. The accuracy of these parameters depends on several processing variables such as resolution, noise level, and bias of the …
-
Comets in the near-Earth object population
… Tisserand parameter Tj < 3, comet nucleus-like spectral parameters (generally linear spectra which correspond to C, D, or P taxonomic types), and low (<0.075) albedos. Out of 31 objects we sample having Tj < 3, we find 17 objects or approximately 55% also satisfy these comet candidate criteria. …
-
POWER SPECTRAL ANALYSIS OF SURFACE MYOELECTRIC SIGNALS DURING DYNAMIC CONTRACTIONS
… signals (MES) requires the use of power spectral analysis for effective characterisation. Spectral changes during different types of muscular activity are monitored using spectral parameters like mean power frequency, ratios of powers in several arbitrarily chosen spectral bands and …
-
Phase-and-Defect Diagrams for Polycrystalline Grain Boundary Segregation
… phase, and recent progress has indicated that spectral information, which describes the full distribution of available atomic environments, is required to rigorously understand segregated polycrystalline grain boundaries. However, models proposed prior to this work are primarily thermodynamic …
-
An Investigation of Seismic Reflectivity Spectra, Moments, and Fractal Dimensions
… show that the reflectivity exhibits a range of spectral shapes, from white to blue. The variation is strongly dependent on the sampling rate which has a remarkable effect on the shape of reflectivity distributions, spectra, and designed deconvolution filters. The sample rate dependence of …
-
Polarizing agents for high-frequency Dynamic Nuclear Polarization : development and applications
… orientations between electrons, revealing spectral parameters that explain the improvement of DNP efficiency. Alternatively, radical mixtures of TEMPO and Trityl, methyl tris(8-carboxy-2,2,6,6-tetramethyl-benzo[ 1 ,2-d:4,5-d']bis( 1 ,3)dithiol-4-yl, improve the probability of the correct …
-
Investigation of heart rate variability during sleep apnea
… to investigate the heart rate variability using spectral analysis and time-frequency analysis during sleep apnea. A total of 22 subjects (18 males and 4 females, 49 +/- 20 years) were studied who were experiencing both obstructive sleep apnea and central sleep apnea in whom sleep-disordered …
-
Alkyl, alkenyl and cycloalkyl substituted triphenylmethane dyes
… and isopropyl groups produce somewhat anomalous spectral changes and an explanation is postulated. The preparation of Crystal Violet and Malachite Green derivatives containing meta- isopropyl substituents has enabled the spectral changes resulting from the steric interaction of substituents with …
-
An acoustical study of fricatives in the speech of dysarthric speakers
… vowel syllables. In this thesis, several new spectral parameters from acoustical analysis that reflect neuro motor dysfunctions in production of the fricative /s/ have been devised and are presented. These parameters specify the spectrum shape and relative amplitude of the fricative noise, the …
-
Study of directional ocean wavefield evolution and rogue wave occurrence using large-scale phase-resolved nonlinear simulations
… by JONSWAP spectrum with a broad range of spectral parameters, over large space-time scales. Spectral evolutions, nonlinear wave statistics and rogue wave occurrence are investigated based on the simulated wavefields. The SNOW results are compared to available wave basin experiments and …
Page 1 of 3