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 10 of 10 for “"Unequally-Spaced"”.
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Adaptive Fourier Analysis For Unequally-Spaced Time Series Data
… all three analysis methods above require equally-spaced time series observations. In this dissertation, by using a sequence of periodic step functions, a new analysis method, adaptive Fourier analysis, and its theory are developed. These can be applied to time series data where patterns may take …
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An iterative technique for shaped-beam synthesis of unequally spaced, nonuniformly excited linear arrays
… technique for the shaped-beam synthesis of unequally spaced, nonuniformly excited linear arrays. The technique requires an initial approximation to the desired radiation pattern. This approximation may be attained by any classical synthesis method. Successive iterations are then applied to …
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Modeling the Progression of Discrete Paired Longitudinal Data.
… have the results of the examination at the four unequally spaced time points spanning over a fourteen year duration.</p>
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Analysis of Growth Curves Under Some Special Covariance Structures
… missing from any occasion, and data observed at unequally spaced time points.</p> <p>Our main results are: (1) derivation of the formulae for the maximum likelihood estimates (MLEs) of the parameters involved, (2) construction of the tests for testing general linear hypothesis of the form …
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Flange bracing requirements for metal building systems
… use of web-tapered members, the potential for unequally spaced or unequal stiffness bracing, combination of bracing types including panel and flange diagonal bracing, and the effects of continuity across brace points. In this research, an inelastic eigenvalue buckling procedure is developed for …
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Em busca de um novo indicador Espectroscópico do período de rotação das Estrelas do tipo solar
… method that makes the time series analysis for unequally spaced data. Observe different rotation periods in the cycles of magnetic activity accounts for a discussion has been debated for many decades. We verified that spectroscopy can also specify the period of stellar rotation, thus being able …
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Directionally Sensitive Sensor Based on Acoustic Metamaterials
… of quarter-wave cavities and an array of equally spaced half-wave open through-cavities. A series of tests were conducted in Virginia Tech's Anechoic Wall-Jet Tunnel where combinations of a wall-bound turbulent jet-flow and a single broadband acoustic source were used to excite the metasurface and …
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Array processing and forward modeling methods for the analysis of stiffened, fluid-loaded cylindrical shells
… shell, a duplicate shell stiffened with four unequally spaced ring-stiffeners and a duplicate ribbed shell augmented by resiliently-mounted, wave-bearing, internal structural elements. Array and signal processing techniques, including source deconvolution, array weighting, conventional …
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Topics in White Dwarfs
… using the technique of power spectra of unequally-spaced data (Deeming,1975). Five oscillation periods were discovered: 350, 192, 143, 113 and 118 seconds. Each of these was found to be amplitude variable. The 192 s oscillation was found to be comprised of a nearly equally spaced triplet …
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Novel Digital Alias-Free Signal Processing Approaches to FIR Filtering Estimation
… to estimate the filter output. Finally, a new unequally spaced Lagrange interpolation-based rule is proposed. The so-called composite 3-nonuniform-sample (C3NS) rule is employed to estimate area under the curve (AUC) of an integrand function rather than the simple Rectangular rule. I then carry …