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 “"Daubechies"”.
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Monitoring PC Hardware Sounds in Linux Systems Using the Daubechies D4 Wavelet.
<p>Users of high availability (HA) computing require systems that run continuously, with little or no downtime. Modern PCs address HA needs by monitoring operating system parameters such as voltage, temperature, and hard drive status in order to anticipate possible system failure. However, one …
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Daubechies and quadratic b-spline wavelets for automated early diagnosis of Alzheimer's disease
… the event-related potentials of EEG signals: Daubechies 4 wavelets and Quadratic B-spline wavelets. Analysis was performed using these two types of wavelets and the coefficients obtained from this analysis were then used with several algorithms for automated classification. Cross validation …
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Image Compression by Wavelet Transform.
… of several types of wavelets, including Haar, Daubechies, and biorthogonal spline wavelets are covered and the Enbedded Zerotree Wavelet (EZW) coding algorithm is introduced. The last part of the thesis analyzes the compression results to compare the wavelet types.</p>
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Wavelet Factorization and Related Polynomials
… wavelet transform (DWT) for the algorithms of Daubechies and Sweldens and Mallat. Nearest neighbor lifting is a specific form of the general lifting scheme that improves the lifting algorithm by optimizing the number of efficient memory accesses. Nearest neighbor lifting factorizations are …
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Analysis and techniques for non-intrusive appliance load monitoring.
… investigated in this thesis, two wavelets (Daubechies and Symlets) are able to provide the highest mean classification accuracy.
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A wavelet-based numerical scheme for stochastic mechanics
… to a low primal order perform better than Daubechies wavelets at this task. These observations are used in pursuing the development of Wavelet based Galerkin and Petrov-Galerkin schemes for one-dimensional and two-dimensional stochastic mechanics problems.
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Orthogonal Filters and the Implications of Wrapping on Discrete Wavelet Transforms
… well-known orthogonal filters, namely, the Haar, Daubechies, and Coiflet filters. Subsequently, we analyze the Fourier series that corresponds to each of those filters and recall some important results about the smoothness of the modulus of those Fourier series. We consider a specialized case in …
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Wavelets and wavelet optimized-finite differences for electronic structure calculations
… of space. One-dimensional calculations using Daubechies wavelets as an adaptive basis have been performed, showing that a compressed wavelet basis can determine the eigenvalues of a system with high accuracy using relatively few functions. Using the Wavelet Optimized Finite Difference Method …
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Una nueva aproximación a la multirresolución en el dominio del tiempo (MRTD), basada en la transformada discreta en Wavelets
… técnicas MRTD utilizando funciones wavelets de Daubechies en una, dos y tres dimensiones, haciendo mención a la forma de obtener los coeficientes que forman el desarrollo en wavelets de los campos mediante la transformada discreta en wavelets. También se realiza un análisis exhaustivo de las …
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DNA microarray image processing based on advanced pattern recognition techniques
… by means of CWT at 15 different levels, using daubechies 4 mother wavelet. A summation, point by point, was performed on the processed signals, in order to suppress noise and enhance spot’s differences. Additionally, a wavelet based hard thresholding filter was applied to each signal for the …
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Molecular simulation of liquid crystal polymer flow : a wavelet-finite element analysis
… Due to the localized nature of f under flow, the Daubechies D6 wavelets were used as basis functions for the approximation of f, and resulted in an efficient numerical technique to model LCPs. Bifurcation analysis of the Doi LCP model in shear flow showed that steady state solutions are lost due …
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Time-frequency investigation of heart rate variability and cardiovascular system modeling of normal and chronic obstructive pulmonary disease (COPD) subjects
… the second part of the study, the Morlet, Meyer, Daubechies 4, Mexican Hat and Haar wavelets are used to investigate the heart rate and blood pressure variability from both COPD and normal subjects. The results of wavelet analysis give much more useful information than the Cohen's class …
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A spin on compressive sensing imaging : reticle-based single-pixel imaging system
… final sensing matrix using the GA with the dB1 Daubechies wavelet dictionary in its second decomposition level (2dB1). This was only observed on the ImageNet dataset for optimizing coherence and cumulative coherence. The other dictionaries considered in this work, namely 1dB4, 5dB1 wavelet …
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Jádra schématu lifting pro vlnkovou transformaci
Práce se zaměřuje na efektivní výpočet dvourozměrné diskrétní vlnkové transformace. Současné metody jsou v práci rozšířeny v několika směrech a to tak, aby spočetly tuto transformaci v jediném průchodu, a to případně víceúrovňově, použitím kompaktního jádra. Tohle jádro dále může být vhodně …
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Application of Wavelets to Filtering and Analysis of Self-Similar Signals
Digital Signal Processing has been dominated by the Fourier transform since the Fast Fourier Transform (FFT) was developed in 1965 by Cooley and Tukey. In the 1980's a new transform was developed called the wavelet transform, even though the first wavelet goes back to 1910. With the Fourier …