I perform comprehensive comparison of the standard realised volatility estimators including a novel wavelet time-frequency estimator (Barunik and Vacha 2012) on wide variety of assets: crude oil, gold and S&P 500. The wavelet estimator allows to decompose the realised volatility into several investment horizons which is hypothesised in the literature to bring more information about the volatility time series. Moreover, I propose artificial neural networks (ANN) as a tool for forecasting of the realised volatility. Multi-layer perceptron and recursive neural networks typologies are used in the estimation. I forecast cumulative realised volatility on 1 day, 5 days, 10 days and 20 days ahead horizons. The forecasts from neural networks are benchmarked to a standard autoregressive fractionally integrated moving averages (ARFIMA) model and a mundane model. I confirm favourable features of the novel wavelet realised volatility estimator on crude oil and gold, and reject them in case of S&P 500. Possible explanation is an absence of jumps in this asset and hence over-adjustment of data for jumps by the estimator. In forecasting, the ANN models outperform the ARFIMA in terms of information content about dynamic structure of the time series.

M.Ing. / With the increased use of nonlinear loads such as variable speed motor drives and rectifiers, the voltages and currents on the power system grid are no longer sinusoidal. These non-sinusoidal waveforms cannot be analyzed by conventional power theories and the usual recourse is to decompose the nonlinear waveform into a set of harmonics. Harmonic voltage and current components are detrimental to the power system and may cause additional losses, or premature failure of equipment, and as such they have a definite influence on the quality of supply. This thesis shows the limitations and potential pitfalls of harmonic decomposition and other power theories, and examines various methods used for identifying, quantifying and modelling nonlinear loads. The aim of the thesis is to evaluate methods for attaching a specific disturbance or non-linearity on the voltage waveform to a specific load connected at the point of common coupling. The power theories examined include the total complex power, the IEEE working group definitions of apparent power, true power factor and harmonic adjusted power factor. Some new techniques for estimating the degree to which a load is disturbing the voltage at the point of common coupling is introduced, including the calculation of correlation indices, and the the use of wavelets.

This thesis introduces a novel method for accurate pitch detection and speech segmentation, named Multi-feature, Autocorrelation (ACR) and Wavelet Technique (MAWT). MAWT uses feature extraction, and ACR applied on Linear Predictive Coding (LPC) residuals, with a wavelet-based refinement step. MAWT opens the way for a unique approach to modeling: although speech is divided into segments, the success of voicing decisions is not crucial. Experiments demonstrate the superiority of MAWT in pitch period detection accuracy over existing methods, and illustrate its advantages for speech segmentation. These advantages are more pronounced for gain-varying and transitional speech, and under noisy conditions.

A análise de sinais mioelétricos provenientes do tubo gastro-intestinal de animais de laboratório (ratos), conseguidos por meio de eletrodos cronicamente implantados, é peça-chave no entendimento das desordens associadas ao sistema digestivo. Esta análise enfrenta consideráveis dificuldades quando realizadas por métodos clássicos, em especial os baseados na transformada de Fourier. A interação de várias componentes mioelétricas torna muito complicado e trabalhoso o acompanhamento destes sinais ao longo do tubo digestivo e a obtenção de parâmetros típicos como a velocidade de propagação entre eletrodos. Estuda-se aqui uma alternativa mais nova e promissora: a transformada Wavelet. Utilizando esta ferramenta matemática, torna-se possível obter uma melhor resolução tempo-freqüencial dos sinais estudados, permitindo encontrar padrões referentes à propagação do sinal mesmo em leituras ruidosas e compostas de várias freqüências. Foram analisados 82 leituras de 9 animais normais do Laboratório de Investigação Médica da Faculdade de Medicina da USP, sendo possível determinar dois parâmetros: a velocidade de propagação média entre eletrodos (cerca de 1.2 cm/s) e as componentes principais da freqüência basal (0.63 e 0.65 Hz). / The analysis of myoelectric signals from the gastro-intestinal tube of laboratory animals (mice), recorded by chronically implanted electrodes, is a key stone in understanding the disorders associated to the digestive system. This analysis meets considerable difficulties when done by classical methods, specially those based in the Fourier transform. The many myoelectric components interactions makes the following of these signals along the digestive tract and the retrieval of typical parameters (such as the propagation velocity between electrodes) a very complicated and laborious task. Here is studied a newer and more promising alternative: the Wavelet transform. Using this mathematical tool, it becomes possible to obtain a better time-frequency resolution of the studied signals, allowing to find patterns related to the signal propagation even in noisy and multifrequencial readings. 82 readings from 9 normal animals belonging to the Medical Investigation Laboratory of the Medicine Faculty of University of São Paulo were analyzed, becoming feasible to determine two parameters: the mean propagation velocity between electrodes (about 1.2 cm/s) and the main components of the basal frequency (0.63 e 0.65 Hz).

A dinâmica em meso-escala nos oceanos globais é dominada por sinais propagantes para oeste. Estudos pioneiros a utilizar medidas de altimetria por satélites associaram este sinal a ondas de Rossby longas do primeiro modo baroclínico. Com o recente aumento de resolução nos dados altimétricos, estudos mais recentes sugerem que vórtices de meso-escala não-lineares seriam os principais responsáveis pelo sinal propagante observado, em detrimento às ondas de Rossby. O objetivo do presente trabalho é identificar estruturas coerentes associadas a vórtices de meso-escala e distingui-las das ondas de Rossby longas do primeiro modo baroclínico. Mapas de anomalia da altura da superfície do mar (η) foram filtrados através da análise de ondaletas e um algoritmo de identificação e extração de estruturas vorticais. Os vórtices extraídos foram caracterizados através do ajuste de um paraboloide elíptico. O algoritmo demonstrou-se capaz de identificar e extrair as estruturas associadas a vórtices de meso-escala. Os resultados indicam predominância de anéis vorticais anti-ciclônicos. Os espectros de potência zonais-temporais de η indicam que a maior parte da variância distribui-se na região não-dispersiva do espectro teórico de ondas de Rossby lineares. A propagação observada nos componentes resultantes do filtro indicam coexistência de ondas de Rossby lineares e vórtices de meso-escala, comprovando assim a hipótese científica estabelecida para este trabalho. / The mesoscale dynamics in the global oceans is dominated by westward propagating signals. Pioneering studies using satellite altimetry measurements associated these observations with first-mode baroclinic Rossby waves. With the increase in altimetry data resolution, recent studies suggest that nonlinear mesoscale eddies are responsible for the westward propagating signal rather than Rossby waves. The objective of this study is to identify coherent structures associated with mesoscale eddies and distinguish them from long first-mode baroclinic Rossby waves. Sea surface height anomaly maps (η) were filtered throught wavelet analysis and an algorithm for identifying and extracting vortical structures. The extracted vortices were characterized by adjusting an elliptic paraboloid. The algorithm proved to be able to identify and extract the structures associated to mesoscale eddies. The results indicate a predominance of anti-cyclonic rings. Zonal-temporal power spectral density of η indicate that most of the variance is located at the non-dispersive region of the theoretical linear Rossby wave spectra. The observed propagation of the filtered components indicate coexistence of linear Rossby waves and mesoscale eddies, thus proving the scientific hypothesis of this study.

Shum Yu Hing. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1994. / Includes bibliographical references (leaves 140-143). / ABSTRACT --- p.1 / Chapter 1. --- INTRODUCTION / Chapter 1.1. --- Fourier Analysis --- p.3 / Chapter 1.2. --- Wavelet Analysis --- p.6 / Chapter 1.3. --- Parallelization --- p.10 / Chapter 1.3.1. --- Data Dependency Analysis / Chapter 2. --- LITERATURE SURVEY / Chapter 2.1. --- One Dimensional Fast Wavelet Transform (Discrete) --- p.13 / Chapter 2.2. --- Shared Memory Architecture : Parallel Virtual Machine (PVM) / Chapter 2.3. --- Distributed Memory Architecture : Massively Parallel Machine (DECmpp) --- p.21 / Chapter 3. --- THEORY / Chapter 3.1. --- Parallel Processing / Chapter 3.1.1. --- Amdahl ´ةs Law --- p.25 / Chapter 3.1.2. --- Quality Factor --- p.31 / Chapter 3.2. --- Parallel Architecture / Chapter 3.2.1. --- Pipelining --- p.32 / Chapter 3.2.2. --- Vector Processors --- p.34 / Chapter 3.2.3. --- Multiprocessor --- p.34 / Chapter 3.2.4 --- Array Processors --- p.36 / Chapter 3.2.5. --- Systolic Array Processing --- p.37 / Chapter 3.2.6. --- Granularity --- p.40 / Chapter 3.2.7. --- Load Balancing & Throughput --- p.42 / Chapter 3.3. --- Parallel Programming --- p.43 / Chapter 3.4. --- Parallel Numerical Algorithm / Chapter 3.4.1. --- Parallelism Within a Statement --- p.44 / Chapter 3.4.2. --- Parallelism Between Statements --- p.47 / Chapter 4. --- IMPLEMENTATION / Chapter 4.1. --- Sequential Version --- p.49 / Chapter 4.2. --- Parallel Version / Chapter 4.2.1. --- Matrix Representation of Wavelet Transform / Chapter 4.2.1.1. --- Decomposition --- p.52 / Chapter 4.2.1.2. --- Reconstruct ion --- p.55 / Chapter 4.2.2. --- Parallel Virtual Machine (PVM) / Chapter 4.2.2.1. --- Parallel Algorithm / Chapter (a) --- HOST --- p.56 / Chapter (b) --- NODE --- p.57 / Chapter 4.2.2.2. --- Flowcharts --- p.59 / Chapter 4.2.2.3. --- Timing Model Analysis --- p.65 / Chapter 4.2.2.4 --- Quality Factor / Chapter (a) --- Decomposition --- p.71 / Chapter (b) --- Reconstruction --- p.72 / Chapter 4.2.3. --- Massively Parallel Machine - DECmpp --- p.73 / Chapter 4.2.3.1. --- Parallel Algorithm for ACU & PEs / Chapter 4.2.3.2. --- Flowcharts --- p.75 / Chapter 4.2.3.3. --- Timing Model Analysis / Chapter (a) --- Communication Strategy --- p.77 / Chapter (b) --- Decomposition --- p.78 / Chapter (c) --- Reconstruct ion --- p.87 / Chapter 4.2.3.4. --- Quality Factor / Chapter (a) --- Decomposition --- p.89 / Chapter (b) --- Reconstruction --- p.89 / Chapter 4.2.3.5. --- Mapping --- p.92 / Chapter 5. --- RESULT / Chapter 5.1. --- Parallel Virtual Machine (PVM) / Chapter 5.1.1. --- Sequential Version --- p.93 / Chapter 5.1.2. --- Parallel Version --- p.103 / Chapter 5.2. --- Massively Parallel Machine - DECmpp / Chapter 5.2.1. --- Sequential Vers ion --- p.104 / Chapter 5.2.2. --- Parallel Version --- p.110 / Chapter 5.3. --- Output File Generated from both machines --- p.118 / Chapter 6. --- DISCUSSION / Chapter 6.1. --- Application on real time situation --- p.123 / Chapter 6.2. --- Two dimensional or Multidimensional case --- p.123 / Chapter 6.3. --- Block Algorithm Approach / Chapter 6.3.1. --- Blocked --- p.124 / Chapter 6.3.2. --- Row Wrapped --- p.126 / Chapter 6.4. --- Memory Requirement --- p.127 / Chapter 6.5. --- Signal Size Prediction / Chapter 6.5.1. --- Method A --- p.131 / Chapter 6.5.2. --- Method B --- p.133 / Chapter 7. --- CONCLUSION --- p.134 / Chapter 8. --- FUTURE MODIFICATION --- p.138 / REFERENCE --- p.140 / LISTING --- p.144 / APPENDIX I - Technical Information of PVM --- p.145 / Chapter II - --- Technical Information of DECmpp --- p.152 / Chapter III - --- Some Tips/Guide --- p.165

by Wai-Hung Leung. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves 73-75). / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- Wavelet Theory --- p.5 / Chapter 2-1 --- Basic Wavelet Theories --- p.5 / Chapter 2-2 --- Example of Haar Wavelet Base --- p.6 / Chapter 2-3 --- Wavelet Decomposition and Reconstruction with Multiresolution Analysis --- p.12 / Chapter 2-4 --- Conditions for the Effective Filter Bank and the Constructions of the Filter Coefficients --- p.17 / Chapter 2-5 --- Comparison between Wavelet Analysis and Fourier Analysis --- p.20 / Chapter 3 --- Waveform Relaxation Analysis of Distributed Network --- p.25 / Chapter 3-1 --- Introduction --- p.25 / Chapter 3-2 --- Method of Characteristics for the Simulation of Transmission Lines --- p.27 / Chapter 3-3 --- Waveform Relaxation Algorithm --- p.30 / Chapter 3-4 --- Pade Synthesis of Lossy Characteristic Impedance --- p.33 / Chapter 4 --- Application of FFT on the Transient Simulation of Distributed Network --- p.39 / Chapter 4-1 --- Simulation of Wave Propagation in Lossy Transmission Line with FFT --- p.39 / Chapter 4-2 --- Some Special Properties of the Wave Propagation Function of Lossy Transmission Lines --- p.44 / Chapter 5 --- Wavelet-based Convolution --- p.49 / Chapter 5-1 --- Introduction --- p.49 / Chapter 5-2 --- Application of Wavelet-based Convolution on the Simulation of Wave Propagation Function and Waveform Transformation --- p.58 / Chapter 6 --- Experimental Results of using Wavelet- based Convolution on the Transient Simulation of Lossy Transmission Lines --- p.64 / Chapter 7 --- Conclusions and Prospective Studies --- p.71 / Chapter 8 --- References --- p.73 / Appendix Program Lists --- p.76

随着3D 图形学技术的快速发展，基于细分小波的多分辨率方法受到了越来越多的关注。为了提高运算效率， 一些细分小波采用了厅局部提升用的方法以避免解全局方程组的庞大开销。这种方法虽然极大地提高了小波分解的速度，但也使得这些小波较之一些经典的细分小波在生成曲面的质量上有所不如。在本篇论文里，我们提出了一组新型细分小波。这些小波变换不但保留了"局部提升"波运算速度快，节省内存的优点，在生成模型的质量上也大大提高，接近了经典的全局优化小波。 / 我们构造了极细分小波用于极结构快速简化和重构。极细分小波变换有效地避免Catmull -Clark 细分小波用于极结构时所造成的"皱裙"和鞍点，可以在高度数的异常点区域生成非常自然的二次连续曲面。为了更好的应用于普通的四边形网格曲面，我们还改进了极细分小波使之生成的曲面可以在边界处与Catmull-Clark 细分小波曲面光滑地融合。实验表明我们构造的混合极细分小波不但运算效率高，节省内存，还具有良好的稳定性，生成的曲面质量良好。基于矩阵值细分，我们还构造了一组近似和插值类型的矩阵值小波。由于矩阵值小波变换直接作用于向量，我们可以利用向量中额外的项作为参数以控制生成的多分辨率由面的形状。通过优化这些形状控制参数，我们在保持高效低内存消耗的同时，还可以进一步提高"局部提升"小波曲面的质量。 / 我们还将矩阵值小波应用于3D 模型的几何压缩。为了避免存储形状控制参数所带来的额外消耗，我们采用固定的形状控制参数从而将矩阵值小波简化为一种特殊的标量值小波。实验表明采用我们的小波的压缩方法，其压缩率接近于经典的全局优化小波，远高于"局部提升"小波。其压缩速度则接近于"局部提升"小波，远高于经典的采用全局优化小波。在未来的研究工作中，我们会进一步优化形状控制参数的选择策略，并尝试将其应用范围从目前三角形网格由面扩展到四边形曲面， T 样条曲面以及混合曲面。我们还将研究如何应用己有的小波变换提高多分辨率编辑与动画技术。 / During the rapid development of 3D graphics applications, the wavelet-based multiresolution approaches have attracted more attention because they can effectively reduce the process/storage costs of high-detailed models. For the efficiency, many wavelets are constructed by using local lifting, which makes the fitting quality of results are not good as the usual wavelets with global optimization. On the other hand, once the wavelet transforms were constructed, the multiresolution meshes got by them cannot be adjusted any more. It is important to develop the new adaptive wavelets with better fitting quality, while keeping the high efficiency. In this dissertation, we provide several secondgeneration wavelets with improved fitting qualities, which include the compound biorthogonal wavelets for the hybrid quadrilateral meshes, and the efficient matrix-valued wavelets for complex triangular meshes. / We propose the novel polar subdivision wavelet, which efficiently generate multiresolution the polar structures. Polar structures are the natural representations of the self-revolution structures or high-valence regions of quadrilateral grids. The traditional multiresolution methods for the polar structures often generate deficits caused by high valence vertices. By adopting the polar subdivision and the special lifting operations on the polar structures, our wavelet transforms can generate smooth multiresolution surfaces without ripples and saddle points. To process the hybrid meshes made of quadrilaterals and polar structures, we extend the polar wavelet to the vertices in the circular layers, which makes it possible to fuse the surfaces generated by different wavelet transforms seamlessly. To improve the fitting quality of local lifting wavelets, we extend wavelet constructions from the scalar-valued scheme to the matrix-valued scheme, and propose a family of novel approximate and interpolatory matrix-valued subdivision wavelets. The matrix-valued wavelets are constructed from the refinable basis function vectors, which deal with the additional parameters to the geometric position of vertices. Since the final results of wavelet transforms are sensitive to the parameters, these parameters can be used to adjust the shape of multiresolution surfaces. By applying the lifting scheme, the computations of wavelet transform are local and in-placed. We also discuss the strategy of better shape controls for improving the fitting quality of simplified surfaces. The experiments showed that these novel wavelet transforms were sufficiently stable and performed well for noise reduction. With the suitable shape control parameters, the fitting quality of multiresolution surfaces can be further improved. / We study how to apply the efficient compression approach to the real applications, such as the compression of meshes. Since the shape control parameters need the additional storage, they will decrease the compression ratio if we apply the original versions of matrix-valued wavelets. We revise the construction of the matrix-valued wavelet transform and proposed the parameterized scalar-valued wavelet transform. With the special optimization of wavelet construction and suitable parameters, our compression approach has the high compression ratio close to the well-known approaches using the global orthogonal wavelets, and much higher compression ratio than the compression using the local lifting wavelets, while keeping the good efficiency. In the future work, we plan to extend the matrix-valued wavelets from triangular meshes to quadrilateral, normal and hybrid meshes. We will study how to apply the matrix-valued wavelets to the applications, such as multiresolution editing and animations. Further optimization of the shape control parameters for mobile and online applications is also an important issue. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Zhao, Chong. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2012. / Includes bibliographical references (leaves 136-149). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese. / Abstract --- p.i / Acknowledgement --- p.v / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Introduction --- p.1 / Chapter 1.2 --- Wavelet Transform --- p.4 / Chapter 1.2.1 --- Wavelets and Multiresolution Analysis --- p.4 / Chapter 1.2.2 --- Continuous Wavelet Transforms --- p.7 / Chapter 1.2.3 --- Discrete Wavelet Transform --- p.8 / Chapter 1.3 --- Second Generation Wavelets --- p.9 / Chapter 1.3.1 --- Lifting Scheme --- p.9 / Chapter 1.3.2 --- Subdivision --- p.11 / Chapter 1.3.3 --- Subdivision Wavelets --- p.13 / Chapter 1.4 --- Main Contributions --- p.15 / Chapter 1.5 --- Chapter Summary --- p.16 / Chapter 2 --- Compound Wavelets on Quadrilaterals --- p.18 / Chapter 2.1 --- Introduction --- p.18 / Chapter 2.2 --- Related Work --- p.19 / Chapter 2.3 --- Polar Subdivision --- p.20 / Chapter 2.3.1 --- Subdivision in radial layers --- p.21 / Chapter 2.3.2 --- Subdivision in circular layers --- p.24 / Chapter 2.4 --- Subdivision Wavelets Using Lifting --- p.25 / Chapter 2.4.1 --- Lifting wavelets --- p.25 / Chapter 2.4.2 --- Wavelet transforms --- p.29 / Chapter 2.5 --- Compound Subdivision Wavelets --- p.32 / Chapter 2.6 --- Experimental Results --- p.34 / Chapter 2.7 --- Chapter Summary --- p.38 / Chapter 3 --- Matrix-valued Loop Wavelets --- p.40 / Chapter 3.1 --- Introduction --- p.40 / Chapter 3.2 --- Related Work --- p.41 / Chapter 3.3 --- Matrix-valued Loop Subdivision --- p.43 / Chapter 3.4 --- Matrix-valued Loop Subdivision Wavelet --- p.46 / Chapter 3.4.1 --- Lazy Wavelet --- p.46 / Chapter 3.4.2 --- Inner Product --- p.49 / Chapter 3.4.3 --- Wavelet Transform --- p.54 / Chapter 3.4.4 --- Shape Control Parameters --- p.55 / Chapter 3.5 --- Experiments and Discussion --- p.57 / Chapter 3.6 --- Chapter Summary --- p.61 / Chapter 4 --- Matrix-valued Interpolatory Wavelets --- p.63 / Chapter 4.1 --- Introduction --- p.63 / Chapter 4.2 --- Matrix-valued Interpolatory Subdivision --- p.64 / Chapter 4.3 --- Matrix-valued 1-ring Wavelets --- p.67 / Chapter 4.3.1 --- Biorthogonal Wavelet Transform --- p.67 / Chapter 4.3.2 --- Extraordinary Points Treatment --- p.74 / Chapter 4.3.3 --- Shape Control Parameters --- p.75 / Chapter 4.4 --- Matrix-valued 2-ring Wavelets --- p.81 / Chapter 4.5 --- Experiments and Discussion --- p.86 / Chapter 4.5.1 --- 1-ring Wavelet Transform --- p.86 / Chapter 4.5.2 --- 2-ring Wavelet Transform --- p.92 / Chapter 4.6 --- Chapter Summary --- p.98 / Chapter 5 --- Geometry compression using wavelets. --- p.100 / Chapter 5.1 --- Introduction --- p.100 / Chapter 5.2 --- Related Work --- p.101 / Chapter 5.3 --- Matrix-valued Wavelet Transform --- p.105 / Chapter 5.3.1 --- Matrix-valued Loop Subdivision --- p.105 / Chapter 5.3.2 --- Lazy Wavelet --- p.108 / Chapter 5.3.3 --- Inner Product --- p.109 / Chapter 5.3.4 --- Wavelet Transform --- p.112 / Chapter 5.3.5 --- Coding --- p.113 / Chapter 5.4 --- Experiments and discussion --- p.114 / Chapter 5.4.1 --- Stability --- p.117 / Chapter 5.4.2 --- Efficiency --- p.118 / Chapter 5.4.3 --- Compressions --- p.120 / Chapter 5.5 --- Chapter Summary --- p.124 / Chapter 6 --- Conclusions --- p.125 / Chapter 6.1 --- Research Summary --- p.125 / Chapter 6.2 --- Future Work --- p.127 / Chapter A --- Inner Products of Wavelets in Radial Layers --- p.130 / Chapter B --- Publication List --- p.133 / Bibliography --- p.134

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2018. / Esta dissertação compreende o estudo da fadiga muscular, e aborda a determinação de parâmetros que possibilitem a avaliação objetiva da fadiga muscular em esforços físicos dinâmicos utilizando EMG-S (eletromiografia de superfície). O trabalho tem enfase na busca que parâmetros que permitam a repetibilidade da avaliação em diferentes voluntários e diferentes tipos de esforços físicos. Além de índices indicadores de fadiga já consolidados na literatura, usar-se-á um indicador demostrado pelo grupo de pesquisa da Universidade de Brasília, que mostrou bastante eficácia e sensibilidade quanto à evolução da fadiga muscular. Tanto para este parâmetro quanto para os outros abordou-se, além da verificação direta dos indicadores uma análise com indicadores acumulativos. As avaliações realizadas mostraram que, ajustando os parâmetros de processamento de sinais flexivelmente de acordo com cada sinal, tanto os novos quanto os parâmetros clássicos se mostram tão promissores na análise de exercícios dinâmicos como já observado na análise de exercícios isostáticos. Os modelos determinantes de indicadores de fadiga através de EMG-S mostraram um grau de reprodutibilidade alvissareiro em relação a diferentes pessoas, diferente exercício e diferentes músculos de estudo. / This work comprises the study of muscle fatigue and addresses the determination of parameters that allow the objective evaluation of muscle fatigue in dynamic physical efforts using EMG-S(surface electromyography). The work focuses on the search for parameters that allow the repeatability of the evaluation in different volunteers and different types of physical efforts. In addition to indexes of fatigue already consolidated in the literature, an indicator will be used, demonstrated by the research group of the University of Brasília, which showed a great deal of efficacy and sensitivity regarding the evolution of muscular fatigue. For both this parameter and the others, it was approached, besides the direct verification of the indicators, an analysis with cumulative indicators. The evaluations showed that by adjusting the signal processing parameters flexibly according to each signal, both the new and the classical parameters are shown as promising in the analysis of dynamic exercises as already observed in the analysis of isotactic exercises. The determinant models of fatigue indicators through EMG-S showed a degree of reproducibility in relation to different people, different exercise and different study muscles.

by Xin-xin Niu. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web.