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Relevant bibliographies by topics / Cross spectral coherency analysis / Dissertations / Theses

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Dissertations / Theses on the topic 'Cross spectral coherency analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Vowels, Matthew James. "THE APPLICATION OF SPECTRAL AND CROSS-SPECTRAL ANALYSIS TO SOCIAL SCIENCES DATA." UKnowledge, 2018. https://uknowledge.uky.edu/hes_etds/58.

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The primary goal of this paper is to demonstrate the application of a relatively esoteric and interdisciplinary technique, called spectral analysis, to dyadic social sciences data. Spectral analysis is an analytical and statistical technique, commonly used in engineering, that allows times series data to be analyzed for the presence of significant regular/periodic fluctuations/oscillations. These periodic fluctuations are reflected in the frequency domain as amplitude or energy peaks at certain frequencies. Furthermore, a Magnitude Squared Coherence analysis may be used to interrogate more tha

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2

Potočňák, Tomáš. "Klasifikace srdečních cyklů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219953.

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The aim of this work was to develop the method for classification of ECG beats into two classes, namely ischemic and non-ischemic beats. Heart beats (P-QRS-T cycles) selected from animals orthogonal ECGs were preprocessed and used as the input signals. Spectral features vectors (values of cross spectral coherency), principal component and HRV parameters were derived from the beats. The beats were classified using feedforward multilayer neural network designed in Matlab. Classification performance reached the value approx. from 87,2 to 100%. Presented results can be suitable in future studies a

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3

Kanaan, Mona N. "Cross-spectral analysis for spatial point-lattice processes." Thesis, [n.p.], 2000. http://dart.open.ac.uk/abstracts/page.php?thesisid=94.

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4

Kamboj, Sunita. "The cross-section for photoelectric-equivalent interactions in germanium for gamma-ray spectral analysis." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/16633.

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5

Spalt, Taylor Brooke. "Constrained Spectral Conditioning for the Spatial Mapping of Sound." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/70868.

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In aeroacoustic experiments of aircraft models and/or components, arrays of microphones are utilized to spatially isolate distinct sources and mitigate interfering noise which contaminates single-microphone measurements. Array measurements are still biased by interfering noise which is coherent over the spatial array aperture. When interfering noise is accounted for, existing algorithms which aim to both spatially isolate distinct sources and determine their individual levels as measured by the array are complex and require assumptions about the nature of the sound field. This work develo

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6

Jaimes, Rafael. "Spatiotemporal Organization of Atrial Fibrillation Using Cross-Bicoherence with Surrogate Data." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/828.

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Atrial fibrillation (AF) is a troublesome disease often overlooked by more serious myocardial infarctions. Up until now, there has been very little or no use of high order spectral techniques in order to evaluate the organization of the atrium during AF. Cross-bicoherence algorithm can be used alongside a surrogate data threshold in order to determine significant phase coupling interactions, giving rise to an organizational metric. This proposed algorithm is used to show rotigaptide, a gap junction coupling drug, significantly increases the organization of the atria during episodes of AF due t

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7

Yeung, Wai. "Sleep, pain and daytime functioning in patients with fibromyalgia syndrome and osteoarthritis : a cross-sectional comparative study." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/21798.

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Fibromyalgia syndrome (FMS) is a disorder characterised by chronic widespread pain, non-restorative sleep, fatigue and daytime dysfunction. Occurring in 2-5% of the population, the aetiology is largely unknown. Sleep dysfunction occurs in over 90% of FMS patients. While research has shown that both the macrostructure and microstructure of sleep may be altered, there remain inconsistencies in the polysomnographic (PSG) findings, and wide variations in methodological approaches. Few studies have controlled for symptom duration or the time elapsed between diagnosis and PSG sleep assessments. In a

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8

Gavrilovic, Milan. "Spectral Image Processing with Applications in Biotechnology and Pathology." Doctoral thesis, Uppsala universitet, Centrum för bildanalys, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160574.

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Color theory was first formalized in the seventeenth century by Isaac Newton just a couple of decades after the first microscope was built. But it was not until the twentieth century that technological advances led to the integration of color theory, optical spectroscopy and light microscopy through spectral image processing. However, while the focus of image processing often concerns modeling of how images are perceived by humans, the goal of image processing in natural sciences and medicine is the objective analysis. This thesis is focused on color theory that promotes quantitative analysis

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9

Kriss, Alissa Brynn. "The Role of Environmental, Temporal, and Spatial Scale on the Heterogeneity of Fusarium Head Blight of Wheat." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1320932280.

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10

Milan, Juliana Cristina. "Estudo da sensibilidade barorreflexa e sua relação com a produção de citocinas inflamatórias no processo de envelhecimento." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/7037.

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Made available in DSpace on 2016-08-17T18:39:51Z (GMT). No. of bitstreams: 1 6222.pdf: 2879821 bytes, checksum: 010a3c6abf3b0c6f2ec81ebf9ff59ef0 (MD5) Previous issue date: 2014-08-21<br>Universidade Federal de Sao Carlos<br>Aging causes changes in several human subsystems such as the cardiovascular and immune systems. The objective of this study was to evaluate the relationship between baroreflex function through linear algorithm (cross-spectral analysis) and proinflammatory cytokines in the aging process and also assess the baroreflex sensitivity, TNF-α, IL-6 and hsCRP in different age

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11

Marchetti, Paulo Henrique. ""Investigações sobre o controle neuromotor do músculo reto do abdome"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/39/39132/tde-10072006-091308/.

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O músculo reto do abdome é um importante músculo da parede abdominal, responsável pela estabilização e função da coluna, tanto em atividades atléticas quanto em atividades cotidianas. Entretanto, pouco se conhece sobre o controle neuromotor de tal estrutura em atividades voluntárias, como os exercícios abdominais, e como as diferentes tarefas agem na ativação segmentada das porções musculares do músculo reto do abdome. Em geral, a presente dissertação teve como objetivo investigar o controle neuromotor do músculo reto do abdome em diferentes tarefas voluntárias através de quatro experimentos.

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12

Correa, Marco Antonio. "ANÁLISE DAS OSCILAÇÕES DAS CORRENTES OBSERVADAS NA BAÍA DE ILHA GRANDE (RJ)." Universidade de São Paulo, 1994. http://www.teses.usp.br/teses/disponiveis/21/21132/tde-19032009-153439/.

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Series temporais de correntes, vento (força e direção), temperatura e salinidade, com duração de 24h, obtidas em 5 estações na Baia da Ilha Grande (rj), de 3-29/01/82, foram analisadas. As medições de corrente foram feitas a5, 12 e 20m, a cada 5min e a 2m acima do fundo, a cada 12min; temperatura e salinidade em cinco profundidades a cada 3h e vento a cada 1h. Foram utilizadas análises de series temporais através dos métodos diretos (periodograma) e indireto para as estimativas espectrais alisadas, bem como as equações hidrodinâmicas na determinação dos períodos. Foram utilizados os testes: ru

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13

Castelnau, Pascale de. "Approche dynamique et électrophysiologique du trouble de l’acquisition de la coordination." Toulouse 3, 2007. http://www.theses.fr/2007TOU30254.

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Les enfants affectés par un Trouble de l’Acquisition de la Coordination (TAC) ont des difficultés persistantes dans les activités qui requièrent une coordination motrice. Cette thèse a pour objectif de caractériser les troubles de ces enfants à un niveau comportemental et électrophysiologique. Dans le cadre une approche dynamique de la coordination, nous postulons que les troubles expérimentés par ces enfants résultent d’un trouble plus général de la synchronisation, indépendant des capacités attentionnelles. Dans cette optique, 24 enfants TAC et 60 enfants contrôles sont testés sur des tâches

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14

Pereira, Nair Emmanuela da Silveira. "Análise de parâmetros hidrodinâmicos e da clorofila a no Atlântico Sul e Tropical a partir de modelagem numérica e observações remotas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/21/21135/tde-26092013-190725/.

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Foi realizado um estudo com dados físicos em superfície provenientes de implementação do modelo numérico POM e dados de clorofila a do sensor MODIS, no Atlântico Sul e Tropical, tendo como finalidade analisar as variações espaciais de suas correlações. O modelo hidrodinâmico foi submetido a uma validação com dados do Projeto PIRATA e do sensor MODIS, obtendo-se resultados satisfatórios, principalmente em superfície. A clorofila a apresenta altos valores de correlação com variáveis físicas em superfície, porém esses valores são influenciados pela presença dos sinais anual e semianual nas séries

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15

Chang, Tsai-Tzu, and 張彩姿. "Dynamic Linkages between Energy and the Macroeconomy ─ Spectral Analysis and Cross-Country Comparison." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/e7t7eu.

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碩士<br>國立暨南國際大學<br>經濟學系<br>92<br>The objective of this thesis is to apply a research method that integrates band spectrum regression (BSR, a frequency domain approach) and vector autoregression (VAR, a time domain approach) to analyze the long-term and short-term dynamic linkages between energy consumption and macroeconomic variables in Taiwan and the United States. Based on the vector autoregression model, we first filter out frequencies of variable series by spectral analysis, and then convert the filtered series into time domain representations for conducting linkage analysis among variables

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16

"Solar Wind Influences on Properties of the Ionosphere." Thesis, 2013. http://hdl.handle.net/10388/ETD-2013-08-1198.

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The Sun’s corona expands outward, populating the solar system with plasma. This plasma is known as the solar wind. The solar wind carries with it the Sun’s magnetic ﬁeld, which is also known as the interplanetary magnetic ﬁeld (IMF). The resulting conﬁguration of the IMF creates a current sheet at solar equatorial latitudes, which the Earth crosses as it orbits the Sun. When the Earth is on one side of the current sheet it is in a sector where the IMF is directed largely away from or toward the Sun. On the other side of the current sheet the IMF is in opposite direction. The crossing of the cu

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