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Dissertations / Theses on the topic 'Periodograma'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Basile, Antonio Luiz. "Serviço local de periodograma em GPU para detecção de trânsitos planetários." Universidade Presbiteriana Mackenzie, 2017. http://tede.mackenzie.br/jspui/handle/tede/3469.

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Gastaldi, Marcio Ribeiro. "Uso do periodograma de lomb e da transformada Wavelet para detecção de periodicidades em radiofontes extragalácticas." Universidade Presbiteriana Mackenzie, 2016. http://tede.mackenzie.br/jspui/handle/tede/3133.

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Gastaldi, Márcio Ribeiro. "Uso do periodograma de Lomb e da transformada Wavelet para detecção de periodicidades em radiofontes extragalácticas." Universidade Presbiteriana Mackenzie, 2016. http://tede.mackenzie.br/jspui/handle/tede/3498.

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Submitted by Marta Toyoda (1144061@mackenzie.br) on 2018-02-16T16:24:19Z No. of bitstreams: 2 Márcio Ribeiro Gastaldi.pdf: 4169039 bytes, checksum: c46ba498a99d4d81191da8c28dee1155 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Paola Damato (repositorio@mackenzie.br) on 2018-04-04T11:47:37Z (GMT) No. of bitstreams: 2 Márcio Ribeiro Gastaldi.pdf: 4169039 bytes, checksum: c46ba498a99d4d81191da8c28dee1155 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DSpace on 2018-04-04T11:47:3

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Mahú, Sinclair Rodrigo Manuel. "Caracterización de exoplanetas mediante técnicas de procesamiento de señales y método de las velocidades radiales." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/141037.

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Ingeniero Civil Electricista<br>El método de las velocidades radiales permite la detección de planetas en otros sistemas solares, al obtener las características y configuración del sistema planetario. Esto es usualmente realizado por métodos secuenciales, que no garantizan obtener una solución global del problema. Una distorsión en la primera señal detectada, en conjunto con la ventana de muestreo no uniforme pueden causar la aparición de componentes artificiales. En este trabajo se desarrolló un método para encontrar una solución global del problema. Determinando tanto el número de com

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5

Evangelista, Dilson Henrique Ramos. "Análise espectral através de cruzamentos de ordem superior." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2000. http://hdl.handle.net/10183/126768.

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Muitas vezes, é de interesse na análise de séries temporais verificar se existe periodicidade numa série dada. Para isso é empregada a análise espectral clássica, utilizando a função densidade espectral e a função periodograma. O objeti,·o desse trabalho é fornecer uma análise espectral alternativa baseada em cruzamentos de ordem superior, ou HOC. Enunciamos um teorema que mostra a relação entre análise espectral clássica e análise espectral utilizando cruzamento de ordem superior.<br>In the analysis of time series, it is often intercsting to seek for periodicities in a given series, where the

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6

Fay, Gilles. "Theoremes limites pour les fonctionnelles du periodogramme." Phd thesis, Ecole nationale supérieure des telecommunications - ENST, 2000. http://tel.archives-ouvertes.fr/tel-00001139.

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Le périodogramme est un outil naturel pour l'analyse spectrale d'une série temporelle stationnaire au second ordre. La littérature sur les séries temporelles en donne grand nombre de propriétés - principalement asymptotiques -, que le signal soit a dependence courte ou longue. Beaucoup de ces resultats font l'hypothese supplementaire de gaussianite. La principale contribution de ce travail est l'extension de nombreux resultats connus aux signaux non-gaussiens. Nous traiterons le periodogramme de l'i.i.d. et donnerons une expression asymptotique de ses moments a tout ordre. Nous montrerons que

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Carvalho, Jhonnata Bezerra de. "Classificador m?quina de suporte vetorial com an?lise de Fourier aplicada em dados de EEG e EMG." Universidade Federal do Rio Grande do Norte, 2016. http://repositorio.ufrn.br/handle/123456789/20964.

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Dulesov, Egor. "Identifikace významných spektrálních složek ve stresovém řečovém signálu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-241000.

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The aim of this master’s thesis is to learn the problem of analysis and identification of significant spectral components in speech signal. Based on learning a special literature chooses the suitable methods of spectrum estimate. Does learning the literature in specification of testing of spectral components significate. Makes a procedure for identification of chosen speech formants. Does this procedure for audio signals both of in stress and in normal state. Estimates the results, compares efficiency of chosen methods and determine threshold for chosen formant of analyzed stress signal. State

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Zhou, Yinghui. "Estimating the fractional differencing parameter, d, of a long memory time series and simulating stationary and invertible time series." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323223.

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10

Mayer, Celeste Cecile [Verfasser], and V. [Akademischer Betreuer] Fasen-Hartmann. "Whittle estimation and the functional integrated periodogram for MCARMA processes / Celeste Cecile Mayer ; Betreuer: V. Fasen-Hartmann." Karlsruhe : KIT-Bibliothek, 2021. http://nbn-resolving.de/urn:nbn:de:101:1-2021092905001654368076.

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11

Hardouin, Cécile. "Quelques resultats nouveaux en statistique des processus : contraste fort, regression a residus a longue portee, estimation par log-periodogramme." Paris 7, 1992. http://www.theses.fr/1992PA077084.

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On etudie d'abord les estimateurs definis par processus de contraste fort; le resultat de consistance forte est generalise au cas non ergodique: variables aleatoires independantes non identiquement distribuees, regression a residus ergodiques correles, estimation par pseudovraisemblance et par codage pour un champ markovien; la normalite asymptotique permet d'obtenir un test de melange de chi-2 de sous-hypotheses emboitees, qui devient un test du chi-2 de difference de codage dans le cas markovien. Ces resultats permettent d'etablir la consistance forte de l'estimateur des moindres carres dans

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12

Yoshinaga, Kenji. "Comparison of phase synchronization measures for identifying stimulus－ induced functional connectivity in human magnetoencephalographic and simulated data." Kyoto University, 2020. http://hdl.handle.net/2433/259724.

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Zhang, Junbo. "EMPIRICAL COMPARISON OF THREE SIGNAL PROCESSING METHODS: ADAPTIVE PERIODOGRAM TECHNIQUE, MORLET WAVELET TRANSFORM, AND ADAPTIVE WINDOWED FOURIER TRANSFORM AND THEIR APPLICATION ON GRAVITY WAVES." Oxford, Ohio : Miami University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1145385180.

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14

Dorai-Raj, Sundardas Samuel. "First- and Second-Order Properties of Spatiotemporal Point Patterns in the Space-Time and Frequency Domains." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/28540.

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Point processes are common in many physical applications found in engineering and biology. These processes can be observed in one-dimension as a time series or two-dimensions as a spatial point pattern with extensive amounts of literature devoted to their analyses. However, if the observed process is a hybrid of spatial and temporal point process, very few practical methods exist. In such cases, practitioners often remove the temporal component and analyze the spatial dependencies. This marginal spatial analysis may lead to misleading results if time is an important factor in the process. In

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Povalač, Karel. "Sledování spektra a optimalizace systémů s více nosnými pro kognitivní rádio." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-233577.

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The doctoral thesis deals with spectrum sensing and subsequent use of the frequency spectrum by multicarrier communication system, which parameters are set on the basis of the optimization technique. Adaptation settings can be made with respect to several requirements as well as state and occupancy of individual communication channels. The system, which is characterized above is often referred as cognitive radio. Equipments operating on cognitive radio principles will be widely used in the near future, because of frequency spectrum limitation. One of the main contributions of the work is the n

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Li, Chang. "Non-contract Estimation of Respiration and Heartbeat Rate using Ultra-Wideband Signals." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/34990.

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The use of ultra-wideband (UWB) signals holds great promise for remote monitoring of vital-signs which has applications in the medical, for first responder and in security. Previous research has shown the feasibility of a UWB-based radar system for respiratory and heartbeat rate estimation. Some simulation and real experimental results are presented to demonstrate the capability of the respiration rate detection. However, past analysis are mostly based upon the assumption of an ideal experiment environment. The accuracy of the estimation and interference factors of this technology has not been

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Matricardi, Elisabetta. "Performance Analysis of a Radar System Based on 5G Signals." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Poiché lo spettro sta diventando una risorsa sempre più scarsa, l'idea di riutilizzarlo per più di un'applicazione è interessante, in quanto può evitare il sottoutilizzo di risorse spettrali altrimenti allocate in modo permanente. Negli ultimi anni è stata introdotta una alternativa ai segnali radar, che consiste in forme d'onda OFDM generate digitalmente. Questa tesi ha come obiettivo quello di investigare le prestazioni di un segnale di comunicazione, il 5G NR, quando usato per scopi di sensing. Un sistema radar e un algoritmo di processing basato sull'elaborazione radar OFDM nel dominio del

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Clifford, Gari D. "Signal processing methods for heart rate variability analysis." Thesis, University of Oxford, 2002. http://ora.ox.ac.uk/objects/uuid:5129701f-1d40-425a-99a3-59a05e8c1b23.

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Heart rate variability (HRV), the changes in the beat-to-beat heart rate calculated from the electrocardiogram (ECG), is a key indicator of an individual's cardiovascular condition. Assessment of HRV has been shown to aid clinical diagnosis and intervention strategies. However, the variety of HRV estimation methods and contradictory reports in this field indicate that there is a need for a more rigorous investigation of these methods as aids to clinical evaluation. This thesis investigates the development of appropriate HRV signal processing techniques in the context of pilot studies in two fi

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Wang, Jun. "SPECTRAL CHARACTERIZATION OF IONOSPHERE SCINTILLATION: ALGORITHMS AND APPLICATIONS." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1385774581.

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Liu, Zhao. "Exploration and application of MISR high resolution Rahman Pinty-Verstraete time series." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2711.

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Thesis (Doctor of Engineering in Electrical Engineering)--Cape Peninsula University of Technology, 2017.<br>Remote sensing provides a way of frequently observing broad land surfaces. The availability of various earth observation data and their potential exploitation in a wide range of socioeconomic applications stimulated the rapid development of remote sensing technology. Much of the research and most of the publications dealing with remote sensing in the solar spectral domain focus on analysing and interpreting the spectral, spatial and temporal signatures of the observed areas. However, t

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Kouakou, Kouadio Simplice. "Echantillonnage aléatoire et estimation spectrale de processus et de champs stationnaires." Thesis, Rennes 2, 2012. http://www.theses.fr/2012REN20019.

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Dans ce travail nous nous intéressons à l'estimation de la densité spectrale par la méthode du noyau pour des processus à temps continu et des champs aléatoires observés selon des schémas d'échantillonnage (ou plan d'expériences) discrets aléatoires. Deux types d'échantillonnage aléatoire sont ici considérés : schémas aléatoires dilatés, et schémas aléatoires poissonniens. Aucune condition de gaussiannité n'est imposée aux processus et champs étudiés, les hypothèses concerneront leurs cumulants.En premier nous examinons un échantillonnage aléatoire dilaté utilisé par Hall et Patil (1994) et pl

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Grillo, Barbara. "Ricostruzione dell’idrodinamica delle acque di falda del Carso Classico." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8665.

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2011/2012<br>All'interno del massiccio carsico del Carso Classico si sviluppa il reticolo del cosiddetto Timavo ipogeo, uno tra i più famosi fiumi carsici al mondo, il cui percorso stimato in circa 80 km di sviluppo lineare tra Slovenia e Italia, nonostante sia stato oggetto di oltre due secoli di studi scientifici, è per alcuni aspetti misterioso. L’obiettivo di questa Tesi è: 1)la riorganizzazione e ottimizzazione della rete di monitoraggio delle acque di falda del Carso Classico; 2)l’analisi dei dati in continuo esistenti (portate, precipitazioni, livello, temperatura e conducibilità);

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Meziani, Mohamed Aymen. "Estimation paramétrique et non-paramétrique en utilisant une approche de régression quantile." Electronic Thesis or Diss., Paris Est, 2019. http://www.theses.fr/2019PESC0084.

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Le quantile périodogramme développé par Li (2012) est une nouvelle approche qui fournit une information plus étendue et plus riche par rapport au périodogramme ordinaire. Cependant, il souffre d'instabilité de performance dans le cas de présence de plusieurs périodicités dominantes ou dans le cas de données bruitées. Cela est du à la fuite spectrale (Leakage) produite sous forme de piques supplémentaires. Afin de remédier à ce problème, une version régularisée du quantile périodogramme est proposée. Les propriétés asymptotiques du nouvel estimateur sont développées. De plus, des simulations ap

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Marra, Matteo. "Prove su tavola vibrante di un silo metallico a fondo piano: identificazione dinamica mediante accelerometri." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18691/.

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La tesi descrive le metodologie messe in atto al fine di interpretare il comportamento di un silo metallico a fondo piano, contenente grano, soggetto a vari input sismici: segnali di tipo random (white noise), sinusoidi a bassa frequenza, ed accelerogrammi corrispondenti a sismi reali e artificiali (selezionati e costruiti in modo da avere determinati contributi in frequenza), opportunamente scalati in relazione alla risposta strutturale. Vengono quindi analizzati i risultati di estensimetri (strain gauges), accelerometri (monoassiali) e celle di pressione, effettuando confronti, oltre che tra

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Johnson, Paul E. "Uncertainties in Oceanic Microwave Remote Sensing: The Radar Footprint, the Wind-Backscatter Relationship, and the Measurement Probability Density Function." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/71.

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Oceanic microwave remote sensing provides the data necessary for the estimation of significant geophysical parameters such as the near-surface vector wind. To obtain accurate estimates, a precise understanding of the measurements is critical. This work clarifies and quantifies specific uncertainties in the scattered power measured by an active radar instrument. While there are many sources of uncertainty in remote sensing measurements, this work concentrates on three significant, yet largely unstudied effects. With a theoretical derivation of the backscatter from an ocean-like surface, results

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Machado, Juliano Costa. "Pré-processamento, extração de características e classificação offline de sinais eletroencefalográficos para uso em sistemas BCI." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/101210.

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O uso de sistemas denominados Brain Computer Interface, ou simplesmente BCI, para controle de dispositivos tem gerado cada vez mais trabalhos de análise de sinais de EEG, principalmente devido ao fato do desenvolvimento tecnológico dos sistemas de processamento de dados, trazendo novas perspectiva de desenvolvimento de equipamentos que auxiliem pessoas com debilidades motoras. Neste trabalho é abordado o comportamento dos classificadores LDA (Discriminante Linear de Fisher) e o classificador Naive Bayes para classificação de movimento de mão direita e mão esquerda a partir da aquisição de sina

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Pospíšil, Lukáš. "Analýza ROC křivek zvukových signálů a jejich srovnání." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316445.

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This thesis deals with oportunity of ROC curve usage in the description of methods that work with sound signals. Specifically, it focuses on ways of detecting of stress in speech signals. The detection itselfs is done in a range of frequencies of the sound signal. There is also a classifier designed using ROC curves that decides whether the input signal is stressed or not. The output of this thesis are findings gathered from analyses and also some recommendation based on those analyses.

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Humpolík, Tomáš. "Vliv dýchání na barorecepční reflex." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218770.

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This Master's thesis deals with the influence of breathe to baroreceptor reflex. The first chapter is focused on measuring of blood pressure, in reference to later used method. In the second part is detailed analysis and explanation of term baroreflex, relationship between frequency spectra of systolic blood pressure, heart rate and breathing, mechanisms of regulation of blood pressure and heart rate variability. Third chapter deals with possible ways, how to analyze data, which are needed for estimation of baroreflex sensitivity, analyze of heart rate variability and estimation of power spect

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Gismalla, Yousif Ebtihal. "Performance analysis of spectrum sensing techniques for cognitive radio systems." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/performance-analysis-of-spectrum-sensing-techniques-for-cognitive-radio-systems(157fe1af-717c-4705-a649-d809766cf5cb).html.

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Cognitive radio is a technology that aims to maximize the current usage of the licensed frequency spectrum. Cognitive radio aims to provide services for license-exempt users by making use of dynamic spectrum access (DSA) and opportunistic spectrum sharing strategies (OSS). Cognitive radios are defined as intelligent wireless devices capable of adapting their communication parameters in order to operate within underutilized bands while avoiding causing interference to licensed users. An underused band of frequencies in a specific location or time is known as a spectrum hole. Therefore, in order

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Dang, Xuan Hung. "Identification de la variabilité spatiale des champs de contraintes dans les agrégats polycristallins et application à l'approche locale de la rupture." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00822107.

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Cette thèse est une contribution à la construction de l'Approche Locale de la rupture à l'échelle microscopique à l'aide de la modélisation d'agrégats polycristallins. Elle consiste à prendre en compte la variabilité spatiale de la microstructure du matériau. Pour ce faire, la modélisation micromécanique du matériau est réalisée par la simulation d'agrégats polycristallins par éléments finis. Les champs aléatoires de contrainte (principale maximale et de clivage) dans le matériau qui représentent la variabilité spatiale de la microstructure sont ensuite modélisés par un champ aléatoire gaussie

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Fernandes, Joana Teresa de Almeida. "Análise de séries temporais no domínio da frequência: importância do periodograma neste contexto." Master's thesis, 2012. http://hdl.handle.net/10451/7830.

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Tese de mestrado em Estatística apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2012<br>Em diversas áreas científicas, muitos dos fenómenos estudados que evoluem no tempo apresentam um comportamento cíclico. No entanto, nem sempre é fácil identificar se uma série de observações no tempo tem ou não uma determinada periodicidade. Cabe aos que trabalham com as Probabilidades e a Estatística identificar não só a existência de periodicidade, como também decidir sobre a existência de uma ou mais componentes periódicas responsáveis pelo comportamento padronizado da série. Uma

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Li, Ming. "Nonparametric period estimation using the periodogram." Phd thesis, 2006. http://hdl.handle.net/1885/151654.

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Hwang, Jiang-Sia, and 黃江夏. "Source Localization with Method of Synthetic Aperture Evolutionary Periodogram." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/64884903884452588955.

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碩士<br>國立交通大學<br>電信工程研究所<br>84<br>In this thesis, a spatial spectrum estimation method is presented for sourcelocalization in an underwater environment using towed sensors. Conceptually,the method is developed as a modified version of the evolutionary periodogram(EP) and data- adaptive evolutionary (DAE) spectral estimators, which deal withthe tracking of time-varying sinusoidal signals. In particular, we start with the case of a single sensor and narrowband sources in which an effective ape

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(5930336), Jeremy M. Troisi. "Using ATS to Turn Time Series Estimation and Model Diagnostics into Fast Regression Estimation and Model Diagnostics." Thesis, 2019.

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<pre>The Average Transform Smooth (ATS) statistical methods [McRae, Mallows, and Cleveland], are applied to measurements of a non-gaussian random variable to make them close to gaussian. This gaussianization makes use of the well known concept of variance stabilizing transformation, but takes it further by first averaging blocks of r measurements, transforming next, and then smoothing. The smoothing can be nonparametric, or can be the fitting of a parametric model. The gaussianization makes analysis simpler and more effective.</pre><pre><br></pre><pre>In this work ATS is applied to the periodo

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Lu, Yu-Wen, and 盧煜文. "Energy Detector Using Welch’s Periodogram-Based and Segment Bandwidth for Denoising Algorithm in Cognitive Radios." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/au76u8.

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碩士<br>國立東華大學<br>電機工程學系<br>102<br>Cognitive radio(CR) is a novel smart wireless communication technology which solves the problems of the spectrum congestion and under-utilization. In cognitive radio networks, dynamic spectrum management is the most important mechanism of cognitive radio, but before implementing operational dynamic spectrum management, first it has to detect a wireless environment and determine the existence of signal which is spectrum sensing technique. Energy detector is one of spectrum sensing technique approach which is the most widely used in cognitive radio system becaus

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Yang, Yong-Shiang. "Is System IV a sideband of System III? The periodogram analyses of EUV and nKOM data." Thesis, 1989. http://hdl.handle.net/1911/13412.

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Jupiter's magnetosphere does not rigidly rotate with the System III angular rate. There is a corotation lag as a function of distance in the Jovian magnetosphere. The dominant rotational component, aside from System III, is a 3% longer period (System IV). System IV could be interpreted as a sideband of System III being amplitude-modulated by the 14.1-day period. Whether System IV is an independent Jovian coordinate or just a sideband is investigated in this thesis. The 9.64 hour period does not appear in periodogram analyses of EUV data from Voyager 2 and nKOM data from Voyager 1 and 2. Theref

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Robertson, Paul Montgomery. "The Hobby-Eberly telescope m-dwarf planet search program : new observations and results." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-1901.

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As part of the McDonald Observatory M dwarf planet search program, we present the results and detection limits for our high-precision radial velocity survey of 99 M dwarf stars. We also detail our efforts to improve the precision of our RV measurements as well as our frequency analysis methods. For any RV program, it is essential to obtain as high a precision as possible; increasing sensitivity can realistically reveal terrestrial-mass planets with our data. M dwarfs provide a unique opportunity to study these lower-mass planets (the so-called "super-Earths") from ground-based facilities; su

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Salam, A. O. A., Ray E. Sheriff, S. R. Al-Araji, K. Mezher, and Q. Nasir. "An overview on non-parametric spectrum sensing in cognitive radio." 2014. http://hdl.handle.net/10454/10780.

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No<br>Abstract: The scarcity of frequency spectrum used for wireless communication systems has attracted a considerable amount of attention in recent years. The cognitive radio (CR) terminology has been widely accepted as a smart platform mainly aimed at the efficient interrogation and utilization of permitted spectrum. Non-parametric spectrum sensing, or estimation, represents one of the prominent tools that can be proposed when CR works under an undetermined environment. As such, the periodogram, filter bank, and multi-taper methods are well considered in many studies without relying on the

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