Дисертації з теми "Complex Transformer"
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Tavakoli, Hanif. "A High Frequency Transformer Winding Model for FRA Applications." Licentiate thesis, Stockholm : Skolan för elektro- och systemteknik, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11178.
Повний текст джерелаTavakoli, Hanif. "An FRA Transformer Model with Application on Time Domain Reflectometry." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-48568.
Повний текст джерелаQC 20111122
Завадський, Богдан Володимирович, та Bohdan Zavadskyi. "Оптимізація системи електропостачання трансформаторної підстанції 110/10 кВ". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, кафедра електричної інженерії,Тернопіль, Україна, 2021. http://elartu.tntu.edu.ua/handle/lib/36648.
Повний текст джерелаУ кваліфікаційній роботі магістра здійснено розробку технічних заходів щодо оптимізації системи електропостачання мережі трансформаторної підстанції 110/10 кВ. Встановлено, що необхідно забезпечити мережу ПС 110/10 кВ засобами дистанційного моніторингу параметрів на усіх рівнях. Отримані дані для місць розташування засобів контролю. Визначені чинники, що впливають на зниження ефективності процесу передачі електроенергії електричною мережею. Проведено дослідження моніторингу параметрів трансформатора засобами установки вимірювальних комплексів як з боку високої напруги так і з боку низької напруги. За виміряними даними побудований графік втрат в трансформаторі. Розроблені алгоритми на основі даних моніторингу і їх застосування на практиці для підвищення ефективності передачі електроенергії мережею.
In qualifying work of master's degree development of technical measures is carried out it is Set in relation to optimization of the system of power supply of network of transformer substation of 110/10 кВ., that it is necessary to provide a network by 110/10 кВ facilities of RMON of parameters on all levels. The locations of controls given for places are got. Certain factors that influence on the decline of efficiency of process of transmission of electric power an electric network. Research of monitoring of parameters of transformer is conducted by facilities of setting of measuring complexes as from the side of high tension so from the side of low tension. From measured data the built chart of losses is in a transformer. Worked out algorithms on the basis of data of monitoring and their application in practice for the increase of efficiency of transmission of electric power by a network.
ЗМІСТ ВСТУП 6 1 АНАЛІТИЧНИЙ РОЗДІЛ 9 1.1 Аналіз високовольтної мережі підстанції 110/10 кВ 9 1.2 Аналіз мережі середньої напруги ПС 110/10 кВ 12 1.3 Аналіз мережі низької напруги ПС 110/10 кВ 16 1.4 Висновки до розділу 1 17 2 РОЗРАХУНКОВО-ДОСЛІДНИЦЬКИЙ РОЗДІЛ 18 2.1 Існуючі методи контролю параметрів мережі 18 2.2 Критичний аналіз існуючих методів контролю параметрів мережі 21 2.3 Контроль втрат в мережі 110/10/0,4 кВ 24 2.4 Контроль величини втрат в трансформаторі і лінії 36 2.5 Висновки до розділу 2 39 3 ПРОЕКТНО-КОНСТРУКТОРСЬКИЙ РОЗДІЛ 40 3.1 Застосування розрахунку втрат по методу оперативних даних 40 3.2 Компенсація реактивної потужності 43 3.3 Інтелектуальна система АЧР 46 3.4 Використання моніторингу при технологічному приєднанні 48 3.5 Алгоритм визначення нетехнічних втрат 51 3.6 Нерівномірне навантаження в мережах 220-380 В 60 3.7 Контроль показників якості електроенергії 60 3.8 Контроль температури приладів обліку 61 3.9 Висновки до розділу 3 62 5 4 ОХОРОНА ПРАЦІ ТА БЕЗПЕКА В НАДЗВИЧАЙНИХ СИТУАЦІЯХ 63 4.1 Безпека праці електромонтера по обслуговуванню трансформаторних підстанцій і розподільних пунктів 63 4.2 Принципи і заходи підвищення стійкості функціонування об'єктів економіки 67 ЗАГАЛЬНІ ВИСНОВКИ 70 ПЕРЕЛІК ПОСИЛАНЬ 72
Sari, Huseyin. "Motion Estimation Using Complex Discrete Wavelet Transform." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1223205/index.pdf.
Повний текст джерелаYilmaz, Sener. "Generalized Area Tracking Using Complex Discrete Wavelet Transform: The Complex Wavelet Tracker." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608643/index.pdf.
Повний текст джерелаFerreira, Rafael Fransak. "Filogenia do Complexo Drosophila Buzzatii (Grupo Repleta): Inferências de Análises Multilocus Mitocondriais e Nucleares." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/17/17135/tde-26092011-154314/.
Повний текст джерелаDrosophila buzzatii complex (repleta group) consists of 13 species, divided into three clusters according to the banding seen in polytene chromosomes: D. stalkeri cluster, including D. richardsoni and D. stalkeri, restricted to the Caribbean Islands and Florida; D. martensis cluster, including D. martensis, D. uniseta, D. venezuelana and D. starmeri, found in desert areas of Colombia and Venezuela, and D. buzzatii cluster, including D. buzzatii, D. koepferae, D. antonietae, D.gouveai, D. borborema and D. seriema, that inhabit seasonally dry regions along the open vegetation diagonal in South America. This study aimed to infer the phylogenetic relationships among the D. buzzatii species complex, emphasizing the D. buzzatii cluster, by multilocus analysis of mitochondrial (COI and COII) and nuclear (EF-1F1, transformer and period) genes. In established phylogenetic hypotheises, the species of the D. buzzatii complex formed a monophyletic group, composed of two monophyletic subgroups, the D. martensis and D. buzzatii clusters, and a paraphyletic one, the D. stalkeri cluster. The relationships among the D. buzzatii species cluster were established. Drosophila buzzatii occupied the most basal position within the D. buzzatii cluster and is closely related to D. koepferae. D. antonietae occupied an intermediate position in relation to the D. koepferae and D. serido species. D. serido represents the sister taxon of the branch formed by the D. gouveai, D. borborema and D. seriema species, with D. gouveai occupying a basal position in relation to the sister species D. borborema and D. seriema. It was detected that purifying selection is the main force driving the evolution of transformer and period nuclear genes for the species of the D. buzzatii complex. The divergence time of the D. buzzatii species cluster was estimated by the COI gene analysis, revealing that the process of diversification of the group began in the Pliocene period, probably due to vicariant events associated with the uplift phase of the Andes, and it was also influenced by the advance and retraction of xerophytic vegetation in Pleistocene climatic fluctuations.
Daza, Enrique Acha. "Modelling of power system transformers in the complex conjugate harmonic space." Thesis, University of Canterbury. Electrical Engineering, 1988. http://hdl.handle.net/10092/5450.
Повний текст джерелаCasseli, Irène. "Eléments sur la transformée de Berezin et sur les opérateurs de Toeplitz dans des espaces de fonctions polyanalytiques." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0578.
Повний текст джерелаEntire polyanalytic functions generalize entire functions in that they are solutions of "Cauchy-Riemann equations of order n, of the form {\partial}^n f / \partial \overline{z}^n = 0, over the whole complex plane \mathbb{C}. Polyanalytic Fock space F^2_{\alpha,n} is, by analogy with the classical case, the closed subspace of the Hilbert space L^2(\mathbb{C},d\mu_\alpha), where \mu_\alpha is a Gaussian probability measure over \mathbb{C} with weight \alpha>0, of polyentire functions of order n. The aim of this PhD thesis is the study of classical objects of operator theory such that the Berezin transform and Toeplitz operators in the particular case of polyanalytic Fock spaces. In this written, it is shown among other results, that the L^p fixed points of the Berezin transform are constant functions. Concerning Toeplitz operators, the Sarason problem is studied. Given a function f, the Toeplitz operator with symbol f is formally defined by T^n_f(h)=P_{F^2_n}(f h), where P_{F^2_n} is the orthogonal projection from L^2(\mathbb{C},d\mu) on to F^2_n. The so-called Sarason's problem consists in finding necessary and sufficient conditions on the symbols f and g for the Toeplitz product with symbols f and \bar g to be bounded in the Fock space
Thornton, A. L. "Colour object recognition using a complex colour representation and the frequency domain." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301911.
Повний текст джерелаReeves, Tanya Heather. "Overcomplete image coding using the dual-tree complex wavelet transform." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615767.
Повний текст джерелаKennel, Pol. "Caractérisation de texture par analyse en ondelettes complexes pour la segmentation d’image : applications en télédétection et en écologie forestière." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20215/document.
Повний текст джерелаThe analysis of digital images, albeit widely researched, continues to present a real challenge today. In the case of several applications which aim to produce an appropriate description and semantic recognition of image content, particular attention is required to be given to image analysis. In response to such requirements, image content analysis is carried out automatically with the help of computational methods that tend towards the domains of mathematics, statistics and physics. The use of image segmentation methods is a relevant and recognized way to represent objects observed in images. Coupled with classification, segmentation allows a semantic segregation of these objects. However, existing methods cannot be considered to be generic, and despite having been inspired by various domains (military, medical, satellite etc), they are continuously subject to reevaluation, adaptation or improvement. For example satellite images stand out in the image domain in terms of the specificity of their mode of acquisition, their format, or the object of observation (the Earth, in this case).The aim of the present thesis is to explore, by exploiting the notion of texture, methods of digital image characterization and supervised segmentation. Land, observed from space at different scales and resolutions, could be perceived as being textured. Land-use maps could be obtained through the segmentation of satellite images, in particular through the use of textural information. We propose to develop competitive algorithms of segmentation to characterize texture, using multi-scale representations of images obtained by wavelet decomposition and supervised classifiers such as Support Vector Machines.Given this context, the present thesis is principally articulated around various research projects which require the study of images at different scales and resolutions, and which are varying in nature (eg. multi-spectral, optic, LiDAR). Certain aspects of the methodology developed are applied to the different case studies undertaken
Pillet, Basile. "Géométrie complexe globale et infinitésimale de l'espace des twisteurs d'une variété hyperkählérienne." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S021/document.
Повний текст джерелаThe purpose of this thesis is to construct geometric objects on a manifold C parametrizing rational curves in the twistor space of a hyperkähler manifold. We shall establish a correspondence between the complex geometry of the twistor space and some differential properties of C (differential operators and curvature of a complex riemannian structure inherited from the base hyperkähler manifold). The first chapters gather some classical results of the theory of hyperkähler manifolds and their twistor spaces. In the chapters 4, 5 and 6, we construct an equivalence of categories between bundles on the twistor space which are trivial on each line and bundles with a connexion of C satisfying certain curvature conditions. The chapter 7 extends this correspondence on the cohomological level whereas the chapter 8 explores its infinitesimal version ; it links curvature of the connexion with thickening (in the sense of LeBrun) of the bundle along the lines
Wörmke, Stephan. "Fourier transform microwave studies of small molecules and molecular complexes : measurements on HD¹²C¹⁶O, on 2-methylpyridine and its complex with Argon /." Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4075.
Повний текст джерелаSchwab, Lukas [Verfasser], and M. [Akademischer Betreuer] Wilhelm. "Fourier transform rheology of complex, filled rubber materials / Lukas Schwab. Betreuer: M. Wilhelm." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1095665413/34.
Повний текст джерелаWong, Wilson W. K. (Wilson Wai Keung) Carleton University Dissertation Engineering Electrical. "A fast fourier transform radix-2 complex butterfly with built-in self-test." Ottawa, 1992.
Знайти повний текст джерелаChagnon-Lessard, Sophie. "Cellular Responses to Complex Strain Fields Studied in Microfluidic Devices." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37915.
Повний текст джерелаLane, Pierre M. "The complex-valued optical Fourier transform and its application to moving-object trajectory estimation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/NQ48296.pdf.
Повний текст джерелаSmith, Kimberley Hazel. "Fast Fourier transform and dynamic imaging of caveolar complex arrays in active striated muscle." Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/8767.
Повний текст джерелаFink, Michael Charles. "Molecular Fourier imaging correlation spectroscopy for studies of molecular diffusion /." view abstract or download file of text, 2006. http://wwwlib.umi.com/cr/uoregon/fullcit?p3211214.
Повний текст джерелаTypescript. Includes vita and abstract. Includes bibliographical references (leaves 104-111). Also available for download via the World Wide Web; free to University of Oregon users.
Ramström, Margareta. "Analysis of Complex Biological Samples using Liquid Chromatography-Fourier Transform Ion Cyclotron Resonance Mass Spectrometry." Doctoral thesis, Uppsala University, Analytical Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5729.
Повний текст джерелаStudies of protein and peptide expression are vital in order to understand complex biological systems. As demonstrated in this thesis, on-line packed capillary liquid chromatography-Fourier transform ion cyclotron resonance mass spectrometry (LC-FTICR MS) is a useful analytical tool for such studies.
A proteomics method, based on global tryptic digestion and subsequent separation and detection of the peptides by LC-FTICR MS, was developed for qualitative analysis of body fluids. Initial experiments on cerebrospinal fluid (CSF) provided results that were comparable or superior to those achieved by more time- and sample-consuming techniques. The method was also successfully applied on plasma and amniotic fluid. One of the major challenges in proteomics is the broad dynamic range of proteins in biological matrices. The advantages of removing high-abundant components from CSF and plasma prior to MS were demonstrated.
In order to search for potential biomarkers, mass chromatograms of CSF from patients suffering from amyotrophic lateral sclerosis (ALS) and controls were compared using an in-house constructed pattern recognition program. ALS-specific patterns were observed, and four out of five unknown samples were correctly assigned. Alternative strategies to quantitatively compare two pools of samples rely on differential chemical labeling. The performance of one such method, quantification-using-enhanced-signal-tags, was investigated in complex sample analysis. The experimental intensity ratios were proven to be consistent with the prepared concentration ratios of abundant proteins in CSF.
Finally, the thesis reports on the first experiments where electron capture dissociation (ECD) was successfully incorporated in on-line LC-MS experiments. ECD and nozzle-skimmer fragmentation were applied to a sample of endocrine peptides extracted from mouse pancreatic islets. The two fragmentation methods provided complementary information. However, the method needs further optimization before it can be applied in the analysis of more complex samples, such as body fluids.
Tse, Chung Fai Norman. "The development of complex continuous wavelet transform based harmonic analysis and dynamic waveform reconstruction algorithms." Thesis, City University London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.446448.
Повний текст джерелаCastellano, Gabriela. "Investigation and application of a complex wavelet transform algorithm for the estimation of optical flow." Thesis, King's College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391765.
Повний текст джерелаSerafin, Michal M. "Fourier-transform microwave spectroscopy of cyclopropylmethylgermane and van der Waals complexes of fluorinated methanes /." View online, 2008. http://repository.eiu.edu/theses/docs/32211131400051.pdf.
Повний текст джерелаBetah, Mohamed Haye. "Un théorème de Gallagher pour la fonction de Möbius." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0461/document.
Повний текст джерелаThe Möbius function is defined by$$\mu(n)= \begin{cases} 1 & \textit{if $n=1$},\\ (-1)^k& \textit{if n is a product of k distinct prime numbers,}\\ 0 & \textit{if n contains a square factor. } \end{cases}$$We demonstrate that for $x \ge \exp( 10^9) $ and $h=x^{1-\frac{1}{16000}}$, it exists in each interval $[x-h,x]$ integers $n_1$ with $\mu(n_1)=1$ and integers $n_2$ with $\mu(n_2)=-1$.\\This result is a consequence of a more general result. \\For $x \ge \exp(4\times 10^6)$, $\frac{1}{\sqrt{\log x}} \le \theta \le \frac{1}{2000}$, $h=x^{1-\theta}$ et $Q=(x/h)^{\frac{1}{20}}$, we have \\ $$\sum_{q \leq Q} \log(Q/q)\sum_{\chi mod q}^*\left| \sum_{x-h \le n \le x} \mu(n) \chi(n) \right| \leq 10^{20} h \theta \log(x) \exp( \frac{-1}{300 \theta}); $$the sum $\sum^*$ relating to primitive characters except for possible exceptional character.\\And in particular for $x \ge \exp( 10^9)$,$$\left | \sum_{x-.x^{1-\frac{1}{16000}}\le n \le x} \mu(n) \right | \le \frac{1}{100} x^{1-\frac{1}{16000}}.$$
Ami, Diletta. "Microspectroscopie infrarouge de systèmes biologiques complexes." Reims, 2004. http://www.theses.fr/2004REIMP201.
Повний текст джерела@In this thesis the application of FT-IR microspectroscopy to the study of complex biological systems has been studied. In addition to the FT-IR studies of microorganisms of clinical interest such as Candida and E. Coli belonging to different strains, in this thesis emphasis has been laid on the power of FT-IR microspectroscopy in biotechnology. In particular, the aggregation of proteins in situ in E. Coli cells as inclusion bodies has been studied with the aim of monitoring the expression of heterologous proteins in intact cells in order to identify the most expressing strain. Furthermore, a preliminary absorption study on the nematode C. Elegans - an important model system in biotechnology - has been performed by FT-IR microspectroscopy. This study has allowed the discrimination of nematodes belonging to different taxa in agreement with classification method based on molecular biology - a result which is of growing interest in environmental, agriculture and clinical sciences
Bernardes, Alexandre Paciencia. "Um esquema completo de proteção diferencial de transformadores para testes em um relé digital." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-16072006-122259/.
Повний текст джерелаThis dissertation presents a complete procedure of simulation of digital differential protection applied to power transformers, focusing on its use to evaluate of the behavior of commercially available relays. Software ATP (Alternative Transients Program) was chosen as a tool for the simulation of distinct situations in a differential protection system applied to a 25 MVA three-phase transformer. Amongst the evidenced occurrences internal and external fault conditions, energization with or without internal fault of a three-phase transformer, overexcitation and CT (Current Transformer) saturation conditions were distinguished. It should be mentioned that from simulations to the characterization the real situations on the relay in test, a pre-processing and analysis of the information were necessary, and will be justified in the present study, denoting a common test procedure to be adopted to this philosophy of protection
Bowlyn, Kevin Nathaniel. "IMPLEMENTATION OF A NOVEL INTEGRATED DISTRIBUTED ARITHMETIC AND COMPLEX BINARY NUMBER SYSTEM IN FAST FOURIER TRANSFORM ALGORITHM." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/dissertations/1470.
Повний текст джерелаAbreu, Caio Cesar Enside de [UNESP]. "Melhoramento de sinais de voz baseado na identificação de padrões ruidosos." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/149986.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho propõe contribuir com pesquisas em melhoramento de voz (MV) por meio do estudo de diversos tipos de algoritmos baseados em Fourier e wavelets, assim como o desenvolvimento de uma ferramenta para a identificação e classificação do ruído, culminando com uma nova metodologia. Denominada "Conjunto de Métodos de Melhoramento de Voz (CMMV)'', a metodologia consiste em utilizar um banco de dados com sentenças contaminadas com vários tipos de ruídos reais, ajustando, em modo off-line, vários métodos de MV para cada tipo de ruído. Os melhores métodos para cada tipo de ruído são selecionados para compor o conjunto de métodos. Durante a operação, em modo on-line, um classificador de ruído prediz o tipo de ruído presente no sinal em processamento e então o melhor método é escolhido dentro do CMMV construído. Seis tipos de ruídos foram utilizados durante as simulações e os métodos que obtiveram melhor desempenho frente a cada tipo foram indicados por meio de análise objetiva. Constatou-se que o desempenho desses métodos pode variar de acordo com o tipo do ruído de fundo, confirmando que o desenvolvimento de algoritmos que trabalham eficientemente em qualquer ambiente ruidoso, incorporando classificação de ruído, é uma tendência. O classificador de ruídos desenvolvido nesta pesquisa tem como base um sistema imunológico artificial e características extraídas por uma análise multiescala fornecida pela transformada wavelet complexa. Com uma acurácia média de 96,29% para os seis tipos de ruído considerados e tempo de resposta médio de 6,9 milissegundos, o classificador desenvolvido se mostrou viável para implementações e utilização em conjunto com outras tecnologias. Explorando algumas das possibilidades e benefícios do processamento baseado na classificação do ruído, a seguinte questão foi levantada: "seria possível realizar uma razoável estimação do ruído a partir do sinal de voz ruidoso por meio de regressão?”. Esta questão surgiu durante o desenvolvimento da pesquisa, pois o bom funcionamento de métodos de MV depende de uma boa estimação do perfil do ruído. As simulações mostram que este tipo de estimação de ruído pode gerar resultados satisfatórios com menor custo computacional. Por fim, comparado aos métodos clássicos, o CMMV mostrou-se tão ou mais eficiente quanto.
Abreu, Caio Cesar Enside de. "Melhoramento de sinais de voz baseado na identificação de padrões ruidosos /." Ilha Solteira, 2017. http://hdl.handle.net/11449/149986.
Повний текст джерелаResumo: Este trabalho propõe contribuir com pesquisas em melhoramento de voz (MV) por meio do estudo de diversos tipos de algoritmos baseados em Fourier e wavelets, assim como o desenvolvimento de uma ferramenta para a identificação e classificação do ruído, culminando com uma nova metodologia. Denominada "Conjunto de Métodos de Melhoramento de Voz (CMMV)'', a metodologia consiste em utilizar um banco de dados com sentenças contaminadas com vários tipos de ruídos reais, ajustando, em modo off-line, vários métodos de MV para cada tipo de ruído. Os melhores métodos para cada tipo de ruído são selecionados para compor o conjunto de métodos. Durante a operação, em modo on-line, um classificador de ruído prediz o tipo de ruído presente no sinal em processamento e então o melhor método é escolhido dentro do CMMV construído. Seis tipos de ruídos foram utilizados durante as simulações e os métodos que obtiveram melhor desempenho frente a cada tipo foram indicados por meio de análise objetiva. Constatou-se que o desempenho desses métodos pode variar de acordo com o tipo do ruído de fundo, confirmando que o desenvolvimento de algoritmos que trabalham eficientemente em qualquer ambiente ruidoso, incorporando classificação de ruído, é uma tendência. O classificador de ruídos desenvolvido nesta pesquisa tem como base um sistema imunológico artificial e características extraídas por uma análise multiescala fornecida pela transformada wavelet complexa. Com uma acurácia média de 96,29% para os seis... (Resumo completo, clicar acesso eletrônico abaixo)
Doutor
Anupriya, Anupriya. "Gas Phase Structure Characterization Using Fourier Transform Ion Cyclotron Resonance Mass Spectrometry." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6447.
Повний текст джерелаRouleau, Caroline. "Implications du pyruvate dans le métabolisme de lignées astrocytaires spinales spontanément transformées." Montpellier 1, 2006. http://www.theses.fr/2006MON1T029.
Повний текст джерелаOliveira, Francisco Ivan de. "Transformada de Hilbert Sobre Bases de Wavelets: DetecÃÃo de Complexos QRS." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8599.
Повний текст джерелаA tarefa mais importante em processamento de sinais de eletrocardiograma (ECG) à a determinaÃÃo exata do complexo de QRS, em particular, a detecÃÃo dos picos de onda R atravÃs de sistemas e anÃlises computadorizadas. à essencial, especialmente, para uma medida correta da variabilidade do ritmo cardÃaco (HRV). Um grande obstÃculo a ser superado para uma detecÃÃo confiÃvel à a sensibilidade do eletrocardiograma a diversas fontes de distÃrbio, tais como, a interferÃncia à rede elÃtrica, os artefatos do movimento, flutuaÃÃo da linha base e o ruÃdo dos mÃsculos. Este trabalho utiliza as propriedades matemÃticas da transformaÃÃo de Hilbert sobre wavelets para desenvolver um novo algoritmo capaz de diferenciar as ondas R das demais (P, Q, S, T e U) e facilitar a detecÃÃo dos complexos QRS. Uma taxa de detecÃÃo do complexo QRS de 99,92% à alcanÃada para a base de dados de arritmias do MIT-BIH. A tolerÃncia a ruÃdo do mÃtodo proposto foi tambÃm testada usando os registros padrÃo da base de dados MIT-BIH Noise Stress Test. A taxa da detecÃÃo do detector ficou aproximadamente 99,35% mesmo para as relaÃÃes sinal-ruÃdo (SNR) tÃo baixo quanto 6dB.
The most important task in the ECG signal processing is the accurate determina-tion of QRS complex, in particular, accurate detection of the R wave peaks, is essential in computer-based ECG analysis especially for a correct measurement of Heart Rate Variability (HRV). A great hurdle to be overcome in reliable detection is the sensibility of the electrocar-diogram to several disturbance sources such as powering source interference, movement arti-facts, baseline wandering and muscle noise. This study uses the Hilbert Transform pairs of wavelet bases for QRS detection. From the properties of these mathematical tools it was pos-sible to develop an algorithm which is able to differentiate the R waves from the others (P, Q, S, T and U waves).The performance of the algorithm was verified using the records MIT-BIH arrhythmia and normal databases. A QRS detection rate of 99.92% was achieved against MIT-BIH arrhythmia database. The noise tolerance of the proposed method was also tested using standard records from the MIT-BIH Noise Stress Test Database. The detection rate of the detector remains about 99.35% even for signal-to-noise ratios (SNR) as low as 6dB.
Doumenq, Pierre. "Apport de l'infrarouge à transformée de Fourier et du couplage chromatographie gazeuse-infrarouge à transformée de Fourier à l'étude de systèmes chimiques complexes." Aix-Marseille 3, 1989. http://www.theses.fr/1989AIX30021.
Повний текст джерелаZhang, Yarui. "Non-linear electromagnetic imaging : from sparsity-preserving wavelet-based algorithms to deep learning." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPAST167.
Повний текст джерелаThis work deals with nonlinear ill-posed electromagnetic imaging from time-harmonic data within a two-dimensional scattering experiment, the focus being on two approaches in the framework of the contrast-source inversion (CSI). The first approach is a group sparsity penalized CSI in the wavelet domain, the second is an unrolled deep learning scheme. In the first approach, dependency exists between wavelet coefficients at different scales, referred to as parent-child relationship, which yields a wavelet quadtree structure so that wavelet coefficients are both pixel-wise and group-wise sparse. Emphasis is on the dual-tree complex wavelet transform (CWT) to achieve this result. A '2;1 norm added to the standard cost function is to enforce group sparsity onto the wavelet coefficients of the spatially-varying contrast. The replication strategy is combined with the proximal method to solve the overlapping group penalized problem. The second approach is inspired by the unrolled method. By embedding the CSI iterations into the deep learning model, the domain knowledge is incorporated into the learning process. In both cases, thorough numerical tests are carried out to evaluate performance, stability, robustness, and reliability with comparisons with more standard solutions (like CSI, discrete wavelet transform (DWT) and U-net), which exhibit the advantage of the proposed approaches under many aspects
Ngari, Mwaniki Silas. "Fourier transform microwave rotational spectra of van der Waals complexes of N¦2O." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0031/NQ46894.pdf.
Повний текст джерелаKlingspor, Måns. "Hilbert Transform : Mathematical Theory and Applications to Signal processing." Thesis, Linköpings universitet, Matematik och tillämpad matematik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122736.
Повний текст джерелаZhang, Yi. "Spatially Non-Uniform Blur Analysis Based on Wavelet Transform." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1292527349.
Повний текст джерелаZhang, Haizhen. "Characterization of Cucurbituril Complex Ions in the Gas Phase Using Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1582.pdf.
Повний текст джерелаLeon, Nick. "Complex city systems : how cities are using technological systems to transform and compete in a global knowledge based economy." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/11516.
Повний текст джерелаBenigni, Paolo. "Trapped Ion Mobility Spectrometry coupled to Fourier Transform Ion Cyclotron Resonance Mass Spectrometry for the analysis of Complex Mixtures." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3547.
Повний текст джерелаConnelly, James Patrick. "Microwave studies of Van der Waals complexes." Thesis, University of Oxford, 1993. http://ora.ox.ac.uk/objects/uuid:3865eb1d-d288-44c9-8d42-84f7ff2c0608.
Повний текст джерелаMoudens, Audrey. "Formation de complexes moléculaires hydratés appliquée aux sciences planétaires." Rennes 1, 2010. http://www.theses.fr/2010REN1S210.
Повний текст джерелаClathrate hydrates are crystalline compounds consisting of guest molecules of gas trapped inside cages of hydrogen bonded water molecules. They are suspected to be present on icy planetary surfaces in the solar system, where thermodynamics conditions are favorable to their stability. We showed by simulations that they can exist on the surfaces of Pluto and Triton. Astrophysical models established that these crystalline structures could be incorporated in planetesimals in the solar nebula, from which planets formed. The aim of my work was to check this hypothesis, reproducing low temperature (10-100 K) and low pressure (10-5-10-4 mbar) conditions of the solar nebula, using supersonic expansion of water vapour and gas mixtures. Fourier Transform Infrared Absorption Spectroscopy was used to retrieve nature and dynamics of molecular complexes formed in the supersonic jet. Under some conditions, mixed condensate of water vapour and argon was observed. The interpretation of the infrared spectra based on quantum chemistry calculations, revealed that on the typical timescale of 100 µs during the expansion, argon atoms surround water aggregates, while they would have been trapped inside cages of hydrogen bonded water molecules in the case of a clathrate structure. This result do not necessarily compromise the formation of clathrate hydrates in the jet, but means that longer times are needed to the rearrangement of molecules toward a clathrate structure. A second study was realized using Jet-AILES apparatus at Synchrotron Soleil, with a gaseous mixture of water vapour and carbon dioxide. Heterogeneous complexes (H2O)m-(CO2)n and (CO2)n were detected at high resolution. The transport of dusty particles in the solar nebula by photophoresis was also investigated. Our simulations showed that dusty particles are able to reach large heliocentric distances under the photophoretic effect. It confirms the hypothesis of accretion of high temperature minerals by comets in the outer part of the solar nebula. Finally, high temperature spectroscopy of acetylene, molecule formed in the circumstellar envelopes of cold carbon stars, is presented. The high enthalpy source previously designed in the laboratory was used to produce high resolution spectra of acetylene between 870 K and 1455 K. The simulation of spectra with the help of a radiative transfer model revealed that the optical thickness of the probed gas sample affected the intensity ratio between ortho and para lines. This anomaly turned out to be a good way to estimate the acetylene concentration in the samples and can be used to characterize circumstellar envelopes
Camargo, Rubens de Figueiredo. "Do teorema de Cauchy ao metodo de Cagniard." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307011.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica
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Resumo: Este trabalho versa sobre variaveis complexas, em particular sobre o teorema integral de Cauchy, suas consequencias e aplicações. Como consequencia do teorema integral de Cauchy temos o teorema dos residuos, peça chave para o desenvolvimento deste trabalho. Nas aplicações nos concentramos no estudo das transformadas integrais como metodologia na resolução de equações diferenciais parciais, em particular no calculo da inversão das transformadas de Laplace, Fourier e Hankel, bem como na justa posição das transformadas. Para inversão da justa posição das transformadas nos concentramos no metodo de Cagniard e algumas de suas variações
Abstract: This work is about complex variables, in particular about Cauchy¿s integral theorem and its consequences and applications. We have, as consequences of Cauchy¿s integral theorem, Cauchy¿s theorem and the residue theorem, a keynote to the development of this work. As for the applications, our main objective was to study the integral transforms as a method to solve partial differential equations and, specifically, the inversion of the Laplace, Fourier and Hankel transforms, in the same way, the juxtaposition of transforms. In order to invert the juxtaposition of transforms our main concern was to study Cagniard¿s method and some of its variations
Mestrado
Matematica Aplicada
Mestre em Matemática
Febrer, Pedro Maria Ulisses dos Santos Jalhay. "Residue sum formula for pricing options under the variance Gamma Model." Master's thesis, Instituto Superior de Economia e Gestão, 2020. http://hdl.handle.net/10400.5/20802.
Повний текст джерелаO resultado principal desta dissertação é a demonstração da fórmula de serie de soma tripla para o preço de uma opção Europeia induzido por um processo Variance Gamma. Com esta intenção, apresentamos certas propriedades e noções sobre processos de Lévy e análise complexa multidimensional, dando ênfase à aplicação do cálculo de resíduos ao integral Mellin-Barnes. Subsequentemente, iremos construir a representação na forma do integral Mellin-Barnes, em C^3, para o preço de uma opção e, apoiados pelo anteriormente mencionado cálculo de resíduos, deduziremos a representação em serie de soma tripla para o preço de uma opção Europeia e os seus correspondentes gregos. Para terminar, dando uso à nova formula, serão computados e discutidos alguns valores para um caso de estudo particular.
The main result of this dissertation is the proof of the triple sum series formula for the price of an European call option driven by the Variance Gamma process. With this intention, we present some notions and properties of Lévy processes and multidimensional complex analysis, with emphasis on the application of residue calculus to the Mellin-Barnes integral. Subsequently, we construct the Mellin-Barnes integral representation, in C^3, for the price of the option and, buttressed with the aforementioned residue calculus, we deduce the triple sum series representation for the price of the European option and its corresponding greeks. Finally, with the use of the new formula, some values for a particular case study are computed and discussed.
info:eu-repo/semantics/publishedVersion
Liang, Zhenmin. "High precision Fourier transform ion cyclotron resonance mass spectral analysis of polymers and metal complexes /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487685204968068.
Повний текст джерелаGrigorean, Gabriela. "Chiral studies of non-covalent complexes by electrospray ionization (ESI) Fourier transform mass spectrometry (FTMS) /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.
Повний текст джерелаAhmed, Abdelwahab Ibrahim. "Protein secondary structure of the isolated photosystem II (PSII) particles and light-harvesting complex (LHCII) studied by Fourier transform infrared spectroscopy." Thèse, Université du Québec à Trois-Rivières, 1996. http://depot-e.uqtr.ca/6803/1/000626119.pdf.
Повний текст джерелаAragão, Gilton Alves. ""Agroindústria e cooperativismo na Bahia" : uma análise do complexo agroindustrial baiano e das possibilidades das cooperativas agrícolas transformá-lo." Faculdade de Economia, 1988. http://repositorio.ufba.br/ri/handle/ri/23296.
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A questão básica que se pretende discutir, é se o cooperatismo pode significar uma alternativa capaz de contribuir para transformar a agricultura e agroindústria do Estado da Bahia.
YVER, BEATRICE. "Analyse de matrices organiques complexes par couplage de la chromatographie en phase supercritique avec l'infrarouge a transformee de fourier." Paris 6, 1996. http://www.theses.fr/1996PA066438.
Повний текст джерелаРоманишен, Олег Валерійович, та Oleh Romanyshen. "Розробка заходів забезпечення безперебійної роботи електричного обладнання підприємства з переробки молока". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, кафедра електричної інженерії,Тернопіль, Україна, 2020. http://elartu.tntu.edu.ua/handle/lib/33492.
Повний текст джерелаВ кваліфікаційній роботі проведено визначення категорії по надійності електропостачання та характеристика споживачів електричної енергії. Здійснено розрахунок навантаження та вибір схеми електропостачання. Здійснено розрахунок та вибір пристрою компенсації. Проведено вибір потужності та числа трансформаторів на ПС. Здійснена розробка конструкції КТП. Здійснено розрахунки та вибір розподільної електричної мережі.
The qualification work defines the category of reliability of electricity supply and characteristics of electricity consumers. The load is calculated and the power supply scheme is selected. The calculation and selection of the compensation device is performed. The power and number of transformers on the substation were selected. The design of KTP is developed. Calculations and selection of the electrical distribution network have been performed
ВСТУП …6 1 АНАЛІТИЧНИЙ РОЗДІЛ ...9 1.1 Огляд підприємства …9 1.1.1 Загальні дані…9 1.1.2 Обґрунтування технології виробництва…10 1.1.3 Виробництво сиру…10 1.1.4 Технологія виробництва сиру…13 1.1.5 Холодопостачання…17 1.1.6 Рівень механізації та автоматизації виробництва…18 1.1.7 Штат працівників. Графік роботи…19 1.2 Огляд спліт-системи…19 1.3 Поняття та класифікація відмов…21 1.4 Особливості системи та елемента в теорії надійності…23 2 РОЗРАХУНКОВО–ДОСЛІДНИЦЬКИЙ РОЗДІЛ ...25 2.1 Проектування системи електроосвітлення заводу…25 2.1.1 Види освітлення…25 2.1.2 Світлотехнічний розрахунок робочого освітлення …25 2.1.3 Світлотехнічний розрахунок робочого освітлення за допомогою методу коефіцієнта використання на прикладі приміщення № 15…26 2.1.4 Аварійне освітлення…36 2.2 Проектування мережі електропостачання…37 2.2.1 Вибір силових розподільних пунктів …37 2.2.2 Вибір кабелів 0,4 кВ…45 2.2.3 Розрахунок кабельної лінії…45 2.2.4 Вибір комутаційних апаратів 0,4 кВ…46 2.3 Висновки до розділу…47 3 ПРОЕКТНО-КОНСТРУКТОРСЬКИЙ РОЗДІЛ ....48 3.1 Проектування блискавкозахисту будівлі… 48 3.1.1 Коротка характеристика об’єкту...48 3.1.2 Необхідність виконання блискавкозахисту...48 3.1.3 Влаштування системи блискавкоприймачів....49 3.1.4 Влаштування системи струмовідводів...51 3.1.5 Влаштування системи заземлення...52 3.1.6 Монтаж блискавкоприймачів...53 3.1.7 Монтаж струмовідводів...53 3.1.8 Монтаж заземлювачів...54 3.1.9 Експлуатація та технічне обслуговування системи блискавкозахисту...55 3.2 Вибір типу і потужності трансформаторів...55 3.2.1 Порівняльний розрахунок трансформаторів...55 3.2.2 Коротка інформація про Комплектну трансформаторну підстанцію КТПГСМ...59 3.3 Вибір пристрою компенсації реактивної напруги...64 3.4 Висновки до розділу...65 4 ОХОРОНА ПРАЦІ ТА БЕЗПЕКА В НАДЗВИЧАЙНИХ СИТУАЦІЯХ... 66 4.1. Загальні положення інструкції з охорони праці для електрика... 66 4.2. Вимоги безпеки для електрика перед виконанням робіт...69 4.3. Вимоги безпеки під час виконання електриком робіт...69 4.4. Вимоги безпеки для електрика після закінчення робіт...73 4.5.Вимоги безпеки для електрика в аварійних ситуаціях...73 ЗАГАЛЬНІ ВИСНОВКИ ...74 ПЕРЕЛІК ПОСИЛАНЬ ...75 ДОДАТКИ...1 Додаток А. Порівняльний розрахунок трансформаторів...2