Empirical Mode Decomposition
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Fault Detection in High Speed Helical Gears Considering Signal Processing Method in Real Simulation
Abstract In the present study, in order to detect the fault of the gearmeshs, two engaged gears based on research department of a major automotive company have been modeled. First off, by using the CATIA software the fault was induced to the output gear. Then, the faulty gearmesh and non-faulty gearmesh is modeled to find the fault pattern to predict and est
Lat. Am. j. solids struct.. Publicado em: 2016-11
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2. Análise de defeitos em tubos de geradores de vapor de usinas nucleares utilizando a transformada de Hilbert-Huang em sinais de inspeção por correntes parasitas / Defects diagnosis of nuclear power plant steam generator tubes using the Hilbert-Huang Transform in eddy current testing signals
Os tubos de Geradores de Vapor em Reatores Nucleares do tipo PWR são submetidos a diferentes níveis de tensões e carregamento em altas temperaturas, reduzindo sua vida útil devido o surgimento de defeitos e corrosão. A inspeção por Correntes Parasitas é um ensaio não destrutivo usado para diagnosticar defeitos de corrosão e descontinuidades na supe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/05/2012
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3. Time-frequency analysis of Hilbert spectrum of pressure fluctuation time series in a Kenics Static Mixer based on empirical mode decomposition
The turbulent flow in a Kenics Static Mixer (KSM) was intensified under the mutual-coupling effect between the twisted leaves and the tube-wall. In order to understand the intrinsic features of turbulent flow in KSM, the Hilbert-Huang Transform based on Empirical Mode Decomposition were first introduced to describe the time-frequency features of the pressure
Brazilian Journal of Chemical Engineering. Publicado em: 2012-03
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4. NÃO-ESTACIONARIEDADE DE SÉRIES TEMPORAIS TURBULENTAS E A GRANDE VARIABILIDADE DOS FLUXOS NAS BAIXAS FREQUÊNCIAS / TIME SERIES NON-STATIONARITY AND THE LARGE LOW FREQUENCY TURBULENT FLUX VARIABILITY
A complexidade de escoamentos turbulentos causa dificuldade para a descrição de fenômenos complexos, como o transporte de grandezas vetoriais e escalares na baixa atmosfera, fazendo com que a análise de dados experimentais, principalmente séries temporais, seja amplamente utilizada. O método mais utilizado pela comunidade micrometeorológica para quant
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/08/2011
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5. Atenuação de ruídos coerentes utilizando decomposição em modos empíricos
O processamento sísmico tem como principal objetivo fornecer imagem adequada das estruturas geológicas da sub-superfície de bacias sedimentares. Dentre as etapas fundamentais deste processamento está o enriquecimento das reflexões sísmicas através de filtragem de sinais indesejáveis, chamados de ruídos, a amplificação de sinais de interesse e a ap
Publicado em: 2010
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6. Investigação teórica da quimisssorção do ânion metanossulfonato em eletrodos de platina (111) e (100) via método semi-empírico
Several electrochemical processes, such as electrocatalysis of organic substrates, make use of mediators. One of the mediators is the most commonly used anion methanesulfonate, CH3SO3, which has several advantages for such use, and chemical stability considered one of them. However, experimental studies indicate the possibility of this compound suffer the ad
Publicado em: 2010
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7. Engineering analysis of biological variables: An example of blood pressure over 1 day
Almost all variables in biology are nonstationarily stochastic. For these variables, the conventional tools leave us a feeling that some valuable information is thrown away and that a complex phenomenon is presented imprecisely. Here, we apply recent advances initially made in the study of ocean waves to study the blood pressure waves in the lung. We note fi
The National Academy of Sciences.
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8. Initial Reaction(s) in Biotransformation of CL-20 Is Catalyzed by Salicylate 1-Monooxygenase from Pseudomonas sp. Strain ATCC 29352
CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane) (C6H6N12O12), a future-generation high-energy explosive, is biodegradable by Pseudomonas sp. strain FA1 and Agrobacterium sp. strain JS71; however, the nature of the enzyme(s) involved in the process was not understood. In the present study, salicylate 1-monooxygenase, a flavin adenine dinucl
American Society for Microbiology.