Boundary Detection
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Numerical analysis of thermal and electrohydrodynamic effects in travelling-wave dielectrophoretic devices
Travelling-wave dielectrophoretic phenomena involving cell detection and manipulation are very interesting for biomedical and biotechnological applications. However, electrohydrodynamic phenomena may interfere with the action of dielectrophoresis. The main goal of our study is to calculate the interplay of these effects. In so doing, we have been able to go
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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14. Desenvolvimento de um novo algoritmo para análise viscoplástica com o método dos elementos de contorno. / Development of a new boundary elements algorithm for viscoplastic analysis.
The search for new mathematical models and innovative techniques for numerical analyses has been subject of many research studies. In analysis of models with infinite and semi-infinite domains, the Boundary Element Method (BEM) has been proved to be one of the most efficient numerical tools. On the other hand, in nonlinear analyses the BEM requires the evalu
Publicado em: 2007
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15. Análise de conteúdo de vídeo por meio de aprendizado ativo
Advances in compression techniques, decreasing cost of storage, and high-speed transmission have facilitated the way videos are created, stored and distributed. As a consequence, videos are now being used in many applications areas. The increase in the amount of video data deployed and used in today s applications reveals not only the importance as multimedi
Publicado em: 2007
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16. Um modelo consistente para o processo de fotocontagem contínua e medidas de emaranhamento de sistemas quânticos de variáveis contínuas.
This dissertation embraces two trends of research in modern quantum optics. The first of them is connected to the photodetection theory, particularly to the continuous measurement theory developed by Srinivas and Davies (SD) in 1980s, whose principal ingredient is the correct choice of the quantum jump superoperator. We deduce from first principles diff
Publicado em: 2005
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17. Análise das características dos relâmpagos na região sudeste do Brasil / Lightning characteristics in southeastern Brazil
The first climatological studies of cloud-to-ground (CG) lightning flashes characteristics in Brazil were published at the middle of 90. However, at that time, the lightning detection network used to be composed by only a few sensors, which restricted the analyses to some specific regions. In the beginning of this decade, new studies were published using lig
Publicado em: 2005
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18. Shot-boundary detection on video / "Segmentação automática de tomadas em vídeo"
Visual content based information retrieval is an area of increasing importance due to the large volume of available material (digital images and videos), shared and distributed mainly by the internet, and the processing power achieved by personal computer in the last ten years. New ways to consume digital video and to manipulate and explore its visual inform
Publicado em: 2004
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19. MONITORAMENTO DA INSTRUMENTAÇÃO DA BARRAGEM DE CORUMBÁ I POR REDES NEURAIS E MODELOS DE BOX &JENKINS / MONITORING OF THE CORUMBÁ-I DAM INSTRUMENTATION BY NEURAL NETWORKS AND THE BOX &JENKINSNULL MODELS
In this work, artificial neural networks and the Box &Jenkins models (1970) were used for analysis, modeling and forecasts of water discharges and pressure head development in the Corumbá-I dam, owned by Furnas Centrais Elétricas, from the instrumentation data recorded since 1997. Prediction of the probable values can be a powerful tool for early detection
Publicado em: 2003
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20. Fast neutral lithium beam for density and its fluctuation measurements at the boundary regions of ETE tokamak
A Fast Neutral Lithium Beam Probe (FNLBP) is being developed, in order, to perform measurement of the boundary plasma density in discharges of the Spherical Tokamak ETE, recently built at LAP/INPE. This plasma diagnostic method is adequate for use in fusion devices because it does not perturb the plasma and it provides data with high space and time resolutio
Brazilian Journal of Physics. Publicado em: 2002-03
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21. Analise wavelet na simulação numerica de equações diferenciais parciais com adaptabilidade espacial
Motivated by the phenomena models in Meteorology and similar areas, the work of this thesis was developed with the objective to fonnulate a numerical method, with space adaptabitity, suitable for the computational time evolution partial differencial equation simulation. The results presented in this research enhance the properties of detection of singular st
Publicado em: 2001
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22. Left atrial size and function: assessment using echocardiographic automatic boundary detection.
OBJECTIVE--To evaluate the waveforms of left atrial area changes obtained by automated boundary detection with newly developed acoustic quantification technology. DESIGN--All subjects had measurements of left atrial areas taken in the apical four chamber, parasternal long axis, and parasternal short axis views using both conventional echocardiographic method
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23. Comparison of acoustic quantification and Doppler echocardiography in assessment of left ventricular diastolic variables.
OBJECTIVE--To assess the haemodynamic correlations of the waveforms of left ventricular area change obtained by automated boundary detection with newly developed acoustic quantification technology. DESIGN--The timing of events in the cardiac cycle was identified on the wave-form automated boundary detection and was correlated with the corresponding timing de
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24. Enzyme Immunoassay Detection of Nitrosomonas europaea
An exploratory effort to selectively detect the presence of a nitrifying bacterium, Nitrosomonas europaea, successfully demonstrated the fundamental utility of an enzyme-based immunoassay protocol. The applied polyclonal antibody test seemingly offered a marked improvement over the available analytical options, including plating, activity, and fluorescence i