Acceleration Techniques
Mostrando 25-36 de 47 artigos, teses e dissertações.
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25. A study of steel bar reinforcement corrosion in concretes with SF and SRH using electrochemical impedance spectroscopy
Several electrochemical techniques can be used to monitor corrosion, among them are open circuit potential (OCP) and eletrochemical impedance spectroscopy (EIS). Monitoring OCP is the most typical procedure for routine inspection of reinforced concrete structures and can be easily carried out, however it only gives an approximate idea of the corrosion proces
Materials Research. Publicado em: 2006-06
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26. AN ARCHITECTURE FOR PHOTOREALISTIC IMAGE SYNTHESIS BASED ON MONTE CARLO TECHNIQUES / UMA ARQUITETURA PARA SÍNTESE DE IMAGENS FOTORREALISTAS BASEADA EM TÉCNICAS DE MONTE CARLO
One of the main goals in computer graphics is to create photorealistic images, that is, images indistinguishable from the ones captured by a real camera, or, more ambitiously, images that cause the same sensation on the visual system of an observer looking directly at a scene. Applications include illumination design, architecture, virtual reality and the mo
Publicado em: 2006
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27. ESTABILIDADE E DEFORMAÇÃO DE TALUDES DE SOLO SOB CARREGAMENTO SÍSMICO / STABILITY AND DEFORMATION OF SOIL SLOPES UNDER SEISMIC LOAD
The seismic stability of slopes has been a topic of considerable interest in geotechnical engineering for the past 40 years. During that period, the state of practice has moved from simples techniques to more complicated numerical procedures. The simplest approach is the pseudo-static analysis in which the earthquake load is simulated by an equivalent static
Publicado em: 2006
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28. Velocidade e montagem: possibilidades de comunicação do tempo no cinema
The objective of this research is to reflect on the possibilities of the asceleration of time in media film products produced after the 90s. The chosen method was film analysis, aplyed to a case study of a brazilian movie, O Invasor, directed by Beto Brant (2001). The analysis of the editing tactics that articulates the acceleration of time on the movie was
Publicado em: 2006
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29. Overweightness and obesity in 7 to 10-year-old students in Ubá-MG / Sobrepeso e obesidade em escolares de 7 a 10 anos de idade em Ubá-MG
The rapid acceleration in the prevalence of child obesity is an alarming factor for being associated with several metabolic disturbances, besides being a strong predictor of obesity in adult life. The objective of the study was to analyze the occurrence of overweightness and obesity and the impact on biochemical indicators and blood pressure in a group of 7-
Publicado em: 2006
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30. ENVIRONMENTAL PASSIVE IN RURAL PROPRIETIES: FLOWERS ISLAND - POA RS / PASSIVO AMBIENTAL EM PROPRIEDADES RURAIS: ILHA DAS FLORES PORTO ALEGRE RS
The acceleration of the global economy and shifting demographic changes has caused an uncontrolled exploration of the worlds natural renewable and non-renewable resources. Not only have the levels of these resources decreased but so has the quality. In addition to these changes, the future development of natural ecosystems could also be compromised as they a
Publicado em: 2006
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31. CONTROLE DE ACELERAÇÃO DE UMA MÁQUINA DE VIBRAÇÃO ELETRODINÂMICA / ACCELERATION CONTROL OF AN ELECTRODYNAMIC VIBRATION MACHINE
This work presents the development of a novel digital acceleration controller for sinusoidal vibration tests using switching-mode AC power source (ACPS) fed electrodynamic vibration machines. The proposed scheme is based on the interaction of two control loops: one for the shaker s acceleration regulation and another for the ACPS output voltage control. A ro
Publicado em: 2005
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32. Estimulação eletrica, tipo de desossa e taxas de resfriamento da carne bovina (MM. Longissimus Lumborum e Semitendinosus) : efeitos em caracteristicas fisicas, fisico-quimicas, sensoriais e bacteriologicas / Electrical stimulation, type of boning and chilling rates of bovine meat ( (MM. Longissimus Lumborum and Semitendinosus)
Technologies for the acceleration of the conversion of muscle into meat are used by some of the most important countries in the production and export of meat (Australia, New Zealand) whereas this still not happens in Brazil. This study was conducted with the aim of evaluating some of the techniques of accelerated meat production such as electrical stimulatio
Publicado em: 2005
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33. Techniques for the estimation of angular FRFs in modal testing with applications to beam type structures / Técnicas para estimativa de FRFS angulares em análise modal experimental com aplicações a estruturas do tipo viga
Este trabalho realiza uma investigação sobre técnicas experimentais para a determinação de Funções de Resposta em Freqüência (FRFs) angulares com aplicações em estruturas do tipo viga. Estas FRFs são definidas considerando-se como variável de saída o movimento angular (deslocamento, velocidade ou aceleração) exibido pela estrutura sob estudo
Publicado em: 2003
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34. MULTI-RESOLUTION FOR VISUALIZATION OF NATURAL OIL RESERVOIRS / MULTI-RESOLUÇÃO PARA A VISUALIZAÇÃO DE RESERVATÓRIOS NATURAIS DE PETRÓLEO
Current flow-simulation meshes of natural oil reservoirs (NOR) are composed of hundreds of thousands of hexahedral cells. The visualization of the geometry of these cells superimposed with color attributes to represent properties and flow results requires the rendering of an unstructured mesh of millions of triangles. Current graphics hardware does not allow
Publicado em: 2002
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35. Modelos hibridos de colunas de destilação
Techniques like online process optimization and model predictive control require fast simulations of the process models used. However, in some cases the process models are very complex or have a high dimension. In these cases acceleration techniques that include order reduction and model simplification can be used to obtain fast enough simulations. Distillat
Publicado em: 2002
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36. Three-dimensional turbulent flow simulations over aerospace configurations.
The main objective of the present research work consists of studying turbulent flows over typical aerospace configurations. In order to accomplish such goal, a numerical tool to simulate 3-D compressible flows is validated and improved. A finite difference method for structured grids, written for general curvilinear coordinates, is used. A centred spatial di
Publicado em: 2002