935 resultados para On-line Prediction


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Torsional vibration predictions and measurements of a marine propulsion system, which has both damping and a highly flexible coupling, are presented in this paper. Using the conventional approach to stress prediction in the shafting system, the numerical predictions and the experimental torsional vibration stress curves in some parts of the shafting system are found to be quite different. The free torsional vibration characteristics and forced torsional vibration response of the system are analyzed in detail to investigate this phenomenon. It is found that the second to fourth natural modes of the shafting system have significant local deformation. This results in large torsional resonant responses in different sections of the system corresponding to different engine speeds. The results show that when there is significant local deformation in the shafting system for different modes, then multi-point measurements should be made, rather than the conventional method of using a single measurement at the free end of the shaft, to obtain the full torsional vibration characteristics of the shafting system.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Comunicação - FAAC

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Pós-graduação em Design - FAAC

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Ciência da Informação - FFC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This paper presents a comparative study of the critical pickup and saltation velocities of particles in horizontal pipelines for pneumatic conveying design. A comparative study is performed using different existing correlations in the literature for the determination of the minimum velocity of transport as a function of the particle and pipe diameter, particle density, solid mass flow rate and particle sphericity. Their limitations and difficulties in predicting those critical velocities are analyzed. For the pickup velocity, an experimental study was also carried out in order to support the analysis. Recommendations are presented on the use of such correlations.

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Esta investigación da énfasis a la formación y consolidacón del Proyecto Memoria Votorantim (P.M.V.), presentado al gran publico en 2005, con la publicación de su sitio en la WEB. El ejecentral fundamental es compreender su “arquitetura” y los contenidos específicos de sus distintas secciones, i indentificando los conjuntos informativos los repertoriod documentale que lo intgran, buscando entender los propósitos de su constituicón, La hipótese del trabajo es que la concepción del contenido documental y la desponición de las inforaciones archivistas que cundujeron al yuxtaposición del recuerdo de los trabajadores con el recuerdo corporativo produciendo la história oficial del Grupo Votorantim. Se busca discutir la constituición del P.M.V. como parte de las estratégias del crescimento de los negocios de la Votorantim anunciados en 2004, edificando la tradición del Grupo Votorantim y actuando como refuerzo y amliación de la corporativa de sus empleados.

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In relation to the changes that mark the trajectory of libraries catalogs, this paper aims to describe the challenges that go beyond the current status of librarians, in relation to use of the on-line catalog as the main tool storage and retrieval of documentary information. Using literature specialized is intended to contribute to the discussion of the topic, in order to understand the challenges and prospects of using this important tool for search and information retrieval.