929 resultados para Based structure model


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This paper presents a method for indirect orientation of aerial images using ground control lines extracted from airborne Laser system (ALS) data. This data integration strategy has shown good potential in the automation of photogrammetric tasks, including the indirect orientation of images. The most important characteristic of the proposed approach is that the exterior orientation parameters (EOP) of a single or multiple images can be automatically computed with a space resection procedure from data derived from different sensors. The suggested method works as follows. Firstly, the straight lines are automatically extracted in the digital aerial image (s) and in the intensity image derived from an ALS data-set (S). Then, correspondence between s and S is automatically determined. A line-based coplanarity model that establishes the relationship between straight lines in the object and in the image space is used to estimate the EOP with the iterated extended Kalman filtering (IEKF). Implementation and testing of the method have employed data from different sensors. Experiments were conducted to assess the proposed method and the results obtained showed that the estimation of the EOP is function of ALS positional accuracy.

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Protein-protein interactions (PPIs) are essential for understanding the function of biological systems and have been characterized using a vast array of experimental techniques. These techniques detect only a small proportion of all PPIs and are labor intensive and time consuming. Therefore, the development of computational methods capable of predicting PPIs accelerates the pace of discovery of new interactions. This paper reports a machine learning-based prediction model, the Universal In Silico Predictor of Protein-Protein Interactions (UNISPPI), which is a decision tree model that can reliably predict PPIs for all species (including proteins from parasite-host associations) using only 20 combinations of amino acids frequencies from interacting and non-interacting proteins as learning features. UNISPPI was able to correctly classify 79.4% and 72.6% of experimentally supported interactions and non-interacting protein pairs, respectively, from an independent test set. Moreover, UNISPPI suggests that the frequencies of the amino acids asparagine, cysteine and isoleucine are important features for distinguishing between interacting and non-interacting protein pairs. We envisage that UNISPPI can be a useful tool for prioritizing interactions for experimental validation. © 2013 Valente et al.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Este trabalho descreve um sistema de análise de dados com a finalidade de gerar um sistema de controle utilizando técnica inteligente para adição de fluoreto de alumínio (AlF3) em fornos de redução de alumínio. O projeto baseia-se nos conceitos de lógica fuzzy, nos quais o conhecimento acumulado pelo especialista do processo é traduzido de maneira qualitativa em um conjunto de regras linguísticas do tipo SE ENTÃO. A utilização desta técnica inteligente para o controle de adição de fluoreto busca representar explicitamente um conhecimento qualitativo, detido pelos operadores de cubas eletrolíticas. Devido o sistema convencional não contemplar as variações dos fenômenos que envolvem a dinâmica do processo, um controlador fuzzy foi implmentado no sistema real para tomadas de decisões, utilizando o modelo mínimo de Mandani. Baseado neste modelo, as variáveis de processo para a entrada do sistema fuzzy, tais como temperatura de banho e percentual de fluoreto foram manipuladas para estimar a tendência de subida e descida, respectivamente, através do método mínimos quadrados(MMQ). O controlador fuzzy é aplicado para calcular a quantidade de fluoreto de alumínio (AlF3) a ser adicionado na cuba eletrolítica de forma automática sem a necessidade da intervenção do especialista do processo. A motivação para o uso de um sistema de controle fuzzy se deve ao fato de não se ter disponível um modelo dinâmico do processo de adição do fluoreto na cuba eletrolítica. Esta falta de modelagem se deve ao fato de grande complexidade dos fenômenos envolvidos em uma cuba que são processos termodinâmicos e eletromagnéticos acoplados.

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As mudanças no cenário da engenharia civil e consequentemente da gestão da produção das obras exigem um engenheiro com perfil diferente, resultando na necessidade novas competências, relacionadas a inovação, foco no cliente, planejamento e controle, sistemas de gestão da qualidade, sustentabilidade e uma visão humanista. O objetivo principal deste artigo é identificar as competências desenvolvidas em uma empresa construtora com o processo de implantação da Aprendizagem Baseada em Problemas adaptado ao contexto organizacional. A estratégia de pesquisa adotada foi a pesquisa-ação, na qual a equipe de pesquisa atua com profissionais para melhorar a forma como estes entendem e resolvem problemas. Os resultados alcançados envolveram o desenvolvimento de competências relacionadas ao contexto organizacional, à aprendizagem individual, coletiva e organizacional, apontando problemas e possíveis soluções de gestão na empresa. Através do desenvolvimento de competências gerenciais, foi estimulada uma visão humanística, sustentável, com foco no cliente, além de um melhor sistema de gestão da qualidade. Identificaram-se problemas no sistema de gestão organizacional, ficando evidente a necessidade da criação de um ambiente propício para troca de informações entre diferentes setores da empresa.

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This article aims to address the relationship between work and professional education, specifically the ideology skills and the new pedagogy business under the globalization of capital. Is analyzed at first, the world-historical context, the restructuring of the productive and political capital from the 1970s, and the demand for a new organization of work based on model Toyota. Second, discuss such changes are productive within the Brazilian state and its influence on educational policies geared to work, permeated by the ideology skills as an instrument that seeks to obscure the relationshipcapital. It discusses the emergence of new education business connected to the ideals of human capital. It is the influence of international organizations in Brazil of the United Nations (UN) and the United Nations Organization for Education, Science and Culture (UNESCO), aimed at articulating the education according to the ideological aspect global, verified legislative apparatus in education. Ends up not only to reflect the content of the skills ideology, but it is suggested the redemption value of the denied promise of emancipation human-general.

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The information professional as essential component in the soccer‟s club and this article approaches the importance of the information professional insertion inside the soccer‟s club. Know the structure of the clubs, as well like identify the diverse information that are inserted in this context – internal and external environment – of these organizations is necessary for a better comprehension of the activities that the information professional can perform in the clubs. Carrying out a parallel with the organizational structure model proposal by Mintzberg (1995) with the structure of Marília Athletic Club stayed clear the need of the information professional insert, therefore the Club is inserted in a highly competitive environment, there is many information, but little explored.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Alimentos e Nutrição - FCFAR

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A low-cost circuit was developed for stable and efficient maximum power point (MPP) tracking in autonomous photo voltaic-motor systems with variable-frequency drives (VFDs). The circuit is made of two resistors, two capacitors, and two Zener diodes. Its input is the photovoltaic (PV) array voltage and its output feeds the proportional-integral-derivative (PID) controller usually integrated into, the drive. The steady-state frequency-voltage oscillations induced by the circuit were treated in a simplified mathematical model, which was validated by widely characterizing a PV-powered centrifugal pump. General procedures for circuit and controller tuning were recommended based on model equations. The tracking circuit presented here is widely applicable to PV-motor system with VFDs, offering an. efficient open-access technology of unique simplicity. Copyright (C) 2010 John Wiley & Sons, Ltd.

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When a scaled structure (model or replica) is used to predict the response of a full-size compound (prototype), the model geometric dimensions should relate to the corresponding prototype dimensions by a single scaling factor. However, owing to manufacturing technical restrictions, this condition cannot be accomplished for some of the dimensions in real structures. Accordingly, the distorted geometry will not comply with the overall geometric scaling factor, infringing the Pi theorem requirements for complete dynamic similarity. In the present study, a method which takes geometrical distortions into account is introduced, leading to a model similar to the prototype. As a means to infer the performance of this method, three analytical problems of structures subjected to dynamic loads are analysed. It is shown that the replica developed applying this technique is able to accurately predict the full-size structure behaviour even when the studied models have some of their dimensions severely distorted. (C) 2012 Elsevier Ltd. All rights reserved.