Discrete Control
Mostrando 13-24 de 362 artigos, teses e dissertações.
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13. Exposure to 50 Hz electromagnetic field changes the efficiency of the scorpion alpha toxin
AbstractBackground Extremely low-frequency (50 Hz) electromagnetic field (ELF-EMF) is produced by electric power transmission lines and electronic devices of everyday use. Some phenomena are proposed as “first effects” of ELF-EMF: the discrete changes in the membrane potential and the increase of the calcium channel activity as well as the intracellular
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 20/10/2015
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14. Daily counting of manufactured units sent for quality control: a bayesian approach
This paper presents the statistical modeling for daily counting statistics of units that arrive for quality inspection at a food company. Different Poisson regression models were considered in order to analyze the data collected, with a Bayesian focus. The main objective was to forecast the daily average count based on co-variables such as days of the week.
Pesqui. Oper.. Publicado em: 16/07/2013
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15. A non-standard optimal control problem arising in an economics application
A recent optimal control problem in the area of economics has mathematical properties that do not fall into the standard optimal control problem formulation. In our problem the state value at the final time the state, y(T) = z, is free and unknown, and additionally the Lagrangian integrand in the functional is a piecewise constant function of the unknown val
Pesqui. Oper.. Publicado em: 2013-04
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16. MODELAGEM E CONTROLE DE UM REATOR ELETRÔNICO PARA LÂMPADAS HPS BASEADO NA CONEXÃO DIFERENCIAL DE CONVERSORES CC / MODELING AND CONTROL OF AN ELECTRONIC BALLAST FOR HPS LAMPS BASED ON DIFFERENTIAL CONNECTION OF DC CONVERTERS
This paper presents the development of an electronic ballast for high intensity discharge lamps, using the differential connection technique applied to Flyback converters. The power factor correction stage was implemented by a Buck-Boost converter operating in discontinuous conduction mode. Subsequently, the integrating converters technique was used to simpl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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17. Efeito do exercício físico durante a gravidez sobre o fluxo sanguíneo feto-placentário e o crescimento fetal : ensaio controlado e aleatorizado / Effect of exercise during pregnancy on the blood flow fetal-placental and fetal growth : randomized controlled trials
Introduction: Fetal growth has always been one of the major concerns regarding the practice of exercise during pregnancy, with discussions on whether the redistribution of fetoplacental blood flow during physical exercise and the bypass of blood from the viscera to the muscles could lead to transitory fetal hypoxia. Objective: To study the. E effect of super
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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18. Indução do promotor GmNAC6 por elicitores de estresses e mapeamento de regiões reguladoras / Induction of the promoter GmNAC6 by elicitors of stress and mapping of regulatory regions
NAC domain-containing proteins are unique to plants and comprise a large gene family of transcriptional factors implicated in diverse aspects of plant development and stress responses. The GmNAC6 was recently identified as a downstream component of the ER (endoplasmic reticulum) stress- and osmotic stress-induced NRP (N-rich proteins)-mediated cell death sig
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2012
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19. Implementation of supervisory control in PLCs using high-level language / Implementação de controle supervisório em CLPs usando linguagem de alto nível
Hoje em dia a competitividade entre as empresas está cada vez maior. Em um sistema de produção, a eficácia, a velocidade e a flexibilidade são importantes, pois significam redução de custos. Os sistemas de automação atuais estão cada vez mais complexos, justificando a necessidade de programas de controle mais eficientes, sem erros e de fácil manut
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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20. A new method for decision making in multi-objective optimization problems
Many engineering sectors are challenged by multi-objective optimization problems. Even if the idea behind these problems is simple and well established, the implementation of any procedure to solve them is not a trivial task. The use of evolutionary algorithms to find candidate solutions is widespread. Usually they supply a discrete picture of the non-domina
Pesqui. Oper.. Publicado em: 21/06/2012
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21. Proposta de um procedimento para a modelagem de sistemas de controle de edifícios inteligentes utilizando a rede de Petri colorida. / A procedure for modelling the control system in intelligent buildings based on colored Petri nets.
Technological advances in recent decades have motivated the development of intelligent buildings, aimed at creating environments more productive for the occupants, economically advantageous for the owners and environmentally correct. New ways of interaction between users and the buildings systems are emerging from these kinds of systems, which are not adequa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2011
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22. Fault-tolerant state estimation of linear Gaussian systems subject to additive faults
Owing to the need for the satisfaction of attributes such as safety, maintainability, and reliability in modern critical engineering devices, the design of automatic feedback control systems has increasingly demanding fault-tolerant methods. In particular, if the system states cannot directly be measured by the available suite of sensors, a fault-tolerant st
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2011
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23. Controle supervisÃrio de sistemas a eventos discretos, usando redes de Petri coloridas / Supervisory control of discrete event systems using coloured Petri nets
Esse trabalho propÃe um novo mÃtodo para sÃntese de supervisores em sistemas a eventos discretos, utilizando redes de Petri coloridas, baseado no contexto da teoria de controle supervisÃrio. Como aspecto principal, tem-se a formalizaÃÃo teÃrica e a prova matemÃtica do mÃtodo para sÃntese desses supervisores, denominado RestriÃÃes de Controle sobr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2011
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24. Metodologia para implementação de controle supervisório modular local em controladores lógicos programáveis / Methodology for implementation of supervisory control local modular in programmable logic control
Currently, manufacturing automation has assumed an increasingly important role within the industry and the problems of automated control systems have become increasingly complex. Thus, the traditional use of empirical methods heavily base on the experience of the programmer can lead to inappropriate or ineffective solutions. In this case, the Supervisory Con
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011