Simulation E Speed
Mostrando 13-24 de 76 artigos, teses e dissertações.
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13. Redução dos efeitos negativos das suspeitas incorretas no algoritmo de consenso de Chandra e Toueg
Some protocols in distributed systems, such as atomic broadcast and semi-passive replication, are based on the consensus algorithm proposed by Chandra and Toueg. This algorithm is equipped with an unreliable failure detector. In asynchronous distributed systems, this type of detector can make mistakes by erroneously suspecting a process that is still running
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
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14. Controle da velocidade e da direção entre dois veículos agrícolas / Speed and steering control between two agricultural vehicles
One problems of the mechanical harvest of sugar cane is the lack of synchronization between the harvester and field wagon. This problem can causes crop losses as well as reducing operational capacity. The first occurs when the machines are misaligned and part of the sugar cane is thrown out of the wagon. The operational capacity reduce occurring when the mac
Publicado em: 2011
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15. Comportamento elétrico, mecânico e hidráulico de um sistema de bombeamento sob o enfoque da qualidade de energia elétrica e eficiência energética
The objective of this thesis is to present a methodology of comparison of the electric, mechanical and hydraulical performance of a pump system, under the point of view of the energy efficiency, when supplied with signals power quality. The form used for this intention was to the variation of controlled outflow for strangulation of valve or variation of freq
Publicado em: 2010
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16. Projeto de filtros para atenuação de correntes de modo comum e de sobretensões em acionamentos de motores elétricos utilizando inversores PWM
The use of inverters in most of electrical motor drives applications has been accompanie by several undesirable effects, such as overvoltage at the motor terminals, circulation of common mode currents and electromagnetic interference problems. The determining factors for most of these problems come with the high switching speed and frequency of the semicondu
Publicado em: 2010
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17. Ensaios de ondas ultrassônicas e redes neurais artificiais na avaliação da resistência à compressão do concreto
Stripping of formworks in reinforced concrete structures can only be done when concrete is hardened enough to carry the loads without generating unacceptable deformations. These are two important demands from Brazilian Code NBR 14931-2004. To get those conditions the structural design engineer should inform the building engineer the minimum values of compres
Publicado em: 2010
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18. Avaliação das forças, momentos e binding, produzidos por deformação de primeira ordem do fio NiTi .014 superelástico, em braquetes autoligáveis passivos estudo in vitro / Evaluation of force, moment and binding produced by first order deformation on a superelastic .014 Niti wire using passive self-ligated brackets in vitro study
Bracket characteristics and wire stiffness dictate the mechanical effects that nickel titanium wire deformation will cause upon teeth. The main variables associated to bracket characteristics include bracket length (that influence interbracket distance), and coefficient of friction. The purpose of this research was to compare how self ligated brackets such a
Publicado em: 2010
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19. Modelos de simulação para análise e apoio à decisão nos processos de corte mecanizado, carregamento e transporte no agronegócio da cana-de-açúcar / Simulation models for analysis and decision support in the processes of cutting, loading and transport in the agribusiness of cane sugar
In the current days sugarcane occupies an area of approximately 10,5 % of all the Brazilian agricultural land, with an estimated production for the 2008/2009 crop of 528 million t. In the sugarcane production process, the harvest highlights due its high costs, representing approximately 35% of the sugarcane production costs, besides the addition of operation
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2009
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20. Fracture strength of flared bovine roots restored with different intraradicular posts
OBJECTIVE: The aim of this study was to evaluate the fracture strength and failure mode of flared bovine roots restored with different intraradicular posts. MATERIAL AND METHODS: Fifty bovine incisors with similar dimensions were selected and their roots were flared until 1.0 mm of dentin wall remained. Next, the roots were allocated into five groups (n=10):
Journal of Applied Oral Science. Publicado em: 2009-12
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21. On the statistical steady state gas-solid flow in a riser as predicted through a two-fluid simulation
This work is concerned with the extremely high computational costs of the two-fluid simulations of gas-solid flows in risers. In a previous article [1] a procedure was proposed to speed up the simulations towards the desired statistical steady state flow regime. In this continuing article the concern is turned to the time extent that a simulation must advanc
Computational & Applied Mathematics. Publicado em: 2009
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22. Modelos de simulação para análise e apoio à decisão nos processos de corte mecanizado, carregamento e transporte no agronegócio da cana-de-açúcar / Simulation models for analysis and decision support in the processes of cutting, loading and transport in the agribusiness of cane sugar
In the current days sugarcane occupies an area of approximately 10,5 % of all the Brazilian agricultural land, with an estimated production for the 2008/2009 crop of 528 million t. In the sugarcane production process, the harvest highlights due its high costs, representing approximately 35% of the sugarcane production costs, besides the addition of operation
Publicado em: 2009
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23. Microclimas urbanos no Plano Piloto de Brasília : o caso da superquadra 108 sul
This project intends to identify the urban micro-climate that exists on the Superquadra 108 Sul in Plano Piloto of Brasília. It has been studied, experimentally, three different spots with distinct vegetation in order to analyze the effects on the following variables: air temperature, humidity, direction and speed of wind, and superficial temperature of mat
Publicado em: 2009
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24. Um sistema simplicado para tranmissão de dados em rede de energia eletrica : concepção do circuito, prototipo e proposta de integração / A simplified system for power line data communication : circuit design, prototype and integration proposal
It was developed in this work a circuit for power line data communication - PLC that enable low speed data transmission in a circuit topology that enable a future integration. The built prototype was elaborated with discrete components and exhibits a compatible operation with a typical PLC circuit. The coupling circuits with the mains wires are extensively d
Publicado em: 2009