Circuit Optimization
Mostrando 25-36 de 51 artigos, teses e dissertações.
-
25. ELECTRIC DISTRIBUTION POWER SYSTEMS RELIABILITY OPTIMIZATION: An Approach Considering the Selection and Allocation of Protection and Switching Devices / OTIMIZAÇÃO DA CONFIABILIDADE DE SISTEMAS DE DISTRIBUIÇÃO DE ENERGIA ELÉTRICA: Uma Abordagem Considerando a Seleção e Alocação de Dispositivos de Proteção e Manobras
One of the main goals of the electric utilities is to provide energy to its customers in a reliable and low cost way. Traditionally, the electricity sector regulatory commissions impose continuity targets, which must be carried out, to avoid great penalties. For many years, the electric utilities have adopted the practice of allowing the increment of tempora
Publicado em: 2009
-
26. Circuitos integrados de radio-recepção para a operação de multiplexação espacial de antenas em tempo real / Integrated circuits of radio-reception for spatial multiplexing of antennas in real time
This research aims the conception of new topologies of integrated circuits and its characterizations for operation in radio-receiver systems. The design and fabrication of RF switches, LNAs, mixer, and VCOs are presented. The SMILE - Spatial MultIplexing of Local Elements - technique was adopted due to its advantages and functionality for the intelligent ant
Publicado em: 2008
-
27. ALGORITMOS HEURÍSTICOS DE OTIMIZAÇÃO DA PROTEÇÃO E MANOBRA EM REDES DE DISTRIBUIÇÃO DE ENERGIA / RELIABILITY HEURISTIC ALGORITHMS FOR PROTECTION AND MANEUVERING DEVICES DISTRIBUTION NETWORKS
The new regulations of the electricity sector have requested from the power utilities great performance efficiency on their distribution systems, requiring more rigorous quality and continuity energy levels. In Brazil, the privatization of the power utility companies has been allowing the adoption of new planning and operation policies, that necessarily cons
Publicado em: 2008
-
28. Implementation of pacemeker process at printed circuit board manufacturing / Implementação de um processo cadenciador na fabricação de circuitos impressos rigidos
This work has as objective the implementation of a pacemaker process in the line of production of an industry manufacturer of rigid printed circuit board, where the major is on the implantation of a pacemaker process allowing a production flow clean and smoth for one definitive product family of the printed circuit board (not metallized "single face" and met
Publicado em: 2007
-
29. Modeling and optimization of piezoelectric shunts apply to passive vibration control / Modelagem numérica e otimização de shunts piezelétricos aplicados ao controle passivo de vibrações
Due to the development of new technologies, industrial structures are now made of lighter materials and work at higher operation speeds producing an increasing vibration and noise level generation. As a result, different techniques of active and passive control have been developed and are continuously being improved. Among the passive control techniques, the
Publicado em: 2007
-
30. Análise técnica e econômica de um sistema de colheita florestal / Technical and economic analysis of a forest harvest system
Hand logging systems were the first adopted, mostly, in the exploitation of native forests, with no concern with the rationalization and productivity of such activities. In Brazil, the first activities of forest harvesting were carried out along the coast, at that time of discovery, when the main traded species was brazilwood. Machine selection and developme
Publicado em: 2007
-
31. Otimização de carga moedora utilizando ferramentas de modelamento matemático e simulação de moagem
This work aims at the use of grinding mathematical modelling tools and simulation for the assessment of different mill charges and for the optimization of the 5M5A mill at plant 5 Nibrasco CVRD. At first, a complete sampling procedure was performed at the industrial plant, operating with a cylpebs charge, for the material balance adjustment, which data were
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/01/2006
-
32. Multimodal vibration damping through piezoelectric patches and optimal resonant shunt circuits
Piezoelectric elements connected to shunt circuits and bonded to a mechanical structure form a dissipation device that can be designed to add damping to the mechanical system. Due to the piezoelectric effect, part of the vibration energy is transformed into electrical energy that can be conveniently dissipated. Therefore, by using appropriate electrical circ
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-09
-
33. TÉCNICAS PARA A MELHORIA DE DESEMPENHO DA TRANSMISSÃO DE VOZ NO SISTEMA UMTS / TECHNIQUES FOR VOICE TRANSMISSION IMPROVEMENT IN UMTS SYSTEMS
With the advent of multimedia traffic, Third Generation mobile systems were introduced, with the UMTS as the most promissor candidate. In consonance with the global trend of utilization of the IP technology in fixed networks, the UMTS developers decided to incorporate this protocol, which presents more facilities for the introduction of new services. Therefo
Publicado em: 2006
-
34. Preparation and characterization of conducting polymer electrodes on reticulated vitreous carbon (RVC) for application in secondary batteries. / Preparação e caracterização de eletrodos de polímeros condutores sobre carbono vítreo reticulado (RVC) para a aplicação em baterias secundárias.
The general purpose of this work is the optimization of the conducting polymer deposition on RVC and the use of these electrodes in an allpolymeric ion-lithium battery, which means an anode and a cathode made of conducting polymers. Several steps were done in order to attain this purpose: i) a previous study on the effect of different pre-treatments on the R
Publicado em: 2006
-
35. Uma proposta para a integraÃÃo de sistemas de gestÃo
The integration of management system is treated in the literature rather as question of a standard alignment. The integration of management systems, however, should not be limited to alignment only. There is no consensus in the literature concerning what management system integration actually is, as some authors understand integration as being the standard a
Publicado em: 2006
-
36. Avaliação e síntese de corantes fenotiazínicos para determinação espectrofotométrica de sulfeto e sulfito empregando sistemas de análise em fluxo.
In this work seven aromatic amines O e N-substituted were evaluated at optimized reaction conditions for symmetrics phenothiazinic dyes. DMPD, DEPD, PPD, PAP e PAA were the start reagent, where the yield for phenothiazinic dyes varying from 10% to 43% for different oxidizing (Fe3+ or ClO-), acids (H2SO4 or HBF4) and precipitant agent (ClO4 - or BF4 -). The l
Publicado em: 2004