Loss Minimization
Mostrando 13-23 de 23 artigos, teses e dissertações.
-
13. Heat losses minimization from hydrogen fueled 4-stroke spark ignition engines
This paper presents an analytical study to minimize the heat lost during the power stroke of hydrogen-fueled, 4-stroke spark ignition engine. The effects of various design and operating parameters like engine speed, equivalence ratio, ignition timing, compression ratio and spark plug location on heat losses was studied. Then, the effect of heat loss on the e
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-03
-
14. New formulations for the reconfiguration problem in energy distribution systems. / Novas formulações para o problema de reconfiguração de redes de distribuição de energia elétrica.
The reconfiguration of electricity distribution systems is concerned with finding the state of switching and protective devices so as to optimize a given objective function, which is usually defined as minimization of total loss, fault isolation, load balancing among feeders, or improvement of voltage profile. In this work, the objective function is defined
Publicado em: 2007
-
15. Redução do teor de cinzas dos finos de carvão vegetal por concentração gravítica a seco
The ashes, or more especifically the impurities, of charcoal are harmful to the production of pig iron, causing higher charcoal consumption, larger slag volume and increased costs. The elimination or minimization of the ashes content is imperative. The reduction of impurities was performed based on the differential properties identified from the technologica
Publicado em: 2007
-
16. ANALYSIS OF THE TRUSTWORTHINESS IN NETS OF DISTRIBUTION RADIAL: RECONFIGURATION AND ALOCATION OF DISTRIBUTED GENERATION / Análise da Cconfiabilidade em Redes de Distribuição Radiais: Reconfiguração e Alocação de Geração Distribuída
The distribution utilities must satisfy two concurrent objectives during planning process of the electric network: minimization of the investment cost and the satisfaction of reliability targets. An alternative to satisfy these objectives is to include low cost alternatives in the planning process. One of these alternatives is the reconfiguration of the dist
Publicado em: 2006
-
17. APLICAÇÃO DO MÉTODO DOS ELEMENTOS FINITOS NA ANÁLISE E PROJETOS DE ESTRUTURAS COAXIAIS / APPLICATION OF FINITE ELEMENTS METHOD IN THE ANALYSIS AND DESIGN OF COAXIAL STRUCTURES
In this work, the Method of Finite Element is applied in the electromagnetic analysis and project of coaxial horns employed as feed in omnidirectional reflector antennas. These feeds are usually excited by standard commercial connectors that require an adaptor to connect to the coaxial horn. This adaptor is usually composed of non-uniform sections of coaxial
Publicado em: 2006
-
18. Redução de perdas na distribuição de energia eletrica pelo metodo GRASP
Energy is continuously dissipated in electric power systems due to electrical resistance in the lines and equipment. Losses amount to around 7% of total energy production, 2% in transmission and 5% in distribution. The problem of loss minimization tries to find a network configuration where the amount of losses is reduced. This work proposes a procedure that
Publicado em: 2000
-
19. Minimização de pedras em redes de distribuição de energia eletrica atraves de metodos de busca inteligentes com processamento paralelo
This thesis addresses the problem of loss minimization for electric energy distribution system. As distribution networks operates radially, the problem can be formulated as a generalization of minimum spanning tree problem. The minimum loss solution is obtained in two steps. The constraint of radial operation is relaxes in the first step, leading to an optim
Publicado em: 1999
-
20. SOLUÇÕES NUMÉRICAS PARA PLOBLEMAS DE OTIMIZAÇÃO DE FORMAS GEOMÉTRICAS ASSOCIADAS À EQUAÇÕES DIFERENCIAIS PARCIAIS ELÍTPTICAS / NUMERICAL SOLUTIONS FOR SHAPE OPTIMIZATION PROBLEMS ASSOCIATED WITH ELLIPTIC PARTIAL DIFFERENTIAL EQUATIONS
This work is directed at the problem of determining numerical solutions for shape optimization problems associated with elliptic partial differential equations. Our primarily motivation is the problem of determining optimal shapes in order to minimize the heat lost of a body, given a fixed volume of insulation and a fixed internal (or external) geometry. The
Publicado em: 1991
-
21. The pAR5 mutation and the allosteric mechanism of Escherichia coli aspartate carbamoyltransferase.
Mutation pAR5 replaces residues 145'-153' at the C terminus of the regulatory (r) chains of Escherichia coli ATCase by a new sequence of six residues. The mutated enzyme has been shown to lack substrate cooperativity and inhibition by CTP. Solution X-ray scattering curves demonstrate that, in the absence of ligands, its structure is intermediate between the
-
22. Conditional Mutations in γ-Tubulin Reveal Its Involvement in Chromosome Segregation and Cytokinesis
γ-Tubulin is a conserved essential protein required for assembly and function of the mitotic spindle in humans and yeast. For example, human γ-tubulin can replace the γ-tubulin gene in Schizosaccharomyces pombe. To understand the structural/functional domains of γ-tubulin, we performed a systematic alanine-scanning mutagenesis of human γ-tubulin (
The American Society for Cell Biology.
-
23. Solution conformation of cytochrome c-551 from Pseudomonas stutzeri ZoBell determined by NMR.
1H NMR spectroscopy and solution structure computations have been used to examine ferrocytochrome c-551 from Pseudomonas stutzeri ZoBell (ATCC 14405). Resonance assignments are proposed for all main-chain and most side-chain protons. Stereospecific assignments were also made for some of the beta-methylene protons and valine methyl protons. Distance constrain