Systems Of Equations
Mostrando 1-12 de 475 artigos, teses e dissertações.
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1. Correlations of rock mass classifications applied to ferruginous caves
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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2. And people already ask with malice: Where is ...
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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3. Two-dimensional beams in rectangular coordinates using the radial point interpolation method
Abstract The three-dimensional Theory of Elasticity equations lead to a complex solution for most problems in engineering. Therefore, the solutions are typically developed for reduced systems, usually symmetrical or two-dimensional. In this context, computational resources allow the reduction of these simplifications. The most recognized methods of algebraic
REM, Int. Eng. J.. Publicado em: 2020-03
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4. Modified Ring Power Divider Using Stepped-Impedance Resonator
Abstract In this paper, the design of a modified ring power divider dedicated for wideband communication or measurement systems is presented. The proposed power divider is built by using a conventional ring power divider and an additional Stepped-Impedance Resonator (SIR). The even-odd mode analysis is used to derive the design equations. In order to observe
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-03
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5. Materials Selection Using a 2-tuple Linguistic Multi-criteria Method
The materials selection can affect the design component radically, with effect on the manufacturing systems efficiency, environmental impact issues, and customer satisfaction. There are different methods employed for materials selection; however, two steps are usual for most of these methods: screening and ranking. The ranking step identifies among materials
Mat. Res.. Publicado em: 20/01/2020
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6. Dimensionalidade fractal e invariância de escala em circuitos elétricos AC e linhas de transmissão
Resumo A geometria fractal fascina pela capacidade de descrever formas geométricas complexas e que usualmente estão presentes no mundo real . A dimensão fractal ou de Hausdorff d é utilizada para descrever leis de invariância de escala, em que as funções autossimilares seguem uma lei da forma f ( s x ) = s d f ( x ), sendo s o fator de escala. Intim
Rev. Bras. Ensino Fís.. Publicado em: 10/01/2020
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7. Computational algorithm for stability analysis of distribution networks with distributed generation
Abstract With the insertion of distributed generation in distribution networks, security analysis becomes crucial, in islanded operation or when the system is connected to the grid. Dynamic stability analyses are necessary in order to achieve minimum levels of security and reliability. Such analyses are obtained through the solution of the algebraic-differen
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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8. Photovoltaic Cell Temperature Estimation for a Grid-Connect Photovoltaic Systems in Curitiba
Abstract The photovoltaic solar energy has been growing in installed capacity worldwide year by year, and Brazil has also been investing in this renewable source of energy generation. The conversion of light into electrical energy occurs in the photovoltaic cells, which are sensitive to the increase of the temperature. A considerable amount of the energy in
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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9. Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options
ABSTRACT Traditional livestock productivity is hard to estimate, since it depends on a gamut of animal production indicators that are difficult to measure for many farms. Thus, we propose an analytical method for estimating productivity and understanding the importance of animal production indicators under different full-cycle cattle production systems in Br
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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10. RELIABILITY-BASED MULTI-OBJECTIVE OPTIMIZATION APPLIED TO CHEMICAL ENGINEERING DESIGN
ABSTRACT Chemical engineering optimization represents a significant challenge due to the complexity of the mathematical models that are frequently required in this area. These models are normally associated with nonlinear equations that represent mass, energy, and momentum balances, which are submitted to physical, constitutive, environmental, and design lim
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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11. Optimization of the Size of Thread Pool in Runtime Systems to Enterprise Application Integration: A Mathematical Modelling Approach
RESUMO As empresas buscam alternativas tecnológicas que proporcionem competitividade para seus processos de negócios. Uma delas é a integração de plataformas, ferramentas de software que constroem soluções de integração, que permitem que os diferentes aplicativos que compõem o ecossistema de software trabalhem de forma síncrona e que novas aplica�
TEMA (São Carlos). Publicado em: 03/06/2019
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12. Cenizas de cascarilla de arroz para la activación alcalina de cementantes binarios (ceniza volante/escoria de alto horno)
ABSTRACT Alkali activated mortars made of class F fly ash and blast furnace slag were cast, in order to study the effect of an alternative source of silica on its properties of fluidity and compressive strength. Rice husk ash and sodium silicate solution, mixed with sodium hydroxide, were used for activation of mortars. The mineralogical and structural infor
Matéria (Rio J.). Publicado em: 20/05/2019