Implicit Curves
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Aproximação isotópica suave de curvas e superfícies implícitas. / Smooth isotopic approximation of implicit curves and surfaces
Esta dissertação contém um estudo a respeito de curvas planas e superfícies. São vistas as duas formas mais usuais de se definirem estes elementos: a definição paramétrica e a implícita, com ênfase nesta última. São analisadas algumas formas de representação de curvas planas e superfícies, o que vem a ser uma tarefa relativamente simples ao se
Publicado em: 2008
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2. Schistosomal granuloma as a system adaptive complex. Application of fractal dimension in characterization of their geometric properties. / Granuloma esquistossomótico como um sistema adaptativo complexo. Aplicação da dimensão fractal na caracterização de suas propriedades geométricas.
Schistosomal granuloma AS A COMPLEX ADAPTIVE SYSTEM: APPLICATION OF FRACTAL DIMENSION IN THE CHARACTERIZATION OF PROPERTIES GEOMETRIC. Waldemiro de Souza Romagna. [Introduction]. The schistosomal granuloma is a compact, organized collection of migrating cells, which along with cells of the affected organ, arrange themselves in the midst of extracellular matr
Publicado em: 2007
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3. Simulação computacional de eventos termo-hidraulicos transitorios em multicircuitos com multibombas
PANTERA-2 (from Programa para Análise Termo-hidráulica de Reatores a ÁguaProgram for Thermal-hydraulic Analysis of Water Reactors, Version 2), whose fundamentals are described in this work, is intended to carry out rod bundle subchannel analysis in conjunction with multiloop simulation. It solves simultaneously the conservation equations of mass, axial an
Publicado em: 2003
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4. OTIMIZAÇÃO DE FORMA DE MODELOS BIDIMENSIONAIS DE ELEMENTOS FINITOS COM COMPORTAMENTO ELASTO-PLÁSTICO / OPTIMIZACIÓN DE FORMA DE MODELOS BIDIMENSIONALES DE ELEMENTOS FINITOS CON COMPORTAMIENTO ELÁSTICO-PLÁSTICO / SHAPE OPTIMIZATION OF 2D FINITE ELEMENT MODELS CONSIDERING ELASTO-PLASTIC BEHAVIOUR
The main goal of this work is to present an integrated system for the optimization of plane structures with elastoplastic behavior. The methodology proposes an alternative for the conservative way in which structures traditionally have been optimized, i.e., that they present linear elastic behavior. The computational system is said to be integrated because i
Publicado em: 2000
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5. Emprego do metodo DFDF na caracterização de guias de ondas dieletricos assimetricos
The finite difference in the frequency domain (FDFD) formulation is used to examine the effect of an asymmetric geometry on the dispersion characteristics of coupled dielectric waveguide structures. The FDFD method is applied to the scalar wave equation in terms of the transverse components of the magnetic field. As a result, an eigenvalue problem is obtaine
Publicado em: 1994
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6. Simulador composicional de reservatorios com formulação implicita em pressão e saturações e semi implicita em composições
This work presents an isothermal, two-dimensional, compositional reservo ir model implicit in pressure and saturations and partially explicit in compositions. Only the flow terms are treated explicitly in the compositional variables. In the single phase cells the primary variable gas saturation is substituted by one compositional variable which is then treat
Publicado em: 1991
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7. Contribuição ao estudo do controle automatico de geração
In this work, the basic concepts of the Automatic Control Generation of a Power System are presented, and the classical modelling methods are discussed. A new modelling approach was developed, where the complete representation of the interconnected system is considered. Alternating solutions of the differential equations of the machines and of the algebraic
Publicado em: 1983
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8. Simulation of the folding equilibrium of α-helical peptides: A comparison of the generalized Born approximation with explicit solvent
We compare simulations using the generalized Born/surface area (GB/SA) implicit solvent model with simulations using explicit solvent (transferable intermolecular potential 3 point, TIP3P) to test the GB/SA algorithm. We use the replica exchange molecular dynamics method to sample the conformational phase space of two α-helical peptides, A21 and the Fs, by
National Academy of Sciences.