Packing Spheres
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Empacotamento em quadráticas / Packing on quadrics
Neste trabalho, serão propostos modelos matemáticos para problemas de empacotamento não reticulado de esferas em regiões limitadas por quadráticas no plano e no espaço. Uma técnica para construir representações ou parametrizações será introduzida, mediante a qual será possível encontrar um sistema de desigualdades que determinam o empacotamento
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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2. Packing cylinders using trust-region algorithms : a comparative study / Desempenho de algoritmos de região de confiança para problemas de empacotamneto de cilindros
Este trabalho encaminha a investigação de questões relacionadas ao desempenho de algoritmos de região de confiança para problemas de otimização irrestrita de grande porte. O algoritmo clássico de Moré e Sorensen, baseado em fatorações de Cholesky, é comparado com a abordagem de Rojas, Santos e Sorensen (algoritmo RSS). Do ponto de vista teórico
Publicado em: 2007
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3. Eficacia de limpeza durante o beneficiamento de tomate de mesa / Effectiveness of cleaning during post harvest handling fresh market tomatoes
The cleaning step of a packing line for fresh tomatoes is very important, because it is responsible for removing surface residues of fruits without injuring. The main goal of this work was to evaluate cleaning efficiency and fruit quality submitted to different types of bristles and rotations, having as referential model the fresh market tomato Débora. The
Publicado em: 2007
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4. Coordenadas Fricke e empacotamentos hiperbolicos de discos
This work searches elements to determine the packing density of spheres defined by lattices in the hyperbolic plane. We consider the teichmüller space Tg of all closed compacts oriented surfaces of genus 9 ~ 2, which has the hyperbolic plane as universal covering rienmannian surface. It is known that the system of Fricke coordinates in Tg associates each su
Publicado em: 2005
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5. Uma formulação autoconsistente não muffin-tin para o metodo APW, e sua aplicação ao GaAs
The APW method for calculating electronic energy bands in solids is based on the so called muffin-tin " (MT) approximation for the crystal potential. The potential is taken as spherically symmetric within spheres centered at the atomic sites, and constant outside the spheres. "Ad hoc" crystal potentials are obtained by superposing self-consistent atomic pote
Publicado em: 1979
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6. Analogue solution for electrical capacity of membrane-covered cubes in cubic array at high concentration.
Earlier measurements have shown that the equations derived for the resistance of suspension of spheres apply up to a volume concentration of 100% for close-packing forms. They have also shown, by a resistance-capacitance analogue, that they apply for the capacity of a close-packing of membrane-covered square cylinders in square array, approximating muscle an
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7. Configurations of adsorbed hard spheres after diffusion in a gravitational field.
The deposition and adhesion of particles on a solid surface are governed by a great number of interplaying forces. In this paper we analyze, by means of computer simulations, the influence of (i) the short-range repulsive forces, modeled by hard sphere interactions, (ii) the gravitational forces, and (iii) the diffusion process of the particles in the fluid