Moving Least Squares
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. A continuous fall of PSA use for prostate cancer screening among Brazilian doctors since 2001. Good or bad notice?
ABSTRACT Purpose: To evaluate the trend of use of Prostate Specific Antigen (PSA) for screening of prostate cancer (PC) among Brazilian doctors, from the beginning of its regular availability in clinical laboratories. Material and Methods: A serial cross-sectional study was performed using data obtained from a large database between 1997 and 2016. The gene
Int. braz j urol.. Publicado em: 27/06/2019
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2. An enriched meshless finite volume method for the modeling of material discontinuity problems in 2D elasticity
Abstract A 2D formulation for incorporating material discontinuities into the meshless finite volume method is proposed. In the proposed formulation, the moving least squares approximation space is enriched by local continuous functions that contain discontinuity in the first derivative at the location of the material interfaces. The formulation utilizes sp
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
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3. Análise linear de cascas com Método de Galerkin Livre de Elementos. / Linear analysis of shells with the Element-free Galerkin Method.
O Método dos Elementos Finitos é a forma mais difundida de análise estrutural numérica, com aplicações nas mais diversas teorias estruturais. Contudo, no estudo das cascas e alguns outros usos, suas deficiências impulsionaram a pesquisa em outros métodos de resolução de Equações Diferenciais Parciais. O presente trabalho utiliza uma dessas altern
Publicado em: 2010
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4. Development of an Acquisition System and Data Analysis for Measurements of Electron Transport Parameters in Gases / Desenvolvimento de sistema de aquisição e tratamento de dados para medidas de parâmetros de transporte de elétrons em gases
This thesis describes a pulsed Townsend experiment whose purpose was to obtain experimentally the transport parameters of electron in gases, particularly nitrogen and isobutane, within a range of reduced electric field between 130 Td and 210 Td. The transport parameters obtained were the average speed of center of mass of the electron cloud, the ionization r
Publicado em: 2010
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5. Superfícies de pontos dinâmicas / Dynamic point set surfaces
The study of the behaviour of fluids is an ancient field in natural sciences. Recently, engineering phenomena that were empirically studied started to be done with computacional aid. The Computational Fluid Dynamics (CFD) is the area of science that studies computational methods for computer simulation of fluid flow, and often is the most practical way, or t
Publicado em: 2009
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6. Least squares and point-based surfaces: new perspectives and Applications / Minimos-quadrados e aproximação de superfície de pontos: novas perspectivas e aplicações
Surface reconstruction from unorganized points has been one of the most promising scientific research areas in Computer Graphics. In addition, it has been used successfully for the definition of fluid interface in numerical simulation of fluid flow. There are several reasons to that fact: for instance, considering Computer Graphics, we have the handling of o
Publicado em: 2008
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7. Synthesization of thermally induced errors in coordinate measuring machines
This work presents the equations for the components of the volumetric error of a Coordinate Measuring Machine (CMM) considering thermal influences. These equations were applied to a moving bridge CMM and combines homogeneous transformations, regression techniques and least squares algorithm. The magnitudes of both the geometric errors and its thermally induc
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-06
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8. RADIOLOCALIZAÇÃO DE TERMINAIS DE COMUNICAÇÕES MÓVEIS / RADIOLOCATION OF MOBILE COMMUNICATIONS TERMINALS
This work addresses the radiolocation problem of a moving terminal in a cellular mobile communications environment. New alternatives are developed for position estimation, assuming that the Time of Arrival (ToA) measurements obtained from radio link are corrupted by additive noise and have positive mean error during random periods of time due to the non-line
Publicado em: 2004
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9. AN ALGORITHM FOR CURVE RECONSTRUCTION FROM SPARSE POINTS / UM ALGORITMO PARA RECONSTRUÇÃO DE CURVAS A PARTIR DE PONTOS ESPARSOS
Curve and surface reconstruction from sparse data has been recognized as an important problem in computer graphics. Non structured data points (i.e., a set of points with no knowledge of connectivity and proximity) together with the existence of noise make this problem quite difficult. In order to solve it, several techniques have been proposed, such as, som
Publicado em: 2003