Multiscale Methods
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Genetic divergence among cupuaçu accessions by multiscale bootstrap resampling
This study aimed at investigating the genetic divergence of eighteen accessions of cupuaçu trees based on fruit morphometric traits and comparing usual methods of cluster analysis with the proposed multiscale bootstrap resampling methodology. The data were obtained from an experiment conducted in Tomé-Açu city (PA, Brazil), arranged in a completely random
Bragantia. Publicado em: 29/04/2015
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2. Web-based neuromuscular simulator applied to the teaching of principles of neuroscience
INTRODUCTION: The learning of core concepts in neuroscience can be reinforced by a hands-on approach, either experimental or computer-based. In this work, we present a web-based multi-scale neuromuscular simulator that is being used as a teaching aid in a campus-wide course on the Principles of Neuroscience. METHODS: The simulator has several built-in indivi
Rev. Bras. Eng. Bioméd.. Publicado em: 2013-09
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3. Recuperação de imagens por conteúdo baseada em realimentação de relevância e classificador por floresta de caminhos ótimos / Content-based image retrieval based on relevance feedback and optimum-path forest classifier
Considering the increasing amount of image collections that result from popularization of the digital cameras and the Internet, efficient search methods are becoming increasingly necessary. In this context, this doctoral dissertation proposes new methods for content-based image retrieval based on relevance feedback and on the OPF (optimum-path forest) classi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2011
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4. Inclusão de MRI e informação multigrid a priori para inferência bayesiana de fontes de M/EEG / MRI image and multigrid a priori information for bayesian M/EEG source localization
Functional Neuroimaging has evolved in the last few decades with the introduction of techniques such as Positron Emission Tomography or PET and Functional Magnetic Ressonance Image or fMRI [Belliveau et al., 1991]. These allow observing brain activity with a resolution of a few millimeters and, due to the nature of the signal, a time resolution of the order
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/04/2011
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5. Computer aided polymer design using multi-scale modelling
The ability to predict the key physical and chemical properties of polymeric materials from their repeat-unit structure and chain-length architecture prior to synthesis is of great value for the design of polymer-based chemical products, with new functionalities and improved performance. Computer aided molecular design (CAMD) methods can expedite the design
Brazilian Journal of Chemical Engineering. Publicado em: 2010-09
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6. Recuperação de imagens multiescala intervalar / Image retrieval by interval multiscale
We present a general method for content-based image retrieval (CBIR) in large image collections, using multiscale interval distance estimation. We consider specifically queries by example, where the goal is to find the image in the collection that is closest to a given image, according to some image distance function. In this work we do not aim to develop me
Publicado em: 2010
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7. Locally Perturbative Multiscale Methods for Ionic Solute Transport in Clayly Soils / Modelos Multi-escala Localmente Perturbativos para o Transporte de Solutos Iônicos em Meios Porosos Argilosos
Este trabalho objetiva o desenvolvimento de modelos computacionais capazes de construir simulações numéricas mais realistas e menos custosas computacionalmente para o problema de descontaminação de solos argilosos por técnicas de eletrocinética. Resultados inovadores são obtidos aprimorando-se os modelos multi-escala desenvolvidos anteriormente por L
Publicado em: 2010
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8. Central schemes for porous media flows
We are concerned with central differencing schemes for solving scalar hyperbolic conservation laws arising in the simulation of multiphase flows in heterogeneous porous media. We compare the Kurganov-Tadmor (KT) [3] semi-discrete central scheme with the Nessyahu-Tadmor (NT) [27] central scheme. The KT scheme uses more precise information about the local spee
Computational & Applied Mathematics. Publicado em: 2009
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9. Estimation of loss probability and an admisssion control scheme for multifractal network traffic / Estimação da probabilidade de perda e um esquema de controle de admissão para trafego multifractal de redes
The present work proposes an analytical expression for estimating the byte loss probability at a single server queue with multifractal traffic arrivals. Initially we address the theory concerning multifractal processes, especially the Holder exponents of the multifractal traffic traces. Next, we focus our attention on the second order statistics for multifra
Publicado em: 2009
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10. Detecção de mudanças e recuperação de forma em mapas 3D basedos em nuvens de pontos
This work proposes a framework to efficiently detect and segment changes in 3D point clouds. Initially, we simplify the point cloud which generates a tree representation in order to preserve the relevant characteristics using surface variation as the key constraint. Then, a combined approach using Gaussian Mixture Models (GMM) and the Earth Mover s Distance
Publicado em: 2009
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11. 3D image registration of the human brain / Registro de imagens 3D do cerebro humano
Image Registration is the process that aligns two or more images in a common reference system of spacial coordinates [31]. It is an important problem with several applications in Medical Imaging, enabling, for instance, the analysis of changes in anatomy along time by the registration of images from the same modality, and the study of combined anatomic and p
Publicado em: 2009
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12. Desenvolvimento de metodos para simulação multiescala de materiais / Development of methods for the multiscale simulation of materials
A presente dissertação tem como proposta iniciar o desenvolvimento de um sistema de softwares para a simulação multiescala de materiais, com foco na nanociência. Para esta finalidade um sistema de dinâmica molecular foi construído partindo-se do zero. A partir deste sistema, diversas aplicações foram feitas em problemas envolvendo o estudo de propri
Publicado em: 2007