Fractal Theory
Mostrando 1-12 de 27 artigos, teses e dissertações.
-
1. Integrating time series mining and fractals to discover patterns and extreme events in climate and remote sensing databases.
This thesis presents new methods based on fractal theory and data mining techniques to support agricultural monitoring in regional scale, specifically regions with sugar cane fields. This commodity greatly contributes to the Brazilian economy since it is a viable alternative to replace fossil fuels. Since climate influences the national agricultural producti
2010.. Publicado em: 2011
-
2. Computational framework to analyze agrometeorological, climate and remote sensing data: challenges and perspectives.
In the past few years, improvements in the data acquisition technology have decreased the time interval of data gathering. Consequently, institutions have stored huge amounts of data such as climate time series and remote sensing images. Computational models to filter, transform, merge and analyze data from many different areas are complex and challenging. T
CONGRESSO DA SOCIEDADE BRASILEIRA DE COMPUTAÇÃO. Publicado em: 2011
-
3. Análise fractal da vascularização da membrana corioalantóide de embriões de codornas japonesas (Coturnix japonica submetidas a campo eletromagnético de 60 Hz.
The formation of vascular network is governed mainly by two processes, vasculogenesis and angiogenesis. In vasculogenesis, the angioblastic which are the precursors of endothelial cells arising in germ layer (mesoderm) of the yolk sac (outside the embryo body). These angioblastic organize themselves to form blood islands, differing in blood vessels where the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2010
-
4. Indices of movement behaviour: conceptual background, effects of scale and location errors
A fundamental step in the emerging Movement Theory is the description of movement paths, and the identification of its proximate and ultimate drivers. The most common characteristic used to describe and analyze movement paths is its tortuosity, and a variety of tortuosity indices have been proposed in different theoretical or empirical contexts. Here we revi
Zoologia (Curitiba). Publicado em: 2010-10
-
5. The role of nonequilibrium thermo-mechanical statistics in modern technologies and industrial processes: an overview
The nowadays notable development of all the modern technology, fundamental for the progress and well being of world society, imposes a great deal of stress in the realm of basic Physics, more precisely on Thermo-Statistics. We do face situations in electronics and optoelectronics involving physical-chemical systems far-removed-from equilibrium, where ultrafa
Brazilian Journal of Physics. Publicado em: 2010-03
-
6. Geração de meios porosos fractais com uma nova equação do tipo Kozeny-Carman / Generation of fractal porous media with a new equation of the type Kozeny-Carman
The relationship between porosity and permeability attracts the attention of researchers and engineers because of their various applications. Such as in utilization of lters, waterproof materials, natural reservoirs, for example.Throughout the twentieth century, several works proposed in the literature they study the relation porosity-permeability, and much
Publicado em: 2010
-
7. Estimativa de expoentes críticos em Percolação
In Percolation Theory, functions like the probability that a given site belongs to the infinite cluster, average size of clusters, etc. are described through power laws and critical exponents. This dissertation uses a method called Finite Size Scaling to provide a estimative of those exponents. The dissertation is divided in four parts. The first one briefly
Publicado em: 2010
-
8. Stelarc e a Comunicação: a túnica inconsútil das corporeidades
Propondo-se a analisar a produção artística de Stelarc a partir de um olhar semiótico, a presente pesquisa busca elementos que legitimem a interpretação simbólica, portanto fantasiosa, imaginária e utópica, das performances, observando-as como signos do processo evolutivo humano em luta contra a obsolescência. A essa leitura opõe-se Brian Massumi,
Publicado em: 2009
-
9. Processamento de sinais e reconhecimento de padrões de resposta de sensores de gases através da geometria fractal. / Signal processing and pattern recognition of gas sensors response by fractal geometry.
The aim of the present work was to propose methods for signal possessing and pattern, recognition from the signals response of gas sensors using models and techniques from the fractal geometry. The data studied and analyzed were obtained from two kinds of sensors. The first sensor was the tin oxide device, which detection principle is based on the resistivit
Publicado em: 2007
-
10. Estudo de Fractalidade e Evolução Dinâmica de Sistemas Complexos
In this work, the study of some complex systems is done with use of two distinct procedures. In the first part, we have studied the usage of Wavelet transform on analysis and characterization of (multi)fractal time series. We have test the reliability of Wavelet Transform Modulus Maxima method (WTMM) in respect to the multifractal formalism, trough the calcu
Publicado em: 2007
-
11. Fractal conductance fluctuations in electron billiards: a random matrix theory approach
Motivated by recent experiments and theoretical works that contradict the original explanation for fractal conductance fluctuations (FCF) in electron billiards, based on the "mixed" structure of the classical phase space, we propose an alternative approach to investigate FCF using Random Matrix Theory (RMT). By means of a semiclassical estimate for value of
Brazilian Journal of Physics. Publicado em: 2006-06
-
12. Topological dimension and self organizing maps / Dimensão topologica e mapas auto organizaveis de Kohonen
Redes Neurais Artificiais Auto-Organizáveis (RNA-AO), introduzidas por Teuvo Kohonen na década de 60, constituem uma poderosa ferramenta para análise de dados, mais especificamente para análise de agrupamentos, visualização e aproximação de superfícies. Nesta tese definiu-se uma nova forma para determinar a dimensão topológica do espaço de saída
Publicado em: 2006