Random Graphs
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Diffusive Metrics Induced by Random Affinities on Graphs. An Application to the Transport Systems Related to the COVID-19 Setting for Buenos Aires (AMBA)
ABSTRACT The aim of this paper is to apply the diffusive metric technique defined by the spectral analysis of graph Laplacians to the set of the 41 cities belonging to AMBA, the largest urban concentration in Argentina, based on public transport and neighborhood. It could be expected that the propagation of any epidemic desease would follow the paths determi
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. A HIPERTENSÃO ARTERIAL SISTÊMICA NO MUNICÍPIO DE SANTA MARIA, RS, SOB A ÓTICA DO GEOPROCESSAMENTO / HYPERTENSION IN THE CITY OF SANTA MARIA, RS, FROM THE PERSPECTIVE OF GEOPROCESSAMENTO
Demographic changes and epidemiological made of Chronic Noncommunicable Diseases (NCDs), the leading causes of death in Brazil and worldwide, which has lead to serious public health problems as they affect the quality of life for millions of people, besides the great economic impact on families and society. Among these diseases, there are the Cardiovascular
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2012
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3. Relações da estrutura de redes complexas com as dinâmicas do passeio aleatório, de transporte e de sincronização / Relationships between the structure of complex networks and the random walk, transport and synchronization dynamics
O relacionamento entre estrutura e dinâmica em redes complexas foi considerado utilizando-se uma ampla gama de diferentes técnicas. Diversas redes reais foram estudadas em termos das correlações entre grau e atividade. A medida de atividade é definida como a proporção de visitas por vértice no regime estacionário do passeio aleatório simples. O est
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2011
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4. Aplicação de modelos de Markov ocultos na obtenção de taxas de mortalidade das larvas do mosquito da Dengue
In order to prevent the proliferation of Dengue transmitter - scientifically named as Aedes ae- gypti - and therefore decrease human contamination by such insect, many larvaecides have been developed recently. Researchers from Dom Bosco Catholic University evaluate the efectiveness of vegetal-derived substances capable to combat such animal larvae. Death rat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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5. Algunos aspectos de la climatología solar del Uruguay
The spatial coverage of land measurement networks cannot fulfill all the user's needs because their density is low; and this fact becomes more important in the case of solar radiation. The scarcity of global irradiation data is the reason for using sunshine hours in order to estimate them through different correlations which have shown a good fit with the me
Revista Brasileira de Meteorologia. Publicado em: 2010-12
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6. Limite do fluído para o grafo aleatório de Erdos-Rényi / Fluid limit for the Erdos-Rényi random graph
Neste trabalho, aplicamos o algoritmo Breadth-First Search para encontrar o tamanho de uma componente conectada no grafo aleatório de Erdos-Rényi. Uma cadeia de Markov é obtida deste procedimento. Apresentamos alguns resultados bem conhecidos sobre o comportamento dessa cadeia de Markov. Combinamos alguns destes resultados para obter uma proposição sobr
Publicado em: 2010
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7. Análise,Simulações e Aplicações Algorítmicas de Caminhadas Quânticas / Analysis,Simulations and Algorithmic Applications of Quantum Walks
Quantum computing is a model of computation based on the laws of quantum mechanics, which can be used to develop faster algorithms. The development of efficient quantum algorithms, however, is a highly challenging task. A recent successful approach is the use of quantum walks. In this work, we have studied the quantum walk on the hypercube, obtaining the exa
Publicado em: 2010
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8. Ensaios em finanças quantitativas: apreçamento de derivativos multidimensionais via processos de Lévy, e topologia e propagação do risco sistêmico / Essays in quantitative finance: multidimensional derivative pricing via Lévy processes, and systemic risk topology na risk propagation
Este estudo contempla dois ensaios em finanças quantitativas, relacionados, respectivamente, a modelos de apreçamento e risco sistêmico. No Capitulo 1, e apresentado uma alternativa para modelar opções multidimensionais, cujas estruturas de ganhos e perdas dependam das trajetórias dos processos dos preços dos ativos objetos. A modelagem sugerida consi
Publicado em: 2010
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9. Chemical mixture optimization with flexibility in the execution order of experiments / Otimização de misturas quimicas com flexibilidade na ordem de execução dos experimentos
A split-plot statistical design is proposed for which the main-plots and sub-plots are both chemical mixture designs. Main-plots and sub-plots are investigated using the simplex-centroid design. The composite mixture-mixture design was applied to the simultaneous optimization of extractor solvents and mobile phases used in the chromatographic separation of c
Publicado em: 2007
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10. Complex network and self-organized criticality: models and applications / Rede complexa e criticalidade auto-organizada: modelos e aplicações
Models and scientific theories arise from the necessity of the human being to better understand how the world works. Driven by this purpose new models and techniques have been created. For instance, one of these theories recently developed is the Self-Organized Criticality, which is shortly introduced in the Chapter 2 of this thesis. In the framework of the
Publicado em: 2007
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11. Critical behavior of ising models with random long-range (small-world) interactions
The critical scaling behavior of Ising models with long range interactions is studied. These long-range interactions, when imposed in addition to interactions on a regular lattice, lead to small world graphs. Large-scale Monte Carlo simulations, together with finite-size scaling, is used to obtain the critical behavior of a number of different models. These
Brazilian Journal of Physics. Publicado em: 2006-09
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12. Grafos de mundos pequenos e difusão de inovações
This is a research in the area of Information Technology about how are the innovations disseminated in society. Taking the work of Everett Rogers (1962) about "diffusion of innovations" as reference, the study takes p1ace in the interface of this area with the fields of Sociology and Marketing, allowing evaluating how do the changes or new concepts are recei
Publicado em: 2005