FGV EMAp - Escola de Matemática Aplicada: Recent submissions
Now showing items 41-60 of 148
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Mining jams into pollution: how Waze data helps estimating air pollution in large cities
2019-06Air pollution has been a growing worry of international medical organizations and governments due its relation with a large number of respiratory diseases, among other effects. This work proposes an open, crowdsourced, ... -
Representação de documentos multimídia: dos metadados às anotações semânticas
2014O artigo apresenta o resultado do estudo do estado da arte de iniciativas internacionais e nacionais que estão explorando o uso de ontologias e padrões de metadados para agregar conhecimento em anotações a fim de realizar ... -
Extraction of keywords from texts: an exploratory study using noun phrases
2014The increasing use of Web for both scholarly publishing and information retrieval emphasizes the need for mechanisms to support efficient indexing and effective information retrieval. Manual indexing and knowledge ... -
Specifying ubiquitous systems through the algebra of contextualized ontologies
2014In this paper we present the algebra of contextualized ontologies and an approach to specify context-aware systems. The algebra is designed to support context moddeling and aims at the specification of modular and scalable ... -
Infimum gaps for limit solutions
2015After recalling the notion of L1 limit solution for a dynamics which is affine in the (unbounded) derivative of the control, we focus on the possible occurrence of the Lavrentiev phenomenon for a related optimal control ... -
Usabilidade da Biblioteca Virtual em Saúde: avaliando a eficácia, eficiência e satisfação
2015Aborda aspectos relativos à avaliação de bibliotecas digitais, consideradas como dispositivos informacionais que podem auxiliar na democratização da informação mediada pelas tecnologias digitais. Tais bibliotecas podem ser ... -
As wordnets do português
2015-04Not many years ago it was usual to comment on the lack of an open lexicalsemantic knowledge base, following the lines of Princeton WordNet, but for Portuguese. Today, the landscape has changed significantly, and researchers ... -
A note on systems with ordinary and impulsive controls
2016We investigate an everywhere defined notion of solution for control systems whose dynamics depend non-linearly on the control u and state x, and are affine in the time derivative u˙. For this reason, the input u, which is ... -
State of the art on functional fabrication
2016Digital fabrication technologies are becoming of importance to a number of knowledge areas and sectors, including medicine, entertainment, design, engineering, education, arts and architecture, due to their accessibility ... -
Full Bayesian analysis of claims reserving uncertainty
2017-01-05We revisit the gamma–gamma Bayesian chain-ladder (BCL) model for claims reserving in non-life insurance. This claims reserving model is usually used in an empirical Bayesian way using plug-in estimates for the variance ... -
Interatividade e usabilidade nas bibliotecas digitais no processo ensino-aprendizagem
2012Este estudo de revisão de literatura sobre interatividade e usabilidade nas bibliotecas digitais objetiva apresentá-las como ferramentas que podem auxiliar na construção do conhecimento numa concepção de educação mediada ... -
Convergence rate of strong local linearization schemes for stochastic differential equations with additive noise
2011-09-23There is a variety of strong Local Linearization (LL) schemes for the numerical integration of stochastic differential equations with additive noise, which differ with respect to the algorithm that is used in the numerical ... -
Optimal exercise strategies for operational risk insurance via multiple stopping times
2016-04-12In this paper we demonstrate how to develop analytic closed form solutions to optimal multiple stopping time problems arising in the setting in which the value function acts on a compound process that is modified by the ... -
A cooperative conjugate gradient method for linear systems permitting efficient multi-thread implementation
2018This paper revisits, in a multi-thread context, the so-called multi-parameter or block conjugate gradient (B-CG)methods, first proposed as sequential algorithms by O’Leary and Brezinski, for the solution of the linear ... -
Establishing traveling wave in bistable reaction-diffusion system by feedback
2018-11-08Several stains of the intracellular parasitic bacterium Wolbachia limit severely the competence of the mosquitoes Aedes aegypti as a vector of dengue fever and possibly other arboviroses. For this reason, the release of ... -
Seleção online de portfólio de criptoativos por meio de aprendizado por reforço
2019-05-06Este trabalho se propôs a ampliar o entendimento do framework de Reinforcement Learning concebido por Jiang et al. (2017) para o problema de seleção online de portfólio. Ao substituir o Bitcoin do trabalho original por um ... -
DeepQ learning in Atari Games
2018-11The aim of this paper is to develop an AI agent with self-learning capabilities that is able to play classical Atari console games without human intervention and achieve next to human level performance. In order to achieve ... -
Previsão de resultados de tênis
2018-11Começamos este trabalho com uma pesquisa exploratória dos modelos atualmente usados na previsão de resultados no esporte, levando a uma comparação de suas acurácias na base de dados histórica de partidas. Determinado o ... -
Simulações em teoria de resposta ao item e testes adaptativos computadorizados
2018-11Estimar a pro ficiência de um aluno baseado em uma prova não é um problema simples. O Exame Nacional do Ensino Médio (ENEM), por exemplo, utiliza a Teoria de Resposta ao Item (TRI) para estimar os níveis de habilidade dos ...
