Dynamic Linear Regression
Mostrando 13-24 de 50 artigos, teses e dissertações.
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13. Modelagem nebulosa evolutiva: novas topologias e algoritmos de aprendizagem
This works aims to introduce new evolving fuzzy topologies and learning algorithms. Evolving fuzzy systems are defined as new class of intelligent fuzzy systems, with a high flexibility and autonomy. These systems are able to address problems like nonlinear system identification, control and pattern classification in a dynamic changing environment, adapting
Publicado em: 2011
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14. Determinantes da taxa de juros no Brasil: uma abordagem não-linear
This paper investigates the interest rate determination in Brazil based on autoregressive Markov-Switching Process (MS-VAR). Initially developed to model US business cycle, the MS-VAR approach has been used in several fields in conomics due to its flexibility and to its important empirical results, based on estimates of nonlinear parameters of the regression
Publicado em: 2010
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15. Dinâmica populacional e efeitos de variáveis ambientais sobre a fauna de pequenos mamíferos em um fragmento de floresta com araucária no sul do Brasil
Natural populations of small rodents fluctuate continually over time and the population dynamics of any living organism are shaped by both intrinsic and extrinsic factors. Small mammals populations can show a continuum dynamic activity, ranging from stability to regular cycles of variable amplitude. The species dynamics is also known to be influenced by the
Publicado em: 2010
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16. RESOURCE COLLECTION FOR ANTI-MICROBIAL AT THE UNIVERSITY HOSPITAL OF SANTA MARIA BY MEANS OF FORECASTS / MODELOS DE PREVISÃO DE RECURSOS PARA ANTIMICROBIANOS NO HOSPITAL UNIVERSITÁRIO DE SANTA MARIA
Os escassos recursos da saúde pública impõem ao administrador gerenciar a destinação dos recursos buscando racionalizar e otimizar sua alocação, permitindo, desta forma, melhorar o atendimento aos pacientes, pois o hospital, sendo uma entidade pública, não tem por objetivo o lucro, mas sim promover o bem estar da comunidade. Com isso, a infecção h
Publicado em: 2009
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17. Surface topography assessment techniques based on an in-process monitoring approach of tool wear and cutting force signature
One of the most influential sources in machining affecting surface roughness is the instantaneous state of tool edge. The main objective of the current work is to relate the in-process immeasurable cutting edge deformation and surface roughness to a more reliable easy-to-measure force signals using a robust non-linear time-dependent modeling regression techn
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-09
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18. Reologia de Biodiesel de origens diversas e das misturas Diesel/Biodiesel
Cost and depletion of petroleum derived fuels are increasing, thus alternative fuels are quite required. Biodiesel (B100), which is comprised of fatty acid methyl (or ethyl) esters (FAMEs/FAEEs) derived from vegetable oils, animal fats or waste oils mainly through transesterification, is an alternative source of energy. It is renewable, available locally, bi
Publicado em: 2008
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19. State-space approach in the relationship among soil physical attributes and wheat yield / Abordagem de espaÃo de estados no relacionamento entre atributos fÃsicos do solo e produtividade do trigo
Este trabalho foi realizado com o objetivo de estudar o relacionamento entre os atributos fÃsicos do solo e a influÃncia destes na produtividade de trigo. Para isso, utilizou-se o mÃtodo de estimaÃÃo chamado de Modelo de EspaÃo de Estados ou modelo de regressÃo linear dinÃmico, comparando-o aos modelos de regressÃo simples e mÃltipla da estatÃstic
Publicado em: 2007
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20. Tridimensional modelling of groundwater flow in an unconfined, shallow aquifer in Parque Ecologico Tiete, São Paulo / Modelagem tridimensional de fluxo de águas subterrâneas em um aqüífero livre e raso: aplicação no Parque Ecológico do Tietê - São Paulo
The importance of studying unconfined and shallow aquifers is verified when taking into account that these aquifers are highly vulnerable to contamination and that they are often located under heavily populated regions. A detailed three-dimensional and transient model, which represents the groundwater flow in an area of an unconfined and shallow aquifer at t
Publicado em: 2007
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21. Effectiveness analysis of statics and dynamics hedge strategies for Brazilian arabian coffee market / Análise da efetividade das estratégias estáticas e dinâmicas de hedge para o mercado brasileiro de café arábica
This work was the purpose of analyzing the hedge strategies effectiveness, in terms of risks reduction to the arabian coffee market, with the futures markets use. It was observed, a priori, that arabian coffee is among the most risky products of the Brazilian agribusiness. Moreover, it was detected low use of futures mechanism not only for this product, but
Publicado em: 2007
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22. Econometric analysis of the factor total productivity in Amazonia Legal, 1990-2004 / Análise econométrica da produtividade total dos fatores na Amazônia Legal, 1990-2004
The economic performance of Amazonia Legal and its states is evaluated based on total-factor productivity (TFP) measures obtained by the use of the exogenous growth model formulated by Solow (1956) and by the expanded human capital model proposed by Mankiw et al. (1992). The economic variables taken as proxy of the physical (synthetic quantitative index), hu
Publicado em: 2007
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23. A Análise da Teledensidade como Contribuição ao Entendimento dos Fatores Estratégicos à Sustentabilidade Das Empresas Concessionárias de Telefonia Fixa Brasileiras / The Teledensity Analysis as Contribuition to the Agreement of the Strategic Factors for the Sustentation of the Companies Concessionaries of Fixed Brazilian Telephony.
This dissertation deals with the dynamic environment regarding the Brazilian residential telephone service established since its privatization, in 1997. The territorial division made by players with distinct strategies, all followed by a strict federal law, and the existence of a regulation organ for telecom services (ANATEL) contributed for the continuous e
Publicado em: 2006
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24. Fluxo do CO2 proveniente da respiração do solo em áreas de floresta nativa da Amazônia / CO2 flux from soil respiration in areas of native Amazon forest
Carbon dioxide is an important contributor to the greenhouse effect, and by extension, the global climate system as a whole; it is generated and consumed through the activities of terrestrial and aquatic microorganisms. Tropical forest CO2 fluxes at the soil-atmosphere interface depend on changes in the physical, chemical and biological characteristics of th
Publicado em: 2006