Forecasting And Simulation
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Ciclo de vida do sistema de monção da América do Sul: observação e simulação / The life cycle of the south American monsoon system: observation and simulation
O ciclo de vida do Sistema de Monção da América do Sul (SMAS) possui um papel importante na duração da estação chuvosa, principalmente sobre o sudoeste da Amazônia e Regiões Centro-Oeste e Sudeste do Brasil, afetando a economia através dos impactos nos setores agrícola e energético. Neste estudo é aplicado um novo critério baseado no comportame
Publicado em: 2008
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14. History matching using statistical design, production data and saturation map / Ajuste de historico utilizando planejamento estatistico e combinação de dados de produção, pressão e mapas de saturação
The main objective of history matching is to improve numerical models of oil fields by incorporating observed data, production and pressure, into the characterization process, in order to obtain more reliable production forecasting. This technique presents some limitations mainly in the beginning of the development of oil fields, when less information is ava
Publicado em: 2007
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15. Inclusion of the momentum perturbation in the kain-fritsch cumulus parameterization scheme and impacts on a convective rain case / Inclusão da perturbação de momentum no esquema de parametrização de cumulus kain-fritsch e impactos sobre um caso de chuva convectiva
The objective of this work is to insert the vertical transport of momentum through the mass flux in the Kain-Fritsch convective parameterization scheme. The momentum fluxes were inserted in the KF scheme in a similar way to the existing heat fluxes. Experiments were accomplished in the two domains, one experiment with cloud updraft (FM1) and one experiment i
Publicado em: 2007
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16. O uso de redes neurais artificiais na previsÃo de tendÃncias no mercado de aÃÃes
Stock markets are considered a high return investment option, dominated by uncertainty and volatility. The forecast of the movement of that market is a difficult task, because is influenced by many economical, political and even psychological factors. The traditional statistical methods and the known analysis (technical and fundamental) are not capable to id
Publicado em: 2006
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17. Valuation of the Kuo Model for the forecasting of the rain and thunderstorm in the South region of Brazil: cases studies / Avaliação do modelo de Kuo para a previsão de chuvas e tempestades na região Sul do Brasil: Estudo de casos
The purpose of this research work was to make the quality verification of the results assumed by BRAMS mesoscale model 3.2 model. According to the forecasting of convective precipitation occurrence and/or thunderstorm formation, utilizing the parametrization of Kuo Type humidity convergence. On this way, these results were compared to the data observed on th
Publicado em: 2006
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18. An operational policy for the mid term hydrothermal scheduling of the Brazilian interconnected power system / Uma politica operativa a usinas individualizadas para o planejamento da operação energetica do sistema interligado nacional
This work presents an operational policy for the mid term hydrothermal scheduling of the Brazilian Interconnected Power System (BIPS) based on the individual representation of the hydro and thermo power plants, the detailed representation of the plants? features and the indirect representation of the inflow stochasticity through a forecasting model. These ch
Publicado em: 2006
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19. Previsão hidrossedimentológica numa bacia periurbana através do acoplamento de modelos climáticos e hidrológicos
The objective of the present study is to develop an integrated system of hydro-meteorological forecasting (rainfall-runoff-erosion) to be applied in information systems to be used by watershed committees. In order to model the rainfall-runoff-erosion forecasting to Pirapama river basin, which is located in the coast of Pernambuco state in northeastern Brazil
Publicado em: 2005
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20. Aspectos sinóticos associados à ocorrência do jato em baixos níveis na América do Sul - reanálise NCEP/NCAR e simulação com o MCGA CPTEC/COLA / Synoptics aspects associated to the occurrence of the low levels jet in the south America - reanalyses of the NCEP/NCAR and simulation with the MCGA CPTEC/COLA
Cases of LLJ occurrence to the east of Andes were identified in NCEP/NCAR reanalyses data and in daily results of a climate simulation with the CPTEC/COLA AGCM, to identify the associated atmospheric patterns. weather forecasting of a case when there was occurrence of LLJ was also evaluated. Analysis performed in different seasons indicated similar synoptic
Publicado em: 2005
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21. ESTUDO PARA O DESENVOLVIMENTO DE UM PREVISOR DE DESCARGAS ELÉTRICAS ATMOSFÉRICAS APLICADO À REGIÃO COSTEIRA DO ESTADO DO RIO DE JANEIRO
The atmospheric dynamics evidently is very complex. There are many macro and micron scales processes and meteorological variables involved in the atmospheric physicalphenomena. The storms with electrical discharges are distinguished, among these phenomena, by the damage consequences to the human beings, directly or indirectly. Many researchers have pursued t
Publicado em: 2005
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22. EFEITOS DA IONOSFERA DE BAIXAS LATITUDES NO GPS - SBAS (GLOBAL POSITIONING SYSTEM - SPACE BASED AUGMENTATION SYSTEM) / EFFECT OF THE IONOSPHERE OF LOW LATITUDES IN GPS - SBAS (GLOBAL SYSTEM POSITIONING - SPACE BASED AUGMENTATION SYSTEM)
The low-latitude ionosphere has some features that could cause problems even to the joint GPS/SBAS operation. Among them, one finds the equatorial anomaly, whose electronic density - and thus its refractive index - can present intense horizontal gradients. These gradients can be intense enough to induce errors in the predictions by the GPS/SBAS. To analyze t
Publicado em: 2004
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23. Neural networks forecasting and classification-based techniques for novelty detection in time series
Novelty detection can be defined as the identification of new or unknown data that a machine learning system is not aware during training. Novelty detection algorithms are designed to classify input patterns as normal or novelty. These algorithms are used in several areas such as computer vision, machine fault detection, network security and fraud detection.
Publicado em: 2004
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24. Sistema de suporte a decisão para o planejamento e a programação da operação de sistemas de energia eletrica
This work presents a computer aided decision support system applied to long and short term hydrothermal power systems scheduling. This program, called HydroLab, is based on a hydropower database system that manages the main set of Brazilian hydro plants (the current version manages a total of 102 plants coordinated by the ONS - National Electric System Opera
Publicado em: 2003