Real Time Forecasting
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Data assimilation using the ensemble Kalman filter in a distributed hydrological model on the Tocantins River, Brasil
RESUMO Neste trabalho, o método de assimilação de dados por filtro de Kalman por conjunto (EnKF) é aplicado na bacia do rio Tocantins. Esse método atualiza as vazões do rio usando um modelo hidrológico distribuído. O desempenho de EnKF é também comparado com um método de assimilação empírico a intervalos de tempo horário, onde duas aplicaçõ
RBRH. Publicado em: 04/04/2019
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2. A glimpse of the future in animal nutrition science. 2. Current and future solutions
ABSTRACT Despite tremendous advancements in the livestock sector, additional opportunities exist to improve even further livestock production around the globe. Forecasting is not an exact science and it relies heavily on past and current knowledge. Improvements in the nutritional sciences (both human and animal) include a better understanding of agents that
R. Bras. Zootec.. Publicado em: 2017-05
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3. Time-series forecasting of pollutant concentration levels using particle swarm optimization and artificial neural networks
This study evaluates the application of an intelligent hybrid system for time-series forecasting of atmospheric pollutant concentration levels. The proposed method consists of an artificial neural network combined with a particle swarm optimization algorithm. The method not only searches relevant time lags for the correct characterization of the time series,
Quím. Nova. Publicado em: 2013
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4. Dynamic load-balancing : a new strategy for weather forecast models
Weather forecasting models are computationally intensive applications and traditionally they are executed in parallel machines. However, some issues prevent these models from fully exploiting the available computing power. One of such issues is load imbalance, i.e., the uneven distribution of load across the processors of the parallel machine. Since weather
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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5. Previsão de demanda para sistema de abastecimento de água / Water demand prediction for water distribution system
The present work focuses the problem of water demand forecasting for real time operation of WSS. The study was conducted using hourly consumption data from water distribution system from the cities of São Carlos, Araraquara, SP, to identify the model that fits better. It were studied the artificial neural network Multilayer Perceptron (ANN MLP), the Dynamic
Publicado em: 2010
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6. Ensaios sobre previsão de inflação e análise de dados em tempo real no Brasil
Esta tese apresenta três ensaios sobre previsão de inflação e análise de dados em tempo real no Brasil. Utilizando uma curva de Phillips, o primeiro ensaio propõe um “modelo evolucionário” para prever inflação no Brasil. O modelo evolucionário consiste em uma combinação de um modelo não-linear (que é formado pela combinação de três redes
Publicado em: 2010
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7. Modelos de séries temporais com coeficientes variando no tempo
In this work they are presented extensions of Auto Regressive and Auto Regressive Conditional Heteroscedasticity models with coefficients varying in time. These coefficients have been used as models for non stationary real time series, specially for financial series. The objective of this work is to present the models and the techniques involved in estimatin
Publicado em: 2009
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8. Sistema de suporte a decisão para analise e previsão de carga por barramento / Decision support system to the analysis and bus load forecasting
In a power operation system there are many variables that can Influence the execution of t ho control routines. The attendance of these variables is very important to aid the processes in the safe operation of the system. In the electric system the bus load level is an important variable in operation planning step. Accurate Information on the load level In e
Publicado em: 2009
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9. Uma arquitetura de Gateway com QoS para gerenciamento de tráfego de rede considerando restrições temporais das aplicações
Applications with time restrictions are becoming common in our daily lives. These applications range from games to applications for controlling air traffic. Applications with time restrictions that use the Internet / Intranet as a mean of communication (e.g. streaming audio and video, VoIP and messaging PRC-RT), require that their packets be delivered before
Publicado em: 2009
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10. Real-time optimization of water supply system operation / Otimização energética em tempo real da operação de sistemas de abastecimento de água
This work presents a computational model for real-time optimization of water-distribution networks operation. An integrated software tool has been developed which is composed of three main modules: (i) a hydraulic simulator that performs the extended period simulation of the system (EPANET); (ii) a short-term demand-forecasting model, based on the moving Fou
Publicado em: 2009
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11. ESTIMATION OF PETROLEUM FUTURE CONTRACTS USING THE KALMAN FILTER METHOD / ESTIMATIVA DE PREÇOS DE CONTRATOS FUTUROS SOBRE PETRÓLEO UTILIZANDO O MÉTODO DO FILTRO DE KALMAN
The Future Market is becoming increasingly important in the global scenario of Corporate Finance. The main interest in this segment of finance is the need of being protected against the volatility of financial markets. Accordingly, one of the most traded commodity is oil. Because of difficulty in determine the value of future contracts on oil barrel, many mo
Publicado em: 2009
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12. Teoria da perturbaÃÃo em sistemas hÃbridos inteligentes para a previsÃo de sÃries temporais
De forma geral, as abordagens descritas na literatura utilizam apenas a prÃpria sÃrie para realizar a previsÃo, descartando a sÃrie de resÃduos proveniente da diferenÃa entre os dados reais da sÃrie e a previsÃo do modelo. Os mÃtodos tradicionais de inteligÃncia artificial nÃo tratam a sÃrie de resÃduos, considerando assim que essa sÃrie tenha
Publicado em: 2008