Mixed Integer Optimization
Mostrando 13-24 de 40 artigos, teses e dissertações.
-
13. Um estudo computacional da busca tabu paramétrica para programação inteira mista 0-1 / A computational study of parametric tabu search for 0-1 mixed integer programs
Este trabalho apresenta um estudo computacional da busca tabu paramétrica para resolver problemas de programação inteira mista (PIM) com variáveis binárias. Trata-se de uma heurística genérica para problemas PIM gerais que resolve uma série de problemas de programação linear ao incorporar inequações de ramificação de variáveis inteiras como te
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2010
-
14. GLOBAL OPTIMIZATION OF THE LOCATION, TOPOLOGY AND CAPACITY OF A TRANSMISSION NETWORK: A MIXED-INTEGER NON-LINEAR PROGRAMMING APPROACH / OTIMIZAÇÃO GLOBAL DA LOCALIZAÇÃO, TOPOLOGIA E CAPACIDADE DE UMA REDE DE TRANSMISSÃO: UMA ABORDAGEM DE PROGRAMAÇÃO NÃO-LINEAR INTEIRA MISTA
O Brasil é um dos líderes mundiais no uso de energia renovável. Além da fonte principal hidroelétrica, que historicamente tem dominado a produção de energia no país, duas fontes renováveis tornaram-se competitivas para a expansão de grande porte nos últimos cinco anos: a bioeletricidade (BE), proveniente da cogeração a partir do bagaço de cana
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/04/2010
-
15. Optimization of water removal in the press section of a paper machine
An optimization problem regarding water removal in the press section of a paper machine is considered in this work. The proposed model tries to minimize a cost function comprising the replacement of the felts in the press section, the cost of energy to operate the press and the cost of energy in the drying section, while satisfying the constraints of water m
Brazilian Journal of Chemical Engineering. Publicado em: 2010-06
-
16. Comparative analysis of voltage regulation strategies in power distribution systems with distributed generators / Análise comparativa de estratégias para regulação de tensão em sistemas de distribuição de energia elétrica na presença de geradores distribuídos
In order to assure that the installation of distributed generation would improve the operation of distribution and subtransmission networks, its technical impacts should be carefully studied, especially in distribution networks, which were originally designed to operate with unidirectional power flow. Among these impacts, the influence of distributed generat
Publicado em: 2010
-
17. Modelagem do planejamento agregado da produção em usinas cooperadas do setor sucroenergético utilizando programação matemática e otimização robusta
The main concern of this work is related to the development of an aggregate production planning model of a cooperative society of sugar and alcohol milling companies. This mathematical model is based on a hierarquical approach between the annual planning problem of the cooperative and the tactical planning horizon of the sugarcane mills. In the cooperative l
Publicado em: 2009
-
18. Uma abordagem para minimização de consumo de energia em redes de sensores sem fio com sorvedouros móveis
In this work, we introduce a new network topology model and algorithms to minimize the energy consumption in Wireless Sensor Networks (WSNs) with mobile sinks. On the one hand, the proposed optimization problem explicitly minimizes the energy consumption rates due to message forwarding. On the other hand, it also attempts to keep message delay rates at low l
Publicado em: 2009
-
19. A study about the portfolio selection problem / Um estudo do problema de escolha de portfólio ótimo
The process of selecting a portfolio is a classical problem in finance, where the investor intends to invest money in the stock market in such way that a reasonable trade-off between expected return and risk is obtained. In general, the higher the expected return of the portfolio is, the higher his risk will be. In this work the single period portfolio optim
Publicado em: 2009
-
20. Corporate governance and portfolios optimization: the relation between risk and return and good governance practices / Governança corporativa e otimização de portfolios: a relação entre risco e retorno e boas práticas de governança
The objective of this work is to verify if shares of companies that adopt good corporate governance practice provides greater returns and lower risks to investors when compared with shares of companies that do not adopt these set of practices. Three optimization portfolios models were used to accomplish this objective. The first model, the maxmin model, maxi
Publicado em: 2007
-
21. Otimização de formulações de fluidos para freios do tipo ABNT 3 (DOT3). / Optimization of brake fluids formulations type ABNT 3 (DOT 3).
The aim of this work is to obtain optimal formulations of brake fluids ABNT 3 type while satisfying technical and market specifications, by utilizing modelling and optimization techniques of five physical and chemical properties. A methodology for the design of commercial products, based on the usage of the information available in databases where previous t
Publicado em: 2007
-
22. Otimização da programação de curto prazo de duto bidirecional de derivados de petróleo. / Short-term scheduling optimization of derivative petroleum bidirectional pipeline.
Pipeline systems play a major role in the supply chain of the petroleum industry. These systems are responsible for the transportation of most of the crude oil and petroleum derivatives. Pipeline systems transfer large amounts of different petroleum types and their products at a lower cost than any other transportation mode. Pipelines interconnect oil fields
Publicado em: 2007
-
23. Phisical distribution networks optimization considering fiscal benefits based on presumed credit of ICMS. / Otimização de redes de distribuição física considerando incentivo fiscal baseado no crédito presumido de ICMS.
This research evaluates the influence of some specific fiscal benefits related to current states sale taxes for internal and interstate operations over distribution center location decisions. The objective is to develop a mathematic model that determines a distribution network with lower cost considering fiscal benefits based on presumed credit, which is cal
Publicado em: 2007
-
24. Optimization of pipeline scheduling operations: efficient formulations and hydraulic considerations. / Otimização da programação de operações dutoviárias: formulações eficientes e considerações hidraúlicas.
Pipeline systems correspond nowadays to the most efficient mode for the transportation of large amounts of liquid and vapor products for long distances. Pipelines are utilized by the Petroleum Industry to transport petroleum and its product derivatives. The present work addresses the scheduling of pipeline distribution of a system that operates with a pipeli
Publicado em: 2007