Planning Under Uncertainty
Mostrando 1-12 de 17 artigos, teses e dissertações.
-
1. NPV analysis of multiple surface constraints for pit expansion scenarios under geological uncertainty
Abstract To optimize a mining project, it is necessary to deal with several technical aspects and constraints, such as orebody modelling, reserve estimation, blending strategy, optimal and operational pit designs, cost control, environmental issues, among others. In this sense, locating surface infrastructures is one of the most critical mine planning concer
REM, Int. Eng. J.. Publicado em: 2019-06
-
2. Direct block scheduling under marketing uncertainties
Abstract Mineral projects are composed of geological, operational and market uncertainties, and reducing these uncertainties is one of the objectives of engineering. Most surveys assess the impact of geological and operational uncertainties on the mining planning. The objective of this work is to study the impact of market uncertainty on the mineral activity
REM, Int. Eng. J.. Publicado em: 2018-04
-
3. Classical and stochastic mine planning techniques, state of the art and trends
Abstract Determination of the best possible ultimate pit for an open pit mine is a fundamental subject that has undergone a highly evolutionary process, reviewed in this study, since the correct choice carries substantial economic impact for the industry. The correct choice can be very beneficial for project analysis, whereas an incorrect choice has the pote
REM, Int. Eng. J.. Publicado em: 2018-04
-
4. Accuracy of dose planning for prostate radiotherapy in the presence of metallic implants evaluated by electron spin resonance dosimetry
Radiotherapy is one of the main approaches to cure prostate cancer, and its success depends on the accuracy of dose planning. A complicating factor is the presence of a metallic prosthesis in the femur and pelvis, which is becoming more common in elderly populations. The goal of this work was to perform dose measurements to check the accuracy of radiotherapy
Braz J Med Biol Res. Publicado em: 26/05/2015
-
5. Stochastic Benders decomposition for the supply chain investment planning problem under demand uncertainty
This paper presents the application of a stochastic Benders decomposition algorithm for the problem of supply chain investment planning under uncertainty applied to the petroleum byproducts supply chain. The uncertainty considered is related with the unknown demand levels for oil products. For this purpose, a model was developed based on two-stage stochastic
Pesqui. Oper.. Publicado em: 04/12/2012
-
6. Long-term planning of a container terminal under demand uncertainty and economies of scale
Governments of many developing countries are presently granting concessions to private organizations to operate container terminals. A key element in this process is the technical and economic evaluation of the project. In practice, the demand levels over time are volatile. The first part of the paper deals with a capacity expansion problem with stochastic d
Pesquisa Operacional. Publicado em: 03/04/2012
-
7. Establishment of Satellite Formation with Initial Uncertainty by Control Lyapunov Function Approach
Abstract In recent years, dynamics and control of satellite formation flying have been active areas of research. From the mission planning perspective, three main areas namely formation establishment, maintenance and reconfiguration have been discussed. In this paper, a study of formation establishment under initial uncertainty is presented. In this regard,
J. Aerosp. Technol. Manag.. Publicado em: 2012-03
-
8. STRATEGIC INVESTMENTS PLANNING AND EXECUTION UNDER UNCERTAINTY: REAL OPTION THEORY CONTRIBUTIONS / PLANEJAMENTO E EXECUÇÃO DE INVESTIMENTOS ESTRATÉGICOS SOB INCERTEZA: CONTRIBUIÇÕES DA TEORIA DE OPÇÕES REAIS
Este trabalho se propõe a orientar como utilizar de forma conjunta e complementar os conceitos de Estratégia Empresarial e Finanças, mais especificamente da Teoria de Opções Reais, uma moderna teoria de análise de investimentos sob incerteza. Nas empresas vem coexistindo dois sistemas para a alocação de recursos: o planejamento estratégico e a orça
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2011
-
9. Decisão de investimento de capital em empresas algodoeiras / Decision of capital investment in cotton companies
This thesis investigates capital equipment analysis and investment projects in cotton gins, raw cotton and oil seed processing units. The Brazilian cotton industry passed through a crisis in competitiveness during the 1980s and 1990s, however, more recently, it has regained international reputation with a high quality product reaching high export levels as w
Publicado em: 2009
-
10. MODELO DE PROGRAMAÇÃO ESTOCÁSTICA PARA O PLANEJAMENTO ESTRATÉGICO DA CADEIA INTEGRADA DE PETRÓLEO / A STOCHASTIC PROGRAMMING MODEL FOR THE STRATEGIC PLANNING OF THE OIL SUPPLY CHAIN
The oil industry is one of the most important and dynamic in Brazil. As the oil industry naturally integrated, we need an appropriate strategic planning to the oil supply chain that consider all its processes, such as oil production, refining, distribution and refined products marketing. Moreover, the oil industry is susceptible to various uncertainties rega
Publicado em: 2008
-
11. Perfil dos atributos do sistema orçamentário sob a perspectiva contingencial: uma abordagem multivariada / Profile of attributes of the system budget from the perspective contingencial: a multivariate approach
The budgetary system is a relevant accounting tool to the decision-making within the high complex context of the contemporary reality, since it represents a prospect of the business vision, translating its strategy and offering conduct guidance. The budgetary systems composition and the reasons for its use (as a form of targets communication, performance eva
Publicado em: 2008
-
12. Planning under uncertainty for extended reachability goals / Planejamento sob incerteza para metas de alcançabilidade estendidas
Planning under uncertainty has being increasingly demanded for practical applications in several areas that require reliable solutions for complex goals. In sight of this, in the last few years, some approaches based on formal methods for automatic synthesis of plans have been proposed in the area of Planning in Artificial Intelligence. Among these approache
Publicado em: 2007