Γ-opt Research Group
Γ-opt Research Group
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Publications
2
A parallelizable augmented Lagrangian method applied to large-scale non-convex-constrained optimization problems
We contribute improvements to a Lagrangian dual solution approach applied to large-scale optimization problems whose objective …
Natashia Boland
,
Jeffrey Christiansen
,
Brian Dandurand
,
Andrew Eberhard
,
Fabricio Oliveira
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DOI
Enhancing the normalized multiparametric disaggregation technique for mixed-integer quadratic programming
We propose methods for improving the relaxations obtained by the normalized multiparametric disaggregation technique (NMDT). These …
Tiago Andrade
,
Fabricio Oliveira
,
Silvio Hamacher
,
Andrew Eberhard
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DOI
Two-stage stochastic programming approach for the medical drug inventory routing problem under uncertainty
Medical drug shortages are an important issue in health care, since they can significantly affect patients’ health. Thus, …
Erfaneh Nikzad
,
Mahdi Bashiri
,
Fabricio Oliveira
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DOI
Optimizing Workover Rig Fleet Sizing and Scheduling Using Deterministic and Stochastic Programming Models
We present deterministic and stochastic programming models for the workover rig problem, one of the most challenging problems in the …
Miguel Fernández Pérez
,
Fabricio Oliveira
,
Silvio Hamacher
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DOI
Disaster relief supply pre-positioning optimization: A risk analysis via shortage mitigation
Problems related to disaster management are strongly influenced by random outcomes, which indicates the importance of using a …
Lucas Condeixa
,
Adriana Leiras
,
Fabricio Oliveira
,
Irineu de Brito
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DOI
Periodic review system for inventory replenishment control for a two-echelon logistics network under demand uncertainty: a two-stage stochastic programming approach
We propose a novel methodology for replenishment and control systems for inventories of two-echelon logistics networks using a …
Paulo Cunha
,
Fabricio Oliveira
,
Fernanda Raupp
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DOI
A two-stage stochastic programming model for periodic replenishment control system under demand uncertainty
The inventory control system consists of defining strategies to manage inventory replenishment such that costs involved in ordering, …
Paulo Cunha
,
Fernanda Raupp
,
Fabricio Oliveira
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DOI
A two-stage stochastic programming model for inventory management in the blood supply chain
Managing inventories in the blood supply chain is a challenging task, mainly due to the uncertain nature of the demand for blood units, …
Mary Dillon
,
Fabricio Oliveira
,
Babak Abbasi
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DOI
Improving maritime inventory routing: application to a Brazilian petroleum case
The crude oil offloading and supply problem (COSP) is a type of operation maritime inventory routing (MIR) problem encountered by …
Gustavo Souto dos Santos Diz
,
Fabricio Oliveira
,
Silvio Hamacher
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DOI
A new mathematical model for the workover rig scheduling problem
One of the most important activities in the oil and gas industry is the intervention in wells for maintenance services, which is …
Miguel Pérez
,
Fabricio Oliveira
,
Silvio Hamacher
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DOI
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