Γ-opt Research Group
Γ-opt Research Group
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Publications
2
The p-Lagrangian relaxation for separable nonconvex MIQCQP problems
This paper presents a novel technique to compute Lagrangian bounds for nonconvex mixed-integer quadratically constrained quadratic …
Tiago Andrade
,
Nikita Belyak
,
Andrew Eberhard
,
Silvio Hamacher
,
Fabricio Oliveira
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DOI
A Systematic Literature review for the rig scheduling problem: Classification and state-of-the-art
Rigs are critical capital-intensive resources for oil and gas exploration and production operations, such as drilling, completion, and …
Iuri Santos
,
Silvio Hamacher
,
Fabricio Oliveira
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DOI
A two stage stochastic programming for asset protection routing and a solution algorithm based on the Progressive Hedging algorithm
In this paper, a two-stage stochastic programming model is developed for the asset protection routing problem (APRP) to be employed in …
Mahdi Bashiri
,
Erfaneh Nikzad
,
Andrew Eberhard
,
John Hearne
,
Fabricio Oliveira
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DOI
Efficient formulation for transportation scheduling of single refinery multiproduct pipelines
Multiproduct pipeline transportation scheduling is a complex operations research problem that is characterized by the movement of the …
Hossein Mostafaei
,
Pedro M. Castro
,
Fabricio Oliveira
,
Iiro Harjunkoski
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DOI
Sustainable sugarcane-to-bioethanol supply chain network design: A robust possibilistic programming model
Issues such as high fossil-fuel price fluctuations, considerable air pollution, and the realization that fossil sources are not …
Hani Gilani
,
Hadi Sahebi
,
Fabricio Oliveira
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DOI
Combining Progressive Hedging with a Frank--Wolfe Method to Compute Lagrangian Dual Bounds in Stochastic Mixed-Integer Programming
We present a new primal-dual algorithm for computing the value of the Lagrangian dual of a stochastic mixed-integer program (SMIP) …
Natashia Boland
,
Jeffrey Christiansen
,
Brian Dandurand
,
Andrew Eberhard
,
Jeff Linderoth
,
James Luedtke
,
Fabricio Oliveira
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DOI
A practical assessment of risk-averse approaches in production lot-sizing problems
This paper presents an empirical assessment of four state-of-the-art risk-averse approaches to deal with the capacitated lot-sizing …
Douglas Alem
,
Fabricio Oliveira
,
Miguel Carrión Ruiz Peinado
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DOI
Utility-scale energy storage in an imperfectly competitive power sector
Interest in sustainability has increased the share of variable renewable energy sources (VRES) in power generation. Energy storage …
Vilma Virasjoki
,
Afzal S. Siddiqui
,
Fabricio Oliveira
,
Ahti Salo
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DOI
Combining penalty-based and Gauss-Seidel methods for solving stochastic mixed-integer problems
In this paper, we propose a novel decomposition approach (named PBGS) for stochastic mixed-integer programming (SMIP) problems, which …
Fabricio Oliveira
,
Jeffrey Christiansen
,
Brian Dandurand
,
Andrew Eberhard
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DOI
Robust optimization of the insecticide-treated bed nets procurement and distribution planning under uncertainty for malaria prevention and control
Vector control, particularly distribution of insecticide-treated bed nets (ITNs), constitutes one of the major pathways to prevent and …
Roberto Gomes de Mattos
,
Fabricio Oliveira
,
Adriana Leiras
,
Abdon Baptista de Paula Filho
,
Paulo Gonçalves
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DOI
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