Mixed integer linear programming formulation techniques

JP Vielma - Siam Review, 2015 - SIAM
A wide range of problems can be modeled as Mixed Integer Linear Programming (MIP)
problems using standard formulation techniques. However, in some cases the resulting MIP …

Tightening piecewise McCormick relaxations for bilinear problems

PM Castro - Computers & Chemical Engineering, 2015 - Elsevier
We address nonconvex bilinear problems where the main objective is the computation of a
tight lower bound for the objective function to be minimized. This can be obtained through a …

OptiMathSAT: A tool for optimization modulo theories

R Sebastiani, P Trentin - International conference on computer aided …, 2015 - Springer
Many SMT problems of interest may require the capability of finding models that are optimal
wrt. some objective functions. These problems are grouped under the umbrella term of …

Optimization modulo theories with linear rational costs

R Sebastiani, S Tomasi - ACM Transactions on Computational Logic …, 2015 - dl.acm.org
In the contexts of automated reasoning (AR) and formal verification (FV), important decision
problems are effectively encoded into Satisfiability Modulo Theories (SMT). In the last …

Improved Big-M reformulation for generalized disjunctive programs

F Trespalacios, IE Grossmann - Computers & Chemical Engineering, 2015 - Elsevier
In this work, we present a new Big-M reformulation for Generalized Disjunctive Programs.
Unlike the traditional Big-M reformulation that uses one M-parameter for each constraint, the …

Operating room scheduling with generalized disjunctive programming

PM Castro, I Marques - Computers & Operations Research, 2015 - Elsevier
This paper addresses the short-term scheduling problem involved in the selection of a
subset of elective surgeries from a large waiting list. In order to overcome the combinatorial …

Design of memetic algorithms for the efficient optimization of chemical process synthesis problems with structural restrictions

M Urselmann, S Engell - Computers & Chemical Engineering, 2015 - Elsevier
In Urselmann et al., 2011a, Urselmann et al., 2011b we presented a memetic algorithm (MA)
for the design optimization of reactive distillation columns. The MA is a combination of a …

Long-term turnaround planning for integrated chemical sites

S Amaran, NV Sahinidis, B Sharda, M Morrison… - Computers & Chemical …, 2015 - Elsevier
An integrated chemical site involves a complex network of chemical plants. Typically, these
plants interact closely, are dependent on each other for raw materials and demand for their …

Optimal scheduling of single stage batch plants with direct heat integration

PM Castro, B Custódio, HA Matos - Computers & Chemical Engineering, 2015 - Elsevier
This paper addresses the multi-objective optimization problem arising in the operation of
heat integrated batch plants, where makespan and utility consumption are the two conflicting …

Optimization of facility location and reallocation in an industrial plant through a multi-annual framework accounting for economic and safety issues

J Martinez-Gomez, F Nápoles-Rivera… - Journal of Loss …, 2015 - Elsevier
The industrial layout traditionally has been addressed accounting for the facilities
distribution and installation since the first day of operation of the plant; this is, without …