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Scope for industrial applications of production scheduling models and solution ...
Harjunkoski, Iiro; Maravelias, Christos T.; Bongers, Peter; Castro, Pedro; Engell, Sebastian; Grossmann, Ignacio E.; Hooker, John; Mendez, Carlos A.This paper gives a review on existing scheduling methodologies developed for process industries. Above all, the aim of the paper is to focus on the industrial aspects of scheduling and discuss the main characteristics, including strengths and weaknesses of the presented approaches. It is claimed that optimization tools of today can effectively support the plant level production. However there is still clear pot...
Biofilmes em endodontia
Castro, Pedro Coimbra de Almeida Osório deProjeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária ; Introdução: Um biofilme é uma comunidade estruturada de células bacterianas envolvidas numa matriz constituída por substâncias poliméricas e aderido a uma superfície sólida. Esta comunidade permite um modo protegido de crescimento que permite a sobrevi...
Multi-parametric disaggregation technique for global optimization of polynomial...
Teles, João P.; Castro, Pedro; Matos, Henrique A.This paper discusses a power-based transformation technique that is especially useful when solving polynomial optimization problems, frequently occurring in science and engineering. The polynomial nonlinear problem is primarily transformed into a suitable reformulated problem containing new sets of discrete and continuous variables. By applying a term-wise disaggregation scheme combined with multi-parametric el...
Global optimization of bilinear programs with a multiparametric disaggregation ...
Kolodziej, Scott; Castro, Pedro; Grossmann, Ignacio E.In this paper, we present the derivation of the multiparametric disaggregation technique (MDT) by Teles et al. (J. Glob. Optim., 2011) for solving nonconvex bilinear programs. Both upper and lower bounding formulations corresponding to mixed-integer linear programs are derived using disjunctive programming and exact linearizations, and incorporated into two global optimization algorithms that are used to solve ...
Comparison of global optimization algorithms for the design of water-using netw...
Castro, Pedro; Teles, João P.We address a special class of bilinear process network problems with global optimization algorithms iterating between a lower bound provided by a mixed-integer linear programming (MILP) formulation and an upper bound given by the solution of the original nonlinear problem (NLP) with a local solver. Two conceptually different relaxation approaches are tested, piecewise McCormick envelopes and multiparametric dis...
Univariate parameterization for global optimization of mixed-integer polynomial...
Teles, João P.; Castro, Pedro; Matos, Henrique A.This paper presents a new relaxation technique to globally optimize mixed-integer polynomial programming problems that arise in many engineering and management contexts. Using a bilinear term as the basic building block, the underlying idea involves the discretization of one of the variables up to a chosen accuracy level (Teles, J.P., Castro, P.M., Matos, H.A. (2013). Multiparametric disaggregation technique fo...
Resource-task network formulations for industrial demand side management of a s...
Castro, Pedro; Sun, Lige; Harjunkoski, IiroIn today’s energy markets, there is a growing effort toward the alignment of the industrial sector and the power grid for the sake of efficient energy distribution and consumption. In this paper, the resource-task network is used to provide a generic modeling framework for production scheduling under energy constraints. Three alternative process models for the energy-intensive melt shop of a steel plant are pro...
Analisar e estabilizar o processo de fundição injetada de alumínio para minimiz...
Castro, Pedro Nuno Pires Dias deTrabalho realizado na STA, orientado pelo Eng. Manuel Casais ; Tese de Mestrado Integrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2013
Relatório de estágio em edição no Grupo LeYa
Castro, Pedro RainhoO presente relatório propõe-se apresentar a Divisão de Novos Autores Portugueses da casa editora LeYa e relatar, criticamente, as atividades que nela desenvolvi no âmbito do Estágio Curricular afeto ao Mestrado em Estudos Editoriais, que decorreu de 1 novembro de 2010 a 31 de abril de 2011. ; This report describes the activities I developed in the New Portuguese Writers’ Division of the publishing group LeYa, ...
Hospital Efficiency: Directed internship: Deloitte & NOVA SBE
Castro, Pedro Sucena eA Work Project, presented as part of the requirements for the Award of a Masters Degree in Economics from the NOVA – School of Business and Economics ; In a context of economic recession, where resource scarcity follows every manager, efficiency is the only way out. Health Care is no exception. Continuous budgetary cuts from central authorities led to increasing pressures in hospital managers to achieve effici...
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