Operations Research

NOVA Math > Research Groups > Operations Research

About

The Operations Research group develops its activity with a focus on optimization, modeling, algorithmic development and implementation. Within nonlinear optimization, fractional quadratic problems, semidefinite programming, complementarity problems, derivative-free and multiobjective optimization are some of the areas in which the group members had a relevant impact. The group also works in combinatorial optimization, with impact in facility and hub location problems, project scheduling, timetabling, and facility layout optimization. There is a strong component of applications and collaboration with industry, requiring not only algorithmic development but also modelling skills. Contributions appear in supply chain design, reverse logistics, biology of conservation, health and ageing related problems.

Maria Isabel Azevedo Rodrigues Gomes

Operations Research Coordinator

Team

Publications

SLiSeS: subsampled line search spectral gradient method for finite sums
2024, OPTIMIZATION METHODS & SOFTWARE, Bellavia,S;Krejic,N;Jerinkic,NK;Raydan,M
A hybrid direct search and projected simplex gradient method for convex constrained minimization
2024, OPTIMIZATION METHODS & SOFTWARE, Custodio,AL;Krulikovski,EHM;Raydan,M
An assessment of numerical and geometrical quality of bases on surface fitting on Powell-Sabin triangulations
2024, MATHEMATICS AND COMPUTERS IN SIMULATION, Fortes,MA;Raydan,M;Rodriguez,ML;Sajo Castelli,AM
A new algorithm for inference in HMM's with lower span complexity
2024, COMPUTATIONAL STATISTICS & DATA ANALYSIS, Pereira,D;Nunes,C;Rodrigues,R
A matheuristic for a multi-period three-echelon network design problem with temporary capacity acquisition
2024, COMPUTERS & INDUSTRIAL ENGINEERING, Correia,I;Melo,T
A linear ordering problem with weighted rank
2024, JOURNAL OF COMBINATORIAL OPTIMIZATION, Vieira,MVC
Derivative-free separable quadratic modeling and cubic regularization for unconstrained optimization
2024, 4OR-A QUARTERLY JOURNAL OF OPERATIONS RESEARCH, Custodio,AL;Garmanjani,R;Raydan,M
A Hybrid Biased-Randomized Heuristic for a Home Care Problem with Team Scheme Selection
2024, METAHEURISTICS, MIC 2024, PT I, de Aguiar,AR;Gomes,MI;Ramos,T;Ramalhinho,H
A trust-region approach for computing Pareto fronts in multiobjective optimization
2024, COMPUTATIONAL OPTIMIZATION AND APPLICATIONS, Mohammadi,A;Custodio,AL
A Biased Random-Key Genetic Algorithm for the Home Care Routing and Scheduling Problem: Exploring the Algorithm's Configuration Process
2023, Springer Proceedings in Mathematics and Statistics, Aguiar,AR;Ramos,T;Gomes,MI

Projects

The Effects of Portuguese Colonialism in Africa: Justice, Electricity and Transport Infrastructures
FCT - Fundação para a Ciência e a Tecnologia, I.P., Jorge Orestes Cerdeira
Novel therapeutic approaches to target GNE Myopathy
European Joint Programme on Rare Diseases (EJP RD), Regina Bispo and Isabel Gomes
AI-4-MUFF: Artificial intelligence on the management of the degree of readiness in urban firefighting
FCT - Fundação para a Ciência e a Tecnologia, I.P., Isabel Gomes, Jorge Orestes Cerdeira, Filipe Marques,...
Alterações climáticas e seu impacto em florestas de pinheiro ao longo da costa oeste portuguesa: o caso de duas pragas recentemente emergidas
FCT - Fundação para a Ciência e a Tecnologia, I.P., Jorge Orestes Cerdeira
BoostDFO: Improving the performance and moving to newer dimensions in Derivative-Free Optimization
FCT - Fundação para a Ciência e a Tecnologia, I.P., Ana Luísa Custódio, Maria do Carmo Brás, Rohollah...
Estudo prévio sobre a implementação da recolha seletiva em Portugal Continental insidindo em especial sobre o fluxo dos bioresíduos
APA - Agência Portuguesa do Ambiente, Isabel Gomes
Biodiversity Conservation, Global Change and Uncertainties: Reconciling Biodiversity Persistence and Human Development upon Dynamic Environments (RECONCILE)
FCT - Fundação para a Ciência e a Tecnologia, I.P., Jorge Orestes Cerdeira
MiMaMathematics in the Making
Lifelong Learning Programme of the European Union Project (EU), Susana Baptista, Nelson Chibeles Martins,...
Sparse and Smoothing Methods for Nonlinear Optimization of Complex Models
FCT - Fundação para a Ciência e a Tecnologia, I.P., Ana Luísa Custódio
Species Performance Modeling Algorithm (S-PerforMA)
FCT - Fundação para a Ciência e a Tecnologia, I.P., Jorge Orestes Cerdeira

Software

    • a solver for constrained or unconstrained derivative-free optimization problems:: SID-PSM
    • a solver for multiobjective derivative-free optimization problems: DMS , BoostDMS
    • a solver suited for global derivative-free constrained optimization: GLODS
    • a solver suited for global derivative-free multiobjective constrained optimization: MultiGLODS
    • an open-source application, licensed under the GPL v3, designed to select connectivity linkages for distinct types of habitats, under a cost-efficient protocol: MulTyLink
    • a package for selecting variable subsets. Contributed packages of The Comprehensive R Archive Network (CRAN): SubselectCHECK DOWNLOADS HERE.