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

A comparative study of sequential optimality conditions for Mathematical Programs with Cardinality Constraints
2022, Journal of Optimization Theory and Applications, Ribeiro, A. A. ; Sachine, M. ; Krulikovski, E. H. M.
A note on the worst-case complexity of nonlinear stepsize control methods for convex smooth unconstrained optimization
2022, OPTIMIZATION, Garmanjani,R
A family of optimal weighted conjugate-gradient-type methods for strictly convex quadratic minimization
2022, NUMERICAL ALGORITHMS, Oviedo,H;Andreani,R;Raydan,M
Using first-order information in direct multisearch for multiobjective optimization
2022, OPTIMIZATION METHODS & SOFTWARE, Andreani,R;Custodio,AL;Raydan,M
Operations research applicability in spatial conservation planning
2022, JOURNAL OF ENVIRONMENTAL MANAGEMENT, Alagador,D;Cerdeira,JO
An extended delayed weighted gradient algorithm for solving strongly convex optimization problems
2022, JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, Andreani,R;Oviedo,H;Raydan,M;Secchin,LD
Parallel strategies for Direct Multisearch
2022, NUMERICAL ALGORITHMS, Tavares,S;Bras,CP;Custodio,AL;Duarte,V;Medeiros,P
Teaching courses heavily dependent on computational resources to STEM students during Pandemics
2022, Computer Aided Chemical Engineering, Chibeles Martins,N;Afonso,LB
Lexicographic optimization for the multi-container loading problem with open dimensions for a shoe manufacturer
2022, 4OR-A QUARTERLY JOURNAL OF OPERATIONS RESEARCH, Vieira,MVC;Carvalho,M
Introduction to the special issue on Advances in Facility Location and Logistics
2022, EURO JOURNAL ON TRANSPORTATION AND LOGISTICS, Correia,I;Melo,T;Peton,O

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,...
Altera√ß√Ķes clim√°ticas 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):¬†Subselect.¬†CHECK¬†DOWNLOADS¬†HERE.