Browsing by Author "Pedroso, J. P."
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- A new MILP based approach for unit commitment in power production planningPublication . Viana, Ana; Pedroso, J. P.This paper presents a complete, quadratic programming formulation of the standard thermal unit commitment problem in power generation planning, together with a novel iterative optimisation algorithm for its solution. The algorithm, based on a mixed-integer formulation of the problem, considers piecewise linear approximations of the quadratic fuel cost function that are dynamically updated in an iterative way, converging to the optimum; this avoids the requirement of resorting to quadratic programming, making the solution process much quicker. From extensive computational tests on a broad set of benchmark instances of this problem, the algorithm was found to be flexible and capable of easily incorporating different problem constraints. Indeed, it is able to tackle ramp constraints, which although very important in practice were rarely considered in previous publications. Most importantly, optimal solutions were obtained for several well-known benchmark instances, including instances of practical relevance, that are not yet known to have been solved to optimality. Computational experiments and their results showed that the method proposed is both simple and extremely effective.
- A Radboud Faces Database como ferramenta para o estudo do reconhecimento de emoções: uma investigação em PortugalPublication . Dores, Artemisa Rocha; Barbosa, Fernando; Marques, António; Oliveira, M. Q.; Pedroso, J. P.; Caldas-Castro, A.; Carvalho, I.P.Este trabalho tem como objectivo a apresentação de dados normativos do reconhecimento de sete expressões faciais com conteúdo emocional, e uma neutra, de modelos caucasianos adultps, da Radboud Faces Database.