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Matheuristics for robust optimization : application to real-world problems

Toklu, Nihat Engin ; Gambardella, Luca Maria (Dir.) ; Montemanni, Roberto (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2014 ; 2014INFO008.

In the field of optimization, the perspective that the problem data are subject to uncertainty is gaining more and more interest. The uncertainty in an optimization problem represents the measurement errors during the phase of collecting data, or unforeseen changes in the environment while implementing the optimal solution in practice. When the uncertainty is ignored, an optimal solution...

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Approximability of precedence constrained and robust scheduling problems

Mutsanas, Nikos ; Gambardella, Luca Maria (Dir.) ; Mastrolilli, Monaldo (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2010 ; 2010INFO003.

We study the approximability of scheduling problems in different contexts. We first give a short introduction to the field of scheduling theory and present a simple single machine scheduling problem that will form the base for all variants considered in the remainder of this thesis. We point out that this scheduling problem, though long known to be efficiently solvable in its original form,...

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