Stochastic Programming Recourse Models: Approximation, Risk Aversion, Applications in Energy - Brossura

Eichhorn, Andreas

 
9783832517755: Stochastic Programming Recourse Models: Approximation, Risk Aversion, Applications in Energy

Sinossi

In this thesis the optimization framework of stochastic programming with recourse is considered. Emphasis is placed on programs incorporating integrality constraints, dynamic decision structures (multi-stage stochastic programs), or risk aversion requirements. In the first part, Monte Carlo approximations for two-stage stochastic programs with integrality constraints are studied. In particular, the asymptotic behavior of the optimal values is analyzed. A central limit theorem for the optimal value is proven by using empirical process theory and concepts of differentiability in infinite dimensional spaces. Such a limit theorem has formerly been known only for simpler special cases. Beside being of theoretical interest, limit theorems may be useful for getting information about the accuracy of an approximate optimal value and for determining an appropriate sample size for a practical problem. Therefore, resampling methods (bootstrap) are suitably adapted and, for illustration, applied to a test problem. For stochastic programs possibly incorporating dynamic decision structures a special strategy of risk aversion is suggested and analyzed in the second part, namely the class of polyhedral risk measures: The value of a risk functional from this class can be calculated as the optimal value of a specific stochastic program with recourse which is of particular simple nature. Polyhedral risk measures are intended for objectives of general stochastic programs. Then, the two nested stochastic programs can be unified to one stochastic program with classical linear objective. This possibility can be useful for algorithmic decomposition approaches. Polyhedral risk measures are analyzed with respect to coherence axioms from risk theory. Criteria for verifying such properties for a concrete polyhedral risk measure are deduced by means of convex duality theory. Moreover, new and known instances of polyhedral risk measures are pres

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