Mathematics – Probability
Scientific paper
2009-11-22
Mathematics
Probability
37 pages; The paper substantially differs from earlier versions in arXiv:math/0701458. These results are obtained for a more g
Scientific paper
This paper studies large dam models where the difference between lower and upper levels, $L$, is assumed to be large. Passage across the levels leads to damage, and the damage costs of crossing the lower or upper level are proportional to the large parameter $L$. Input stream of water is described by compound Poisson process, and the water cost depends upon current level of water in the dam. The aim of the paper is to choose the parameters of output stream (specifically defined in the paper) minimizing the long-run expenses. The particular problem, where input stream is ordinary Poisson and water costs are not taken into account, has been studied in [Abramov, \emph{J. Appl. Prob.}, 44 (2007), 249-258]. The present paper addresses the question \textit{How does the structure of water costs affect the optimal solution?} Under natural assumptions we prove an existence and uniqueness of a solution and study the case of linear structure of the costs.
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