By Andrzej Lewandowski, Paolo Serafini, Maria Grazia Speranza (eds.)
The booklet goals at giving the methodological framework for layout determination help structures. a number of purposes also are defined intimately, starting from surroundings regulate, construction making plans, transportation making plans. The publication is of particular curiosity to operations researchers, surroundings experts, creation planners, and transportation engineers.
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Example text
If the forecast is perfect (at = at) and rt E Rt• for any t, the indicators A and F at the end of the current year and the years to follow are guaranteed to be smaller than two preassigned values A' and F'. This guarantee holds if the future inflows are formed by any concatenation of K one-year-long "reference" inflow sequences. In the case of Lake Corno K was equal to 7, and the reference inflow sequences were 42 G. Guariso, S. Rinaldi, R. Soncini-Sessa those corresponding to the seven years of the period (1946-1981) that the manager felt to be most critical from the hydrological point of view.
The optimal solutions of these problems have been obtained by off-line nonlinear mathematical programming, which has also been used to calibrate the three different forecasting models implemented in the DSS. The manager has been using the DSS since the end of 1981. A detailed statistical analysis carried out on the data of the first years of operation [14] has shown that the DSS has positively influenced the manager who has, in particular, controlled the floods much more effectively than in the past.
Rinaldi, R. Soncini-Sessa 32 items: the date t, and the lake level xt at the beginning of the day. In other words, to take his decision the manager can use a function called the efficient operating rule, which is programmed on his microcomputer. This function was determined by off-line solving of a multiobjective optimization problern [4], [5] in which the objective was the minimization of the annual expected values of the three physical indicators A (water shortage in agriculture), E (electric power loss) and F (number of flooding days).