where the square bracket denotes integer truncation.

The other wind-power average used in the regulation of the utility system is the average wind energy production in the previous 4 h, *A*_{4}, which is used every hour in conjunction with the expected load for the following hour to make a trial estimate of the required number of intermediate-load units, ${n}_{i\mathit{nt}}^{trial},$

${n}_{int}^{trial}=\mathrm{integer}\left(\frac{{E}_{av}{C}_{1}{C}_{2}(t+1h)-{A}_{4}}{0.1{E}_{av}}\right)-{n}_{base}+2,$

where the operation “integer” ...

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