“…At an arbitrary time , the value of this coefficient is determined by the ratio of the volume of electricity , (1) generated over the reporting period , to the volume of its output by the installed capacity for the same period of time, i.e. , (2) where and are the capacities of the unit , respectively, developed at the time and installed. From the definition (2) follows the equation , (3) which can be used for predictive estimates of the volumes of electricity generation if the function can be predetermined.…”