PTC发热元件10章输入测试
If the power input varies throughout the operating cycle and the maximum value of the power input exceeds, by a factor greater than two, the power input is determined a the arithmetic mean value of the power input occurring during a representative period, then the power input is the maximum value that is exceeded for more than 10 % of the representative period. Otherwise the power input is taken as the arithmetic mean value.这段怎么理解，请大佬解答啊！
取30分钟， 输入测试周期的积分值 和 该周期peak x 90% 比较， 哪个大去哪个:lol
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