用于通过LabView演示帕斯瓦尔定理的原理,帕斯瓦尔定理，信号的总能量既可以按照每单位时间内的能量在整个时间内的积分计算出来，也可以按照每单位频率内的能量在整个频率范围内的积分而得到。-By principle for the demo LabView Pars　theorem, Pars　theorem, the total energy of the signal in accordance with either energy per unit time over the entire integration time is calculated to be in accordance with the energy per unit frequency within the entire integral range of frequencies is obtained.