电力系统中根据电压电流计算阻抗，其中使用半周积分算法计算电压电流的有效值-Power system voltage and current calculation based on impedance, in which the use of half integral algorithm of the RMS voltage and current

labview 数字电压表 功能描述：实现仿真信号的电压测量，显示信号频率、标准频率、相位、幅值、直流偏置、峰值、平均值和有效值，并以图形方式显示仿真信号。-labview digital voltmeter Descr iption: Implementation of the simulated signal voltage measurement, display the signal frequency, standard frequency, phase, amplitude, DC

通过单片机控制可控硅导通角 从而达到控制 220v电压有效值 改变灯光亮度-By SCM control thyristor conduction angle so as to control the light intensity changes in RMS voltage 220v