6倍方差法，时间序列，求正常序列的报警阈值-6 sigma method, which used on the time series data, and solve its alarm limit

使用multisim设计的数电小实验 路灯控制电路 举重裁判表决器 开关报警电路-Use multisim design small number of electric street lighting control circuit weightlifting referee experiment arbiter switch alarm circuit