有效值：{{ this.Xrms }}
平均值：{{ this.envelopeList.mean_value }}
最大值：{{ this.envelopeList.max_value }}
最小值：{{ this.envelopeList.min_value }}
峰值：{{ this.envelopeList.Xp }}
峰峰值：{{ this.envelopeList.Xpp }}
波形因子：{{ this.envelopeList.Sf }}
脉冲指标：{{ this.envelopeList.If }}
裕度指标：{{ this.envelopeList.Ce }}
偏度指标：{{ this.envelopeList.Cw }}
峭度指标：{{ this.envelopeList.Cq }}