The mechanic-electrical dynamic performance is determined by q-axis sub-system, and the voltage regulation performance is determined by d-axis sub-system.
机电动态性能由机电-交轴子系统所决定，电压调节性能由直轴子系统所决定。
No significant differences were found in the heart rate, QRS intervals, Q T intervals, sinus bradycardia, sinus tachycardia and left axis deviation between exposed and control groups ( P >0 05).
其余心率、QRS间期、Q-T间期的数值以及窦性心动过缓、窦性心动过速和心电轴左偏等发生率，两组之间均无差异（P＞0．05）。
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