The original values of lead impedance and pacing thresholds were tested and compared by t-test between groups.
术中测定心房、心室起搏阈电压和电极阻抗，组间进行t检验。
Moreover, for the fixed power setting of PZT transducer, the temperature change can lead to difference in actual power and impedance of PZT transducer.
而且，对于恒定额定功率设置的PZT换能器系统，温度的改变导致PZT换能器实际加载的功率及阻抗的改变。
A guard is a low impedance point in the circuit that's at nearly the same potential as the high impedance lead being guarded.
保护是强制将电路中的一个低阻节点与高阻输入端节点近似等电位的一种技术。
This paper presents a method of the lead-acid battery internal resistance measurement based on AC impedance method.
给出了一种基于交流阻抗法的铅酸蓄电池内阻测量方法。
The impedance of foamed cement is lower compared to conventional cement. It may lead to wrong results to assess the coupling be - tween foamed cement and pipe from the amplitude of CBL.
与常规水泥相比，泡沫水泥声阻抗值较低，用CBL中的常规声幅曲线评价泡沫水泥与套管的胶结质量，可能会得出错误的解释结果。
But for high frequency problem and complex structure, too dense grid of object will lead to dense impedance matrix and many unknown variables, so the computational efficiency will be very low.
但是在处理高频问题和具有精密结构的缝隙时，对目标剖分过密会导致稠密的阻抗矩阵，未知量增加，影响计算的效率。
But for high frequency problem and complex structure, too dense grid of object will lead to dense impedance matrix and many unknown variables, so the computational efficiency will be very low.
但是在处理高频问题和具有精密结构的缝隙时，对目标剖分过密会导致稠密的阻抗矩阵，未知量增加，影响计算的效率。
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