If a voltage change requires that a different tap be selected, the new tap is electronically switched in precisely at the zero-crossing, to avoid distorting the AC waveform.
如果电压变化需要选择不同的自来水，新的电子开关水龙头恰恰是在零交叉，以避免扭曲的交流波形。
Based on switch function model of TCSC and MATLAB, the digital simulation method in researching zero-crossing point characteristic of the capacitor voltage is put forward.
该文基于TCSC的开关函数模型并借助MATLAB仿真工具，提出了研究电容电压过零点特性的数字仿真方法。
The stability of the welding arc depends mainly on the voltage and the gas ionization when current zero-crossing as well as the electron emission ability of the electrode.
其电弧稳定与否，主要取决于电流过零瞬间的电弧空间电离度、 电极发射电子能力及再引燃电压的上升速度。
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