Zero-crossing detecting approach is used to detect the phasor of generators.

我们采用了过零检测来测量发电机的功角。

Traditionally, the method of bar code recognition is based on zero crossing of the second derivative.

传统的条码识别方法是通过二阶导数零交叉来定位条码边界.

The reason is that soonest at the next current zero-crossing the firing pulse of thyristors can be reset.

通常的短路故障电流会大大高于这个倍数，而软启动器的晶闸管本身是没有短路分断能力的。

Then the zero-crossing detection method and the DFT algorithm adopted in the phasor measurement are discussed in detail.

接着，介绍了同步相量测量的信号过零检测法、定频采样和变频采样的离散傅立叶法。

Quality square wave power supply, current zero crossing time is short , arc stability , arc without high frequency stability.

优质方波电源，电流过零时间短，电弧稳定，无需高频稳弧。

A zero-crossing derivative spectrophotometry method is established for the determination of ofloxacin in ofloxacin glucose injection.

用零交导数分光光度法测定氧氟沙星葡萄糖注射液中氧氟沙星的含量。

AC control is a normal application for triacs and SCRs because the turnoff time is decreased when the device is switched off during a zero-crossing.

由于器件在过零时被关断会降低关断时间，所以双向晶闸管和SCR通常用于交流控制。

This paper introduces a VAD algorithm with average of the magnitude and weighted zero crossing rate, and the algorithm has been implemented by hardware.

介绍了一种平均幅度和加权过零率的VAD算法，并对该算法进行了硬件实现。

Thyristors are often used to control the flow of AC current. These thyristors can cut off the current flow only during the zero-crossing of the AC current.

人们常常使用半导体闸流管来控制交流电通断—这些闸流管只能在电流过零点时才能够切断电流。