分析了电子计数器时间间隔法测定电秒表的原理、误差及不稳定性，并且介绍了一种简便的门控法。
This paper analyses principle, error, and unstable state of determining the electric stop watch by means of time-interval method of electric counter. A simple gate-control method is presented at last.
所有大门控制器不断连接中央服务器，并且任何的离线控制器会通过电子邮件提醒管理员。
All door controllers are in continual contact with the central server, and any offline controller alerts the manager via email.
通过电子快门控制像增强器开启时间实现时间分辨。
Time resolution can be achieved by controlling the shutter time of the image intensifier with an electronic pulse.
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