When flying objects with high speed pass through the laser screen, change of light flux is transformed into electronic signal and sampled by data sampling card and processed by computer.
当高速飞行物体穿越激光光幕时，光通量的变化被转变为电信号并采集到计算机进行数据处理。
2
Methods The diagnosis and differential diagnosis for patient with fever were made by using the three "pass form" screen during the period of prevention of SARS and the intermittence of SARS.