Fixed photoelectric detectors on the two reflectors, they produce a pulse signal as reference signal every round.

在两个反射镜上安装光电探测器，使之转一周产生一个脉冲信号作为基准信号。

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The effect of a volumetric heat source induced by pulse laser heating in the temperature fields of a fine round ceramic bar was investigated experimentally and theoretically.

用脉冲激光模拟微小圆柱陶瓷棒的脉冲内热源情形，实验研究了脉冲内热源对圆柱陶瓷端面温度场变化施加的影响。

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The machine that Dr O'Brien and Dr Frazier have designed to get round these constraints consists of a transmitter that sends out a pulse of sound at a frequency of 6 kilohertz, and an array of 52 receivers that collect the reflections from anything buried beneath the surface.

ECONOMIST: Archaeology

That fleeting pulse, a 20-nanosecond flash, can't arrive at once or the tiny round target will warp, making ignition impossible.

FORBES: A Nuclear Hybrid