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1·The two digital signal types are the on-off signal and the pulse train signal.

这两类数字信号分别为通断信号和脉冲序列信号。

2·Two-level systems under the action of a laser pulse train are studied by rotating-wave approximation.

本文采取旋波近似，分析了序列脉冲激光作用下的双能级系统。

3·The new methods can be used in both detection of FMCW echo and frequency estimation of correlative pulse train.

这两种方法既可用于多段线性调频连续波探测回波的积累检测，也可用于多个相参脉冲信号的积累与频率估计。

4·Light source in optical transmission system, waveform shaper, optical pulse train generator, and optical reproduction system.

光传输系统中的光源，波形整形器，光脉冲串发生装置以及光再现系统。

5·The experimental results reveal that the transistor type pulse train generator is unsuitable for micro-EDM due to its low removal rate.

实验结果表明，自振式晶体管脉冲电源因其加工速度慢并不适于微细放电加工。

6·Level dropout: This detects an edge followed by a specified time with no edges. It is useful for triggering on the end of a pulse train.

水平失真触发：当信号变高或者变低，并保持此状态超过指定时间时触发。这是很有用的对于脉冲串的末端触发。

7·The theoretical results show placing the acoustic-optic Q-switch crystal near the output mirror can improve the stability of pulse train.

计算表明：Q开关放置在输出镜一侧会使脉冲序列更加稳定。

8·A new method for ultrashort optical pulse train generation from a cw signal in the normal dispersion regime of optical fibers is suggested.

提出一种在单模光纤正常色散区由连续波产生超短光脉冲串的新方法。

9·To improve the range resolution of Mono-Pulse Train (MPT), the linear step frequency signal is introduced and used widely in modern radars.

为了提高脉冲串信号的距离分辨力，曾有文献提出了对子脉冲的载频进行线性递增的方法。

10·This method can be used to describe the resonant multi-photon processes that the pulse train from the mode locked laser interacting with atoms.

用多模相干态描述光场，应用预解算符和投影算符推导演化算符，使本方法可统一处理锁模激光脉冲序列输出及原子的共振多光子过程。