基于时延测量的水声跟踪定位系统，当信号传播时延大于脉冲重复周期时，就会出现距离模糊。
For underwater acoustic positioning system based on measurement of time_delay, range ambiguity appears when pulse's propagating time is longer than its repetition period.
详细分析了周期测、频率法利用编码器脉冲计算超低转速时的分辨率及绝对误差，给出了影响转速测量的影响因素。
The resolution and error were analyzed based on frequency measurement and period measurement, and the factors were given that influencing the speed measurements.
当选择自动增益方式时，增益的改变通过增益同步脉冲触发，触发脉冲可由系统内部周期产生或外部提供。
When the former was chosen, the change of gain would come true by the synchro pulse, which was supplied by the cycle inside the system or outside the system.
这种算法不仅能够跟踪快变的基音周期，增强不规则脉冲时基音周期的估计；还能够鲁棒地估计陡变的基音周期。
The algorithm can not only track rapidly changed pitch, and enhance pitch estimation with irregular pulse, but also make robust estimation of sharply changed pitch.
研究发现，当采用12个光学周期的特定组合脉冲时，孤立阿秒脉冲可以实现。
It is shown that by adopting particular combined pulse with 12 optical cycles, single attosecond pulse can be obtained.
然而，依照本发明可替换实施例，在数字信号处于逻辑低电平状态时，脉冲也可指时间周期。
However, according to alternative embodiments of the present invention, a pulse can refer to a period of time when a digital signal is in a logic low state.
通常，在数字信号处于逻辑高电平状态时，脉冲指时间周期。
Typically, a pulse refers to a period of time when a digital signal is in a logic high state.
通常，在数字信号处于逻辑高电平状态时，脉冲指时间周期。
Typically, a pulse refers to a period of time when a digital signal is in a logic high state.
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