频率调制

With the help of linear method, we discussed the frequency ranges in space and time when the modulation instabilities can happen.

在平面波理想情况下，用线性分析法讨论了调制非稳性可能发生的空间、时间频率范围。

The actual information in a modulated signal is contained in its sidebands, or frequencies added to the carrier wave, rather than in the carrier wave itself.

在调制后信号的所有信息包含在其边带中，或加载在负有电波的频率中。而不是其电波载体自身。

The superposition is formed between the bound state and the autoionization state for the intense Rabi frequencies. The population of symmetric superposition is the same to that of asymmetric superposition, and the both are modulated by the delay tune.

由于中间激发态和自电离态之间的Rabi频率较大而形成了叠加态，对叠加态的分析显示，粒子在对称叠加态和反对称叠加态上的布居完全相同，并且受到延迟时间的调制。

In this spectroscopy, both laser frequency and Zeeman effect of a sample are modulated, and then the signal with high signal to noise will be obtained by double demodulation.

它同时对激光频率和样品的塞曼效应进行调制，然后通过双解调来提取微弱的光谱信号。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。