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。
By envelope demodulation of the resonance in a range of high frequency caused by the shock of low frequency, the resonance demodulation technique can effectively extract the shock features.
共振解调技术对低频冲击的高频共振波形进行包络检波，可以有效地提取低频冲击特征。
AIM To develop demodulation methods with high anti-noise ability and high speed for data acquisition system inelectrical impedance multi-frequency and parameter tomography.
目的研究一种用于电阻抗多频及参数成像数字采集系统的具有高抗噪性能和快速的解调方法。
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