振幅包络

洛仑兹脉冲光束的复振幅包络解和复解析信号解的比较研究

Comparison of Lorentz pulsed beams obtained by using complex amplitude envelope representation and complex analytic signal representation

共振峰：使用了对频谱的振幅包络线的大体形状所作的估计。

Formant : it uses the estimation of the overall shape of the spectrum 's amplitude envelope .

小近震三分向地震图S波记录振幅包络形状及Q值测定

Envelope form of the amplitude recording of waves of three component seismograms of small near earthquakes and the determination of Q-value

对复振幅包络解奇异性的产生进行了详细分析，讨论了脉冲啁啾、脉冲宽度和模式对复振幅包络解奇异性的影响。

Generation of the singularity in the CAE solution and effects of the chirp , the pulse duration and the mode on it are analyzed .

计算结果表明当脉冲光束存在啁啾时，啁啾量越大，复振幅包络解的奇异点位置离光束中心越近，而复解析信号解在任意大小啁啾的情况下都不存在奇异性。

The results indicate that singularity of the CAE solution closer to the central with larger chirp and the CAS solution doesn 't present singularity with any chirp .

因此，窄带脉冲光束可以采用复振幅包络和复解析信号两种表示式来研究，而对于宽带脉冲光束，必须采用严格的复解析信号表示式。

It is concluded that both of the representations are applicable to study narrowband pulse , but for broadband pulse only rigorous complex analytical signal representation should be adopted .

推导了超短啁啾脉冲复宗量拉盖尔&高斯光束的复振幅包络解和复解析信号解。

Complex amplitude envelope ( CAE ) solution and complex analytical signal ( CAS ) solution of ultrashort pulses with spatial profiles of Elegant Laguerre-Gaussian transverse modes are derived .

本文采用三层地壳介质模型，讨论了地方台网记录的小近震三分向地震图S波段振幅包络形状问题。

In this paper , using a three layer model of the crustal media , the amplitude envelopes of S-waves of three component seismograms of small near earthquakes recorded by the local seismic network are studied .