1) time varied spectrum
时变频谱
1.
Speech signal spectrum analysis is the time varied spectrum analysis.
针对语音信号频谱分析实际上是时变频谱分析的特性 ,详细地讨论了用 FFT技术对语音进行频谱分析过程中的方法问
2) variance coefficients of instantaneous frequency of Hilbert spectra
Hilbert谱瞬时频率变异系数
1.
The non-stationary characteristic of frequency content of near-fault ground motions is remarkable,and the variance coefficients of instantaneous frequency of Hilbert spectra can reflect well the non-stationary property and degree of ground motions.
近断层地震动的频率非平稳特征显著,Hilbert谱瞬时频率变异系数良好地反映了地震动的频率非平稳性质和程度。
3) frequency spectrun aging
频谱时效
4) Long-time spectrum
长时频谱
6) joint time-frequency spectrum
时频谱图
1.
In this paper,according to the characteristic of seismic signal s noise,one estimation method of seismic signal s first arrival based on triple correlation of joint time-frequency spectrum is introduced,and the results of experiment and conclusion are presented.
本文通过对地震信号噪声特性的分析,研究了基于联合时频谱图三重相关的地震信号初至的估计方法,并给出了实验结果和结论。
补充资料：时变
1.四时季节的变化。 2.时世的变化。亦指时世变化的规律。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条