摘要
直接使用FFT由数字地震记录来恢复地面位移可能产生包括虚假的长周期分量在内的不正确结果.本文介绍了根据FFT和现代控制论所建立起来的迭代方法.对FFT和所介绍的迭代方法所给出的恢复结果进行比较表明,本文所提出的方法确实改善了地面位移的估计.
It is possible to yield incorrect results including false long period components, during the restitution of the ground displacement from digital seismograms directly using FFT. An iteration technique based on FFT and modern control engineering is presented. Comparing the recovered results of FFT with the displacement obtained by the iteration method shows that the approach proposed in this paper indeed improves the estimation of the ground displacement.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第1期37-43,共7页
Chinese Journal of Geophysics
基金
地震科学联合基金
关键词
地面
位移
地震
记录
数字
FFT
Displacement
Digital seismogram
Transfer function
FFT
Modern con-trol engineering.
