使用维纳分布进行瞬时频率估计用来校正电离层非线性相位污染带来的频带展宽-High-frequency (HF) sky-wave radar signals propagate to and from the target by means of the ionosphere. The difficulty in obtaining very narrow beamwidths at HF, and the long ranges involved, mean that the

地震反应谱计算，位移反应谱，速度反应谱，加速度反应谱-Earthquake response spectrum calculation, displacement response spectrum, velocity response spectrum, the acceleration response spectrum