spectrum filtering

The soil in a sediment basin near ground surface is soft. It has a remarkable amplification and filtering effects on earthquake wave and can change the characters of the amplitude and spectrum of ground motion wave significantly.

大型沉积盆地中，近地表土层比较松软，对地震波有明显的放大和滤波的作用，可以显著改变地震动的幅值和频谱特征。

This approach bases on the cross power spectrum estimation and phase compensation filtering.

该方案基于互功率谱的相位检测、相位补偿滤波两种算法.

Based on the arc light spectrum theory, the auxiliary lighting source and composite filtering techniques were used to solve the negative factors such as poor resolution and radiation disturbance by weld pool.

依据弧光光谱理论，采用辅助光源及复合滤光技术，有效地解决了焊接区熔池成像的干扰和清晰度差等问题。

The time section with high resolution and S/ N ratio was obtained after the spectrum whitening and the inverse Q. filtering have been made.

采用谱白化、反Q滤波等手段进行资料处理，获得了分辨率和信噪比均较高的时间剖面。

The spectrum character of binomial coefficient filtering

二项式系数滤波的谱特征

After processed by narrow band com-plex filtering or narrow band recurrence filtering and Hilbert trans-formation, real signal is transformed into narrow band complex sig-nal, whose instantaneous spectrum is then used to solve for tensor impedance element.

本文通过对记录上的实信号做窄带复数滤波或窄带递归滤波和希尔伯特变换，转换成窄带复信号，再由复信号的瞬时谱求出张量阻抗元素。