振幅谱 meaning in English
amplitude ectrum
amplitude spectrum
spectral amplitude
Examples
- Amplitude spectrum shaping
振幅谱整形 - Used fourier transforming the nuclear logs , its vertical resolution can be achieved from analyzing the changes of amplitude spectrum slope
摘要对核测井曲线进行付氏变换，其纵向分辨率可以从分析振幅谱斜率变化中获得。 - Since it is hard to choose time window in practice and analyze the error quantitatively , there are usually deviations in the evaluation of amplitude spectrum
由于在实际运用中，以傅里叶变换相关的算法的时窗问题，难以选择好时窗长度，而且无法定量分析时窗长度产生的偏差，因而会使振幅谱的估算产生偏差。 - The algorithm used in the past was usually based on fourier transform , but there are clearly limitations in the method , because the seismic amplitude spectrum that it evaluated is the function of time windows
如果所选时窗过短，振幅谱会与变换窗函数褶积，失去频率的局部化特徵，而且过短的时窗会使子波的旁瓣呈现为单一反射的假像。 - 2 ) fourier amplitude spectrum analysis : ( 1 ) the fourier amplitude spectra decrease with the increment of depth ; and the components of fourier spectrum become complex in near - surface . ( 2 ) the fourier amplitude decrease faster in shallow soil level , and smaller in deep soil level . ( 3 ) compared with the deepest bedrock fourier spectrum , spectral components of higher than 5 hz decrease with depth decrease
2 .地震动傅立叶振幅谱沿深度的变化规律( d随着深度的增大，傅氏谱振幅逐渐减小;越接近地表傅氏谱的频谱成份越多，形状越复杂;傅氏谱振幅值在浅层沿深度的下降梯度较大，在深层下降较小; “土层/基岩”场地的基岩内_匕下两测点的地震动频谱沿深度几乎不变，傅氏谱十分相似; d基岩以上的土层测点，高于shz的高频成分减少。