Synthesis method of non-stationary ground motion based on random Fourier spectra 基于随机Fourier谱的地震动合成研究
Finally, the spectral variation characteristics of ground and sub-ground motions with depth is investigated by comparing the response spectra and Fourier spectra. 另外,傅里叶谱也是本文分析的一部分,通过对不同深度地下地震动的反应谱和傅氏谱的比较,得到了一些较有意义的结论,以供工程参考。
The characteristics of the Fourier spectra of the same series of earthquake are exactly alike. 同一序列地震谱曲线特征极为相似。(4)一层穿斗木架房屋结构对地面脉动频谱特性没有影响;
Fourier spectra of 120 short coding sequences ( < 1 200 bp ) show that not all coding sequences are characterized by 3 base periodicity. 对120个较短编码序列(<1200bp)的Fourier频谱进行分析表明,3碱基周期性在短编码序列中并不是绝对存在的。
If all pictures are characterized by similar Fourier spectra, which have different scales, the optical fractal pattern can be obtained in the output plane. 如果所有的图像具有相同的傅里叶光谱特征,而这些光谱却具有着不同的尺度,在输出平面上便可获得分形图像。