By Fouriertransform, we make an particular calculation on the formula of the multiple of the stretcher, and gain an integrity calculate formula.
采用傅立叶变换，对展宽倍数公式进行了详细的推导，得到一套完整的计算公式。
2
On the assumption that the hydraulic conductivity field follows a lognormal distribution, the direct Fouriertransform is introduced to generate multiple realizations of hydraulic conductivity field.
据以往研究，假设渗透系数场遵循对数正态分布，利用直接傅立叶变换方法来生成渗透系数随机场。
3
The theory of multiple input-output frequency response functions estimation is studied based on the finite Fouriertransform.