But tensor product wavelets has a number of drawbacks .

张量积小波有其自身的缺点。

When a puff of wind ruffles the surface , wavelets disturb the surface and the reflections disappear .

一阵风掠过水面，微波打乱了水面，倒影也不见了。

Small trees in leaf begin to sway ; crested wavelets form on inland waters .

有叶的小树摇摆，内陆的水面有微波。

In essence , we need a way to change scale at various points , and scale is at the heart of wavelets .

本质上，我们需要一种能在不同点上改变尺度的方法，而尺度就是小波的核心。

Feng xiangchu , male , born in 1962 , professor , ph.d. supervisor . His main research interests include image processing , the theory of pdes and its application , wavelets and its applications .

冯象初，男，1962年生，教授，博士生导师，主要研究方向为偏微分方程理论及其应用、小波理论及其在图像处理中的应用。