Wavelet theory is a new developing branch in mathematics appeared in the 1980’s. In recent years, it is considered as an important breakthrough in methods and tools. And it has been employed in various fields of science and technology and engineering calculation. Especially, Daubechies wavelet has been used the most widely and has the most far-reaching influence because it has obvious superiority in solving some odd state problems, for example, high stress gradient. Wavelet Ritz, wavelet Galerkin and...