In 1990s based on the eigenfunction method of representation theory of groups , a new method , the symmetrized boson representation ( sbr ) method , was brought forward 90年代，陈金全等人在点群的表示理论上提出了一种新的方法，对称化玻色表象方法( sbr ) 。
2.
The focus of the paper is divided into two parts : the part one where the compact supported orthogonal wavelet about symmetry is discussed and a new method about symmetrizing wavelet is put 信号的采样从均匀采样到不规则采样是一个很大的进步，给以shannon为基础的信息论增添了新的一页。
3.
Because of the unique and complicated construction of the clock , every marble must be cut and polished by hand . meanwhile , in order to realize the perfectionism , the similar vein of every marble should be symmetrized 由于钟表产品结构的独特性，外结构石材必须手工完成打磨和部分切割工艺，保证每件产品的外观完美性。
