中文摘要：

在这份报纸，散布矩阵(DPSM ) 的一个修改直接产品方法被介绍，计算公式如下被导出：(z)=n1n !(Mz ) n (0 ) 并且(z+j )=n1n !(Mj ) n (z) ，在 M 是尺寸能被 Bethe 潜在的方法急速地并且因此减少的散布矩阵的地方，没有非常失去精确性，计算速度能极大地被增加。与 DPSM 方法计算的结果在对与 BW 方法计算的那些的几乎准确的同意。然而，为修改 DPSM 方法的计算速度为 BW 方法是比那快约三倍的。而且， DPSM 对没有要求对称，计算矩阵的所有类型合适或结合对称。

英文摘要：

In this paper, a modified direct product method of scattering matrix （DPSM） was presented and the cal- culation formulawas derived as follows： φ（z）=∑n1/n!（Mz）nφ（O）and φ（z＋εj）=∑n1/n!（Mεj）nφ（z）,whereM is the scattering matrix of which the dimension can be reduced by ＇Bethe potential method＇ drastically and therefore the calculation speed can be increased tremendously without losing accuracy very much. The results calculated with the DPSM method are in almost exact agreement with those calculated with BW method. However, the calculation speed for the modified DPSM method is approximately three times faster than that for the BW method. Furthermore, the DPSM is suitable for computing all types of ma- trices without requiring symmetry or conjugate symmetry.