The coefficient matrix is stored by row storage. Column storage address is also provided. Rapid storage of coefficient matrix in finite element method is then realized.
系数阵采用行存储，同时提供按列寻址的地址，实现有限元系数矩阵的快速存储。
2
Besides, they decrease rapidly with the increase of tube bundle rows. When the row number amount to 8 or more, the resistance coefficient does not change any more.