Compared with some normal methods of searching feedback loops, the author obtained that the matrix algorithm was superior to the determinant algorithm in terms of time complexity.
针对这一问题，比较了几种常见的反馈环计算方法，得出在时间复杂度上矩阵算法优于行列式算法。
2
The precise critical force of a system can be deduced from the fact that the determinantof stiffness matrix of the system is equal to zero in the critical condition.
由结构刚度矩阵行列式值为零的失稳条件导出结构失稳特征方程，从而精确地确定系统临界力值。
3
We put block matrix method in the calculation of Higher-order determinant in this article and give some calculating formulas, methods of calculation, condition of calculation and skills.