本文提出了对复变特征方程求根的一种系统逼近程序。

In this paper, a successive approximation procedure for calculating eigenvalues of the complex characteristic equation is proposed.

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通过对非线性方程求根牛顿迭代法的分析，给出牛顿迭代法的一种新的加速技巧，并通过数值算例验证所作的理论分析。数值结果表明该加速方法是行之有效的。

By analyzing the Newton iterative method for nonlinear equation, a new acceleration technique of Newton method is proposed. Numerical results indicate that the acceleration method is effective.

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针对线性定常闭环系统特征方程的求根问题，提出了一种基于演化算法的实因式分解法。

A real factorization method based on evolutionary algorithms is proposed for finding tbe roots of the characteristic equation of a linear time-invariant closed-loop system.

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Looking for the root of this equation.

也就是求这个方程式的根。

麻省理工公开课 - 计算机科学及编程导论课程节选