采用无条件稳定的精细逐步积分法求解结构的模态动力学微分方程，构造了通过结构的模态响应反求荷载列阵的迭代算法。
The highly precise direct integration scheme is used for solving modal dynamic differential equation of the structure nd a dynamic load identification method by the modal responses is proposed.
本文利用拓扑度理论研究三阶微分系统反周期解的存在性。
Using topological degree the existence of anti-periodic solutions for third order differential systems is studied.
为了实现一类非线性系统的鲁棒混沌反控制，提出非线性不确定系统鲁棒混沌反控制的非线性比例积分微分控制(NPID)方法。
In order to realize chaos robust anti-control of a class of nonlinear system with uncertainties, a nonlinear proportional integral differential (NPID) control method was put forward.
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