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.
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.
在分析电动机传统的反时限过负荷保护的基础上，提出一种基于解微分方程的过负荷保护新方案。
After analyzing the conventional time-inverse overload protection of the motor, the paper presents a new thermal overload protection scheme basing on the solution of a differential equation.
在分析电动机传统的反时限过负荷保护的基础上，提出一种基于解微分方程的过负荷保护新方案。
After analyzing the conventional time-inverse overload protection of the motor, the paper presents a new thermal overload protection scheme basing on the solution of a differential equation.
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