本文建立了具有阻尼项的高阶微分方程新的振动定理。
This paper obtains a new oscillation theorem of high-order differential equation with damping.
根据由李亚普诺夫定理导出的综合阻尼系数的原理，统一定义了同步发电机的动态阻尼力矩系数和动态同步力矩系数。
A unified definition for damping torque coefficient of synchronous machines is proposed in this paper according to the principle of synthetic damping coefficients deduced from the Lyapunov Theorem.
与原来的方程相比，它增加了一个非线性极强的阻尼项。我们同样用定理1．2介绍过的方法，证明了径向对称解的存在性。
We also use the method in Theorem 1.2 to prove that there exists a smooth 2-dimensional radical symmetric solution for this problem.
与原来的方程相比，它增加了一个非线性极强的阻尼项。我们同样用定理1．2介绍过的方法，证明了径向对称解的存在性。
We also use the method in Theorem 1.2 to prove that there exists a smooth 2-dimensional radical symmetric solution for this problem.
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