almost periodic time-varying MA system 几乎周期时变MA系统
periodic time varying system 周期时变系统
periodic time-varying feedback 周期时变反馈
periodic time-varying coefficient 时变系数
linear periodic time-varying system 线性周期时变系统
almost periodic time-varying ma systems 几乎周期时变ma系统
linear time-varying periodic systems 线性时变周期系统
time-varying periodic signal 时变周期信号
Because of the meshing stiffness of a gear pair, the governing equation denotes a linear dynamic system with periodic time-varying coefficient.
由于齿轮副啮合刚度的影响，动力学方程序代表了一个具有时变系数的线性动力系统。
By the discretization of spatial variable in the equation, a third-order differential system of equations containing periodic time-varying coefficient is derived.
采用微分求积法对方程中的空间变量进行离散，得到仅含有时间变量的三阶周期系数微分方程组。
Xiaoming SU, Qingling Zhang, Periodic Time Varying Descriptor Systems, Science Press, 2006.
苏晓明，张庆灵，广义周期时变系统，科学出版社，2006。
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