We have already stated that our main concern will be the study of systems for which linear, time-invariant differential equations provide a useful model.
前已指出：我们主要关心的是用线性、时不变微分方程作为实用的模型系统。
2
A stairs model approximation for stable linear time-invariant system is given in this Paper.
本文对稳定的线性时不变系统提出了一种阶梯模型近似。
3
The linear timeinvariant equivalent circuit model is established by introducing the PARK transformation to the space vector modulated matrix converter.