该文分析了低压电力线信道特性，利用信道慢时变的特点提出一种适合于电力线信道的判决反馈信道估计方法。

The low-voltage power line channel properties are analyzed in this paper and a decision feedback channel estimation method is proposed on condition of slow time-variant of channel.

youdao

摘要：针对高速公路交通系统的非线性、时变特性，设计了一种模糊自适应控制器，并将其应用于高速公路匝道控制系统。

Abstract: Aiming at the nonlinear and time-varying characteristics of freeway traffic system, a fuzzy self-adaptive PID controller is designed and applied to freeway ramp metering in this paper.

youdao

对于调峰机组，当负荷变化时机组的过程模型甚至结构参数都具有明显的快时变特性。

For peak load unit, its process model and structure parameters have obviously fast time-varying characteristic while load changing.

youdao