本文讨论在给定时间区间内线性系统的最佳观察问题。
In this paper, we discuss the best observation problems of linear system in time interval given.
最佳摄动法是一种基于小参量的系统辨识方法，特别适用于非线性系统。
An optimum perturbation method based on small variables is suitable for nonlinear systems.
大型火电单元机组是一个多变量、强耦合、大时滞的非线性系统，用传统的控制方法很难得到最佳的运行效果。
It is difficult to set up the exactly mathematic model and it is a challenge for the design of the power unit control system.
大型火电单元机组是一个多变量、强耦合、大时滞的非线性系统，用传统的控制方法很难得到最佳的运行效果。
It is difficult to set up the exactly mathematic model and it is a challenge for the design of the power unit control system.
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