So the optimal control problem of discrete-time systems with time-delay becomes a wildly attentional research field in recent decades.

所以，时滞离散系统的最优控制问题近年来成为广受关注的研究领域。

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For uncertain discrete-Time-delay systems with both state and input delays, this paper addresses the problem of designing an guaranteed cost state feedback time-delay controller.

对一类同时具有状态时滞和输入时滞的不确定离散时滞系统，提出保性能状态时滞反馈控制律的设计问题。

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This paper deals with the design of guaranteed cost observers for a class of discrete-time switched systems with time-delay under arbitrary switching law.

对一类任意切换律下含有时滞的不确定离散切换系统，研究了其保性能观测器设计问题。

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