performance: n.1.执行，实行，履行；完成；实现；偿还。2.行为，动作，行动；工作。3.性能；特性。4.功绩；成绩。5.演奏；弹奏；演出；(驯兽等的)表演；把戏。6.【物理学】演绩。短语和例子a performance test 【机械工程】性能试验。 high performance 高度准确，性能优良。 an afternoon performance 午后的演出，日戏。 two
An upper bound of the closed loop performance statistic given by the index of quadratic performance is found for all admissible parameter uncertainties . the poles of the closed loop systems is described by the delta operator models in the specified stable region of the complex plane which makes the poles in the specified region when the sampling period is becoming shorter 采用线性矩阵不等式处理方法及李亚普诺夫二次稳定性理论，分析、证明了极点约束控制的存在条件，并利用lmi方法把delta算子系统的极点配置在一个稳定的区域内，解决了delta域内的极点配置问题，使得期望的极点始终在这个稳定的区域内。
