Firstly, asymptotically stable value range of the switching law is obtained based on the constraint condition of matrix pencil for the linear impulsive switched system.

首先根据系统矩阵束的约束条件，得到线性脉冲切换系统渐近稳定时切换律的取值范围。

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Strip harvesting will leave a "pencil thin" linear scar in the donor area, which is typically covered by a patient's hair even at relatively short lengths.

条带的获取将在供体区域留下铅笔一样大小的伤疤，这些伤疤能被患者很短的头发覆盖。

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