In the quiescent state, the next field of the link node pointed to by the tail is always null; in the intermediate state, it is always non-null. 在静止状态时,尾指针指向的链接节点的next字段总为null,而在中间状态时,这个字段为非null。
In addition, avoid returning objects that are null or in an invalid state. 此外,避免返回空对象或者状态无效的对象。
In this paper, a simple method for finding return difference matrix and null return difference matrix from state equations is presented. 本文从状态方程出发,推导出求零输入回归差矩阵及零输出回归差矩阵的简捷方法,并推导出二者的关系,以及它们与传递函数的关系。
The null vectors can not only reduce the switching losses by optimizing the switching state sequences but also compensate the neutral line current. 零矢量的作用也不再局限于减小开关损耗、优化开关序列,还可以用来补偿中线电流。