In this paper, a direct method for static voltage collapse point in rectangle coordinate is presented.

本文提出了在直角坐标系下静态电压稳定临界点的一种直接计算方法。

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To do this, you first need to calculate the left-most coordinate of the rectangle, which is accomplished by the first three lines of code.

若要实现该操作，首先需要计算矩形最左边的坐标，这通过代码的前三行来实现。

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Left coordinate of checker rectangle origin (upper-left corner).

棋子矩形原点(左上角)的左方向坐标。

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