应用此软件分析了简单链形悬挂、弹性链形悬挂以及双链形悬挂的振动特性，并进行了相互间的比较分析。
The dynamic performance of simple catenary, stitched simple catenary, and heavy compound catenary have been studied and compared by using this software.
提出简单多边形距离计算方法，在计算简单多边形最近距离的同时，可以求得多边形之间彼此面对的线段链。
A closest distance computation method for simple polygons has been presented in this paper, which can be used to get the line segments (one chain from each polygon) of polygons at the same time.
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