求翻译：Zihui Xia等通过分析球囊扩张式支架的一个重复结构单元比较了不同连接形式的三种支架在扩张过程中发生的变化，提出了小单元分析方法的优势。是什么意思？

Zihui Xia and other analysis of balloon-expandable stent through a comparison of repeating structural units connected in the form of three different stents in the expansion process changes, made a small element analysis method has the advantage.

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Zihui Xia and so on has compared the different connection form three kind of supports through an analysis ball pouch expansion type support redundant structural unit the change which occurs in the expansion process, proposed the small unit analysis method superiority.

Zihui Xia, Balloon dilatation by analyzing a repeating structural units of the type support in the different connections of the three supports changes that have taken place during the expansion process, raised a small unit of analysis method of advantage.

Zihui Xia,etc. is through analyzing first repeated structural Unitting of the sacculus expanding support has compared differently that joins the change that three kinds of supports in the form take place in the course of expanding, have proposed the advantage of the analytical method of the small un