它被设计为健壮的，可理解的，可拓展的，模块化的和可维护的。
It was designed to be robust, understandable, extensible, modular and maintainable.
首先以PIFA天线为基本结构，设计了能通过控制二极管开关状态来改变方向图的可重构天线，并实现了天线带宽的拓展。
Based on the PIFA structure, a pattern reconfigurable antenna can be controlled by RF diode switch is designed, with bandwidth expanded at the same time.
应用可拓原理对传统的聚类分析方法做了拓展，并据此对航空备件集合进行了划分，为航空备件的分类管理提供了一种崭新的方法。
This paper also USES the extension theory to develop the traditional clustering analysis method. It offers an new scientific method for the classification management of aviation spares.
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