The design and analysis method of UML can enhance greatly reuse, transplanting, expansion and defence of software.

采用UML设计分析方法，可大大提高软件的复用性、可移植性、可扩展性和可维护性。

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According to modularization designs for open NC system, one kind of hardware design and analysis method is introduced, which bases on DSP and CPLD to develop the motion controller.

针对开放式数控系统体系模块化设计问题，介绍了一种基于DSP和CPLD的运动控制器的硬件设计和分析方法。

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So, it's very necessary to deeply research the principle of phase-locked system, capture the design and analysis method, set up IP library and afford ready design block for system.

因此，对锁相环进行较深入的研究，掌握其设计和分析方法，并完善IP库，为系统设计提供单元模块，是非常有必要的。

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