Finally, in the restaurant management system designed on the basis of key module is the design and realization.

最后，在餐饮管理系统设计的基础上，给出关键模块的设计与实现。

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An alarm system for security guarding designed with FPGA is discussed in this thesis, and the theory and structure as wall as the design for VHDL module are also given bellow.

文中讨论利用FPGA设计的用于安全防范的报警系统，讲述系统的原理与结构，给出VHDL的模块设计。

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When a database encryption system is designed, the design of key-managing module is a very difficult problem and must be solved firstly.

密钥管理方案的设计是数据库加密系统设计时必须首先解决的一个难题。

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