RUP describes a model as an abstract representation or simulation of a system that provides a complete description of the system from a particular perspective.

RUP将模型定义为系统的抽象表示或模拟，可从特定的角度提供对系统的完整描述。

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At last, this thesis realizes digital down converter based on FPGA, and the whole designing process includes algorithm simulation, VHDL description, FPGA simulation and real system test.

最后，基于FPGA对数字下变频进行了设计及实现，具体包括：算法仿真、VHDL描述、FPGA仿真和实际系统测试。

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Simulation scenario supports the conversion methods and the rules used for description from true world to notion model for the efficiency simulation of military application system.

仿真想定为军事应用系统的效能仿真供提了从真实世界到概念模型的转化方法和描述规范。

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