topdown

By simulating the switch unit , it can be seen that ATM switch unit that is designed by use of hierarchical design of topdown with VHDL can perform the basic function of cell head changing , routing and queuing .

本文通过对所设计的基于VHDL描述的ATM交换单元进行仿真验证可以得出如下结论：采用自顶向下的层次化设计、由VHDL描述的ATM交换单元能够实现信头变换、选路和排队三项基本功能；

As an engineering example , an analysis of each stage of the design flow was conducted for the cockpit canopy of airplane in the CATIA V5 virtual assemble environment , with emphasis placed upon the assembly-oriented and topdown design philosophy in the design process .

结合在CatiaV5平台虚拟装配环境下的工程设计实例，强调在设计过程中体现面向装配设计和自顶向下的设计思想，对设计流程的各个阶段进行了分析。

Design and Construction of the Joint Node Used in the Deep Foundation by Topdown Construction Method

高层建筑深基础逆作法施工中的节点处理

The Application of Pro / E Topdown Method in Designing a Numerical Control Engraving Machine

Pro/E的TOPDOWN技术在数控雕刻机设计的应用

The topdown approach introduces synthetic qualitative indexes . Hereon , latitude location and traffic situations are adopted .

自上而下途径采用综合定性指标（在此选择纬度和交通位置）。

Exercise own judgment at all time and speak up when he / she feels the topdown decisions that jeopardize the overall interest of the Company .

当他／认为管理层的决策有危害公司整体利益时，能运用自己的判断处理及向上级反映。

On analysis of the principle and application mode of DES , a DES module which fits for embedded security system such as IC card is realized by topdown design methods .

在详细分析DES的基本原理和应用模式的基础上，结合DES硬件实现的特点，采用正向设计的方法实现了适用于IC卡等有嵌入式安全需要的系统中的DES模块。

Taking advantage of the development tool of VHDL and the development environment of MAX + PLUS ⅱ, taking several characteristic chips for example , this paper use behavioural description of VHDL adapting to international industry standard , and redesign the chips by topdown methodology .

以VHDL为开发工具，以MAX+PLUS为开发环境，以几个典型芯片为例，采用符合国际工业标准的VHDL语言的行为级描述方法，以自上而下的方式重新设计了芯片。