顶向

The core functions of the system were designed by top-down flow in VHDL, on the ground of defining the system frame in reason. The simulation and testing of the system including the multiplexing and demultiplexing functions were accomplished on 25 million-gate FPGA. The realizability of this project has been proved.

在合理定义的系统帧结构基础上，采用VHDL硬体描述语言和自顶向下的设计流程，完成了系统的核心逻辑设计，并用25万门FPGA进行了仿真和测试，证明该方案是可行的。

A pure top-down recognizer will execute many CALLS and RETURNS, and these are slower than pure jumps

纯自顶向下识别程序将要执行很多CALL和RETURN，但这两个动作要比纯转移慢得多。

The proposed parameterized model was applied to two domain representative components, in which one is dynamic system and the other is static one. The results showed that both these two cases can be described with this four-level model from top to down, which shows the good extensibility and universality of this modeling method.

利用该模型分别对2种典型的动态和静态可重构系统进行了描述，应用结果表明，系统的结构特征均可通过自顶向下4层结构描述清楚，体现了模型良好的扩展性和通用性。

By introducing a new concept-Motion Characteristic Transformation Matrix , this thesis presents a top-down solving method to decompose the complex requirement into several simpler ones by sophisticated matrix operation, row and column shifting and velocity character expanding strategy.

作者提出运动特性变换矩阵，将运动类型、运动轴线以及速度特性等三个运动求解过程中所需的运动特性有机地集成于一体，并通过矩阵的行列变换以及基于规则的速度特性扩展策略，将复杂运动需求分解为简单的运动需求后进行求解，从而实现了自顶向下的复杂运动需求的求解。

In application, this system has been used to process a large numbers of page images, and has shown efficient and satisfiable performance.

本系统采用了自顶向下方法与自底向上方法相结合、自动处理与人工修正相结合的设计思想。

It is proposed that a top-down parsing algorithm with a chart structure is integrated with a semantical database. The semantical database is obtained while the syntax ingredient is analyzed by this method.

提出了图结构自顶向下分析算法同数据库语义相结合的方法，以此来完成句子结构的分析和句法成分数据库语义的获得。

The second mission of the dissertation is to prosecute the design of superscalar DSP processor.

论文采用自顶向下的正向设计方法，完成了NDSP25芯片核微体系结构设计，全部电路实现与可测性设计工作。

This text passes and analyses network technology characteristic and the general demand for campus network at present and practical application, it accords with systematic model of campus network of the network application demand in the campus at present to probe into, have used "top-down design philosophy " in networking, have discussed that tightens mode, all netted modes, some netted structure modes, the third layer of network technologies of exchanging the mode, wait a moment to three swapper, division and some key equipment and development of application system of VLAN odd key technology problems go on research.

本文通过分析网络技术特点和目前校园网的普遍需求及实际应用，探讨符合目前校园网络应用需求的校园网系统模型，在网络建设中运用了"自顶向下"的设计思想，讨论了紧缩模式、全网状模式、部分网状结构模式、第三层交换模式的网络技术，对三层交换技术、VLAN的划分及一些关键设备和应用系统的开发等等几个关键技术问题进行了研究。

The simulation shows that the major impact factor on storm surge is the change of the area due to reclamation. The factor of elevated topography due to reclamation is minor. After the reclamation, the extreme high level of storm surge is increased by 1.85~0.09m, decreasing from tail to mouth in Hangzhou Bay. After the planned reclamation, storm surge increases as a whole. The increased peak value is 0.25m at the center of Hangzhou Bay.

结果表明，围涂引起的平面边界改变是影响杭州湾风暴潮的主要因素，围涂引起的地形抬升的影响是次要因素；已有围涂使杭州湾极端风暴高潮位抬升1.85~0.09m，抬升幅度由湾顶向湾口递减；规划围涂后，杭州湾风暴高潮位总体抬升，抬升值最大的湾中部为0.25m。

The top-down design method is used as the main design way of this problem.

在设计方法上，本课题采用了自顶向下的设计方法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。