Based on the numerical solution of Saint Venant Equations and proportional control mode, the author established a computer program for simulating automatic upstream control irrigation canal system.
作者通过圣维南方程组的有限差分数值解并使用比例控制方式，编写出计算机程序，实现了自动上游控制灌溉渠道系统的计算机模拟。
Nc automatic program is a mainstream of the programming approach in the current numerical control process, and it has a series of merit such as quick speed, short period, high quality and convenience.
数控自动编程是当前数控加工中编程方法的主流，它具有编程速度快、周期短、质量高、使用方便等一系列优点。
Used for brake beam of railway vehicle, the automatic welder, the numerical control system of which is based on the DSP motion control card, has been introduced with details of the key technology.
介绍了以DSP运动控制卡作为控制系统核心的货车制动梁自动焊接机，详细论述了自动焊接机的关键技术。
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