On the analysis of the principle of ultrasonic distance measurement based on, given the realization of ultrasonic reversing radar system hardware design circuit diagram and software design flow chart.
在分析超声波测距原理的基础上，给出了实现超声波倒车雷达系统的硬件设计电路图和软件设计流程图。
Based on the project of train Management Information System with Wuchang Railroad Department, it was analysis operation and flow chart of succor train in details.
分析列车救援工作业务流程，提出列车救援信息系统建设总体目标。
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