A new channel-selecting control method in which keyboard is scanned by hardware circuit for searching the closed key is presented.

提出了一种采用硬件电路扫描键盘，搜索闭合的按键开关，实现通道选择控制的新方法。

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Based on the slope fault model, this paper presents a fault dictionary method for soft fault diagnosis of modular analog circuit based on closed-loop operational amplifier (CLOA).

基于斜率故障模型，提出了一种诊断模拟电路中基于闭环集成运算放大器的模块级软故障的字典法。

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The common characteristic features of this method is to deal with the working conditions of the designed maximum discharge of closed circuit and then to determine the pipe diameters and water head.

方法的共同特点是先找出管网输配最大流量的工况，然后确定管径及水压。

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