The system is set by means of analysing the network of ventilation of multi - air machines and of using the available VNETPC analogue program.

经过对多风机通风网络分析，利用现有的VNETPC模拟程序，建立了多风机风压优化计算机调节系统。

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After that the approach of automatically generating the fault dictionary is discussed, and a general diagnosis program for analogue circuits has been written to implement these techniques.

在此基础上，讨论了字典法的自动实现方法，编制了通用模拟电路直流故障诊断软件。

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We have designed the main structure of PLC program and its sub-programs, then, introduced the programming of analogue variables and at last assigned the address of variables.

论文对PLC程序进行了总体结构设计，并以此为指导进行了主程序和各子程序的设计，并对模拟量的编程进行了说明，另外，还对PLC程序变量地址进行了分配。

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