You can switch variable density OFF to allow any swings in the solution to stabilize, and then restart the analysis.
可以关闭易变的密度使求解稳定，然后重启分析。
System's analog variable, switch variable collect unit and switch variable output unit can monitor and control some equipment, such as air-condition, ventilator and fire alarm equipment.
系统的模拟量及开关量采集单元和开关量输出单元可以监控空调、通风机、火警等装置。
Defining a variable here makes it easy to switch to another data source.
在这里定义一个变量会使切换到另一数据源变得容易一些。
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