通过划分机组的约束限制条件为安全运行区和非安全运行区，提出了一种基于开关控制策略的厂内经济运行模型。

Through division of constraint conditions of units into security operation zone and non-security operation zone, a new model for internal economic operation is proposed.

youdao

在道路的养护维修期间，高速公路作业区由于经常需要关闭车道而形成道路通行的瓶颈，影响着高速公路运行的平稳性和安全性。

Because expressway work zones for maintenance often need lane closure, it will result in road capacity bottleneck and impact the stabilization and safety of expressway operation.

youdao

做好处在多雷暴区机场导航台的雷电防护，是确保导航台设备运行正常，保障飞行安全的重要一环。

So it is very important for us to protect the thunder and lightning in the navigating station of airport, which can make the equipments circulate normally and insure the safety of flying.

youdao