You can use a single source by using a combination of command-line tools and shell flowcontrol (such as if or case) to select the various options to use.
通过使用命令行工具和外壳流控制(如if或case)的组合，您可以使用单个源来选择各种要使用的选项。
2
This method is of great importance to realize on-line modeling and control of freeway traffic flow.
此方法对实现高速公路交通流的在线建模与控制具有重要意义。
3
This paper studies the simulation method of tie line power flowcontrol among areas of an interconnected network in load flow calculation.