The state evolution of low-level controlled plant conduces to event occurrence, whenever high-level discrete event system controller issues corresponding control commands and makes decision.

下层受控对象的状态演化导致事件的发生，并由上层的离散事件系统控制器做出监督决策，发出相应的控制命令。

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Discrete event systems are one of the frontiers of research in the control system theory and a new branch in the field, to which increasing attention has been paid.

离散事件系统作为系统与控制理论的一个新兴分支和前沿方向，其研究日益受到人们的重视。

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Discrete event system comes from the background rising from computer operating system to the control of complex, diverse process model.

离散事件系统是从计算机操作系统到复杂多样模型进程的控制这众多背景下产生的。

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