The previous articles in this series also showed some simple Python examples that manipulated variables that held data of these four types.
该系列的前4篇文章也展示了一些简单的Python例子，这些例子管理保存有这四种类型的数据的变量。
In this paper, the problem of selection of manipulated variables and measurement variables for complex industrial process is discussed.
本文讨论复杂工业过程控制系统中操作变量与量测变量的选择问题。
Activities and their flows are the main abstractions and the data manipulated by the processes is essentially hidden in process variables.
活动和活动流是主要的抽象，由过程维护的数据实际上隐藏在过程变量中。
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