At the theoretical end, this focus manifests itself in complexity theory, which groups algorithms according to their time and space requirements for execution.

除理论之外，这种专注表现在本身复杂性的理论，它根据它们运行的时间和空间需求来组织算法。

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At the same time, it applies process controlling theory to engineering execution phase to control the items of B. Q, and discourses visa and claiming for compensation management.

同时，在工程实施阶段，运用过程控制原理控制各清单子目的完成情况，并对现场签证及索赔管理进行了论述。

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