The model describing system is restricted to be acyclic at a cost.

作为代价，描写系统的模型限制是无环的。

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It also discussed the definition of features, group of characteristic profiles and the data structures of the describing system.

还讨论了特征的定义、特征形面的分类以及零件信息描述体系的数据结构。

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This thesis makes a systematic study on the discrete method describing system models and adopts the form of automaton to construct system models.

系统地研究了系统模型的离散化描述方法，采用有限状态自主机方式来建立系统模型。

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They fit the vision famously laid out by Vannevar Bush in a 1945 Atlantic Monthly article describing his Memex system.

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Mr Hammond told MPs that there was a possibility of a roll-out of a heated third rail system, describing it as "particularly vulnerable".

BBC: Transport Committee

During a Lords debate on higher education on 27 October 2010, Lady Morris voiced concerns about student choice being allowed to "drive the system", describing it as an "imperfect lever".

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