在设计阶段，通常将软件系统分解为类和子系统，并且根据这些元素来实现用例。

During the design phase, software systems are usually decomposed into classes and subsystems, and the use cases are realized in terms of these elements.

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在分析球磨机、分级机系统模型基础上，论文给出了磨矿分级过程的控制依据，并将整个磨矿系统分解为若干控制子系统。

The control method of grinding grade process is designed and the whole grinding system is treated as several control subsystems by analyzing of the model of mill and grader.

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首先，采用动态聚类方法，将整个系统分解为几个子系统。

First, the whole system was decomposed into several subsystems by adopting fuzzy k-means cluster.

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