然后引入拓扑直和的概念，利用它和商空间给出一个归纳极限表示定理。
We introduce the notion of topological direct sum, and get a representative theorem of inductive limit by topological direct sum and quotient space.
使用现有的产品数据表达与交换标准STEP只能描述CAD模型几何、拓扑和部分运动学信息，对多刚体动力学特征的描述一直是特征模型中的一个空白。
But there are only basic info of geometry, topology and partial kinematics in the CAD model in STEP. The description on feature of multi-rigid-body dynamics is hardly blank.
由于它拥有大量的节点和复杂的拓扑结构。它的一致性维护工作一直存在自动化程度不高、效率低下等问题。
But because of large scale clusters are always consisted a lots of nodes with a complex architecture, the work consistency maintenance on them always are inefficient and bad-automatic by this time.
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