有向无环图模型
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有向无环图版本模型 Directed acyclic graph version model
Directed acyclic graph model
以上为机器翻译结果，长、整句建议使用 人工翻译 。
针对化工系统模型难以确定的问题，提出了基于对象的有向无环图节点粒度的转换方法。
To solve the difficulty in modeling a chemical system a new node granularity transformation method based on object directed acyclic graph was proposed.
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