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将Ｐｅｔｒｉ网方法引入工作流模型描述，并针对工作流的特点对其进行扩展，提出功能网描述方法。使用功能网可使工作流模型得到方便、快速、合理的构架，同时为工作流模型的仿真研究打下坚实的基础
The Petri net method is introduced into the description of the workflow model, and its characteristics are extended according to the characteristics of the workflow. The method of describing the functional network is proposed. The use of functional network can make the workflow model get a convenient, fast and reasonable framework, and lay a solid foundation for the simulation research of the workflow model