一种基于Petri网原理的数据流模型研究

数据是系统信息资源的主要表现形式，在信息系统的系统设计和系统分析过程中，数据流建模是一个不可缺少的核心环节。从分析数据资源的特点出发，重点介绍了一种基于Petri网原理的新型的数据流程建模方法——数据流Petri网（DSPN），给出了数据流Petri网模型的形式化定义和图形表示，并以求解裴波那契数列第n项数值为例，详细说明了数据流Petri网模型在数据流程建模上的表达能力和建模特点。

Research on Dataflow Modeling with Petri Net

The dataflow modeling is indispensable in the process of information system designing and analyzing.Based on the data characteristic analyzing,a new method for dataflow modeling named DSPN was expounded particularly and the formalization and schema of the DSPN method were defined in detail.The speciality and ability of the DSPN were expanded with an example of getting the value of the fifth item of the Fibonacci numbers series.