文章分析WFMC工作流参考模型的可扩展性，提出了一个可扩展的工作流元模型。
This paper analyzes the extensibility of the workflow reference model from WFMC, then presents a extensible workflow meta model.
设计给出了一个由过程元模型、组织元模型和数据元模型构成的三维工作流元模型。
A three-dimensional workflow meta-model is presented, which is composed ofprocess meta-model, organization meta-model and data meta-model.
对于不同种类的涡流发生器，扰流元的尺寸、排列方式、间隔距离等因素对污垢的形成具有不同的影响规律。
For the different kinds of vortex generators, some factors such as the sizes, arrangement mode, interval of disturbing flow unit has different influence rules to the fouling formation.
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