Making use of the properties and the characterofclassification at each level on the hierarchical graph, the multi branched tree of the hierarchical graph is set up.
利用这些性质和模糊聚类谱系图逐层分类的特征，建立起模糊聚类谱系图的多叉树。
2
Detailedly introduces definition classification and characterof interfacial polycondensation and influential factors of polycondensate molecular weight.
并着重介绍了界面缩聚的定义、分类、特点以及影响缩聚物分子量的因素。
3
This paper mainly describes the concepts, character, classification, principle and the status of research and application of wetland wastewater treatment technology.