中文摘要：

针对两类树状输运网络——自然演化的克隆植物网络和人工建造的城市地铁网络，构建L空间和P空间下相应的网络模型，通过网络拓扑结构特征和随机树两个角度进行比对分析。研究发现，虽然这两类网络构建目的不同，但它们在L空间和P空间下都展现出相似的拓扑结构；同时将这两个网络的结构与随机分支树进行比较，发现它们以相同的方式和程度偏离随机分支树的预估值。

英文摘要：

his paper analyzed two types of empirical treelike transport network ： natural evolution clonal plant network and ar- tificial construction metro network. It constructed the models in space L and space P respectively. Although these two types of networks construction for different purposes, they exhibited similar topology in space L and space P models. Compared these two networks with random branching tree, it was found that they deviated from the predicted random branching tree in the same manner and extent.