运用结构化模型方法，建立了影响城市轨道交通线网规模因素的多级递阶结构图。
The hierarchy figure of factors, which affected urban railway transit network scale, was established by the structure model method in system engineering.
分析影响城市轨道交通线网总体规模的因素，建立了各影响因素的多级递阶结构模型和计算城市轨道交通线网总体规模的数学模型。
The factors which affected total scale of URT were analyzed. Hierarchy model of affected factors and model of computing total scale of URT were constructed.
分析影响城市轨道交通线网总体规模的因素，建立了各影响因素的多级递阶结构模型和计算城市轨道交通线网总体规模的数学模型。
The factors which affected total scale of URT were analyzed. Hierarchy model of affected factors and model of computing total scale of URT were constructed.
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