城市公交网络阻抗函数模型

Model of Urban Public Transit Net Impedance Function

把时间、费用、交通流和城市节点影响通过参数标定建立起综合函数关系,避免了一般综合性路阻函数费用与时间相互转换过程中,需要时间价值参数这一难定量的指标.公交阻抗包括时间阻抗和费用阻抗,这两种阻抗的单位不同,本文借助数学方法,将这两种阻抗进行量纲的统一,然后采用数理统计的方法对阻抗中的参数进行标定.最后,将模型应用于具体的项目中证明模型可行.

The paper set up a comprehensive model considering time,cost,traffic flow and city nodes by parameter definition,which avoids the parameter-time difficult to be defined during the general transition between cost and time in road impedance function.Public transit impedance is composed by time impedance and cost impedance,the units of which are different.The paper applies a mathematical method to work out a dimension for the two impedances.Then impedance parameters are calibrated by statistical method.Finally,the model is applied to a project to testify its feasibility.