一种基于开源软件的OD反推求解算法  

An OD estimation algorithm based on the open-source package

作　　者：郑志鹏[1] 卢守峰[1] 王杰[1] 

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410004

出　　处：《交通科学与工程》2015年第1期98-102,共5页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(71071024);湖南省自然科学基金项目(12jj2025);长沙市科技局重点项目(k1106004-11)

摘　　要：针对开源的中观交通分配软件NEXTA-DTALite中OD反推模型求解方法的不足,对NEXTA-DTALite软件OD矩阵反推模型进行变换,构建新的目标函数,使用开源的线性规划软件GLPK进行求解。利用开源数据格式文件CSV文件的通用读取和输出的特点,实现两个软件在数据交换方面达到无缝衔接。提出了利用NEXTA-DTALite和GLPK进行OD反推模型求解的算法步骤,解决了NEXTA软件中利用Excel求解遇到的维数爆炸问题,同时提高了NEXTA-DTALite软件中OD反推模块的开源程度。In order to deal with the deficiency problem in solving the open-source,mesoscopic dynamic traffic assignment package NEXTA-DTALite＇s OD-estimation model is used.A conversion of the OD matrix estimation model to construct a new objectiv function is proposed.Then open-source linear programming program GLPK is used to solve OD estimation model.By using the open-source characteristic of CSV file format of reading and writing,NEXTA-DTALite and CLPK of seamless data exchange are integrated.The OD-estimation algorithm is proposed by the combination of NEXTA-DTALite and GLPK to solve the dimension explosion problem.The method also enhances the opensoure domain of the NEXTA-DTALite package in solving the OD-estimation model.

关 键 词：开源 NEXTA-DTALite软件 OD反推 GLPK软件 算法 

分 类 号：U416.2[交通运输工程—道路与铁道工程] O346.1[理学—固体力学]