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-  2018 

公共交通网络的复杂性及其优化――以宝鸡市为例
Complexity and optimization of public transit network: Taking Baoji for example

Keywords: 交通工程,城市交通,静态特性,优化,复杂网络
traffic engineering
,public transit network,static characteristic,optimization,complex network

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Abstract:

为了减缓城市交通拥堵,改变城市公交线路规划不合理的状况,采用复杂网络的分析方法研究城市公交系统,构建公交网络模型,分析公交站点中心性、公交路段中心性、公交网络聚类特性、小世界性、集团特性和抗毁性等重要指标。以宝鸡市公交网络为例,基于Space L方法构建宝鸡市公交网络模型,用节点度和节点介数衡量站点的重要性,用边介数衡量公交路段的重要性,用聚类系数、最短路径衡量公交网络的复杂网络特性,采用GN算法对公交网络进行了社团划分。采用随机和突发2种策略对网络进行了攻击,验证公交网络的鲁棒性。研究结果表明:宝鸡市公交站点网络和大多数公交网络一样具有幂律分布特性,该网络可划分为11个明显的社团;该网络对于随机攻击具有较好的鲁棒性,对于基于度的蓄意攻击具有较大的脆弱性,和全国大中城市相比,宝鸡市公交网络的集团化程度较低。据此提出优化公交网络的方法,对关键站点实行分流,对关键路段实行绕行,根据社团划分和网络整体结构优化公交路网,建设智能公交系统,规划城市建设,研究结果可为宝鸡市交通线路规划和城市建设提供理论依据。
In order to reduce the urban traffic congestion and change the unreasonable situation of urban public transit route planning, the urban public transit system was studied with the method of complex network, and the public transit network was constructed, the important parameters such as the centrality of bus station, the centrality of bus section, the clustering characteristic of bus network, the small world, the group characteristic and the destructiveness were studied, take Baoji public transit network as an example. Public transit network model of Baoji was constructed based on Space L method, the degree and betweenness of nodes were used to measure the importance of the bus stations, the betweenness of edges were used to measure the importance of the bus routes, and the clustering coefficient and the shortest path were used to measure the complexity of the public transit network. The community structure of public transit network was detected by GN algorithm. The robustness of public transit network was verified,when the network was attacked by two strategies such as random attack strategy and burst attack strategy. The results show that Baoji public transit network has the same power??law as public transit networks, which can be divided into 11 distinct community structures. The network is robust to random attacks and vulnerable to deliberate attacks based on degree. Compared with large and medium??sized cities in China, the collectivization degree of Baoji public transit network is relatively low. The methods of optimizing Baoji public transit network are proposed, such as dividing the key stations , detouring the key sections, according to the community division and the overall network structure, the road network is optimized, the intelligent bus system is constructed and the urban construction is planned. It can provide theoretical basis for traffic line planning and urban construction in Baoji City. 6 tabs, 7 figs, 25 refs.?

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