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采用复杂网络的研究方法,针对北京市公共汽车交通建立了公交线路、公交换乘和停靠站点复杂网络,利用这3个网络的几何量讨论了北京市公交网络的几何性质。利用实际数据计算的结果显示存在某些线路具有中转的作用,部分停靠站点具有中枢作用;民众出行平均需乘坐17.4站并换乘1.7次。研究结果还揭示了公交网络的点权分布具有不同于其他加权网络的点权分布的性质。
Using the research method of complex network, the bus network, bus transfer and the complex network of bus stops are established for the bus traffic in Beijing. The geometric properties of the bus network in Beijing are discussed with the geometric quantities of the three networks. The actual data shows that some of the lines have the function of transit and some of the stops have a central role. On average, people travel 17.4 times and transfer 1.7 times. The results also reveal that the distribution of point weights in public transportation networks has a different distribution of point weights than other weighted networks.