sustainability Article Analysis of Network Structure of Urban Bike-Sharing System: A Case Study Based on Real-Time Data of a Public Bicycle System Yi Yao 1, Yifang Zhang 1,*, Lixin Tian 1, Nianxing Zhou 2, Zhilin Li 3 and Minggang Wang 1,4 1 School of Mathematical Sciences, Nanjing Normal University, Nanjing 210023, China;
[email protected] (Y.Y.);
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[email protected] (M.W.) 2 School of Geography, Nanjing Normal University, Nanjing 210023, China;
[email protected] 3 Department of Mathematics, North Carolina State University, NC 27695, USA;
[email protected] 4 Department of Mathematics, Nanjing Normal University Taizhou College, Taizhou 225300, China * Correspondence:
[email protected] Received: 12 July 2019; Accepted: 27 September 2019; Published: 30 September 2019 Abstract: To better understand the characteristics of a bike-sharing system, we applied complex network methods to analyze the relationship between stations within the bike-sharing system. Firstly, using Gephi software, we constructed the public bicycle networks of different urban areas based on the real-time data of the Nanjing public bicycle system. Secondly, we analyzed and compared degree, strength, radiation distance, and community structure of the networks to understand the internal relations of the public bicycle system. The results showed that there were many stations with low usage of public bicycles. Furthermore, there was a geographical division between high-demand and low-demand areas for public bicycles. The usage of public bicycles at a station was not only related to land use but also related to the usage of bicycles at stations nearby.