Bike sharing is one of the means of green travel. On the one hand, sharing bicycles facilitates people’s travel and enriches the way of travel. On the other hand, sharing bicycles improves people’s awareness and sense of responsibility for energy saving and emission reduction, which in turn reflects the meaning of green travel. In order to support people using shared bicycles for green travel, it is very important to optimize the configuration of bike-sharing system. The increasing amounts of free-floating bicycles give a serious challenge in parking planning. Dispatching random parking bicycles will increase vehicles workload and offset emission reduction effect of the bicycles. At this paper we discuss about the virtual stations in a free-floating bike-sharing system. This method is the focus of efficient and environmentally friendly dispatching, which enables the bike-sharing company to achieve cleaner production. We introduce the modifiable areal unit problem and propose a new method called the graded cluster system to mine virtual stations on a multiscale geographic view. The new method can generate more virtual stations more evenly. This not only makes it more convenient for people to use shared bicycles for green travel, but also dense virtual stations can make shared bicycles more visible in people’s sight, strengthening people’s awareness of green travel.

共享单车是绿色出行的手段之一。一方面，共享自行车方便人们出行，丰富了出行方式。另一方面，共享自行车可以提高人们的节能意识和责任感，这反过来又体现了绿色出行的意义。为了支持使用共享自行车进行绿色出行的人们，优化自行车共享系统的配置非常重要。越来越多的自由浮动自行车给停车计划提出了严峻的挑战。调度随机停车的自行车会增加车辆的工作量并抵消自行车的减排效果。在本文中，我们讨论了自由浮动自行车共享系统中的虚拟站点。这种方法是高效，环保的调度重点，这使自行车共享公司可以实现更清洁的生产。我们介绍了可修改的面积单位问题，并提出了一种称为分级集群系统的新方法来在多尺度地理视图上挖掘虚拟站点。新方法可以更均匀地生成更多虚拟站。这不仅使人们更方便地使用共享自行车进行绿色旅行，而且密集的虚拟站点可以使共享自行车在人们的视野中更加可见，从而增强了人们的绿色旅行意识。