摘要
针对兰州市公共自行车系统在运行过程中出现的部分站点设置不合理及自行车利用率低等问题,提出基于改进的C4.5分类算法的公共自行车站点设置和锁桩配置评价模型.以兰州市公共自行车站点的实际运行数据为基础,利用R语言对站点的租车频次、还车频次和租车时长等数据进行统计并分析,结合改进的C4.5分类算法对已部署站点的区域进行分析,构建公共自行车系统评价决策树,接着以数据间的耦合协调度为基准,确定站点设置的效果等级,得出站点设置的优劣.最后对比不同站点的设置效果,并结合站点运行数据的分布,对设置不合理站点提出改进方案,为优化公共自行车系统提供参考.
Aimed at the problems that the setting of partial parking site is unreasonable and the utilization of bicycles is low in the operational process of the Lanzhou public bicycle system,an assessment model of parking site setting and lock-pile disposition is proposed for the public bicycle system based on the modified C4.5 classification algorithm.Taking the actual operational data of the parking sites of Lanzhou public bicycle system as assessment basis the operational data of bicycle parking sites such as rental frequency,return frequency and rental duration is counted up and analyzed with R-language.With the help of the modified C4.5 classification algorithm,the area of parking site disposed already is analyzed,the assessment decision tree of the public bicycle parking system is built,and the effect grades of site setting are consequently determined by taking the coupling coordination degree as a benchmark,so that it will be aware that the site setting is either excellent or inferior.Finally,by comparing the setting effect of different parking sites and using their operation data distribution,the improvement plan is presented for the unreasonably set parking sites,providing a reference to optimization of the public bicycle system.
作者
赵宏
史瑞刚
ZHAO Hong;SHI Rui-gang(College of Computer and Communication,Lanzhou Univ.of Tech.,Lanzhou 730050,China)
出处
《兰州理工大学学报》
CAS
北大核心
2018年第2期107-112,共6页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(61262016)
甘肃省自然科学基金(1208RJZA239)
甘肃省高校基本科研基金(04-056001)
兰州市科技项目(2012-02-64)
关键词
公共自行车系统
C4.5改进算法
耦合协调度
评价决策树
public bicycle system
modified C4.5 algorithm
coupling coordination degree
assessment decision tree
