计算机科学 ›› 2021, Vol. 48 ›› Issue (9): 86-94.doi: 10.11896/jsjkx.200900040
所属专题： 智能数据治理技术与系统
罗月童, 汪涛, 杨梦男, 张延孔
LUO Yue-tong, WANG Tao, YANG Meng-nan, ZHANG Yan-kong
摘要： 随着智慧城市的不断发展,基于交通卡口自动获取车辆行车轨迹,为基于轨迹的车辆行为分析奠定了基础。但是,因为卡口的位置固定,车辆轨迹表示为卡口序列,所以文中首先将卡口和轨迹分别映射为单词和句子,应用语句的语义相似性方法计算轨迹相似性;然后在轨迹相似性的基础上提出轨迹熵,用轨迹熵度量某个车辆所有轨迹的规律性;最后基于轨迹熵分析车辆的行为特征,如轨迹熵低的车辆意味着行车特别有规律,很可能是通勤车。为便于用户进行深入分析,文中进一步提供了包含多联动视图的可视分析系统,允许用户观察和比较车辆轨迹和轨迹熵,结合聚类分析和相关交互,帮助用户发现有意义的车辆行为,如上下班的通勤车的轨迹熵较低、游街模式的出租车轨迹熵很高。对昆明市2019年2月份的卡口数据集进行了分析,结果表明所提方法能有效发现不同轨迹熵区间内的车辆出行行为及其特点,证明了所提方法的有效性。
中图分类号:
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