摘要
基于位置的应用、电子移动设备等技术的发展,使得从移动端获取时空和语义信息更便捷。时空轨迹点附着语义信息后形成语义轨迹。语义轨迹的高效查询在智慧旅游中体现出极大价值。但现有多数旅游系统仅支持时空或文本单方面查询,效率亦不理想。研究在语义轨迹上基于ITS-树的高效最近邻查询处理方法。提出的ITS-Tree索引同时融合空间及文本信息,有助于从原始轨迹集中快速定位与用户需求匹配度最高的k条最近邻语义轨迹,供其出行参考。
The development of technologies such as location-based applications and electronic mobile devices makes it easier to obtain time-space and semantic information from mobile terminals. Seismological information is formed after the space-time trajectory points which are attached to semantic trajectories. The efficient query of semantic trajectory show great value in smart tourism. However,most existing travel systems only support time and space or textual unilateral inquiries,and their efficiency is not satisfactory. In this paper,we studied the efficient nearest neighbor query processing method based on ITS-tree in semantic trajectory. The proposed ITS-Tree index simultaneously fused spatial and text information. It helped to quickly locate the k-nearest neighbor semantic trajectories with the highest degree of matching with user requirements from the original trajectory for reference.
作者
孙一格
马昂
吴雷
潘晓
郭景峰
Sun Yige;Ma Ang;Wu Lei;Pan Xiao;Guo Jingfeng(School of Economics and management, Shijiazhuang Tiedao University, Shijiazhuang 050043, Hebei, China;Key Research Base jbr Humanities and Social Sciences in Hebei Provinee , Shijiazhuang Tiedao University , Shifiazhuang 050043 , Hebei , China;School of Information Scienee and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China)
出处
《计算机应用与软件》
北大核心
2018年第6期36-41,75,共7页
Computer Applications and Software
基金
国家自然科学基金项目(61472340
61303017)
河北省自然科学基金项目(F2014210068)
河北省教育厅青年基金项目(QN2016083)
石家庄铁道大学第四届优秀青年科学基金项目(Z661250444)
石家庄铁道大学研究生创新项目(YC201718)
国家级大学生创新创业训练计划项目(201610107003)
河北省管理科学与工程重点学科研究基地
河北省软科学研究基地资助支持
关键词
语义轨迹
K近邻查询
查询处理
智慧旅游
Semantic trajectory
K nearest neighbor query
Query processing
Smart tourism
