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移动对象在空间网络数据库上的kNN查询 被引量:1

Moving Object Query k Nearest Neighbors in Spatial Network Databases
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摘要 在空间网络数据库中,基于位置的服务是一项重要功能,而k-NN查询是实现该服务的重要查询.在网络上有一个原始对象(例如在道路上行驶的汽车),有一组目标对象(例如旅店、加油站、救护车等等),k-NN查询返回距离原始对象最近的k个目标对象.在这种对象移动受到网络限制的情况下,网络距离将替代Euclidean距离作为k-NN查询的指标.提出了一种解决移动对象k-NN查询的算法,该算法使用了一组索引结构来解决移动对象的位置问题.实验分析表明这种方法比传统方法的执行效率更高.
出处 《计算机研究与发展》 EI CSCD 北大核心 2007年第z3期55-60,共6页 Journal of Computer Research and Development
基金 国家自然科学基金项目(60573164) 教育部留学回国人员科研启动基金项目(K6GH625029)
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