摘要： 针对移动对象轨迹的内在不确定性及其导致的查询精度较低的问题，将已有移动对象的空间轨迹不确定性模型应用于网络移动对象的轨迹表示中。在此基础上，将概率查询方法运用到受限网络移动对象的不确定轨迹查询中，提出移动对象轨迹的不确定性点查询和概率范围查询方法。实验结果表明，该方法具有较高的查询效率。

关键词: 移动对象数据库, 不确定性, 概率范围查询

Abstract: To the point of the trajectories of moving objects are inherently uncertain and query accuracy associated with the uncertainty is low, an uncertain trajectories model is extended to the trajectories representation of the moving objects in a constrained network. Based on this model, a probabilistic approach is proposed when the uncertain spatio-temporal point query and range query are implemented and the experiment shows that the probabilistic method can be carried out with better performance.

Key words: moving objects database, uncertainty, probabilistic range query

中图分类号: 

• TP393