空间Skyline查询处理:应用、研究与挑战

引入动态属性的空间Skyline查询处理技术正在多个领域得到应用。首先引出传统Skyline和空间Skyline的定义,进而回顾了15年来Skyline的发展历程。重点介绍了当前空间Skyline在各个领域的主要应用,并根据这些应用总结了主要的研究方法和技术。最后,给出了空间Skyline查询处理面临的诸多挑战,指出了今后的大体研究方向。     

曼哈顿路网中移动数据点的连续概率Skyline查询

Skyline queries are widely used in location-based service systems. In recent years, various application queries in Manhattan road network have received considerable attention. Considering the uncertain continuous movement of objects in road networks, we mainly research the problem of continuous probabilistic Skyline queries for uncertain moving data points in Manhattan road networks. In such queries, the query point is considered to be stationary, and the objects in road network are treated as moving data points, which are described by the probability density function. First, we acquire the initial Skyline result set according to the initial location and static attributes of the data points, then, calculate the events that could cause the Skyline result set to change by the domination relations among those moving data points, and at last, update the probability Skyline result set according to the calculated events order so as to achieve continuous probability Skyline query. Experimental results show the efficiency and effectiveness of our proposed methods.