This paper introduces and solves a novel type of spatial queries, namely, Optimal-Location-
Selection (OLS) search, which has many applications in real life. Given a data object set …

Range search is one of the most common queries in the spatial databases and geographic
information systems (GIS). Most range search processing depends on the length of the …

The application of evolutionary algorithms (EAs) to complex engineering optimization
problems may present difficulties as they require many evaluations of the objective functions …

This paper studies a new form of nearest neighbor queries in spatial databases, namely,
mutual nearest neighbor (MNN) search. Given a set D of objects and a query object q, an …

Privacy preservation has recently received considerable attention in location-based services
(LBSs). A large number of location cloaking algorithms have been proposed for protecting …

针对遗传算法所存在的早熟和收敛速度慢等问题, 基于低等生物的分裂生殖现象,
提出了分裂算子的概念, 并将该算子引入到传统遗传算法和自适应遗传算法中 …

As the grain size becomes smaller, more parallelism can be found in most programs.
However, to exploit smaller grain parallelism, more efficient synchronization primitives are …

Spatial database research has continued to advance greatly since three decades ago,
addressing the growing data management and analysis needs of spatial applications. This …

Although the direction aspect is as important as the distance aspect when retrieving spatial
objects, the studies of direction-aware queries are limited. The direction-based surrounder …

针对基于位置服务中的多个查询者聚集的场景, 提出一种兼顾用户隐私的基于区域的空间
Skyline 查询算法——VRsSA, 利用Voronoi 图等计算几何学方法, 解决了基于区域与点之间距离 …