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摘要(Abstract)

近年来,随着移动计算和无线通信等技术的发展,时空数据库广泛应用于交通控制和全球定位等领域。为了支持时空查询和有效地管理时空数据库中海量的时空对象,专家学者提出了大量的时空索引方法。首先对时空索引进行归纳总结,描绘了时空索引演化历史图;接着对时空查询类型进行介绍;根据时间维将时空索引分为索引过去、当前、将来和全时态4类,根据空间维将时空索引分为移动点和移动区域两类,在此分类基础上对各种时空索引方法进行了阐述;最后对时空索引的研究方向进行了展望。 关键词:时空索引 时空数据库 时空查询 索引R-Trees、Quad-Trees、K-D Trees以及Space Filling Curve


主题(Topic)

curriculum-learning curriculum-learning- reinforcement-learning reinforcement-learning- curriculum-learning-paper adversarial-reinforcement-learning applied-reinforcement-learning berkeley-reinforcement-learning carla-reinforcement-learning causal-reinforcement-learning checkers-reinforcement-learning constrained-reinforcement-learning continuous-reinforcement-learning coursera-reinforcement-learning deep-reinforcement-learning dissecting-reinforcement-learning distributed-reinforcement-learning feudal-reinforcement-learning hierachical-reinforcement-learning hierarchical-reinforcement-learning interactive-reinforcement-learning inverse-reinforcement-learning meta-reinforcement-learning minecraft-reinforcement-learning multiagent-reinforcement-learning munchausen-reinforcement-learning practical-reinforcement-learning pytorch-reinforcement-learning recurrent-reinforcement-learning reinforcement-learning-agent reinforcement-learning-agents reinforcement-learning-alberta reinforcement-learning-algorithm reinforcement-learning-algorithms reinforcement-learning-analysis reinforcement-learning-books reinforcement-learning-bot reinforcement-learning-bots reinforcement-learning-cartpole reinforcement-learning-concepts reinforcement-learning-datasets reinforcement-learning-environ reinforcement-learning-environment reinforcement-learning-environments reinforcement-learning-examples reinforcement-learning-excercises reinforcement-learning-exercises reinforcement-learning-frame reinforcement-learning-options
项目(Project)