【摘要】 本文分析现有的7种基态修正模型,发现多基态修正模型中的基态均以快照方式存储,当历史久远时需要创建的基态数较多,所占用的存储空间较大,如果不建立那么多基态,两个基态之间的差文件过多,就会使检索效率低下,所以说现有的多基态修正模型并不能真正做到不受历史久远的影响。作者提出为基态建立索引的方法可以解决该问题,该方法不仅可减少多基态修正模型中基态所占用的存储空间,并且可以提高时空数据操作的效率,真正做到不受历史久远的影响。更多还原

【Abstract】 Seven kinds of existed spatio-temporal data models based on state with amendment were analyzed in this paper.Through several times amendment on the data model,some defects still existed.In this paper,the author proposed an improved method for multi-base states with amendments on spatio-temporal data model.The main idea of this method is to create index for the multi-base states.Comparing with exited methods,this method can save storage space and improve resuming speed of history.Moreover,there is no length limit of history.更多还原