摘要
针对现有联机分析处理(OLAP)方法的空间开销随着数据维度增加呈指数级增长,因而不适用于维度较高的多维网络应用的问题,提出了一种新的多维网络数据立方体模型——封闭冰山双立方图(CI-DCG)。该模型通过引入邻接立方体的概念,将其实例化过程转化为两个计算传统数据立方体的阶段,从而可将传统数据立方体生成算法中较为成熟的空间优化技术引入到多维网络中。在保证多维网络上OLAP查询处理效率的同时,将多维网络数据立方体生成算法的空间复杂度降为多项式级别。理论分析和实验结果均表明,该模型在空间开销和查询性能方面均优于已有的多维网络OLAP模型,并且数据维度越高,这种优势就越明显。
Considering that it is valuable to support efficient on-line analytical process(OLAP) query on multidimensional networks and the space overhead of the existing OLAP methods grows exponentially with the increase of the data di- mensionality, which limits their use in multidimensional networks with high dimensionality, the closed iceberg double cubed graph (CI-DCG) , a novel data cube model is proposed. By introducing the concept of adjacent cube, the mod- el splits the process of materializing into two phases of data cube computing, which facilitates combining special characteristics of multidimensional networks with the existing well-studied data cube techniques, to gain high query performance with polynomialspace complexity. Both theoretical analysis and experimental results demonstrate the ef- ficiency and effectiveness of the CI-DCG,especially in case of high dimensionality.
出处
《高技术通讯》
CAS
CSCD
北大核心
2013年第10期1030-1037,共8页
Chinese High Technology Letters
基金
863计划(2011AA01A203
2012AA011002)
国家自然科学基金(60903047)
中国科学院先导专项(XDA06030200)资助项目