中文摘要：

流式数据固有的动态性、无限性等特征给流式数据的多维建模与分析带来了巨大的挑战。基于流式数据的这些特征,提出了一种相应的流式数据多维模型。该模型通过时间维度中多层次时间窗口的定义,刻画了流式数据的动态性和无限性,并且对快照操作、持续操作以及动态维护等流式数据特有的操作形式进行了描述,从而为流式数据多维查询与分析奠定了理论基础。

英文摘要：

Due to the characteristics of data stream （e. g. , dynamic, infinite）, the multidimensional modeling and analysis of data stream are confronted with a tremendous challenge. A multidimensional model of data stream based on the above characteristics is introduced. The dynamic and infinite of data stream are depicted through the definition of multi-level time windows in time dimension, and the special operations of data stream such as snapshot, persistence and dynamic maintenance are described. Thereby it can provide the theoretic foundation for the multidimensional querying and analysis of data stream.