OLAP按照数据立方体模型组织多维数据，从而方便了查询。
OLAP organizes multidimensional data against data cube model, which is convenient to queries.
另外根据实际应用背景，提出了一种混合数据立方体模型，并给出了其相应的查询和增量更新算法。
According to the practical context, this thesis raises a kind of hybrid data cube model and its query and incremental update algorithm.
本文提出了数据超立方体模型，并在代数表达方面进行了改进，使得其可以支持OLAP操作。
In this paper, we address this issue by proposing a model of a data-cube and an algebra to support OLAP operations on this cube.
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