In order to make it more convenient and more effective to add, delete, update and query a data warehouse through QC-tree, this paper suggested how to incrementally maintain and query QC-tree.

为使通过QC树对数据仓库进行常规的增删改操作和查询操作变得更加方便和高效，提出了QC树增量维护和有效查询的详细实现算法。

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Move incrementally and maintain a reasonable minimum allocation to stocks at all times.

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