由幂格的定义知，幂格与幂集格是不同的，然而它们却有一定的联系。
Based on in which the concept of the power lattice is given, this paper discusses relation between power lattice and power set lattice in some condition.
采用项集格生成树的数据结构，将最大频繁项集挖掘过程转化为对项集格生成树进行深度优先搜索获取所有最大频繁节点的过程。
The itemset lattice tree data structure was adopted to translate maximal frequent itemsets mining into the process of depth-first searching the itemset lattice tree.
执行SQL查询并从查询结果集的每个字段中创建电子表格单元格，实现这些操作很简单。
It's quite easy to execute an SQL query and then create spreadsheet cells from each field of the query result set.
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