A UDMFI(updating for distributed maximal frequent itemsets) algorithm was introduced under distributed database of data horizontal distribution.It considered the updating mining of global maximal frequent itemsets when minimum support measure threshold was adjusted dynamically.The proposed frequent pattern tree(HFP-Tree,head of frequent pattern tree) with header table stored the data.When the minimum support measure threshold was changed into a small or large one,some of original maximal frequent itemsets h...
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