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Mining Frequent Itemsets from Data Streams with a Time-Sensitive Sliding Window

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Figure 1: Landmark model
Figure 2: Time-fading model
Figure 5: Time-sensitive sliding-window model  Since all the methods developed under other models  accumulate the support count for each frequent itemset,  no discounting information is provided
Figure 6 shows the system framework of our approach.  The data stream is a series of transactions arriving  continuously
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