A Regression-Based Temporal Pattern Mining Scheme for Data Streams Wei-Guang Teng Ming-Syan Chen Philip S. Yu VLDB 2003.

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Presentation transcript:

A Regression-Based Temporal Pattern Mining Scheme for Data Streams Wei-Guang Teng Ming-Syan Chen Philip S. Yu VLDB 2003

Introduction An important application area Market basket analysis The difficulty of data stream applications

An example of online transaction flows

A Regression-Based Algo. FTP-DS Two major features One data scan for online statistics collection Regression-based compact pattern representation

One scan for online statistics collection Generation of frequent temporal itemsets (MinSup = 0.4)

Regression-based Analysis The analysis is employed to capture the trends of frequent patterns Linear function Conforming to the least squares

The time series of averaged support for the inter-transaction itemset (c,g)

ATF Form Def : Purpose To compact the data when we track the frequency variations

The fit line of regression analysis