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Advances, Systems and Applications

Table 3 Symbol description of the window model

From: Multi-type concept drift detection under a dual-layer variable sliding window in frequent pattern mining with cloud computing

Symbol

Meaning

\(N\)

Window length

\({N^{\prime}}\)

Length after the window size change

\({T_{new}}\)

The latest data at the current moment of the window

\({T_{new^{\prime}}}\)

The latest data for the new entry window

\({T_{new - N + 1}}\)

End data of the current moment of the window

\({T_{new^{\prime} - N + 1}}\)

End data of the new entry window

\(\left| {new^{\prime} - new} \right|\)

Number of data between \({T_{new - N + 1}}\) and \({T_{new^{\prime} - N + 1}}\)