To speed up mining sequential patterns, reducing the time cost is very important during discovering sequential frequent sequence.

提高序列模式挖掘算法效率的关键在于减少发现频繁序列的时间。

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According to the complexity of pattern, the mined characteristic patterns could be sorted as frequent item, frequent sequence and frequent sub tree, etc.

根据特征模式复杂性，可分为频繁项模式、频繁序列模式以及频繁子树模式等。

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An active research in data mining area is the discovery of sequential patterns, which finds all frequent sub-sequences in a sequence database.

数据挖掘领域一个活跃的研究分支就是序列模式的发现，即在序列数据库中找出所有的频繁子序列。

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