Then mine the set and get all frequent class association rules that satisfy the minimum support.

然后对该事务集进行数据挖掘，找出所有的满足最小支持度的类别关联规则。

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In particular, the class association rule (CAR), which can be used not only for concept description but also for class prediction and decision-making, has an important role in data mining.

特别是分类关联规则既能用于概念描述又能用于分类预测与决策，在数据挖掘中发挥重要作用。

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Then the decision tree and class association rules mining are used on the video attribute database to extract a decision tree classification rule set and a class association rule set respectively.

然后分别使用决策树、分类关联规则等技术对视频属性数据库进行数据挖掘，提取出决策树分类规则集和分类关联规则集；

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The National Association for Sport and Physical Education says twenty to thirty students in a P.E.class should be the limit.

VOA: special.2009.08.06

"They're not light at all, " says David Pitman, secretary of the J-Class Association.

FORBES: Magazine Article

And the J-Class Association can change the rules whenever it wants.

FORBES: Magazine Article

Five more are under construction or approved by the J-Class Association, which requires class members to build the boats according to pre-1939 plans with a few allowable deviations.

FORBES: Magazine Article