总结了决策树的剪枝方法，并给出了动态模糊决策树的剪枝策略。

Then, with the summing-up of pruning methods of decision tree, we make certain the pruning strategy that adapts to dynamic fuzzy decision tree.

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模糊决策树是决策树在模糊环境下的一种推广，它作为一种知识表示形式更符合人类的思维。

Fuzzy decision tree is the generalization of decision tree in fuzzy environment, and the knowledge represented by fuzzy decision tree is more natural to the way of human thinking.

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通常，模糊决策树算法是在清晰决策树算法的基础上进行改进得到的，是对清晰决策树算法的扩展。

Typically, the fuzzy decision tree algorithm is an improvement of the crisp decision tree algorithm, and is an extension of the crisp decision tree algorithm.

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