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Since any frequent itemset is a subset of a maximal frequent itemset (an itemset is maximal frequent if it has no superset that is frequent), this paper proposes the DMFI (Discovery of Maximal Frequent Itemsets) algorithm for mining all the maximal frequent itemsets from data sets. This algorithm searches the maximal frequent itemsets in data sets from both bottom-up and top-down directions in the meantime. This paper proposes an algorithm that evaluates the boundaries on the support and confidence of uncalculated itemsets by exploiting the information provided by the calculated itemsets.

本文在经典关联规则的基础上，提出了一系列扩展的关联规则开采算法：发现关联规则的难度体现在发现频繁项目集上，事实上最大频繁项目集（其所有的超集都为非频繁项目集的频繁项目集）的集合已经包含了所有的频繁项目集，本文提出一种发现最大频繁项目集的算法DMFI(Discovery Maximal Frequent Itemsets)，该算法采用自底向上和自顶向下相结合的搜索策略对数据空间进行有效的搜索。

All areas to be touched up with understroke paint before top coat is applied.

喷最后一层漆之前，所有区域应修改，润色。此方法同样适用于分包合同中

They want the undiscovered Top Guns of automotive design to step up and show their true grit.

他们希望未被发现顶枪的汽车设计，以加强和显示其真正的勇气。

That ungainly descent should now come to an end. But it is still an awfully long way back up to the top.

迪拜的经济下滑应该已经触底，但要回到其鼎盛时期，还有极其漫长艰辛的路要走。

We will come up against top sides here. What counts for Italy will be the group unity that is strong with plenty of togetherness.

我们将会与一流的球队竞争，意大利所能依靠的就是球队的团结一致，无间的合作将会给我们带来力量。

V Irish poets, earn your trade, Sing whatever is well made, Scorn the sort now growing up All out of shape from toe to top, Their unremembering hearts and heads Base-born products of base beds.

爱尔兰诗人，学好你们的专业，歌唱那美好地做成的一切，轻视那种正从头到脚都已失去了模样的奥妙，他们缺乏记忆的头和心——低卑的床上的低卑的产品。

This doesn't mean I'm not in favour of having women in senior positions - women make up half the population and it seems a shame to have them so unrepresented at the top of companies.

这并不意味着我不支持女性担任高级职位--女性占总人口的一半，因此公司顶级职位中女性如此之少似乎是一种耻辱。

Lady macbeth:...come ,you spirits that tend on mortal thoughts unsex me here and fill me from the crown to the toe top-full of direst cruelty make thick my blood,stop up the access and passage to remorse ,that no companctious visitings of nature shake my fell purpose noe keep peace between the effect and it!

麦克白夫人：。。。来，注视着人类恶念的魔鬼们！解除我的女性的柔弱，用最凶恶的残忍自顶至踵注在我的全身，凝结我的血液，不要让怜悯钻进我的心头，不要让天性中的恻隐摇动我的狠毒的决意！

Unsex me here, And fill me from the crown to the toe top full Of direst cruelty; make thick my blood, stop up the access and passage to remorse, that no compunctious visiting of nature shake my fell purpose, nor keep peace between The effect and it!

来吧！恶灵们，带走我的柔弱，让残忍自顶至踵贯注我的全身，凝结我的血液，抹去一切怜悯，不要让天性中的恻隐摇动我狠毒的决意！

Top students brook no intrusions on study time. Once the books are open or the computer is booted up, phone calls go unanswered, TV shows unwatched, snacks ignored.

优等生在学习时绝不被外界干扰，一旦进入学习状态，电话铃声、电视节目、小吃零食就不再影响到他们了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。