After a brief summary on data mining and rough set theory, the research works in the thesis can be descript as follows: 1. To the problem that finding rules in enormous data is very timeconsumable and the expansibility of existed algorithms is not very good, the thesis proposes a new method to discompose large data table based on the concepts of positive region and the importance of attribute in rough set theory.

Rough集理論是一種新型的處理不確定性知識的數(shù)學(xué)工具精品国产专区在线观看，圍繞著數(shù)據(jù)挖掘領(lǐng)域存在的問題538国产在线视频，本文利用Rough集理論與Rough分析工具大尺寸的黄色视频，提出若干解決方案无码免费毛片毛机在线ww，同時(shí)在具體處理問題過程中引入了信息理論、因子分析等方法精精国产XXXX在线播放，與Rough分析結(jié)合使用国产福利最新，討論了Rough集技術(shù)在知識發(fā)現(xiàn)、關(guān)聯(lián)規(guī)則挖掘欧洲无码专区一区二区、模式分類以及數(shù)據(jù)清洗等問題中的應(yīng)用欧美淫秽。

The main procedures of the body are conducted as the following:First, this article reviewed the Rough Set elementary theory, the decision information system and the expansion of the Rough Set model.

本文的主要研究工作如下：首先，本文回顧了Rough集的基本理論国产在线视频在线视、決策信息系統(tǒng)和Rough集模型的擴(kuò)展AV无码精品久久久久精品免费。

In Chapter 5,some studies on rough set theory shows that rough set is equivalent to nonmeasurable set in some sense.

第五章對rough set理論作了一定的研究，指出了rough set與不可測集在一定意義下等價(jià)91人妻久久久精品99系列。并且借助于M无码免费A片久久。

There were about 20 people there,at a rough guess：那里約計(jì)有 20 人

I've got a rough idea of where I want to go. 我大致知道我想去哪里了. | There were about 20 people there,at a rough guess. 那里約計(jì)有 20 人. | a rough draft of a speech 講話草稿

rough cocksfoot：鴨茅

rough coating 毛粉刷 | rough cocksfoot 鴨茅 | rough colony 粗糙菌落,粗糙型菌落

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rough cocksfoot 鴨茅 | rough colony 粗糙菌落,粗糙型菌落 | rough concentration 粗選