共查询到20条相似文献，搜索用时 93 毫秒
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王金玲 《赤峰学院学报(自然科学版)》2009,25(3):143-145
本文主要阐述了关联规则的概念,并重点介绍了关联规则中的经典算法Apriori算法.利用Apriori算法.对学校教学评价进行数据挖掘,分析挖掘结果. 相似文献
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关联规则评价方法综述 总被引：1，自引：0，他引：1
关联规则的评价方法可分为客观评价和主观评价两种,大部分都是基于统计学的方法.本文对各种关联规则评价方法进行了综述,并阐述了各自的优缺点. 相似文献
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不一致决策表的处理一直是比较困难的问题.鉴于不一致规则的不确定性,基于包含度这一描述不确定性关系的有效度量方法,综合不一致规则信息与整个决策表信息,对不一致规则进行修正,进而获取较理想的决策规则,并通过实例进行验证. 相似文献
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唐丽 《绵阳师范学院学报》2009,28(2)
决策系统中最为核心的问题是关于决策规则的获取问题.在有关学者的研究基础上,讨论了 Vague决策表中有关性质;此基础上提出一种新的决策规则--Vague决策规则,并将决策表应用于心电图分类识别,准确地对具体病例进行判断,取得了比较好的效果. 相似文献
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对Apriori算法在数据库扫描和产生的候选项集的问题进行分析,提出一种基于矩阵的关联规则算法,该算法将事务数据库转换为向量矩阵,并通过向量矩阵的运算得到较少的候选项集,提高算法的运行效率.该算法在高校教学评价的应用上取得良好效果. 相似文献
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提出了规则合并的优化方法和重复记录聚类清除的方法.应用模糊等值理论,避免了传统等值理论非此即彼的僵硬方式,但清理过程中部分规则可能存在包含与被包含的关系,被包含的规则其等值度显然会相对较小,根据用户阀值提出了规则合并的优化方法,可减少重复记录的计算时间.基于同样的原因,规则间的包含与被包含关系将影响模糊等值度的误差分析,因此提出了利用忽略被包含的规则等值度提高误差分析精度的改进模糊等值理论误差分析方法.重复记录的核实通常需要人工逐条检测,易于出错,本文提出的聚类算法,可节省大量的用户劳动.最后给出一个实验,表明了规则优化的可能性. 相似文献
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翁锦琳 《宁德师专学报(自然科学版)》2012,24(2):201-205
研究数据挖掘领域中的关联规则及其在学生成绩分析中的应用.设计并实现学生成绩关联规则分析系统,利用该系统对学生成绩进行分析,得出学生不同课程之间的联系及不同课程对总成绩的影响,从而为教学工作提供指导作用. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献