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灰色偏相关评价法在认知型学生模型中的应用 被引量:3
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作者 冯迪 任胜兵 陈潇男 《计算机工程与应用》 CSCD 北大核心 2017年第2期245-252,共8页
针对认知能力评价这类因素较多,且难以进行定量描述的问题,建立认知能力因素评价体系,利用灰色偏相关评价法建立认知型学生模型。首先分析各认知能力因素的相互影响关系,计算偏相关系数得到各认知能力因素的权重值。然后确定评价灰类,... 针对认知能力评价这类因素较多,且难以进行定量描述的问题,建立认知能力因素评价体系,利用灰色偏相关评价法建立认知型学生模型。首先分析各认知能力因素的相互影响关系,计算偏相关系数得到各认知能力因素的权重值。然后确定评价灰类,建立白化权函数,得到各认知能力因素关于各评价灰类的灰色评价权值,从而建立认知型学生综合评价模型。最后通过实例对方法模型进行验证。实例表明,该方法模型能够对学生知识水平作出评价并引导学生进行学习,其结果具有一定的可靠性。 展开更多
关键词 敏捷学习 认知能力 认知型学生模型 灰色相关评价
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中国区域碳市场价格相关性分析 被引量:1
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作者 朱丽洁 杨爱军(指导) 《中国林业经济》 2021年第1期83-86,共4页
碳交易市场在20世纪初出现了迅猛式的增长,我国也在2011年批准了在北京、上海、天津、重庆、湖北、广东和深圳7省市碳交易市场正式开展碳交易工作。选取上述省市碳交易市场,利用person相关系数、spearman秩相关分析检验、灰色相关法对... 碳交易市场在20世纪初出现了迅猛式的增长,我国也在2011年批准了在北京、上海、天津、重庆、湖北、广东和深圳7省市碳交易市场正式开展碳交易工作。选取上述省市碳交易市场,利用person相关系数、spearman秩相关分析检验、灰色相关法对它们进行相关性分析,获得不同碳市场间的相关关系,并根据各地域碳市场的特点,分析其个性和共性,提出了碳交易市场发展的建议。 展开更多
关键词 碳交易市场 person相关系数 spearman检验 灰色相关法
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岩溶区流域月、季尺度降雨变化特征及其与台风相关性分析 被引量:3
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作者 阮俞理 莫崇勋 孙桂凯 《水力发电》 2021年第1期27-33,共7页
研究采用相对变化率、集中度和集中期分析降雨的年内分布规律,然后采用线性趋势和Mann-Kendall等研究降雨的年际变化规律,最后采用Pearson相关分析和灰色相关分析方法探讨降雨与台风的相关性特征。结果显示,各月降雨相对变化率达到30%以... 研究采用相对变化率、集中度和集中期分析降雨的年内分布规律,然后采用线性趋势和Mann-Kendall等研究降雨的年际变化规律,最后采用Pearson相关分析和灰色相关分析方法探讨降雨与台风的相关性特征。结果显示,各月降雨相对变化率达到30%以上,降雨趋于集中化,主要集中在7月份;月平均降雨量相对稳定,春、夏季降雨减少,而秋、冬季降雨呈增加趋势;降雨的突变发生在20世纪80~90年代。在台风各影响因子中,台风降雨是影响夏秋降雨的主要因素,而台风发生次数对降雨量影响最小。 展开更多
关键词 降水特征 台风 相关性分析 MANN-KENDALL 灰色相关分析
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Multi-attributed decision making for mining methods based on grey system and interval numbers 被引量:7
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作者 刘浪 陈建宏 +1 位作者 王革民 劳德正 《Journal of Central South University》 SCIE EI CAS 2013年第4期1029-1033,共5页
In the case of unknown weights, theories of multi-attributed decision making based on interval numbers and grey related analysis were used to optimize mining methods. As the representative of independence for the indi... In the case of unknown weights, theories of multi-attributed decision making based on interval numbers and grey related analysis were used to optimize mining methods. As the representative of independence for the indicator, the smaller the correlation of indicators is, the greater the weight is. Hence, the weights of interval numbers of indicators were determined by using correlation coefficient. Relative closeness based on positive and negative ideal methods was calculated by introducing distance between interval numbers, which made decision making more rational and comprehensive. A new method of ranking interval numbers based on normal distribution was proposed for the optimization of mining methods, whose basic properties were discussed. Finally, the feasibility and effectiveness of this method were verified by theories and practice. 展开更多
关键词 mining method interval number multi-attributed decision making grey related analysis correlation coefficient normaldistribution RANKING
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Electroacupuncture at jiājǐ(夹脊 EX-B2) for lumbar intervertebral disc herniation:A randomized controlled trial 被引量:7
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作者 Ping SHAO Zhen DU +4 位作者 Zhiping XIN Xiao ZHENG Minlei QIU Zheng ZHU Xuming YANG 《World Journal of Acupuncture-Moxibustion》 CSCD 2018年第3期167-173,I0003,共8页
Objective: To compare the effect differences of electroacupuncture(EA) at Jiajǐ(夹脊 EX-B2) and conventional acupoints for lumbar intervertebral disc herniation(LIDH) and the factors influenced the effect duri... Objective: To compare the effect differences of electroacupuncture(EA) at Jiajǐ(夹脊 EX-B2) and conventional acupoints for lumbar intervertebral disc herniation(LIDH) and the factors influenced the effect during the way of data mining.Methods: A total of 160 patients of LIDH were randomly assigned into the EX-B2 group and the conventional acupoints group, 80 cases in each one. The patients in the EX-B2 group received EA at the symmetrical 2 acupoints of the bilateral EX-B2 on the lesion part. The patients in the conventional acupoints group received EA at the tender point of the lesion part, Zhibian( 秩边BL54), Huantiao(环跳 GB30),weǐzhōng(委中BL40), Chéngshān(承山BL57) and Fúyáng(跗阳BL59) on the affected side. The retain time of the needles is both 45 min. The treatment of the two groups is 3 times a week and for a connective 20 times. The modified Assessment Criteria for Low Lumbar Pain of Japanese Orthopedic Association(JOA),Visual Analogue Scale(VAS) were evaluated before and after the treatment and at the 6-month follow up.Results:(1) Effective outcomes. JOA score: The JOA score of the patients in the EX-B2 group after treatment was(20.89 士 3.43), and was(19.35 ±4.02) on the follow-up. Compared with the JOA score(12.35 ±4.42) in the same group before the treatment, there were statistical significant higher(both P0.05). The JOA score in the EX-B2 group after treatment and on the follow-up were both higher than that of the conventional acupoints group at the same time point(both P0.05). VAS score: The VAS score of the patients in the EX-B2 group on the 24 h after the first treatment was(4.09 ± 1.81), and was(2.11 ± 1.30) after the treatment. Compared with the VAS score(4.09 ± 1.81) in the same group before the treatment, there were statistical significant lower(both P0.05). The VAS score in the EX-B2 group on the 24 h after the first treatment and after treatment showed no statistical differences than that of the conventional acupoints group at the same time point(both P0.05).(2)Related results from data mining: The middle-aged people and disease duration less than six months, their effect of the immediate treatment was the best. According to JOA score, EA at EX-B2 was better than EA conventional acupoints,either in the process of treatment effect, or in pertinence of the treatment, which were superior to EA conventional acupoints therapy; The best curative effect time of EA at EX-B2 was the first treatment after24 h, and the best curative effect of the conventional acupoints was after the first treatment. The age and disease duration also affected curative effect.Conclusion: The effect of EA at EX-B2 was superior to the conventional acupoints in treating LIDH. 展开更多
关键词 ELECTROACUPUNCTURE jiājǐ(夹脊 EX-B2) Lumber intervertebral disc herniation Association algorithm Decision tree Grey slope correlation algorithm Effect
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