模糊层次分析法及在军校学员综合素质评估中的应用

通过定义模糊数的限位系数 ,得到由限位系数确定模糊数排序的新方法 ,并将其运用于层次分析排序 ,改进了层次分析法的理论及方法 .最后介绍了模糊层次分析法在军校学员综合素质评估体系中的应用实例 .     

软土地基深基坑围护方案综合评价

针对国内目前深基坑围护方案设计中,只重视技术设计。而缺乏对造价、环境、工期及不可见等因素综合考虑的现状,本文建立了基于一定设计条件下对围护设计方案综合评价的模糊识别矩阵。     

Fuzzy statistic and comprehensive evaluating study for activity characterization of the active region

In this paper, the theory and method of the fuzzy mathematics are used to probe the connection between the activity of the active region and characterization of the sunspot groups, to build the subordinating function according to the relationship between them and to evaluate comprehensively the activity of the active region on the solar disk. The precise prediction of activity of the active regions has been obtained by data reduction and analysis. The predicting accuracy is higher than 95%. Forecast results indicate that the method of the fuzzy comprehensive evaluation is a good one for the solar activity prediction.     

滏阳河水质综合评价

本利用未确知测度模型对滏阳河水质污染程度进行综合评价,模型建立在未确知测度空间基础上,根据评价空间的有序性,建立置信度识别准则与评分准则,是水环境质量综合评价的实用模型。     

主成份分析在证券市场个股评析中的应用

本文利用主成份分析方法 ,对证券市场上 31种股票进行综合评价 ,通过使用统计软件SAS进行计算和分析 ,提出用第一主成份作为个股业绩的度量 ,得到了这些股票 1997年上半年财务状况的排列次序     

全二维气相色谱用于轻质石油馏分中芳烃含量的测定

建立了采用全二维气相色谱(GC×GC)技术一次进样完成轻质石油馏分中非芳烃、一环芳烃和二环芳烃的分离、定性 和定量。通过对柱系统的选择和色谱条件的优化,实现了一次全二维气相色谱分析即完成轻质石油馏分的族组成分离以及 目标化合物的分离。方法的加标回收率为89.5%～106.1%;样品中各组分含量重复测定的相对标准偏差均不大于5.8%,能 够满足样品测定的精密度和准确性要求,且完成1次分析最多只需要30 min。     

地方综合性院校开展数学建模协会活动的实践与研究

简要介绍了济南大学数学建模协会的开展情况,分析了地方综合性院校开展建模协会时存在的困难,指出了做好建模协会工作应当遵循的一些原则.     

A comparative study on volatile metabolites profile of Dracaena cochinchinensis (Lour.) S.C. Chen xylem with and without resin using GC‐MS

Dragon's blood is a famous traditional Chinese medicine produced from source plants under bio‐ or abio‐stress. Dracaena cochinchinensis (Lour.) S.C. Chen xylem (DX) is one of the most important sources of the medicine. In this work, a GC‐MS method was developed for analysis of the n‐hexane extracts of DX with resin (DXR) and without resin (DXW). The repeatability of the method was also investigated for a metabolite comparative study of the different xylems. About 80 components were detected, 26 of which were identified in both DXR and DXN. Three sesquiterpenes (τ‐cadinol, τ‐muurolon and α‐cadinol) were first discovered in Dracaena cochinchinensis (Lour.) S.C. Chen. The chromatographs of the two plant materials were compared and differences of compounds were found. It showed that phytosterols showed a dramatic rise in content, and sesquiterpenes were found to be synthesized in DXR. Copyright © 2015 John Wiley & Sons, Ltd.     

群体综合评价中兼顾权威与共识的专家权重方法研究

针对多指标综合评价中专家权重确定问题,提出一种新的专家赋权思路.首先,对评价对象的每个指标都设定一组相应的专家主观权重值,以反映专家在不同指标中的重要性程度.其次,依据专家所作出的评价信息,首次提出基于专家个体与群体意见的偏差达到最小(即共识最大)的准则,通过构建最优规划模型求解客观权重.最后将专家主观权重与客观权重有效集结,得到兼顾个体权威与群体共识的综合权重.实例分析说明了该方法的可行性和有效性.     

基于面板数据的伊犁州直县(市)居民消费水平的聚类分析研究

运用多元统计分析中聚类分析的方法,对新疆伊犁州直十个县(市)2012年社会综合消费水平的数据进行了比较分析,综合评价了各地区的居民消费水平,并根据得到的分类情况提出了相应的改进意见,使之进一步改善和提高.