共查询到20条相似文献,搜索用时 62 毫秒
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多属性决策的组合赋权优化方法 总被引:6,自引:0,他引:6
针对多属性决策中属性权重的确定问题,提出了一种主观权重与客观权重的集成方法。对每个决策属性,将各个决策者给出的主观权重和客观权重作为样本点,采用规划的方法来集成主观权重和客观权重,使决策结果更加可靠、可信。 相似文献
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基于专家动态权重的群组AHP交互式决策方法 总被引:2,自引:0,他引:2
为了能在群组决策中得到更为客观和准确的决策结果,在把专家权重划分为静态权重和动态权重的基础上,研究了在交互式决策中专家动态权重的确定方法,给出了共识度的一个定义.在此基础上,研究了群组AHP交互式决策方法中的一致性和相容性检验,给出了基于专家动态权重的群组AHP交互式决策方法流程,最后用一个示例说明了该方法的应用步骤. 相似文献
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关于求解DEA原始CCR模型中最优输入输出权重的方法 总被引:7,自引:0,他引:7
本文给出了求解DEA原始CCR模型中最优输入输出权重的简便方法:首先将原始CCR模型化为线性规划模型,然后从该线性规划模型的对偶模型入手,运用单纯形法,在得到决策单元最优效率评价指数时,根据线性规划的对偶理论,得到决策单元最优输入输出权重。该权重可用在逆DEA新算法中。 相似文献
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多目标多维模糊决策模型的模糊交叉算法 总被引:4,自引:1,他引:3
对多目标多维模糊决策模型做了进一步研究,提出一种模糊环境下带有目标权重主观监督因子的目标函数,提出了计算模糊决策识别矩阵与目标权重的模糊交叉计算公式。该算法既充分利用了模糊决策中的客观信息,又充分利用了决策专家的知识与经验,将客观定权与主观定权有机结合起来,为求解最优模糊决策识别矩阵和确定目标最优权重提供了一种有效途径,进一步丰富了多目标多维模糊决策理论模型。将本文提出的模糊决策方法应用于16家电炉炼钢企业的模糊综合评价决策,取得了较为满意的效果。 相似文献
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在数据包络分析(DEA)中,公共权重模型是决策单元效率评价与排序的常用方法之一。与传统DEA模型相比,公共权重模型用一组公共的投入产出权重评价所有决策单元,评价结果往往更具有区分度且更为客观。本文考虑决策单元对排序位置的满意程度,提出了基于最大化最小满意度和最大化平均满意度两类新的公共权重模型。首先,基于随机多准则可接受度分析(SMAA)方法,计算出每个决策单元处于各个排名位置的可接受度;然后,通过逆权重空间分析,分别求得使最小满意度和平均满意度最大化的一组公共权重;最后,利用所求的公共权重,计算各决策单元的效率值及相应的排序。算例分析验证了本文提出的基于SMAA的公共权重模型用于决策单元效率评价与排序的可行性。 相似文献
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张惠源 《数学的实践与认识》2017,(12):21-37
针对排名结果是由分差大的那部分评委主导,分差小的评委的决策意见往往被湮没的问题给出基于AHP的群决策排名方法.详细介绍了多属性群决策专家权重确定的方法、属性权重确定的方法和信息集结的方法. 相似文献
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针对模糊决策信息环境下的专家权重确定问题提出一种基于Shapley值的Pythagorean模糊多属性群决策方法。本文引入Shapley值和特征函数的定义,提出Pythagorean模糊距离测度和Pythagorean模糊决策误差信息矩阵等概念,并研究它们的性质。进一步,构建基于Shapley值的Pythagorean模糊专家权重确定模型和属性权重确定模型。针对决策信息是以Pythagorean模糊数形式给出的决策问题,提出一种基于Shapley值的Pythagorean模糊多属性群决策方法,并应用到应急救援中,验证了该方法的有效性。 相似文献
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F. J. Schuurmann P. R. Krishnaiah A. K. Chattopadhyay 《Journal of multivariate analysis》1973,3(4):445-453
In this paper, the authors cosider the derivation of the exact distributions of the ratios of the extreme roots to the trace of the Wishart matrix. Also, exact percentage points of these distributions are given and their applications are discussed. 相似文献
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《European Journal of Operational Research》2005,161(2):377-385
The valuation of levered investment in the practice is made with the WACC approach, even if the superior technique of the APV is available. The paper shows that the APV can be interpreted as the arbitrage free value of the portfolio made by an investment and a supporting loan. Therefore the WACC evaluation, generally different from the APV, allows for arbitrage. We provide various conditions which completely characterize the sign of the error as a functions of all the variables entering the model. 相似文献
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用常微分方程模型分析预防和隔离措施对SARS发病率的影响 总被引:2,自引:2,他引:0
通过建立常微分方程模型 ,分析了预防和隔离措施对 SARS发病率的影响 ,并把计算结果与实际统计数据进行了比较 ,结果表明 ,及时高效的预防和隔离措施能够有效地控制 SARS的传播 . 相似文献
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Hans Jürgen Borchers 《Annales Henri Poincare》2002,3(1):1-17
The spectrum of the translations in local quantum field theory will be analyzed in order to show that in a positive energy representation without vacuum vector and with lowest mass m1 there is no gap in the spectrum which is larger than 2m1. In particular in a zero mass representation there is no hole at all. These results are obtained with methods of analytic functions of several complex variables. 相似文献
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Presented by A. F. Pixley. 相似文献
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《Chaos, solitons, and fractals》2001,12(6):1101-1109
Two recent findings necessitate a closer look at the existing standard models of particle physics and cosmology. These are the discovery of neutrino oscillation, and hence a non-zero mass on the one hand and, on the other, observations of distant supernovae which indicate that contrary to popular belief, the universe would continue to expand for ever, possibly accelerating in the process. In this paper it is pointed out that relatively recent studies which indicate a stochastic, quantum vacuum underpinning and a fractal structure for space time, reconcile both of the recent observations, harmoniously. 相似文献
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Juan Elias 《Transactions of the American Mathematical Society》1999,351(10):4027-4042
For a dimensional Cohen-Macaulay local ring we study the depth of the associated graded ring of with respect to an -primary ideal in terms of the Vallabrega-Valla conditions and the length of , where is a minimal reduction of and . As a corollary we generalize Sally's conjecture on the depth of the associated graded ring with respect to a maximal ideal to -primary ideals. We also study the growth of the Hilbert function.
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For a Riesz operator T on a reflexive Banach space X with nonzero eigenvalues
denote by E(λi; T) the eigen-projection corresponding to an eigenvalue λi. In this paper we will show that if the operator sequence
is uniformly bounded, then the Riesz operator T can be decomposed into the sum of two operators Tp and Tr: T = Tp + Tr, where Tp is the weak limit of Tn and Tr is quasi-nilpotent. The result is used to obtain an expansion of a Riesz semigroup T(t) for t ≥ τ. As an application, we consider the solution of transport equation on a bounded convex body. 相似文献