基于不完全权重信息下模糊多属性决策的供应链合作伙伴选择

针对属性权重完全未知或只有部分权重信息且属性值为三角模糊数的供应链合作伙伴选择问题,给出了一种模糊多属性决策方法.提出了一种基于置信度的定性指标的量化方法,通过求解最优化决策模型确定属性的权重,然后根据各方案到模糊理想点的相对贴近度的大小选择最优的合作伙伴.     

一种直觉模糊多属性群决策方法及其在群决策中的应用

对以直觉模糊数形式表示的信息和属性权重完全未知的多属性群决策问题进行了研究.提出了一种基于熵值的直觉模糊数距离测度方法,同时对传统的比较得分函数和精确函数的直觉模糊数排序方法进行了改进,定义了一种新的排序公式;进而利用此距离度量公式,引入到基于直觉模糊数之间距离的离差最大化方法中,确定属性的权重,提出了一种基于属性权重完全未知的直觉模糊多属性群决策方法.最后,将此方法运用在ERP选型中.     

一种基于散度的模糊数排序方法

引用一种距离测度及模糊数的权重面积,建立了一种基于散度的模糊数排序指标.新的排序指标不仅引入了两个参考对象,即两个模糊数的极大和极小(M),(N),同时还考虑了模糊数本身的影响和决策者的决策态度.排序方法不仅计算简单、易于操作,而且还具有良好的性质.算例分析表明本文所提出的排序方法在一定程度上克服了现有方法的缺陷.     

不确定多属性决策中的一种模糊赋权方法

研究了以三角模糊数给出属性权重的不确定多属性决策问题,提出了一种基于三角模糊数的赋权方法,并给出了决策模型.首先决策者将属性权重两两比较的结果用三角模糊数表示,构造三角模糊数互补判断矩阵.通过求解矩阵得到模糊权重.然后,集结各方案的模糊综合属性值,通过构造并求解可能度矩阵对方案进行排序.最后给出了一个应用实例.     

犹豫模糊动态灰靶决策方法

针对属性权重及阶段权重完全未知的犹豫模糊动态多属性决策问题,提出一种考虑决策信息无量纲化的动态决策方法.首先,基于变异系数提出一种新的决策群体分歧度.并基于这种分歧度建立属性权重确定模型;其次,根据数据的平均年龄及各阶段决策信息间相关关系,提出一种阶段权重确定方法.然后,将灰靶决策方法推广到犹豫模糊环境下,并基于模糊聚类算法思想对方案进行排序.最后,给出算例说明方法可行性.     

权重完全未知下基于投影的犹豫模糊多属性群决策方法及应用

旨在犹豫模糊环境下,针对属性权重和专家权重完全未知的情形,提出了一种基于投影的犹豫模糊多属性群决策方法.首先,根据改进的犹豫模糊熵结合均熵求得决策者的客观权重,利用熵最小化原则与犹豫模糊指数熵确定评价属性的权重.接着,利用犹豫模糊加权算术平均算子对个体犹豫模糊决策矩阵进行集结,构建并求解出每个方案在正、负理想方案上的投影.然后,通过计算相对贴近度实现方案的排序和择优.最后,把该决策方法应用在应急救援路径选择问题上,进而验证了所提群决策方法的可行性与有效性.     

模糊偏好下多目标群体决策的一种客观赋权方法

对具有模糊偏好的多目标群体决策问题,给出了模糊决策矩阵规范化公式,建立了确定各目标权重的优化模型,提出了一种客观赋权方法,为模糊偏好的多目标群体决策提供了一种简单实用的可靠方法,该方法具有确定权重的客观性和科学性等特点,计算简便,用途广泛.最后通过一个算例说明了该方法的实用性和有效性.     

基于新型区间直觉三角模糊熵的多属性决策方法

在进行区间直觉模糊多属性决策时,有时属性权重是未知的,针对这一问题,提出一种新型区间直觉三角模糊熵的决策方法.首先,给出该新型区间直觉三角模糊熵定义和相关定理,应用该区间直觉三角模糊熵确定属性的权重.然后,基于逼近理想解排序法(TOPSIS)的思想,采用改进的加权欧几里得距离,进行区间直觉模糊群决策,并给出决策步骤.最后,将该方法应用在供应链选择的群决策问题中,通过算例实验验证了该方法的有效性与可行性.     

带有方案优先序的模糊多属性决策方法

针对属性值为模糊变量,属性权重完全未知但已知方案优先序的模糊多属性决策问题给出一种新的决策方法.该方法通过建立一个线性目标规划模型来确定属性的权重,再基于简单加权平均法则来计算各方案的模糊综合属性值,然后根据比较模糊变量大小的期望值方法对方案进行排序.最后给出了应用实例.     

基于前景理论的VIKOR犹豫模糊多属性决策方法研究

针对属性权重未知,且属性值为犹豫模糊的问题提出了一种基于前景理论的VIKOR犹豫模糊多属性决策方法.首先,从方案和属性两个角度切入,以犹豫模糊数均值,方差和非明确熵构建多目标优化模型来确定权重;然后,通过犹豫模糊Euclidean距离定义了犹豫模糊环境下的前景价值函数,确定中位数参考点以及各个方案在各个属性下的综合前景值;最后,通过前景价值矩阵给出基于多准则妥协优化解(VIKOR)的方案排序,通过实证分析验证了方法的有效性和可行性.     

On the nearest parametric approximation of a fuzzy number

Many nearest parametric approximation methods of fuzzy sets are proposed in the literature. It is clear that the specific approximations may lead to the loss of information about fuzziness. To overcome this problem, most of these methods rely on the minimization of the distance between the original fuzzy set and its approximation. But these approximations mostly are not flexible to the decision maker's choice. Hence, in this paper, we offer a parametric fuzzy approximation method based on the decision maker's strategy as an extension of trapezoidal approximation of a fuzzy number. This method comprises the selection of the form of the parametric membership function and its evaluation.     

Selecting IS personnel use fuzzy GDSS based on metric distance method

In this paper we propose a new approach to rank fuzzy numbers by metric distance. For showing our method is a good ranking method, we give two examples to compare with other methods. The paper also developes a computer-based group decision support system, FMCGDSS, to increase the recruiting productivity and to easily compare our method with other fuzzy number ranking methods. The FMCGDSS includes three ranking methods: intuition ranking, Lee and Li's fuzzy mean/spread and our metric distance method to help manager make better decision under fuzzy circumstance. The result indicates that the new method is coincident with the intuition ranking and the Lee and Li's fuzzy mean/spread method on each type weight.     

多目标多维模糊决策模型的模糊交叉算法

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。     

Fuzzy AHP中的一种加权群体决策方法

考虑在一些群体决策问题中,由于决策者个人的经验、才知、权力等因素的不同,因而拥有不同决策权重的情况,提出Fuzzy环境中层次分析法的一种加权群体决策模型,同时还给出由Fuzzy判断矩阵计算被比较元素的Fuzzy排序权重的几种方法,并给出一个应用该群体决策模型的例子。     

Fuzzy multi-criteria decision-making based on positive and negative extreme solutions

To encompass decision data vagueness, many researchers generalized multi-criteria decision-making (MCDM) methods in certain environment into fuzzy multi-criteria decision-making (FMCDM) methods under fuzzy environment. In these FMCDM methods, ranking fuzzy numbers based on fuzzy pair-wise comparison is normally essential, but the comparison is a complexity work. To avoid fuzzy pair-wise comparison, we propose a FMCDM method based on positive and negative extreme solutions of alternatives. In the proposed method, two extreme solutions of alternatives are obtained by MAX and MIN operations of fuzzy TOPSIS. Then weakness and strength matrices between alternatives and extreme solutions are derived by a difference function revised from fuzzy preference relation of Lee, and multiplied with weight matrix to be weighted weakness and strength indices. The two weighted indices are respectively transferred into positive and negative indices, and then the two indices integrated into a total performance index. Finally, alternatives can be sorted according to their related performance indices, and FMCDM problems are easily solved, not by fuzzy pair-wise comparison.     

基于犹豫毕达哥拉斯模糊环境下的TODIM方法

在决策过程中TODIM方法能有效的捕捉决策者的心理行为。犹豫毕达哥拉斯模糊集不但能反映正反两个方面的不确定性,而且能反映决策者的犹豫程度。本文将TODIM方法扩展到犹豫毕达哥拉斯模糊集。首先定义了犹豫毕达哥拉斯模糊环境下的测量函数,用于比较两个犹豫毕达哥拉斯模糊数的大小,其次计算每个备选方案相对其它备选方案的相对优势度,然后根据相对优势度选出最佳方案。最后,用航空公司服务质量的评估来说明本文给出方法的可行性和有效性。     

模糊多属性决策的三种结构元方法

将结构元理论引入到模糊多属性决策中,按照经典多属性决策的乐观型准则、悲观型准则和乐观-悲观结合型准则,对应地建立了基于模糊结构元理论的模糊乐观型、模糊悲观型、模糊乐观-悲观结合型决策方法。借助一个实例,本文运用这三种算法进行了决策,得出了和传统决策算法一致的结论。本文提出的算法不仅易于理解,而且计算的速度也远比传统算法要快,对于进一步研究模糊多属性决策问题有很好的参考作用。     

A new method for ranking fuzzy numbers and its application to group decision making

In this paper, a new method for comparing fuzzy numbers based on a fuzzy probabilistic preference relation is introduced. The ranking order of fuzzy numbers with the weighted confidence level is derived from the pairwise comparison matrix based on 0.5-transitivity of the fuzzy probabilistic preference relation. The main difference between the proposed method and existing ones is that the comparison result between two fuzzy numbers is expressed as a fuzzy set instead of a crisp one. As such, the ranking order of n fuzzy numbers provides more information on the uncertainty level of the comparison. Illustrated by comparative examples, the proposed method overcomes certain unreasonable (due to the violation of the inequality properties) and indiscriminative problems exhibited by some existing methods. More importantly, the proposed method is able to provide decision makers with the probability of making errors when a crisp ranking order is obtained. The proposed method is also able to provide a probability-based explanation for conflicts among the comparison results provided by some existing methods using a proper ranking order, which ensures that ties of alternatives can be broken.     

On the extent analysis method for fuzzy AHP and its applications

In a paper by Chang [D.Y. Chang, Applications of the extent analysis method on fuzzy AHP, European Journal of Operational Research 95 (1996) 649–655], an extent analysis method on fuzzy AHP was proposed to obtain a crisp priority vector from a triangular fuzzy comparison matrix. It is found that the extent analysis method cannot estimate the true weights from a fuzzy comparison matrix and has led to quite a number of misapplications in the literature. In this paper, we show by examples that the priority vectors determined by the extent analysis method do not represent the relative importance of decision criteria or alternatives and that the misapplication of the extent analysis method to fuzzy AHP problems may lead to a wrong decision to be made and some useful decision information such as decision criteria and fuzzy comparison matrices not to be considered. We show these problems to avoid any possible misapplications in the future.     

基于粗糙集的模糊决策算法

给出一种从连续决策表中提取模糊决策规则的规则提取算法。首先,转化连续属性值为模糊值;然后,给出两个不同对象的模糊属性值关于相应连续属性的相似度;其次,给出了λ相似关系与λ相似类的定义。根据λ相似关系,给出粗糙-模糊空间中的下近似与上近似概念;最后,结合模糊集与粗糙集理论的思想,给出一种从连续值域决策表获取决策规则的算法,并通过实例说明该算法的有效性。