直觉正态模糊优先集结算子及其在群决策中的应用

直觉正态模糊数是对直觉模糊数和正态模糊数的拓展.针对直觉正态模糊信息的集成问题,定义了直觉正态模糊数的运算法则、期望值和大小比较方法,提出了准则间具有优先关系的直觉正态模糊优先加权平均算子(INFPWA)、直觉正态模糊优先加权几何平均算子(INFPWG)、直觉正态模糊有序加权平均算子(INFPOWA)及这些算子的性质.在此基础上,针对专家和准则间具有优先关系并且准则值为直觉正态模糊数的多准则决策问题,提出一种基于直觉正态模糊优先集结算子的群决策方法.最后通过算例分析验证了该方法的有效性和可行性.     

直觉不确定语言集成算子及在群决策中的应用

直觉不确定语言数是直觉模糊数和不确定语言变量值的拓展. 针对直觉不确定语言信息的集成问题, 定义了直觉不确定语言数运算法则和大小比较方法, 提出了直觉不确定语言的加权算术平均算子(IULWAA)、直觉不确定语言的有序加权平均算子(IULOWA)以及直觉不确定语言的混合加权平均算子(IULHA)及这些算子的性质. 在此基础上, 提出一种属性权重确知且属性值以直觉不确定语言数形式给出的多属性群决策方法. 最后通过实例分析证明了该方法的有效性.     

基于纯语言混合几何平均算子的多属性群决策方法

在纯语言加权几何平均(PLWGA)算子和推广的有序加权平均(EOWA)算子基础上给出纯语言混合几何平均(PLHGA)算子,研究了专家权重、属性权重及属性值均以语言形式给出的纯语言多属性群决策问题,提出了一种纯语言多属性群决策方法。最后将该方法应用于解决虚拟企业中的战略合作伙伴选择问题。     

基于三角模糊数犹豫直觉模糊集的多属性智能决策

通过剖析现实生活中数据对象复杂性以及决策人思考的犹豫模糊性,提出了基于三角模糊数的犹豫直觉模糊集决策方法。首先,给出了三角模糊数犹豫直觉模糊集的定义,构建并证明了三角犹豫直觉模糊元及模糊数的基本运算法则和集成算子。其次,通过对三角犹豫直觉模糊元的得分函数和精确函数的定义,实现了三角犹豫直觉模糊数下的对象间的取值比较,针对三角犹豫直觉模糊数下多属性决策分析中的不确定性权重求解难题,提出了一种基于得分函数和最大熵理论的最优权重求解模型,并构建遗传算法模型实施最优化求解。最后,给出了三角犹豫直觉模糊数下的多属性智能决策算法,并以算例证明了所提方法的可行性和有效性。     

基于犹豫直觉模糊数的多属性决策方法

综合犹豫模糊集和直觉模糊集,提出犹豫直觉模糊集。针对犹豫直觉模糊集中不同元素对应的犹豫直觉模糊数,定义其基本运算法则。基于运算法则,设计犹豫直觉模糊数的加权几何和加权算术集成算子。构建犹豫直觉模糊数的得分函数和精确函数,实现不同犹豫直觉模糊数间的比较。考虑犹豫直觉模糊数的集成算子和比较方法,提出相应的多属性决策方法,并将此方法应用于混合云存储服务供应商的选择,阐释方法的应用性与有效性。     

一种FOWG算子及其在模糊AHP中的应用

给出了三角模糊数两两比较的可能度公式 ,研究了它的一些优良性质。基于可能度公式 ,提出了一种模糊有序加权几何平均 (FOWG)算子。利用该算子对模糊AHP中以三角模糊数判断矩阵形式给出的判断信息进行了集结 ,而且 ,基于FOWG算子及互补判断矩阵的排序公式 ,给出了一种对决策方案进行排序和择优的算法。最后通过算例说明了该方法的有效性和实用性。     

三参数区间数据信息集成算子及其在决策中的应用

研究了三参数区间数据信息的集成问题.基于连续区间数据有序加权平均(C-OWA)算子和有序加权几何(C-OWG)算子,定义了连续三参数区间数据有序加权平均(CP-OWA)算子和有序加权几何(CP-OWG)算子,并将这两种算子进行拓展,提出了加权的CP-OWA(WCP-OWA)算子和加权的CP-OWG(WCP-OWG)算子,研究了它们的一些性质.基于这些算子,提出了一种属性权重和属性值均以三参数区间数形式给出的不确定多属性决策方法,该方法利用CP-OWA算子对三参数区间数属性权重进行处理,利用WCP-OWA算子或WCP-OWG算子对三参数区间数属性值进行集成.最后,进行了实例分析.     

区间直觉模糊幂加权算子的动态多属性决策

为了解决集结算子处理动态多属性决策问题时,现有的区间直觉模糊(interval valued intuitionistic fuzzy, IVIF)加权平均算子未考虑集结数据之间的相互关系、决策结果精度不高的不足,利用幂加权几何平均(power weighted geometric average,PWGA)算子的非线性特性将集结数据之间相互关系联系起来,提出了IVIF PWGA算子的动态多属性决策方法。首先,将实数形式的PWGA算子扩展到区间直觉模糊集(IVIF set,IVIFS),利用数学归纳法证明了数据融合后的综合集结值是区间直觉模糊数(interval valued intuitionistic fuzzy number, IVIFN)的结论。然后,定义了IVIF条件下,处理动态多属性决策问题的PWGA算子。通过动态PWGA算子集结多个时间点的单一集结值得到综合集结值,根据综合集结值的得分函数和精确函数,对各方案排序。最后,通过实例说明了该算法的有效性。     

基于直觉正态模糊集结算子的多准则决策方法

定义了直觉正态模糊数及其运算法则、Euclidean距离、直觉正态模糊加权算术平均算子和直觉正态模糊加权几何平均算子. 针对准则值为直觉正态模糊数而权重信息不完全的多准则决策问题, 提出了一种基于直觉正态模糊集结算子的决策方法. 该方法首先利用各方案之间的距离和最小化思想建立优化模型求得最优权重, 然后利用集结算子对各准则进行集结, 从而得到各方案的综合评价值, 最后通过比较它们跟正负理想方案间的相对贴近度的大小, 得到方案集的排序. 实例表明该方法的有效性和可行性.     

一种不确定型OWGA算子及其在决策中的应用

把有序加权几何平均(OWGA)算子推广到所给定的数据信息均为区间数形式的不确定环境之中,基于区间数两两比较的可能度公式和模糊互补判断矩阵公式,提出了一种不确定有序加权几何平均(UOWEGA)算子,给出了其在应用过程中的具体步骤,并提出了一种相应的集结决策信息的方法。最后通过算例说明了方法的可行性和有效性。     

Aggregation and decision making using intuitionistic multiplicative triangular fuzzy information

The intuitionistic triangular fuzzy set is a generalization of the intuitionistic fuzzy set. In practical applications, we find that the results derived by using the traditional intuitionistic triangular fuzzy aggregation operators based on intuitionistic triangular fuzzy sets are sometimes inconsistent with intuition. To overcome this issue, based on the [1/9, 9] scale, we define the concepts of intuitionistic multiplicative triangular fuzzy set and intuitionistic multiplicative triangular fuzzy number, and then we discuss their operational laws and some desirable properties. Based on the operational laws, we develop a series of aggregation operators for intuitionistic multiplicative triangular fuzzy information, and then apply them to propose an approach to multi-attribute decision making under intuitionistic fuzzy environments. Finally, we use a practical example involving the evaluation of investment alternatives of an investment company to demonstrate our aggregation operators and decision making approach.     

Interval-valued intuitionistic fuzzy aggregation operators

The notion of the interval-valued intuitionistic fuzzy set (IVIFS) is a generalization of that of the Atanassov’s intuitionistic fuzzy set. The fundamental characteristic of IVIFS is that the values of its membership function and non-membership function are intervals rather than exact numbers. There are various averaging operators defined for IVIFSs. These operators are not monotone with respect to the total order of IVIFS, which is undesirable. This paper shows how such averaging operators can be represented by using additive generators of the product triangular norm, which simplifies and extends the existing constructions. Moreover, two new aggregation operators based on the ukasiewicz triangular norm are proposed, which are monotone with respect to the total order of IVIFS. Finally, an application of the interval-valued intuitionistic fuzzy weighted averaging operator is given to multiple criteria decision making.     

Linear goal programming approach to obtaining the weights of intuitionistic fuzzy ordered weighted averaging operator

The multiple attribute decision making problems are studied, in which the information about attribute weights is partly known and the attribute values take the form of intuitionistic fuzzy numbers. The operational laws of intuitionistic fuzzy numbers are introduced, and the score function and accuracy function are presented to compare the intuitionistic fuzzy numbers. The intuitionistic fuzzy ordered weighted averaging (IFOWA) operator which is an extension of the well-known ordered weighted averaging (OWA) operator is investigated to aggregate the intuitionistic fuzzy information. In order to determine the weights of intuitionistic fuzzy ordered weighted averaging operator, a linear goal programming procedure is proposed for learning the weights from data. Finally, an example is illustrated to verify the effectiveness and practicability of the developed method.     

Aggregation operators on intuitionistic trapezoidal fuzzy number and its application to multi-criteria decision making problems

Intuitionistic trapezoidal fuzzy numbers and their operational laws are defined. Based on these op-erational laws, some aggregation operators, including intuitionistic trapezoidal fuzzy weighted arithmetic averaging operator and weighted geometric averaging operator are proposed. Expected values, score function, and accuracy function of intuitionitsic trapezoidal fuzzy numbers are defined. Based on these, a kind of intuitionistic trapezoidal fuzzy multi-criteria decision making method is proposed. By using these aggregation operators, criteria values are aggregated and integrated intuitionistic trapezoidal fuzzy numbers of alternatives are attained. By comparing score function and accuracy function values of integrated fuzzy numbers, a ranking of the whole alternative set can be attained. An example is given to show the feasibility and availability of the method.     

Some new similarity measures for intuitionistic fuzzy values and their application in group decision making

We first propose a series of similarity measures for intuitionistic fuzzy values (IFVs) based on the intuitionistic fuzzy operators (Atanassov 1995). The parameters in the proposed similarity measures can control the degree of membership and the degree of non-membership of an IFV, which can reflect the decision maker’s risk preference. Moreover, we can obtain some known similarity measures when some fixed values are assigned to the parameters. Furthermore, we apply the similarity measures to aggregate IFVs and develop some aggregation operators, such as the intuitionistic fuzzy dependent averaging operator and the intuitionistic fuzzy dependent geometric operator, whose prominent characteristic is that the associated weights only depend on the aggregated intuitionistic fuzzy arguments and can relieve the influence of unfair arguments on the aggregated results. Based on these aggregation operators, we develop some group decision making methods, and finally extend our results to interval-valued intuitionistic fuzzy environment.     

基于直觉梯形模糊信息的多准则群决策方法

针对现有直觉梯形模糊数算术运算的不足, 提出新的直觉梯形模糊数的算术运算. 在此基础上, 定义了直觉梯形模糊数的几种集结算子, 讨论了这些算子的性质, 并将直觉梯形模糊集结算子用于群决策中, 提出了相应的多准则群决策方法. 最后通过算例分析验证所提方法 的有效性与合理性.