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.     

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.     

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.     

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.     

直觉模糊幂Heronian平均算子及其在多属性决策中的应用

针对需要同时捕获变量个体间的关联性和整体均衡性的信息融合问题,本文在直觉模糊环境下,将Heronian平均算子和幂平均算子相结合,提出了直觉模糊幂Heronian平均算子和直觉模糊加权幂Heronian平均算子.新算子利用Heronian平均算子的交叉运算来体现变量的关联性,同时引入支撑度系数来挖掘信息的相对贴近度,从而在信息融合过程中体现整体性.此外,还探讨了新算子的一些优良性质和特例,并给出一种多属性决策方法.最后,通过算例验证了该方法的可行性与有效性.     

A multi-criteria decision making procedure based on interval-valued intuitionistic fuzzy bonferroni means

Inspired by the idea of Bonferroni mean, in this paper we develop an aggregation technique called the interval-valued intuitionistic fuzzy Bonferroni mean for aggregating interval-valued intuitionistic fuzzy information. We study its properties and discuss its special cases. For the situations where the input arguments have different importance, we then define a weighted interval-valued intuitionistic fuzzy Bonferroni mean, based on which we give a procedure for multi-criteria decision making under interval-valued intuitionistic fuzzy environments.     

基于证据理论的直觉梯形模糊IOWA算子及其应用

为解决信息不确定与信息不完全的不确定型决策问题,定义了基于证据理论的直觉梯形模糊诱导有序加权平均(DS-TrIFIOWA)算子.首先,介绍了直觉梯形模糊数及其相应的运算法则和集结算子.然后,基于证据理论和直觉梯形模糊数,并考虑到决策者观念特征,定义了DS-TrIFIOWA算子,分析并证明了该算子的性质,进而提出了一种基于DS-TrIFIOWA算子的不确定型决策方法.最后,利用算例对该方法的可行性和有效性进行了分析.     

Extension of the TOPSIS method based on prospect theory and trapezoidal intuitionistic fuzzy numbers for group decision making

Considering the decision maker＇s risk psychological factors and information ambiguity under uncertainty, a novel TOPSIS based on prospect theory （PT） and trapezoidal intuitionistic fuzzy numbers （YrIFNs） for group decision making is investigated, in which the criteria values and the criteria weights take the form of TrIFNs, and weights of decision makers are unknown. Firstly, distance measures for TrIFNs are used to induce value function under trapezoidal intuitionistic fuzzy environment. Secondly, the concepts of distance measures and trapezoidal intuitionistie fuzzy weighted averaging operator are employed to induce the weights of decision makers and thus the decision makers＇ options can be aggregated. Then the PT-based separation measures and relative closeness coefficient are defined and an algorithm for ranking alternatives under trapezoidal intuitionistic fuzzy environment is proposed. Finally, a numerical example further illustrates the practicality and effectiveness of the proposed TOPSIS method.     

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.     

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.     

Intuitionistic fuzzy hierarchical clustering algorithms

Intuitionistic fuzzy set (IFS) is a set of 2-tuple arguments, each of which is characterized by a mem-bership degree and a nonmembership degree. The generalized form of IFS is interval-valued intuitionistic fuzzy set (IVIFS), whose components are intervals rather than exact numbers. IFSs and IVIFSs have been found to be very useful to describe vagueness and uncertainty. However, it seems that little attention has been focused on the clus-tering analysis of IFSs and IVIFSs. An intuitionistic fuzzy hierarchical algorithm is introduced for clustering IFSs, which is based on the traditional hierarchical clustering procedure, the intuitionistic fuzzy aggregation operator, and the basic distance measures between IFSs: the Hamming distance, normalized Hamming, weighted Hamming, the Euclidean distance, the normalized Euclidean distance, and the weighted Euclidean distance. Subsequently, the algorithm is extended for clustering IVIFSs. Finally the algorithm and its extended form are applied to the classifications of building materials and enterprises respectively.     

基于关联的三角模糊数直觉模糊集成算子及其应用

针对三角模糊数直觉模糊信息下属性间存在关联使得已有集结算子失效的问题, 引入模糊测度的概念, 在三角直觉模糊数的运算法则基础上构建了基于关联的加权平均集成算子, 即三角模糊数直觉模糊关联有序加权平均R-TIOWA算子、三角模糊数直觉模糊关联加权几何平均R-TIWGA算子和三角模糊数直觉模糊关联有序加权几何平均R-TIOWGA算子, 探讨了上述算子的若干性质．并在此基础上构建一种属性值为三角模糊数直觉模糊数的多属性群决策方法．实例分析验证了该方法的可行性和有效性．     

基于混合型评价矩阵的多属性群决策方法

本文针对具有语言型、直觉模糊数和区间直觉模糊数三种评价信息的混合型多属性群决策问题, 提出一种基于属性权重和专家权重均未知的决策方法. 首先, 定义新的转换函数, 可将不同粒度的语言评价信息统一成区间直觉模糊数; 然后, 基于支持度确定未知属性权重, 并在综合考虑区间直觉模糊数熵值和相似度的基础上, 建立了一种新的专家权重确定模型; 在将混合型决策矩阵转换成区间直觉模糊决策矩阵后, 利用IIFWA算子依次集结个体决策矩阵, 从而得出方案集的排序. 最后, 应用在ERP选优问题中, 验证了方法的有效性.     

基于直觉模糊相似度的直觉模糊三支决策方法

针对现有直觉模糊相似度未考虑其隶属度和非隶属度的实践语义且在一些情形下可能出现"违反直觉"等问题,本文提出一种新直觉模糊相似测度,并将其引入直觉模糊决策系统中,定义了直觉模糊相似度下(α,β)-水平截集等概念,并给出相关性质.以粗糙隶属度为评价函数导出目标集的(α,β)-下、上近似集及其三个域.考虑到决策者不同风险态度,基于贝叶斯理论构建一种具有多风险偏好的直觉模糊三支决策模型,并获得决策规则,进而提出一种基于直觉模糊相似度的直觉模糊三支决策方法.最后,通过算例说明该方法的可行性和有效性.     

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.     

毕达哥拉斯模糊Hamacher集成算子及其决策应用

定义了毕达哥拉斯模糊Hamacher运算,包括毕达哥拉斯模糊Hamacher和,积,数乘以及幂等,并研究了这些运算的性质.然后,将毕达哥拉斯模糊Hamacher运算应用到了信息集成之中,提出了毕达哥拉斯模糊Hamacher加权平均算子(PFHWA),毕达哥拉斯模糊Hamacher有序加权平均算子(PFHOWA),毕达哥拉斯模糊Hamacher加权几何算子(PFHWG),以及毕达哥拉斯模糊Hamacher有序加权几何算子(PFHOWG),并分别研究了它们的性质.最后,提出了基于毕达哥拉斯模糊Hamacher集成算子的决策方法,并通过实例说明了决策方法的可行性与有效性.     

基于直觉模糊折扣算子的异类数据融合方法

异类数据作为不确定数据的类型之一,成为模式识别、多属性决策等问题中数据融合的难点。为此,以直觉模糊集为理论基础,本文提出一种异类数据的多属性融合方法。首先,定义一种新的直觉模糊数折扣算子及合成法则,证明了该算子与合成法则的基本性质。其次,定义异类数据之间的距离度量测度,基于灰关联方法,得到用于决策的系数矩阵,通过对备选方案证据的构造过程,生成直觉模糊数,基于直觉模糊熵,给出属性权重的计算方法。最后,根据直觉模糊数合成法则和比较法则,实现结果判定。仿真实验结果表明,所提方法能够有效地降低运算时间,得到正确的决策结果。     

模糊Bonferroni平均算子及在多准则群决策中的应用

在进行信息集成时,有时需要考虑输入变量之间的相互影响,而Bonferroni平均（Bonferroni mean, BM）算子正好具有这种优点。为了集成三角模糊数,提出模糊Bonferroni平均（fuzzy Bonferroni mean, FBM）算子,讨论它的几种特殊情形。在此基础上,提出模糊加权Bonferroni平均（fuzzy weighted Bonferroni mean, FWBM）算子和组合模糊加权Bonferroni平均（combined fuzzy weighted Bonferroni mean, C-FWBM）算子,同时研究它们的一些性质。针对决策信息以三角模糊数给出的决策问题,提出一种基于FWBM算子和C-FWBM算子的多准则决策方法。最后举例说明其在模糊多准则群决策中的应用,结果表明该方法是可行的。     

Dual hesitant fuzzy information aggregation with Einstein t-conorm and t-norm

Dual hesitant fuzzy set (DHFS) is a new generalization of fuzzy set (FS) consisting of two parts (i.e., the membership hesitancy function and the non-membership hesitancy function), which confronts several different possible values indicating the epistemic degrees whether certainty or uncertainty. It encompasses fuzzy set (FS), intuitionistic fuzzy set (IFS), and hesitant fuzzy set (HFS) so that it can handle uncertain information more flexibly in the process of decision making. In this paper, we propose some new operations on dual hesitant fuzzy sets based on Einstein t-conorm and t-norm, study their properties and relationships and then give some dual hesitant fuzzy aggregation operators, which can be considered as the generalizations of some existing ones under fuzzy, intuitionistic fuzzy and hesitant fuzzy environments. Finally, a decision making algorithm under dual hesitant fuzzy environment is given based on the proposed aggregation operators and a numerical example is used to demonstrate the effectiveness of the method.     

诱导广义区间值直觉不确定语言混合Shapley算子及在群决策中的应用

本文针对具有区间值直觉不确定语言信息的多属性群决策,定义了两个广义混合累积算子.它们不仅综合考虑了属性自身及序位置的重要性,同时考虑了它们各自间的交互作用.值得一提的是:许多区间值直觉不确定语言累积算子是本文所定义算子的特例.当权重信息不完全已知时,建立了关于专家集、属性集和相应序位置集合上最优模糊测的数学规划模型.基于所定义的算子和建立的数学模型,提出了一种新的区间值直觉不确定语言多属性群决策方法.最后,通过对一个城市图书馆空调系统的评价来说明所给方法的具体应用.