广义毕达哥拉斯正态模糊集成算子及其决策应用

将毕达哥拉斯模糊数与直觉正态模糊数相结合,提出了毕达哥拉斯正态模糊数,研究了其运算和运算性质,定义了毕达哥拉斯正态模糊数的得分函数和精确函数,实现其大小排序.然后,针对毕达哥拉斯正态模糊信息的集成问题,提出毕达哥拉斯正态模糊有序加权平均(PNFOWA)算子、广义有序加权平均(GPNFOWA)算子和毕达哥拉斯正态模糊有序加权几何平均(PNFOWGA)算子及广义有序加权几何平均(GPNFOWGA)算子,并研究了其性质.最后,提出基于广义毕达哥拉斯正态模糊集成算子的多属性决策方法,并通过实例说明该方法的有效性.     

Pythagorean三角模糊语言Hamacher集结算子及其应用

在Pythagorean模糊集和Hamacher集结算子基础上,研究了Pythagorean三角模糊语言环境下的Hamacher集成算子问题。首先给出了Pythagorean三角模糊语言的定义、运算规则、得分函数、精确函数;其次,介绍了一系列关于Pythagorean三角模糊语言Hamacher集结算子,比如Pythagorean三角模糊语言Hamacher加权平均算子(PTrFLHWA)、Pythagorean三角模糊语言Hamacher加权几何平均算子(PTrFLHWG)等,并研究其具有的性质;之后,提出了两种决策方法来解决Pythagorean三角模糊语言信息环境下的多属性群决策问题;最后,用示例验证所给方法的有效性。     

基于灰色关联法和HA算子的Pythagorean模糊群决策方法

针对Pythagorean模糊群决策问题,提出一种基于Pythagorean模糊混合平均算子的决策方法。首先,提出一种基于Pythagorean模糊信息及其运算法则的Pythagorean模糊混合平均算子;其次,构建一种基于最大熵模型的属性位置权重定权方法,同时根据灰色关联方法提出一种属性客观权重计算方法,进而获得Pythagorean模糊混合平均算子的定权方法;利用Pythagorean模糊混合平均算子对单决策者信息进行融合,通过Pythagorean模糊加权平均算子对各专家信息进行融合,并依据得分函数与精确函数进行排序择优;最后,通过一个算例说明该方法的有效性和可行性。     

Pythagorean模糊Hamacher算子及其应用分析

基于Pythagorean模糊环境下的信息集成算子很少见,本文探讨Pythagorean模糊Hamacher集结算子问题,具有一定的理论价值。首先,定义Hamacher算子在Pythagorean模糊环境下的运算规则;之后,给出几种Pythagorean模糊Hamacher信息集结算子,比如,Pythagorean模糊Hamacher算术平均算子,广义Pythagorean模糊Hamacher算术平均算子等,并研究其具有的性质,包括单调性、幂等性、有界性;之后,提出两种不同决策方法来解决Pythagorean模糊信息环境下的多属性群决策问题;最后,通过示例验证所提出方法的可行性和实用性。     

诱导型广义Pythagorean模糊Choquet积分算子及群决策应用

主要目的研究决策信息为Pythagorean模糊数,决策属性间存在相互关联的多属性群决策问题。首先,基于Pythagorean模糊数运算和Choquet积分,提出了诱导型广义Pythagorean模糊Choquet积分(I-GPFCI)算子。然后,探讨了I-GPFCI算子的相关性质及一些特例,并给出了基于I-GPFCI算子的多属性群决策方法。最后,通过算例分析说明I-GPFCI算子在群决策应用中的有效性和可行性。     

毕达哥拉斯模糊幂平均算子

将幂平均算子应用到毕达哥拉斯模糊决策环境中,定义了毕达哥拉斯模糊幂平均算子(PFPA)、毕达哥拉斯模糊幂有序加权平均算子(PFPOWA)、毕达哥拉斯模糊幂几何算子(PFPG)和毕达哥拉斯模糊幂有序加权几何算子(PFPOWG),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幂平均算子的决策方法,并通过实例说明了其可行性与有效性。     

毕达哥拉斯三角模糊数集成算子及其决策应用

将毕达哥拉斯模糊数与三角模糊数相结合,提出了毕达哥拉斯三角模糊数的概念,定义了其运算,研究了其运算规律,推广了直觉三角模糊数和毕达哥拉斯模糊数,并通过定义毕达哥拉斯三角模糊数的得分函数和精确函数,实现毕达哥拉斯三角模糊数的排序。然后,定义了毕达哥拉斯三角模糊数加权平均算子(PTFWA)和有序加权平均算子(PTFOWA)、毕达哥拉斯三角模糊数加权几何算子(PTFWG)和有序加权几何算子(PTFOWG)以及毕达哥拉斯三角模糊数混合平均算子(PTFHA)和混合几何算子(PTFHG),研究了它们的性质,并给出其计算公式。最后,提出了基于毕达哥拉斯三角模糊集成算子的决策方法,通过实例说明了其可行性。     

基于IOWC-GOWMA算子和指数支撑度的区间型组合预测模型北大核心

将连续区间的广义有序加权多重平均(C-GOWMA)算子和诱导有序加权平均(IOWA)算子相结合,提出一种新的诱导有序加权连续区间广义有序加权多重平均(IOWC-GOWMA)算子,该算子同时考虑区间数自身、数据位置两个因素,可以将区间数转换成实参数,进一步构建基于IOWC-GOWMA算子和指数支撑度的区间型组合预测模型。最后通过实例分析说明该区间组合预测模型的合理性和有效性,并对参数进行了详细的灵敏度分析。     

直觉正态模糊数幂均算子及其决策应用

将幂均算子推广到直觉正态模糊数决策环境中。定义了直觉正态模糊数的运算,研究了运算性质。在此基础上,提出直觉正态模糊数幂均(INFPA)算子、有序加权幂均(INFPOWA)算子、广义直觉正态模糊数幂均(GINFPA)算子和广义有序加权幂均(GINFPOWA)算子,分析了GINFPA算子的特殊形式并研究其性质。针对属性值为直觉正态模糊数的多属性决策问题,提出基于GINFPA算子的决策方法。最后,通过一个算例说明决策方法的有效性和可行性。     

直觉模糊交叉影响Choquet积分算子及其决策应用

直觉模糊Choquet积分集成算子能有效解决属性关联的直觉模糊决策问题,直觉模糊数交叉影响运算能反映出不同直觉模糊数的隶属度和非隶属度之间的交叉影响.通过将直觉模糊Choquet积分平均算子与直觉模糊数交叉影响运算相结合,定义了直觉模糊交叉影响Choquet积分集成算子,包括直觉模糊交叉影响Choquet积分平均算子(IFICIA)和直觉模糊交叉影响Choquet积分几何算子(IFICIG),推导出它们的计算公式,讨论了它们的性质.通过研究直觉模糊交叉影响Choquet积分集成算子的特殊形式,发现直觉模糊交叉加权平均算子(IFIWA)和有序加权平均算子(IFIOWA)、直觉模糊交叉加权几何算子(IFIWG)和有序加权几何算子(IFIOWG)等均为它们的特例。最后,提出了基于直觉模糊交叉影响Choquet积分集成算子的决策方法,通过决策实例说明其可行性和稳定性。     

Multi-criteria decision-making method based on normal intuitionistic fuzzy-induced generalized aggregation operator

Normal intuitionistic fuzzy numbers (NIFNs), which use normal fuzzy numbers to express their membership and non-membership functions, can reflect the evaluation information exactly in different dimensions. In this paper, we are committed to apply NIFNs to multi-criteria decision-making (MCDM) problems, and meanwhile some new aggregation operators are proposed, including normal intuitionistic fuzzy weighted arithmetic averaging operator, normal intuitionistic fuzzy weighted geometric averaging operator, normal intuitionistic fuzzy-induced ordered weighted averaging operator, normal intuitionistic fuzzy-induced ordered weighted geometric averaging operator and normal intuitionistic fuzzy-induced generalized ordered weighted averaging operator (NIFIGOWA). Based on the NIFIGOWA operator, an approach is introduced to solve MCDM problems where the criteria values are NIFNs and the criteria weight information is fixed. Finally, the proposed method is compared to the existing methods by virtue of a numerical example to verify its feasibility and rationality.     

Confidence levels based Pythagorean fuzzy aggregation operators and its application to decision-making process

Pythagorean fuzzy set, an extension of the intuitionistic fuzzy set which relax the condition of sum of their membership function to square sum of its membership functions is less than one. Under these environment and by incorporating the idea of the confidence levels of each Pythagorean fuzzy number, the present study investigated a new averaging and geometric operators namely confidence Pythagorean fuzzy weighted and ordered weighted operators along with their some desired properties. Based on its, a multi criteria decision-making method has been proposed and illustrated with an example for showing the validity and effectiveness of it. A computed results are compared with the aid of existing results.     

Multiple criteria decision making method based on normal interval‐valued intuitionistic fuzzy generalized aggregation operator

On the basis of the normal intuitionistic fuzzy numbers (NIFNs), we proposed the normal interval‐valued intuitionistic fuzzy numbers (NIVIFNs) in which the values of the membership and nonmembership were extended to interval numbers. First, the definition, the properties, the score function and accuracy function of the NIVIFNs are briefly introduced, and the operational laws are defined. Second, some aggregation operators based on the NIVIFNs are proposed, such as normal interval‐valued intuitionistic fuzzy weighted arithmetic averaging operator, normal interval‐valued intuitionistic fuzzy ordered weighted arithmetic averaging operator, normal interval‐valued intuitionistic fuzzy hybrid weighted arithmetic averaging operator, normal interval‐valued intuitionistic fuzzy weighted geometric averaging operator, normal interval‐valued intuitionistic fuzzy ordered weighted geometric averaging operator, normal interval‐valued intuitionistic fuzzy hybrid weighted geometric averaging operator, and normal interval‐valued intuitionistic fuzzy generalized weighted averaging operator, normal interval‐valued intuitionistic fuzzy generalized ordered weighted averaging operator, normal interval‐valued intuitionistic fuzzy generalized hybrid weighted averaging operator, and some properties of these operators, such as idempotency, monotonicity, boundedness, commutativity, are studied. Further, an approach to the decision making problems with the NIVIFNs is established. Finally, an illustrative example is given to verify the developed approach and to demonstrate its practicality and effectiveness. © 2015 Wiley Periodicals, Inc. Complexity 21: 277–290, 2016     

A multi-attribute group decision-making method based on weighted geometric aggregation operators of interval-valued trapezoidal fuzzy numbers

With respect to the multiple attribute group decision making problems in which the attribute values take the form of generalized interval-valued trapezoidal fuzzy numbers (GITFN), this paper proposed a decision making method based on weighted geometric aggregation operators. First, some operational rules, the distance and comparison between two GITFNs are introduced. Second, the generalized interval-valued trapezoidal fuzzy numbers weighted geometric aggregation (GITFNWGA) operator, the generalized interval-valued trapezoidal fuzzy numbers ordered weighted geometric aggregation (GITFNOWGA) operator, and the generalized interval-valued trapezoidal fuzzy numbers hybrid geometric aggregation (GITFNHGA) operator are proposed, and their various properties are investigated. At the same time, the group decision methods based on these operators are also presented. Finally, an illustrate example is given to show the decision-making steps and the effectiveness of this method.     

梯形直觉模糊数集成算子及在决策中的应用研究

在直觉模糊集理论基础上,用梯形模糊数表示直觉模糊数的隶属度和非隶属度,进而提出了梯形直觉模糊数;然后定义了梯形直觉模糊数的运算法则,给出了相应的证明,并基于这些法则,给出了梯形直觉模糊加权算数平均算子(TIFWAA)、梯形直觉模糊数的加权二次平均算子(TIFWQA)、梯形直觉模糊数的有序加权二次平均算子(TIFOWQA)、梯形直觉模糊数的混合加权二次平均算子(TIFHQA)并研究了这些算子的性质;建立了不确定语言变量与梯形直觉模糊数的转化关系,并证明了转化的合理性;定义了梯形直觉模糊数的得分函数和精确函数,给出了梯形直觉模糊数大小比较方法;最后提供了一种基于梯形直觉模糊信息的决策方法,并通过实例结果证明了该方法的有效性。     

基于交叉熵和Shapley值的犹豫模糊多属性决策方法

针对属性值以犹豫模糊集形式给出的多属性决策问题,将Shapley理论和模糊测度进行结合,提出了两种更加能全面融合信息的诱导型广义犹豫模糊混合Shapley平均(I-GHFHSA)算子和诱导型广义犹豫模糊混合Shapley几何(I-GHFHSG)算子,同时详细研究了它们的相关特性。这两种算子综合考虑了数据不同组合的重要性、数据间的关联性,以及数据位置之间的相互依赖性。考虑到有时会存在属性权重以及数据位置权重未知的多属性决策问题,将交叉熵理论和Shapley函数进行结合,建立了最优模糊测度确定模型。最后提出了一种基于I-GHFHSA算子和I-GHFHSG算子的犹豫模糊多属性决策方法,并通过实际案例验证了其可行性和合理性。     

Some interval-valued 2-tuple linguistic aggregation operators and application in multiattribute group decision making

This paper deals with multiattribute group decision making (MAGDM) problems with interval-valued 2-tuple linguistic information. First, we introduce some new aggregation operators, such as the interval-valued 2-tuple weighted geometric (IVTWG) operator, the interval-valued 2-tuple ordered weighted geometric (IVTOWG) operator, the generalized interval-valued 2-tuple weighted average (GIVTWA) operator and the generalized interval-valued 2-tuple ordered weighted average (GIVTOWA). Then, we discuss their desired properties and relationships among them. Furthermore, we put forward a new method to determine the weight vector of interval-valued 2-tuple aggregation operator based on the concept of degree of precision. Finally, a numerical example is provided to illustrate the efficiency of the proposed method in dealing with interval-valued 2-tuple linguistic information under multi-granular linguistic contexts.