基于隶属度与非隶属度交叉影响的直觉模糊集运算法则及其应用

考虑到不同直觉模糊集的隶属度与非隶属度之间可能存在着某些关联和相互影响,本文提出了直觉模糊集上的改进的加法运算、数乘运算、乘积运算和幂运算.在这些运算的基础上,我们重新给出了直觉模糊加权算术平均算子、直觉模糊有序加权算术平均算子、直觉模糊加权几何平均算子和直觉模糊有序加权几何平均算子的表达式,并研究了他们的一些性质.最后通过实例,说明了新的集成算子在决策应用中的有效性.     

关于三角模的直觉模糊群及其同态像

本文在K．Atanassov引进的直觉模糊集概念的基础上，利用T模和S模，定义了两个直觉模糊集的乘积．给出了关于三角模的直觉模糊群的概念及其等价命题，最后在两个经典群同态与同构意义下，研究了这种直觉模糊群的同态像及原像等问题。     

直觉模糊集运算性质

针对Atanassov(Intuitionistic Fuzzy Sets. Heidelberg: Springer,1999)给出的直觉模糊集运算,指出并修正一些直觉模糊集运算的错误性质,这将有利于对直觉模糊集的进一步研究.     

模糊数直觉模糊集

定义一种新的模糊数直觉模糊集,同时给出了它的一些运算,并讨论了它与直觉模糊集、区间值直觉模糊集的关系。     

关于区间值直觉模糊集运算性质的注记

针对Atanassov[3]给出的区间值直觉模糊集运算,指出并修正一些区间值模糊集运算的错误性质,有利于以区间值直觉模糊集的进一步研究。     

双枝模糊集与直觉模糊集的关系(II)——截集

就双枝模糊集的截集定义和运算与直觉模糊集的水平截集定义和运算进行了比较和讨论,对于它们不同的地方我们通过重新定义直觉模糊集的水平截集概念使得双枝模糊集的截集和运算能几乎完全地统一到直觉模糊集的水平截集和运算上来.从而需要用双枝模糊集解决的问题也就进一步可以用直觉模糊集来解决了.     

双枝模糊集与直觉模糊集的关系（Ⅱ）——截集

就双枝模糊集的截集定义和运算与直觉模糊集的水平截集定义和运算进行了比较和讨论,对于它们不同的地方我们通过重新定义直觉模糊集的水平截集概念使得双枝模糊集的截集和运算能几乎完全地统一到直觉模糊集的水平截集和运算上来。从而需要用双枝模糊集解决的问题也就进一步可以用直觉模糊集来解决了。     

模糊集乘积的扩张运算

在Zadeh的模糊集概念基础上,给出模糊集乘积同态映射的概念;其次,讨论模糊集乘积的性质;然后根据扩张原理,在模糊集乘积同态、同构映射的条件下,研究模糊集乘积与模糊集乘积同态像之间的关系.     

模糊数直觉模糊集运算的模糊结构元表示

在文[4]提出的模糊数直觉模糊集定义的基础上,将文[2]和[7]定义的区间值直觉模糊集运算推广到模糊数直觉模糊集中.利用模糊数的结构元表示方法,得到了模糊数直觉模糊集运算的简便的结构元表示形式,同时给出这些运算的相关性质及证明.     

基于IOWHA算子的直觉模糊多属性决策方法及其应用

对于直觉模糊(IFS)环境下的多属性决策问题,引进了诱导有序加权调和平均算子(IOWHA),然后构建了直觉模糊集之间的运算关系,提出了直觉模糊集的逆的概念,继而得出能集结直觉模糊集的IOWHA算子并给出其在TOPSIS决策方法中的应用,实证分析的结果表明该方法有效、可行.     

Extension principles for interval-valued intuitionistic fuzzy sets and algebraic operations

The Atanassov’s intuitionistic fuzzy (IF) set theory has become a popular topic of investigation in the fuzzy set community. However, there is less investigation on the representation of level sets and extension principles for interval-valued intuitionistic fuzzy (IVIF) sets as well as algebraic operations. In this paper, firstly the representation theorem of IVIF sets is proposed by using the concept of level sets. Then, the extension principles of IVIF sets are developed based on the representation theorem. Finally, the addition, subtraction, multiplication and division operations over IVIF sets are defined based on the extension principle. The representation theorem and extension principles as well as algebraic operations form an important part of Atanassov’s IF set theory.     

Multi-fuzzy sets: An extension of fuzzy sets

In this paper we propose a method to construct more general fuzzy sets using ordinary fuzzy sets as building blocks. We introduce the concept of multi-fuzzy sets in terms of ordered sequences of membership functions. The family of operations T, S, M of multi-fuzzy sets are introduced by coordinate wise t-norms, s-norms and aggregation operations. We define the notion of coordinate wise conjugation of multifuzzy sets, a method for obtaining Atanassov’s intuitionistic fuzzy operations from multi-fuzzy sets. We show that various binary operations in Atanassov’s intuitionistic fuzzy sets are equivalent to some operations in multi-fuzzy sets like M operations, 2-conjugates of the T and S operations. It is concluded that multi-fuzzy set theory is an extension of Zadeh’s fuzzy set theory, Atanassov’s intuitionsitic fuzzy set theory and L-fuzzy set theory.     

直觉模糊群与它的同态像

在Ｋ,Ａｔａｎａｓｓｏｖ引进直觉模糊集的基础上,给出它的扩展原理,进而定义了直觉模糊群,并讨论了它的简单性质,最后在两个经典群同态与同构意义下,研究了这咱直觉模糊群的像、前像与逆映射等问题。     

直觉模糊正规子群与直觉模糊商群

在直觉模糊子群的基础上 ,引入直觉模糊正规子群与直觉模糊商群概念 ,并讨论了它们的一些性质 ,最后研究了群同态下 ,直觉模糊正规子群的对应关系     

直觉 Fuzzy集的基本定理

提出直觉 Fuzzy集的截集的概念 ,并详细讨论其基本性质 ,在此基础上建立直觉 Fuzzy集的一系列分解定理、表现定理与扩张原理 .     

直积群上几类直觉模糊子群及其投影

给出了直觉模糊子群的性质及其等价命题,并通过定义直觉模糊集的直积与投影,获得了直觉模糊直积群及直觉模糊投影子群,进而在直觉模糊标准子群的条件下,分别讨论了直积群上的直觉模糊正规子群、直觉模糊特征子群、直觉模糊共轭与其直觉模糊投影子群的关系.     

Rough intuitionistic fuzzy information systems

In this paper, we consider the notion of rough intuitionistic fuzzy sets and study their properties. We present an extension of rough set theory with the concept of intuitionistic fuzzy sets with several properties given. Moreover, we discuss the knowledge reduction of the classical Pawlak information systems and the intuitionistic fuzzy information systems, respectively.     

Information granulation and uncertainty measures in interval-valued intuitionistic fuzzy information systems

Information granulation and entropy are main approaches for investigating the uncertainty of information systems, which have been widely employed in many practical domains. In this paper, information granulation and uncertainty measures for interval-valued intuitionistic fuzzy binary granular structures are addressed. First, we propose the representation of interval-valued intuitionistic fuzzy information granules and examine some operations of interval-valued intuitionistic fuzzy granular structures. Second, the interval-valued intuitionistic fuzzy information granularity is introduced to depict the distinguishment ability of an interval-valued intuitionistic fuzzy granular structure (IIFGS), which is a natural extension of fuzzy information granularity. Third, we discuss how to scale the uncertainty of an IIFGS using the extended information entropy and the uncertainty among interval-valued intuitionistic fuzzy granular structures using the expanded mutual information derived from the presented intuitionistic fuzzy information entropy. Fourth, we discovery the relationship between the developed interval-valued intuitionistic fuzzy information entropy and the intuitionistic fuzzy information granularity presented in this paper.     

Some aspects of intuitionistic fuzzy sets

We first discuss the significant role that duality plays in many aggregation operations involving intuitionistic fuzzy subsets. We then consider the extension to intuitionistic fuzzy subsets of a number of ideas from standard fuzzy subsets. In particular we look at the measure of specificity. We also look at the problem of alternative selection when decision criteria satisfaction is expressed using intuitionistic fuzzy subsets. We introduce a decision paradigm called the method of least commitment. We briefly look at the problem of defuzzification of intuitionistic fuzzy subsets.