The Multi-Interval-Valued Fuzzy Soft Set with Application in Decision Making

In 1999, Molodtsov introduced the concept of soft set theory as a general mathematical tool for dealing with uncertainty. By combining the multi-fuzzy set and soft set models, Y. Yang, X. Tan and C. Meng introduced the concept of multi-fuzzy soft sets and studied some of its operations, such as complement, “AND”, “OR”, Union and Intersection. They also gave an algorithm to analyze a decision problem using multi-fuzzy soft set. In this paper, we introduce the concept of multi-interval-valued fuzzy soft set (M-IVFSS). We also define its basic operations, namely complement, union, intersection, AND and OR. Finally, we give an application of this concept in decision-making problem.

Fully implicational methods for approximate reasoning based on interval-valued fuzzy sets

The aim of this paper is to discuss the approximate rea- soning problems with interval-valued fuzzy environments based on the fully implicational idea. First, this paper constructs a class of interval-valued fuzzy implications by means of a type of impli- cations and a parameter on the unit interval, then uses them to establish fully implicational reasoning methods for interval-valued fuzzy modus ponens （IFMP） and interval-valued fuzzy modus tel- lens （IFMT） problems. At the same time the reversibility properties of these methods are analyzed and the reversible conditions are given. It is shown that the existing unified forms of α-triple I （the abbreviation of triple implications） methods for FMP and FMT can be seen as the particular cases of our methods for IFMP and IFMT.

Cartesian product over interval valued intuitionistic fuzzy sets

The intuitionistic fuzzy set(IFS) based on fuzzy theory,which is of high efficiency to solve the fuzzy problem, has been introduced by Atanassov. Subsequently, he pushed the research one step further from the IFS to the interval valued intuitionistic fuzzy set(IVIFS). On the basis of fuzzy set(FS), the IFS is a generalization concept. And the IFS is generalized to the IVIFS.In this paper, the definition of the sixth Cartesian product over IVIFSs is first introduced and its some properties are explored.We prove some equalities based on the operation and the relation over IVIFSs. Finally, we present one geometric interpretation and a numerical example of the sixth Cartesian product over IVIFSs.

Reliability Analysis of a Powerloom Plant Using Interval Valued Intuitionistic Fuzzy Sets

In this paper, we investigate the reliability analysis of a powerloom plant by using interval valued intuitionistic fuzzy sets (IVIFS). Herein, we modeled a powerloom plant as a gracefully degradable system having two units A(n) and B(m) connected in series. The reliability ofncomponents of unitAandmcomponents of unitBis assumed to be an IVIFS defined over the universe of discourse [0, 1]. Thus, the reliability of the system obtained is an IVIFS that covers the inherited uncertainty in data collection and reliability evaluation of a powerloom plant.

Interval-Valued Intuitionistic Fuzzy-Rough Sets

This paper combines interval-valued intuitionistic fuzzy sets and rough sets.It studies rougheness in interval-valued intuitionistic fuzzy sets and proposes one kind of interval-valued intuitionistic fuzzy-rough sets models under the equivalence relation in crisp sets.That extends the classical rough set defined by Pawlak.

A KIND OF FUZZY LINEAR PROGRAMMING PROBLEMS BASED ON INTERVAL-VALUED FUZZY SETS

The objective of this paper is to deal with a kind of fuzzy linear programming problem based on interval\|valued fuzzy sets (IVFLP) through the medium of procedure that turns IVFLP into parametric linear programming via the mathematical programming.Some useful results for the benefit of solving IVFLP are expounded and proved,developed and discussed.Furthermore,that the proposed techniques in this paper allow the decision\|maker to assign a different degree of importance can provide a useful way to efficiently help the decision\|maker make their decisions.

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 IVlFSs. 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 t.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.

Attribute Reduction in Interval and Set-Valued Decision Information Systems

In many practical situation, some of the attribute values for an object may be interval and set-valued. This paper introduces the interval and set-valued information systems and decision systems. According to the semantic relation of attribute values, interval and set-valued information systems can be classified into two categories: disjunctive (Type 1) and conjunctive (Type 2) systems. In this paper, we mainly focus on semantic interpretation of Type 1. Then, we define a new fuzzy preference relation and construct a fuzzy rough set model for interval and set-valued information systems. Moreover, based on the new fuzzy preference relation, the concepts of the significance measure of condition attributes and the relative significance measure of condition attributes are given in interval and set-valued decision information systems by the introduction of fuzzy positive region and the dependency degree. And on this basis, a heuristic algorithm for calculating fuzzy positive region reduction in interval and set-valued decision information systems is given. Finally, we give an illustrative example to substantiate the theoretical arguments. The results will help us to gain much more insights into the meaning of fuzzy rough set theory. Furthermore, it has provided a new perspective to study the attribute reduction problem in decision systems.

基于区间Pythagorean-PROMETHEE算法的水资源配置方案多属性群决策

为解决水资源配置方案选取困难、效率低的问题,提出一种基于区间Pythagorean-PROMETHEE算法的水资源配置方案多属性群决策方法。首先,构建各决策专家的区间Pythagorean模糊决策矩阵,利用相对贴近系数法、熵值法以及Pythagorean模糊数的距离确定决策专家与属性的权重;其次,利用综合权重与IVPFWA算子将各决策矩阵聚合为综合决策矩阵,接着通过PROMETHEE方法得到最终水资源配置方案的排序结果;最后将该方法运用于优选S市水资源配置方案的案例中,并通过与TOPSIS、VIKOR方法的计算结果对比,最终验证了区间Pythagorean-PROMETHEE算法能够准确地决策出合理的水资源配置方案,且计算结果具有可靠性与有效性。

基于区间毕达哥拉斯犹豫模糊熵和交叉熵的ELECTRE II决策方法

针对属性权重完全未知或部分已知,属性值为区间毕达哥拉斯犹豫模糊数的多属性决策问题,提出了基于区间毕达哥拉斯犹豫模糊熵和交叉熵的ELECTRE II法。首先给出区间毕达哥拉斯犹豫模糊数的区间形式的得分函数和精度函数,定义新的距离测度。然后基于区间毕达哥拉斯犹豫模糊数的模糊因子、直觉因子和幅度因子,给出熵和交叉熵公式,并证明其性质,提出了基于熵和交叉熵确定属性权重的方法。最后提出了区间毕达哥拉斯犹豫模糊环境下的改进的ELECTRE II法,利用综合优势值对方案进行排序,并通过算例和比较分析验证了该方法的可行性和有效性。

概率区间值犹豫模糊集多属性群决策模型及其应用

目的:研究概率区间值犹豫模糊集及应用。方法:将概率区间值犹豫模糊数,用区间值隶属度的中位数、区间值隶属度的清晰度以及概率构成的三维点坐标进行刻画,在此基础上提出了概率区间值犹豫模糊元的相关运算。根据概率区间值犹豫模糊元的相关运算采用熵值法计算属性权重。最后基于TOPSIS思想给出了一个新的贴近度公式,并利用新的贴近度公式对方案排序。结果:建立的概率区间值犹豫模糊集多属性群决策模型可以有效排序方案。结论:将概率区间值犹豫模糊集采用区间值隶属度的中位数、区间值隶属度的清晰度以及概率来表示不仅可行,而且可以用来解决多属性群决策问题。

加权区间值犹豫模糊集的群决策方法

为了在区间值犹豫模糊集(IVHFS)中体现出决策专家的重要性,把所有评审专家的综合权重注入IVHFS中,进而定义了加权区间值犹豫模糊集(WIVHFS).将WIVHFS用三维点坐标(由区间值隶属度的中位数、区间值隶属度的清晰度以及评审专家综合权重构成)进行刻画,在此基础上给出了加权区间值犹豫模糊元(WIVHFE)的相关运算;基于WIVHFE的相关运算采用熵值法计算测评准则客观权重,利用0-1优先关系矩阵来获取任意2个备选方案的总测评准则权重优势值与总测评准则权重劣势值,并依据二者之间的大小排序方案.最后,通过一个具体案例说明了文中理论与方法的可行性.

基于改进区间直觉模糊多属性群决策的在线知识付费产品评价方法研究

针对在线知识付费产品评价与优选问题,从知识付费产品和知识生产者两个维度设计评价属性,提出一种改进的区间直觉模糊多属性群决策方法。首先,考虑决策者的专业性,确定每一属性的决策者权重;其次,构建一种基于信息和知识交流的共识达成模型,使关键性决策信息和知识不会被修改;然后,为了更准确地刻画决策者的心理偏好,提出一种改进前景理论的价值函数;最后,利用一个案例研究,验证了所提方法的有效性,并通过与现有决策方法的对比分析,证实了所提方法的创新性。本研究不仅能从产品质量评价视角为研究在线知识付费产品提供新的研究思路,还能帮助在线知识付费平台评价在线知识付费产品,进而督促知识生产者提高产品质量。

Fuzzy蕴涵代数的区间值fuzzy滤子

将Zadeh提出的区间值fuzzy集的概念应用于Fuzzy蕴涵代数(简称FI代数),提出了FI代数的区间值fuzzy滤子概念并研究其性质。给出了区间值fuzzy集成为区间值fuzzy滤子的两个充要条件;讨论了区间值fuzzy滤子与MP滤子以及fuzzy滤子间的关系;定义了区间值fuzzy滤子的象与原象,获得了它们成为区间值fuzzy滤子的条件。

双论域区间值直觉模糊vague粗糙集及其应用

区间值直觉模糊集可诱导出vague集和粗糙集,而后两者的结合具有不确定性深入分析的优势.立足双论域区间值直觉模糊粗糙集,引入vague集进行融合扩张,研究双论域区间值直觉模糊vague粗糙集.首先,定义区间值直觉模糊vague相容类,构建双论域区间值直觉模糊vague粗糙集模型,提出关于双逼近近似和三支决策区域的计算算法,并确立该模型的精确度、粗糙度、依赖度.然后,研究该模型的近似算子与不确定性度量的性质.最后,采用医疗例子进行模型计算、度量测量、性质验证,并得到关于患者临床诊断的患病分析与治疗决策.

区间值Fuzzy域上的Fuzzy代数

提出了区间值Ｆｕｚｚｙ域及区间值Ｆｕｚｙ代数的概念，给出了一个区间值Ｆｕｚｙ集为区间值Ｆｕｚｙ代数的充分必要条件，并应用区间值Ｆｕｚｚｙ集的扩张原理，讨论了区间值Ｆｕｚｚｙ代数在代数同态下的象和逆象问题．

区间值Fuzzy集的基本理论

本文提出了区间值fuzzy集的上(下)-fuzzy集及[λ_1,λ_2]-截集,并讨论了它们的基本性质.

基于IPFS-DEMATEL-ISM的容器安全威胁关键战术要素研究

为解决电力能源企业“上云”引发的云原生容器安全威胁问题,提出融合区间毕达哥拉斯模糊集(IPFS)、决策试验与评价实验室(DEMATEL)和解释结构模型法(ISM)识别容器安全关键战术要素。首先,基于IPFS提取安全专家对容器入侵威胁战术要素的经验判断,其次,应用DEMATEL和ISM识别容器安全威胁的关键战术要素及要素间的层级拓扑关系。结果表明:持久化和权限提升2个战术阶段的中心度和原因度较高,在整个云原生安全威胁体系中居于核心地位,这2个阶段的安全攻击行为需持高优先级关注;执行和持久化战术阶段的威胁攻击是云原生容器安全的本质要素,初始访问、窃取凭证以及横向移动战术阶段的威胁最直接影响云原生容器安全。研究提出的IPFS-DEMATEL-ISM法相较DEMATEL-ISM和集成三角模糊数的DEMATEL-ISM法在识别容器安全威胁关键战术要素时具有更好区分度和简约解释性。

基于前景理论和混合加权距离的区间值毕达哥拉斯模糊多属性决策

针对现有的毕达哥拉斯模糊评价通常会忽视决策者的主观偏好和风险规避的问题,引入前景理论来反映决策者的主观感受,同时将毕达哥拉斯模糊数改进为区间值毕达哥拉斯模糊数,以避免决策者无法使用准确数值进行评价的情况,并引用基于均衡视角的权重修正系数,防止仅考虑决策者的主观偏好而造成的权重确定的偏差。在此基础上,将区间值毕达哥拉斯混合加权距离引入TOPSIS,以实现对多样性信息的有序集结。最后,通过实例分析和比较分析,对方法的有效性进行验证。

基于区间值犹豫模糊多粒度粗糙集的三支决策模型

针对区间值犹豫模糊信息系统,提出了两种基于区间犹豫模糊多粒度粗糙集的三支决策模型。首先,借助多粒度粗糙集理论,提出乐观和悲观区间犹豫模糊多粒度粗糙集模型。其次,引入区间犹豫模糊连续交叉熵的概念,用TOPSIS方法来计算对象在不同情况下的条件概率。基于此,定义区间犹豫模糊决策理论粗糙集并给出相应的三支决策规则。最后,通过实例验证了这两种模型对目标评估采取不同的态度和决策方案,并且证明了所提算法的有效性。