Power Aggregation Operators and Similarity Measures Based on Improved Intuitionistic Hesitant Fuzzy Sets and their Applications to Multiple Attribute Decision Making

Intuitionistic hesitant fuzzy set(IHFS)is amixture of two separated notions called intuitionistic fuzzy set(IFS)and hesitant fuzzy set(HFS),as an important technique to cope with uncertain and awkward information in realistic decision issues.IHFS contains the grades of truth and falsity in the formof the subset of the unit interval.The notion of IHFS was defined by many scholars with different conditions,which contain several weaknesses.Here,keeping in view the problems of already defined IHFSs,we will define IHFS in another way so that it becomes compatible with other existing notions.To examine the interrelationship between any numbers of IHFSs,we combined the notions of power averaging(PA)operators and power geometric(PG)operators with IHFSs to present the idea of intuitionistic hesitant fuzzy PA(IHFPA)operators,intuitionistic hesitant fuzzy PG(IHFPG)operators,intuitionistic hesitant fuzzy power weighted average(IHFPWA)operators,intuitionistic hesitant fuzzy power ordered weighted average(IHFPOWA)operators,intuitionistic hesitant fuzzy power ordered weighted geometric(IHFPOWG)operators,intuitionistic hesitant fuzzy power hybrid average(IHFPHA)operators,intuitionistic hesitant fuzzy power hybrid geometric(IHFPHG)operators and examined as well their fundamental properties.Some special cases of the explored work are also discovered.Additionally,the similarity measures based on IHFSs are presented and their advantages are discussed along examples.Furthermore,we initiated a new approach to multiple attribute decision making(MADM)problem applying suggested operators and a mathematical model is solved to develop an approach and to establish its common sense and adequacy.Advantages,comparative analysis,and graphical representation of the presented work are elaborated to show the reliability and effectiveness of the presented works.

A Synergistic Multi-Attribute Decision-Making Method for Educational Institutions Evaluation Using Similarity Measures of Possibility Pythagorean Fuzzy Hypersoft Sets

Due to the numerous variables to take into account as well as the inherent ambiguity and uncertainty,evaluating educational institutions can be difficult.The concept of a possibility Pythagorean fuzzy hypersoft set(pPyFHSS)is more flexible in this regard than other theoretical fuzzy set-like models,even though some attempts have been made in the literature to address such uncertainties.This study investigates the elementary notions of pPyFHSS including its set-theoretic operations union,intersection,complement,OR-and AND-operations.Some results related to these operations are also modified for pPyFHSS.Additionally,the similarity measures between pPyFHSSs are formulated with the assistance of numerical examples and results.Lastly,an intelligent decision-assisted mechanism is developed with the proposal of a robust algorithm based on similarity measures for solving multi-attribute decision-making(MADM)problems.A case study that helps the decision-makers assess the best educational institution is discussed to validate the suggested system.The algorithmic results are compared with the most pertinent model to evaluate the adaptability of pPyFHSS,as it generalizes the classical possibility fuzzy set-like theoretical models.Similarly,while considering significant evaluating factors,the flexibility of pPyFHSS is observed through structural comparison.

On Similarity Measures and Distance Measures of Fuzzy Soft Sets

In this paper we introduce several new similarity measures and distance measures between fuzzy soft sets, these measures are examined based on the set-theoretic approach and the matching function. Comparative studies of these measures are derived. By introducing two general formulas, we propose a new method to define the similarity measures and the distance measures between two fuzzy soft sets with different parameter sets.

A novel similarity measure between intuitionistic fuzzy sets based on the mid points of transformed triangular fuzzy numbers with applications to pattern recognition and medical diagnosis

Similarity measure is an essential tool to compare and determine the degree of similarity between intuitionistic fuzzy sets (IFSs). In this paper, a new similarity measure between intuitionistic fuzzy sets based on the mid points of transformed triangular fuzzy numbers is proposed. The proposed similarity measure provides reasonable results not only for the sets available in the literature but also gives very reasonable results, especially for fuzzy sets as well as for most intuitionistic fuzzy sets. To provide supportive evidence, the proposed similarity measure is tested on certain sets available in literature and is also applied to pattern recognition and medical diagnosis problems. It is observed that the proposed similarity measure provides a very intuitive quantification.

Study of Similarity Measures with Linear Discriminant Analysis for Face Recognition

Face recognition systems have been in the active research in the area of image processing for quite a long time. Evaluating the face recognition system was carried out with various types of algorithms used for extracting the features, their classification and matching. Similarity measure or distance measure is also an important factor in assessing the quality of a face recognition system. There are various distance measures in literature which are widely used in this area. In this work, a new class of similarity measure based on the Lp metric between fuzzy sets is proposed which gives better results when compared to the existing distance measures in the area with Linear Discriminant Analysis (LDA). The result points to a positive direction that with the existing feature extraction methods itself the results can be improved if the similarity measure in the matching part is efficient.

Approximation operators based on vague relations and roughness measures of vague sets

Rough set theory and vague set theory are powerful tools for managing uncertain, incomplete and imprecise information. This paper extends the rough vague set model based on equivalence relations and the rough fuzzy set model based on fuzzy relations to vague sets. We mainly focus on the lower and upper approxima- tion operators of vague sets based on vague relations, and investigate the basic properties of approximation opera- tors on vague sets. Specially, we give some essential characterizations of the lower and upper approximation operators generated by reflexive, symmetric, and transi- tive vague relations. Finally, we structure a parameterized roughness measure of vague sets and similarity measure methods between two rough vague sets, and obtain some properties of the roughness measure and similarity measures. We also give some valuable counterexamples and point out some false properties of the roughness measure in the paper of Wang et al.

一种Vague值转化Fuzzy值的偏联系数方法

针对Vague集与Fuzzy集,结合联系数理论,提出了一种基于Vague值转化为Fuzzy值的偏联系数方法。通过实例验证了该方法是合理可行且有效的。

Vague集向Fuzzy集转化的方法分析

介绍了Vague集与Fuzzy集的特点,结合Vague集理论及投票模型下的解释,对Vague集向Fuzzy集转化的多种方法进行了分析,指出已有方法的不足,根据Vague集的三维特性并结合人的心理变化情况首次直观地提出一种新的有效非线性方法,并通过实例说明该方法的正确性和直观性。

基于等量效果的Vague集转化为Fuzzy集的方法

当前Vague集转化为Fuzzy集的方法更多是根据直观,而没能详细阐述所基于的原理。为能更好理解Vague集转化为Fuzzy集的过程,考虑将Vague集转化为Fuzzy集模拟为一个最终无弃权票的多轮投票过程,从而构造了一种效果函数的定义,用以表示支持力度。并结合积分第一中值定理的意义提出了一种新的基于等量效果的转化方法,以保证在转化过程中,所关心的总效果没有发生变化。最后结合实例,严格分析了该方法的良好性质以及合理性。

Vague集向Fuzzy集转化的方法模型

结合Vague集理论及投票模型下的解释,对Vague集向Fuzzy集转化的方法进行了分析,提出了一种新的转化方法模型,并从理论上解释了已有方法的合理性与不足。

Vague集转化为Fuzzy集的新方法

结合Vague集理论及投票模型下的解释,对Vague集向Fuzzy集转化的方法进行了分析,指出已有方法存在的不足之处,提出了一种Vague集转化为Fuzzy集的新方法,并证明了该方法的有效性。

Vague集向Fuzzy集转化的新方法

指出了Vague集向Fuzzy集转化已有方法存在的不足,给出了Vague集转化为Fuzzy集应满足的约束准则,提出了一种Vague集向Fuzzy集转化的新方法,并证明了该方法的有效性,通过实例说明该方法比已有方法更合理。

Vague集向Fuzzy集转化的一种新方法

结合Vague集理论及投票模型下的解释,对Vague集向Fuzzy集转化的方法进行了分析,指出已有方法存在的不足之处,提出了一种新的有效转化方法,并通过实例说明其有效性。

Vague集向Fuzzy集转化的两种新方法

指出了陈玉明等提出方法存在的不足之处,结合Vague集理论及投票模型下的解释,给出了Vague集向Fuzzy集转化时应满足的约束条件,提出了Vague集向Fuzzy集转化的两种新方法,并说明了其有效性。

Vague集向Fuzzy集的转化方法的比较

证明了vague集转化为fuzzy集的三角形法和不确定度加权法都是实用方法,证明了这两种方法是相同的方法,且证明了这两种方法都是加权均值修正法的特殊情况。

关于“Vague集向Fuzzy集的转换函数”的注记

结合Vague集理论及投票模型下的解释,对"Vague集向Fuzzy集的转化函数"进行了分析,指出了其存在的不足之处,提出了两种Vague集转化为Fuzzy集的新方法,并证明了其有效性。

区间Vague集向Fuzzy集转化的一种新方法及实证分析

结合Vague集理论及一些Vague集向Fuzzy集转化的方法解释,对区间Vague集向Fuzzy集转化的方法进行了研究.结合区间Vague值的加权算术和加权几何集成算子,给出了区间Vague集的隶属度,进而给出了区间Vague值的一种有效的排序方法,并通过实例说明其有效性.

边界不确定信息的处理—Fuzzy集和Vague集

Fuzzy集和Vague集都可用于边界不确定信息的处理。文章首先研究了这两种集合间的关系、性质,提出了Fuzzy集和Vague集的边界不确定性都可用犤0,1犦上的一个子区间来进行描述的思想。然后基于一些Vague集相似度量的思想,提出了一种求Fuzzy集和Vague集的相似性度量方法,并建立了基于Fuzzy集和Vague集度量方法的统一模型,该模型在这两种集合相似性度量上是等价的,并给出了该模型满足的性质。

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.