共查询到18条相似文献,搜索用时 62 毫秒
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基于包含度的Vague集相似度量 总被引:9,自引:0,他引:9
在模糊模式识别中经常要根据最大相似度原理来分辨待测样品属于哪种模式.由于现有的vague集相似度量公式都是基于距离测度的,因此只要vague集间距离测度一样,它们就无法分辨,因此非常有必要寻找其它的相似度量计算方法.首先将模糊集上的包含度概念扩展到Vague集上,指出Vague集相似度量可以由包含度诱导出,然后给出一组新的Vague集相似度量计算公式.数值算例证明它们是有效的,最后将它们与现有方法进行比较,发现它们各有所长. 相似文献
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包含度是不确定推理理论中度量两集合间的包含程度的一种有力工具。提出了直觉模糊集上的混合单调包含度(简称IFH包含度)的定义。构造了一些具体的IFH包含度,证明了这些构造方法的合理性。讨论了一些特殊的IFH包含度所满足的分配性质和传递性质。给出了IFH包含度在知识模式匹配中的应用。丰富了包含度理论,同时为研究直觉模糊集之间的包含程度提供了具体方法。 相似文献
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基于海明距离的直觉模糊粗糙集相似度量方法 总被引:1,自引:0,他引:1
针对直觉模糊粗糙集的相似度量问题,提出了一种基于海明距离的直觉模糊粗糙集相似度量方法。首先给出了两个直觉模糊粗糙值问的相似度量方法,并揭示了它的若干重要性质。然后,在此基础上,又提出了一种基于海明距离的直觉模糊粗糙集相似度量方法,并证明它也具有同样的性质。最后用数值算例验证了这种方法的有效性。 相似文献
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直觉模糊集合(intuitionistic fuzzy sets,简称IFSs)是模糊集(fuzzy sets,简称FSs)的拓展,IFSs间的相似度量是IFSs理论中的一个重要研究问题.在对现存的IFSs的相似度量方法进行研究的基础上,基于投票模型,提出了一种新的基于正态分布函数的相似度量方法,实例证明该方法既可以解决几种特殊的直觉模糊集合之间的相似度量问题,也可以克服现存的几种相似度量方法中所存在的缺陷,而且还非常适合于语言变量之间的相似度量,为IFSs在数据库的模糊查询的应用提供了一种新的方法. 相似文献
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构造并系统研究了直觉模糊T模的剩余蕴涵。在此基础上,推导出了直觉模糊粗糙集的一种构造模型,证明了Pawlak粗糙集、直觉模糊集、模糊粗糙集、粗糙模糊集及模糊T粗糙集都是直觉模糊粗糙集的特殊情形。最后给出并证明了直觉模糊粗糙集的一些性质。 相似文献
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In this paper a fuzzy distance measure between two generalized fuzzy numbers is developed. The metric properties of this distance measure are also studied. The new distance measure is compared with the other fuzzy distance measures proposed by Voxman [W. Voxman, Some remarks on distances between fuzzy numbers, Fuzzy Sets and Systems 100 (1998) 353–365] and Chakraborty and Chakraborty [C. Chakraborty, D. Chakraborty, A theoretical development on fuzzy distance measure for fuzzy numbers, Mathematical and Computer Modelling 43 (2006) 254–261] and turned out to be more reasonable. A new similarity measure is also developed with the help of the fuzzy distance measure. Examples are given to compare this similarity measure with the other similarity measure previously proposed. A decision making scheme is proposed using this similarity measure and this scheme is found to be more acceptable than the existing methods due to the fact that it considers the degrees of confidence of the experts’ opinion. 相似文献
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Molodtsov (1999) initiated the concept of soft sets in [1]. Maji et al. (2003) defined some operations on soft sets in [22]. Akta? and Ça?man (2007) generalized soft sets by defining the concept of soft groups in [16]. After them, Sun et al. (2008) gave soft modules in [21]. In this paper, the concept of an intuitionistic fuzzy soft module is introduced and some operations on intuitionistic fuzzy soft sets are given. Finally, some of its basic properties are studied. 相似文献
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李香英 《计算机工程与应用》2014,50(19):227-231
基于犹豫模糊熵的概念,提出了区间犹豫模糊熵和相似度的概念,同时研究了它们之间的相互关系。给出了区间犹豫模糊熵的公理化定义,在此基础上构造了两种形式的熵测度公式,并且证明了它们满足区间犹豫模糊熵的四条公理化准则;依据区间犹豫模糊熵引入了区间犹豫模糊加权熵的概念;提出了区间犹豫模糊相似度的概念,并且研究了区间犹豫模糊环境下的熵和相似度之间的关系。 相似文献
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Due to the complexity and uncertainty of the objective world, as well as the limitation of human ability to understand, it is difficult for one to employ only a single type of uncertainty method to deal with the real-life problem of decision-making, especially problems involving conflicts. On the other hand, by incorporating the advantages of various theories of uncertainty, one is expected to develop a more powerful hybrid method for soft decision making and to solve such problems more effectively. In view of this, in this paper the thought and method of intuitionistic fuzzy set and rough set are used to construct a novel intuitionistic fuzzy rough set model. Corresponding to the fact that the decision-making information system of rough sets is of intuitionistic fuzzy information system, our method defines the conflict distance by using the idea of measuring intuitionistic fuzzy similarity so that it is introduced into the models of rough sets, leading to the development of our intuitionistic fuzzy rough set model. After that, we investigate the properties of the model, introduce a novel tool for conflict analysis based on our hybrid model, and employ this new tool to describe and resolve a real-life conflict problem. 相似文献