基于模糊数学和灰色理论的多层次综合评价方法及其应用

针对多层次指标体系的综合评价问题,在模糊综合评判方法的基础上,结合灰色理论,提出了一种新的定量综合评价方法—多层次模糊灰关联聚类分析综合评价方法.应用该方法对油气钻井技术进行综合评价,取得了满意的结果.     

多层次指标投影与模糊综合评判结论的因果分析

数据包络分析方法与模糊综合评判方法是两个十分重要但又相互独立的评价方法，如果能够找到两种方法的关联关系，进而实现两种方法的优势互补将是一项值得探讨的工作。另外，模糊指标合成后，要想应用数据包络分析方法找到更微观指标的改进信息也非常困难。为解决这些问题，本文首先基于模糊综合评判的已有信息，构建多层次模糊评价结果的可能集，并提出多层次模糊投影的定义及相应的计算公式。在此基础上，给出了测度模糊事件存在不足的定量方法。最后，以中国14个旅游省区的游客满意度为例进行了实证分析。     

层次分析、定性数据定量化在煤与瓦斯突出预测中的应用

以统计数据为依据,应用7±2心理极限概念和层次分析法确定各因素权重,采用定性数据定量化方法建立隶属度,采用二级模糊综合评判方法和“加权平均型”评判数学模型,建立了煤与瓦斯突出强度预测模糊综合评判方法,实现了定性问题的定量化分析.     

基于GFScom的多层次模糊综合评判与推理及其应用

根据GFScom的数学思想,提出了多层次的模糊综合评判与模糊推理方法,并将其应用在学生素质模糊评价系统的设计上。在阐述了具体设计思想后,与以往结果作了比较、分析。通过设计过程可以看出,所提出的设计方法不仅有效地模拟了领域专家根据人的感官获得不确定信息而进行推理综合评判过程,而且解决了以往设计方法在建立模糊关系矩阵时由人主观给出所带来的缺陷。     

模糊数限定运算、广义限定运算与广义运算

在综合分析模糊数的限定运算和广义限定运算的基础上,通过扩展模糊数结构元的表示方法,将模糊数结构元理论中的变换函数的单调性推广到连续性(至多在x=0处有一个间断点),提出了模糊数的广义运算,试图解决模糊数运算出现的多种问题。     

公路工程评标中的模糊一致矩阵方法

公路工程评标是一项多目标的复杂决策过程,在公路工程多方案分析评价的层次分析决策中应用模糊一致矩阵方法,有效的避开了模糊综合评判中隶属度确定问题.为公路工程评价方案决策这类定性与定量因素并存、正相关与负相关混杂的多因素、多层次评价提供了另一类有效的评判方法,通过公路工程评标方案的分析得到公路工程方案的排序结果,实例分析证明模糊一致矩阵方法是可行的.     

广义多值直觉模糊软集及其在多属性决策中的应用

软集理论作为一种处理不确定问题的数学新工具弥补了传统模糊理论在参数工具上的不足。本文将广义模糊软集与多值直觉模糊集相结合,提出了广义多值直觉模糊软集的概念,给出了广义多值直觉模糊软集的交、并、补、“且”、“或”运算的概念,并基于这些概念研究其若干相关性质。此外,还将广义多值直觉模糊软集应用到多属性决策问题中去,给出相应的算法。并进行实例分析说明该决策方法的可行性和有效性。     

清晰集构造模糊集的简易方法及其在模糊评判中的应用

运用清晰集合的交、并运算、模糊集的分解定理,本文提出了一个用多个清晰集合构造一个模糊集合的简易方法,并将这个方法应用于模糊综合评判.本方法能将模糊综合评判中取值范围不同的指标的取值范围归一化为区间(0,1).实例表明,本方法在模糊综合评判领域是有效的、且易于操作,可以广泛应用于工程、社科等领域.     

广义模糊DEA模型及其有效性研究

考虑到样本单元和待评价决策单元输入输出数据的模糊性,提出了广义模糊DEA模型,利用α-截集,将广义模糊DEA变换成以置信水平α为参数的参数规划,给出了待评价决策单元效率值θ~*的效率区间的计算方法,并在此基础上讨论了θ~*的隶属函数μ_(θ*).     

多层次模糊综合评判法在宗地估价中的应用

宗地估价中存在着大量的不确定性和模糊性 ,本文以九江市为例应用多层次模糊综合评判法对宗地价格进行评估 ,着重探讨了应用的步骤和数学模型 ,提出它是一种新的土地估价应用方法。     

ON A THEOREM OF A.A. LYAPUNOV

Abstract

In this note we obtain some extensions and an approximation of the Lyapunov convexity theorem by means of the bilinear integration of a set-valued function. The integration is performed successively with respect to a non-atomic, a direct sum and a Darboux vector measure. The necessary counterexamples are provided.     

A Priori and A Posteriori: A Bootstrapping Relationship

The distinction between a priori and a posteriori knowledge has been the subject of an enormous amount of discussion, but the literature is biased against recognizing the intimate relationship between these forms of knowledge. For instance, it seems to be almost impossible to find a sample of pure a priori or a posteriori knowledge. In this paper, it will be suggested that distinguishing between a priori and a posteriori is more problematic than is often suggested, and that a priori and a posteriori resources are in fact used in parallel. We will define this relationship between a priori and a posteriori knowledge as the bootstrapping relationship. As we will see, this relationship gives us reasons to seek for an altogether novel definition of a priori and a posteriori knowledge. Specifically, we will have to analyse the relationship between a priori knowledge and a priori reasoning, and it will be suggested that the latter serves as a more promising starting point for the analysis of aprioricity. We will also analyse a number of examples from the natural sciences and consider the role of a priori reasoning in these examples. The focus of this paper is the analysis of the concepts of a priori and a posteriori knowledge rather than the epistemic domain of a posteriori and a priori justification.     

NAMING A COLUMN ON A SPREADSHEET

Spreadsheets use a meaningful algebra-like notation which, research suggests, can support pupils in developing an understanding of variables. This paper discusses the activity of Year 8 pupils who were taught to name a column on a spreadsheet, and who were asked to reflect upon their activity in a stimulated recall interview. More specifically, it considers the pupils' understanding of notation, such as 'A2' and 'm', which they used when constructing spreadsheet formulae. It is suggested that experience of naming columns may help pupils to develop a clearer sense of the notation as a variable, and to make links between their spreadsheet activity and use of standard algebraic notation [1].     

A REMARK ON A BMO MARTINGALE

Let M = (Mt,Ft) be a uniformly integrable continuous martingale with MO = 0. For1 5 p < cot we setIIMllBMO. = '3p II[E[IMoo ~ MTIplFT]]'/Pll.,where the supremum is taken over all stopping times T.Set BMO. = {M: IIMllBMO. < co}. It is well known that BMO. = BMO, (VI S p 5 q).F'urthermore, all 11.llBMO. norms are equivalent andIIi ~~if;llMllBMO. = SUP T P(T < co)i'where the supremum is taken over all stopping times T satisfying P(T < co) > 0. In the laterwe shall simply …     

有限群的一个类函数的模构造

本文研究了有限群上的一个类函数.通过计算它和不可约特征标的内积,证明了它是特征标并且通过复群代数的中心的正则表示给出了它的一个模构造.     

A new characterization of A 5

Let G be a group and τ _e (G) the set of numbers of elements of G of the same order. In this paper, by τ _e (G), we give a new characterization of A ₅, where A ₅ is the alternating group of degree 5. We get the theorem following: Theorem. Let G be a group, ${G\cong A_5}$ if and only if τ _e (G) = τ _e (A ₅) = {1, 15, 20, 24}.