An extension of fuzzy TOPSIS for a group decision making with an application to tehran stock exchange

In financial markets, investors attempt to maximize their profits within a constructed portfolio with the aim of optimizing the tradeoffs between risk and return across the many stocks. This requires proper handling of conflicting factors, which can benefit from the domain of multiple criteria decision making (MCDM). However, the indexes and factors representing the stock performance are often imprecise or vague and this should be represented by linguistic terms characterized by fuzzy numbers. The aim of this research is to first develop three group MCDM methods, then use them for selecting undervalued stocks by dint of financial ratios and subjective judgments of experts. This study proposes three versions of fuzzy TOPSIS (Technique for Order Preference by Similarity to Ideal Solution): conventional TOPSIS (C-TOPSIS), adjusted TOPSIS (A-TOPSIS) and modified TOPSIS (M-TOPSIS) where a new fuzzy distance measure, derived from the confidence level of the experts and fuzzy performance ratings have been included in the proposed methods. The practical aspects of the proposed methods are demonstrated through a case study in the Tehran stock exchange (TSE), which is timely given the need for investors to select undervalued stocks in untapped markets in the anticipation of easing economic sanctions from a change in recent government leadership.     

基于粗糙集的直觉模糊TOPSIS多属性决策方法

针对属性值为直觉模糊信息且属性权重完全未知的多属性决策问题,提出了一种基于粗糙集的直觉模糊TOPSIS多属性决策方法.首先给出了直觉模糊信息的正、负理想点的求法,根据属性值与理想点的贴近度和给定的阈值求得判断矩阵,再根据判断矩阵对属性约简,确定各属性的权重,最后依据TOPSIS思想计算各方案与理想点的加权贴近度,得到方案的排序,并通过算例的分析比较验证了此方法的有效性.     

山区河流可持续发展能力评价研究

结合山区河流基本特征,从生态功能和人类服务功能两方面建立了山区河流可持续发展能力评价指标体系。基于信息熵和逼近于理想解的排序方法,提出了山区河流可持续发展能力的评价模型。以怒江中游为例,通过比较分析水电开发和旅游开发两种开发方式的可持续发展能力,验证了本文模型的科学性和可行性。分析结果表明:水电开发对怒江中游可持续发展的影响要大于旅游开发,主要体现在水电开发对当地社会经济的发展贡献较大,对生态环境的保护力度较大,但对自然的改变也较大。最后提出了多目标协同开发的山区河流可持续发展的对策。     

A novel hybrid MCDM approach based on fuzzy DEMATEL, fuzzy ANP and fuzzy TOPSIS to evaluate green suppliers

It is well known that “green” principles and strategies have become vital for companies as the public awareness increased against their environmental impacts. A company’s environmental performance is not only related to the company’s inner environmental efforts, but also it is affected by the suppliers’ environmental performance and image. For industries, environmentally responsible manufacturing, return flows, and related processes require green supply chain (GSC) and accompanying suppliers with environmental/green competencies. During recent years, how to determine suitable and green suppliers in the supply chain has become a key strategic consideration. Therefore this paper examines GSC management (GSCM) and GSCM capability dimensions to propose an evaluation framework for green suppliers. However, the nature of supplier selection is a complex multi-criteria problem including both quantitative and qualitative factors which may be in conflict and may also be uncertain. The identified components are integrated into a novel hybrid fuzzy multiple criteria decision making (MCDM) model combines the fuzzy Decision Making Trial and Evaluation Laboratory Model (DEMATEL), the Analytical Network Process (ANP), and Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) in a fuzzy context. A case study is proposed for green supplier evaluation in a specific company, namely Ford Otosan.     

高校创新性人才评价决策系统的分析与设计

分析了高校创新性人才评价决策系统并介绍了方案的初步设计。在系统中,采取C/S模式构架,并采用功能强大、简单易学的Delphi6进行开发,数据库采用SQLServer2000,建立了不同于传统高校人才综合测评的新的侧重于创新性素质的评价指标体系。评价方法主要采用加权和法和TOPSIS法,并且使两者很好地结合起来,较好地实现对高校创新性人才的综合评价。     

产品技术经济综合评价原型系统

在层次分析法的基础上，提出了一种将TOPSIS法和AHP法进行融合的综合评价方法．此方法可对产品进行全面的技术经济综合评价，为企业进行决策提供依据，使产品研制建立在一个更加客观的量化分析基础之上．结果表明，这种方法科学合理、简明方便，能够处理多层复杂问题，为产品技术经济综合评价提供了思路，具有普遍意义，能推广应用于其他领域的评估．     

An objective approach to MADM with interval numbers

In ambiguous decision domain, interval numbers are always employed to model multiple attribute decision making （MADM） problems, in which attribute values of alternatives are expressed in the form of intervals. In this study, a new approach is proposed for the interval MADM problems： The interval decision matrix is transformed into definite one by comparing the interval attribute values with the base intervals of attributes; The attribute weights are determined based on the definite decision matrix; the alternatives are assessed based on TOPSIS. An example of assessing the faculty candidates （alternatives） is used to illustrate the proposed approach.     

火电厂建设项目影响评价及其环境因素分析

火电厂建设项目影响评价有利于控制项目风险.对火电厂建设项目影响评价中环境影响要素及指标进行了细致的分析,并对影响状况、相应处理措施及管理水平进行审查评估.利用TOPSIS法对火电机组环境影响状况进行实例评价,提出改进建议.     

基于AHP—TOPSIS的渗透测试工具的综合评价模型

综合TOPSIS和AHP方法,针对网络安全工具难以精确抉择的问题,提出一种简单、易实现且灵活性较强的综合评价模型.首先是从各个工具的功能、使用平台、使用人员期望以及用户评分等4个评判指标进行展开分析,建立出综合评价模型的指标体系;其次,利用AHP法和Matlab软件确定各指标相应的客观权重并进行综合分析并建立判断矩阵;...     

异构无线网络中基于信任度的接入选择算法

针对异构无线网络不确定性的特点,提出一种基于信任度的接入选择算法。引入直接信任度、推荐信任度、推荐主体可信度和信任时间戳4个参量计算网络的信任度,利用信任度对网络性能指标进行信任加权。同时,综合考虑用户个人偏好,对网络进行逼近理想解排序,得到最佳接入网络。仿真实验结果表明,该方法综合考虑了网络多种性能指标及其信任度,能提高异构无线网络中用户选择网络的安全性。