考虑QoS偏好的多属性群决策服务选择策略

面对多个功能相同或相似的服务,服务的Qo S是服务选择中重要的考虑因素.将Qo S属性分为精确数型、区间数型和三角模糊数型.在此基础上,利用TOPSIS（technique for order preference by similarity to an ideal solution）条件下的多属性群决策模型给出了服务选择过程,该过程考虑了多个决策者在决策过程中所占的权重,以及多个决策者不同的Qo S偏好权重.通过一个实例验证了该方法的有效性.     

煤矿运输安全性评价的基于熵权的TOPSIS方法

安全性评价是提高企业安全生产水平的重要措施之一.基于熵权的TOPSIS方法是一种新的安全性评价方法,该方法以熵理论确定了评价指标的权重———熵权,从而避免了低层次多因素权重确定的主观性.以评价对象与理想解和负理想解的距离确定的相对接近度作为评价准则,避免了评价方法的主观性.通过对平顶山煤业(集团)有限责任公司一矿井下运输系统的安全性进行评价,得出了各子系统的安全性排序,指出了各子系统存在的问题并提出了相应的改进措施.结果表明,该方法易于操作,便于推广使用.     

基于熵权的TOPSIS模型在水利工程评标决策中的应用

将TOPSIS模型应用于水利工程项目评标中,并引用信息熵理论来计算各指标的权重,该方法可以避免由专家确定权重的主观性。同时,建立了基于信息熵的TOPSIS水利工程项目评标模型,模拟结果表明其计算简便,思路清晰,结果令人满意,适合于水利工程评标决策。     

A comparison between Fuzzy AHP and Fuzzy TOPSIS methods to supplier selection

Supplier selection has become a very critical activity to the performance of organizations and supply chains. Studies presented in the literature propose the use of the methods Fuzzy TOPSIS (Fuzzy Technique for Order of Preference by Similarity to Ideal Solution) and Fuzzy AHP (Fuzzy Analytic Hierarchy Process) to aid the supplier selection decision process. However, there are no comparative studies of these two methods when applied to the problem of supplier selection. Thus, this paper presents a comparative analysis of these two methods in the context of supplier selection decision making. The comparison was made based on the factors: adequacy to changes of alternatives or criteria; agility in the decision process; computational complexity; adequacy to support group decision making; the number of alternative suppliers and criteria; and modeling of uncertainty. As an illustrative example, both methods were applied to the selection of suppliers of a company in the automotive production chain. In addition, computational tests were performed considering several scenarios of supplier selection. The results have shown that both methods are suitable for the problem of supplier selection, particularly to supporting group decision making and modeling of uncertainty. However, the comparative analysis has shown that the Fuzzy TOPSIS method is better suited to the problem of supplier selection in regard to changes of alternatives and criteria, agility and number of criteria and alternative suppliers. Thus, this comparative study contributes to helping researchers and practitioners to choose more effective approaches for supplier selection. Suggestions of further work are also proposed so as to make these methods more adequate to the problem of supplier selection.     

A model for evaluating computer network security systems with 2-tuple linguistic information

With respect to comprehensive evaluation model for computer network security with linguistic information and incomplete weight information, a new comprehensive evaluation model is proposed. In the method, the 2-tuple linguistic representation developed in recent years is used to aggregate the linguistic assessment information. In order to get the weight vector of the attribute, we establish an optimization model based on the basic ideal of traditional TOPSIS, by which the attribute weights can be determined. Then, the optimal alternative(s) is determined by calculating the shortest distance from the 2-tuple linguistic positive ideal solution (TLPIS) and on the other side the farthest distance of the 2-tuple linguistic negative ideal solution (TLNIS). The method has exact characteristics in linguistic information processing. It avoided information distortion and losing which occurred formerly in linguistic information processing. Finally, a numerical example of the evaluation of network security systems is used to illustrate the use of the proposed method. The result shows the approach is simple, effective and easy to calculate.     

基于马氏距离的改进型TOPSIS在供应商选择中的应用

由于传统逼近理想解排序法(TOPSIS)的应用中各属性指标之间普遍存在线性相关,导致运用欧氏距离公式计算各评价对象到正负理想解的距离失效.运用马氏距离不受量纲影响以及消除变量间相关性的特性改进传统TOPSIS的距离计算,改进后的TOPSIS具有明显的科学性与合理性.最后,给出了该方法在供应商选择中的应用.     

基于TOPSIS法的大型床身优选设计

以球形蜗杆砂轮磨齿机的床身为研究对象,设计了不同的床身结构作为备选方案,并建立了各方案参数化模型,对其进行了灵敏度分析和多目标优化计算确定其最优尺寸参数,通过对其进行有限元分析获得了优选决策的初步数据。建立了床身优选评价的TOPSIS数学模型,经计算求解优选出最佳方案。对比分析了优选前后床身的静态和动态性能,验证了床身的优选结果的有效性,完成了球形蜗杆砂轮磨齿机床身的优选设计。     

基于熵权改进的TOPSIS法的教师教学质量评价

为了提升高等学校教学质量,针对高校教师结构及教学特点,基于教师综合能力构建了科学、有效、可操作的教师教学质量评价指标,运用熵权法确定客观权重,提出了以TOPSIS法为基础的教学质量评价方法,并建立了高等学校教师教学评价体系.结果表明,熵权改进的TOPSIS法能弥补指标体系受主观偏好影响过大的缺陷,较好地体现了评价的客观性、公正性和时效性,搭建的教师专业评价系统界面友好,易于推广,为实际操作提供了便捷的软件支撑.     

TOPSIS法在地表水体环境质量评价中的实践

文章介绍了目前水环境的状况及水环境质量评价的紧迫性,并且从众多评价方法中选择了TOPSIS水环境评价方法,介绍了它的原理及评价步骤,并且用它对开封市化肥河2001～2005年的水环境质量状况进行了评价,建立了评价模型。最后通过计算比较得出了与实际相符合的结果。这条河流的水为劣V类,富含大量的重金属,但是水质有逐年转好的趋势,这说明近几年开封市政府及环保局在这方面做出了一定的努力。另外分析了TOPSIS这种评价方法的优缺点并提出了改进方法。     

基于TOPSIS法的运动员攻防能力指标评价研究

运用TOPSIS分析法对2016年里约奥运会中国队与对手攻防能力指标进行定量分析,为中国男篮训练提供评价标准。研究认为,在进攻能力方面,美国队、澳大利亚队和法国队的进攻Ci值超过了0.5,属于进攻能力较强的队伍;而委内瑞拉、塞尔维亚和中国队的进攻Ci值则低于0.5,进攻能力相对较为弱一些。在防守能力方面,美国队、澳大利亚队、法国队、委内瑞拉、塞尔维亚和中国队的防守Ci值均超过了0.5,属于防守能力较强的队伍。美国队、澳大利亚队和法国队的攻防Ci值均超过了0.5,属于综合实力较强的队伍;而委内瑞拉、塞尔维亚和中国队的攻防Ci值均在0.5以下,攻防能力相对较弱。