Eco-material selection using fuzzy TOPSIS method

In the classical multiple attribute decision-making or MADM methods, the ratings and the weights of the criteria are known precisely. However, in eco-material selection exercises, the available data are typically inadequate because of the selection dual quantitative and qualitative natures. Some of the qualitative selection criteria can be rated in several classes rather being expressed by exact numerical values; hence the application of fuzzy concepts in decision-making seems attractive to deal with such kind of ratings. Thusly, the presented study attempts to propose an eco-material selection approach specific to the automobile body panels using a fuzzy technique for order preference by similarity to ideal solution (TOPSIS), to incorporate both numerical and rating-based criteria into one holistic sustainability model. TOPSIS and fuzzy logic can aid the material selection process in translating the design goals and parameters into usable numbers that in turn can be used to rank candidate materials in their closeness to the ideal solution. An additional uniqueness of this study stems from using the fuzzy-TOPSIS as a scoring tool without any assigned weights for the different selection attributes, in order to avoid the bias that is typically associated with other classical MADM, such as quality function deployment, analytical hierarchy process and digital logic.     

基于直觉三角模糊TOPSIS的高铁列车调度指挥人因失误风险排序

针对高速铁路调度指挥人因风险排序问题,从人因失误概率、人因失误探测度、人因失误重要度和事故严酷度四个方面构建风险评价指标体系。考虑到人因风险指标的模糊性和不确定性,用直觉三角模糊数描述各指标值,基于直觉模糊熵计算指标客观权重,然后建立基于TOPSIS法的高铁列车调度指挥人因失误风险排序模型。最后,基于实例验证了排序模型的实用性。     

行业视角分要素环境经济综合测度分析研究

工业行业之间的污染负荷和产出效益的差异尚未得到足够关注.本文利用TOPSIS综合评价法,选取工业行业水、大气、产出等环境经济指标,分别测度污染负荷和产出效益的行业排名和变化趋势,并对重污染行业的水、大气污染负荷协调度进行综合评价,以揭示不同行业环境经济协调度变化情况.结果表明：不同要素的行业污染负荷差异显著,行业内的水、大气污染负荷呈现分化,行业环境经济协调度的结构和趋势变化明显,需区别对待不同行业不同要素的治污减排措施.     

三峡库区长江干流入出库水质评价及其变化趋势

水质问题关系着三峡工程的安全运行与库区社会经济的可持续发展.选取重庆朱沱断面和湖北南津关断面分别代表三峡库区长江干流的入出库断面,在对DO、COD_(Mn)和NH_3-N的年均、季均值统计基础上,运用基于灰色关联系数矩阵的TOPSIS法评价入出库水质,运用R/S法查明入出库水质的未来变化趋势.结果表明:入出库水质在2004—2014年间均介于Ⅰ、Ⅱ类间(《地表水环境质量标准》(GB 3838—2002)),其中,2004—2007年、2012—2014年均为Ⅰ类,2008年均为Ⅱ类,2009—2010年均在Ⅰ、Ⅱ类间变动,且均距Ⅰ类较近;入出库断面每年4个季度水质的相对贴近度均在Ⅰ、Ⅱ类间波动,但更偏近于Ⅰ类,这一趋势在多年平均情况下最为显著,2005—2007、2009、2010和2013年整体上两断面水质在4个季度中存在着相反的变化趋势;年均入库水质变化明显呈现良好趋势,而出库水质变化趋势基本不变.入出库季均水质变化呈现明显的阶段性差异,入出库过去的水质变好趋势会延续到未来相同的时间序列里,但这种水质变好趋势在将来的变化中并不稳定,具有一定的随机性.本研究结果有助于提高人们对三峡工程阶段性的蓄水对长江干流水质产生明显影响的认识,丰富人们对近年实施的环库生态治理工程成效的理解.     

综采工作面安全性评价的逼近理想解(TOPSIS)方法

基于熵权的TOPSIS(逼近理想解的排序方法)方法是一种新的安全性评价方法,该方法以灰熵理论确定评价指标的权重———熵权,从而避免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六矿综采工作面安全性进行的评价,指出综采工作面安全管理中存在的问题,并提出相应的改进措施。理论与实例表明,该方法较其他方法更加客观,更易于操作,结果也更符合生产实际。     

基于DEA-TOPSIS时间序列的建筑业政府安全监管效率分析

为对建筑业政府安全监管效率进行科学合理的评价,优化资源配置,提高资源利用率,提升监管水平,在建立效率评价指标体系的基础上,将数据包络分析法(DEA)和优劣解距离法(TOPSIS)组合,构建建筑业政府安全监管效率评价模型,对2012—2019年西安市建筑业政府安全监管效率进行实证分析。结果表明：该模型能较好地应用于建筑业政府安全监管效率评价,通过获取政府投入指标的松弛变量值,分析建筑业政府安全监管效率,为政府优化资源配置提供借鉴。     

旅游业发展与城市发展的协调性比较研究——安徽省旅游城市实证分析

旅游业发展是城市经济社会发展的重要组成部分,城市发展和旅游业发展之间存在明显的推动作用,两者协调发展是城市和旅游可持续发展的关键.以安徽省的黄山市、池州市和芜湖市为例,构建相应指标,运用TOPSIS法对2008年、2009年三市旅游和城市发展的协调性进行了对比研究.结果表明,2008年、2009年芜湖市的旅游和城市发展的协调系数为分别0.6287和0.6588,黄山市为0.46450和0.4799,池州市为0.3822和0.4037,说明旅游与城市发展的协调性与城市发展水平存在一定的正向关系.城市发展水平越高,其经济部门相对齐全,旅游更能带动城市各项事业的发展,而城市各项事业的发展反过来又促进旅游的发展,城市和旅游的协调性相对较好.     

A hybrid model for remanufacturing facility location problem in a closed-loop supply chain

Traditional supply chain design is merely based on the open loop or forward flow of materials, neglecting reverse flow for recovery of materials despite the recent concerns of customers and governments about environmental and production cost reductions. New supply chain design should be closed loop which implements traditional supply chain concepts with reverse flow or a material recovery system to reduce production cost and enhance customer satisfaction about environmental consciousness and to meet legal requirements. In our research, we designed a closed-loop supply chain which consists of recovery options such as collection centres and remanufacturing plants (reverse flow) in addition to traditional supply chain tiers (forward flow), and tried to find the best location for these facilities in a discrete space based on decision makers' opinions. Since there are uncertainties about decision parameters in an uncapacitated facility location problem, we implemented the fuzzy TOPSIS method to solve the location decision problem and find the best place to locate a remanufacturing facility.     

Selection of green product design scheme based on multi-attribute decision-making method

The function, cost and environmental performance are the primary decision-making factors for scheme selection in green design. For the comprehensive and accurate decision-making in selecting green product design scheme, a quantitative analysis method of multi-attribute decision-making (MADM) is presented. With analysing the multi-attribute of scheme selection, the MADM model is established, which takes environmental impact of materials, disassembly performance, recycling performance, energy efficiency, noise, pollutants to environmental and functional values. Fuzzy technique for order performance by similarity to ideal solution method is applied to solve this model for the feasible solutions. Finally, a case study is given to validate the application of this methodology as a useful design guideline for scheme selection in green design.     

基于DEA-TOPSIS模型的水上应急资源配置效率评价

合理配置水上应急资源能有效提升水上搜救效率。在建立了3层评价指标体系的基础上,以应急资源加权的投入产出比为目标函数,引入数据包络分析方法构建了水上应急资源配置效率评价模型,并结合逼近理想排序法对救援效率进行综合排序。以长江江苏段10个分支局的应急资源配置为例,获取各分支局的投入冗余值,并对其进行排序。结果表明,该模型能获取应急资源配置的冗余程度,从而分析水上应急资源配置效率,为海事主管机关优化水上应急资源配置提供借鉴。