Decision Making Trial and Evaluation Laboratory(DEMATEL)method is a powerful tool for understanding and visualizing the causal relationships among factors in complex decision-making problems.The method uses diagrams a...Decision Making Trial and Evaluation Laboratory(DEMATEL)method is a powerful tool for understanding and visualizing the causal relationships among factors in complex decision-making problems.The method uses diagrams and matrixes to map out the causal relationships and interdependencies among factors,allowing decision-makers to identify key drivers and potential solutions to the problem.DEMATEL has a wide range of application areas,including supply chain management,environmental planning,healthcare,finance,and engineering,among others.The DEMATEL method is a valuable tool for decision-makers who need to understand the complex causal relationships among factors in order to make informed decisions.The method provides a structured approach for analyzing and prioritizing factors and for identifying potential solutions to complex problems.This paper describes the main features of this method,its application areas as well as the main process steps in the DEMATEL method.展开更多
为了解决装配式建筑吊装施工安全风险评估体系缺失、演化路径不清的共性问题,提高施工安全科学管理水平,提出了一种基于改进决策试验与实验室评估法(Decision Making Trial and Evaluation Laboratory,DEMATEL)的关键风险识别与演化路...为了解决装配式建筑吊装施工安全风险评估体系缺失、演化路径不清的共性问题,提高施工安全科学管理水平,提出了一种基于改进决策试验与实验室评估法(Decision Making Trial and Evaluation Laboratory,DEMATEL)的关键风险识别与演化路径分析方法。基于扎根理论构建装配式建筑吊装施工安全风险评价指标体系,利用基于组合数有序加权算子(Combination Ordered Weighted Averaging,C-OWA)改进直接影响矩阵,建立DEMATEL模型决策矩阵,并通过因果关系图识别关键风险因素,探究关键风险演化路径,以武汉市某工程项目为背景开展实证研究。结果表明:该项目存在X_(1)(工人的专业水平与素质差)、X_(5)(工人的技能培训与安全教育不到位)、X_(15)(人员没有进行定期的安全培训)、X_(18)(现场施工安全管理水平低)、X_(19)(风险意识缺乏)等关键风险因素;在4条基础路径和2条复合路径中,复合路径的权重高于基础路径,随着关键风险之间直接和间接作用的复杂化,发生风险事件的可能性将逐步增加;复合路径除了通过基础路径与关键风险耦合得到以外,还可以通过基础路径的相互作用演化得到。展开更多
为探究地铁深基坑施工安全风险因素动态作用规律,科学预防施工安全事故,针对目前缺乏因素系统识别、因果关系量化和动态推理分析等共性问题,提出一种基于决策试验和评估实验室(Decision Making Trial and Evaluation Laboratory DEMATEL...为探究地铁深基坑施工安全风险因素动态作用规律,科学预防施工安全事故,针对目前缺乏因素系统识别、因果关系量化和动态推理分析等共性问题,提出一种基于决策试验和评估实验室(Decision Making Trial and Evaluation Laboratory DEMATEL)与模糊认知图(Fuzzy Cognitive Map,FCM)的地铁深基坑施工安全风险分析方法。首先,通过理论分析与文献梳理,采用扎根理论识别风险因素;其次,结合专家调研与量化分析,利用DEMATEL方法分析风险因素的因果关系;再次,将DEMATAL决策矩阵转化为FCM模型的交互作用矩阵,展开风险因素的预测与诊断推理分析;最后,选取案例进行实证,验证模型方法的可用性与有效性。结果显示:因素X_(1)(人员安全风险意识)对其他因素的影响程度最高;因素X_(1)(人员安全风险意识)、X_(8)(安全施工组织设计方案)和X_(7)(施工安全风险管理措施)是排名前3的关键风险因素;完善安全施工组织设计方案是最有效的管控对策。展开更多
为从系统整体角度完成对起落架收放系统的风险辨识和影响分析,将系统理论过程分析(Systematic Theory Process Analysis,STPA)与决策实验室分析-解释结构模型(Decision Making Trial and Evaluation Laboratory Interpretive Structural...为从系统整体角度完成对起落架收放系统的风险辨识和影响分析,将系统理论过程分析(Systematic Theory Process Analysis,STPA)与决策实验室分析-解释结构模型(Decision Making Trial and Evaluation Laboratory Interpretive Structural Modeling,DEMATEL-ISM)相结合来开展分析。首先,定义事故和系统级危险,以民机进近阶段放下起落架为例,运用STPA完成对风险因素的系统化辨识;其次,基于最大平均熵减(Maximum Mean De-entropy,MMDE)算法帮助DEMATEL-ISM模型确定阈值,完成对风险因素影响的重要性分析并识别可能引发系统级危险的风险传递路径,据此挖掘关键致因场景,以给出风险预防建议。结果显示:线路性能退化或失效、位置作动控制组件(Position Action Control Unit,PACU)核心处理器故障为关键原因因素,收放作动筒作动异常、机组成员操作不当、起落架指示灯显示异常、起落架液压选择阀作动异常、PACU信息接收有误为关键结果因素,这些因素均涉及多条可能引发系统级危险的风险传递路径,应予以重点控制。展开更多
针对智能航电系统在非线性耦合运行场景下产生的预期功能安全(safety of the intended functionality,SOTIF)问题,提出一种将系统理论过程分析(systematic theory process analysis,STPA)与决策试验与评价实验法(decision-making trial ...针对智能航电系统在非线性耦合运行场景下产生的预期功能安全(safety of the intended functionality,SOTIF)问题,提出一种将系统理论过程分析(systematic theory process analysis,STPA)与决策试验与评价实验法(decision-making trial and evaluation laboratory,DEMATEL)相结合的致因分析框架。首先,在定义系统级危险的基础上构建安全控制结构,识别其不安全控制行为并提取与智能化缺陷相关的STPA致因要素。接下来,引入毕达哥拉斯模糊加权平均算子和闵可夫斯基距离对传统DEMATEL方法进行优化,专家根据控制反馈回路对致因要素进行评价并计算其中心度与原因度。最后,分析STPA致因要素与SOTIF致因属性之间的映射关系,给出关键致因要素的风险减缓措施。以单一飞行员驾驶(single-pilot operation,SPO)模式下的虚拟驾驶员助理系统为例说明了所提方法的可行性与有效性。研究结果表明,改进的STPA-DEMATEL方法可以有效识别关键致因要素,且能够克服专家评价的模糊性与不确定性,为智能航电系统的安全性设计提供了参考依据。展开更多
With the development of central-private enterprises integration,selecting suitable key suppliers are able to provide core components for smart complex equipment.We consider selecting suitable key suppliers from matchi...With the development of central-private enterprises integration,selecting suitable key suppliers are able to provide core components for smart complex equipment.We consider selecting suitable key suppliers from matching perspective,for it not only satisfies natural development of smart complex equipment,it is also a good implementation of equipment project in central-private enterprises integration context.In in this paper,we carry out two parts of research,one is evaluation attributes based on comprehensive analysis,and the other is matching process between key suppliers and core components based on the matching attribute.In practical analysis process,we employ comprehensive evaluated analysis methods to acquire relevant attributes for the matching process that follows.In the analysis process,we adopt entropy-maximum deviation method(MDM)-decision-making trial and evaluation laboratory(DEMATEL)-technique for order preference by similarity to an ideal solution(TOPSIS)to obtain a comprehensive analysis.The entropy-MDM is applied to get weight value,DEMATEL is utilized to obtain internal relations,and TOPSIS is adopted to get ideal evaluated solution.We consider aggregating two types of evaluation information according to similarities of smart complex equipment based on the combination between geometric mean and arithmetic mean.Moreover,based on the aforementioned attributes and generalized power Heronian mean operator,we aggregate preference information to acquire relevant satisfaction degree,then combine the constructed matching model to get suitable key supplier.Through comprehensive analysis of selecting suitable suppliers,we know that two-sided matching and information aggregation can provide more research perspectives for smart complex equipment.Through analysis for relevant factors,we find that leading role and service level are also significant for the smart complex equipment development process.展开更多
针对城市燃气管道风险评价时存在各因素相互作用会影响评价结果的问题,通过分析以往燃气事故发生原因、行业专家意见和相关规范标准,筛选整理出4项一级指标和19项二级指标,建立城市燃气管道风险评价指标体系。为保证城市燃气管道风险评...针对城市燃气管道风险评价时存在各因素相互作用会影响评价结果的问题,通过分析以往燃气事故发生原因、行业专家意见和相关规范标准,筛选整理出4项一级指标和19项二级指标,建立城市燃气管道风险评价指标体系。为保证城市燃气管道风险评价的准确性,引入灰色理论与决策试验法(Decision Making Trial and Evaluation Laboratory,DEMATEL)。首先,基于此方法分析各因素之间的影响关系;然后,得出各指标因素在评价指标体系中的重要程度;最后,对中心度进行归一化处理得到各影响因素的权重,结合模糊综合评价的方法对燃气管道进行风险评价。结果表明:阴极保护失效、管道运行年限、管道保护装置和人为破坏是导致燃气管道失效最重要的4个因素,燃气管道的风险等级为中等;分析结果与实际工程相吻合,证明该方法能够有效评估燃气管道风险。展开更多
为研究管制单位风险的动态性,提高风险评估的准确性,预防风险事故的发生,提出基于毕达哥拉斯模糊、试验与评估实验室(Decision Making Trial and Evaluation Laboratory,DEMATEL)、贝叶斯网络(Bayesian Network,BN)和模糊损失率的管制...为研究管制单位风险的动态性,提高风险评估的准确性,预防风险事故的发生,提出基于毕达哥拉斯模糊、试验与评估实验室(Decision Making Trial and Evaluation Laboratory,DEMATEL)、贝叶斯网络(Bayesian Network,BN)和模糊损失率的管制单位动态风险评估模型。首先识别管制单位风险因素;其次应用毕达哥拉斯模糊和DEMATEL模型探究风险因素之间的相互关系;再次将因素间的相互关系映射到BN,构建管制单位风险演化过程;然后确定先验概率,并以前兆数据作为输入信息,推导计算管制单位的动态风险概率;最后利用模糊损失率量化风险后果,计算管制单位的动态风险评估值。以某管制单位为例,对构建的管制单位动态风险评估模型进行了实证研究。结果表明:特情处置预案不合理等高严重后果概率持续上升的风险因素是该管制单位的风险管控的重点;t1~t5时间段该管制单位的动态风险评估值从1.035×10-2上升到1.1063×10-2。构建的管制单位动态风险评估模型克服了管制传统风险评估模型无法捕捉动态特征和过度依靠专家经验的不足,提高了评估的准确性,为管制单位控制和减少风险提供了决策支持。展开更多
文摘Decision Making Trial and Evaluation Laboratory(DEMATEL)method is a powerful tool for understanding and visualizing the causal relationships among factors in complex decision-making problems.The method uses diagrams and matrixes to map out the causal relationships and interdependencies among factors,allowing decision-makers to identify key drivers and potential solutions to the problem.DEMATEL has a wide range of application areas,including supply chain management,environmental planning,healthcare,finance,and engineering,among others.The DEMATEL method is a valuable tool for decision-makers who need to understand the complex causal relationships among factors in order to make informed decisions.The method provides a structured approach for analyzing and prioritizing factors and for identifying potential solutions to complex problems.This paper describes the main features of this method,its application areas as well as the main process steps in the DEMATEL method.
文摘为了解决装配式建筑吊装施工安全风险评估体系缺失、演化路径不清的共性问题,提高施工安全科学管理水平,提出了一种基于改进决策试验与实验室评估法(Decision Making Trial and Evaluation Laboratory,DEMATEL)的关键风险识别与演化路径分析方法。基于扎根理论构建装配式建筑吊装施工安全风险评价指标体系,利用基于组合数有序加权算子(Combination Ordered Weighted Averaging,C-OWA)改进直接影响矩阵,建立DEMATEL模型决策矩阵,并通过因果关系图识别关键风险因素,探究关键风险演化路径,以武汉市某工程项目为背景开展实证研究。结果表明:该项目存在X_(1)(工人的专业水平与素质差)、X_(5)(工人的技能培训与安全教育不到位)、X_(15)(人员没有进行定期的安全培训)、X_(18)(现场施工安全管理水平低)、X_(19)(风险意识缺乏)等关键风险因素;在4条基础路径和2条复合路径中,复合路径的权重高于基础路径,随着关键风险之间直接和间接作用的复杂化,发生风险事件的可能性将逐步增加;复合路径除了通过基础路径与关键风险耦合得到以外,还可以通过基础路径的相互作用演化得到。
文摘为探究地铁深基坑施工安全风险因素动态作用规律,科学预防施工安全事故,针对目前缺乏因素系统识别、因果关系量化和动态推理分析等共性问题,提出一种基于决策试验和评估实验室(Decision Making Trial and Evaluation Laboratory DEMATEL)与模糊认知图(Fuzzy Cognitive Map,FCM)的地铁深基坑施工安全风险分析方法。首先,通过理论分析与文献梳理,采用扎根理论识别风险因素;其次,结合专家调研与量化分析,利用DEMATEL方法分析风险因素的因果关系;再次,将DEMATAL决策矩阵转化为FCM模型的交互作用矩阵,展开风险因素的预测与诊断推理分析;最后,选取案例进行实证,验证模型方法的可用性与有效性。结果显示:因素X_(1)(人员安全风险意识)对其他因素的影响程度最高;因素X_(1)(人员安全风险意识)、X_(8)(安全施工组织设计方案)和X_(7)(施工安全风险管理措施)是排名前3的关键风险因素;完善安全施工组织设计方案是最有效的管控对策。
文摘为从系统整体角度完成对起落架收放系统的风险辨识和影响分析,将系统理论过程分析(Systematic Theory Process Analysis,STPA)与决策实验室分析-解释结构模型(Decision Making Trial and Evaluation Laboratory Interpretive Structural Modeling,DEMATEL-ISM)相结合来开展分析。首先,定义事故和系统级危险,以民机进近阶段放下起落架为例,运用STPA完成对风险因素的系统化辨识;其次,基于最大平均熵减(Maximum Mean De-entropy,MMDE)算法帮助DEMATEL-ISM模型确定阈值,完成对风险因素影响的重要性分析并识别可能引发系统级危险的风险传递路径,据此挖掘关键致因场景,以给出风险预防建议。结果显示:线路性能退化或失效、位置作动控制组件(Position Action Control Unit,PACU)核心处理器故障为关键原因因素,收放作动筒作动异常、机组成员操作不当、起落架指示灯显示异常、起落架液压选择阀作动异常、PACU信息接收有误为关键结果因素,这些因素均涉及多条可能引发系统级危险的风险传递路径,应予以重点控制。
文摘针对智能航电系统在非线性耦合运行场景下产生的预期功能安全(safety of the intended functionality,SOTIF)问题,提出一种将系统理论过程分析(systematic theory process analysis,STPA)与决策试验与评价实验法(decision-making trial and evaluation laboratory,DEMATEL)相结合的致因分析框架。首先,在定义系统级危险的基础上构建安全控制结构,识别其不安全控制行为并提取与智能化缺陷相关的STPA致因要素。接下来,引入毕达哥拉斯模糊加权平均算子和闵可夫斯基距离对传统DEMATEL方法进行优化,专家根据控制反馈回路对致因要素进行评价并计算其中心度与原因度。最后,分析STPA致因要素与SOTIF致因属性之间的映射关系,给出关键致因要素的风险减缓措施。以单一飞行员驾驶(single-pilot operation,SPO)模式下的虚拟驾驶员助理系统为例说明了所提方法的可行性与有效性。研究结果表明,改进的STPA-DEMATEL方法可以有效识别关键致因要素,且能够克服专家评价的模糊性与不确定性,为智能航电系统的安全性设计提供了参考依据。
文摘With the development of central-private enterprises integration,selecting suitable key suppliers are able to provide core components for smart complex equipment.We consider selecting suitable key suppliers from matching perspective,for it not only satisfies natural development of smart complex equipment,it is also a good implementation of equipment project in central-private enterprises integration context.In in this paper,we carry out two parts of research,one is evaluation attributes based on comprehensive analysis,and the other is matching process between key suppliers and core components based on the matching attribute.In practical analysis process,we employ comprehensive evaluated analysis methods to acquire relevant attributes for the matching process that follows.In the analysis process,we adopt entropy-maximum deviation method(MDM)-decision-making trial and evaluation laboratory(DEMATEL)-technique for order preference by similarity to an ideal solution(TOPSIS)to obtain a comprehensive analysis.The entropy-MDM is applied to get weight value,DEMATEL is utilized to obtain internal relations,and TOPSIS is adopted to get ideal evaluated solution.We consider aggregating two types of evaluation information according to similarities of smart complex equipment based on the combination between geometric mean and arithmetic mean.Moreover,based on the aforementioned attributes and generalized power Heronian mean operator,we aggregate preference information to acquire relevant satisfaction degree,then combine the constructed matching model to get suitable key supplier.Through comprehensive analysis of selecting suitable suppliers,we know that two-sided matching and information aggregation can provide more research perspectives for smart complex equipment.Through analysis for relevant factors,we find that leading role and service level are also significant for the smart complex equipment development process.
文摘针对城市燃气管道风险评价时存在各因素相互作用会影响评价结果的问题,通过分析以往燃气事故发生原因、行业专家意见和相关规范标准,筛选整理出4项一级指标和19项二级指标,建立城市燃气管道风险评价指标体系。为保证城市燃气管道风险评价的准确性,引入灰色理论与决策试验法(Decision Making Trial and Evaluation Laboratory,DEMATEL)。首先,基于此方法分析各因素之间的影响关系;然后,得出各指标因素在评价指标体系中的重要程度;最后,对中心度进行归一化处理得到各影响因素的权重,结合模糊综合评价的方法对燃气管道进行风险评价。结果表明:阴极保护失效、管道运行年限、管道保护装置和人为破坏是导致燃气管道失效最重要的4个因素,燃气管道的风险等级为中等;分析结果与实际工程相吻合,证明该方法能够有效评估燃气管道风险。
文摘为研究管制单位风险的动态性,提高风险评估的准确性,预防风险事故的发生,提出基于毕达哥拉斯模糊、试验与评估实验室(Decision Making Trial and Evaluation Laboratory,DEMATEL)、贝叶斯网络(Bayesian Network,BN)和模糊损失率的管制单位动态风险评估模型。首先识别管制单位风险因素;其次应用毕达哥拉斯模糊和DEMATEL模型探究风险因素之间的相互关系;再次将因素间的相互关系映射到BN,构建管制单位风险演化过程;然后确定先验概率,并以前兆数据作为输入信息,推导计算管制单位的动态风险概率;最后利用模糊损失率量化风险后果,计算管制单位的动态风险评估值。以某管制单位为例,对构建的管制单位动态风险评估模型进行了实证研究。结果表明:特情处置预案不合理等高严重后果概率持续上升的风险因素是该管制单位的风险管控的重点;t1~t5时间段该管制单位的动态风险评估值从1.035×10-2上升到1.1063×10-2。构建的管制单位动态风险评估模型克服了管制传统风险评估模型无法捕捉动态特征和过度依靠专家经验的不足,提高了评估的准确性,为管制单位控制和减少风险提供了决策支持。