氯化工艺在工业生产中广泛应用,但极易引发火灾、爆炸、中毒等事故。为全面识别和评估氯化工艺影响因素,确保生产过程的安全性和可靠性,提出了基于决策试验与评估实验法(Decision Making Trial and Evaluation Laboratory,DEMATEL)、解...氯化工艺在工业生产中广泛应用,但极易引发火灾、爆炸、中毒等事故。为全面识别和评估氯化工艺影响因素,确保生产过程的安全性和可靠性,提出了基于决策试验与评估实验法(Decision Making Trial and Evaluation Laboratory,DEMATEL)、解释结构模型(Interpretative Structural Modeling,ISM)和层次分析法(Analytic Hierarchy Process,AHP)的氯化工艺评价模型。首先,确定了36个氯化工艺评价指标,运用DEMATEL和ISM,分析氯化工艺影响因素间的因果关系和关键影响因素,并建立递阶层次结构模型。其次,以制备四氯化钛的氯化工艺为例,利用AHP计算因素的层次权重,并将由DEMATEL得到的中心度融入层次权重中,确定该氯化工艺影响因素综合权重。该模型在氯化工艺安全评价中具有较好的可行性和实用性,可为风险预警提供支持,推动化工工艺的安全稳定发展。展开更多
A method of system structural analysis based on decision making trial and evaluation laboratory together with interpretative structural modeling(DEMATEL-ISM) and entropy is proposed to clarify system structure of comm...A method of system structural analysis based on decision making trial and evaluation laboratory together with interpretative structural modeling(DEMATEL-ISM) and entropy is proposed to clarify system structure of communication networks and analyze mutual influencing degree between different networks.Mutual influencing degree and importance degree of elements are both considered to determine weights of elements,and the entropy of expert judgment results is used to omit unimportant influence relation and simplify system structure.Structural analysis on communication networks system shows that the proposed method can quantificationally present weights and mutual influencing degree of elements,and reasonably simplify system structure.The results indicate the rationality and feasibility of the method.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
文摘氯化工艺在工业生产中广泛应用,但极易引发火灾、爆炸、中毒等事故。为全面识别和评估氯化工艺影响因素,确保生产过程的安全性和可靠性,提出了基于决策试验与评估实验法(Decision Making Trial and Evaluation Laboratory,DEMATEL)、解释结构模型(Interpretative Structural Modeling,ISM)和层次分析法(Analytic Hierarchy Process,AHP)的氯化工艺评价模型。首先,确定了36个氯化工艺评价指标,运用DEMATEL和ISM,分析氯化工艺影响因素间的因果关系和关键影响因素,并建立递阶层次结构模型。其次,以制备四氯化钛的氯化工艺为例,利用AHP计算因素的层次权重,并将由DEMATEL得到的中心度融入层次权重中,确定该氯化工艺影响因素综合权重。该模型在氯化工艺安全评价中具有较好的可行性和实用性,可为风险预警提供支持,推动化工工艺的安全稳定发展。
基金Project(20141996018)supported by Aerospace Science Foundation of ChinaProject(2012JZ8005)supported by the Natural Science Fundamental Research Planned Project of Shanxi Province,China
文摘A method of system structural analysis based on decision making trial and evaluation laboratory together with interpretative structural modeling(DEMATEL-ISM) and entropy is proposed to clarify system structure of communication networks and analyze mutual influencing degree between different networks.Mutual influencing degree and importance degree of elements are both considered to determine weights of elements,and the entropy of expert judgment results is used to omit unimportant influence relation and simplify system structure.Structural analysis on communication networks system shows that the proposed method can quantificationally present weights and mutual influencing degree of elements,and reasonably simplify system structure.The results indicate the rationality and feasibility of the method.
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。
