In view of the low level testability of armored equipment,the important significance of armored equipment testability growth is discussed in this paper.The failure mode effects and criticality analysis( FMECA) method ...In view of the low level testability of armored equipment,the important significance of armored equipment testability growth is discussed in this paper.The failure mode effects and criticality analysis( FMECA) method to realize testability growth is introduced.Centering on the testability growth demands of new armored equipment,the deficiencies of traditional FMECA are analyzed.And an enhanced FMECA( EFMECA) method is proposed.The method increases the analysis contents,combines the information before the failure occurrence and impending failure modes together organically.Then the failure symptoms is analyzed,the failure modes and effects is determined,and the state development trend is predicted.Finally,the application of EFMECA method is illustrated by the example of the failure mode of typical armored equipment engine.展开更多
A new method of system failure analysis was proposed. First, considering the relationships between the failure subsystems,the decision making trial and evaluation laboratory(DEMATEL) method was used to calculate the d...A new method of system failure analysis was proposed. First, considering the relationships between the failure subsystems,the decision making trial and evaluation laboratory(DEMATEL) method was used to calculate the degree of correlation between the failure subsystems, analyze the combined effect of related failures, and obtain the degree of correlation by using the directed graph and matrix operations. Then, the interpretative structural modeling(ISM) method was combined to intuitively show the logical relationship of many failure subsystems and their influences on each other by using multilevel hierarchical structure model and obtaining the critical subsystems. Finally, failure mode effects and criticality analysis(FMECA) was used to perform a qualitative hazard analysis of critical subsystems, determine the critical failure mode, and clarify the direction of reliability improvement.Through an example, the result demonstrates that the proposed method can be efficiently applied to system failure analysis problems.展开更多
The paper describes modern technologies of Computer Network Reliability. Software tool is developed to estimate of the CCN critical failure probability (construction of a criticality matrix) by results of the FME(C)A-...The paper describes modern technologies of Computer Network Reliability. Software tool is developed to estimate of the CCN critical failure probability (construction of a criticality matrix) by results of the FME(C)A-technique. The internal information factors, such as collisions and congestion of switchboards, routers and servers, influence on a network reliability and safety (besides of hardware and software reliability and external extreme factors). The means and features of Failures Modes and Effects (Critical) Analysis (FME(C)A) for reliability and criticality analysis of corporate computer networks (CCN) are considered. The examples of FME(C)A-Technique for structured cable system (SCS) is given. We also discuss measures that can be used for criticality analysis and possible means of criticality reduction. Finally, we describe a technique and basic principles of dependable development and deployment of computer networks that are based on results of FMECA analysis and procedures of optimization choice of means for fault-tolerance ensuring.展开更多
To analysis the early failures of machining centers,the failure mode effect and criticality analysis( FMECA) method was used. Based on the failure data collected from production lines in test run,all the failure modes...To analysis the early failures of machining centers,the failure mode effect and criticality analysis( FMECA) method was used. Based on the failure data collected from production lines in test run,all the failure modes of machining centers were summarized and criticality of all subsystems is figured out. And the process of FMECA was improved. The most critical subsystem was manipulator subsystem. The most critical failure mode was impacted manipulator. Reasons and effect of some important failure modes were analyzed. And some suggestions to solve failures were given.展开更多
目的观察失效模式与效应分析(Failure mode and effect analysis,FMEA)模式下构建急诊危重症患者临床护理路径管理的效果。方法淮安市第一人民医院于2019年1月开始施行FMEA模式下构建急诊危重症患者临床护理路径管理(简称FMEA临床路径)...目的观察失效模式与效应分析(Failure mode and effect analysis,FMEA)模式下构建急诊危重症患者临床护理路径管理的效果。方法淮安市第一人民医院于2019年1月开始施行FMEA模式下构建急诊危重症患者临床护理路径管理(简称FMEA临床路径),利用回顾性分析方法收集2018年1月-2018年12月就诊本院的急诊危重症患者82例(对照组),利用倾向性评分匹配法在2019年2月-2020年6月就诊患者中选择与对照组具有相同性别、年龄、急性生理和慢性健康评分(APACHEⅡ)、发病至入院时间、疾病类别的急诊危重症患者82例(观察组),两组匹配比例为1∶1,用于确定FMEA临床路径前后患者的抢救室滞留时间、抢救时间、住院时间、危重症交接时间、抢救成功率、转运相关不良事件发生情况、并发症控制情况差异。结果观察组患者抢救室滞留时间、抢救时间、危重症交接时间,转运期间血压下降、呼吸骤停、心搏骤停、管道脱落/堵塞、药品物品不齐、交接不清、转运延迟以及压疮、下肢深静脉血栓、跌倒发生率及并发症总发生率均低于对照组(P<0.05);观察组患者抢救成功率为95.12%(78/82),高于对照组抢救成功率(P<0.05);观察组健康教育完成度评分高于对照组,差异有统计学意义(P<0.05)。结论FMEA模式下构建急诊危重症患者临床护理路径管理方案能够有效降低抢救室滞留时间、抢救时间、危重症交接时间、转运期间风险事件及抢救后压疮、下肢深静脉血栓、跌倒并发症风险,有效提升抢救成功率,有助于提升护理人员健康教育完成度。展开更多
The unmanned aerial vehicles( UAV) has been becoming more and more important in the aviation industry.Despite the superior performance and advanced technology,major accident of UAV happens frequently due to the impact...The unmanned aerial vehicles( UAV) has been becoming more and more important in the aviation industry.Despite the superior performance and advanced technology,major accident of UAV happens frequently due to the impact of their systems,long distance of remote control and skill of manipulator technology.According to the application of engineering application,failure mode effects and criticality analysis( FMECA),failure reporting analysis and corrective action comprehensive analysis systems( FRACAS)and fault tree analysis( FTA)( 3 F) were combined.And also a set of user-friendly,more time,more efficient and accurate reliability analysis system were explored.展开更多
目的解决水产品冷链物流损耗率高的问题,最大程度地提高水产品在冷链物流全流程中的质量安全。方法采用危害分析与关键控制点(Hazard Analysis and Critical Control Point,HACCP)质量控制体系,详细解释水产品冷链物流的各个环节,并绘...目的解决水产品冷链物流损耗率高的问题,最大程度地提高水产品在冷链物流全流程中的质量安全。方法采用危害分析与关键控制点(Hazard Analysis and Critical Control Point,HACCP)质量控制体系,详细解释水产品冷链物流的各个环节,并绘制其流程图,结合流程图分析各个环节的潜在危害,并通过潜在失效模式及后果分析(Failure Mode and Effects Analysis,FMEA)定量确定关键控制点,同时制定HACCP计划表。采用PDCA(Plan、Do、Check、Action)和SDCA(Standardization、Do、Check、Action)双循环优化方法分析流程存在的问题,并提出优化措施,绘制优化后水产品冷链物流的流程图。结果确定水产品养殖捕捞、冷藏加工、冷冻贮存、冷冻运输、冷藏销售5个环节为关键控制点。结论对关键控制点的潜在危害提出预防措施,并进行流程优化,尤其需要重点关注水产品的养殖捕捞和水产品冷藏销售环节,通过改善全流程的温度控制水平,加强对致病菌污染的监管,有效地防范并控制水产品冷链物流质量风险。展开更多
超深水打桩锤系统的性能直接影响大型海洋油气平台的建设进度。为深入研究超深水打桩锤系统的故障机理,对系统进行可靠性分析与分配研究。首先,对超深水打桩锤系统进行故障模式与影响分析(failure mode and effect analysis,FMEA),并基...超深水打桩锤系统的性能直接影响大型海洋油气平台的建设进度。为深入研究超深水打桩锤系统的故障机理,对系统进行可靠性分析与分配研究。首先,对超深水打桩锤系统进行故障模式与影响分析(failure mode and effect analysis,FMEA),并基于FMEA结果提出了一种改进的危害性分析(criticality analysis,CA)方法。然后,运用改进的AGREE(advisory group on reliability of electronic equipment,电子设备可靠性咨询组)分配法及基于FMECA(failure mode,effect and criticality analysis,故障模式、影响与危害性分析)的可靠性分配方法,对超深水打桩锤系统的子系统和零部件依次进行可靠性分配研究。最后,在MATLAB App Designer开发环境下对超深水打桩锤系统的CA及可靠性分配过程进行可视化界面设计。结果表明,超深水打桩锤系统共有27种故障模式,钢桩等9个零部件为系统薄弱环节;经一、二次可靠性分配后,系统可靠度分别为0.99906322,0.99906327。超深水打桩锤系统的可靠性研究识别了系统的薄弱环节,为其国产化设计提供了一定的理论指导。展开更多
文摘In view of the low level testability of armored equipment,the important significance of armored equipment testability growth is discussed in this paper.The failure mode effects and criticality analysis( FMECA) method to realize testability growth is introduced.Centering on the testability growth demands of new armored equipment,the deficiencies of traditional FMECA are analyzed.And an enhanced FMECA( EFMECA) method is proposed.The method increases the analysis contents,combines the information before the failure occurrence and impending failure modes together organically.Then the failure symptoms is analyzed,the failure modes and effects is determined,and the state development trend is predicted.Finally,the application of EFMECA method is illustrated by the example of the failure mode of typical armored equipment engine.
基金Project(51275205)supported by the National Natural Science Foundation of China
文摘A new method of system failure analysis was proposed. First, considering the relationships between the failure subsystems,the decision making trial and evaluation laboratory(DEMATEL) method was used to calculate the degree of correlation between the failure subsystems, analyze the combined effect of related failures, and obtain the degree of correlation by using the directed graph and matrix operations. Then, the interpretative structural modeling(ISM) method was combined to intuitively show the logical relationship of many failure subsystems and their influences on each other by using multilevel hierarchical structure model and obtaining the critical subsystems. Finally, failure mode effects and criticality analysis(FMECA) was used to perform a qualitative hazard analysis of critical subsystems, determine the critical failure mode, and clarify the direction of reliability improvement.Through an example, the result demonstrates that the proposed method can be efficiently applied to system failure analysis problems.
文摘The paper describes modern technologies of Computer Network Reliability. Software tool is developed to estimate of the CCN critical failure probability (construction of a criticality matrix) by results of the FME(C)A-technique. The internal information factors, such as collisions and congestion of switchboards, routers and servers, influence on a network reliability and safety (besides of hardware and software reliability and external extreme factors). The means and features of Failures Modes and Effects (Critical) Analysis (FME(C)A) for reliability and criticality analysis of corporate computer networks (CCN) are considered. The examples of FME(C)A-Technique for structured cable system (SCS) is given. We also discuss measures that can be used for criticality analysis and possible means of criticality reduction. Finally, we describe a technique and basic principles of dependable development and deployment of computer networks that are based on results of FMECA analysis and procedures of optimization choice of means for fault-tolerance ensuring.
基金National Science and Technology Major Project of China(No.2013ZX04012071)
文摘To analysis the early failures of machining centers,the failure mode effect and criticality analysis( FMECA) method was used. Based on the failure data collected from production lines in test run,all the failure modes of machining centers were summarized and criticality of all subsystems is figured out. And the process of FMECA was improved. The most critical subsystem was manipulator subsystem. The most critical failure mode was impacted manipulator. Reasons and effect of some important failure modes were analyzed. And some suggestions to solve failures were given.
文摘目的观察失效模式与效应分析(Failure mode and effect analysis,FMEA)模式下构建急诊危重症患者临床护理路径管理的效果。方法淮安市第一人民医院于2019年1月开始施行FMEA模式下构建急诊危重症患者临床护理路径管理(简称FMEA临床路径),利用回顾性分析方法收集2018年1月-2018年12月就诊本院的急诊危重症患者82例(对照组),利用倾向性评分匹配法在2019年2月-2020年6月就诊患者中选择与对照组具有相同性别、年龄、急性生理和慢性健康评分(APACHEⅡ)、发病至入院时间、疾病类别的急诊危重症患者82例(观察组),两组匹配比例为1∶1,用于确定FMEA临床路径前后患者的抢救室滞留时间、抢救时间、住院时间、危重症交接时间、抢救成功率、转运相关不良事件发生情况、并发症控制情况差异。结果观察组患者抢救室滞留时间、抢救时间、危重症交接时间,转运期间血压下降、呼吸骤停、心搏骤停、管道脱落/堵塞、药品物品不齐、交接不清、转运延迟以及压疮、下肢深静脉血栓、跌倒发生率及并发症总发生率均低于对照组(P<0.05);观察组患者抢救成功率为95.12%(78/82),高于对照组抢救成功率(P<0.05);观察组健康教育完成度评分高于对照组,差异有统计学意义(P<0.05)。结论FMEA模式下构建急诊危重症患者临床护理路径管理方案能够有效降低抢救室滞留时间、抢救时间、危重症交接时间、转运期间风险事件及抢救后压疮、下肢深静脉血栓、跌倒并发症风险,有效提升抢救成功率,有助于提升护理人员健康教育完成度。
基金Naional Natural Science Foundntion of China(No.71761030)
文摘The unmanned aerial vehicles( UAV) has been becoming more and more important in the aviation industry.Despite the superior performance and advanced technology,major accident of UAV happens frequently due to the impact of their systems,long distance of remote control and skill of manipulator technology.According to the application of engineering application,failure mode effects and criticality analysis( FMECA),failure reporting analysis and corrective action comprehensive analysis systems( FRACAS)and fault tree analysis( FTA)( 3 F) were combined.And also a set of user-friendly,more time,more efficient and accurate reliability analysis system were explored.
文摘目的解决水产品冷链物流损耗率高的问题,最大程度地提高水产品在冷链物流全流程中的质量安全。方法采用危害分析与关键控制点(Hazard Analysis and Critical Control Point,HACCP)质量控制体系,详细解释水产品冷链物流的各个环节,并绘制其流程图,结合流程图分析各个环节的潜在危害,并通过潜在失效模式及后果分析(Failure Mode and Effects Analysis,FMEA)定量确定关键控制点,同时制定HACCP计划表。采用PDCA(Plan、Do、Check、Action)和SDCA(Standardization、Do、Check、Action)双循环优化方法分析流程存在的问题,并提出优化措施,绘制优化后水产品冷链物流的流程图。结果确定水产品养殖捕捞、冷藏加工、冷冻贮存、冷冻运输、冷藏销售5个环节为关键控制点。结论对关键控制点的潜在危害提出预防措施,并进行流程优化,尤其需要重点关注水产品的养殖捕捞和水产品冷藏销售环节,通过改善全流程的温度控制水平,加强对致病菌污染的监管,有效地防范并控制水产品冷链物流质量风险。
文摘超深水打桩锤系统的性能直接影响大型海洋油气平台的建设进度。为深入研究超深水打桩锤系统的故障机理,对系统进行可靠性分析与分配研究。首先,对超深水打桩锤系统进行故障模式与影响分析(failure mode and effect analysis,FMEA),并基于FMEA结果提出了一种改进的危害性分析(criticality analysis,CA)方法。然后,运用改进的AGREE(advisory group on reliability of electronic equipment,电子设备可靠性咨询组)分配法及基于FMECA(failure mode,effect and criticality analysis,故障模式、影响与危害性分析)的可靠性分配方法,对超深水打桩锤系统的子系统和零部件依次进行可靠性分配研究。最后,在MATLAB App Designer开发环境下对超深水打桩锤系统的CA及可靠性分配过程进行可视化界面设计。结果表明,超深水打桩锤系统共有27种故障模式,钢桩等9个零部件为系统薄弱环节;经一、二次可靠性分配后,系统可靠度分别为0.99906322,0.99906327。超深水打桩锤系统的可靠性研究识别了系统的薄弱环节,为其国产化设计提供了一定的理论指导。