针对港口水域(Port Water Area,PWA)交通环境风险评估过程中信息的不确定性、多样性及评估指标客观权重难以确定的问题,引入信息熵权法,基于对各种不确定信息熵的计算获得客观权重,进而建立基于熵权证据推理(Evidential Reasoning,ER)...针对港口水域(Port Water Area,PWA)交通环境风险评估过程中信息的不确定性、多样性及评估指标客观权重难以确定的问题,引入信息熵权法,基于对各种不确定信息熵的计算获得客观权重,进而建立基于熵权证据推理(Evidential Reasoning,ER)的评估模型.以台州港PWA交通环境风险评估为例对模型进行验证,结果表明该评估模型有效、可行.展开更多
疲劳驾驶已成为影响道路交通安全的重要因素,引入驾驶员实时疲劳检测结果,综合“人—车—路—环境”4个方面建立了基于Logistic回归模型的驾驶风险评估系统。将基于面部多特征的疲劳驾驶检测结果作为驾驶员驾驶状态输入,将通过高德地图...疲劳驾驶已成为影响道路交通安全的重要因素,引入驾驶员实时疲劳检测结果,综合“人—车—路—环境”4个方面建立了基于Logistic回归模型的驾驶风险评估系统。将基于面部多特征的疲劳驾驶检测结果作为驾驶员驾驶状态输入,将通过高德地图应用程序接口(application program interface,API)获得的驾驶员行驶道路线形以及当前环境能见度和车辆类型哑变量处理与变量赋值后作为自变量输入,建立了驾驶风险评估系统。在背光与对光的情况下模拟车载环境,分别对系统进行测试,结果显示疲劳状态识别率达90%以上;在评估模型方面,通过SPSS检验,模型总体有意义且拟合优度较高。展开更多
Major mineral hazard identifications should consider perilous types of fatal accidents in collieries from its definition, and then set existent hazardous objects and their relevant amount as referenced factors. Elimin...Major mineral hazard identifications should consider perilous types of fatal accidents in collieries from its definition, and then set existent hazardous objects and their relevant amount as referenced factors. Eliminating hazards in systems and decreasing risks are their essential purposes with help of hazard identification, risk evaluation and management. By pre-control on major hazards, fatal accidents are avoided, stuffs＇ safety and healthy are protected, levels of safe management are enhanced, and perpetual systems are built up finally. However, choosing the proper identification and evaluation is a problem all along. Based on specific condition in Jiangou Coal Mine, method of LEC was applied for hazard identification and evaluation in the pre-blasting process within horizontal section top-coal mechanized caving of steep seams. And control measures to of each hazard were put forward. The identification method combining qualitative and quantitative analysis. So, it is practical and operable for the method to develop the given scientific research and has a distinctive impact on high efficiency and safety products for pre-blasting in horizontal section top-coal mechanized caving of steep seams.展开更多
Transport risk assessment for the environment has two important aspects--problem solving model and solution veracity. Problem solving model is larger understanding of tasks interconnection, which represents in itself ...Transport risk assessment for the environment has two important aspects--problem solving model and solution veracity. Problem solving model is larger understanding of tasks interconnection, which represents in itself partial solution of general risk assessment. Veracity of solution means how the results are consistent with the reality. By researching of both aspects, it rises many unanswered questions. It is concerned about verification and validation of risk assessment results. By risk assessment for the environment it is possible to meet wide variety of more or less good soluble problems. It exists simple problems based on risk assessment of common traffic accidents connected with service charge outflow. On the other site, it exists complex problems of risk assessment connected with dangerous goods transport by traffic or pipelines. By simple problems solving there are not many questions about risk assessment veracity. It is possible to determine traffic accidents frequencies and service charge outflows consequences on the basis of examined events in transportation with great veracity. By complex problems the situation is quite different. The frequencies of large accidents are very low but the consequences for the environment may be large. Both are encumbered by large level of uncertainty. That is why the question is rising. To what degree, it is in these cases correct to make decision based on risk assessment.展开更多
文摘针对港口水域(Port Water Area,PWA)交通环境风险评估过程中信息的不确定性、多样性及评估指标客观权重难以确定的问题,引入信息熵权法,基于对各种不确定信息熵的计算获得客观权重,进而建立基于熵权证据推理(Evidential Reasoning,ER)的评估模型.以台州港PWA交通环境风险评估为例对模型进行验证,结果表明该评估模型有效、可行.
文摘疲劳驾驶已成为影响道路交通安全的重要因素,引入驾驶员实时疲劳检测结果,综合“人—车—路—环境”4个方面建立了基于Logistic回归模型的驾驶风险评估系统。将基于面部多特征的疲劳驾驶检测结果作为驾驶员驾驶状态输入,将通过高德地图应用程序接口(application program interface,API)获得的驾驶员行驶道路线形以及当前环境能见度和车辆类型哑变量处理与变量赋值后作为自变量输入,建立了驾驶风险评估系统。在背光与对光的情况下模拟车载环境,分别对系统进行测试,结果显示疲劳状态识别率达90%以上;在评估模型方面,通过SPSS检验,模型总体有意义且拟合优度较高。
基金Supported by the National Natural Science Foundation of China （1100202 l） the Doctoral Subject Foundation of the Ministry of Education of China （20070008012） the National High Technology Research and Development Program （2008AA062104）
文摘Major mineral hazard identifications should consider perilous types of fatal accidents in collieries from its definition, and then set existent hazardous objects and their relevant amount as referenced factors. Eliminating hazards in systems and decreasing risks are their essential purposes with help of hazard identification, risk evaluation and management. By pre-control on major hazards, fatal accidents are avoided, stuffs＇ safety and healthy are protected, levels of safe management are enhanced, and perpetual systems are built up finally. However, choosing the proper identification and evaluation is a problem all along. Based on specific condition in Jiangou Coal Mine, method of LEC was applied for hazard identification and evaluation in the pre-blasting process within horizontal section top-coal mechanized caving of steep seams. And control measures to of each hazard were put forward. The identification method combining qualitative and quantitative analysis. So, it is practical and operable for the method to develop the given scientific research and has a distinctive impact on high efficiency and safety products for pre-blasting in horizontal section top-coal mechanized caving of steep seams.
文摘Transport risk assessment for the environment has two important aspects--problem solving model and solution veracity. Problem solving model is larger understanding of tasks interconnection, which represents in itself partial solution of general risk assessment. Veracity of solution means how the results are consistent with the reality. By researching of both aspects, it rises many unanswered questions. It is concerned about verification and validation of risk assessment results. By risk assessment for the environment it is possible to meet wide variety of more or less good soluble problems. It exists simple problems based on risk assessment of common traffic accidents connected with service charge outflow. On the other site, it exists complex problems of risk assessment connected with dangerous goods transport by traffic or pipelines. By simple problems solving there are not many questions about risk assessment veracity. It is possible to determine traffic accidents frequencies and service charge outflows consequences on the basis of examined events in transportation with great veracity. By complex problems the situation is quite different. The frequencies of large accidents are very low but the consequences for the environment may be large. Both are encumbered by large level of uncertainty. That is why the question is rising. To what degree, it is in these cases correct to make decision based on risk assessment.
