Aircraft icing has been proven to be one of the most serious threats to flight safety. During the analysis of flight risk under icing conditions, quantitative assessment and visualization of flight risk are quite esse...Aircraft icing has been proven to be one of the most serious threats to flight safety. During the analysis of flight risk under icing conditions, quantitative assessment and visualization of flight risk are quite essential as they provide safe manipulation strategies in intricate conditions.However, they are rarely studied. Since the icing flight accidents are the result of the coupling of multiple unfavorable factors, in present study, we have proposed a method to quantitatively assess flight risk induced by multi-factor coupling under icing conditions by Monte-Carlo simulation and multivariate extreme value theory. The results demonstrate that the flight risk probability increases with the rise of unfavorable factors. Besides, a flight risk visualization method named flight safety window has been presented to build the flight risk distribution cloud maps in different complex conditions. The cloud maps show that the icing would give rise to atrophy of the safety scope, and the consequence would be even more severe when coupled with other more unfavorable factors. The proposed methods in this study would be useful in flight risk analysis under icing conditions and can enhance the pilot's situational awareness in selecting correct strategies within the safety zone to avoid unsafe manipulation.展开更多
目的了解国内护理期刊风险预测模型的研究领域整体情况,分析研究发展状况及研究热点。方法计算机检索中国知网、维普、万方数据、中国生物医学数据库4个数据库建库至2023年7月31日护理期刊收录的风险预测模型相关研究文献。采用Note Exp...目的了解国内护理期刊风险预测模型的研究领域整体情况,分析研究发展状况及研究热点。方法计算机检索中国知网、维普、万方数据、中国生物医学数据库4个数据库建库至2023年7月31日护理期刊收录的风险预测模型相关研究文献。采用Note Express软件合并去重,采用Cite Space 6.1软件绘制关键词、突现词知识图谱并进行分析。结果共纳入文献534篇,文献来源于25种期刊,其中《护理研究》发文最多,关键词中“危险因素”出现频次最高。研究热点为聚焦于于谵妄、低体温、压力性损伤等不良事件的风险因素识别与管理,研究人群涉及重症监护病房患者及老年人。肠内营养并发症如肠内营养相关性腹泻及静疗置管并发症如导管相关性血流感染的预防及管理是近年来的研究趋势。结论近年来,护理期刊风险预测模型发文量显著增加,未来需要进一步完善研究设计,完善现有的模型验证并修正改进,以期建立科学、精准、高质量的风险预测模型,为患者提供针对性护理。展开更多
基金supported by the National Key Basic Research Program of China (No. 2015CB755802)。
文摘Aircraft icing has been proven to be one of the most serious threats to flight safety. During the analysis of flight risk under icing conditions, quantitative assessment and visualization of flight risk are quite essential as they provide safe manipulation strategies in intricate conditions.However, they are rarely studied. Since the icing flight accidents are the result of the coupling of multiple unfavorable factors, in present study, we have proposed a method to quantitatively assess flight risk induced by multi-factor coupling under icing conditions by Monte-Carlo simulation and multivariate extreme value theory. The results demonstrate that the flight risk probability increases with the rise of unfavorable factors. Besides, a flight risk visualization method named flight safety window has been presented to build the flight risk distribution cloud maps in different complex conditions. The cloud maps show that the icing would give rise to atrophy of the safety scope, and the consequence would be even more severe when coupled with other more unfavorable factors. The proposed methods in this study would be useful in flight risk analysis under icing conditions and can enhance the pilot's situational awareness in selecting correct strategies within the safety zone to avoid unsafe manipulation.
文摘目的了解国内护理期刊风险预测模型的研究领域整体情况,分析研究发展状况及研究热点。方法计算机检索中国知网、维普、万方数据、中国生物医学数据库4个数据库建库至2023年7月31日护理期刊收录的风险预测模型相关研究文献。采用Note Express软件合并去重,采用Cite Space 6.1软件绘制关键词、突现词知识图谱并进行分析。结果共纳入文献534篇,文献来源于25种期刊,其中《护理研究》发文最多,关键词中“危险因素”出现频次最高。研究热点为聚焦于于谵妄、低体温、压力性损伤等不良事件的风险因素识别与管理,研究人群涉及重症监护病房患者及老年人。肠内营养并发症如肠内营养相关性腹泻及静疗置管并发症如导管相关性血流感染的预防及管理是近年来的研究趋势。结论近年来,护理期刊风险预测模型发文量显著增加,未来需要进一步完善研究设计,完善现有的模型验证并修正改进,以期建立科学、精准、高质量的风险预测模型,为患者提供针对性护理。
