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基于FRAM-GM法的直升机事故致因研究 被引量:2
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作者 杨晓强 贺非 +1 位作者 张智华 贺强 《中国民航飞行学院学报》 2024年第3期10-15,共6页
为了定量分析直升机事故的主要致因,本文以美国某起直升机事故为例,使用灰色理论(Grey Model,GM)对功能共振分析法(Functional Resonance Analysis Method,FRAM)进行改进,建立FRAM-GM模型。剖析了该架直升机从维修到坠毁的整个过程,找... 为了定量分析直升机事故的主要致因,本文以美国某起直升机事故为例,使用灰色理论(Grey Model,GM)对功能共振分析法(Functional Resonance Analysis Method,FRAM)进行改进,建立FRAM-GM模型。剖析了该架直升机从维修到坠毁的整个过程,找出引发该事故的重要失效功能连接路径并提出对应屏障措施。理论层面上,经过后验差检验,后验差比值c<0.35,小误差概率P>0.95,预测精准可靠;直观层面上,使用Matlab研究了预测值和专家评分之间的相关关系,结果表明预测值与专家评分之间有强相关性,验证了该模型在直升机事故原因分析中具有可行性,为通航领域事故分析提供一定理论依据。 展开更多
关键词 事故分析 功能共振分析法 灰色理论
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Age-Structure and Dynamic of Dominant Population of Castanopsis carlesii Community in Dujiangyan City, Sichuan, China 被引量:1
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作者 CAIXiao-hu ZHONGXiang-hao +2 位作者 WANGJin-xi hefei LIUXing-liang 《Wuhan University Journal of Natural Sciences》 EI CAS 2005年第4期694-700,共7页
It analyses the Castanopsis carlesii, Camellia oleifera and Symplocos launnapopulations' status and role in the Castanopsis carlesii community basing on the study on thedominant population size structure, survival... It analyses the Castanopsis carlesii, Camellia oleifera and Symplocos launnapopulations' status and role in the Castanopsis carlesii community basing on the study on thedominant population size structure, survival curve and dynamic. It reveals the Castanopsis carlesipopulation acts as a main role in the community which maintains the stabilization and renovation ofthe community. The populations of Camellia oleifera and Symplocos laurina act as a secondaryposition. The development and succession dynamics of dominant populations is also discussed. Themanagement method is preliminary drawn out which offers a theoretical basis for the evergreenbroad-leaved forest restoration and reconstruction in the lower hilly of the west edge of theSichuan basin. 展开更多
关键词 dominant population bio-diversity sustainable management
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Exploring and Innovating Practical Education to Serve Local and Regional Economic Development
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作者 hefei XIEYinghong ZHAOHaosen 《外文科技期刊数据库(文摘版)教育科学》 2022年第2期156-160,共5页
Centering on the overall requirements of the development of education in China during the 14th Five-Year Plan period, the theme is of deepening the comprehensive reform in the field of education and promoting the high... Centering on the overall requirements of the development of education in China during the 14th Five-Year Plan period, the theme is of deepening the comprehensive reform in the field of education and promoting the high-quality development of private education, paying attention to the overall, strategic and forward-looking nature of education methods, and promoting the innovation of educational theory, system, method and technical technology on the basis of practice.In this paper, it explores how to innovate undergraduate education in private universities to serve the local regional economic development, make undergraduate education in private universities adapt to meet the needs of economic development, and puts forward corresponding practical education methods and suggestions. 展开更多
关键词 local and regional economy practical education private universities
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