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面向事件活动流的舰艇作战任务效能评估模型 被引量:2
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作者 韦正现 宋敏 +3 位作者 印桂生 张哲 王红滨 张万松 《系统仿真学报》 CAS CSCD 北大核心 2012年第7期1438-1442,共5页
考虑作战过程性因素对作战效能的影响,将作战任务表示为作用在作战资源上的活动、状态、事件及其关系组成的事件活动流模型。在此基础上,提出了基于信息熵、面向事件活动流的作战任务效能评估模型,针对评估模型中的权重评价,给出了基于... 考虑作战过程性因素对作战效能的影响,将作战任务表示为作用在作战资源上的活动、状态、事件及其关系组成的事件活动流模型。在此基础上,提出了基于信息熵、面向事件活动流的作战任务效能评估模型,针对评估模型中的权重评价,给出了基于微粒群的权重向量优化算法,从而通过对作战任务的事件活动流模型进行效能评估,实现对作战任务效能的评估。最后给出了作战任务效能评估的实例。 展开更多
关键词 作战任务 效能评估 事件活动流 信息熵
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基于ANP的直升机单机森林灭火训练效能评估 被引量:6
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作者 陈杰 刘虎 +2 位作者 孙雪 王宁 戴鑫 《北京航空航天大学学报》 EI CAS CSCD 北大核心 2017年第4期782-789,共8页
现有的直升机单机森林灭火训练效能评估方法仅针对取水灭火过程,忽视了其他任务环节对训练效能的贡献,并假设指标间相互独立,因此导致评估指标体系不全面、指标权重分配不合理,评估结果的可靠性低。利用离散事件系统建模理论建立的事件... 现有的直升机单机森林灭火训练效能评估方法仅针对取水灭火过程,忽视了其他任务环节对训练效能的贡献,并假设指标间相互独立,因此导致评估指标体系不全面、指标权重分配不合理,评估结果的可靠性低。利用离散事件系统建模理论建立的事件活动流将直升机单机森林灭火训练任务分解成若干相关活动,活动映射法对各活动效能要素进行分析并转化为效能评估指标,最终构建出全面的两维度效能评估指标体系;网络分析法(ANP)的使用考虑了评估指标间具有的依赖和相关关系,对指标权重进行重新合理分配,评估方法更符合问题的实际情况,评估结果更加可信。基于超级决策(SD)软件的案例分析表明,所提出的效能评估方法具有工程应用的可行性和参考价值。 展开更多
关键词 直升机森林灭火训练 效能评估 事件活动流 活动映射 网络分析法(ANP)
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Spatial-Temporal Variations of Dominant Drought/Flood Modes and the Associated Atmospheric Circulation and Ocean Events in Rainy Season over the East of China 被引量:4
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作者 HUANG Shaoni HUANG Fei 《Journal of Ocean University of China》 SCIE CAS 2012年第2期137-146,共10页
By using Season-reliant Empirical Orthogonal Function (S-EOF) analysis, three dominant modes of the spatial-temporal evolution of the drought/flood patterns in the rainy season over the east of China are revealed for ... By using Season-reliant Empirical Orthogonal Function (S-EOF) analysis, three dominant modes of the spatial-temporal evolution of the drought/flood patterns in the rainy season over the east of China are revealed for the period of 1960-2004. The first two leading modes occur during the turnabout phase of El Nino-Southern Oscillation (ENSO) decaying year, but the drought/flood patterns in the rainy season over the east of China are different due to the role of the Indian Ocean (IO). The first leading mode appears closely correlated with the ENSO events. In the decaying year of El Nino, the associated western North Pacific (WNP) anticyclone located over the Philippine Sea persists from the previous winter to the next early summer, transports warm and moist air toward the southern Yangtze River in China, and leads to wet conditions over this entire region. Therefore, the precipitation anomaly in summer exhibits a 'Southern Flood and Northern Drought' pattern over East China. On the other hand, the basin-wide Indian Ocean sea surface temperature anomaly (SSTA) plays a crucial role in prolonging the impact of ENSO on the second mode during the ENSO decaying summer. The Indian Ocean basin mode (IOBM) warming persists through summer and unleashes its influence, which forces a Matsuno-Gill pattern in the upper troposphere. Over the subtropical western North Pacific, an anomalous anticyclone forms in the lower troposphere. The southerlies on the northwest flank of this anticyclone increase the moisture transport onto central China, leading to abundant rainfall over the middle and lower reaches of the Yangtze River and Huaihe River valleys. The anomalous anticyclone causes dry conditions over South China and the South China Sea (SCS). The precipitation anomaly in summer exhibits a 'Northern Flood and Southern Drought' pattern over East China. Therefore, besides the ENSO event the IOBM is an important factor to influence the drought/flood patterns in the rainy season over the east of China. The third mode is positively correlated with the tropical SSTA in the Indian Ocean from the spring of preceding year(-1) to the winter of following year(+1), but not related to the ENSO events. The positive SSTA in the South China Sea and the Philippine Sea persists from spring to autumn, leading to weak north-south and land-sea thermal contrasts, which may weaken the intensity of the East Asia summer monsoon. The weakened rainfall over the northern Indian monsoon region may link to the third spatial mode through the 'Silk Road' teleconnection or a part of circumglobal teleconnection (CGT). The physical mechanisms that reveal these linkages remain elusive and invite further investigation. 展开更多
关键词 ENSO IOBM S-EOF drought/flood pattems
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