排序方式: 共有147条查询结果,搜索用时 296 毫秒
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对战机对抗导弹的措施优化问题进行了研究,将该问题归结为不确定条件下的序贯决策问题,提出了一种基于Markov决策过程(MDP)的导弹对抗措施优化方法。首先,该方法根据作战过程将作战阶段分为不同的状态,将电子对抗措施(ECM)和战术机动作为可供战机选择的行动;然后,通过不同战术行动下状态之间的转移概率来反映行动的不确定性,以雷达搜索状态和导弹命中状态的期望值来表征不同策略下的飞机生存力;最后,通过建立Markov决策模型得到飞机生存力最大时各个状态对应的最佳行动。仿真结果表明:飞机生存力随着时间推移而逐渐降低;不同策略下飞机的生存力不同,基于MDP的策略可以有效提高飞机的生存力;单步优化措施不能提高战机的生存力,必须考虑长期状态转移的影响。 相似文献
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金融危机视角下的大学生就业问题 总被引:4,自引:0,他引:4
徐凯 《沈阳航空工业学院学报》2008,25(6)
金融危机可能引发大规模的就业冲击。美国次贷危机引发的国际社会金融海啸对整个经济增长带来巨大的负面影响。就中国而言,行业性的冲击不可避免,这对就业增长将是非常不利的。大学生就业难已是不争的事实,为此必须落实好高校就业工作,实现大学生充分就业,发挥好这部分人的作用,这也是落实科教兴国战略,全面建设小康社会的客观要求。 相似文献
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To solve the problem of dynamic power resource allocation for cooperative penetration combat,the continuous game theory is introduced and a two-person general-sum continuous-game-based model is put forward with a common payoff function named collaborative detection probability of netted radar countermeasures.Comparing with traditional optimization methods,an obvious advantage of game-based model is an adequate consideration of the opposite potential strategy.This model guarantees a more effective allocation of the both sides′power resource and a higher combat efficiency during a combat.Furthermore,an analysis of the complexity of the proposed model is given and a hierarchical processing method is presented to simplify the calculating process.Simulation results show the validity of the proposed scheme. 相似文献
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朱凯峰 《北华航天工业学院学报》2007,17(2):58-59
高等学校招生就业制度的改革,推进了招生、就业市场的迅速形成,招生与就业之间的矛盾日益呈现,内在原因除了体制问题之外还有诸多的不确定性,做好这两项工作是保持高等教育持续、稳定发展的需要,是我国经济社会发展的需要. 相似文献
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Michel Nicolas 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2009
This study investigated the time-course of stress and recovery states and their relations to social support and personality traits in healthy women during a long-term head-down tilt bed rest. Personality, social support and affective states were assessed in 16 women exposed to simulated microgravity for a 60-day duration involving three stages: a 20-day baseline control period (BDC), a 60-day head-down tilt bed rest (HDT) and a 20-day post-HDT ambulatory recovery period (R+). Participants were divided into two groups: an exercise (Exe, n = 8) and a control group (Ctl, n = 8). All the participants experienced significantly more stress during the HDT period. But exercise did not improve the impaired effects of simulated microgravity. The Exe group perceived more stress and less recovery than the Ctl group during the HDT period. Among the five major personality factors, only Neuroticism was related to both social and affective variables. Neuroticism was positively associated with stress and negatively associated with recovery and social support (S-SSQ). Practical implications in psychological countermeasures for better dealing with the key human factor in spaceflights are discussed. 相似文献
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空间对抗是当今世界空间技术与军事领域研究的重点.论述了空间对抗体系研究中存在的问题,分析了解决这些问题的必要性,讨论了系统仿真技术在空间对抗体系中应用的基本方法,并从建设目标和研究方向两方面,详细介绍了空间体系对抗仿真系统建设的基本思路,重点阐述了仿真系统的构成与特征. 相似文献
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王红彬 《长沙航空职业技术学院学报》2006,6(2):12-14
目前,我国女大学生的职业规划仍然存在诸多问题,分析探讨这些问题存在的原因并提出相应的教育对策,对于帮助女大学生实现职业发展目标及成功就业具有重要的意义。 相似文献
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