多鱼雷攻击多目标的可攻性判据及占位参数优化

本文建立了一套系统解决单艇用多鱼雷攻击多目标的可攻击判据和求解对应优化占位参数的方法。本文的研究中采用了独特的分析坐标系,这样在解决和建立可攻击判据的问题上,不仅避免了繁杂的数值计算,还给出了完备的解析解形式及系统化的概念。所得结论对发展现代潜艇鱼雷攻击战术和实现作战决策科学化具有一定的学术价值和实用意义。     

军用飞机改进改型研制费用的参数估算法

首先分析并建立了军用飞机改进改型研制的费用分解结构,阐明了与新研飞机在各分项费用上的差别。基于当量工程的概念提出了用减缩系数来估算改进改型研制的费用修正和各分项费用的减缩系数的估计方法,结合现有成熟的参数估算模型建立了相应的改进改型研制的费用估算模型。最后,以某型飞机的改型研制费用为例进行了实例分析,结果表明方法与模型具有较好的有效性和实用性。     

片体干扰对三体船附加质量和附加惯性矩的影响研究

基于三维Rankine源方法,进行三体船附加质量和附加惯性矩计算,分析了片体干扰对三体船附加质量和附加惯性矩的影响,为三体船操纵性预报奠定基础.通过对圆球、椭球附加质量和附加惯性矩的计算,以及对三体船附加质量和附加惯性矩定性规律的分析,说明了文中方法的可靠性.研究表明,片体干扰对三体船附加质量和附加惯性矩有一定影响,但并不十分明显,且这种影响随着间距的增大很快衰减.     

The causal nexus between military spending and unemployment in the G7: a bootstrap panel causality test

We revisit the causal relationship between military spending and unemployment in the G7 countries applying a bootstrap panel causality analysis that accounts for both cross-sectional dependence and for heterogeneity across countries. Using per capita real GDP as a controlled variable, we found a unidirectional causality running from military spending to unemployment for Canada, Japan, and the US, one-way causality running from unemployment to military spending for France and Germany, and bidirectional causality for Italy and the UK. The empirical evidence does not seem to provide consistent results regarding the causal relationship between military spending and unemployment in G7 countries.     

基于事件分解的电磁脉冲前门耦合效能评估方法

电磁脉冲弹是一种利用辐射高功率电磁脉冲干扰/毁伤目标电子系统的新概念武器。为计算电磁脉冲通过前门耦合毁伤目标的效能,提出一种基于事件分解的效能评估方法,按时间序列将前门耦合-毁伤过程分为弹体爆炸辐射功率、电磁能量传输衰减、目标系统耦合3个子事件,分别用不同算法计算不同子事件的发生效能。用这种方法对美国MK.84导弹搭载的电磁脉冲弹进行评估,得到一定参考价值的效能评估值。     

Dynamic regulation on innovation and adoption of green technology with information asymmetry

This study investigates a regulator's dynamic policy to motivate firms' research on and adoption of green technology. In the proposed model, a firm makes unobservable efforts and can hide the technology's arrival from the regulator to avoid adoption costs. We find that the optimal policy follows a simple structure and induces part-time efforts, rather than the maximal effort reported in previous studies. In particular, the regulator should offer no subsidy before the arrival of a technology report, provide a one-time subsidy contingent upon that report, and always set a termination deadline. At the deadline, the firm is forced to select an external option that is associated with social costs. The optimal report-based subsidy decreases with time. Under the optimal policy, the firm works until an effort deadline, makes no effort thereafter, and reports the technology as soon as it arrives. This study also characterizes the necessary and sufficient conditions under which the optimal policy reduces to one that leads, in terms of throughout time, to effort that is maximal or minimal. Our results indicate that policymakers should implement a policy that compensates firms more in the present and less in the future.     

一种纯方位跟踪中的自适应滤波算法

针对纯方位被动目标跟踪中扩展卡尔曼滤波算法易发散的不足,提出了一种自适应的改进算法。该算法利用极大后验噪声估计器Sage-Husa对虚拟观测噪声进行实时在线估计,动态补偿线性化带来的误差。算法的对比仿真分析结果表明,AEKF较之EKF滤波效果有所改善,增强了稳定性,提高了精度,为水下纯方位被动目标跟踪的实现提供一种新的方法。     

空战中基于威胁评估的任务规划

根据空战作战计划的复杂性、实时性特点,提出了在威胁评估基础上动态进行空战任务规划以实现对战场的有效实时控制.首先建立了融合态势优势和空战效能指数优势的威胁评估模型,然后将感知到的战场态势信息作为威胁评估模型的输入,得到体现战场态势的优势矩阵,最后在此基础上进行攻击目标的分配.以目标分配的结果为根据就可以指导作战单位做出正确实时的决策.     

一种改进的证据权重确定方法

针对Dempster方法在合成高冲突证据时存在的问题,分析了现有改进方法的缺点,提出了一种新的改进方法。该方法首先利用证据之间的相似系数求出各证据的初级权重;然后引入权重折扣因子,将冲突证据的权重按折扣因子折算后并入到其他证据的权重中,得到各证据的综合权重;最后对证据加权平均后再利用D-S组合规则进行组合,通过算例比较表明改进后的方法合成结果更加有效。     

C76、C78、C82、C84和C90的π电子磁化率

采用规范不变分子轨道方法,计算了Ｄ_２—Ｃ_（７６）、Ｃ_（２ｖ）￣－和Ｄ_３—Ｃ_（７８）、Ｃ_２—Ｃ_（８２）、Ｄ_２—和Ｄ_（２ｄ）—Ｃ_（８４）以及Ｃ_２—Ｃ_（９０）的л电子磁化率。其结果表明这些纯碳原子团簇分子具有较大的抗磁磁化率。反映出这些分子具有一定的芳香性及其л电子有较大的共有化运动程度。