多无人机协同任务分配方法

任务分配是多UCAV协同控制的核心和有效保证,是一类复杂的多目标优化问题。针对一种扩展的混合整数线性规划(MILP)任务分配模型,通过对模型特点的分析,提出一种基于相似度的遗传退火算法解决该问题并进行仿真实验,仿真结果表明该算法具有较强的收敛性和较好的多样性,验证了改进算法解决该问题模型的有效性。     

Military Spending and Economic Growth: The Case of Iran

Over the last decade, the Iranian Government budget on military has been higher than the average of the world. The current increasing international sanctions aim to reduce the military capabilities and capacities of the Iranian Government. We analyze the response of the Iranian economy to shocks in its military budget from 1959 to 2007, using impulse response functions and variance decomposition analysis. The Granger causality results show that there is unidirectional causality from the military spending growth rate to the economic growth rate. The response of income growth to increasing shocks in the military budget is positive and statistically significant.     

The political economy of drones

This paper provides a political economy analysis of the evolution of unmanned aerial vehicles (UAV), or ‘drones’ in the USA. Focus is placed on the interplay between the polity and private economic influences, and their impact on the trajectory of political, economic, and military outcomes. We identify the initial formation of the drone industry, trace how the initial relationships between the military and the private sector expanded over time, and discuss present relationships. Understanding the historical evolution of UAV technology, as well as the major players in the industry today, is important for ongoing policy debates regarding the use of drones both domestically and internationally.     

基于网关的LVC互操作研究

仿真体系结构解决了各自领域内仿真资源的互操作问题,而体系结构间的互操作是解决多种仿真资源互操作的有效方法.由于通信协议、中间件和对象模型的不同,体系结构间不能直接进行信息交互.对象模型间的相同点是异构仿真系统间互操作的基础.建立异构系统对象模型与通用数据交换模型的映射关系,通过模型转换实现各异构系统间的数据交互,最后通过"点对点"和通用网关间的时延比较,总结了通用网关的性能特点.     

TERRORISM: FACTS FROM FIGURES 1

If international terrorism is on a rising trend, an important source of confirmation or refutation of this is time‐series data on terrorist activity. Using chiefly data collected by the RAND/MIPT consortium we show using basic statistical analysis that in the period 1968–2005 the yearly number of all international terrorist incidents shows no trend over time, but fluctuates year on year in a random manner. On the other hand some indicators do show a definite trend over time, principally the steady rise in the number of incidents that are death‐dealing in nature. A further conclusion is drawn, showing that the proportion of these incidents leading to deaths above a given level is virtually fixed.     

Counterterrorism And Its Impact On Terror Support And Recruitment: Accounting For Backlash

This article presents a dynamic model in which counterterrorism policies have the potential to generate positive public support for terrorism via a backlash that may fuel terror recruitment. For an optimizing government aiming at maximizing security, this phenomenon produces a natural bound on proactive counterterror policy that is related to the dynamic path of conflict. Moreover, terror is a persistent phenomenon that requires patience on the part of the target government for optimal counterterror policies to be realized. Finally, the potential for backlash yields insights into the need for target governments to fight an information war to change public opinion regarding its own policies and the ultimate effect of terror attacks.     

基于复杂网络理论的作战系统结构拓扑模型研究

基于复杂网络理论,分析了信息化作战系统网络结构,构建了传统作战系统和信息化作战系统拓扑模型的生成算法,并通过对传统作战系统和信息化作战系统结构拓扑模型度量性质的比较,说明了信息化战争下的作战系统结构特点,为进一步研究网络化战争提供了良好的模型基础．     

随机滤波模型在变速箱剩余寿命预测中的应用研究

摘要：基于变速箱加速寿命实验的振动信号,提取信号的多种特征参量．通过分析各特征参量的敏感性和稳定性,选择幅域裕度指标、峰值指标、波形指标和RMS（RootMeanSquare）作为特征参量,建立一种基于随机滤波的变速箱剩余寿命预测模型,给出剩余寿命后验概率密度的递推公式,设计了极大似然估计方法求解模型参数,并经实例验证模型的有效性和实用性．     

一类具有免疫时滞和病毒颗粒的HIV模型的动力学性态分析

考虑感染细胞的治愈和未感染细胞吸收作用的影响,研究一类具有免疫时滞和病毒颗粒的HIV模型,通过分析特征方程研究平衡点的局部稳定性,利用规范型理论和中心流行定理得到确定Hopl分支方向和分支周期解稳定性的计算公式,并通过构造Lyapunov泛函,讨论未感染平衡点的全局稳定性．     

损伤本构模型在边坡工程损伤破坏研究中的应用

从材料破坏机理与规律出发研究结构性土体工程的渐进破坏过程,是实际工程研究的重要方向。针对结构性土的变形特点和传统本构模型解决结构性土体工程渐进破坏过程的不足,采用作者以前提出的结构性土损伤本构模型对边坡工程算例的渐进破坏过程进行模拟分析。算例计算结果分析表明：边坡在破坏过程中会形成一个贯通剪切带,剪切带土体完全损伤;剪切带上方土体损伤相对较小,且有距离剪切带越远损伤越小的趋势;剪切带下方土体损伤也较小,主要因为开挖对其影响很小且处于稳定的坡体内。研究证明,运用结构性土损伤本构模型能较好地解决实际工程损伤破坏问题。