基于系统动力学的反恐怖作战模型

在未来作战中,反恐怖作战将成为一种重要的作战样式。以反恐怖作战理论为基本依据,针对反恐怖作战的实效性、非对称性、不可预测性等特点,基于系统动力学,建立反恐怖作战模型,解决了反恐怖作战中作战效能评估、兵力需求预测、兵力分配决策等问题。     

Filibustering from Africa to the Americas: non-state actors and empire

This article looks at dominant definitions of empire, in particular those emphasizing large polities as the sole agents of imperial expansion. By doing so, it draws attention to the overlooked role of filibusters: private, non-state actors who initiate unauthorized military endeavours, either in an attempt to carve out empires for themselves or for their home state. It demonstrates that filibustering is not a practice unique only to the Americas or to the nineteenth century as so much of the literature suggests. Lastly, it scrutinizes the cultural and historical impact of the phenomenon. In terms of the former, it argues that filibustering had an important literary and filmic influence. Regarding the latter, it advocates that it frequently led to further violent intercessions in many of the countries occupied and influenced a particular style of proto-fascistic and charismatic militarism.     

Scheduling deteriorating jobs to minimize makespan

We consider a single-machine problem of scheduling n independent jobs to minimize makespan, in which the processing time of job J_j grows by w_j with each time unit its start is delayed beyond a given common critical date d. This processing time is p_j if J_j starts by d. We show that this problem is NP-hard, give a pseudopolynomial algorithm that runs in time and O(nd) space, and develop a branch-and-bound algorithm that solves instances with up to 100 jobs in a reasonable amount of time. We also introduce the case of bounded deterioration, where the processing time of a job grows no further if the job starts after a common maximum deterioration date D > d. For this case, we give two pseudopolynomial time algorithms: one runs in O(n²d(D − d) time and O(nd(D − d)) space, the other runs in p_j)²) time and p_j) space. © 1998 John Wiley & Sons, Inc. Naval Research Logistics 45: 511–523, 1998     

Robust shortest path planning and semicontractive dynamic programming

In this article, we consider shortest path problems in a directed graph where the transitions between nodes are subject to uncertainty. We use a minimax formulation, where the objective is to guarantee that a special destination state is reached with a minimum cost path under the worst possible instance of the uncertainty. Problems of this type arise, among others, in planning and pursuit‐evasion contexts, and in model predictive control. Our analysis makes use of the recently developed theory of abstract semicontractive dynamic programming models. We investigate questions of existence and uniqueness of solution of the optimality equation, existence of optimal paths, and the validity of various algorithms patterned after the classical methods of value and policy iteration, as well as a Dijkstra‐like algorithm for problems with nonnegative arc lengths.© 2016 Wiley Periodicals, Inc. Naval Research Logistics 66:15–37, 2019     

迫弹引信动态模拟试验的终点效应相似准则

本文从动态模拟试验与靶场验收试验的等效性出发,根据瞬发发火和惯性发火作用机理的不同,分别建立了迫弹引信在碰击靶板过程中着发机构的物理数学模型,从理论上推导了考核引信瞬发发火可靠性和惯性发火可靠性的相似准则,即模拟弹着靶速度与靶场验收试验时实弹着靶速度间的关系。     

航母编队航渡过程中防空哨戒舰阵位确定方法研究

研究了一种航母编队航渡过程中防空哨戒舰的阵位确定方法。通过对航母编队防空区域划分与防空作战过程的分析,总结了航母编队航渡过程中防空哨戒舰阵位确定的原则,建立了防空哨戒舰阵位的数学模型,仿真计算了模型中各个参数对防空哨戒舰前出距离的影响。这些模型可用于确定防空哨戒舰的前出距离和方位,满足航母编队作战使用的需要。     

美军装备维修改革现状与发展

近些年来,美军为有效适应高新武器装备发展需要和军事转型挑战,持续在装备维修领域进行了一系列深度改革。着重从维修思想、维修技术、维修手段和维修体制4个方面系统分析了相关改革现状,阐释了这些改革的动因、内容、成效和发展趋势。研究表明,美军装备维修改革促成了信息化条件下美军装备维修保障的新优势。     

运用动态规划的智能卫星集群星间通信路由算法

通过建立智能卫星集群网络模型,把智能卫星集群星间通信路由问题转换为时延最短路径问题,进而提出一种求解此问题的智能卫星集群星间通信路由算法.该路由算法采用动态规划策略分阶段规划智能卫星集群两个成员之间的星间通信路由,在每个规划阶段,负责发送数据的智能卫星自主调用一种星间通信路由静态规划算法,以求出其在当前时刻的后继卫星来...     

机体/推进一体化飞行器动导数频域计算方法

运用Etkin非定常气动力模型,将谐波平衡法应用于复杂外形动导数辨识。计算结果表明:谐波平衡法和时域方法的动导数辨识结果一致,与实验值吻合,验证了程序的正确性和谐波平衡法的可靠性。采用谐波平衡法对类X-51高超声速机体/推进一体化飞行器WR-A进行动导数辨识,并与时域方法的计算结果比较,考察了该方法在复杂外形下数值模拟非定常流动和动导数辨识的能力。实验结果表明:对于WR-A这种复杂外形飞行器,谐波平衡法也能在保证精度的同时具有较高的计算效率。     

多层局部回归神经网络在激光陀螺捷联惯导系统惯性敏感器误差补偿中的应用

惯导系统误差补偿技术对提高武器装备的性能具有重要的意义 ,而误差补偿的关键在于误差模型的辨识。探讨将多层局部回归神经网络引入到惯性敏感器误差建模中 ,详细介绍了网络结构和对应的自适应动态梯度算法。仿真算例说明 ,多层局部回归神经网络在惯性敏感器输出误差建模时具有一定的优点 :网络收敛速度快、较好的跟踪性能、稳定性好。