Suboptimal decision rule for attacking targets of opportunity

A player having only a definite number of weapons is hunting targets. His total hunting time is also limited. Targets of opportunity with various values arrive at random, and as soon as a target arrives the player observes the target value and decides whether or not to shoot it down. The issue is what the decision rule is which guarantees him a maximum expected gain during the hunting time. Poisson arrival of the targets, uniform distribution of the target value, and the shoot-look-shoot scheme qre assumed. A decision rule is derived which is not optimal but has a very simple form and gives almost as good value as the optimal decision rule does.     

电磁脉冲武器对抗来袭目标可行性研究

针对电磁脉冲武器独特的毁伤机理,计算了杀伤覆盖区域和辐射到目标处的功率密度等作战能力指标,并以反舰导弹为例分析了强电磁脉冲的耦合途径,通过评估前后门耦合的电磁能量,在理论上论证了用电磁脉冲武器对抗来袭目标的可行性.     

多次命中舰艇动力系统生命力评估

以某假想船动力系统为例,建立了多种武器攻击多次命中,多种损伤因素综合作用情况下,基于计算机随机模拟舰艇动力系统生命力评估模型,并验证了其合理性。运用该模型能找出舰艇动力系统的设计薄弱环节,提出改进措施,并可以对改进效果进行分析,这对提高舰艇动力系统的生命力将有重要的意义,也适用于其他系统的生命力评估。     

Approximate decision rules for continuous review inventory systems

Constrained multi-item inventory models have long presented signifcant computational problems. This article presents a general algorithm to obtain simultaneous solutions for order quantities and safety stocks for each line item in an inventory, while satisfying constraints on average inventory investment and reordering workload. Computational experience is presented that demonstrates the algorithm's efficiency in handling large-scale applications. Decision rules for several customer service objectives are developed, with a discussion of the characteristics of the inventory systems in which each objective would be most appropriate. The decision rules are approximations, based on the assumptions commonly used in practice.     

浅析《孙子兵法》中的战机思想

《孙子兵法》中蕴含着丰富而深刻的战机思想。不战全胜的“胜机”思想、立足不败的“待机”思想、变中求胜的“创机”思想、兵贵神速的“夺机”思想和因情用势的“握机”思想等内容,是《孙子兵法》战机思想的核心与精华。     

Combined proportional navigation law for interception of high-speed targets

A new proportional navigation (PN) guidance law, called combined proportional navigation (CPN), is proposed. The guidance law is designed to intercept high-speed targets, which is a common case for ballistic targets. The range of target-to-interceptor speed ratio during target interception is derived when guidance laws are applied in high-speed targets interception, and the effectiveness of negative navigation ratio in the PN-based guidance law is proven analytically in some lemmas. Based on the lemmas, the lateral acceleration command of CPN is defined, and the solution to the appearance of singularity in time-varying navigation ratio is given. The simulation results show that CPN can determine head-on engagement (as PN) or tail-chase engagement (as RPN) through initial path angle compared with PN and retro proportional navigation (RPN), and can adjust the value of navigation ratio for head-on engagement or tail-chase engagement. Therefore, the capture region of CPN is larger than that of other guidance laws using PN-based methods.     

微波超视距条件下舰船目标RCS分层计算方法

针对微波超视距条件下海面舰船目标的散射特性,提出了一种舰船目标雷达散射截面(RCS)的分层计算方法.首先,研究并给出了随机摆动状态下舰船目标各局部散射体的非相干叠加条件;在此基础上,提出了微波超视距条件下舰船目标RCS的计算流程,针对目标的几何建模、模型划分、遮挡面判定、平均RCS计算等进行了详细阐述;最后,以某型舰船...     

水面舰艇对鱼雷防御决策仿真分析

如何对来袭鱼雷进行防御成为水面舰艇对潜防御作战的重中之重.根据世界主要海军国家普遍装备的火箭助飞声诱饵的使用原理、基本战技性能,结合线导+声自导鱼雷的作战过程,仔细分析了水面舰艇对抗鱼雷的作战态势,通过大量的仿真计算得出火箭助飞声诱饵的最佳使用方式以及舰艇的机动方法.     

应急物资保障计划辅助决策模型

提出了一个制定应急物资保障计划的流程,构建了制定应急物资保障计划的数学模型,并应用运筹学的方法对其进行了优化.该模型为制定应急物资保障计划提供了有效的途径.     

炮兵作战决策方案优选的方法

炮兵作战方案的选择,是炮兵作战指挥决策的关键环节,其合理与否,直接关系到炮兵作战效能的发挥和作战的成败.根据炮兵作战的实际,阐述了炮兵作战方案优选的依据,给出了运用层次分析法确定影响作战方案选择的各因素权重的方法步骤,在对优选依据的建模要素进行分析的基础上,构建了每个要素的效用函数计算模型,并给出了评估方案的计算方法,提供了模型应用的一般步骤.     

指定目标不延误条件下的拦截决策算法

从现有的拦截排序准则出发,根据实际作战中进袭目标的特点,应用现代排序理论,分别建立了动态目标拦截排序模型和总损失最小化模型,给出相应的求解算法。最后实例计算得出模型既体现了现有的拦截准则,又对现有的准则进行了推广。     

遗传算法在装备调拨辅助决策中的应用

利用遗传算法求解装备调拨中的路径优化问题和运输装载问题,并利用MATLAB进行了实例仿真,对装备调拨的辅助决策具有积极的意义。     

水面舰艇空中目标火力分配模型研究

根据水面舰艇对空防御的战术需要,系统分析水面舰艇照射器的配置模式,提出了基于改进的分治算法的空中目标火力分配方法,仿真验证结果表明了该方法对提高对空防御软件的可靠性和实时性具有一定的借鉴意义。     

Distribution of number of point targets killed and higher moments of coverage of area targets

The coverage C of area targets by salvos of weapons generally varies randomly, because of random target location and weapon impact point fluctuations. A third source of variation appears when, instead of an area target, a multiple-element target is considered, consisting of m point targets distributed randomly and independently of one another around the target center. A multiple-integral expression is derived for the probability p_k of killing exactly k target elements. It is shown that p_k is a linear function of the higher moments, of the order k to m, of the area coverage C. More explicit expressions are derived for the case of two weapons and for circular-symmetric functions. Similar to well-known results for the expectation and variance of coverage of area targets, these expressions can be evaluated by numerical quadrature. Furthermore, the coverage problem in which all underlying functions are Gaussian can be completely solved in closed form. For such a problem, with two weapons, numerical results are presented. They show that the distribution of k can be approximated by a binomial distribution only if the target center and weapon impact point fluctuations are small.     

Robustness of preallocated preferential defense with assumed attack size and perfect attacking and defending weapons

The problem is to protect a set of t targets by n perfect interceptors against an attack by m perfect weapons. If the defender solves for an optimal preallocated preferential defense and associated game value assuming m₁ attackers, and the attacker knows the assumption of the defender and utilizes m₂ attackers, he may be able to achieve significantly more damage than had the defender assumed that there would be m₂ attackers. The article treats the robustness of preallocated preferential defense to assumptions about the size of the attack and presents results of an alternative approach.     

基于效果的常规导弹打击目标选择决策方法研究

根据信息化条件下常规导弹参与基于效果作战时打击目标选择的需要,提出了基于效果的目标价值和目标之间相关性评价指标;运用不确定决策理论,对二者进行了量化,建立起目标网络模型;运用图搜索论的相关知识进行了目标优选,并给出了计算实例.研究结果可提高信息化条件下常规导弹部队火力运用决策的准确性和科学性.     

旋转单元电场矢量法的真解判定方法

旋转矢量法可被用来进行有源相控阵列的通道校准。每轮测试后在计算相应通道的幅相时会出现伪解。通过调整固定场矢量的幅度,进行两轮测试,判定两轮测试中绝对解不变的那组解为真解。其辨别方法,在有效判定真解的同时,也降低了计算量与测试量。另外,由于两轮测试时只需测量幅度信息,降低了测试设备复杂度。数值仿真结果证明了此方法的有效性。