基于对抗模拟的箔条质心干扰决策计算方法

通过分析箔条质心干扰的作战过程,综合考虑了反舰导弹的来袭方向、性能参数、舰艇的物理和运动参数、作战海域的天气情况,建立箔条质心干扰反舰导弹的作战模拟模型,在此基础上提出了箔条质心干扰方案的计算方法.应用实例的过程和结果表明,该方法简易可行,通过真实模拟双方的对抗过程,所得决策方案可信度高,对质心干扰决策具有很好的指导价值.     

基于凸优化理论的三维微分对策制导规律求解

针对三维微分对策制导律(DGL)求解问题,引入凸优化理论,将DGL求解归结到Hamilton系统的求解,设计了DGL求解算法,通过对代价函数梯度特征的凸分析,推导出对策系统鞍点存在的充要条件和求解方法,解决了以往通过对微分对策模型简化求解导致的模型不能客观反映作战过程的问题.     

零彗差自由点条件下的失调光学系统波像差特性分析

基于矢量像差理论,对反射式光学系统的一类特殊失调状态——满足零彗差自由点条件展开研究,分析了该特殊失调下三阶彗差和三阶像散的全视场波像差特性,建立了三阶像散双节点位置的解析计算公式,研究发现该类失调不会引入三阶彗差,并且会导致三阶像散的一个节点位于中心视场附近,揭示了当前传统装调方法中仅采用轴上彗差为零作为系统完善装调的弊端,并基于像差特性分析提出了一种仅根据轴上视场引入定量失调误差前后的像差变化来评估系统完善装调的方法。利用CODE V(Version 10.2)对两反式光学系统进行了仿真分析,结果表明文中建立的模型和方法可定量分析三阶像散双节点的位置及该类失调对系统波像差的影响规律,并验证了所提出系统完善装调方法的有效性。     

杂波环境下机动目标跟踪算法研究

杂波环境下的机动目标跟踪问题具有非线性、非高斯、不完全观测的特点,其难点在于观测值与目标的对应关系及每一时刻的运动模式均呈现高度不确定性。文中将多模型理论和辅助粒子滤波算法相结合,提出了一种新的杂波环境下机动目标跟踪算法——多模型辅助粒子滤波算法(MMAPF)。仿真结果表明,该算法与传统的交互多模型——扩展卡尔曼滤波算法、辅助粒子滤波算法相比,在相同的情况下,具有更高的滤波精度和较好总体性能。     

基于D-S推理的灰关联通信电台识别研究

为了解决通信电台识别问题,在灰关联识别的过程中,引入D-S证据理论,通过对信号的积累和对信任度的重新分配,对识别结果进行了有效的融合,提高了辐射源的正确识别率。仿真结果表明了该方法的可行性和有效性。     

实施大区域防空应重视末端防御

结合大区域防空作战的理论研究,分析未来防空中末端防御在大区域防空体系中的地位和作用。提出末端防御是大区域防空的重要组成部分,是防空体系中实施大区域防空的最后一道防线,是实现歼灭敌空袭兵器与掩护重要目标安全的重要手段。通过分析现代空袭特点,提出实施末端防御对我防空武器装备发展的要求。     

Discrete search allocation game with false contacts

This paper deals with a two‐person zero‐sum game called a search allocation game, where a searcher and a target participate, taking account of false contacts. The searcher distributes his search effort in a search space in order to detect the target. On the other hand, the target moves to avoid the searcher. As a payoff of the game, we take the cumulative amount of search effort weighted by the target distribution, which can be derived as an approximation of the detection probability of the target. The searcher's strategy is a plan of distributing search effort and the target's is a movement represented by a path or transition probability across the search space. In the search, there are false contacts caused by environmental noises, signal processing noises, or real objects resembling true targets. If they happen, the searcher must take some time for their investigation, which interrupts the search for a while. There have been few researches dealing with search games with false contacts. In this paper, we formulate the game into a mathematical programming problem to obtain its equilibrium point. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Inventory control and periodic price discounting campaigns

This paper develops an inventory model that determines replenishment strategies for buyers facing situations in which sellers offer price‐discounting campaigns at random times as a way to drive sales or clear excess inventory. Specifically, the model deals with the inventory of a single item that is maintained to meet a constant demand over time. The item can be purchased at two different prices denoted high and low. We assume that the low price goes into effect at random points in time following an exponential distribution and lasts for a random length of time following another exponential distribution. We highlight a replenishment strategy that will lead to the lowest inventory holding and ordering costs possible. This strategy is to replenish inventory only when current levels are below a certain threshold when the low price is offered and the replenishment is to a higher order‐up‐to level than the one currently in use when inventory depletes to zero and the price is high. Our analysis provides new insight into the behavior of the optimal replenishment strategy in response to changes in the ratio of purchase prices together with changes in the ratio of the duration of a low‐price period to that of a high‐price period. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007.     

毛泽东对抗日战争进程和结局的科学分析与预测——纪念七七卢沟桥事变70周年

今年是七七卢沟桥事变70周年。70年前,在国难当头,民族危亡之时,中国共产党带领全国人民浴血奋战。毛泽东以他伟大的军事家的远见卓识,在延安窑洞的灯光下运筹帷幄,奋笔疾书,谱写了一篇篇闪光的抗战军事著作。在这些著作中,毛泽东深刻地分析、科学地预测了抗日战争的进程和最终的战局。正是这些英明正确的军事理论指引着中国人民夺取了抗日战争的伟大胜利。今天,处在和平发展时期的每一位中国人都应重温历史,勿忘国耻,珍爱和平,开创未来。     

韩礼德的语域理论与大学英语教学

韩礼德的语域理论是系统功能语法的重要理论之一,它强调语言的交际功能和社会意义。文章探讨了如何将语域知识运用于大学英语教学实践,这种尝试不仅能使学生的阅读理解能力得到提高,而且有利于听、说、写、译等综合能力的提高,从而找到一种较好的教学方法,加速学生从语言知识向语言应用能力转化的过程。