基于3DMAX的飞机命中面积计算方法

在对飞机命中面积(投影面积)计算原理剖析的基础上,基于3DMAX技术、数据拟合技术,提出了一种精确计算飞机命中面积的模型和方法.该方法有效地解决了现有方法计算精度不高的难题,利用已有的商用3DMAX飞机图形库,可完成任意投影平面的命中面积计算.通过对计算结果拟合处理,可建立任意θ、q的拟合公式.最后,给出了投影面积的计算实例,并对方法的准确性进行了检验.此方法在其他领域的毁伤概率计算中也有广泛的应用价值.     

基于时间融合的雷达辐射源自动识别方法

雷达辐射源识别是雷达对抗信号处理中关键环节,也是电子目标识别的重要前提.介绍了Dempster组合规则和加权M-距离法、灰关联分析法等时间融合的雷达辐射源自动识别方法,提出了基于证据理论的单传感器时间融合算法,研究了单传感器在不同时间测量周期的证据综合过程,并给出仿真试验结果.随着噪声的增大,传感器单次时间融合的正确识别率下降很快,而采用基于D-S证据理论的单传感器时间融合方法却有较高的正确识别率,该算法大大降低了错误识别率.因此提出的算法是可行的.     

全电战斗车辆发展概况及关键技术

介绍了目前世界上全电战斗车辆发展的现状和趋势.从新时期军事战略方针及陆军转型的要求等方面,对在我国开展全电战斗车辆研究进行了需求分析.以美军未来战斗系统地面平台为重点,总结和分析了国外相关研究成果.以电传动技术为重点,阐述了全电战斗车辆中的四大关键技术.从发展思路、具体措施等方面,对我国全电战斗车辆的发展提供参考性建议.     

基于DEM的机载C3I指控系统效能评估

随着科学技术突飞猛进的发展、武器更新换代的速度加快,系统效能评估的方法不断被提出和采用.提出了一种以系统空间与使命的匹配程度为目标的动态评估模型的评估思想,该方法在一定程度上能弥补由于使命属性选择不够合理而导致对评估产生的差异.其评估结果表明了机载C3I指控系统试飞达到了预期的目标,各指标都符合设计要求.     

Optimal timing of switches between product sales for sports and entertainment tickets

Like airlines and hotels, sports teams and entertainment venues can benefit from revenue management efforts for their ticket sales. Teams and entertainment venues usually offer bundles of tickets early in their selling horizon and put single‐event tickets on sale at a later date; these organizations must determine the best time to offer individual tickets because both types of ticket sales consume the same fixed inventory. We model the optimal a priori timing decision for a seller with a fixed number of identical tickets to switch from selling the tickets as fixed bundles to individual tickets to maximize the revenue realized before the start of the performance season. We assume that bundle and single‐ticket customers each arrive according to independent, nonhomogeneous Markovian death processes with a linear death rate that can vary over time and that the benefit from selling a ticket in a package is higher than from selling the ticket individually. We characterize the circumstances in which it is optimal for the seller to practice mixed bundling and when the seller should only sell bundles or individual tickets, and we establish comparative statics for the optimal timing decision for the special case of constant customer arrival rates. We extend our analytical results to find the optimal time for offering two groups of tickets with high and low demand. Finally, we apply the timing model to a data set obtained from the sports industry. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

数字交流全电炮控系统研究

通过对比分析国内外坦克炮控系统技术,提出炮控系统技术发展方向,并提出数字交流全电炮控技术控制方案,即一种基于以数字信号处理器（ＤＳＰ）为主控芯片的永磁同步电机双环控制系统,控制方法采用正弦波脉冲宽度调制（ＳＰＷＭ）的控制方案。文中还就一些关键技术,如双模双环控制技术、变参数寻优控制方法、非线性反馈和非线性给定等进行了研究分析。     

基于神经网络的内燃机燃烧过程的辨识

发动机燃烧过程的数值计算精度是计算有害排放物和发动机结构优化的基础。跳出基于零维模型、准维模型和多维模型的数值计算方法,基于利用神经网络对燃烧过程进行辨识,并给出了仿真结果。     

The effects of customer rebates and retailer incentives on a manufacturer's profits and sales

In some industries such as automotive, production costs are largely fixed and therefore maximizing revenue is the main objective. Manufacturers use promotions directed to the end customers and/or retailers in their distribution channels to increase sales and market share. We study a game theoretical model to examine the impact of “retailer incentive” and “customer rebate” promotions on the manufacturer's pricing and the retailer's ordering/sales decisions. The main tradeoff is that customer rebates are given to every customer, while the use of retailer incentives is controlled by the retailer. We consider several models with different demand characteristics and information asymmetry between the manufacturer and a price discriminating retailer, and we determine which promotion would benefit the manufacturer under which market conditions. When demand is deterministic, we find that retailer incentives increase the manufacturer's profits (and sales) while customer rebates do not unless they lead to market expansion. When the uncertainty in demand (“market potential”) is high, a customer rebate can be more profitable than the retailer incentive for the manufacturer. With numerical examples, we provide additional insights on the profit gains by the right choice of promotion.© 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

某型导弹装备使用保障能力评估

导弹装备是一种高可靠性,单一使用的冷储备系统,其先进的战术技术性能必须在有效协调使用保障的基础上才能充分发挥出来。在对某型导弹装备使用保障工作分析的基础上,提出了基于该导弹装备品质的使用保障能力评估指标体系,运用模糊理论建立了多级模糊层次综合评判模型,给出了导弹装备使用保障能力的量化评估方法,并进行了实例计算,结果可为该装备使用保障工作的进一步优化提供参考和依据。