目标自动跟踪参数辨识模型的工程化动态辨识

为解决机动目标参数辨识模型工程应用问题,采用扩张状态观测器等先进的非线性滤波算法,从实测的含有观测噪声的目标位置数据的序列中,直接估计出机动目标运动的一阶、二阶、三阶导数,并结合目标运动模型辨识的理论算法,在工程应用上首次实现了机动目标运动模态和运动模型的双重动态辨识,完成了目标模型动态辨识的工程化设计.     

装备精确修理浅析

如何用有限的装备修理力量,在战役全过程中尽可能多地修复战损装备,提高装备参战率,是战役装备修理的任务.提出精确修理以装备动态需求为依据,通过优化装备修理各要素,为战损装备提供"精确"的服务,来实现装备修理的快速高效,并通过建立修理人员效能评估模型,说明精确修理的高效性.     

一座小型建筑空调动态负荷的ANN预测研究

人工神经网络(Artificial Neural Network,简称ANN)是一种崭新非线性建模和预测方法,具有良好的非线性品质和极高的拟合精度。在前人研究的基础上,针对一座小型建筑物建立了其空调动态负荷预测的BP模型。为克服常规BP训练算法的缺陷,提出了一种改进的遗传搜索算法,结果证明是一种高效实用的算法。     

静电放电辐射场的实验研究

对人体 -金属ESD模型和家具ESD模型进行了讨论 ,介绍了其放电电流波形的主要特点及影响它们的主要因素。利用单极子天线和数字存储示波器对静电放电产生的电磁脉冲辐射场进行了实验研究。实验表明 ,ESD的辐射场在距离放电源几米以内是很短的窄脉冲 ,其脉冲持续时间约为几百ns,但其场强很大 ,典型可达几kV/m (在 1 8cm处 ) ,一般在约几百V/m (在 1 5m以内 ) ,共频谱主要分布在几十到几百MHz,频谱上限可以达到几个GHz.     

弹丸动平衡自动测试方法研究

采用 IBM- PC机为主机 ,对弹丸动不平衡量 (m1 ,m2 )及相位角α进行自动测试并做相应的数据处理。设计了弹丸左、右两标定面的平面分离电路、A/D转换电路等。     

基于CORBA的分布式网管的实现

以某师的网管系统为例 ,介绍了基于 CORBA ORB通信总线结构网管软件的设计与实现。并对其中的若干技术问题 ,如网管信息模型的建立、网管软件的安全性及本系统的不足进行了深入讨论     

基于Neumann谱和PM谱的海浪感应磁场能量分布计算

结合前人在海浪功率谱以及海浪产生磁场两方面的研究 ,求出了海浪 磁场系统的传递函数 ,分析了该系统的性质 ,并利用该传递函数和Neumann谱、PM谱计算了磁场功率谱 ;在此基础上 ,根据实际观测我国海区的海浪高度 周期分布 ,求解海浪分布参数 ,模拟实际的海浪过程 ,求出了实际情况下的海浪感应磁场功率谱 ,并分析了其特性 .     

EP/PVB半-互穿聚合物网络的动态力学谱

制备了EP/PVB半 互穿聚合物网络 .动态力学谱结果表明 ,适量的PVB对环氧树脂有较好的增韧作用 ,而环氧树脂对PVB的增硬作用不明显 .     

The dynamic transshipment problem

We investigate the strategy of transshipments in a dynamic deterministic demand environment over a finite planning horizon. This is the first time that transshipments are examined in a dynamic or deterministic setting. We consider a system of two locations which replenish their stock from a single supplier, and where transshipments between the locations are possible. Our model includes fixed (possibly joint) and variable replenishment costs, fixed and variable transshipment costs, as well as holding costs for each location and transshipment costs between locations. The problem is to determine how much to replenish and how much to transship each period; thus this work can be viewed as a synthesis of transshipment problems in a static stochastic setting and multilocation dynamic deterministic lot sizing problems. We provide interesting structural properties of optimal policies which enhance our understanding of the important issues which motivate transshipments and allow us to develop an efficient polynomial time algorithm for obtaining the optimal strategy. By exploring the reasons for using transshipments, we enable practitioners to envision the sources of savings from using this strategy and therefore motivate them to incorporate it into their replenishment strategies. © 2001 John Wiley & Sons, Inc. Naval Research Logistics 48:386–408, 2001     

Dynamic pricing in a trade-in program with replacement and new customers

Trade-in programs have been widely adopted to enhance repeat purchase from replacement customers. Considering that a market consists of replacement and new segments, we study the joint and dynamic decisions on the selling price of new product (hereafter, “selling price”) and the trade-in price involved in the program. By adopting a vertical product differentiation choice model, we investigate two scenarios in this paper. In the base model, the manufacturer has sufficiently large production capacity to fulfill the customer demand. We characterize the structural properties of the joint pricing decisions and compare them with the optimal pricing policy under regular selling. We further propose a semi-dynamic trade-in program, under which the new product is sold at a fixed price and the trade-in price can be adjusted dynamically. Numerical experiments are conducted to evaluate the performance of the dynamic and semi-dynamic trade-in programs. In an extended model, we consider the scenario in which the manufacturer stocks a batch of new products in the beginning of the selling horizon and the inventory cannot be replenished. Following a revenue management framework, we characterize the structural properties with respect to time period and inventory level of new products.