Newsvendor bounds and heuristics for serial supply chains with regular and expedited shipping

We study an infinite‐horizon, N‐stage, serial production/inventory system with two transportation modes between stages: regular shipping and expedited shipping. The optimal inventory policy for this system is a top–down echelon base‐stock policy, which can be computed through minimizing 2N nested convex functions recursively (Lawson and Porteus, Oper Res 48 (2000), 878–893). In this article, we first present some structural properties and comparative statics for the parameters of the optimal inventory policies, we then derive simple, newsvendor‐type lower and upper bounds for the optimal control parameters. These results are used to develop near optimal heuristic solutions for the echelon base‐stock policies. Numerical studies show that the heuristic performs well. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

战车火控系统软件可靠性的仿真测试平台

以平均无故障时间间隔(MTBF)和任务成功率为主指标,以某型坦克火控系统为载体,提出了战车非制导武器火控系统软件可靠性仿真测试平台的方案,并对其软件可靠性的仿真测试与验证技术进行了讨论.     

提高某型鱼雷推进电机输出功率的途径

本文根据某型鱼雷推进电机的结构性能参数,从可靠换向、提高转速、轴的机械强度、容许温升、冷却介质等方面阐述了进一步提高鱼雷推进电机输出功率的途径。其实现是可能的。     

纳米结构炭材料的储放氢性能研究

主要对多种纳米结构炭材料（超级活性炭、多壁碳纳米管,纳米碳纤堆,纳米石墨纤堆、纳米石墨球等）在常温、10-13MPa的氢气压力下的储放氢量进行了测定（其中包括经过一系列物化处理的样品）,井对其结构和比表面积分别采用SEM、TEM、HRTEM、ASAP2010吸附测试仪（BET）进行了分析．实验结果表明：经过处理的纳米碳样品的储放氢量有所提高,但没有一种样品在温和的实验每件下的储放氢量超过1．0wt％,离DOE目标（6．5wt%）相距甚远。     

钛在各种介质中的电化学行为的研究

用动电位扫描法研究了钛材在含有不同氯离子浓度溶液中和含有ＰＯ３－４离子的氯离子溶液中的电化学行为．利用线性极化法,测得钛在上述介质中的腐蚀速率．实验结果表明,钛在上述介质中具有非常好的耐蚀性能．     

贴合面及其判断

本文给出了单自由度情况下,自动机基础构件和工作构件运动支承反力的形式及其求法,以根据运动支承反力,判断构件的贴合面,并给出了贴合面换向后自动机运动方程中各影响系数的求解方法。     

The effect of a temporary product distribution channel on supply chain performance

We analyze a supply chain of a manufacturer and two retailers, a permanent retailer who always stocks the manufacturer's product and an intermittent deal‐of‐the day retailer who sells the manufacturer's product online for a short time. We find that without a deal‐of‐the‐day (DOTD) retailer, it is suboptimal for the manufacturer to offer a quantity discount while it is optimal for the retailer to offer periodic price discounts to consumers. With the addition of a DOTD retailer, it is likely to be optimal for the manufacturer to offer a quantity discount. We show that even without market expansion, i.e., no exclusive DOTD retailer consumers, opening the intermittent channel can leave the permanent retailer no worse‐off while increasing the manufacturer's profit. We identify the regular and discounted wholesale prices and the threshold quantity at which the manufacturer should give the discount. We also identify the optimal retail prices. We find that opening the intermittent channel increases the profit of the manufacturer, is likely to decrease the average retail price and to increase sales, and may increase the permanent retailer's profit. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 505–528, 2016     

坦克红外隐形涂料的设计

简要阐述了坦克红外隐形的重要性,并从涂料的红外发射率、太阳能吸收率、涂层的表面结构以及涂料的组分选择等方面提出了坦克红外隐形涂料的设计原则。     

束流位置探测器的一种标定方法及误差分析

加速器运行时,须通过分析处理束流位置探测器拾取的信号,监测束流相对于管道中心的位置．文中介绍了一种对四电极型束流探测器的标定方法,并对误差进行了分析．     

Exploiting symmetry in the reliability analysis of coherent systems

Components in a complex system are usually not structurally identical. However, in many cases we may find components that are structurally symmetric, and one should make use of this additional information to simplify reliability analysis. The main purpose of this article is to define and study one such class of systems, namely, those having symmetric components, and to derive some reliability-related properties. © 1996 John Wiley & Sons, Inc.