Information disclosure with endogenous channel structure

This article investigates the firms' optimal quality information disclosure strategies in a supply chain, wherein the supplier may encroach into the retail channel to sell products directly to end consumers. We consider two disclosure formats, namely, retailer disclosure (R-C) and supplier disclosure (S-C), and examine the optimal disclosure format from each firm's perspective. We show that either firm prefers to delegate the disclosure option to its partner when the supplier cannot encroach. However, the threat of supplier encroachment dramatically alters the firm's preference of disclosure. The supplier may prefer the S-C format to the R-C format when the entry cost is low and the disclosure cost is high to achieve a higher quality information transparency. Meanwhile, the retailer may prefer the R-C format to the S-C format when the entry cost is intermediate to deter the possible encroachment of the supplier. In this sense, the firms' preferences of disclosure format can be aligned due to the threat of supplier encroachment. The consumer surplus is always higher under the S-C format while either disclosure format can lead to a higher social welfare. We also consider an alternative scenario under which the supplier encroaches after the product quality information is disclosed. An interesting observation appears that the supplier may encroach when the product quality is low but foregoes encroachment when the product quality gets higher.     

人机智能融合的陆军智能化作战指挥模型体系

人机智能融合是未来作战指挥变革的关键,智能化作战指挥模型体系是提升陆军作战指挥整体效能的核心。针对人机关系及其智能融合方式,提出了陆军智能化作战指挥模型体系框架HAI2OC,构建了人机并行深度态势感知、人机融合智能指挥决策、人机共生自主控制协调和人机平行跨域作战评估四大模型体系,以供进一步深入研究参考。     

危险球心法求解避雷针保护范围

讨论了一种避雷针保护范围的计算方法,给出了图例和计算公式。利用危险球心法可以对复杂结构建筑物的防雷设计与校核提供一种简便的解题思路和方法。     

星载SAR对舰船高分辨成像研究

研究了星载SAR对舰船高分辨成像的难度和方法。在星载SAR舰船数据获取模型的基础上,着重分析了舰船航行以及船体在特定海情时三维转动对星载SAR成像的影响,研究了星载SAR舰船数据的ISAR成像方法,并给出成像算法流程,仿真结果验证了该方法的有效性。     

一种新的非参数谱估计方法

提出了一种新的非参数谱密度估计方法,它是传统加窗周期谱估计方法的一种修正,并证明了此估计具有渐近无偏性、相合性、渐近正态性.     

Coping with shortages caused by disruptive events in automobile supply chains

Unpredictable disruptive events significantly increase the difficulty of the management of automobile supply chains. In this paper, we propose an automobile production planning problem with component chips substitution in a finite planning horizon. The shortage of one chip can be compensated by another chip of the same type with a higher-end feature at an additional cost. Therefore, the automobile manufacturer can divert the on-hand inventory of chips to product lines that are more profitable in the event of shortages caused by supply chain disruptions. To cope with this, we propose a max-min robust optimization model that captures the uncertain supplies of chips. We show that the robust model has a mixed-integer programming equivalence that can be solved by a commercial IP solver directly. We compare the max-min robust model with the corresponding deterministic and two-stage stochastic models for the same problem through extensive numerical experiments. The computational results show that the max-min robust model outperforms the other two models in terms of the average and worst-case profits.     

基于Hibernate的装备管理系统的设计与实现

分析了对象/关系映射框架Hibernate的体系结构和工作原理,提出了一种基于Hibernate框架的装备管理信息系统的体系结构和设计方案,详细介绍了基于Hibernate框架的数据持久层的设计与实现。     

海空背景下目标红外辐射特征分析

根据海空复杂背景下点目标的红外特征 ,提出了目标红外特征的一般计算方法 .根据不同的气象条件、不同海域背景 ,计算分析了环境对红外辐射两个大气窗口 ,即 3～ 5 μm和 8～ 12 μm双波段大气透过率的影响 ,并给出了相应结论     

现代化的GPS军用M码综述

M码是现代化的GPS军用码,是美国"导航战"的重要内容。从M码信号的设计要求出发,介绍了M码信号的调制原理及其功率谱和自相关特性;然后根据相关损失、均方根带宽、频谱隔离系数和等效矩形带宽等参数对M码、C/A码和P(Y)码性能进行了分析比较;最后总结了M码的几种捕获和跟踪方案,并对其各自的优缺点进行了分析。     

含噪混合盲扰信分离中联合降噪技术研究

针对盲扰信分离技术在含噪混合条件下分离效果差的问题,文章采用经验模态分解和小波变换联合的降噪技术进行分离前的消噪预处理,研究了联合降噪的三种模式,分别对其降噪效果进行了仿真分析,得到了一种较好的联合降噪模式。将该模式与无噪环境下的盲分离算法相结合,弥补了经典盲源分离算法处理含噪混合盲扰信分离的不足。仿真结果表明该算法在一定范围的低信噪比条件下,能够从含噪的混合信号中恢复出通信信号源。