反辐射无人机在电子战中的应用及其效能分析

简要讨论了反辐射无人机系统的组成和两种典型的反辐射无人机,指出了其在电子战中的应用。并针对某型反辐射无人机的系统能力,即命中概率和毁伤概率进行了理论分析和计算。     

一类带配送中心运输问题的容量扩张模型研究

运输问题一般采用表上作业法来解决,考虑一类带配送中心的运输问题,若仍采用表上作业法,会使问题复杂化.文中采用一种构造辅助网络的方法:在运输网络中将每个配送中心均拆分成两个点,连接两点形成新弧,构造出新的网络,并给每条弧赋予参数,将此类运输问题转换为最小费用流模型来解决,可以使问题模型和运算简单化.在此基础上,考虑运输网络中配送中心和边的容量扩张问题.     

Capacity allocation with traditional and Internet channels

In this paper we study a capacity allocation problem for two firms, each of which has a local store and an online store. Customers may shift among the stores upon encountering a stockout. One question facing each firm is how to allocate its finite capacity (i.e., inventory) between its local and online stores. One firm's allocation affects the decision of the rival, thereby creating a strategic interaction. We consider two scenarios of a single‐product single‐period model and derive corresponding existence and stability conditions for a Nash equilibrium. We then conduct sensitivity analysis of the equilibrium solution with respect to price and cost parameters. We also prove the existence of a Nash equilibrium for a generalized model in which each firm has multiple local stores and a single online store. Finally, we extend the results to a multi‐period model in which each firm decides its total capacity and allocates this capacity between its local and online stores. A myopic solution is derived and shown to be a Nash equilibrium solution of a corresponding “sequential game.” © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

An EOQ model with multiple suppliers and random capacity

We consider an EOQ model with multiple suppliers that have random capacities, which leads to uncertain yield in orders. A given order is fully received from a supplier if the order quantity is less than the supplier's capacity; otherwise, the quantity received is equal to the available capacity. The optimal order quantities for the suppliers can be obtained as the unique solution of an implicit set of equations in which the expected unsatisfied order is the same for each supplier. Further characterizations and properties are obtained for the uniform and exponential capacity cases with discussions on the issues related to diversification among suppliers. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

“三个代表”重要思想与社会主义文化建设

党的十六大报告把发展社会主义文化,建设社会主义精神文明,确定为全面建设小康社会的一个重要目标,体现了我们党对文化建设的高度重视。要深刻认识文化建设的战略意义。牢牢把握先进文化的前进方向,用“三个代表”重要思想统领社会主义文化建设。     

大规模 MIMO系统中用户分层变长时隙分配方法研究

大规模MIMO系统时分双工模式中分配的物理时隙长度是固定的,不能根据不同时长的信道相干时间灵活地调整长度,二者长度的不匹配导致部分时频资源的浪费,因此系统的总体容量不能达到最优。针对此问题本文提出一种用户分层变长时隙分配方法,即根据不同终端的移动性对终端进行分层,并为不同层中的移动终端灵活地分配不同时长的物理时隙,使物理时隙长度与移动终端所对应信道的相干时长相匹配,从而减少时频资源的浪费,提高了资源利用率。同时,避免了低速移动终端过频繁的信道估计,降低了信道训练序列开销,使系统的总体数据容量得到很大的提升。实验仿真结果验证了本文所提方法的有效性。     

French Military Adaptation in the Afghan War: Looking Inward or Outward?

ABSTRACT

For some, a specific feature of the French armed forces' adaptation process in the adaptation process would be the capacity to look inward instead of outward in order to identify relevant solutions to tactical/doctrinal problems. This article questions such a narrative, and argues that the French armed forces are as quick as any to borrow from other countries’ experiences. In order to do so, this article introduces the concept of ‘selective emulation’, and compares the French and German military adaptation processes in Afghanistan. The article argues that there is indeed something distinctive about French military adaptation, but it is not what the fiercest defenders of the French ‘exceptionalism’ usually account for.     

Military Innovation Studies: Multidisciplinary or Lacking Discipline?1

This article explores the evolution of the field of military innovation studies, critiquing its theoretical foundations and setting out a number of challenges that must be overcome if the field is to fulfil its potential and enhance its contribution to wider disciplinary debates as well as to the practitioner community. Tensions between the main theoretical approaches to military innovation are examined as are the challenges inherent in its increasingly multidisciplinary character. The issue of whether military innovation studies constitutes a field in its own right is addressed before recommendations are made to expand the field’s research agenda, broaden its theoretical base and strengthen its multidisciplinary credibility.     

基于参数优化的SVM联合作战战场建设方案优选

联合作战战场建设方案优选可最大可能降低建设工程的损耗、提高整体建设效益。针对联合作战战场建设方案优选问题进行研究,首先梳理联合作战战场建设方案优选流程,然后构建包括作战保障工程、后勤保障工程、装备保障工程和战场基础信息数据库的指标体系,并提出基于网格搜索和交叉验证优化的改进SVM方法实施方案优选,仿真结果表明优化后参数的性能明显优于默认参数,更加适用于联合作战战场建设方案优选问题。     

Military expenditure and economic growth in Middle Eastern countries and Turkey: a non-linear panel data approach

The economic growth effects of military expenditure have been the subject of a large literature in defence economics. Theories on the economic impacts of military expenditure greatly differ and include arguments that they either enhance economic growth or crowd out productive investments. Empirical literature on defence expenditure and economic growth nexus generally employs linear specifications to investigate the impact of defence expenditures on economic growth. Although it is now well established that many economic variables may have a non-linear data-generating mechanism, it seems that this reality has long been neglected in empirical work on defence–growth nexus. This paper attempts to fill this gap by employing non-linear panel data models to examine the effects of military expenditures on economic growth for Middle Eastern countries and Turkey, for the time period 1988–2012. Results show that the effect of military expenditure on economic growth is nonlinear such that the state of the economy actually determines the effect of the former on the latter. This is important not only in showing asymmetric relationship between these variables but also in revealing the reasons of mixed results of earlier literature.