British counter‐insurgency in Kenya, 1952–56: Extension of internal security policy or prelude to decolonisation?

Despite considerable post‐war planning, the British counter‐insurgency campaign in Kenya did not constitute a Colonial Office strategy for decolonisation. COIN in Kenya had one purpose: to re‐impose law and order, or British control. If for no other reason, this is demonstrated by the initial reluctance of the Colonial Office to intervene. Frequent re‐assessments and postponement of the ending of the State of Emergency, and the subordination of socio‐economic and political reforms to military objectives, show clearly that decolonisation was not high on the British list of priorities in Kenya. This article questions the relationship between COIN and decolonisation, and the validity of models of British counter‐insurgency.     

火炮身管直线度检测方法及测量元件选择

火炮身管弯曲,轻则降低射击精度,重则阻碍弹丸运动,以致产生膨胀、炸膛事故,直至火炮身管报废。为了发挥火炮的作战效能,提高装备的技术保障能力,该文介绍了可用于检测火炮身管直线度误差的四种方法:量规检验法、杠杆法、指示器法和光轴法,并对其优缺点进行了比较,认为光轴法是一种比较好的轴线直线度测量方法。还根据火炮身管直线度的检测原理,分析了三种非接触直线度测量方法:四象限光电池法、CCD法和PSD法,认为位置敏感探测器(PSD)具有更为显著的优点,是非接触式位置检测的理想接受器件。     

SAW-MTFUOL-P自组装镀膜传感器在检测DMMP中的应用研究

设计制作了11-巯基-1,1-二（三氟甲基）十一醇（MTFUOL）自组装膜声表面波化学传感器（SAW-MTFUOL—P）,利用该传感器对有机膦毒剂模拟剂甲基膦酸二甲酯（DMMP）进行了检测研究。研究结果证实,SAW-MTFUOL—P自组装镀膜传感器对DMMP具有较高的响应灵敏度,且响应时间短、恢复快。     

A produce‐to‐stock system with advance demand information and secondary customers

We consider a manufacturer (i.e., a capacitated supplier) that produces to stock and has two classes of customers. The primary customer places orders at regular intervals of time for a random quantity, while the secondary customers request a single item at random times. At a predetermined time the manufacturer receives advance demand information regarding the order size of the primary customer. If the manufacturer is not able to fill the primary customer's demand, there is a penalty. On the other hand, serving the secondary customers results in additional profit; however, the manufacturer can refuse to serve the secondary customers in order to reserve inventory for the primary customer. We characterize the manufacturer's optimal production and stock reservation policies that maximize the manufacturer's discounted profit and the average profit per unit time. We show that these policies are threshold‐type policies, and these thresholds are monotone with respect to the primary customer's order size. Using a numerical study we provide insights into how the value of information is affected by the relative demand size of the primary and secondary customers. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Network disconnection problems in a centralized network

We consider three network disconnection problems in a centralized network where a source node provides service to the other nodes, called demand nodes. In network disconnection problems, each demand node gets a certain benefit when connected to a source node and a network attacker destroys edges to prevent demand nodes from achieving benefits. As destroying edges incurs expenses, an attacker considers the following three different strategies. The first is to maximize the sum of benefits of the disconnected nodes while keeping the total edge destruction cost no more than a given budget. The second is to minimize the total destruction cost needed to make a certain amount of benefits not accomplished. The last is to minimize the ratio of the total destruction cost to the benefits not accomplished. In this paper, we develop exact algorithms to solve the above three problems. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Dynamic lot‐sizing model with production time windows

We consider a dynamic lot‐sizing model with production time windows where each of n demands has earliest and latest production due dates and it must be satisfied during the given time window. For the case of nonspeculative cost structure, an O(nlogn) time procedure is developed and it is shown to run in O(n) when demands come in the order of latest production due dates. When the cost structure is somewhat general fixed plus linear that allows speculative motive, an optimal procedure with O(T⁴) is proposed where T is the length of a planning horizon. Finally, for the most general concave production cost structure, an optimal procedure with O(T⁵) is designed. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Exact expected values of variance estimators for simulation

We formulate exact expressions for the expected values of selected estimators of the variance parameter (that is, the sum of covariances at all lags) of a steady‐state simulation output process. Given in terms of the autocovariance function of the process, these expressions are derived for variance estimators based on the simulation analysis methods of nonoverlapping batch means, overlapping batch means, and standardized time series. Comparing estimator performance in a first‐order autoregressive process and the M/M/1 queue‐waiting‐time process, we find that certain standardized time series estimators outperform their competitors as the sample size becomes large. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

国防与经济建设协调发展的理论和实践

新中国建立以来,中国共产党根据各个历史时期不同的国际国内现实状况,对国防与经济建设的协调发展问题展开长期不懈的实践探索,形成了一套行之有效的科学理论和指导方针。本文对这一理论的思想基础、形成动因与发展轨迹进行剖析,揭示其对国防与经济建设的重要指导意义。     

装配式管线水力瞬变的非线性流固耦合模型

装配式管线是一种重要的油料保障装备,用于地面铺设,属于典型的薄壁弱约束管线系统。根据装配式管线的特点,应用管道弹性变形理论,推导了水力瞬变状态下装配式管线的非线性流固耦合5-方程模型。该模型充分考虑了管道与流体之间的耦合互动效应,耦合形式包含了泊松耦合、摩擦耦合、结合部耦合,以及管线系统的轴向、横向和径向振动耦合,并计及了管道结构阻尼的影响。针对装配式管线的特殊连接约束方式,提出了一种带有扭转弹簧的铰支型约束边界,可通过确定扭转弹簧的弹性系数来建立管线两端的约束边界方程。