具有吞吐量和时延约束的软件无线电波形部署决策算法

针对当前具有吞吐量和时延约束的软件无线电波形部署决策算法在内存开销方面考虑的不足,提出一个更为通用的波形部署决策系统模型,将波形的处理开销、内存开销和通信带宽开销都纳入到波形部署决策过程中,并设计了一种基于动态规划的波形部署决策算法以最小化波形对平台各种计算资源的占用总和。仿真结果表明,内存对波形部署决策具有重要影响,与未考虑内存开销的解决方案相比,平台支持的平均最大波形数目和平均处理资源利用率均下降40%左右。     

留预备队的思想与预备队最佳预留方案研究

根据兰彻斯特方程、作战理论以及运筹学原理,提出了战争（战斗）预备队力量使用最佳方案的概念,并建立了预备队最佳预留模型,提出在兵力一定的情况下是否留预备队主要取决于交战双方实力差强度函数R,并利用预备队预留值比较函数B确定预留队预留的策略.解决了在有限资源的情况下进行战争（战斗）各种力量的合理使用问题,使有限的资源发挥最大的效益.     

战场运输在线路径规划算法研究

针对战场运输保障任务批次多,不确定性强等特点,提出了一种轻型在线的运输路径规划算法。以节省整体运输开销为目标,利用图论思想对运输路径的相互关系进行了数学建模,定义了路径连接的必要条件和合并算子。并借鉴了节约法等启发式方法的思路,提出了一个路径优化合并方法和相应在线调度算法,能够按照负载平衡和最小开销策略分配运力,按需对现有任务合并。模拟实验结果表明,与过去按分管关系指派任务的方法相比,运输开销得到显著减小。     

实时应用中的内存锁定技术研究

内存锁定是一种保证某进程驻留在内存而不需换页的方法。在实时环境中 ,系统应保证将某进程锁定在内存中 ,以减少数据访问、指令读取、进程间缓冲区切换等等引起的延迟。将一个进程的地址空间锁定在内存中 ,就为应用的响应时间满足实时需要提供了保障。一般来说 ,对时间要求苛刻的进程应锁定在内存中。本文主要以实时环境为背景 ,阐述了内存锁定和解锁函数以及在多进程下内存锁定技术的应用。     

MPI并行程序中通信等待问题的诊断方法及其应用

随着并行规模的扩大,现有通信等待问题的诊断方法存在内存开销大、测量时间开销大等问题。通过对现有通信等待问题诊断方法的深入分析,同时考虑测量开销可控的实际需求,建立基于热点函数的通信等待问题诊断模型。基于上述模型,总结出一种更精简、更实用的通信等待问题诊断方法。将该诊断方法分别应用到二维LARED集成、LARED-S、LAP3D等大规模MPI并行程序的通信等待问题诊断过程,应用效果表明本诊断方法可精确定位导致通信等待问题的关键代码段,给出的优化方案及性能提升空间对于后续的程序改进具有参考价值,其中根据诊断结果优化后的LARED-S程序性能提升32%,通信等待时间减少44%。     

邻近支持向量机的阵列波束优化

针对标准支持向量回归波束形成器的计算复杂度高、内存开销大、训练速度慢的缺点,提出了邻近支持向量机(Proximal Support Vector Machine,PSVM)波束优化方法。PSVM打破了通过对偶问题求解原问题的传统思维,将支持向量回归的约束条件等式化,直接对原问题进行分析与求解,给出了基于PSVM波束形成器的优化模型及具体实现过程,并进行了数值仿真实验。研究结果表明,在保持波束形成器性能基本不变的情况下,降低了计算复杂度,减少了内存开销,提高了训练速度。与传统的支持向量回归波束形成相比,具有良好的快速性,为波束形成器的优化设计提供了一种新的有效方法。     

RSVP协议在军综网视频监控系统中的应用

为了改进基于军综网的视频监控系统信号传输质量,提出了在视频流链路节点上配置资源预留协议(RSVP),为视频流传输预留专用带宽的方法,保障视频信号的有效传输。通过实例介绍了RSVP的部署方法以及部署后的运行情况,分析论证了在视频流通过的相关节点配置RSVP协议是可行的,该方法能够改善视频流的传输质量。     

移动业务的SCPC按申请分配卫星通信系统的设计

移动卫星系统(MSAT)计划为加拿大本土大面积地区的广大用户提供移动通信业务,以按申请分配 SCPC 通道来达到对有限频谱的充分利用。本文主要叙述移动通信业务按申请分配多址联接(DAMA)系统的技术条件和设计,重点放在用于提供用户/控制器接口的信令方案上。短呼叫保持时间特别要求有低的信令开销和低时延,导致在系统实现上采用了新型的混合技术。     

军用桥梁随机振动有限元分析研究:多个及分布随机荷载作用下梁的随机响应

本文利用桥梁的振型函数,对多个及分布随机荷载作用下梁的随机振动,用分离变量法将持动微分方程分散为一组常微分方程从而将弹性体的随机振謦换为常系数线性系统的随机振动,通过建立梁的频率响应函数和单位脉冲响应函数,利用有限元方法求解方程。     

基于门限的无线传感器网络密钥管理方案

由于无线传感器网络在能量消耗、内存开销和计算能力等方面的局限性，传统的网络密钥管理方法已不适用。为此提出了一种适用于无线传感器网络的密钥预分配方法——基于（t，n）-门限方案，给出了密钥分配方法，并从方案的连通性、安全性等方面进行了有效的分析，结果表明该算法在这些方面有一定的优势。     

Terrorism,insurgency, kidnapping,and security in Africa's energy sector

Energy continues to serve as the bedrock of modern economies and the main driver of modern society. For Africa, the production and supply of energy resources such as crude oil, natural gas, uranium, coal, biomass, biofuels and other renewables are an important source of employment, rents, taxes, royalties and profits. This sector brings in several tens of billions of dollars of revenue annually. The production and delivery of such resources, however, depend on critical infrastructures such as pipelines, refineries, processing plants, terminals, rigs, electrical energy pylons, substations, pump stations, vessels, and tankers. These infrastructures have been attacked by terrorists, insurgents, vandals and saboteurs, all of whom see them as targets against which to register their grievances and extract concessions from the state. This paper is a chronological account of some of the documented incidents of terrorism, insurgency, kidnapping, destruction, sabotage, and human casualties suffered in the oil and gas sectors in Africa between 1999 and 2012. It is based on data extracted from the databases of the RAND Database of World Terrorism Incidents and the University of Maryland's Global Terrorism Database (GTD).     

Helping hands: civil–military cooperation and Italy's military operation abroad

In the Post-Bipolar Era the growing complexity of the military operations requires a new approach for the resolution of international crises. Since the end of the Cold War, peace support operations (PSO) have become the mainstay and principal occupation of most Western armies. At the same time, Italy has been one of the most important actors in such an area. The article focuses on the cooperation between military and civil components (a process called CIMIC) as a key variable in the Italian PSOs. We will analyse in detail the main lessons learned from past military interventions as well as the general context in which new tendencies are taking place. The maintaining of a minimum security frame becomes essential to fulfil activities ‘collateral’ to the mission: reconstructing services and infrastructure, food distribution, water and medication, law and order, de-mining, training of local forces, and supporting local institutions. These are the main tasks to obtain thrust and support from the population.     

Tacit support for terrorism: The rapprochement between the USSR and Palestinian guerrilla organizations following the 1967 war

This article demonstrates the inconsistent and wavering Soviet attitude towards national liberation movements in general and the Palestinian organizations in particular. Until the late 1960s, the Soviets viewed these organizations with suspicion, hesitating to engage in political dialogue with them. However, in the 1970s, political and military events in the region, as well as modifications in the Kremlin's Cold War strategies, led to a general shift towards the Middle East in Soviet foreign policy. Soviet leaders showed increased willingness to provide certain Palestinian organizations with arms with which to conduct terrorist activities against Israeli, pro-Israeli, Jewish and Western targets. The article explores the complex relations between Palestinian organizations and the USSR in the field of international terror. The study also exposes and analyzes the nature and content of Soviet–Palestinian arms dialogues and transactions. It provides clear evidence that Soviet policymakers and other luminaries were fully informed of, and sometimes directly involved in, these transactions and dialogues at the highest levels.     

A1 Qaeda and the radical Islamic challenge to western strategy

The September 11 global crisis prompted by the attacks on the World Trade Center and the Pentagon raises major questions concerning the nature and trajectory of terrorism in the post-Cold War global order. Hitherto, terrorism has been largely debated by analysts at the level of nation states. Terrorist and insurgent movements have also been largely anchored in nationalist and ethnic power bases even when they have sought to mobilise a transnational ideological appeal on religious or class grounds. There have been a few exceptions to this pattern such as the alliance between the German Baader-Meinhof group and the Japanese Red Army Faction, but even such international alliances as this did not, until at least the 1980s, presage anything like a global terrorist network necessitating a global strategic response. This study examines terrorism and global strategic responses.     

Helping hands: external support for the KNU insurgency in Burma

This article analyses to what extent the Burmese KNU insurgency made use of external support from states, refugees, and diasporas. Based on extensive fieldwork it is concluded that support from neighbouring states and refugees has for years kept the Karen rebellion alive. Western countries perceived forms of resistance to the illegitimate Burmese regime as just and have therefore played a crucial role in the continuation of conflict in Karen State. It is important that policymakers and donors as well as executing organizations continue to reflect critically on the way they exercise their work.     

基于GTST-DMLD-ESD的装备RMS建模仿真

装备的RMS是装备的重要设计参数,是影响战备完好和保障能力的关键因素.引入GTST-DMLD作为主要建模工具,建立起装备系统的RMS描述模型,以ESD为补充和扩展,对维修过程进行建模.并以GTST-DMLD-ESD模型作为装备RMS仿真的核心,对装备RMS仿真模型的总体框架进行了研究,并对各模块进行了较为详细的探讨.     

Cyber sheiks and grassroots jihadis: the war in Syria and the devolution of the Bosnian Salafi communities

ABSTRACT

What was the scope of the Bosnian jihadi participation in the war in Syria? Did the Bosnian volunteers tend to join one particular faction? Why did the Bosnian youngsters decide to join the holy war in the Levant? Was this an organized and hierarchical process or was this a grassroots movement? Last, were all the Salafis in Bosnia supportive of this dynamic or did this process cause internal frictions? These are some of the questions that this research will try to answer.     

Country survey XVI the defence sector in the economy of a declining superpower: Soviet Union and Russia, 1965-2001

The Soviet Union was able to develop a large military-industrial complex and become the world's second superpower despite deficiencies in its centrally planned economy because defence was given high priority status and special planning, rationing and administrative mechanisms were used to attain national security objectives. However, in the period 1976-85 the effectiveness of priority protection diminished and defence institutions experienced more of the problems typical of the shortage economic system. The heavy defence burden also created growing difficulties for the civilian economy. The attempts by the Gorbachev government to reform the defence sector and improve defence-economic relationships during perestroika (1985-91) uniformly failed. For most of the transition period, the Russian military-industrial complex has been adversely affected by its low priority status, cuts in defence spending, instability of the hybrid politico-economic system, and negative growth of the economy. The armed forces and defence industry have been reduced in size and their outputs of military services and equipment have fallen to low levels. Nevertheless, the Russian armed forces still have over one million troops, significant stocks of sophisticated conventional weapons, and a large nuclear arsenal. The government of President Putin has raised the priority of the defence sector, increased real defence spending, and adopted ambitious plans to revive Russian military power. It is likely, though, that tight resource constraints will hamper efforts to reform the armed forces and to upgrade weapons. By 2010 Russia will be an important, but not dominant, military power in Eurasia.     

Traffickers,terrorists, and a ‘new security challenge’: Russian counternarcotics strategy and the Federal Service for the Control of the Drugs Trade

The collapse of the Soviet Union precipitated the massive expansion of drug use and trade in Russia. The country now has one of the largest populations of injecting drug users in the world and has become the largest single-country market for Afghan heroin. In 2003 the Federal Service for the Control of the Drugs Trade was created to coordinate a comprehensive counternarcotics strategy appropriate to the scale of this threat. The service continues to face a number of challenges in its early stages of development. However, it has made considerable advances in improving responses to large-scale organised crime and in building international cooperation.