基于移动代理的目标跟踪WSN体系结构设计

在目标跟踪WSN网络中,引入移动代理技术,选择性地访问传感器节点和融合数据,能极大地提高WSN网络的性能。提出了一种基于移动代理的WSN目标跟踪网络体系结构,对网络中的移动代理进行了分类,定义了各类移动代理的功能和结构,建立了基于移动代理的目标跟踪工作流程。最后通过仿真实验,验证了随着网络节点数量的增加,提出的目标跟踪WSN结构的与传统的C/S模式目标跟踪WSN结构相比,单位负载量等性能指标上具有较大的优势。     

网络学习模式识别移动代理因素提取方法研究

从分析网络学习因素的角度出发,提出了利用数据融合理论和使用移动代理技术解决网络学习模式识别的问题。详细分析了网络学习模式中的主要因素,针对网络学习模式识别提出了使用移动代理(MA)进行因素提取的方法。同时运用数据融合技术中分布式缠绕判决模型进行描述,从而使有效地获取网络学习者的学习状态变为可能。也对网络学习因素提取MA的执行环境进行了具体阐述。设计了因素提取MA体系结构,分析了因素提取的执行过程,采用ATP层代理传输协议作为移动代理系统的应用层协议,负责学习模式识别的因素提取。     

分层分布式分群监控体系下的网格资源发现机制

网格中资源发现机制是把资源提供者和资源请求者联系起来的重要环节.在分析分层分布式分群监控体系结构和现有资源发现机制的基础上,提出将集中式目录服务、资源路由表和移动代理三种机制相结合的网格资源发现机制.实验验证该机制在小范围内查找具有性能高效的特点,而在大范围内查找减少了资源发现代理的分发数量,降低了系统消息的负载,进而降低了网络资源的占用.     

Ad Hoc高动态路由协议仿真与研究

Ad Hoc网络是一种没有固定设施的无线移动自组织网络,动态变化的拓扑结构对路由协议的性能有着重要影响。研究了DSR,AODV和OLSR 3种传统路由协议,以OPNET软件为仿真工具,设计了空中飞行平台网络拓扑结构背景的高动态仿真方案,采用随机恒定速度移动模型(RCS),使得仿真场景更加贴近高动态移动节点动态性能。通过比较网络时延、归一化网络吞吐量、路由负载和数据传送成功率等参数,分析了它们的性能。仿真结果表明,OLSR协议的综合性能优于其他协议,更适合于节点高速移动且网络拓扑结构频繁变化的Ad Hoc网络,并为下一步研究打下基础。     

一种基于VMN的移动IP快速切换方法

为了满足用户对移动IP服务的安全性、低时延方面的要求,弥补现有移动IPv4协议中切换方案的不足,在移动IP/AAA模型的基础上,提出了一种基于VMN(虚拟移动节点)的移动IP快速切换方法。该方法增强了移动IP联合AAA的基本模型,并在MA(移动代理)上构建了一种新的数据结构;通过在NFA和OFA之间建立一个新的双向隧道,将VMN中的数据报文进行快速转移,在没有数据报文丢失的情况下,实现了快速低时延的切换;通过分发新的临时安全关联以及认证票据,有效地提高了移动IP在注册和切换过程中的安全,同时有效地降低了AAAH和AAAF之间的网络负载;通过对该方法进行安全性分析和仿真试验表明,我们提交的方法是安全有效的。     

基于移动代理技术的入侵检测系统结构模型

在对移动代理进行研究的基础上 ,提出了一种基于移动代理技术的入侵检测系统结构模型 ,该模型充分利用了移动代理技术的特点和软件代理技术的优势 ,能够解决目前入侵检测系统设计和实现中存在的某些缺陷[1] 。     

基于代理群的军事自组网拓扑搜索算法

分析现有网络管理模式的基础上,针对军事移动自组网的特点,提出了一种基于动态代理群的网络管理模式,并实现了动态代理群网络管理模式的网络拓扑结构搜索算法,最后对该拓扑搜索算法的有效性、正确性及复杂度进行分析论证.实验证明该算法可以很好地解决节点频繁移动带来的需要实时反映网络拓扑结构的问题.     

基于移动代理的电子商务安全方案

将移动代理技术引入电子商务具有很多的优势,同时也对电子商务的安全性问题提出了新的挑战。文中构建了一个基于移动代理的电子商务模型,分析了模型中存在的安全问题,提出了一个改进的电子商务安全方案.改进方案采取分层的结构,从不同的层次保证移动代理的安全和电子商务信息流和资金流的安全.实验结果表明,该方案是切实可行的。     

基于链路质量评估的飞行自组网抗干扰多路径路由协议

随着通信网络不断向各领域延伸,飞行自组网作为一种新型移动自组织网络,以飞行器作为空中无线通信节点建立网络,实现网络层高效通信.首先,通过考虑链路质量、流量负载和空间距离构建多路径路由模型,并设计抗干扰的多路径路由算法;其次,构建基于源节点路由回复包接收速率的解析模型;然后,对模型进行分析与评价;最后,通过仿真实验验证所...     

基于非对称balls-into-bins的高效平衡负载分配模型

在大规模数据中心和P2P覆盖网络等复杂网络负载平衡分配中,前人提出了多种多样的负载分配方法,但许多方法为了达到更好的平衡负载指标,追求越来越复杂的算法,使得时间复杂度和算法复杂度很难控制在合理的范围之内。本文在研究了经典balls-into-bins、Azar balls-into-bins和balls into non-uniformbins等模型的基础上,提出了一种新颖高效的非对称balls-into-bins平衡负载分配模型,该模型具有异构的balls、异构的bins,以及不同的bin选择概率,能以很高的概率将最大负载均衡地控制在合理的范围内,通信负载很小,且具有很好的可扩展性,通过拓展,该模型在负载平衡的诸多领域都将有广阔的应用空间。     

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.     

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).     

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.     

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.     

The UK,interrogation and Iraq, 2003–2008

The UK’s interrogation operations during the conflict in Iraq (2003–2008) are often portrayed by the media as involving significant amounts of mistreatment. This article demonstrates that these practices are not necessarily representative of the UK’s interrogation operations across this conflict. In doing so it contributes to the limited literature on the practice of interrogation and on the UK’s combat operations in Iraq. The UK’s interrogation capability, and therefore its intelligence-gathering capability, is shown to have rested primarily with the military’s Joint Forward Interrogation Team (JFIT). The JFIT suffered from limitations to the number, training and experience of its interrogators and interpreters. It is argued that maintaining a permanent, higher level of preparedness for interrogation by the British armed forces is desirable.     

Remembering and forgetting Mirambo: Histories of war in modern Africa

ABSTRACT

While the study of organised violence is considered essential to understanding the history of the West, and accordingly imbued with various layers of meaning and remembrance, war is widely regarded as inimical to the modern nation in Africa and stable development more broadly. Using examples drawn from primarily from East Africa, this paper considers the ways in which warfare in the deeper (‘precolonial’) past has been framed and envisioned in recent decades, in particular by governments whose own roots lie in revolutionary armed struggle and who began life as guerrilla movements. While in some cases particular elements of the deeper past were indeed mobilised in pursuit of contemporary political goals, in many other scenarios histories of precolonial violence were beheld as problematic and unworthy of remembrance. This paper highlights the paradox and ambiguity which has attended the memory of key aspects of Africa’s deeper past.     

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.     

SIM—LISP:一个通信网络管理专家系统外壳的设计与实现

本文介绍了笔者为开发名为OONMES的网络管理专家系统所实现的一个简单专家系统工具SIM-LISP。SIM-LISP是一个用C/C++语言来实现的模拟LISP语言的可调用函数集,它短小精巧,速度快,可以完成针对网管专家系统的事实或规则知识的表示、匹配、合一和推理等基本操作,并有与知识对象的连接功能,是网管专家系统内核实现的支撑环境。     

Al Qaida on the US invasion of Afghanistan in their own words

This article consists of selected translations from captured interviews and dairies of Al Qaida members. The time period covered is from mid-2001 to early 2002 and concerns their operations in Afghanistan. The material clearly conveys a range of emotion, from confident to despondent, as well as efforts to contest the US actions. The first several pages give the reader context and some possible “lessons learned,” but the story(ies) are best told by the Al Qaida members themselves. All names are pseudonyms.     

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.