基于非负矩阵分解的电磁超声系统优化研究

针对孤立脉冲群电磁超声系统信号特征容易被噪声淹没的问题,提出基于改进的非负矩阵分解（INMF）优选特征的支持向量机（SVM）方法．首先,用3种不同的方法提取高维特征;其次,用NMF方法实现特征降维,并保证降维结果的唯一性,避免对特征的直接选择;最后,应用支持向量机方法对降维特征进行分类．对孤立脉冲群电磁超声系统采集的4种信号特征进行提取、选择和分类,实验结果表明：INMF方法能有效提取微弱信号的特征,减少运算量,提高电磁超声系统特征采集的准确率．     

The effect of foreign state support to UNITA during the Angolan War (1975–1991)

ABSTRACT

State support for foreign rebel groups has become more salient, yet it remains unclear how this affects armed conflict. This paper therefore analyses the effect of foreign government assistance and does so in the typical case of the Angolan War (1975–1991). It argues that South African and United States support greatly helped the National Union for the Total Independence of Angola (UNITA) wage a large and sustained insurgency campaign but was ultimately insufficient to overthrow the People’s Movement for the Liberation of Angola (MPLA) government because it enabled the incumbent government to obtain similar foreign assistance and because the level of aid awarded to UNITA fluctuated strongly, preventing it from engaging in meaningful long-term planning.     

导弹武器维修保障装备规模优化

维修保障装备是在信息化条件下的导弹武器保持良好技术状态的关键组成部分。首先阐述了维修保障装备的概念,对维修保障装备体系结构进行了描述;然后立足于系统动力学理论,建立了考虑攻防对抗的维修保障装备规模优化SD模型,深入开展了维修保障装备配置仿真分析,得出了一些有意义的结论,并验证了模型及方法的有效性。     

装备保障抽组力量物资装载模型

对装备保障抽组力量的物资装载问题进行了数学描述,建立了以实现全部物资尽量分散装载为目标,以同类物资集中装载、车辆承载物资总体积不超过车辆有效容积、车辆承载物资总重量不超过车辆标记载重量、物资必须装载且不被重复装载等为主要约束的数学模型,并进行了求解.最后通过实例解算验证了模型的有效性.     

The Kurdistan Workers' Party (PKK) and popular support: counterterrorism towards an insurgency nature

The PKK has been a prolonged problem in Turkey, and various measures have been adopted to diminish and end the violence. In addition to the impacts on violence, these policies have also had an impact on public opinion and ethnic awareness of Kurds in Turkey. This article analyzes these policies and their effects on electoral support for the PKK by examining the vote shares of the pro-PKK political parties in national and local elections. It concludes that Turkey has conceptualized the issue solely as a problem of terrorism, but the goal, strategy, organization, and format of violence used by the PKK reflect the nature of an insurgency. Therefore, it is argued that Turkey, by ignoring the insurgency features, has disregarded the legitimate parts of the cause and related popular support, and thus has responded mostly with deterrent measures apart from the reforms of recent years. Results have shown that policies of deterrence culminated in a steady level of support for the PKK indicating that low level of legitimacy – as they were perceived by the people – of the policies resulted in viable popular and political support for the PKK. Despite the recent accommodative reforms, the existence of pro-PKK parties rallying electoral support in the political arena provided sustained level activities in the conventional politics in Turkey's municipal and national political system, in which they pursue pro-PKK agendas, such as ‘Autonomy’ and ‘Confederation’ as well as activities to increase the distinction in identity around the ethnic consciousness for more popular support. Yet, no clear pattern is identified between violence level and popular support in the macro-scale.     

大学生领悟社会支持与应对方式的相关研究

对某校1000名本科生进行问卷调查,考察大学生应对方式特点和社会支持水平之间的关系。方法:领悟社会支持量表(PSSS)、《简易应对方式问卷》(SCSQ)作为测查工具,测查了1000名大学生。结果:①生源变量在领悟社会支持和应对方式各维度上差异没有统计学意义。②领悟社会支持和应对方式在性别、年级、专业变量上有显著差异,男性多运用积极应对方式;大二学生在消极应对方式上得分最高;大四学生他人支持和积极应对方式上得分最高。③领悟社会支持和积极应对正相关,领悟社会支持得分越高,越倾向采取积极的应对方式。     

防空旅(团)战斗保障体系效能评估模型

防空旅(团)战斗保障体系的效能是形成良好防空作战能力的关键因素之一,结合防空旅(团)的实际情况,建立了防空旅(团)战斗保障体系的效能指标体系,应用AHP法(层次分析法)确立了各因素的权重,给定了防空旅(团)战斗保障体系效能的评价指标,采用模糊综合评判,建立了二级的评估模型,实现了对防空旅(团)战斗保障体系效能的量化评判模型,并通过实例分析证明了该方法的可行性。     

装备保障系统信息化评价指标体系研究

在分析装备保障系统信息化特点的基础上,确定了建立评价指标体系的原则,建立了从信息化组织建设、信息基础设施和系统应用信息化程度三个方面分析,包含30个评价指标的装备保障系统信息化评价指标体系。     

网络中心战及其对装备精确保障的几点启示

介绍了网络中心战的产生背景及发展历史,研究归纳了网络中心战的概念及内涵,分析了网络中心战原理,探讨了网络中心战对实现装备精确保障的一些启示,提出了我军在实现装备精确保障过程中借鉴网络中心战理论的构想及应注意的问题.     

战时营房保障资源动员能力模糊综合评判

战时营房保障资源动员是战时国民经济动员的重要组成部分。提高战时营房保障资源动员能力是做好战时营房保障资源动员工作的关键。由于影响营房保障资源动员能力的因素较多,既有定性的,又有定量的,且各因素又难以精确地描述,所以其评判过程具有模糊性。通过建立评判指标体系,应用模糊综合评判方法对战时营房保障资源动员能力作出评判,该方法具有较强的应用价值。最后,给出了一个应用实例。