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131.
132.
运动目标轨迹分类与识别 总被引:1,自引:0,他引:1
运动目标轨迹识别是运动分析中的基本问题,其目的是解释所监视场景中发生的事件,对所监视场景中运动目标轨迹的行为模式进行分析与识别,智能地做出自动分类.对轨迹有效性判断后采用K均值聚类,引入改进的隐马尔可夫模型算法,针对轨迹的复杂程度对各个轨迹模式类建立相应的隐马尔可夫模型,利用训练样本训练模型得到可靠的模型参数,计算测试样本对于各个模型的最大似然概率,选取最大概率值对应的轨迹模式类作为轨迹识别的结果,对两种场景中聚类后的轨迹进行训练与识别,平均识别率较高,实验结果表明该方法是有效的. 相似文献
133.
为提高X射线脉冲星导航定轨精度,依据脉冲星导航原理,建立了X射线脉冲星自主导航系统的状态方程和观测方程,提出用强跟踪扩展Kalman滤波(Strong Tracking Extended Kalman Filter,STEKF)替代扩展Kalman滤波,并对3颗脉冲星卫星运行的位置和速度估计进行了仿真实验。仿真结果表明:STEKF具有使滤波器能够自适应地校正估计偏差并迅速跟踪状态变化的能力,有效地提高了卫星运动状态的估计精度和数值稳定性。 相似文献
134.
George Joffé 《Small Wars & Insurgencies》2016,27(1):1-21
Although the Islamic State in Iraq and al-Sham (ISIS) is seen as a novel manifestation of Islamic extremism, it is in fact the latest, albeit perhaps the most effective, of a long line of revivalist movements in the Islamic and the Arab worlds. Its motivations – hisba and jihad – differ little from its predecessors and its ambitions – to create a state organised in accordance with the precepts of the Islamic caliphate – reflect a long-standing Islamic ambition. It differs, of course, in terms of the sophistication of its political and military strategies, which mirror the contemporary complexities of the world in which it operates, but its objectives recall long-standing Islamic ideals, even if articulated in radically brutal and extremist ways. More importantly, perhaps, ISIS or Da’ish, to give it its Arabic sobriquet, reflects the enormous degree of resentment inside the Middle East at the ways in which Western powers have intervened in regional affairs over recent years, particularly their support for regimes and economic systems there that have betrayed, in the popular imaginary, the essential principles of social justice that lie at the root of Islamic vision of ideal social order. Indeed, in many respects, its analysis of the world in which it operates and of the objectives it seeks differ little in essence from those any other resistance and rejectionist movement, whether religious or sectarian. More specifically, it has been the sectarian conflict that resulted from the reversal of political order in Iraq as a result of the 2003 American-led invasion that has driven the success of the movement in capturing widespread Sunni support. Whether it can manage the complexities of the administration of a state remains open to question. 相似文献
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136.
对潜艇300 kW燃料电池几种可行的气体处理方案进行了对比分析,并运用模糊综合评判方法建立了方案优选模型.研究表明,应用旋转床吸收器吸收废气中的二氧化碳,并配以相应的水处理系统,将二氧化碳排至舷外的方案是最佳方案. 相似文献
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138.
Naomi Kok 《African Security Review》2013,22(3):175-180
The eastern Democratic Republic of Congo (DRC) has been characterised by chaos and insecurity for a number of years, but the rise of the M23 rebellion in 2012 once again highlighted just how dire the humanitarian and security situation is. For most of 2012, the crisis was addressed through negotiations between M23 and Kinshasa, mediated by the International Conference on the Great Lakes Region (ICGLR). However, 2013 marked the signing of the Peace, Security and Cooperation Framework Agreement (PSC Framework), and the United Nations Security Council's adoption of Resolution 2098, which contains the mandate of the long-awaited Intervention Brigade (IB). The PSC Framework calls on Kinshasa to implement substantial political reforms while also urging the neighbours of the DRC to stop interfering in its internal affairs. The IB is mandated to carry out targeted operations against the so-called ‘negative forces’ that operate in the eastern DRC. For now, hope of resolving this ongoing crisis hinges on the continuing ICGLR negotiations, the implementation of the PSC Framework and the success of the IB. However, there are critical questions about all of these processes that need to be answered and understood, as the expectations for these processes – especially in the case of the IB – are extremely high. Will the ICGLR manage to negotiate a peace agreement and will the IB succeed, or will they go down in history as yet another failure to save the eastern DRC? 相似文献
139.
Armed conflict on the African continent has witnessed increasing recruitment of child soldiers, often at the hands of non-state armed groups. Unfortunately this practice continues unabated in the face of legal obligations prohibiting the recruitment of child soldiers under international humanitarian law, and international and regional human rights law. While international condemnation of the practice has led to attempts to increase the minimum age for recruitment to 18, a disjuncture persists between the legal obligations states sign up to, and the actual enforcement of these prohibitions at a domestic level. International criminal law jurisprudence emanating from the Special Court for Sierra Leone and the International Criminal Court is being monitored closely, as these courts seek to enforce the prohibition in all armed conflicts, and against both state actors and non-state armed groups. International humanitarian law only protects child soldiers who have been unlawfully recruited. In this piece, the authors take a closer look at what amounts to unlawful recruitment in light of customary international humanitarian law, since this body of law also binds non-state actors, even without further criminalising legislation at a domestic level. Moreover, the article briefly explores whether a child can ever void this protected status by volunteering to participate directly in hostilities. 相似文献
140.
Michael Steinberg 《Defense & Security Analysis》2013,29(1):68-75
In principle, national sovereignty is the right of a nation to govern its internal affairs without foreign interference. In practice, it is defined by one's interpretation of international law, which may permit legal external intervention under some circumstances, ultimately removing a nation's sovereignty. This paper will examine the current system of international law outlined by the United Nations, analyse the ambiguities contained within its Charter and elaborate on how external intervention can be justified. The case-study of recent developments related to Libya will demonstrate that the manner in which international law is interpreted is changing the notion of principles of sovereignty. 相似文献