基于云模型的导弹信息作战指挥效能评估

针对导弹信息作战指挥效能评估中既包含定量指标,又包含定性指标,而对这些指标进行科学合理地统一评价尚存在很多困难的问题,运用云模型对其进行了研究。分析了导弹信息作战指挥能力的指标体系,介绍了云模型的相关理论,并给出了运用云模型进行效能评估的详细算法,利用云发生器得到了最终的评估结果。最后给出了一个评估实例,结果证明该方法有效可行,能很好地解决效能评估中定性语言到定量值之间的转化问题。     

The Bush War to Save the Rhino: Improving Counter-poaching Through Intelligence

The rhino is going extinct due to poaching at a rate which far outstrips current law enforcement or conservation efforts to halt their decline. A critical aspect of counter-poaching failures to date is an inaccurate view of the nature of poaching as a crime. Rather than demand-side efforts, attacking elusive smuggling networks or expensive technical solutions like drones, this article notes how a quasi-military tactical approach of ‘combat tracking’ offers the best way to protect the species. Based on wide ranging interviews and fieldwork across dozens of parks in southern Africa, it demonstrates how the current restricted range of the rhino, and the rarity of skilled poachers, makes a tactical solution the most effective to date.     

Anarchy’s anatomy: Two-tiered security systems and Libya’s civil wars

ABSTRACT

No issue deserves more scrutiny than the mechanisms whereby popular unrest unleashes civil wars. We argue that one institution – two-tiered security systems – is particularly pernicious in terms of the accompanying civil war risk. These systems’ defining characteristic is the juxtaposition of small communally stacked units that protect regimes from internal adversaries with larger regular armed forces that deter external opponents. These systems aggravate civil war risks because stacked security units lack the size to repress widespread dissent, but inhibit rapid regime change through coup d’état. Regular militaries, meanwhile, fracture when ordered to employ force against populations from which they were recruited.     

去耦瓦敷设方式对双层壳声振动的影响

文中对有限长敷设隔声去耦材料的加筋双层圆柱壳进行了振动和声辐射试验,测量了壳体的结构响应和水中的辐射声压,对内外壳全部敷设、内壳全部敷设、外壳全部敷设以及外壳部分敷设隔声去耦材料四种敷设方式进行了对比。结果表明,内外壳全部敷设隔声去耦材料对抑制振动和声辐射最有效,而且部分敷设隔声去耦材料对水下航行器敷设隔声材料的位置选择具有一定的参考价值。