火箭出口面积对RBCC发动机引射模态影响规律分析

火箭基组合循环发动机引射模态飞行状态复杂,为了提高发动机的整体性能,研究了火箭出口面积对发动机引射模态的影响规律。通过数值模拟研究,引射流量在低飞行马赫数条件下,主要受引射性能影响,火箭出口面积越大,引射性能越好。然而,随着飞行马赫数的提升,引射空气的动能提升,隔离段内出现壅塞情况,引射流量主要受限于隔离段几何尺寸,与火箭出口面积无关。在亚声速工况下,火箭出口面积越小,发动机比冲越低,且出口无量纲面积为3.15时,火箭羽流膨胀撞壁,会引起性能骤减,需要予以避免;在超声速工况下,选择面积较小的火箭出口面积,燃烧室内压越高,发动机性能提升越明显。     

电子干扰条件下基于攻击区指挥引导效能评估

针对传统指挥引导效能评估方法缺少对电子干扰因素定量分析的问题,在基于攻击区空战态势评估的基础上,提出了一种考虑电子干扰因素的超视距空战指挥引导效能评估模型。分析电子干扰对导弹攻击区的影响,从指挥引导目的态势分析入手,选取空战能力指数威胁函数和基于空空导弹攻击区的空战态势威胁函数两个指标,进行加权综合建立指挥引导效能评估函数,通过仿真计算验证了该模型的有效性。     

Is strategic studies narrow? Critical security and the misunderstood scope of strategy

Critical security advocates commonly portray strategic studies as crippled by its narrow focus on Cold War-era military issues, as state-centric and as Western-centric. I argue that this conception of the scope of strategy is flawed and I offer a comprehensive rebuttal by working out the logic of the theories advanced by Carl von Clausewitz and Thomas Schelling. The proponents of critical security overlook the striking expansion of strategy during the Cold War, its longstanding inclusion of competing political actors not just states, as well as its capacity to put Western and non-Western actors in a common analytic frame. By breaking out of the conceptual jails in which strategy has been incarcerated, I seek to reconnect International Relations to strategic thought from which it has become increasingly estranged.     

氧气体积分数对油气爆炸特性的影响

作为燃烧和爆炸三要素之一,氧气体积分数的控制对于爆炸事故的防治具有重要意义。实验研究了氧气体积分数对汽油蒸气-空气混合物（简称油气）爆炸极限和爆炸压力的影响。结果表明：随着氧气体积分数的降低,油气爆炸下限呈一阶指数规律缓慢增大,油气爆炸上限呈线性规律迅速减小;爆炸极限范围由0.92%~3.76%缩小为1点,该爆炸极限临界点为1.22%,对应的临界氧气体积分数为11.4%;油气的最大爆炸压力和最大压力上升速率随着氧气体积分数的降低而减小,油气体积分数越大,氧气体积分数影响越显著。     

刑事法律制度差异对海峡两岸合作打击跨境犯罪的影响及对策研究

大陆地区和台湾地区的刑事法律制度存在较大差异,必将影响海峡两岸共同合作打击跨境犯罪工作的开展。海峡两岸应在《海峡两岸共同打击犯罪及司法互助协议》框架下,在协商互信的基础上,本着对两岸刑事法律制度差异的清晰认识,采取合理、有效的刑事对策弱化其对两岸合作打击跨境犯罪的影响。     

移动式排烟在公路隧道火灾救援中的应用探讨

近年来我国公路隧道的建设迅速发展,然而公路隧道由于空间相对封闭,发生火灾情况下的烟气排除成为了难点。结合公路隧道通风排烟方式,探讨临界风速在隧道火灾排烟时的应用,并分析了公路隧道纵向空气流对火灾烟气流动的影响,指出不同流速的空气流对火灾烟气的影响效果不同,同时阐述了隧道内移动风机的气流环流现象。最后提出了基于不同火灾位置的排烟方案,为消防部队隧道火灾的排烟战术提供参考。     

空时频方位关联算法

针对跳频组网通信中不同信号间的时频分隔特点,利用时频重心进行目标方位数据关联,提出了空时频方位关联算法。根据提取的时频特征设计空时频测向的核函数,实现了简化的空时频测向算法。根据时频距离设计代价函数,基于匈牙利算法实现了方位关联结果的最优化二维分配。根据时频距离选择窗函数的类型和长度,有效避免了信号旁瓣泄露对测向精度的影响,显著提高了密集目标条件下的关联正确概率。数值仿真验证了上述观点。     

MILITARY EXPENDITURE AND ECONOMIC GROWTH

This paper tests the relationship between military expenditure and economic growth by including the impact of the share of military and civilian components of government expenditure in an economic growth model with endogenous technology. In this framework, we empirically consider the hypothesis of a non‐linear effect of military expenditure on economic growth. Differences between the costs and benefits of the defence sector has traditionally explained the non‐linear relationship suggesting that shocks to insecurity may also be a source of non‐linearity as they determine a re‐allocative effect within government expenditure. While parametric partial correlations are in line with empirical findings, the robustness of estimations is tested by using a non‐parametric approach. The negative relationship between military expenditure and growth in countries with high levels of military burden predicted by theory becomes significant only after including a proxy for re‐allocative effects in the growth equation.     

特种车辆乘载员生理监测与调节系统

特种车辆乘栽员的生理心理状态与车辆技术状态并列成为影响车辆整体效能的重要因素。针对乘栽员的生理心理状态进行监测并适时干预,可以实时掌握并调整人员状态。既有利于车辆能力发挥,也有利于整体协调。生理监测调节系统拟采用生物传感技术,采集人员生理心理指标参数,通过车辆通信及指控系统网络,使指挥人员能够及时掌握人员的疲劳及生命体征状态．通过合理的心理干预及医疗指导。使人员保持良好的心理生理状态或合理的医疗自救互救,最大程度地保存行动能力。该系统可应用于平时训练及评估．也可应用于行动决策指挥及医疗救护部署。     

地空导弹对地面的附带损伤问题研究

研究了地空导弹爆炸时战斗部破片对地面人员附带损伤的问题,选取了破片对人体的杀伤准则,通过分析破片的空中运动特性,对导弹战斗部爆炸时的破片飞散规律进行了探讨,建立了破片散布的数学模型,并在典型的给定计算条件下进行了仿真分析.仿真结果表明,地空导弹在不同高度爆炸时,可计算出对地面人员的有效杀伤破片数量、破片杀伤面积和平均密度以及导弹的安全高度.