一种攻击机动目标的变结构导引律研究

无人机在快速接敌的过程中,传统比例导引法系数的最优解与目标和载机的距离有关,而且一旦目标机动或增加了干扰,跟踪效果都会变差.为了解决这一问题,提出了一种变结构的跟踪方法.仿真结果表明:该方法在未知目标距离的情况下能够快速接敌,且能减小无人机所需过载,提高制导精度和跟踪鲁棒性,限制了视线角速度.     

气动力/推力矢量复合控制空空导弹最佳转弯规律

针对气动力/推力矢量复合控制空空导弹大离轴角发射的快速转弯问题,根据bang-bang控制理论,给出了导弹终端弹道角受限情况下,以最大末速为性能指标的最佳转弯规律.针对空空导弹纯气动力控制和复合控制两种情况,分别进行了初制导弹道的设计和仿真.结果显示,在中空低速发射时,采用后者转弯性能明显高于纯气动力控制导弹,而当初速高于1.2 Ma时,二者转弯性能非常接近.     

弹着时间可控的机动目标多弹协同制导律*

针对机动目标的多导弹齐射攻击,运用最优控制和卡尔曼滤波理论探索机动目标下弹着时间可控制导律问题。设计了一种最优弹着时间可控的制导律,它由指定弹着时间和预计弹着时间的误差作为反馈信号与传统比例制导律结合推导得出,称之为弹着时间可控制导律（Impact-time-control Guidance Law,简称ITCG）,同时利用卡尔曼滤波估计了目标加速度。通过对作战模型情况的仿真,可以看出这种新型的制导律应用于引导多发导弹以指定时间同时攻击目标时的有效性和可行性。     

Deviant globalization: the application of strategic landpower*

In both Afghanistan and Iraq, US landpower was able to gain control rapidly over terrain. However, that control ebbed as US presence weakened. Non-state actors, such as the Taliban, the Haqqani network, the Islamic State, and Al Qaeda, gained control of segments of the population. Transnational Criminal Organizations capitalized on this permissive environment to strengthen their networks, often eroding the legitimacy of the host nation government, fueling regional instability, and, ultimately, undermining US policy objectives. The proliferation of deviant globalization, or the connectedness of subversive elements, is a key indicator of future conflict. Strategic landpower is uniquely positioned to influence the physical, psychological, economic, and social interactions of various non-state actors and their association with deviant globalization. It is no longer enough to seize and hold terrain. Landpower must also have the capability to influence the actions and attitudes of populations on that terrain wherever and whenever these interactions occur.     

Right Intention and the Ends of War

The jus ad bellum criterion of right intention (CRI) is a central guiding principle of just war theory. It asserts that a country’s resort to war is just only if that country resorts to war for the right reasons. However, there is significant confusion, and little consensus, about how to specify the CRI. We seek to clear up this confusion by evaluating several distinct ways of understanding the criterion. On one understanding, a state’s resort to war is just only if it plans to adhere to the principles of just war while achieving its just cause. We argue that the first understanding makes the CRI superfluous, because it can be subsumed under the probability of success criterion. On a second understanding, a resort to war is just only if a state’s motives, which explain its resort to war, are of the right kind. We argue that this second understanding of the CRI makes it a significant further obstacle to justifying war. However, this second understanding faces a possible infinite regress problem, which, left unresolved, leaves us without a plausible interpretation of the CRI. This constitutes a significant and novel reason for leaving the CRI out of the international law of armed conflict (LOAC).     

平底气泡船凹槽气层波动特性

为提高大型平底气泡船底部凹槽设计的有效性,基于RANS方程及VOF两相流模型构建了大型平板船凹槽气层数值计算模型。研究气层在凹槽中的动态发展过程,分析速度对气层波动的影响规律,并阐述三维凹槽气层的波形特性及其与二维气层波动的区别,揭示气层波动的相似律。数值结果表明:气层在凹槽中呈现波动形态,气层波长随速度的增加而增大,波长等于速度平方的0.64倍;气层在凹槽侧壁的干扰及反射下呈现相干波系,从而其波高及局部厚度也随之改变;气层波动满足傅汝德相似。     

宽严相济刑事政策的刑法化研究

和谐社会语境下的宽严相济的刑事政策是传统的惩办与宽大相结合刑事政策的复归,它应当是新时期的基本刑事政策。任何刑事政策都应实践性地转化为刑法规范,宽严相济的刑事政策也应当加速其刑法化的进程。我国现行刑罚结构总体上存在着“当轻不轻“‘当重不重”的倒挂性局面,应尽快修改刑法来根本扭转刑罚轻重失衡的局面。宽严相济的刑事政策强调“宽”与“严”二者不可偏废,当下风行于刑法学界的一元的轻刑论应当为我们所摒弃。     

月球返回舱再入制导律设计

针对以接近甚至超过第二宇宙速度再入地球的登月飞行器制导任务,研究了满足热流、过载、落区等约束的返回舱再入制导律。月球返回舱是低升阻比弹道升力式再入飞行器,控制策略是改变倾侧角的符号和大小。倾侧角大小的确定转化为一个单变量非线性方程求根的问题,倾侧角符号的确定依倾侧反转逻辑来满足横向走廊,其中横向走廊设计成速度的函数。通过综合偏差的Monte Carlo仿真评价制导算法的性能,仿真结果表明制导的纵向标准偏差在30km左右,横向标准偏差小于5km。此外,分析了影响滚转速率的因素,给出了调整反馈增益系数和减小滚转速率及制导精度的关系。     

论我国环境法的完善

伴随时代的变迁、经济的发展,我国环境问题日益严重。环境法作为我国环境保护的重要依据虽然在环境保护过程中起到了相当的作用,但由于历史上对环境立法的重视不足及环境法相对现实情况的滞后,其不足之处也开始显现。从不同的角度审视现行环境法,结合当前我国经济社会发展的具体情况及环境保护的现状,在生态本位思想的指导之下提出了一些建议,希望能对我国环境法的完善起到一定的作用。     

论对消防执法程序监督的重要性

在越来越多的消防法律法规不断颁布实施的形势下,作者针对如何对执法程序进行监督,如何更好的让这些法律法规来规范人们的生产和生活进行了分析,指出了当前消防执法程序中存在的问题,并提出了相应的解决办法。