跨层次建模仿真方法研究

为提高体系对抗仿真精度,提出体系对抗仿真领域面临的三大问题,并认为跨层次建模仿真的方法可以较好地解决这些问题,并逐一阐述了跨层次建模仿真方法在解决这3个问题(不确定性、多分辫率、多视图)的有效性.创新之处在于沟通了底层仿真和高层仿真,用跨层次建模仿真的方法解决仿真领域中的难题.     

以科学发展观为指导改革和创新军校政治理论课教学

新时期军校政治理论课教学与改革必须坚持以科学发展观为指导,转变教育理念,充实教学内容,改进教学方法,着力建构以学员为本的政治理论课教学模式,推进军校政治理论课教学全面协调可持续发展.     

浓缩富集＋基因芯片快速检测水体中致病菌

为了实现对水体致病菌的快速检测和监控,研究开发了一套预浓缩富集配合基因芯片检测的方法,对模拟和实际水样进行了检测,并与传统检测方法进行了比较。结果表明,通过对水样的浓缩集菌,基因芯片对致病菌的检出率（以肠炎沙门氏菌为单一检测对象）达到1．0×10^3cfu／mL,较原来提高了100倍;可以在8h内同步完成13种对人类有重大危害的致病菌的快速检测。     

基于Multi-Agent的坦克分队作战仿真系统

在作战仿真系统中,坦克是一种重要的武器仿真实体,其分队战术训练仿真常成为研究的重点。基于坦克分队战术综合演练仿真系统的研制,运用多智能体技术,着重从基于Multi-Agent的坦克分队作战仿真模型结构以及系统设计等方面进行一定的研究。实践证明,该构建的仿真系统效果逼真,精度较高,能较好地满足坦克分队作战仿真的需要,并可为以后分队作战智能化仿真研究提供一定借鉴。     

立足驻地特点加强和改进思想政治工作

立足驻地特点加强和改进思想政治工作,必须正视社会意识形态领域矛盾斗争的尖锐复杂性,始终把拒腐防变作为永恒课题,保持部队的性质宗旨和本色;正视社会维稳形势的严峻性,始终把服务中心作为价值指向,保证部队有效履行使命;正视经济社会发展的地区特殊性,始终把争创一流作为目标要求,牵引部队建设科学发展;正视改革开放实践经验成果的辐射性,始终把改革创新作为动力源泉,提高思想政治工作的整体效益.     

一种新的基于特征值分解的双站无源定位算法

在自卫式噪声干扰的条件下,地面制导雷达将无法得到目标的斜距信息,无法实现对目标的定位,此时只有采用雷达组网方式,利用2个或多个雷达站的测角信息来对空间目标进行定位。提出一种基于特征值分解的新的定位跟踪算法,该算法具有计算简单、清晰,运算量小的优点,仿真也表明该算法有较好的精度。     

Numerical studies on four-engine rocket exhaust plume impinging on flame deflectors with afterburning

This paper studies the four-engine liquid rocket flow field during the launching phase. Using three-dimensional compressible Navier-Stokes equations and two-equation realizable k-epsilon turbulence model, an impact model is established and flow fields of plume impinging on the two different shapes of flame deflectors, including wedge-shaped flame deflector and cone-shaped flame deflector, are calcu-lated. The finite-rate chemical kinetics is used to track chemical reactions. The simulation results show that afterburning mainly occurs in the mixed layer. And the region of peak pressure occurs directly under the rocket nozzle, which is the result of the direct impact of exhaust plume. Compared with the wedge-shaped flame deflector, the cone-shaped flame deflector has great performance on guiding exhaust gas. The wedge-shaped and cone-shaped flame deflectors guide the supersonic exhaust plume away from the impingement point with two directions and circumferential direction, respectively. The maximum pressure and temperature on the wedge-shaped flame deflector surface are 37.2% and 9.9% higher than those for the cone-shaped flame deflector. The results provide engineering guidance and theoretical significance for design in flame deflector of the launch platforms.     

The deformation and failure mechanism of cylindrical shell and square plate with pre-formed holes under blast loading

The deformation and failure mechanism of cylindrical shells and square plate with pre-formed holes under blast loading were investigated numerically by employing the Ansys 17.0 and Ls-Dyna 971. To calibrate the numerical model, the experiments of square plates with pre-formed circle holes were modeled and the numerical results have a good agreement with the experiment data. The calibrated numerical model was used to study the deformation and failure mechanism of cylindrical shells with pre-formed circle holes subjected to blast loading. The structure response and stress field changing process has been divided into four specific stages and the deformation mechanism has been discussed systematically. The local and global deformation curves, degree of damage, change of stress status and failure modes of cylindrical shell and square plate with pre-formed circular holes are obtained, compared and analyzed, it can be concluded as: (1) The transition of tensile stress fields is due to the geometrical characteristic of pre-formed holes and cylindrical shell with arch configuration; (2) The existence of pre-formed holes not only lead to the increasing of stress concentration around the holes, but also release the stress concentration during whole response process; (3) There are three and two kinds of failure modes for square plate and cylindrical shell with pre-formed holes, respectively. and the standoff distance has a key influence on the forming location of the crack initiating point and the locus of crack propagation; (4) The square plate with pre-formed holes has a better performance than cylindrical shell on blast-resistant capability at a smaller standoff distance, while the influence of pre-formed holes on the reduction of blast-resistant capability of square plate is bigger than that of cylindrical shell.     

基于能量均衡的无线传感器网络生命周期延长策略

为了从能量均衡角度出发解决无线传感器网络生命周期延长问题,从而延长整个物联网生命周期,针对无线传感器网络节点遭遇"路由空洞"的时候出现路由中断和生命周期缩短现象,分析能量消耗原理,构建最优跳数模型和能量均衡协议,并提出采用能量均衡的思路减少节点能量消耗。实验仿真发现,应用能量均衡协议使无线传感器网络节点能量分布更加均匀,节点能量消耗时间明显变长,而个别节点能量消耗速度明显大于其他节点的情况得以减少,达到延长无线传感器网络生命周期的目的。仿真结果验证了该方法的可行性。     

微博视域下的国家安全

随着网络的发展,微博对民众日常生活的影响不断增大,其对国家安全的影响也日益凸显,并受到了各界的关注。文章研究微博在其发展过程中所表现出的诸多特点,结合微博在近期国际事件中的作用和影响,分析讨论其对于国家安全的影响,这对于合理控引微博等网络社交平台,维护社会安全稳定,具有十分积极的促进作用。