Liquid phase in-situ synthesis of LiF coated boron powder composite and performance study

Among practical metal additives, boron (B) has a high volumetric heating value, making it a promising choice as a fuel additive. Although B can theoretically yield a large amount of energy upon complete combustion, its combustion is retarded by the initial presence of B oxide, which coats the surfaces of B particle. To improve the ignition and combustion properties of B powder, LiOH and NH₄F were used as precursors to synthesize uniformly LiF-coated B composites (LiF-B) in situ. The LiF-B mixture was also prepared for comparison using a physical method. X-ray diffraction (XRD), Fourier-transform infrared (FTIR), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS) were used to characterize the morphologies and compositions of the products. The thermal and combustion properties of the samples were characterized by thermal gravity-differential thermal gravity (TG-DTG), differential scanning calorimetry (DSC) and closed bomb experiment. The XRD, FTIR, SEM and EDS results demonstrated the successful preparation of the coated LiF-B sample. The TG-DTG and closed bomb experiment results indicated that the addition of LiF decreased the ignition temperature of B powder, and increasing its reaction efficiency. DSC results show that when LiF-B was added, the released heat of underwater explosive increased by 6727.2, 7280.4 and 3109.6 J/g at heating rates of 5, 10, and 15 °C/min, respectively. Moreover, LiF-B decreased the activation energy of secondary combustion reaction of explosive system as calculated through Kissinger's method by 28.9%, which indicated an excellent catalytic effect for the thermal decomposition of underwater explosive. The results reveal that LiF can improve the combustion efficiency of B powder, thereby increasing the total energy of explosives. The mechanical sensitivity increased slightly after adding LiF-B to the underwater explosive. Compared to the underwater explosive with added B, the mechanical sensitivity of the explosive with added LiF-B was significantly lower.     

基于纯纠缠态的量子安全直接通信协议

基于纯纠缠态,提出一种量子安全直接通信协议.通信方利用decoy光子来检测窃听.在保证量子信道的安全后,发送方通过控制非操作和von Neumarm测量将秘密消息编码在纯纠缠态上并发送给接收方.由于所有的纯纠缠态都用于传输秘密消息,该协议具有较高的量子比特效率.就实验的可行性来说,该协议可以用当前的技术实现.此外,该协议在噪声量子信道中也是安全的.     

防空导弹火力单元战斗效率评估

从防空战斗的实际需求出发,结合现行防空作战运筹理论中存在的问题,提出了防空导弹火力单元战斗效率指标应包括完成射击任务概率和毁歼空中目标数量等分指标的观点,利用概率论和军事运筹等方法,分析了这两项分指标的构成要素及其相互关系,并建立了相应的评估模型,结合实例说明了模型的具体应用.     

ANP在依托C4 ISR的指挥控制效能评估中的应用研究

指挥信息系统（ C4 ISR）作为联系指挥者、指挥对象和武器平台的重要手段，其作用的发挥对指挥体系的整体指挥控制效能具有重要影响。将指挥员、指挥机关、指挥信息系统和所属部队等多种因素作为影响指挥控制效能的主要因素，在分析各因素之间的相互影响及其内部各子因素的相互关系后，采用网络层次分析法（ Analytic Network Process， ANP）建立了指挥控制效能评估的网络模型，并运用Super Decision（SD）软件对模型予以实现。     

防暴驱散车武器配置设计及作战效能评估

从武警部队执行中心任务需求出发,分析了防暴驱散车的功能要求,提出了防暴驱散车作战武器配置方案,建立了防暴驱散车作战效能评估模型。运用模糊层次分析法,通过模糊互补判断矩阵及最小方差算法,将定性分析与定量分析相结合,实现了对防暴驱散车作战效能的评估。     

基于直觉模糊熵的飞行保障效能灰色聚类评估

随着空军在未来战争中越来越重要，飞行保障效能的好坏直接关系到空军战斗力的生成。通过分析飞行保障任务，构建了飞行保障效能评估指标体系，建立了基于直觉模糊熵的动态客观权重模型；运用灰色聚类评估方法对飞行保障效能进行了评估，并结合实例，验证了该方法的有效性，为保障能力的提升提供了参考依据。     

舰炮身管的模态分析与多目标优化

舰炮的炮口扰动是影响舰炮射击精度的重要因素。为了减少舰炮的炮口扰动,优化身管结构,建立了柔性身管的ABAQUS有限元模型,将有限元模型的模态计算值与模态试验值进行比较,发现建立的柔性身管有限元模型是合理可行的。提出了混沌量子粒子群算法与动力学联合优化的方法,进行身管和炮口的多目标优化。优化结果表明,优化后炮口中心的线速度、角速度和角位移与优化前相比显著减小,身管质量有所降低,结构更加合理,该优化方法有效可行,为下一步全炮总体优化设计提供了一定的借鉴。     

挠性接管隔振效果检测试验装置合理性的讨论

采用机电比拟的方法对挠性接管隔振效果检测试验装置进行了分析,针对欲达到的试验目的,定性地提出了组成试验装置的质量、弹性常数等应达到的要求.     

重离子碰撞中的量子饱和机制

分别利用胶子半经典饱和与量子饱和机制,研究了相对论重离子碰撞中净余质子产生截面的大横动量现象。通过贝塞尔函数多项式近似与辛普森求积法的结合应用,解决了对贝塞尔函数的二重高振荡积分问题。计算发现:量子饱和机制的计算结果能很好地解释布鲁克海文国家实验室的最新实验现象,从而证实了高能重离子碰撞中胶子量子饱和机制的存在。     

非致命微波武器综合效能评估

针对非致命微波武器效能评估问题,通过分析影响非致命微波武器效能的关键因素,建立了非致命微波武器评价指标体系,提出了非致命微波武器效能的评估方法。采用一致性排序法确定各个指标的分配权重,并将Vague集应用到效能评估中,利用加权贴近度表征非致命微波武器效能的评估值。得到评估结果与实际情况相符,为国内非致命微波武器发展提供了理论依据。