基于随机拟合的悬浮式深弹弹阵特征建模＊

通过分析悬浮式深弹发射后在空中的弹道特性,建立了深弹弹着点坐标的计算模型。采取蒙特卡洛方法,分别对舰艇六自由度状态下,单管和六联装火箭深弹的弹着点坐标进行了仿真计算,对弹着点的分布规律进行了研究,并得出弹着点的联合密度函数。结果表明,在发射参数存在正态扰动时,弹着点散布区域均呈椭圆形分布,弹着点坐标均仍服从正态分布。     

压剪加载下炸药装药中剪切带形成与发展模型

研究了在压剪加载下炸药这类粘塑性介质中剪切带的形成与发展。提出了一种反映炸药装药中剪切带形成和发展的计算方法,并分析了剪切带发展变化特性与炸药起爆的关系     

高速水射流倒空弹体装药安全性研究

本文阐述了高速水射流倒空弹体装药的机理,建立了确定水射流引爆炸药的临界速度的模拟实验方法和模型,进行了高速水射流冲击炸药的安全性试验,并对试验结果进行了分析,证明在工作泵压下高速水射流倒空弹体装药安全、可靠。     

利用火箭深弹系统拦截鱼雷的技术改进方法探析

多功能、多用途是火箭深弹系统的主要发展方向之一。根据水面舰艇武器装备的实际,仅从拦截潜艇发射的鱼雷角度出发,对舰载火箭深弹系统拦截来袭鱼雷的可行性进行了分析。在此基础上,探讨了利用火箭深弹系统拦截鱼雷的系统选择、深弹战斗部的开发、引信选型、发射管安装及配置、火控系统的改进等关键问题,并提出了一些具体的改进方法。     

高校干部档案材料收集工作存在的问题与对策

新时期高校干部档案工作应更好地为学校各级领导决策服务,为教学、科研、管理的各项工作服务。文章从高校干部档案的收集工作入手,对高校干部档案收集工作中存在的问题进行分析,并提出解决问题的对策。     

电荷泵中单粒子瞬变的研究

为分析电荷泵中不同频率单粒子瞬变(SET)电流对锁相环(PLL)的影响,采用频域分析法从增益和带宽的角度研究了环路参数与SET响应的关系。分析结果表明,减小环路滤波电阻可以降低系统增益,从而有效降低压控振荡器控制电压的扰动;增大固有频率或阻尼因子则可以提高系统带宽,从而滤除更大范围的SET电流,同时还可以降低PLL恢复到锁定状态的时间。因此,减小环路滤波电阻、增大固有频率或阻尼因子是有效的设计加固方法。通过1GHz PLL的SET模拟验证了上述结论。     

A study on the surface overpressure distribution and formation of a double curvature liner under a two-point initiation

The formation mechanism of an EFP(explosively formed projectile) using a double curvature liner under the overpressure effect generated by a regular oblique reflection was investigated in this paper.Based on the detonation wave propagation theory,the change of the incident angle of the detonation wave collision at different positions and the distribution area of the overpressure on the surface of the liner were calculated.Three-dimensional numerical simulations of the formation process of the EFP with tail as well as the ability to penetrate 45# steel were performed using LS-DYNA software,and the EFP ve-locity,the penetration ability,and the forming were assessed via experiments and x-ray photographs.The experimental results coincides with those of the simulations.Results indicate that the collision of the detonation wave was controlled to be a regular oblique reflection acting on the liner by setting the di-mensions of the unit charge and maintaining the pressure at the collision point region at more than 2.4 times the CJ detonation when the incident angle approached the critical angle.The distance from the liner midline to the boundary of the area within which the pressure ratio of the regular oblique reflection pressure to the CJ detonation pressure was greater than 2.5,2,and 1.5was approximately 0.66 mm,1.32 mm,and 3.3 mm,respectively.It is noted that pressure gradient caused the liner to turn inside out in the middle to form the head of the EFP and close the two tails of the EFP at approximately 120μs.The penetration depth of the EFP into a 45# steel target exceeded 30 mm,and there was radial expansion between the head and tail of the EFE increasing the penetration resistance of the EFP.Therefore,the structural size of the unit charge and the liner can be further optimized to reduce resistance to increase the penetration ability of the EFP.     

【专题】面向精打产品的红外图像数据采集、治理和应用

面对复杂严酷的战场环境,红外成像精打产品的智能化水平和抗干扰能力是产品生存的重要因素,而图像大数据技术是红外成像精打产品提升技术能力的重要保障。本文结合红外成像精打产品智能化能力提升的需求,提出了面向精打产品的图像数据获取、历史数据及新增数据治理、数据挖掘应用的全过程实用方法,实现了特定目标红外图像数据增补及海量图像数据的高效管理与智能应用;并在图像大数据的支持下,研发了智能信息处理算法性能评价平台和目标检测算法,有效提升了精打产品的智能化水平和实际应用能力。开展基于实际应用需求的图像数据采集、治理和应用技术研究是提升精打产品性能的重要途径,也能够为智能信息处理技术在精打产品上的落地应用提供有力支撑。     

Strategic intelligence during coin detention operations – relational data and understanding latent terror networks

One aspect of the global “War on Terror” that has received limited coverage in the academic literature is the problem of detained persons as it relates to intelligence. This is a surprising oversight, given the number of detainees that the USA has been responsible for (over 25,000 were in custody in Iraq alone at one time during its peak). The detention environment offers a prime strategic intelligence opportunity for the US intelligence community to study the tactics and organizations of individuals who have been removed from the overall conflict. In this article an easily implemented collection program is recommended to be deployed in US/coalition detention centers. The primary recommendation is to gather relational data on detainee communication, both authorized and illicit, and to use these data to perform network analyses of terrorist groups and their individual members.     

基于随机拟合的悬浮式深弹弹阵特征建模

通过分析悬浮式深弹发射后在空中的弹道特性,建立了深弹弹着点坐标的计算模型。采取蒙特卡洛方法,分别对舰艇六自由度状态下,单管和六联装火箭深弹的弹着点坐标进行了仿真计算,对弹着点的分布规律进行了研究,并得出弹着点的联合密度函数。结果表明,在发射参数存在正态扰动下,弹着点散布区域均呈椭圆形分布,弹着点坐标均仍服从正态分布。