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.     

新型舵机结构运动分析与仿真

根据旋转弹弹道修正要求,提出一种基于4R空间机构的电动舵机结构,建立了理论分析模型,以空间机构学运动分析为基础,推导了机构输入、输出转角关系,绘制了理论分析转角曲线,建立机构三维模型,通过多刚体及刚柔耦合仿真验证分析了舵机转角关系和运动副受力情况,研究了该结构的可行性。计算分析结果表明,该舵机具有结构简单,动作可靠的优点,能满足舵机控制的转角精度和响应频率要求,适用于简易制导弹药。     

Neural network modeling to evaluate the dynamic flow stress of high strength armor steels under high strain rate compression

An artificial neural network (ANN) constitutive model is developed for high strength armor steel tempered at 500 °C, 600 °C and 650 °C based on high strain rate data generated from split Hopkinson pressure bar (SHPB) experiments. A new neural network configuration consisting of both training and validation is effectively employed to predict flow stress. Tempering temperature, strain rate and strain are considered as inputs, whereas flow stress is taken as output of the neural network. A comparative study on Johnson–Cook (J–C) model and neural network model is performed. It was observed that the developed neural network model could predict flow stress under various strain rates and tempering temperatures. The experimental stress–strain data obtained from high strain rate compression tests using SHPB, over a range of tempering temperatures (500–650 °C), strains (0.05–0.2) and strain rates (1000–5500/s) are employed to formulate J–C model to predict the high strain rate deformation behavior of high strength armor steels. The J-C model and the back-propagation ANN model were developed to predict the high strain rate deformation behavior of high strength armor steel and their predictability is evaluated in terms of correlation coefficient (R) and average absolute relative error (AARE). R and AARE for the J–C model are found to be 0.7461 and 27.624%, respectively, while R and AARE for the ANN model are 0.9995 and 2.58%, respectively. It was observed that the predictions by ANN model are in consistence with the experimental data for all tempering temperatures.     

指挥信息系统验证理论和验证方法

从验证的概念讨论出发,针对“指挥信息系统验证”,从概念和含义、产品和结果、目的和作用等多方面进行了详细解读,给出了较详细的验证方法和步骤,并就验证与测试的区别和关联进行了讨论,然后对广义概念上的“指挥信息系统验证”做了更深入的探讨,最后提出了验证应遵序的原则和注意事项。     

末端防御作战中火控雷达组网系统应用研究

火控雷达组网是应对未来末端防御作战挑战的有效途径。提出了基于指挥信息系统的火控雷达组网方式,并分析了该方式的优势。继而基于末端防御战斗部署一般要求和火控雷达组网系统对空侦察配系的特殊要求,经仿真计算得出和分析了火控雷达组网系统的典型对空侦察配系。最后详细论述了火控雷达组网系统的指挥控制要点。研究结果对于促进末端防御部队形成以信息系统为核心的体系作战能力具有重要意义。     

基于嵌入式Web的HART仪表远程控制系统

为解决有线HART仪表在恶劣环境中远程传输时易受影响、成本高等问题,结合嵌入式linux系统在远程工业控制中的应用,提出了一种基于嵌入式Web的HART仪表远程控制系统。采用S3C2440处理器和DM9000网络芯片,在嵌入式系统上移植Boa Web服务器,并运用CGI技术实现动态网页控制。利用该控制系统,客户只需在室内通过浏览器即可对HART仪表进行远程监控,且不需要专门的组态软件。     

基于效果的炮兵行动C2系统动力学建模与仿真

一体化联合作战参战军兵种多、指挥控制(C2)与协调复杂。围绕炮兵行动特点要求,运用系统动力学理论建立联合作战炮兵行动指挥控制的系统动力学模型,研究常规打击和基于效果作战两种指挥控制模式下炮兵行动所产生的不同结果及其原因,并给合作战想定仿真验证,得出较为可靠的结论,为解决联合作战炮兵行动精确指挥控制与协调提供一种有效途径     

GPS L1C信号LDPC译码器设计

GPS现代化中的L1C信号使用了LDPC码,以提高接收机的弱信号接收能力。L1C信号中使用的LDPC码没有循环或准循环结构,这为译码器设计带来了难度。为了降低译码器实现复杂度,在分析L1C信号LDPC码校验矩阵结构的基础上,通过对校验节点分类和改变变量节点更新方法,提出了一种低存储量和简化译码器控制逻辑的低复杂度译码器结构,并通过仿真验证了译码器译码结果的正确性。     

DoDAF的末段反导C2BM系统需求分析

末段反导指控与作战管理(Command,Control and Battle Manangement,C2BM)系统是末段反导系统的指挥控制中心.在系统分析末段反导系统的组成及末段反导C2BM系统工作过程的基础上,初步探讨了基于DoDAF(Department of Defense Architecture Framework)的末段反导C2BM系统需求分析方法和步骤,建立了末段反导C2BM系统的作战视图,对末段反导C2BM系统的体系结构及其信息交互进行了深入分析和可视化建模,保证了对末段反导C2BM系统需求理解的一致性,有效促进了军事人员与分析设计人员间的沟通和交流,为后续的开发夯实坚实的基础.     

双浮体波浪能转换装置中重心布置对波浪能吸收影响分析

提出一种基于横摇运动的双浮体波浪能转换装置,利用水面浮体与水下浮体之间的相对横摇运动实现对波浪能的吸收。在保持水下浮体稳定的前提下,水面浮体的横摇运动决定了整个装置对波浪能吸收情况。水面浮体的横摇运动受其横摇固有频率的影响,主要是重心布置。为了合理选择水面浮体的重心位置,采用数值分析的方法对箱型浮体在长峰不规则波下的工作情况进行分析,讨论重心布置对波浪能吸收的影响以及对PTO参数选择的影响。结果表明,重心的布置可改变波浪能吸收的频段,重心布置越低,可吸收的波浪能频段越广,越有利于波浪能的吸收。