Research on fuze microswitch based on corona discharge effect

Abnormal voltages such as electrostatic, constant current, and strong electromagnetic signals can erro-neously trigger operation of MEMS pyrotechnics and control systems in a fuze, which may result in casualties. This study designs a solid-state micro-scale switch by combining the corona gas discharge theory of asymmetric electric fields and Peek's Law. The MEMS switch can be transferred from "off" to"on" through the gas breakdown between the corona electrodes. In the model, one of the two electrodes is spherical and the other flat, so a non-uniform electric field is formed around the electrodes. The theoretical work is as follows. First, the relation among the radius of curvature of the spherical electrode, the discharge gap, and the air breakdown voltage is obtained; to meet the low voltage (30-60 V) required to drive the MEMS switch, the radius of curvature of the spherical electrode needs to be 10-50 μm and the discharge gap between the two electrodes needs to be 9-11 μm. Second, the optimal ratio ε is introduced to parameterize the model. Finally, the corona discharge structural parameters are determined by comparing the theoretical and electric field simulation results. The switch is then fabricated via MEMS processing. A hardware test platform is built and the performing chip tested. It is found that when the electrode gap is 9 μm, the electrostatic voltage is at least 37.3 V, with an error of 2.6% between the actual and theoretical air breakdown voltages. When the electrode gap is 11 μm, the electrostatic voltage is at least 42.3 V, with an error of 10.5% between the actual and theoretical air breakdown voltages. Both cases meet the design requirements.     

Numerical and experimental study on the response characteristics of warhead in the fast cook-off process

The response characteristics of the warhead under thermal stimuli conditions are important to the safety improvement. The goal of this study is to obtain data on the warhead in the fast cook-off process. In this paper, a numerical calculation method is proposed, whose reliability is supported by comparison with experimental results. Through the numerical calculation, the temperature distribution, temperature change, and ignition time are acquired. The numerical results show that the ignition time is 76 s after the warhead started to burn and that the maximum temperature of the explosive's outer surface is 238.3 C at the ignition time. The fast cook-off experiment of the warhead is implemented so as to get the flame temperature and reaction grades that are not available through numerical calculation. The experimental results show that the overpressure fails to reach the preset minimum value which is equivalent to 6 kg of TNT and that the reaction grade is deflagration. The research results have reference value for the design of the warhead and the reduction of detonation risks.     

毛泽东运动战的情报信息思想研究

毛泽东的运动战具有以现代信息技术为核心的多样式信息来源,其效率之高和效应之大不仅是中国战史的奇迹,也堪称世界战史的典范。毛泽东当时自觉不自觉地站在了用情报信息指导战争这一世界军事领域的前沿,在战争中学习战争,成功地利用情报信息对红军的作战样式进行了全新的革命,发明和发展了当年红军以类似今天的制信息权为特征的运动战,名副其实地成为中国战史上使作战样式与现代无线电信息技术结合最早也最为出色的战略战术的创始人,当然也就赢得了战争。     

基于专家系统的防化保障预案评估研究

人工智能技术在众多领域获得广泛应用．为满足现代战争对防化指挥手段的现代化要求,针对不易量化的防化指挥决策问题的评估,提出了构建知识库并应用模糊推理机制建立专家系统,据此进行防化保障预案的评估选优方法,并对该方法的求解过程进行了探讨．     

论毕淑敏作品中的母爱

以学术界已取得的研究成果为基础,从对毕淑敏的文学创作活动及其作品文本的解读分析出发,运用马克思主义的美学理论及其方法,集中探讨并以毕淑敏文学创作中的母爱思考为中心,进行审美批评及美学评判,以发现并把握毕淑敏文学创作及其作品的叙事特征与艺术个性,以及注重生命体验及表现的文学成就和文学史研究价值。     

Inventory sharing under decentralized preventive transshipments

We consider preventive transshipments between two stores in a decentralized system with two demand subperiods. Replenishment orders are made before the first subperiod, and the stores may make transshipments to one another between the subperiods. We prove that the transshipment decision has a dominant strategy, called a control‐band conserving transfer policy, under which each store chooses a quantity to transship in or out that will keep its second‐subperiod starting inventory level within a range called a control band. We prove that the optimal replenishment policy is a threshold policy in which the threshold depends on the capacity level at the other store. Finally, we prove that there does not exist a transfer price that coordinates the decentralized supply chain. Our research also explains many of the differences between preventive and emergency transshipments, including differences in the optimal transfer policies and the existence or nonexistence of transfer prices that coordinate the system. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

基于模型参考的SINS/GPS制导炸弹俯仰偏航控制

由于SINS/GPS制导炸弹俯仰偏航要进行大空域的机动飞行,导致了其作为被控对象的状态方程参数变化剧烈,就要求飞控系统具有更强的适应能力和鲁棒性.因此.设计了基于模型参考变结构控制方法的鲁棒自动驾驶仪,具有良好的瞬态性能和抗参数大范围变化能力强等优点.以某型SlNS/GPS制导炸弹为例.选取典型的气动恶劣条件,进行了按给定制导指令飞行的六自由度全弹道飞行控制仿真,仿真结果表明,该自动驾驶仪能对制导炸弹实现鲁棒自适应控制,为飞控系统设计提供了重要参考.     

自反Banach空间一类完全广义集值强非线性混合似变分不等式问题

研究了一类完全广义集值强非线性混合似变分不等式在自反Banach空间下的问题,借助一个极大极小不等式,证明了这类完全广义集值强非线性混合似变分不等式的解的存在唯一性定理。     

军用光电产品元器件质量控制新思路的探讨

本文从元器件实际应用的角度,阐述了元器件质量控制的发展和现状,以可靠性理论为基础,结合元器件筛选工作中质量信息的分析,借鉴国外的经验,提出元器件质量控制的新思路。     

江泽民现代化思想刍议

江泽民现代化思想是在新的历史条件下对邓小平现代化思想的继承、丰富和发展。本文从思想动力、发展道路、目标内涵、实现方式和根本保证五个方面来论述江泽民的现代化思想。