DMMP气溶胶的分析方法研究

实验研究了DMMP气溶胶的色质分析方法,确定了其色谱分离条件和质谱分析条件。并采用炭管法、碳氢总量分析方法进行了对比分析,获得了很好的一致性结果．解决了滤毒罐防沙林的DMMP模拟剂检验方法。     

A combination of Lagrangian relaxation and column generation for order batching in steelmaking and continuous‐casting production

This article considers the order batching problem in steelmaking and continuous‐casting production. The problem is to jointly specify the slabs needed to satisfy each customer order and group all the slabs of different customer orders into production batches. A novel mixed integer programming model is formulated for the problem. Through relaxing the order assignment constraints, a Lagrangian relaxation model is then obtained. By exploiting the relationship between Lagrangian relaxation and column generation, we develop a combined algorithm that contains nested double loops. At the inner loop, the subgradient method is applied for approximating the Lagrangian dual problem and pricing out columns of the master problem corresponding to the linear dual form of the Lagrangian dual problem. At the outer loop, column generation is employed to solve the master problem exactly and adjust Lagrangian multipliers. Computational experiments are carried out using real data collected from a large steel company, as well as on large‐scaled problem instances randomly generated. The results demonstrate that the combined algorithm can obtain tighter lower bound and higher quality solution within an acceptable computation time as compared to the conventional Lagrangian relaxation algorithm. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

Thermal and combustion behavior of Al-MnO2 nanothermite with poly(vinylidene fluoride -co- hexafluoropropylene) energetic binder

Fluoropolymers get increasing attention in energetic materials application due to the high fluorine content. To explore the effect of poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) on Al/MnO2 nanothermite, the samples with different contents are prepared and characterized by SEM, TG-DSC, XRD, and their ignition and combustion behavior are tested and recorded. The results show that P(VDF-HFP) as an energetic binder can combine the nanothermite components together, even exist in the gaps. The integrity of energetic materials has been improved. Thermal analysis shows that the addition of P(VDF-HFP) greatly changes the thermal reaction processes, and the exothermic peaks appear early, but the utilization of fuel and oxidizer is not efficient from the XRD results. Furthermore, the appropriate addition of P(VDF-HFP) can directly reduce the ignition energy threshold and increase the combustion time, which is necessary for the potential ignition charge application. The possible reasons for above phenomena are discussed and analyzed. This research provides a reference for improvement of thermite-based ignition charge formulation.     

密封包装弹药内部湿度变化规律测试研究

密封包袋内部湿度是影响弹药质量变化的主要因素。本文通过测定不同温度和湿度环境条件下包装内部湿度变化情况,分析确认了影响密封包装内部相对湿度变化的主要因素是包装材料的透湿性。     

EMS型磁浮列车悬浮控制系统对爬坡能力的约束分析

分析EMS型磁浮列车的悬浮控制系统对爬坡能力的约束。首先基于系统开环传递函数和通用的悬浮控制器模型,通过将其单实极点配置为闭环非主导极点,将爬坡能力与控制系统的频带和阻尼等参数对应起来;然后以圆曲线型缓和曲线为例,分析得出坡道段的最大跟踪误差与行车速度的关系;最后结合允许误差,给出最小竖曲线与最大爬坡速度半径的关系。研究结果对实际工程具有一定的指导意义。     

门锁及车门保持件的全球技术法规研究

介绍了GTR 1《关于门锁和车门保持件的全球技术法规》制定的基本情况,对比分析了GTR 1与GB 15086-2006《汽车门锁及车门保持件的性能要求和试验方法》的主要差异。     

中国工农红军主力改编为八路军的谈判斗争

20世纪30年代,日本不断扩大对中国的侵略,中华民族面临生死存亡的严重危机.在大敌当前的形势下,国共两党放下政见分歧和意识形态的羁绊,先后就两党合作抗战问题进行了5次谈判.取得重大进展.但在红军改编的一些焦点问题上,双方进行了激烈的较量.在谈判中,中国共产党坚持独立自主的原则,将原则的坚定性和策略的灵活性结合起来,进退有据,措置裕如,顺利实现了红军的改编.红军改编的谈判,是军事谈判的一个成功范例,为新时期人民解放军加强自身建设和遂行多样化军事任务提供了宝贵的借鉴.     

美军无人地面车辆概述（一）

对美国陆军无人地面车辆（又称军用机器人）进行概要介绍,编译的原文为截止到2007年底的美国政府公开发布资料,分为引言、轻型无人地面车辆、中型无人地面车辆、重型无人地面车辆、大型无人地面车辆等5章,包括20多种研制和投入使用的型号,本文为第一部分。     

推动标准建设促进科技创新——某科研产品研制中的标准化工作实例

1．引言 某科研产品是我国自行设计研发的一种新型军工产品。通过该科研产品研制项目的实施,辽宁庆阳特种化工有限公司（以下简称庆化公司）完成了该科研产品的配方实验和批量生产,为军方提供了优质产品,满足了军方需求,并成为国内该系列军工产品的研制和生产基地。     

北斗静止轨道卫星信号盲区快速并行解算方法

北斗系统静止轨道卫星信号盲区解算方法复杂,串行计算耗费时间长,须在并行环境下利用更多的计算资源进行北斗盲区的快速解算。在分析北斗盲区解算原理与算法并行特征基础上,提出动态盲区影响域的并行解算方法。以栅格单元为并行粒度进行任务划分,实现了北斗盲区的高效并行解算。运用全国范围59景数字高程模型数据,利用8进程进行盲区并行解算,耗费时间约为5小时。实验测试结果表明:算法的并行效率随着进程数的增加有所衰减,但稳定在96%以上。其程序中间件已集成应用于高性能地理信息平台,应用效果良好。