装备交互式维修支持系统在基层级维修中的应用研究

阐述了装备交互式维修支持系统的原理和创作过程,以及在基层级维修工作中的应用,研究成果可近一步提高基层级装备维修保障能力。     

基于探测时间的飞机作战生存力

考虑雷达在某一探测时间的扫描次数以及飞机被发现后将遭受的打击次数,提出了基于探测时间的飞机作战生存力模型.根据该模型,可计算出飞机在雷达探测范围内某一探测时间的飞机生存概率,并可绘制出飞机生存概率随探测时间变化的曲线,最后以算例分析了飞机生存概率随探测时间的变化关系.     

一种火控系统故障诊断专家系统

针对故障诊断领域的特点 ,建立了一个用于火控系统故障诊断的专家系统。论述了该系统的知识表示、推理机制和体系结构。实现了将故障监测硬件技术和专家系统软件技术有机结合 ,构造了集硬件、软件为一体的火控系统故障诊断专家系统。     

地铁火灾现场消防应急通信系统探析

以火灾现场原有通信系统被损毁的不同程度作为划分标准,分析灾害发生后,原有通信线路可以正常使用,原有通信线路部分中断,以及原有线路全部无法使用为设想情况,对现场应急通信组网进行设计分析。为今后更多的实际工作作参考和科学研究方向。     

现代花园洋房设计方法

花园洋房是具有悠久历史的住宅产品,现代花园洋房日益受到喜爱。为适应现代居住舒适、经济、安全的要求,寻求更加适合现代社会居住的花园洋房设计方法,基于花园洋房发展趋势与设计思想分析,结合具体设计方案,着重探讨套型叠加、空间过渡、下沉空间和洋房电梯等设计方法,从而为现代花园洋房设计方法的优化提供借鉴。     

Numerical investigation of the shockwave overpressure fields of multi-sources FAE explosions

Shockwaves from fuel-air explosive (FAE) cloud explosions may cause significant casualties. The ground overpressure field is usually used to evaluate the damage range of explosion shockwaves. In this paper, a finite element model of multi-sources FAE explosion is established to simulate the process of multiple shockwaves propagation and interaction. The model is verified with the experimental data of a fourfold-source FAE explosion, with the total fuel mass of 340 kg. Simulation results show that the overpressure fields of multi-sources FAE explosions are different from that of the single-source. In the case of multi-sources, the overpressure fields are influenced significantly by source scattering distance and source number. Subsequently, damage ranges of overpressure under three different levels are calculated. Within a suitable source scattering distance, the damage range of multi-sources situation is greater than that of the single-source, under the same amount of total fuel mass. This research provides a basis for personnel shockwave protection from multi-sources FAE explosion.     

Effects of total pressures and equivalence ratios on kerosene/air rotating detonation engines using a paralleling CE/SE method

In this paper, the kerosene/air rotating detonation engines(RDE) are numerically investigated, and the emphasis is laid on the effects of total pressures and equivalence ratios on the operation characteristics of RDE including the initiation, instabilities, and propulsive performance. A hybrid MPI + OpenMP parallel computing model is applied and it is proved to be able to obtain a more effective parallel performance on high performance computing(HPC) systems. A series of cases with the total pressure of 1 MPa, 1.5 MPa, 2 MPa, and the equivalence ratio of 0.9, 1, 1.4 are simulated. On one hand, the total pressure shows a significant impact on the instabilities of rotating detonation waves. The instability phenomenon is observed in cases with low total pressure (1 MPa) and weakened with the increase of the total pressure. The total pressure has a small impact on the detonation wave velocity and the specific impulse. On the other hand, the equivalence ratio shows a negligible influence on the instabilities, while it affects the ignition process and accounts for the detonation velocity deficit. It is more difficult to initiate rotating detonation waves directly in the lean fuel operation condition. Little difference was observed in the thrust with different equivalence ratios of 0.9, 1, and 1.4. The highest specific impulse was obtained in the lean fuel cases, which is around 2700 s. The findings could provide insights into the understanding of the operation characteristics of kerosene/air RDE.     

侦查假设在火灾调查中的应用

侦查假设是火灾调查实践中的一种行之有效的思维方式,火调人员在运用侦查假设的过程中应遵守其逻辑规则,并注意在日常工作中加强侦查假设逻辑思维的培养。     

对消防监督检查员专业资格标准的思考

随着国家法制化进程的不断深入,对从事消防监督检查的技术人员提出了越来越高的素质要求。为此,《消防监督检查员专业资格标准》征求意见稿应运而生。但“标准”的要求与消防部队的现实状况之间存在差距,解决好“标准”中的岗位等级与现行职称的衔接问题、“标准”规定的执业范围与基层人少事多的问题、“标准”规定的监督检查员申报岗位资格学历条件与现实状况之间的问题,有利于“标准”的执行。     

故障诊断效率与评估

叙述了电子设备故障诊断系统所进行检测的不同安排顺序对故障诊断效率的影响.提出了适当的检测顺序与检测方式,提高检查效率,缩短检查过程.还分析了每次进行故障诊断结果确诊或误诊随机现象,评判诊断准确率是抽样检验问题.引入假设检验方法,对设备故障诊断系统的准确率进行评判.对建造设备故障诊断系统有参考价值.