中大口径榴弹采用ICT检验注装药底隙方案研究

注装药底隙是常规榴弹的致命缺陷,现通常采用抽样检查。文中通过对缺陷的产生和目前国内外检验方案的分析入手,经可靠性计算,并结合我国工业实际,以提高验收可靠性的思路来设计,提出了新的动态调整型验收方案:在生产初期进行全数检验,当达到一定合格数量后,再实施抽样检验。该方案能在不提高检验成本的情况下降低军方的使用风险,提高ICT验收可靠度。     

添加某种化合物提高改性单基药性能(英)

<正>The modified single base propellant is generally prepared from single base propellant grains by impregnation with a blasting oil nitroglycerine(NG),following by deterring with a polyester(NA).In our recent research,the performances of the propellant were improved significantly through adding a special compound at the second step.Samples without and with the compound was denoted as IDC-1 and IDC-2,respectively.     

Simulation of the Crashing of Sandwich Structures under Impact Loads by Movable Cellular Automata

Movable cellular automata (MCA) method is applied in the analysis of dynamic characters of ceramic armor composite structures under impact loading. As a new approach, MCA is different from the traditional numerical methods such as the finite element method and boundary element method. Based on the theory of particle mechanics, MCA is applied as a powerful tool in relying specific structural analysis of materials loss and penetrating damages. In this paper the method is used to study responses of multi-layered ceramic plates as a base of armor structures under impact loading, thus assisting further investigations in the crashing process and to improve ceramic armor structures.     

基于RBF神经网络的SO2的预测

基于RBF神经网络的SO2的浓度预测,选取一定的历史数据建立径向基函数神经网络训练模型,进行拟合训练.将芜湖市1993年到2001年大气SO2的浓度历史数据用于径向基函数神经网络,建立训练网络模型,通过训练优化提高训练可靠性.再用该模型对芜湖市大气中SO2的浓度进行预测.     

电源系统故障造成基站断站问题的分析与处理

随着技术的发展,电源系统的免维护程度越来越高,但对日常维护工作的参数精度要求也更高了。在日常的运行中,若参数设置不当或缺乏管理,电源系统不能安全、稳定、可靠地运行,将直接影响通信网络的通信畅通,并影响高频开关电源和阀控式密封铅酸蓄电池的使用寿命。     

基于图数据库的IPTV内容知识库设计和实现

电信运营商IPTV业务平台拥有大量的节目内容信息,可以建立IPTV内容知识库。传统方式下使用关系数据库对知识进行格式转换和存储,在模型结构复杂性、查询直观性以及效率方面存在局限。利用图数据库技术,可以基于全新的图模型构建IPTV内容知识库。通过研究比较,提出了基于图数据库的IPTV内容知识库存储和查询的思路和实现方法,并利用某电信公司实际数据进行了场景验证。     

5G基站防雷接地措施

本文分析了雷击对移动基站的危害,介绍了5G基站的组网及防雷特点,分析了5G基站防雷接地技术要求,总结了5G基站防雷接地措施,对保障5G基站安全运行起到重要作用。     

A curvature calibrated bandgap reference with base-emitter current compensating in a 0.13μm CMOS process

In bandgap references,the effect caused by the input offset of the operational amplifier can be effectively reduced by the utilization of cascade bipolar junction transistors(BJTs).But in modern CMOS logic processes,due to the small value ofβ,the base-emitter path of BJTs has a significant streaming effect on the collector current,which leads to a large temperature drift for the reference voltage.To solve this problem,a base-emitter current compensating technique is proposed in a cascade BJT bandgap refe...     

无机房基站供电方案

本文介绍了无机房基站的配置场景,比较了无机房基站的供电方案,给出了推荐供电方案.     

电磁照射与人体健康

目前公众越来越关注电磁照射对自身健康的影响,特别是电磁照射致癌以及通信基站安全问题.本文将根据今年来国际组织(WHO、ICNIRP等)对于相关课题的研究,介绍相关的研究结果.