基于CATIA的汽车前梁校核

本文介绍了CATIA的有限元分析功能在汽车前梁校核中的应用，避免了接口传递产生模型改变的问题，结果表明CATIA的有限元分析功能具有直观精确、应用简单等优点。     

铁路桥涵设计安全风险及防范的几个问题

分析了铁路桥涵设计中存在的安全风险因素，强调在桥涵设计中要加强基础资料与现场实际情况的符合性，重视桥涵与地下管线干扰问题，加强既有线施工防护。详细说明复杂结构设计边界条件、桥梁设置在陡坡起伏等复杂地形及滑坡体等不良地质区时，应加强基础设计安全，以及湿陷性黄土地区需加强排水设计等观点，并针对设计安全风险提出了具体防范措施。     

浅谈通信局（站）防雷与接地保护中的几个问题

通信局（站）防雷应采用综合防雷技术。就雷电浪涌保护器（SPD）的设置、用户电缆和光缆的防雷、接地线的压降等进行了探讨。     

YZ-1型空气制动系统的优化设计

分析YZ-1型制动系统在使用过程中出现的问题,通过对风源部分压力控制系统、主辅车转换开关(A阀)和制动机部分进行改造,使各部件形成集成化安装,对提升产品品质,降低用户维护成本作用显著.     

上海港现代物流发展水平评价研究

以上海港为研究对象,通过构建了上海港物流发展水平评价的指标体系,利用因子分析法和主成份分析法进行对比分析,研究结果表明上海港目前在港口物流量的规模和腹地经济实力方面具有绝对的优势,而在港口物流发展速度和高附加值的国际物流的发展方面却有很大的发展空间。     

STUDY ON NEIGHBORHOOD DISCOVERY PROTOCOL IN COMMUNICATION NETWORKS

IntroductionIt is well known thatthe PNNIsystem is a de-veloping system in the private ATM networkfield[1～ 5] .According to Ref.[6],PNNI includestwo categories of protocols,one defines for dis-tributing topology information between switchesand clusters of switches- routing protocol,and theother defines the signalling- signalling protocol,which is message flows used to establish point topoint and point to multi- point connections acrossthe ATM network.Forrealizing the PNNIroutingwith m…     

混凝土早期裂缝的原因分析及预防措施

简要介绍了混凝土早期裂缝的几种原因及裂缝产生的类别,并针对各类裂缝提出了有针对性的预防控制措施.     

一种PCI-485通讯卡固件的设计方案

设计了一款基于PCI总线的485通讯卡固件程序.其主要功能是对上位机的数据处理并下传给下位机;对下位机进行扫描,看有否数据上传,并将上传的数据传输给上位机.程序主要分五个模块:主程序模块、初始化模块、下发数据模块、上传数据模块和呼叫上传模块.该通信卡实现了上传下达的功能,避免了传输过程中的同步传输问题.     

Polyclonal antibody preparation and expression in liver tissues of transactivated protein 5 of hepatitis C virus nonstructural 5A

Objective To prepare polyclonal antibody of transactivated protein 5 of hepatitis C virus nonstructural 5A (NA5ATP5) and to explore its expression in the liver tissues. Methods In Escherichia coil BL21, the prokaryotic expression vector pET32a(+)-NS5ATP5 was induced by isopropyl-β-D-thiogalactoside (IPTG), and it was analyzed with sodium dodecyl sulfate-polyaerylamide gel electrophoresis (SDS-PAGE) and Western blotting. And the purified protein was used to immunize the rabbit to prepare polyelonai antibody, with which we studied the function of NSSATP5 by determining the different liver tissues with the streptavidin-perosidase (SP) immunohistochemistry method. Results Recombinant NS5ATP5 (molecular weight: 65 kD) and polyclonal antibody were successfully prepared. NS5ATP5 expression in the liver of patients with chronic HCV infection was much higher than that of a normal person, and it was detected mainly in the cytoplasm. Conclusion The findings of the expression difference between HCV patients and normal people led to a novel diagnostic marker to detect HCV infection.     

车联网中移动边缘计算的网络架构

从车联网(V2X)的不同应用角度,讨论在不同应用场景下的移动边缘计算(MEC)组网方式,为车联网(V2X)的业务实现提供技术支持。