The network is liable to be attacked by the hacker and virus because of the fluidness of information , the distribution of resource , the opening of connection and diversity of connection forms . so the security problem is become more and more serious 由于计算机网络具有信息的流动性，资源的分布性，连接的开放性和连接形式的多样性等特征，致使网络易受到黑客和病毒的攻击，因此计算机网络的安全问题变得越来越突出。
So the experimental studies on beam - to - column connections in steel frame are very important and meaningful , because it can provide theoretic foundation and reference for practical projects in selecting the beam - to - column connections forms structural residence system in steel - frame 因此，钢框架梁柱连接试验研究既可给钢结构住宅体系提供选择梁柱连接形式的理论依据，又可供实际工程参考，具有重要的理论价值和实际意义。
The connection of steel structures is an important part for the steel structural member . the types of connections which are commonly used in practical engineering , such as welding , bolting , high - strength bolting and mixed connections are discussed in this paper 钢结构连接是钢结构构件的重要组成部分，本文结合工程实践，着重对钢结构中广泛应用的连接形式，如焊接连接、普通螺栓连接、高强度螺栓连接和混合连接等进行了叙述。
The paper introduced structure character of the soft rapid joint in piping , and compared with the flange connection , proved that it has the character of high connection performance , good seal feature and economic performance , it has been proved with certain applicable value 摘要介绍了柔性快速管接头的结构特点，并与法兰连接形式相比较，结果证明，柔性快速管接头具有良好的连接性能，密封性能以及经济性能等，具有一定的应用价值。
Wide plus k series universal pressure transmitters have multi - models , multi - measuring ranges , many kinds of processes connection form and material , they can widely used in petroleum , chemical industry , power , metallurgy , pharmacy and food and so on many industries field and may also adapt to various fields and medium in the industries Wideplus - k系列通用压力变送器具有多型号多量程,多种过程连接形式及材料。可广泛用于石油化工电力冶金制药食品等许多工业领域,可适应工业各种场合及介质，是传统压力表及传统压力变送器的理想升级换代产品,是工业自动化领域理想的压力测量仪表
Then an thorough computer modeling using finite element program with material , geometry and state triple - nonlinear taken into account is carried out on a series of influencing factors , such as comparison with npn - beam splice connection , comparison of varies designed theories , and the varying of fraction coefficient , diameter , grade , pretension and arrangement of bolts , thickness of web and flanges of beam and column , splicing location , axial loading on column , etc . lots of useful conclusions are drawn form computer modelling . finally , design and construction suggestions are given out . this study fills the black in the field of steel beam - to - column connection with cantilever beam high - strength bolted - splicing at both home and abroad 然后，本文在考虑材料、几何和状态三重非线性的基础上，对该连接形式进行了全面的计算机模拟，主要考虑了带悬臂梁段全螺栓拼接的梁柱连接节点与无拼接的梁柱连接及翼缘对接焊接腹板拼接的连接节点的对比，各种设计方法之间的对比，以及翼缘拼接和腹板拼接的螺栓间距、直径和数量，拼接点与梁端之间的距离，梁和柱的翼缘、腹板厚度，柱的轴力，接触面的摩擦系数，翼缘和腹板拼接板的厚度等因素的影响。
On the field construction of storage tank , the hoisting structure of electric block , by means of mechanics analysis and computation , can determine the amount which the electric block requires , the size of its side column and central column and its connecting forms , thus eventually reasonably allocating construction tools and decreasing the consumption of assistant materials only when the construction security is guaranteed 摘要储罐现场施工中，电动葫芦提升结构可通过力学分析、计算，确定所需电动葫芦的数目、提升组合结构中边柱和中心柱的规格尺寸及其连接形式，达到在保障施工安全的前提下合理配置施工机具、减少辅助材料消耗的目的。
Q41f - 10c catena pad fluorine valve , q41f - 10cf catena pad fluorine valve , j41f - 16 pad fluorine end - valve , j44f - 16 angle form pad fluorine end - valve , sj41f - 10c pad fluorine inspect - lens , the connect form is flange , the passing parts of valve - body lumen and valve - cover valve - core etc . are all metal pad fluorine plastic inside , rotproof excellently Q41f - 10c系列衬氟球阀， q41f - 10cf系列衬氟放料阀， j41f - 16系列衬氟截止阀， j44f - 16系列衬氟角式截止阀， sj41f - 10c衬氟视镜，连接形式为法兰式，阀体内腔及阀盖阀芯等过流部件均为金属内衬氟塑料，耐腐蚀性能优异。
Especially focusing on the action from the lateral force , it discusses the influence from the different connection between the main structure and the sub - structure , discussing the variation trend between the whole part and the local part at the same time , which is caused by the different section design parameters 尤其针对侧向力作用，探讨了主、次框架间不同连接形式对抗侧性能的影响，并对主要构件截面设计参数发生改变后，结构整体和局部受力性态的变化趋势做了深入研究。
Firstly , the dissertation discuss that the development city of has a deep bearing on pcee , founded on the relationship of pcee s formation and the shape of city . the suitable layout under some certain conditions of highway and city is recommended in accordance with the impact of highway on bourgeon of city ; quoting the theory of spider network construction , the dissertation demonstrated the optimized number of city entrance and exit fit for the formation and scale of city ; the obtained conclusions are confirmed by three related samples of eastern city 第一部分从出入口道路与城市形态相关性入手，论述出入口道路与城市发展关系；通过公路对城市发展影响的分析，提出公路与城市合理的连接形式及适宜条件；利用蛛网结构理论，得出适合大城市规模和形态的最优出入口数量；以东部三个大城市为实例，论证上述相关问题。
