In pcs , multiple equipments connect to a shared bus through multiple nodes , which makes it possible for node - to - node communication , resource sharing , and less line connection . in order to realize a low cost , large - scale remote dcs , a hybrid - bus data collection system is designed with the fusion of fieldbus and one - wire techniques 在现场总线控制网络中，系统的各种设备通过多个节点连接到一根公共总线上，使得各个节点之间可以实现点对点的对等通讯和系统中信息资源的共享，同时大大减少系统中的连接线。
The two kinds of joint connection half - rigidity characteristic about gabled frames are discussed . the criterion among rigid connection , zero rigidity connection , half rigidity connection is determined ; the joint ' s moment and rotation angle curve is analyzed ; the calculation method about joint initial rigidity is brought forward ; the ultimate moment ' s calculation formula is deduced ; the result calculated by the formulas is compared to one calculated by the norm ' s formulas 探讨了门式刚架两种端板节点连接的半刚性特性，确定了节点刚接、铰接和半刚接划分的标准；分析了节点受力时的弯矩转角曲线关系；提出了节点的初始刚度的计算方法；提出了节点极限弯矩的计算公式，并与规范关于节点抗弯承载力计算的结果进行了比较。
But , there are still some valuable researchable problems , one of which is all former quorum system are the quorum system based on reliable point connection , which suppose that the connection among points is reliable . however , in the real application the connection is always unreliable 但是quorum系统还有很多值得研究的问题，其中一个问题就是以前quorum系统都是“面向可靠节点连接” quorum系统，即假定节点之间连接是可靠的，而在实际应用中往往节点之间的连接是非可靠的。
In order to avoid similar damage in future , investigation of some further new and finer joint types of the beam - column connections , analyses of the damage mechanism of new joints types under cyclical load and advance of new aseismatic design measure are not only significant from the theoretical aspect , but also important in practice 为了避免人员伤亡和财产损失，研究新的、性能优良的节点连接方式，找出新型节点在循环荷载作用下的破坏机理，提出新的节点构造和抗震设计对策，不仅具有重要的理论意义，同时也具有重大的工程意义。
