网络拓扑结构

It is fitted to the intelligence interface and numerical value calculation. Through topology form and topology analysis as well as the graphical knowledge and the general network system equipment state analysis the graphic knowledge can be translated into inferable knowledge.

通过对可视化的电力系统结构图进行拓扑形成、拓扑分析及系统设备状态分析完成图形知识到计算推理所用知识的转化，从而得到既适合数值计算又适合智能推理的通用网络模型。

We present a SNMP-based topology discovery algorithm using direct connection theorem and simple connection theorem for judging relationship of switches in subnets. In order to in discover the map of network without SNMP, several key problems such as subnet guessing and multi-address routers are discussed in details. And then a topology discovery algorithm based on primitive protocols is presented. We also deeply study some routing protocols such as OSPF and BGP and propose a routing-protocols-based algorithm for topology discovery.

基于判断交换机互联的直接连接定理和间接连接定理，提出了一种完整的基于SNMP的拓扑发现算法；详细讨论了子网获取、多址路由器处理等关键问题，针对不同的网络环境给出了相应的解决方案，并以此为基础提出了一种基于通用协议的拓扑发现算法；在对OSPF，BGP等网络路由协议进行分析的基础上给出了一种基于路由协议的拓扑发现算法，并设计了一个自上而下的拓扑发现框架结构。

We study the recursive structure of the twisted-cube connected network sufficiently, and prove that the twisted-cube connected network is an n regular graph with connectivity n: point out that the twisted-cube connected network is a cube-free network, which is an essential distinction with the hypercube and other variations of the hypercube; prove that the diameter of n dimensional twisted-cube connected network is [ (n+1)/2] , which is almost the half of hypercube's.

首先对其结构的递归性进行充分地研究，证明它是连通度为n的n正则图；指出扭立方体连接网络无立方体子图，这是扭立方体连接网络与超立方体及其其它变种的本质差别；证明了n维扭立方体连接网络的直径为[（n+1）/2]，它几乎是超立方体直径的一半；最后，给出超立方体及其变种的等价定义，并对它们的结构递归性、网络参数和拓扑性质等作了简单的分析、综合和比较。

It is proved that DLCPG not only has good extensibility, short diameter and simple topology, but also has the following good characteristics for the networks with 10k nodes: The diameter of DLCPG is shorter than that of 2-dimensional Torus and RP networks, and the grouping ability of DLCPG overmatches that of 2-dimensional Torus and RP networks at the same time.

证明了DLCPG不但具有良好的可扩展性、短的网络直径和简单的拓扑结构等特性，而且对于10k个节点组成的互联网络，DLCPG还具有比二维Torus以及RP互联网络更小的直径和更优越的可分组性。

In order to solve the accumulation of synchronization error over hop distance in large scale wireless sensor networks, A new time synchronization algorithm has been proposed based on two-layer topology.

为了解决大规模无线传感器网络中同步误差随跳距的累积问题，提出一种基于二层拓扑结构的时间同步算法。

Finally,a star topology resembles a wheel with the net work itself corresponding to a central hub,and the links to individual computers corresponding to spokes.

最后，星型拓扑结构类似轮辐线，由网络的中心集线器连接轮辐线上的各个计算机。

Conventional firewall, which belongs to perimeter firewall, is subject to single-entry point and a performance bottle-neck. Furthermore, it relies on the notions of topology to implement the security policy.

传统的边界防火晹s在单点失效和性能瓶颈的局限性，而且依赖于网络的拓扑结构实施其安全策略。

Local area networks have many different topologies,or ways in which computers can be connected to the network.

局域网有多种不同的拓扑结构，或者说有多种计算机与网络的连接方式。

Communication networks can be classified in term of their physical arrangement or Topologies .

通讯网络可以被分类用他们的物理安排或拓扑结构的期限。

The topologies of these networks are investigated and the learning rules are analyzed.

详细分析了非线性自适应神经网络的拓扑结构、学习规则和调整算法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。