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ABSTRACT Topology and routing optimization is the substratum of the optimization in communication networks.

拓扑结构和路由优化是通信网络优化的基础，其他的优化功能，如：流量控制、资源管理都是在拓扑结构和路由优化的基础上实现的。

This dissertation first introduces the hardware connection between the RS - 232 connection and the electric cable line in the numerical control workshop network communication, then it analyzes and compares syzygy type network topology and star topology based on serial port expansion card.

本文首先介绍了数控车间组网通讯中RS232C接口与电缆线的硬件连接，然后对点对点式网络拓扑结构和基于串口扩展卡的星型拓扑结构进行分析与比较，从而得出数控车间串行通信连接系统的最佳方案。

The theory of graphs and relations between the spectra and fixed variate (e.g. chromatic number, degree sequence, diameter and connectivity) of graphs by means of the well-developed theory and technique of algebra, topological structure properties of graph, combination and matrix theories so as to establish firm essential relation between the algebraic properties and topological properties of graphs and networks.

图谱理论的研究主要是利用成熟的代数理论和技巧，并结合图的拓扑结构性质和组合数学的理论、矩阵理论来研究图谱及其与图的结构性质、图的其它不变量(如色数，度序列，直径，连通度等)之间的关系，将图与网络的代数性质与图的拓扑性质紧密地联系在—起。

Thus other complex topological relationships can be deduced efficiently independent of geometry embedding.

本文深入讨论了基于这种拓扑结构的几种重要的拓扑查询的实现方法。

To find the failure propagation mechanism from the inherent topological structure of the complex electromechanical system, the topological structure statistical properties of the system were analyzed with small world net theory, and a failure propagation model based on the small world clustering was proposed.

为了从复杂机电系统自身固有的网络拓扑结构出发来研究故障的传播机制，采用小世界网络理论分析方法，对系统网络拓扑结构统计特性进行分析，建立了基于小世界聚类特性的故障传播模型。

Complex topological relationships exist among hydrological objects of urban drainage simulation models.

城市排水系统各要素间存在复杂的拓扑关系，通常构建城市排水系统模拟模型需要对排水系统要素之间的拓扑关系进行检查和修正。

Now, the topological relationships that have been defined cannot represent the topological relationships between the two complex spatial features arbitrarily composed of points, li...

当前，对拓扑关系集合的定义还不能描述那些由点、线或面等不同维几何对象构成的复杂空间对象之间的拓扑关系。

In order to do the geometric shape analysis for each feature of the turbine blade effectively, the density measurement data of the turbine blade with complex topological structures should be segmented into relatively simple sub datasets according to blade structure.

为了有效进行涡轮叶片各结构特征的几何尺寸分析，需要对涡轮叶片的测量数据进行分割，把具有复杂拓扑结构的空心涡轮叶片的测量数据分割成简单拓扑结构对应的测量数据子集。

Based on the topological dimension reduction method presented by B. Zhang et al for the problem of motion planning in the environment consisting of precisely known polygonal or polyhedral obstacles, we further discuss the problem of motion planning for a multi—joint robotic arm.

对由完全精确已知的多边形或多面体组成的障碍环境中的运动规划问题，在张钹等提出的拓扑降维法的基础上，本论文进一步探讨了应用拓扑法的多关节机械手的运动规划问题，其中重点解决了状态空间中连通块的划分问题和连通块之间连通性的判别问题。

However, few reports discuss the smooth Lorenz-like system with multi-wing attractors,and the attractors with both hyperchaotic dynamics and multi-wing topological structure are seldom reported. Based on the existing smooth hyperchaotic system,the common characteristics of these systems are analyzed.

构造超混沌系统在目前并非难事，在Chua系统基础上构造具有多涡卷拓扑结构的吸引子也有很多系统方法，但较少有文献讨论基于Lorenz系统族的拥有多翼结构吸引子的光滑混沌系统，而同时具备超混沌特性和多翼拓扑结构吸引子的光滑混沌系统则更少报道。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。