拓扑结构

The frame of 28 or 29 is formed by two-dimensional highly undulated simple layers of (6,3) topology that catenate in a parallel fashion to give, for the first time, a three-dimensional overall network, instead that a usual two-dimensional one.

首次将二维高度起伏的具有(6， 3)拓扑结构的简单层，通过一种平行方式相互铰链，广延成一种三维聚合网络结构。

In order to study magnetic topology in chromosphere and corona, extrapolation of magnetic field muxt be done.

要研究色球及日冕的磁场拓扑结构，必须对光球磁场进行理论外推。

The theoretical analysis and design details of these two active clamp PFC circuit are proposed.

本文给出了两种拓扑结构的理论分析和设计方法。

In addition, it's also very difficult to generate the closed surface fitting the outer nodes of the deformed material, the details includes locating the vertex, surface edge and loop.

本文提出基於畸变网格的质量优化和局部网格加密／稀释是最佳的解决方法，既可以保持初始网格的拓扑结构，还可以有效地避开网格再划分问题。

This thesis analyzes the background and research situation of the backlight home and abroad, and investigates the radiation principle, the driver topologies and resonant circuit of cold cathode fluorescent lamp.

本文分析了背光电源的研究背景、研究现状，研究了冷阴极荧光灯的发光原理、驱动电路的拓扑结构和谐振电路，并对冷阴极荧光灯建立了仿真模型，来优化设计冷阴极荧光灯的驱动电路。

First of all, the concept of network control system is introduced, and then the structure of some common control network, medium access and the application occasions are analyzed.

论文首先介绍了网络控制系统的概念，分析了几种常见的控制网络的拓扑结构、介质访问控制原理以及它们的适用场合。

The most common bus topology network is Ethernet.

最常见的总线拓扑结构的网络是以太网。

In this paper, their character of common topology and control method will be introduced. Finally, the Common-Mode Voltage being restrained and Power being balanced of cascaded inverter are researched.

本文详细介绍了目前级联多电平变换器常用拓扑结构、控制方法及它们的特点，最后就级联逆变器的功率平衡及共模电压抑制等问题进行了简要分析探讨。

As for the theory of network traffic state estimation, we study the basic network compartmentalization method and data fusion procedure with GIS technology.

在分析城市道路路网交通状态估计理论时，本文首先分析了城市交通路网的拓扑结构形式和功能层次，提出适合分布式运算的路网划分原则。

The high-voltage high-power multilevel converter and AC motors drive techniques are summarized compendiously for domestic and overseas studies in the prolegomenon of this dissertation. The evolution and research status of multilevel converter topologies are analyzed, the development of AC variable speed techniques and the characteristic of DTC are discussed, also, the aim and significance for the research are demonstrated. In this dissertation, SVPWM pattern and implement method have been addressed comprehensively for three-level NPC inverter.

本文绪论部分针对国内外高压大容量多电平变换技术和交流传动控制技术作了简要综述，着重分析了多电平拓扑结构的发展和研究现状，讨论了交流调速的发展和直接转矩控制技术的特点，指出本文选题的目的和意义。

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。