Based on the review and present tendency analysis for small signal stability research , in this thesis , the reduced - order analysis method for small signal stability of multi - machine power system using detail model is researched 本文在回顾分析电力系统小扰动稳定研究的发展历程及其研究现状的基础上，开展了基于详细模型的多机电力系统小扰动稳定降阶分析方法的研究工作。
Based on the exact equivalence second - order model of multi - machine using detail model of generator , an electromechanical calculation method is put forward . this method connects the fuzzy block - decoupling method and the selective modal analysis method 本文利用基于发电机详细描述的多机系统精确等效二阶模型，提出了模糊分块解耦法与选择模式分析法相结合的机电模式计算方法。
The triangular model simplification technology are introduced systematically and comprehensively . the level of detail model technology is studied deeply . some typical existing level of detail model simplification algorithm are analyzed and compared 主要内容包括: 1 、对三角网格模型简化技术作了较为全面、系统的介绍,并重点研究了细节层次模型技术,对目前已有的几种典型的细节层次模型简化算法进行了分析和比较。
One characteristic of the paper is that the idea of information system modeling is used throughout the waveform development : first in the requirement analysis phase , the usecase diagram is used to model the logical system ; and then in the design phase , the detail model of the waveform is formed by combining the ofdm and the sca specification ; finally in the implementation phase , with language mapping mechanism , the platform independent system is translated into specific platform and language dependent program frame , and thus the ofdm waveform is formed under the windows / vxworks system . the implement process has demonstrated the reusability and transplantation of sca design idea 以此为基础,设计并实现了基于sca规范的ofdm波形应用;论文的一个突出特点是从波形开发的各个阶段都严格遵循信息系统工程思想:在需求分析阶段使用用例图方法建立了系统的逻辑模型;在设计阶段将具体的ofdm通信技术与sca规范结合起来,得到了波形的详细模型;最后在实现阶段,使用语言映射机制,将与平台无关的系统模型映射为与具体平台、语言相关的程序框架,并最终实现了windows / vxworks下的ofdm软件波形应用。
Consequently in order to make up the faults that hydro turbine models are single and simply and models of complex conduit system are scarce , it is necessary that the detail models of hydro - electrical system be established to make crossed study of different subjects and the simulation arithmetic of the large - disturbance transient be studied 因此，开展学科交叉研究，建立合理的水电系统详细模型，研究水电系统大扰动过程的仿真算法，对于弥补我国电力系统仿真计算中存在的输水系统?水轮机模型过于粗略的不足，提高水电系统仿真水平，是非常必要的。
In this paper , based on the tide , tidal current and ocean wave numerical computing techniques and the constructive method of seabed terrain model , the fusion and visualization of multiple digital marine geographic environmental information for the nearshore marine environmental safeguard are locally realized by using the level of detail model and 3 - d rendering technique , which will provide theoretic and experiential basis for the study field in the future 摘要以潮汐、潮流和海浪数值的计算技术和数字海底地形模型的构造方法为基础，应用层次细节模型和三维渲染技术，完成了近岸海洋环境保障的多种数字海洋地理环境信息的融合与可视化的局部实现，为今后此领域的研究提供了理论和经验基础。
In the chapter three , the iterative incremental architecture - centric and use case driven development process is introduced . and afterwards , the whole software system named n2010 is analyzed and designed with detailed models , according to the process and in term of the criteria and requirements of uml 在第三章中，主要介绍了迭代式的、增量的、以体系结构为中心的、用况驱动的开发过程，并根据此开发过程和uml的规范和要求，对n2010色谱工作站进行了详细的建模设计。
On account that models of conduit system and hydro turbine are oversimplified , first of all the detail models of complex conduit system and hydro turbine are summed up , and then the detail models of hydraulic system and power system which are fit for the large disturbance transient calculation are established , including auto modeling models of complex conduit system based on the characteristic equations , linear and nonlinear models of francies " hydro turbine , surge tank ' s current model and generator ' s model , governor ' s model , excitation system ' s model and grids " model in the thesis 鉴于电力系统研究中输水系统和水轮机模型过于简单的情况，本文首先归纳引入了复杂输水系统和水轮机的详细模型，建立了适合大扰动动态过程计算的水电系统详细数学模型，包括基于特征线法的复杂输水系统自动建模模型、混流式水轮机的线性模型和非线性模型、调压井通用模型、同步发电机模型、调速器模型、励磁系统模型和电网模型等。
Abstract : on the basis of analyzing the methods of functional modeling and spatial package design , the stratege of spatial package based on functionality is proposed . a procedure is deduced from concept modeling , geometric modeling and detail modeling in concise and efficient formation 文摘:在分析产品的基于功能的设计建模方法和空间布置设计方法基础上，提出了有效的基于功能的空间布置设计的三个求解层次：基于功能的空间布置概念设计层、基于功能的布置装配几何建模层和基于功能的数学建模的详细设计层.这些模型以简洁、统一的形式加以表达，具有高效的可构造性
According to above research , the two algorithms that is a level of detail model generation algorithm based on geometrical feature and the progressive mesh generation algorithm mentioned above are implemented by c + + language . the practice application shows that these algorithms are efficient in both time and space , and they can preserve the vital geometrical features can be preserved after the simplification 在算法研究的基础上,用c + +实现了基于几何特征的细节层次模型生成算法和基于边折叠的渐进网格生成改进算法,应用效果表明,这些算法具有效率高,占用存储空间少,简化后的网格模型仍能保持重要的几何特征等优点。
