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The second chapter analyzed its phylogeny, contrasted and classified the conformation in terms of the ancient period of external and internal and the modern times. The third chapter concluded the mainstream trend of transformation in contemporary days and sum up the character. Proceed with the basic patterns, the fourth chapter discussed the skills and technique of entrance space design concretely and practically. From the point of environment theory, the last chapter studied its meaning and function to surrounding quality, further advanced the ingression from a architectural element to a broad conception in city design.Combined with excellent examples of famous architect home and abroad, this thesis push forward its research to the skills and techniques of entrance space design.
全文共分五章,第一章阐述开展研究的背景,界定相关概念,提出研究方法与意义;第二章对于入口的沿革历程进行研究,并按外国古代建筑时期、中国古代建筑时期以及近现代建筑时期的分类方式对入口空间形态的发展衍变进行分析与对比;第三章对当代主流建筑现象进行分析,总结其特征,从类型学的角度分析其界定原型,从纷繁芜杂的建筑现象中归纳出当代建筑入口空间形态的发展变化趋势;第四章从入口形态的基本模式入手,具体而实际的探讨了入口形态的设计手法与技巧;第五章从建筑环境理论的角度,将入口空间这一建筑构成语素提升到城市设计领域,研究了其对于城市环境品质的作用与意义,以期在具体实践过程中激发设计者拓宽思路,创造宜人的可持续发展的环境。
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In this paper, resource and feature of three-dimensional data model to the arch tunnel and interior installation are mainly researched; design thinking of the arch tunnel model is given out; algorithms of three-dimensional model about tunnel body and the joint part of the adjacent to tunnel body are achieved; in addition, relevance algorithms of texture mapping technology to interior in tunnel body and three-dimensional model of interior installation of tunnel are also researched.
主要研究了拱形巷道及其内部设备三维建模的数据来源和特点;给出了拱形巷道建模的设计思路;研究了实现巷道体和相邻巷道体之间连接处三维建模的算法;另外也研究了实现巷道体内部纹理贴图技术及巷道内部设备三维建模的相关算法;研究了实现三维巷道漫游的算法。
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Biodiversity is one of the front areas of current biological research. The mechanisms of the formation, spatial distribution pattern, conservation and utilization of biodiversity have been an important area of biological and environmental research. In this study, through analyses of data about plant diversity, animal diversity, geographic factors, climatic factors, and energy factors by use of GIS software, statistic software and ecology software, the mainland of China was divided into 241 small districts of 2° by 2°. The environmental factors in each district were analyzed and isopleth maps of environmental elements were depicted.
生物多样性是当今生物学研究的热点问题之一,生物多样性的形成机制和分布格局以及保护利用问题一直是生物学和环境科学所研究的重要内容,本文由此出发,以中国陆地为研究区域,通过植物多样性数据、动物多样性数据、地理因子、气候因子、能量因子等资料,利用MAPGIS、MAPINFO等GIS软件,SPSS、DPS等统计学软件以及CANOCO等生态学软件,将中国陆地划分为241个小区,分析了各区内的环境特点,统计了各区内生物多样性的数量,并绘出环境因子等值线图,中国陆地种子植物科、属、种,裸子植物种、蕨类植物种、兽类、鸟类、爬行类、两栖类种数的等值线分布图,对中国陆地植物、动物多样性现状、分布格局及与环境因子的关系进行了研究。
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The thesis contains five chapters. The first chapter summarizes the development and research of switched reluctance drive, discusses the main research direction, and explains the main work in this paper. In chapter 2, hardware system which includes the design of power converter and various control circuit is discussed. TMS320LF2407 DSP is used to design the hardware circuits of SRM control system, and design details including the current detection, position sensing, fault protection, speed detecting, keyboard and display etc. are provided. Because of the full use of the abundant peripheral resources of DSP, it comes to the aim simplifying the circuit structure and heightening the reliability. In chapter 3, the application of neural network on SRM control system is introduced, a new the application of neural network and the method of sampling is proposed and a simulation system based on Matlab/Simulink is established. Chapter 4 discusses the routine designing issue. Because the modularized programming method is adopted, and multi-interrupt processing technique is used, operation efficiency of the control software is highly raised. At last, the foregoing SRM control system is tested. Speed adjustment is realized, and other targets on the research and design of SRM control system are reached, which establishes a good foundation for further research.
本文共分五章,第一章概述了开关磁阻电机调速系统(Switched Reluctance Drive,简称SRD)及其发展和研究现状,论述了其主要研究方向,并说明了本文的主要工作;接下来的一章主要讨论了SRM的硬件系统,主要包括功率变换器的设计和各种控制电路的设计,本文以TMS320LF2407为核心设计了开关磁阻电机控制系统硬件电路,给出了包括电流检测、位置检测、故障保护、测速电路及键盘和显示电路等部分电路的详细设计,充分利用了DSP的丰富外设资源,达到了简化电路结构、提高运行可靠性的目的;第三章介绍了人工神经网络在开关磁阻电机控制系统中的应用,提出了一种新的应用方式(利用GPFN神经网络调节PI参数)以及如何采取样本,搭建了基于Matlab/Simulink的仿真系统;在第四章中,讨论了开关磁阻电机控制软件的设计,采用模块化编程方法,采用基于多中断的控制程序,提高了控制软件的效率;最后,对所设计的开关磁阻电机控制系统进行了实验,实现了电机调速,达到了开关磁阻电机控制系统研究和设计的预期目标,为更近一步研究打下了基础。
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In the study of Mongolian lexicology there are two questions worth mentioning.
在蒙语词汇学中有两个值得注意的问题:一是蒙古教育类成语在结构、表达意义和表达方式等各个方面都反映出了极为典型的游牧文明的特征,是蒙古民族语言、文化和思维宝库的精华;二是现阶段众多和非亲属语言的对比研究中,蒙语和汉语在民族文化教育方面的研究工作和研究成果较少,需要进一步的深入研究。
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This dissertation is relation to SrO(La2/3Sr1/3MnO3)n the manganese oxides with RP structure. We mostly studied the structure and electrical transport properties, The major studies are listed below: The classes of magnetoresistance were introduced, the electron and crystal structure and the mechanism of double exchange of manganite pervosike related to colossal magnetoresistance have been summarized. More attention had also been paid to the advance in the study of RP structure manganite and grain system. The principle and process of sol-gel method were introduced. With sol-gel method a series of different grain size La2/3Sr1/3MnO3 sample were prepared.
本文以Mn3+:Mn4+=2:1的Ruddlesden-Popper结构锰氧化物SrO(La2/3Sr1/3MnO3)n为研究对象,系统的研究了利用溶胶-凝胶法制备的n=∞的La2/3Sr1/3MnO3和n=2的La4/3Sr5/3Mn2O7两个系列样品的结构和电磁性质,主要内容包括以下几点:简单介绍了磁电阻效应的分类,概述了具有超大磁电阻效应的锰基钙钛矿氧化物的电子晶体结构和双交换等相关的物理机理,给出RP结构系列锰氧化物的晶体结构和电磁相图以及研究状况,分析了颗粒系统的研究进展。
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We expect it will benefit the industry field to break through the optical measuring limits at present by offering some new ideas. Optical measuring research based on moire interferometry has developed for several decades. The main idea of this research is to utilize the moire effect caused by two superimposed gratings of identical or similar spatial frequency. One is the reference grating and it is a virtual grating created by a computer program in this research; The other grating is the image of grating projected on the measured surface by the DLP projector, and this grating will distort because of the different sloped profile of the surface. To superimpose the program-created grating and the captured distorted grating will derive the so-called moire effect. This research combined the basic theory of optical interferometry and moire effect to project the different phases of the projected grating fringes by the phase-shifting method and compute the principal value of arguments between -π,π. In the end, the phase unwrapping program based on discrete Fourier transform of solving PDEs is used to unwrap the phase of the measured surface, and finally the surface profile is derived by the optical measuring system.
以叠纹干涉术为基础的光学检测研究之发展早已行之有年,而在本研究中所采用的投影叠纹法(Projection moiré)之主要精神在於藉由两道空间频率相近或相同的光栅相互叠加而成的效应,其中一道为参考光栅,而本研究中的参考光栅是以程式产生可调整不同空间频率的虚拟光栅;另一道则为投影至待测物表面的光栅影像,而在起伏高度不一的待测表面上的光栅影像会受到待测物表面起伏状况不同而在观测方向产生光栅投影条纹影像的歪曲变形,将电脑产生的参考光栅与由影像撷取装置所获取投影於待测物表面的光栅影像作叠合,便会产生所谓的叠纹效应;利用基本的光学干涉理论与叠纹效应结合,本研究中以相移法来改变投影於待测表面的光栅相位,再以相移法的理论反运算出在带有待测面各点高度资讯之介於-π,π相位主幅角,再以离散傅立叶转换解偏微分方程的相位重建程式还原待测面的相位值,以得知待测面之表面轮廓。
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And then, the goal and content of this research were presented after analyzing the status quo and problem of nitrogen oxide pollution from power station.
在此基础上,对前人在燃煤氮氧化物防治领域的科学研究进行了回顾,然后,根据当前的研究现状及存在问题,给出本文的研究目的和主要研究内容。
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The main contents of this paper are listed below:In chapter 1, this paper introduces the research background , significance and its reasearch object, a single product distribution system of one-many network, then indicates that its reasearch core is to make a discussion about some typical distribution projects under definite condition of customer demand and explains why it does so.
论文的主要研究内容如下:第一章首先阐述论文的选题背景,研究意义,明确本文以One-Many拓扑结构的单物品物流配送系统为研究对象,主要讨论客户需求确定条件下的几种典型的配送方案,并给出从该角度研究IRP的原因。
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This thesis introduce the concept, character, and domestic and foreign circumstance of modern distance learning, analyze the possibility of developping distance learning, clarify the character and requirement of modern distance learning, after that using stream media technology to analyze the theory of technology, research the realization of stream media and the synchronization video courseware with teach planning and the encryptting method of stream file. At the end of this thesis, it research software and hardware system of distance learning, choose the phototype of the system, research system structure, flow and character.
本课题首先介绍了现代远程教育的概念、特点以及国内外现状,并对我国大力发展现代远程教育的可行性进行分析,明确现代远程教育的特点及需求,然后以流媒体为主要技术手段,分析技术原理,研究流式传输的技术实现、视频课件与教案的同步以及视频流文件的加密方法,最后对远程教育的软件、硬件平台进行研究,对系统进行选型,研究系统的结构、流程及特点,对使用到的MicrosoftWindowsMedia技术进行重点研究,然后提出流媒体的传送与播放的关键步骤,从而给出基于WindowsMediaService的远程教育系统,最后分析了基于流媒体技术的远程教育的特点。
- 推荐网络例句
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Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".
歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。
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This is Kate, and that's Erin.
这是凯特,那个是爱朗。
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Articulate the aims, objectives and key aspects of a strategic business plan.
明确的宗旨,目标和重点战略业务计划。