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The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

Knight of the reasons may be no conflict between the three-line, a matter for each stem, and the Master of the three-line have one thing in common - all three grades PK.

原因可能是骑士的三系之间没冲突，各有各的事干，而法师的三系都有一个共同点-三系都能PK。

In order to understand the swirl system deeply,the three-dimensional particle dynamic analyzer was used to measure the velocities of the steady turbulent cold flows in the swirl three-branched modular junction located at the end of the exhaust system,and three-dimensional numerical simulation of the flows was carried out by use of the ALE algorithm.

为了深入研究螺旋流排气系统的工作机理，作者利用三维粒子动态分析仪(3D-PDA)，对一始端螺旋流三分支模件的稳态湍流流场进行了测量，并用ALE法进行了三维流动数值模拟。

Along with big three arrivalses, I also will continuously favour, on the other hand, Be college of study department minister, again just right meet with an undergraduate course valuation, in spite of to who is all kind of pressure, besides is the teaching of the Ministry of Education valuation, that still is not my head up, school begins two month estimate favour dead, attended Normal University television station in Fukien on the other hand, participate television station of work, do film, return have what than the consume more of, again remove have a class of time, I estimate I possibility also have no when, luckily big three since need not learn English also need not learn athletics, easy is easy not a few, but face profession of thorough mental state more or less also have some touch, particularly is more and more of person all seem to have oneself of direction, but I seem to seem big two just just started grope for similar, we the class believe to will haven't a few violent girl and boy devotion to test to grind battalion, everyone also more and more went by different roads, believe big three big four ～ss~～ the person be more and more fickleness, ha ha.

随著大三的到来，我也将陆续忙起来，一方面，作为学院的学习部部长，又刚好碰上本科评估，不论对谁都是一种压力，何况是教育部的教学评估，那还不就是我的头上，开学两个月估计得忙死，另一方面，参加了福建师范大学电视台，要参与电视台的工作，做片子，还有什麼比这个更耗时的呢，再除去上课的时间，我估计我可能也没有什麼时间了，幸好大三既不用学英语也不用学体育，轻松是轻松了不少，但面对专业的深入心理多多少少也是有一点触动的，尤其是越来越多的人都似乎有了自己的方向，而我似乎好像大二才刚刚开始摸索一样，我们班相信会有不少强悍的女生和男生投入考研大军，大家也就越来越分道扬镳了，相信大三大四～~～人是越来越浮躁的，呵呵。

This research is concentrated on the interactive behavior between the cold-formed steel wall stud and sheathing. Three kind of test specimens used in this study includes:(1) both stud and calcium silicate board are under compression;(2) the stud sheathed with calcium silicate board is under compression; and (3) the calcium silicate board supported by stud is under compression. Three different thicknesses of calcium silicate board and three different spacing of the connecting screw were adopted in the test. Totally, 36 specimens were tested in this research.

本研究乃针对冷轧型钢墙体立柱与外覆材产生束制的能力进行探讨，实验所采用的试体分为三种，具外覆材之墙体、具外覆材支撑之立柱、外覆材受压内含支撑之立柱，并配合不同厚度之矽酸钙板与改变不同螺丝间距进行互相比较，共进行了36组试验。

Qingfeng sink deep inside the area, steep-walled back, Blot out the Sun Zhu Shu, awe-inspiring temples, the main scenic area covers an area of 2500 mu, at last, in the next three Temple;-Qiang of the Three Gorges, located at the junction of Green God with Leshan, a total length of 25 Km sub-Schott, North Mindanao, the Three-Qiang, for the ancient Shu Qiang residence.

景区内青峰冥壑，峻壁回流，竹树蔽日，殿宇森然，主景区占地2500亩，分上、中、下三寺；平羌三峡，位于青神与乐山交接处，全长25公里，分犁头、北峨、平羌三峡，古为蜀羌人居住地。

Experimental results show that the 3D SPEZBC algorithm has the same rate-distortion performances of three-dimensional embedded zero block coding (3D EZBC) algorithm, obviously outperforms three-dimensional set partitioned embedded block (3D SPECK) algorithm, three-dimensional set partitioning in hierarchical trees(3D SPIHT) algorithm and (AT-3D SPIHT) algorithm, and is slightly better than JPEG2000 multi-component (JPEG2000-MC) algorithm at different bit rate in the compression performances.

实验结果表明，3D SPEZBC算法具有与三维嵌入式零块编码(3D EZBC)算法相同的压缩编码性能，在各比特率下编码性能均明显优于三维集合分裂嵌入式块编码(3D SPECK)、三维等级树集合分裂(3D SPIHT)和非对称三维等级树集合分裂(AT-3D SPIHT)算法，并且略好于多分量JPEG2000编码(JPEG2000-MC)算法。

Exhibition hall is divided into four, nine galleries, one of electric and magnetic layer for the area, power and machinery area, math section, the universe and Space Pavilion, set up a high-voltage discharge, electric magnetic Gallery, bowls, a typical mechanical transmission, three-dimensional coordinates and other exhibits; the second floor for the sound and light booth, Applied Technology Pavilion, set up a light display, three-dimensional holographic images, sound simulation, laser laser, simulated driving and other exhibits; three for the Life and Health Pavilion, set up a false impression cylinder, fitness tests, brain and facial features, body systems, such as exhibits; underground floor for temporary exhibitions; in the Office of the Hebei Academy of Sciences set up a pavilion style.

展厅共分四层，九个展区，其中一层为电与磁展区、力与机械展区、数学展区、宇宙与航天展区，设置了高压放电、磁电廊、滚球、典型机械传动、三维坐标等展品；二层为声与光展区、应用技术展区，设置了光路展示、全息立体影像、声音模拟、激光内雕、模拟驾驶等展品；三层为生命与健康展区，设置了错觉滚筒、体能测试、大脑与五官、身体各系统等展品；地下一层为临时展览；中厅设置了河北院士风采展区。

Afterwards,this paper presents typical station type selecting model by taking unidirectional three-stage/three-yard Marshalling station and bidirectional three-stage/six-yard Marshalling station as representation.At last,northern Xuzhou is applied to a numeral example to validate the effect of this method,which proves that station type selecting by means of comparing the total waste of wagon flow in the Marshalling station from the view of wagon flow structure is not only effective but scientific,meanwhile,this provides a scientific and effective decision-making measure for determining the scope and layout of Marshalling station.

在上述研究基础上，以单向三级三场和双向三级六场为代表，构建能力约束条件下的典型单双向系统的择优比对模型，并通过徐州北编组站进行实例验证，从中看出，从车流结构入手，根据各种车流在编组站所消耗总费用的高低来进行站型选择不仅切实有效，而且经济科学，同时，这也为全面定位编组站的规模和布局提供了一种科学有效的决策手段。

Iv Designate whether Complainant elects to have the dispute decided by a single-member or a three-member Panel and, in the event Complainant elects a three-member Panel, provide the names and contact details of three candidates to serve as one of the Panelists these candidates may be drawn from any ICANN-approved Provider's list of panelists

iv指定申诉方选择解决争议的陪审团是由一个或三个成员组成，并且，如果申诉方选择三人的陪审团，应提供作为其中一个陪审员的三个候选人的名字和联络细节这些候选人可从icann认可的服务提供方陪审员名单中挑选

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。