查询词典 during the course of

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。

During the course of the demo, Terryl shows how she indicates forms and planes, how she chooses and applies color, and how the underlying skeleton and muscular systems affect the surface anatomy.

Terryl在教学中告诉大家她是如何使用造型与参考平面，如何选择与应用色彩，那些内在的骨架与肌肉如何体现在绘制的生物的外表中。

During the course of the demo, Terryl shows how she indicates forms and planes, how she chooses and applies color, and how the underlying skeleton and muscular systems affect the surface anatomy.

创意角色怪物设计教程，在这第一部DVD教学中，Terryl Whitlatch 演示如何创造一个神奇尚未完全可信的创造物之一，最常见的已知的动物：国内奶牛。

The size of the sections will vary depending on contours, structure, and how many places I may want to check out during the course of the day based on what the map shows me.

大小路段将视乎轮廓，结构多少地方我想看看过程基于何种天图显示我。

The size of the sections will vary depending on contours, structure, and how many places I may want to check out during the course of the day based on what the map shows me.

大小路段将视乎轮廓，结构多少地方我想看看过程基于何种天地图显示我。

When my friend producer Brendan O'Brien heard the new songs, he said,'Let's keep going.' Over the course of the next year, that's just what we did, recording with the E Street Band during the breaks on last year's tour.

The Rising》等等这样有着鲜明主题的专辑中，无论是赞扬或者谴责，音乐当中所包含的态度一直稳固地站在工人阶级的立场之上，为他们打抱不平，也用其浑厚的嗓音为他们灌输力量。

In the level of material system, as the main body of writing, literary workers possessed the "organization" problem, which is undoubtedly an outstanding historic phenomenon during the course of the practice of the Seventeen-year Literature.

广义的政治文化分三个层面，一则为政治制度层面，一则为政治思想层面，再则为政治心理包括政治信仰、政治价值等层面。17年政治文化在这三个层面全面地影响着新中国建国后17年的文学。

The safety investigation about the emulsion explosive and ammonium nitrate has been never terminated since many accidents about the explosion of emulsion explosive and AN have happened in the history, most of which suggest that the explosion is because of the heat accumulated by their decomposition during the course of production and storage.

乳化炸药和硝酸铵在生产和储存过程中曾经发生过多起爆炸事故，人们对其安全性的关注从来没有间断过。

During the course of building model, considering practicalrequirement qualification, this text has arranged recycling water requirement order and realized preferable supply strategies in the condition of lack water. According to requirements, the same kind water use is optimized. Optimized scheme build five linotyped plan models, which achieves total perfect of recycling water recourses.Geography information system has offered the revelation, storage, analysis and management of space datum.

在建立模型的过程，充分考虑到结合实际的需求条件，将再生水的需求类型排列次序，在再生水供给不足的条件下，实现优先供给策略，对于同类型的用水还要根据其用水地大小和需求量多少再进行优先供给，优化配制共建立了五套线性规划模型，五套模型的组合使用较好的实现了再生水资源的总体优化。

B. At some point during the course of the disorder, the person has recognized that the obsessions or compulsions are excessive or unreasonable.

强迫症发生的时候，你意识到这种强迫的念头、强迫的行为过分了，没有理由这样做嘛。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。