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In new structure, magnetic field in winding window area is distributed more uniform than that of simple lumped air-gap structure, resulting in reduction of AC winding loss greatly.

新结构通过在开集中气隙的高磁导率磁芯柱与线圈间加入低磁导率磁材料，为电感器的磁压分布构造一辅助磁路，进而使电感器线圈窗口内的磁场分布均匀化，大大减小了线圈涡流损耗。

In this thesis, the device degradation of low-temperature polycrystalline thin film transistor under gate AC stress in off region with drain bias has been investigated.

在这篇论文中，我们研究了低温复晶矽薄膜电晶体在闸极负偏压脉波且汲极直流偏压的劣化，我们观察到在汲极端会有一个严重的劣化，当闸极操作在负偏压交流讯号且汲极直流偏压下会量测到一个电流(在此我们称为pump current)。

"Our next matches are with Milan, Roma and Fiorentina," he said.

"我们的下场比赛是挑战AC米兰、罗马和佛罗伦萨，"他说。

First, the paper reviews the development and research of AC transfer speed system, introduces the different control strategy of transfer speed system for asynchronous motor, and discusses the basic principle of vector control system for asynchronous motor in detail,including the mathematics model and coordinate transformation of asynchronous motor, the fundamental equation of vector control, the estimation method of rotor flux, the system structure of vector control etc. Then, the paper lays stress on the fundamental principle, control algorithm and realization method in TMS320LF2407 of space vector pulse width modulation technology.

本文首先简述了交流调速系统的发展和研究重点，介绍了异步电机调速系统的不同控制策略，详细论述了异步电机矢量控制系统的基本原理：异步电机的数学模型和坐标变换、矢量控制的基本方程式、转子磁链的观测方法、矢量控制的系统结构等，并重点分析了空间矢量脉宽调制技术的基本原理、控制算法以及在TMS320LF2407中的实现方法。

This paper introduces the basic theory of fly-back topography and current mode PWM firstly. Then the total structure of the single-chip controller is present according to the function requirement and the working theory and the working principle are showed based on its actual application.

文中首先分析了反激变换的拓扑结构及电流反馈模式PWM控制的工作原理，然后根据设计要求完成了AC/DC电源管理集成电路整体结构的设计，同时结合实际应用电路阐述了其工作原理。

The fly-back topology is adopted for DC/DC boost stage for simplicity. Moreover, full-bridge topology is used for DC/AC stage to give a low frequency square wave power to HID lamp avoid the acoustic resonance.

直流/直流升压级采用电路简单之返驰式转换器；直流/交流级则利用全桥式转换器以提供低频方波电能并藉此避免音频共振。

With the same as AC induction motor, the article also introduced the mathematical model and FOC of ACI.

然后给出了异步电机的数学模型，分析了异步电机矢量控制的原理，并给出了实现方式。

We need tosharpen our foc us to help ac hieve our global mission.

我们需要加重我们的重点以协助达成我

During the control of flux, the idea of FOC is used to decrease the response time of flux. As a result a FOC control of AC driver is performed first.

在转矩控制中，主要利用磁通角的改变来控制转矩，以提高转矩响应的速度。

Stress key con-struction,one is the key view that ac cords with Marxism ,two is from the lo ng -termness of task,formidableness is decided ,three is to had been practis ed prove is effective channel.

突出重点建设一是符合马克思主义的重点论二是由任务的长期性、艰巨性所决定三是被实践证明是行之有效的途径。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。