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The paper aim at the three-phase voltage source SPMW-inverter, which is applied in variable-speed wind turbines system, adopts the theory of nonlinear counterchange and nonlinear feedback, creates the three-phase voltage source PWM-inverter's nonlinear model, and deduces it's feedback linearization equation, consequently, the three-phase voltage source PWM-inverter active and reactive current decoupling control is proposed.

该文针对变速风力发电机组系统所用的三相电压型SPWM 逆变器，采用非线性变换和非线性反馈理论，建立了三相电压型 PWM 逆变器非线性数学模型，推导出其反馈线性化方程，从而得出三相电压型 PWM 逆变器有功电流和无功电流的解耦控制策略。

Through comparing palladium film to absorb hydric around output carries the change of voltage, reached the different parameter of palladium film is affected to what the system outputs, the stretch model of palladium film measures decrescent to make the amplitude that outputs voltage increases, defer time grows; density decrescent to make output the amplitude decrescent of voltage, defer time shortens somewhat.

通过比较钯膜吸收氢气前后输出端电压的变化，得出了钯膜的不同参数对系统输出的影响，钯膜的弹性模量变小使输出电压的幅值增大，延迟时间增长；密度变小使输出电压的幅值变小，延迟时间略有缩短。

Through dynamic examination of electrolyses, this paper research on treatment efficiency of bipolar packed bed cell under different voltage, electrolyses time, PH value andThe experimental results show that the decompounding speed of phenol decrease with the electrolyze time increasing. With the cells voltage augment the decompounding rate of phenol increase also. But when the voltage exceed 10V, the increasing speed of decompounding rate decrease.

BPBC处理苯酚废水的实验研究结果表明，苯酚的降解速率与酚浓度呈一级反应关系，即随着实际电解时间的增加苯酚降解速率逐渐减小；随着槽电压的增大，苯酚的去除率也随之增大，但是槽电压超过10V后，苯酚去除率增加趋势减缓；在碱性条件下，pH值的变化对苯酚的去除率有一定的影响，随着pH值的增大，去除率逐渐的降低；空床流速过大时，苯酚去除率有一定的下降；投加电解质后，苯酚的去除率增加，而就投加NaCl和NaNO_3的情况下，投加等摩尔浓度的NaCl和NaNO_3，投加NaCl的效果要优于投加NaNO_3的效果；提高废水中的溶解氧有利于苯酚的去除。

Single-phase Sinusoidal Pulse Width Modulation Inverter Power Supply in this paper belongs to AC power supply (AC-DC-AC convert). Control mode adopts feedback of voltage control. The methods of intermitting power flux and changing duty-cycle can change pulse width of drive voltage that adjust and rectify output voltage ultimately.

本文设计的单相脉宽调制逆变电源属于交流电源，采用电压反馈控制，通过中断功率通量和调节占空比的方法来改变驱动电压脉冲宽度来调整和稳定输出电压。

After the application of this model to the MITL-A of Sandia Z-accelerator, it is found that: the formation process of magnetical insulation leads to the increase of line current and the decrease of line voltage; If the initial line current is infinite, the terminal line voltage and current are almost the same as the initial ones; If the ratio of the terminal space-electron current to the terminal line current is less than 10%, the change of terminal line voltage and current of the MITL-A relative to the initial is less than 5%.

将模型应用于Z加速器的MITL-A发现：磁绝缘形成过程将导致线电流增加和线电压降低；如果初始时刻的线电流无限大，则终止时刻的线电压和线电流与初始时刻相同；当终止时刻的空间电子电流在线电流中的比例小于10%，则MITL-A终止时刻的线电压和线电流较初始时刻的变化在5%以内。

Accurate analog power is to provide power, digital chip, amplifiers, microcontroller is the voltage required by A/D sampling data output voltage, and comparison, if there is A deviation is the limit, adjust output signal output and closure, alarm, The working process of the working status, manostat by SCM outputs drive LED display, Display circuit used to display the size of the output voltage of power.

准确说就是模拟电源提供各个芯片电源、数码管、放大器所需电压，单片机则通过A/D采样输出电压，与设定值进行比较，若有偏差则调整输出，越限则输出报警信号并截流；工作过程中，稳压电源的工作状态均由单片机输出驱动LED显示；显示电路用于显示电源输出电压的大小。

Therefore, the exact relation between the unbalanced input voltage and the noncharacteristic harmonics of the output voltage in the 12-pulse rectifier system is obtained. In addition, the relation between the input current and the imbalance of the input voltage is obtained, which could help to choose the filter elements and exactly analyze the characteristics of the no controlled rectifier circuit.

利用精确的开关函数，推导了多脉波整流系统输入不平衡电压与输出电压非特征谐波的精确关系，进而得到电阻、电感负载时系统输入电流与输入电压不平衡度的关系，为精确地选择滤波元件做了有意义的探索。

The relation between quiescent point and voltage gain,input resistance,output resistance, maximum nondistortion output voltage ,dynamics parameter in amplifier is discussed by commom-emitter fixed-bias amplifier,the effective methods to improve voltage gain are deduced,and how to set reasonale quiescent point′s position based on amplifier′ different is also presented finally.

以共射固定偏置放大电路为例讨论放大电路中静态工作点与电压放大倍数、输入电阻、输出电阻、最大不失真输出电压等动态参数的关系，得出提高电压放大倍数的有效方法。

Firstly, corona inception voltage of the post insulator and surface leader inception voltage of the bushing versus relative humidity were investigated. The predischarge phenomena in connection with relative humidity were observed under AC voltage by photographing.

首先，对支柱绝缘子的电晕起始电压及套管表面先导起始电压与空气相对湿度的关系进行了研究；用静止照相的方法分别观察了支柱绝缘子和套管在不同相对湿度范围内的工频预放电现象。

The good of SEPIC layout depends on: No matter input voltage prep above or under output voltage, can offer stable output voltage.

SEPIC结构的用处在于：无论输入电压高于或者低于输出电压，都能够供给不乱的输出电压。

That perception can be offset by the use of finials, or top caps.

这种看法可以抵消使用的窗帘，或顶帽子。

This is a custom peculiar to people in that province.

这是该省人们特有的一种风俗。