提高功率的

In order to improve the power quality of distribution network system, one of the most effective methods is reactive power compensation. In this paper, the Distribution Static Synchronous Compensator for reactive power compensation was studied, and then the digital controller based on One-cycle control was designed. The waveforms of experimental device based on DSTATCOM of one-cycle control were given in this paper. It can be seen from the results that the fluctuation of DC capacitor voltage is lower, the dynamic response speed of DSTATCOM providing or absorbing reactive power is fast, and the accuracy of steady-state compensation can achieve the requirements of reactive power compensation in engineering basically

为了提高配电网系统的电能质量，对无功功率进行精确补偿是非常有效的方法之一；本文研究了配电网静止同步补偿器用于无功补偿，并设计了单周控制的数字控制器；文中给出了基于单周控制的DSTATCOM无功补偿试验装置工作过程中的波形曲线，从试验结果可见，本文设计的单周控制DSTATCOM无功补偿装置的直流侧电容电压在工作过程中波动较小，装置发出或者吸收无功功率的动态响应速度较快，稳态补偿精度基本能够达到工程中无功补偿的要求。

Based on surveying the development of variable frequency power supply and analyzing its development tendency, and considering the practical features of the assignment, the conversion system is designed as follows: it selects the 3-phase Pulse Width Modulation Engine SA4828 as the PWM control signals generator; it chooses the single-chip-computer PIC16F877 as the microcontroller, which integrated the A/D modulation, which cuts down the complexity of the hardware system and strengthens the dependability of the system.

在论述和分析了变频电源及其控制技术发展的概况和趋势的基础上，结合本课题任务的实际要求，设计了一套中小功率的逆变电源。系统中PWM控制信号采用专用集成芯片SA4828生成，减轻了控制器的工作量也提高了系统的可靠性。控制器选用集成了A/D转换器的单片机，使得系统的硬件复杂性降低，提高了可靠性。

The results show that the ingather of tungsten in the composites using internal feedstock injection is higher than that of the composites using external feedstock injection. For the composites using IFI method, the influence of input power on the copper oxidation is not evident, while more and more cuprite (Cu2O) is detected with the increasing of input power for the composites using EFI method. The thermal conductivity of WCu composite is lower than the theoretical value by ROM.

结果表明，在内部送粉条件下，复合材料中钨的收得率要高于外部送粉条件下复合材料中钨的收得率；在内部送粉条件下，功率对铜氧化的影响并不明显；而在外部送粉条件下，随着功率的提高，铜的氧化明显增多；由于氧化物和孔隙等的存在，利用大气等离子喷涂工艺制备的复合材料的导热率远远低于根据混合法则计算的理论值。

The three-phase full-wave rectifier charging system is composed of 3 silicon-controlled rectifiers and 3 diodes, and a variable resistor is used to adjust the trigger level such that the power factor of generator can be raised, the current harmonic content can be reduced, and the operational efficiency of generator can be improved.

本研究之整流充电系统，为利用三颗矽控整流器和三颗二极体组成的三相全波矽控整流充电系统，利用VR可变电阻调整元件来做触发机能，可使发电机端功率因素提高，降低电流谐波含量，得到稳定的直流链电压，提高发电机的运转效率。

It is analyzing framework and factor by touch ElectroMagnetic Compatibility capability, premeditate essential project on pass high level testing of Electrical Fast Transient , synthesis material framework of power unit running restructure, it heighten capability criterion of EMC.

分析影响电磁兼容性能的结构与要点，预研出通过高等级的电快速瞬变脉冲群测试的基本型式，结合具体的功率单元结构进行更改，提高功率单元的EMC性能指标。

The investment of the constant capital is 319 thousand yuan, the investment of the flow capital is 50 thousand yuan The money includes self-raised money 269 thousand and the applied loans 100 thousand yuan.

该产品用于提高电网的功率因素，降低电网中的高次谐波含量，提高电压质量，故该产品满足城乡电网中用量最大的一种电容器，市场需求量极大。

The experimental results are shown that the microstructure of QT600-3 by CO_2 laser quenching is Aphanitic Martensite+Graphite,and residual stresses are all compressive,which is above 120 MPa,they increase with laser power.

结果表明：经CO_2激光淬火后QT600-3的显微组织为隐晶马氏体+石墨，残余应力均为压应力，其值在120 MPa以上，且随着功率的增大而增加；相变层深度随着扫描速率和光斑直径的增加而减小，且随着功率的增大而增加；激光淬火后的材料组织结构比较均匀，有利于提高凸轮轴的使用寿命。

People are devoted to discovering new methods to be more successful.

人们一直在不断探索提高其成功率的新方法。

And the theoretical analyses of this paper show that the new type of gyrotron structure introduced by the author is very advantageous of the stable-frequency output and improving single-mode operation stability, and the efficiency and the output power of the tube can be enhanced due to the effect of the feedback.

理论分析表明，本文所提出的新型回旋管结构极有利于稳频输出和提高单模工作的稳定性；由于反馈的作用，同时亦可提高器件的效率和输出功率。

In order to obtain more exact analytical solution to study the output characteristics of double-clad fiber lasers,according to the continuous-wave rate equations of fiber lasers,using typical parameters of double-clad fiber lasers,the contribution of the re-emission effect arising from the interaction between the upper-level atoms and pump light was estimated.Taking into account the predominant part of the re-emission to improve the accuracy of the integration approximated rate equations,the integration of the product of the loss and radiation should be found and explicit analytical expressions for the output of the DCFLs and gradient efficiency of the pump radiation,were deduced,and certain issues of concern were discussed.

为了求得用于研究双包层光纤激光器输出特性的更为精确的解析解，根据稳态速率方程组，针对典型的双包层光纤激光器参量，在估计了上能级粒子再发射项和抽运光产生的影响后，采用保留再发射贡献主导部分的办法以提高可积分近似方程的精确度，明确地提出了要获得光纤激光器输出功率的解析表达式的关键在于求出损耗系数与光场乘积的积分值，简洁地求得了输出功率和抽运光斜线效率的显函数解析表达式，并对其相关问题进行了讨论，以915nm，920nm和975nm的抽运光为例，当输出激光为1090nm时，得出975nm抽运光产生的斜率效率最高并可高达约87%。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。