降低电压的

This indicates the presence of the surface states on the surface of the barrier layer.

近期的研究表明，在GaN和AlxGa1-xN势垒层的表面存在表面态，这对GaN和AlxGa1-xN/GaN异质结中载流子的分布有显著的影响[8～ 11] ，从而对基于调制掺杂AlxGa1-xN/GaN异质结构器件的性能有着很大的影响，会降低载流子浓度和漏电流，减小器件的跨导和阈值电压。

It is found that the utilization of BAlq3/Alq3 isotype heterostructure emitter further reduces the leakage current, leading the BAlq3/Alq3 isotype heterostructure-based devices to higher output current and higher common-emitter gain at the same operational voltage compared to the case of Alq3 as the emitter.

研究发现，同Alq3单发射极层结构的金属基极晶体管相比，BAlq3/Alq3异质结发射极层的使用进一步降低了器件的漏电流，使器件在相同的电压下表现了更高的输出电流和更高的共发射极增益，为进一步实现高性能金属基极晶体管提供了新的方法。

So, When the power system is in transient, the sliding mode control rule is chose directly to make transient component decrease quickly, and when the power system is in stability, the direct current control method based on voltage space vector method is imported to make the error current reduce to zero by inches and avoid surge.

为此，当系统处于暂态时，论文直接选择滑模控制率使暂态分量迅速减小，当系统处于稳态时，引入基于电压空间矢量的直接电流控制方法，使误差电流趋于0缓慢变化，在有效补偿系统无功的同时，提高了系统的动态特性，并大大降低了系统振荡的可能性。

In order to improve ability of anti-jamming, nowadays output of many measure-control systems' sensor is three thready difference signal and differ voltage range. Commonly, this signal is transacted by complex circuit , then it is collected. In this way, hardware cost of system is increased and precision of system is reduced.

现在很多测控系统为了提高抗干扰的能力，传感器输出信号多为3线制的差分信号，而且电压范围也不同，通常采用的方法是把差分信号通过复杂电路进行处理后再进行数据采集，这样不仅增加了硬件成本，还使系统的精度降低。

The good performance is related to the low work-function metal, Ytterbium, makes the threshold voltage lower successfully and small equivalent oxide thickness by high κ dielectric material.

这些良好的特性是因为拥有低功函数的镱可以成功的将临界电压降低，还有高介电系数介电层闸极可以得到较薄的等效氧化层厚度。

A phase-shifted controlling PWM DC/DC full bridge converter with softswitching is proposed and used to realize a constant current power of20A(5～48V).This full bridge converter utilizes the transformer leakageinductance(or the resonant inductance in series with transformersprimary)and the autoecious capacitance of MOSFET to achieveZVS(Zero-Voltage-Switching),as a result it can decrease the switchingwaste,increase the switching frequency,and diminish the power bulk.

本文使用一种通过移相控制进行脉宽调制的软开关全桥变换器来实现20A(5～48V)恒流源，这种全桥变换器利用变压器的漏感、原边串联谐振电感和功率管的寄生电容来实现开关管的零电压开通，降低了开关损耗，提高了开关频率，减小了电源体积。

Power utilization is a process that transforms electrical power into other forms of energy. The tranformer is placed in the distribution network at lower the voltage to a triphase of 380V or singer-phrase of 220V and then the current goes through electric equipment.

用电主要是通过安装在配电网上的变压器，将配电网上电压进一步降低到380V线电压的三相电或220V相电压的单相电，然后经过用电设备将电能转换为其他形式的能量。

A new design scheme, with the sample current circuit by the use of MAX471 and regulate component of P type MOSFET, is presented in this paper. With the use of MAX471 and ultra low on-resistance components P-MOSFET, the new power circuit results in a very low drop-out voltage, and conversion efficiency is very high, presenting a very good application future.

改进了某井下物探仪器的电源电路，采用MAX471进行电流取样，可以显著降低电流取样引起的压降，用P型大功率MOSFET替代原电路中的限流管和电源电压调整管，设计成功一种新型超低压差限流稳压电路，提高了电源效率，取得了很好的实际应用效果。

We demonstrated ultra-thin tandem WOLEDs by locating yellow and blue emitters at corresponding first antinodes to the metal electrode, instead of 1st and 2nd antinodes in conventional tandem OLEDs. This attempt leads to the substantial reduction of operating voltage improvement in power efficiency, compared to conventional tandem WOLEDs. Besides, it shows stable EL spectra under various bias conditions.

本论文提出一超薄堆叠串接型有机白光元件结构，系利用不同波长的光其反节点位置不同的特性，将黄光及蓝光分别制作於各自的第一反节点，而得以在维持原发光效率的前提之下，减少元件整体厚度，进而降低操作电压及提升元件能量转换效率之目的。

It is pointed out that the core brittle fracture is caused by extremely uneven voltage distribution along the insulator string and irregular designing and mounting of grading ring which leads to deformation of electric field on conductor end of insulator.It is proposed to replace the suspension clamp by a "八"shape joint strap and installing a glass insulator at this space or introducing a special composite insulator-gla...

通过对原线路双联悬垂复合绝缘子下垂式线夹挂点进行&八&字形改造；利用下垂式线夹缩短的距离在导线侧增挂玻璃绝缘子；新建线路采用特制复合绝缘子与玻璃绝缘子组合方式，使复合绝缘子均压环，接头连接处远离高压端，改善了复合绝缘子的电场分布，降低了复合绝缘子导线端承受的电压，消除了畸变电场，避免了棒形悬式复合绝缘子芯棒脆断，取得了良好的效果。

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％。