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S1 is then changed to position 1. The voltage stored on C1 is inserted between the output and inverting input of the amplifier and the output of the amplifier changes by VIN to maintain the amplifier input at the input offset voltage. The output then changes from (VOS + IbiasR2) to (VIN + IbiasR2) as S1 is changed from position 2 to position 1. Amplifier bias current is supplied through R2 from the output of the amplifier or from C2 when S1 is in position 2 and position 1 respectively. R3 serves to reduce the offset at the amplifier output if the amplifier must have maximum linear range or if it is desired to DC couple the amplifier.

接着 S1 拨到位置 1，使 C1 的电压加在放大器的输出端和反相输入端之间，(由于电容端电压不能突变，所以)输出端的电压将产生大小等于 VIN 的变化，使放大器输入端维持输入失调电压，即当开关 S1 从位置 2 拨到位置 1 时，输出端电压将从(VOS + IbiasR2)变为(VIN + IbiasR2)。S1 处于位置 2 时，放大器的偏置电流是由输出端经电阻 R2 提供的，当 S1 转向位置 1 时则由 C2 提供。R3 的作用是降低输出失调电压，如果要求放大器具有最大的线性范围，或者采用直流耦合，就应该使用该电容。

XRD, Raman spectroscopy, DC four-probe, impedance spectroscopy and SEM were applied to analyze the crystal structure, ionic conductivity and microstructure, respectively.

用XRD，Raman光谱，直流四电极，交流阻抗谱和扫描电镜分析了电解质的晶体结构，电化学性能和显微结构。

Carbon nanotubes are used to solve this problem effectively in this project. As controlled DC voltage is applied to the CNTs electrode, the sharp tips of CNTs can generate high electric fields, so it was easy to ionize gas and get larger current at lower voltages.

纳米碳管的出现有效地解决了该问题，在外加直流电压激励下，纳米碳管的尖端会形成很强的非均匀电场，在电压相对较低的情况下能很容易地电离气体且获得较大的放电电流。

For the case in a dc-bichromatic electric field (wB= 0), when one of the ratios is an irrational number, the other is a rational number, the dynamicallocalization always remains.

在直交流外场下，当其中一个比率是有理数，另一个是无理数时，总是保持动力学局域化；当两个比率都是有理数或无理数时，动力学局域化发生在准能带塌缩点。

Mike Gold, director of Bigelow Aerospace's office in Washington, DC, has nothing good to say about the country's export policy:"if the purpose of ITAR is to lose billions of dollars of business, ship jobs overseas, and the Iranians and the Chinese get the same technology anyway, then mission accomplished." The regime, he says, is obsolete and counterproductive.

位于华盛顿特区的Bigelow 宇宙办公室的总裁Mike Gold，他说道美国的出口政策时没什么好话，他说，"假如ITAR的目的是丢掉几十亿美元的生意、将成百万件工作送到国外，以及让伊朗人和中国用某种方式获得相同技术，那么它成功了，它的目的达到了。"

Results of calculation examples show that the proposed DC Jacobian matrix method is of superiority in computation speed and optimal result.

算例表明，直流雅可比矩阵法在计算速度和优化结果等方面都具有很大的优越性。

Designed a commutator jumpiness measuring instrument , which was used to measure jumpiness between slices and circumferential jumpiness of commutator in DC machine .

设计出一套换向器跳动测试仪，用于测量直流电机换向器超速前后片间跳动和圆周跳动。

The resonance tank includes four p-n junction diode varactor pairs and a spiral inductor for each differential VCO, and a voltage- level-shift circuitry is utilized to decide proper DC levels for each pair of varactors.

此共振腔由四对PN接面式可变电容器及一个螺旋型电感所组成，并有一个电位偏移电路用来适当决定每对可变电容之偏压点。

Just look at how Tevez has struggled," said Dave Kasper, DC United's technical director."

看看特维斯都遇到了什么，"特区联队技术总监德福-加斯普说。"

HVDC is an ABB innovation that transports large power loads over long distances with low losses and minimal environmental impact, requiring just two500 kilovolt DC power lines to carry the same power load as five alternating current lines.

HVDC技术是ABB的一项创新，在长距离的传输中，它传送大量的电量，而损失很低，而且对环境的影响也达到最小化，只需要两条500千伏的直流电线就可以运载相当于五条交流电线输送的电量。

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。