查询词典 DC

Multi-meter operations and Basic DC circuits, Oscilloscope Operation, Function, Generator Operations, RC circuits, RL circuits, Rectifier circuits, Rectifier circuits and Voltage doublers, Ohm's Law, RC 、 RL Circuit, RLC Circuit, Diode Lab - Part 1, Diode Lab - Part 2, Measurement of Force Effects in the Electric Field, Basic Current Balance, Force Effect of Currents, Measurement of Magnetic Field of Single Coils, Magnetic Fields of Paired Coils in Helmholtz Arrangement, Hall Effect in p-Ge/n-Ge, Faraday's Law, Transformers, Microwave I, Microwave II.

电磁学实验( S0339)(1，1)基本电子零件、直流电路，示波器与信号产生器的认识与使用，电容、电感的电路特性，整流与滤波，倍压整流电路，欧姆定律实验，电容、电感的电路特性，电阻、电容、电感的电路特性，二极体的特性实验，二极体的特性实验、电场力效应实验、电流天平实验、电流力效应实验、螺线管磁场实验、赫姆霍兹磁场实验、霍尔效应实验、法拉第感应电动势实验、感应线圈变压实验、微波实验一、微波实验二。

Japanese military leader General Hideki Tojo sent representatives to Washington, DC, to negotiate.

日本军事领导人东条英机派代表到华盛顿特区，进行谈判。

ABSTRACT Brushless DC Motor has become widely used in many fields of modern society for its high performance.

无刷直流电动机是一种性能优良的电机，在现代社会的各个领域得到了越来越广泛的应用。

In 1982, a jury in Washington DC found John Hinckley Junior innocent by reason of insanity in the shootings of President Reagan and three other men.

1982年，华盛顿的一个陪审团认定John Hinckley因精神错乱而在枪袭总统里根以及其他三人一案中无罪。

It is shown that 31% HOD can be reached, which have slight increase over those synthesized by the DC BEN.

从交流偏压大小及时间的变化之实验中发现2 % CH4/-200 50 V/21 min，可以得到31% HOD。

Head of housemate askes DC does he have anyone he likes??

张总管问东灿他是否有喜欢的人。

From the view of torque controlling strategy, the relation between the torque controlling strategy such as the electric current feedback method、 PWM open loop method etc and the vehicle driving way is analyzed firstly, then the conclusion could be drawn that the PWM open loop method has more advantages than the electric current feedback method when they are both used in the same vehicle which is direct driving by hubcap motor. Secondly, based on the electric motor mathematic model and its experiment, a new permanent brushless dc motor phase electric current detector method in which a digital signal processor and single current sensor are used is introduced.

从转矩控制策略角度来看，分析了电流反馈法以及开环PWM电压调速控制方法与车辆的驱动方式关系，得出了电机驱动电压受限的情况下，无论是从对车辆的动力性能影响还是从对车辆的驱动要求来讲，开环PWM电压调速控制方法较电流反馈法更适用于以轮毂电机直接驱动方式的两轮电动车中；其次，根据电机的数学模型以及电机试验波形，提出了一种利用数字信号处理器以及单个电流传感器检测三相永磁无刷电机电枢电流的新方法，这种方法具有较强的适应性、实时性，它可以根据控制系统的要求，适时地提供所需电流数据，是目前许多文章关于无刷电机相电流平波的重要技术基础。

Some valuable results are obtained in this dissertation, the most important are as follows:(1) The uncertainty in the determination of 〓Cs dc hyperfine polarizability constant κ is taken into account in the correction of blackbody ac Stark shift and it will bring out a fractional frequency uncertainty of about 4×10〓 to the correction.

本文还得到一些具有创新意义的研究结果，最主要的有：（1）我们首次考虑了直流极化率常数κ的测量误差对黑体辐射斯塔克频移修正误差的影响，经计算发现，由κ的测量误差导致的频移误差约为4×10〓，是黑体辐射斯塔克频移的主要误差来源。

It makes clear that the controlled objects of AC and DC motor systems are identical through vector transformation and current close-loop reconstruction.

本文研究了交、直流传动系统的统一控制策略，明确了经矢量控制变换以及电流闭环改造后的交、直流系统所面临的控制对象的一致性。

Lots of studys show that DC plays an important role in the process of anti-tumor immunoreaction response and oncological surveillance.

大量研究显示，树突状细胞在抗肿瘤的免疫反应、肿瘤监视等过程中均起到重要作用。

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。