查询词典 Ac

Starting from the steady-state performance of three-phase fully-controlled rectified circuit, which is with large inductive load, we take the front two items of the Maclaurin series of the DC voltage average as approximate formula, with considering of the effect of the AC-side inductance first, and further effect of AC resistance on DC voltage and commutation angle.

本文从带有高感性直流负载的三相全控整流电路稳态工作的物理情况出发，首先考虑了交流侧电感的影响，进而考虑交流侧电阻对直流电压、换相角的影响，将直流电压的平均值用麦克劳林级数表示，取前两项作近似，得出了实用的解析计算公式，并给出了计算步骤，实验证明该结果具有较高的精度。

The playback or recording heads of a magnetic tape recorder or player have been demagnetized heretofore with an electrical unit which plugged into a suitable 110-volt AC current source and had pole pieces which were passed closely adjacent and across the surface of these heads and then slowly withdrawn to allow the influence of the AC field to die away gradually.

淘宝上的买家都是专家，都是测试了使用效果之后才给好评的啊？俺在淘宝淘了这么多东西，只要按时收到了东西，没坏，没烂，跟照片一样，就给好评了哦！照你这么说，你在淘宝买个录音机的是不是都得实际测试了所有指标跟出厂指标一致之后才给好评啊？

According to the mathematical model of AC induction motor,the static measurement of electrical parameter for AC is achieved by pulse method.

文章根据异步电机的数学模型，采用脉冲法实现了电机基本物理参数的静态测试。

The measurement calibration service for ac voltages in the millivolt ranges was previously provided only in the frequency range from 40 Hz to 10 kHz, where suitable calibrated ac voltages were produced by means of an inductive voltage divider.

为在毫伏范围内交流电压服务的计量校准只由从40赫兹至10千赫的频率提供，在这个频率范围内交流电压的合适校准是由归纳分压器的方式产生。

The RMS—to—DC transformation is used for collecting virtual value of Ac. The voltage election elects the range of voltage. The analog—to—digital transformation realize transformation of measured voltage to corresponding digital figure. Finally the Sample Digital Display Ac Millivoltmeter is obtained.

其中RMS/DC专用芯AD637用来采集交流有效值转换，电压范围选择模块选择电压量程，模数转换使测量电压转换，最终得到所要求的数字显示交流毫伏表。

AC-DC-AC drive technique ; locomotive ; motor coach ; asynchronous traction motor ; radial bogie.

交－直－交传动技术；机车；动车；异步牵引电动机；径向转向架

This controller can be used not only in ordinary AC motor-driven,it can also drive ordinary AC motor in a small frequency range.

这种控制器不但可用于一般交流变频电机的驱动，也可以在小频率范围实现对普通交流电机的驱动。

The simple half wave rectifier can be built in two versions with the diode pointing in opposite directions, one version connects the negative terminal of the output direct to the AC supply and the other connects the positive terminal of the output direct to the AC supply.

简单的半波整流可生成两个版本指向相反的方向，二极体、一个版本连接到交流电源负极的直接输出和另正直接输出的终端连接到交流电源。

In this study the maize transposable element Activator was introduced into Nicotiana tabacum L cultivar Nc89 and its haploid.

本研究把玉米转座因子Ac分别转化烟草二倍体和单倍体，研究Ac在这两种细胞中的转座行为。

Analyzed the hereditary variation distribution of amylose content in DH population, estimated hereditary capacity and rate over parent in DH population by the model and formul which were presented by Choo and Reibergs, and examined the number of gene pairs and the pattern of gene interaction which controlled these characters.

应用Choo和Reibergs提出的模型及公式，分析了这6个DH群体AC的分布、测算了遗传力、超亲率，检测了AC的基因对数及基因互作方式。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。