查询词典 alternating current

Transient and surge are the instant aberrance of the voltage and electric current on the simple alternating current wave circuit.

瞬变和浪涌是正弦交流波电路上电压与电流的一种瞬时态的畸变。

It is possible to convert alternating current to direct current.

把交流电转化成直流电是可能的。

Aluminium foil of different purity was etched by chemic and alternating current method in this dissertation,and we find that alternating current method excels.

本文采用不同纯度的铝箔，对其进行化学腐蚀和交流电腐蚀，结果发现铝箔的交流电腐蚀要优于化学腐蚀。

For example: a 12V AC power supply has an alternating voltage (which will make an alternating current flow).

AV 的电源提供一个交流电压(将产生一个交流电流流动)。

In Chapter 2,the polarization and loss mechanism of fruit in the alternating current arestudied,and dielectric parameters such as dielectric constant、equivalent impedance andequivalent capacitance are put forward to analyze the interaction between fruit internalquality and alternating current.

第二章 研究了水果生物介质在交变电场作用下的极化和损耗机制，提出了复介电常数、等效阻抗及等效电容几个相互联系又有所区别的电特性参数是研究交变电场与水果相互作用的基本参数。

One of these testing methods, eddy current, has been widely used for metal thickness measuring because of its good sensitivity, high test speed , non-contact and other advantage. The principle of eddy current testing is that, when the test coil is close to the metal conductor with alternating current, the eddy current would be inducing in the conductor, and correspongdingly, the eddy current would affect the original magnetic field, the result is the coils impedance and inducing voltage changed.

其中涡流无损检测技术具有灵敏度高、检测速度快、非接触等特点而广泛应用于金属厚度检测，它的原理是当载有交变电流的检测线圈靠近金属导体时在导体中产生涡流，该涡流又影响原磁场，使得线圈的阻抗和感应电压发生变化，通过分析阻抗或感应电压的变化来获得被测导体的信息。

The welding of end ring of alternating current machine and the conducting bar is the key technology for manufacturing of asynchronous traction motor with high power. China South Locomotive and Rolling Stock Industry Corporation had taken this significative study as a key project for the manufacturing of alternating current machine. According to the welding of end ring of alternating current machine, the welding of copper and copper alloy is described in this paper. Results obtained in this study are as follows. 1.By the comparison of oxyacetylene gas brazing, induction brazing and resistance brazing, it was found that high-quality welding joint could be obtained by induction brazing, which also had the highest efficiency.

交流电机端环与导条的焊接是大功率异步牵引电动机制造的一项关键技术，开展其焊接工艺研究具有重要的意义，中国南车电机公司将此课题作为解决交流电机制造的一个重点项目，本文结合交流电机转子端环焊接的课题，对铜及其合金的焊接进行了研究，主要研究结论如下： 1、通过氧乙炔火焰钎焊、感应钎焊、电阻钎焊等焊接方法的对比试验发现感应钎焊可获得优质的焊接接头，且感应钎焊的焊接效率也是最高的。

By using the measure and research of the emulating two-port network parameters of using direct-current analysis and figure value output function of sinusoidal steady state circuit in circuit emulating sofeware PSPICE8.0,the measune and reseavch have solved the problem of the measuring purely resistive network of simple and odd one in traditional experimient,and also brought about the analysis of alternating current and direct-current for two-port network of any one complex and measure and research of Y、Z、T、...

利用电路仿真软件PSPICE8.0中直流分析及正弦稳态电路的数值输出功能仿真二端口网络参数的测量与研究，解决了传统实验中只能测量简单、单一的纯电阻网络问题，实现了对任一复杂二端口网络交、直流的分析及Y、Z、T、H等参数的测量与研究，为更多的不易完成的传统实验以及复杂电路的分析研究开辟了一条新路。

The socket structure is provided with a zero phase trigger control unit, through the photoelectric sensing element of the unit, optical coupling can be performed to generate zero phase trigger, and the opening or the closing of a two-way thyratron in the zero phase can be accurately controlled, therefore, an electric device inserted on an output socket can be started or stopped from the zero phase, in order to reduce the electromagnetic interference and prolong the service life of the electric device, the use efficiency of the electric device can be enhanced, the power supply thereof can be saved, filtering and rectifying can be performed through a current switching unit when the alternating current power supply passes through a filtering and rectifying circuit, the noise caused by external interference and affect can be filtered, and the power supply can be respectively transmitted to a current detecting socket and the input end of the current switching unit to be detected through a temperature sensor arranged on the current switching unit.

本实用新型为有关一种插座结构，尤指为设有零相位触发控制单元，可通过其光电感测元件来进行光耦合而产生零相位的触发，且可准确控制双向闸流阀在零相位的开启或者关闭，进而达到插置于输出插座上的电器装置从零相位开始启动或者关闭，以降低电磁干扰而延长电器装置使用寿命，且可提升电器装置的使用效率及节省电源，并通过电流转换单元于交流电源通过滤波整流电路进行滤波整流，可滤除外部所干扰影响的杂讯，并分别传送至电流侦测插座及电流转换单元的输入端，而可通过电流转换单元所设置的温度感应器来进行侦测，于电路温度升高时，温度感应器可进行切断双向闸流阀的电源输出而达到保护输出插座上所插设的电器设备。

The problems of direct current drive system of finishing mill group in wire production line are raised in this paper, and the key to solving the problems is that taking alternating current requency control system instead of direct current drive system is discussed.

针对某钢铁公司第三型钢厂线材生产线精轧机组原直流传动系统存在的问题，通过技术论证，采用交流变频调速系统取代原直流传动系统，不仅使传动系统故障率大为降低，而且产量也大大增加。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。