查询词典 ac

The performance of AC variable speed drive system has been improved greatly since field-oriented control is applied.

矢量控制使交流调速系统的性能产生了质的飞跃。

I don't take much ac count of myself, but I have never let myself be duped.

我不大考虑我自己的利益，可是我也从来不肯受骗。

Milan's talismanic midfielder Rino Gattuso has shown Inter plenty of respect ahead of this weekend's derby, telling the Press he would be happy with a draw.

AC米兰的中场护身符加图索表达了对国际米兰的很大尊敬，在本周末的德比之前，告诉记者，他将与一场平局感到满意。

Based on the rigorous analysis of the kinetic process of both primary and secondary electrons, the related surface charges were analyzed, and the energy gain of emitted electrons was proportional to the square of the ratio between the tangential and normal component of electric field. In this process, the image force of mirror charges would result in an energy loss. Meanwhile, the effect of field alternation of power frequency ac voltage on electron movement could be ignored.

在前人工作的基础上，进一步严格推导了场致一次发射电子和二次电子的运动方程，分析了电子发射引起的绝缘材料表面带电，表明电子发射后的能量增益正比于场强的切向与法向分量比值 F /// F ^的二次方；同时考虑了在电子发射和运动过程中电荷镜像力的作用，并探讨了交流电压下表面带电的情形，认为当考虑电荷镜像力的作用时，电子的能量增益可能变小，而工频交流电压下电场交变对电子运动的影响可以忽略。

In the downstream, a sudden expansion microchannel with asymmetric pairs of microelectrodes is designed. The multi-electrodes are formed beside the expansion microchannel and result in the trap of micro-particles. AC electric potentials are applied to each pair of asymmetric electrodes creating a non-uniform electric field. The tangential component of the field produces a force on the induced charges in the diffused double layer.

此外在扩张管道上采用一种可调控式的微粒子撷取装置，主要是在扩张管道的侧边镀上多对的电极，利用电极间电场所引起的局部的电渗流(Electro-Osmotic Flow， EOF)和轴向压力驱动流彼此间相反的运动方向，进而在管道壁面电极区间产生回流区。

To solve the problem, a method used to analyze the proximity effect in rectangular loss transmission line is proposed and applined in full transverse electromagnetic frecuency Additionally, AC resistances are calculated to correct the parameters in telegraphist's equation, so it is feasible to do transmission characteristics analysis in wide band.

针对传统磁准静态方法无法进行高频段邻近效应分析的缺陷，提出一种可适用于横电磁波下整个频段的矩形有损传输线邻近效应分析方法，并推导了邻近效应影响下的交流阻抗，进而对电报方程的阻抗参数进行修正，为宽频域信号传输特性分析提供了新思路。

When mixed into the same carbon fiber quantity is 1.0%, differ age material's AC impedance chart is discrepancy very much, along with to hydrate age's add, C-S-H gel isa great deal of form, the solution resistance at the concrete is gradually aggrandizement, the carbon fibre of here qua transmit electricity quality disperse would leading effect of conductance, along with the add of exterior load, the transmit electricity quality of concrete is almost nothing change, till breakage, resistance change rate tempestuousness add, and that the resistance change rate along with inside stress linearity add of corbon fibre concrete in elasticity phase, when near peak value load, resistance rate just gradually add, indicate the test sample would be about to breakage.

当碳纤维体积掺量同为1.0%时，不同龄期材料的交流阻抗谱相差很大，随着水化龄期的增长，C-S-H凝胶大量形成，水泥基材料中的溶液电阻逐渐增大，此时作为导电性分散相的碳纤维将起电导的主导作用。随着外部荷载的增加，基准水泥基材料的导电性几乎无变化，直到破坏时，电阻变化率剧烈增大，而碳纤维水泥基材料在弹性阶段其电阻变化率随内部应力线性增加，当接近峰值荷载时，电阻率才逐渐增大，预示试件即将破坏。

On the base of analyzing the principle of AC motor speed control by terminal voltage in details, the simulation model of MATLAB/Simulink was set up.

在对异步电动机调压调速控制的基本原理进行充分分析的基础上，建立了异步电动机调压调速控制系统的MATLAB / SIMULINK仿真模型。

On the base of analyzing theprinciple of AC motor speed control by terminal voltage in details,the simulation model of MATLAB/Simulink was set up.

在对异步电动机调压调速控制的基本原理进行充分分析的基础上，建立了异步电动机调压调速控制系统的MATLAB/SIMULINK仿真模型。

AC motor speed control by terminal voltage with feedback is quite useful for pump machines.

带反馈的交流调压调速系统适用于风机、水泵等负载。

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。