反位置

The tanks moved back up to 1.500 meters from the positions in order to avoid the antitank fire.

坦克纵队后退到1500米位置以避开反坦克炮的火力。

In addition, they towed and transported machine-guns, mortars, and 45mm antitank guns to firing positions.

此外，它们还要运输或牵引机枪，迫击炮，45MM反坦克炮到达相应的作战位置。

According to the fundamental of vector control,a digital closed-loop control system of permanent magnet synchronous motor based on dsPIC30F6010 was designed and a model of permanent magnet synchronous motor in the estimation two phase rotating reference frame was introduced and an extended back electromotive force equation was deduced.

根据永磁同步电动机矢量控制的基本原理，设计了一种基于 dsPIC30F6010的无位置传感器永磁同步电动机控制系统，并介绍了在估算两相旋转坐标系下的PMSM模型，推导出了反电势方程的扩展形式。

On the base of roundly analyzing and studying the running mode of the sensorless BLDCM, we explain theories and realizable methods of detecting back electromotive force, phase verdict and phase compensation in detail.

在全面分析研究了无位置传感器无刷直流电动机运行方式的基础上，细致阐述了反电势过零检测、相位判断及相位补偿的原理及实现方法，并且为了在较宽的范围内提高BLDCM的调速性能，采用了数字式转速闭环控制。

When a rotating voltage vector is injected to the motor at standstill, there is a microinching when the voltage phase is line to the direct axis of the motor. Then the current will decrease due to the back electromotive force. The initial mover position is identified by this change.

电压相位和电机直轴重合时，产生的电磁推力超过负载阻力，电机有一微动，由于反电势的作用电流就会降低，通过检测电流矢量的变化来估计动子的初始位置。

Johan Cruyff, in the kind of backhanded compliment at which he excels, says:"He can't play football at all, he's just always in the right position".

克鲁伊夫曾经用反语称赞过他的过人之处："他一点都不会踢球，他所做的仅仅是总是能出现在正确的位置。"

The structure and characteristic of the band-pass filter are analyzed,and parameters of components are calculated,and a Back-EMF zero-cross detection circuit for BLDC motor sensorless control is designed in this paper.

分析了带通滤波器的结构、幅频和相频特性，计算获得了符合要求的参数，设计了由带通滤波器构成的无刷直流电动机无位置传感器控制用反电动势过零检测电路，并给出了该检测电路的简化型式。

Because of taking only advantage of the first item in scattering series, method of Born approximation inversion is only suitable to little disturbance imaging. And it will produce great error in condition of great perturbation.

考虑到上述问题，本文在Bleistein和Cohen等人对Born近似的深入研究基础上，运用地震逆散射理论进行深度成像，反演地层奇性界面的位置。

According to the notice, members should "guide" read into the client account opening process known links, and business department, and other prominent positions to be put up and do a good job related to the implementation of counter; members should be customer management, such as links to guide individual investors Conscientiously abide by the "guidelines" and establish "caveat emptor" the idea of participation in a rational investment.

根据通知，各成员应"引导"到客户开户环节的过程称为阅读，和业务部门，以及其他显着位置，设，并做好有关执行反；成员应客户管理，如链接，引导个人投资者自觉遵守"准则"，建立"买者当心"的理性参与投资的想法。

To change your current directory, type " cd " in the command box, press your " Space " key, and enter the full directory where the Fast Antivirus 2009 DLL file is located.

若要变更您的当前目录，输入" cd "命令中，按您的"空间"键，并输入完整的目录下的快速反病毒2009年DLL文件的位置。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。