双语例句原声例句
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提出了一种异步电机无速度传感器矢量控制的新方法，用瞬时无功功率和励磁电流变化来估计电机转速。
This paper proposes a new method of sensorless vector control for induction motors, in which the motor speed is estimated by both instantaneous reactive power and variation of magnetizing current.
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以F - 15战斗机为例，研究了失速及推力矢量对飞机瞬时转弯性能的影响。
Taking the flight parameters of F-15 fighter as analysis background, the affection of stall and thrust vector on instantaneous turning performance is studied.
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然后是三相四线制无功补偿发生器的理论基础（主要是瞬时无功功率理论和IGBT脉冲产生的空间矢量法）；
Thirdly, this paper introduces academic base used in this equipment , mainly are instantaneous Var power theory and Special Vector Method for generating pulse used springing IGBT;
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That limit will be some arrow we can call the velocity at the time and it will always be tangent to the curve.
那个极限也就是一个矢量,我们称之为瞬时速度,并且它总是和轨迹相切的
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The tangent's pointing towards the direction you are headed at that instant.
切线的方向就是,速度矢量在那个瞬时的指向
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