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.
电流变液是一种在电场下瞬时从液态变为类固态的智能材料。
Electrorheological (er) fluid is an intelligent of material that can be changed from liquid into solid rapidly in the presence of an applied electric field.
与干燥状态相比，泡水后软岩除了瞬时变形模量大幅度降低外，流变也很显著，这会对坝体应力带来明显的影响。
The deformation modulus decreases evidently and the nonlinear rheological property is more significant when the rock is immersed, which will affect the stress distribution of arch DAMS.
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