The sensorless of induction motor field-oriented control employing stator voltages and currents has difficulty in estimating rotor flux in the low-speed range.
在低速范围内，对无传感器感应电动机进行矢量控制时用定子电压和电流推算转子磁通是比较困难的。
The low value range of Y-ray spectrometry covers 75% of the area of known oil field.
能谱测量的低值区范围与已知油田在本区的面积重合率达75%。
In low field range, the change of current with time can be simulated by attenuation of power index, and the attenuation coefficient intends to decline with the increase of the applied electric field.
在低场范围中，电流随时间的变化，可以是模拟的幂指数的衰减，并与所施加的电场的增加的衰减系数拟下降。
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