FREQUENCY OF ROTATION的意思|示意

The result also indicates that when the seasonal variation of the earth's rotation is around turning point, the frequency of large earthquakes in these regions becomes obviously high.

结果还显示，当地球自转的季节性变化处于转折期时，该地区大地震的频次明显增加。

The data of polar motion, rotation of the earth and atmospheric excitation function are analysed by the Auto-Regression power spectrum method, and their spectra at low frequency band are obtained.

本文用自回归功率谱方法分析了极移、地球自转和大气激发函数的资料，得到了它们的低频谱。

Three new aperture methods of speckle photography, one dimensional frequency modulated aperture method crossed aperture method and rotation aperture method are proposed.

本文提出了三种新的散斑照相孔径方法：一维调频孔径法，交叉孔径法和旋转孔径法。

The filter used a kind of general structure, whose central frequency located nearby the rotation speed to reduce the unbalance vibration.

该陷波滤波器采用通用式结构，其中心频率分布在转子转速附近以抑制不平衡振动。

Step motor control, by pulse by changing the order of electricity can change the motor rotation direction, change the pulse frequency can change the motor rotation speed.

步进电机受脉冲的控制，通过改变通电的顺序可改变电机的旋转方向，改变脉冲的频率可改变电机的旋转速度。

The use of frequency convert to regulate the speed of rotation according to the character of mine fan can reach the goal of the modulation of air flow and have a very good effect of saving energy.

根据矿井通风机的特性，使用变频器进行转速调整以达到调节风量的目的，且有很好的节能效果。