您要查找的是不是：
- Impact in power frequency variation. 频率变化之影响。
- Application of frequency variator in roots blower 变频调速在罗茨鼓风机上的应用
- ADOPTION OF FREQUENCY VARIATOR ON MATERIAL DISTRIBUTION DISC FEEDER 变频器在分料圆盘给料机上的应用
- Frequency variation process and unit's swing process after fault can be closely simulated. 故障后的频率变化和机组摆动过程可确切地仿真。
- Power conditioning is used to minimize voltage and frequency variations in an external power. 电源调节用来最小化外部电源的电压变化和频率变化。
- The correlation between frequency variations of enzyme bands and tree height, DBH and volume was very small. Only B45 band came up to or closed significant level. 酶带频率变异与树高、胸径、材积生长相关性很小,只有B_(45)酶带与生长相关达到或近于显著水平。
- Digital filtering technique based on least square method, multichannel sampling technique and frequency variation sampling technique were used experimentally. 实验应用了基于最小二乘法的数字滤波技术、多通道采样技术、变频率采样技术。
- In the second design, we use an adaptive biasing circuit to compensate for process and temperature deviation.Even in the worst case, the frequency variation is under 5%. 在第二个设计中，我们使用一个适应性偏压电路去补偿制程跟温度造成的频率漂移，即使在最差的条件下，频率漂移还是可以维持在5%25以内。
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- Speed control by frequency variation 变频调速
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- relative frequency variation rate 相对频率变差率
- scheme of stator frequency variation 定子变频方案
- Speed Regulation by Frequency Variation 变频调速
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- He tuned his radio to the police frequency. 他把无线电调到警方的频率。
- frequency variator 调频器
- The frequency variation at the change of input speed 输入转速变化时的频率变化
