您要查找的是不是：
- blade passing frequency noise 旋转噪声
- At the large flow rate condition, the blade passing frequency is also dominative in the pressure fluctuations, but at the small flow rate condition the rotation frequency becomes dominative. 在大流量工况下，隔舌处和隔板起始端压力脉动频率以叶片通过频率为主，而小流量工况下以叶轮转频为主。
- Experimental results show that under the effect of the rotor wake, the dominant frequencies of pressure fluctuations on stator blades are the rotor blade passing frequency (BPF) and its harmonics. 实验结果表明：在转子尾迹的影响下，静子叶片表面的波动频率是转子的尾迹频率及其倍频。
- Investigation on the characteristics of blade passing frequency of axial flow compressor at near stall conditions 轴流压气机近失速状态叶片通过频率特性研究
- blade passing frequency 翼通过频率
- By development of the MWE features we can achieve reductions of blade pass noise of 7dBA across the map with no impact on aerodynamic performance. 改进扩压流量槽的结构能降低7分贝的噪音且不影响空气动力性能。
- While hunting on the3) seabed they emitted a4) weird5) medium frequency noise. 在海底猎食时，们发出一种奇怪的中频率杂音。
- While hunting on the 3)seabed they emitted a 4)weird 5)medium frequency noise. 在海底猎食时，??欠3.;鲆恢制婀值闹衅德试右簟
- While hunting on the seabed they emitted a weird medium frequency noise. 在海底猎食时，它们发出一种奇怪的中频率杂音。
- The criterions of high frequency noise,background noise and reduce coefficient were presented. 导出了原子光谱高频噪声判据，背景噪声、压缩系数关系判据；
- Use of high loss ferrite material for excellent high frequency noise absorption. 使用优质高衰减铁氧体磁芯提高高频噪音隔离.
- In sound recording,a low frequency noise usually produced by regular variations in the speed of a system's mechanical component. 录音技术中的一种低频噪声，通常由于系统机械部件的速度有规律变化而引起。
- By using this method, the impact on depressing the partial vibration and the radiation of the low frequency noise of the structure underwater is efficacious. 采用增大局部结构刚度的方法，对于降低水下结构的局部振动与低频噪声辐射效果显著。
- In sound recording, a low frequency noise usually produced by regular variations in the speed of a system's mechanical component. 录音技术中的一种低频噪声，通常由于系统机械部件的速度有规律变化而引起。
- Helmholtz resonator has a good noise eliminating performance at low frequency.So it has been widely used on low frequency noise reduction. 摘要亥姆赫兹共振腔具有良好的低频消声性能，被广泛地应用于低频消声方面。
- The large C1 cap rolls off the gain of the regulator starting at a low frequency so that high frequency noise isn't amplified by the error amp. 这个大的电容C1从一个较低的转折频率开始滚降，所以高频噪音没有被误差放大器放大。
- His interest in photography is only a passing fad. 他对摄影的爱好仅是一时的兴致。
- Then the supersonic ejector is used,the high frequency noise will take place when the pressure in store tanks decreases to a specific value,and the environment of . 但使用超音速引射器后,当球罐压力下降到某一值时会产生高频噪声,影响管束区操作环境。
- The invader thrust the blade of his bayonet into the woman's heart. 侵略兵把刺刀的刀身刺入那个妇人的心脏。
- The results show that WT is an effective method by which high frequency noise and baseline drift in NEMG can successfully be eliminated by selecting proper transform scales of WT. 结果表明，在应用小波变换处理NEMG信号过程中，只要适当选取变换尺度就可以在处理信号的同时，有效地消除原信号中高频噪声和基线漂移的影响。
