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- In the study of flow oscillation and discrete frequency noise of impinging jet, it is found that there is a critical pressure ratio for a given nozzle and a nozzle-to-plate distance. 发现对于给定的喷嘴和冲击距离,存在一个压比临界点,当压比高于此临界点值时,流场振荡和离散频率噪声被显著抑制乃至消失。
- 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。
- Applying Volterra functional series and discrete Fourior tansform (DFT) to the system, we can obtain the model of the system in discrete frequency domain. 应用Volterra泛函级数和离散傅里叶变换理论于非线性系统,本文给出非线性系统在离散频率域的模型。
- 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.
- Any of several devices that convert incident electromagnetic radiation of mixed frequencies to one or more discrete frequencies of highly amplified and coherent ultraviolet, visible, or infrared radiation. 激光器使偶然的混杂频率的电磁辐射，变为一个或更多的高度强化和连续的紫外线、可见光或红外线辐射的分离频率仪器中的一种
- 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。
- Only certain discrete frequencies are left without benefit of external stabilization due to the feed system. 只有某些个别的频率没有利用供应系统的外部稳定作用。
- 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。
- Synthesize of time domain wave form by summation of harmonics or sinusoidal wave form of discrete frequencies. 以离散频率之弦波合成时域脉波之波形。
- 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。
- 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。
- discrete frequency soft-starting 分级变频软启动
- 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。
- Any of several devices that convert incident electromagnetic radiation of mixed frequencies to one or more discrete frequencies of highly amplified and coherent ultraviolet,visible,or infrared radiation. 激光器使偶然的混杂频率的电磁辐射，变为一个或更多的高度强化和连续的紫外线、可见光或红外线辐射的分离频率仪器中的一种。
- The improvement on the edf for the higher frequency noise is better than that for the lower frequency noise in the overlapping estimators and the total estimators. 而相应的重叠估计和总方法估计与之相反，噪声的频率越高，其等效自由度越大，这也说明重叠估计和相应的总方法估计对高频噪声等效自由度的提高优于低频噪声。
