研究人员指出，低频过程诸如河流流量和地下水水位的波动，通常不会对人类产生明显影响。
The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations.
文章根据波动声学的观点对房间内的低频段声场做分析，理论和实验都验证了这个结论。
Based on wave acoustics, the low frequency sound field is analyzed in this paper, and reciprocity is verified both theoretically and experimentally.
在大气动力学领域，主要介绍了非绝热波和大气低频动力学、湍流的频散效应和大气非线性波动等方向的研究进展。
First, in the field of atmospheric dynamics the developments in dynamics of diabatic waves and low frequency waves, the dispersive effects of turbulence and nonlinear atmospheric waves are reviewed.
在小尺度封闭空间内，声波低频成分的波长与空间尺寸相当，声音在传播过程中所发生的散射、衍射等波动现象不容忽视。
Because of wavelength of sound at low frequencies being close to the dimensions of small enclosures, scattering and diffraction in the course of sound radiation can not be ignored.
采用齿谐波低频调制的设计方法，来削弱直线电机固有的端部效应，使推力的波动减小，并进行了多方案计算，得出比较好的设计方案。
The low-frequency slot harmonic modulation is used to weaken the end effect or decrease the wave of the thrust, and the many projects are designed or the better project is selected.
与风机负荷的波动相关，风机转子的角速度变化及相伴的低频拍振是不可避免的。
Because of oscillation of the blower load the variation of angular velocity of the blower rotor and beats in lower frequency are inevitable.
半导体激光器在适度光反馈条件下，在数值上研究出其低频波动区域的动态特性。
Dynamics of a semiconductor laser subject to moderate optical feedback operating in the low-frequency fluctuation regime is numerically investigated.
HRV频谱中低频和高频成分的比值（LF/HF）随着睡眠深度的变化而波动。
The ratio of the low frequency to high frequency components in HRV power spectrum(LF/HF) fluctuates with the change in the sleep stages.
正偶(单)极强迫源对大气低频振荡的调制作用强于负偶(单)极，波动振荡明显加快。
The frequency modulation effects of positive dipole (unipole) forcing source on LFO is stronger than negative dipole (unipole), and the wave oscillation quicken evidently.
传统的价量分析都是从低频数据来分析股票市场上波动率、收益率与成交量之间的关系。
The traditional methods to measure the relationships among return, volatility and trading volume are base on the low-frequency data.
能模拟出低频运动并有助于建立和维持赤道洋流系统的波动有着特殊的意义。
Of particular interest are waves that simulate low-frequency motions and that help to establish and maintain the equatorial current system.
结果显示，青海南部高原地区春季最高气温的变化存在较明显的31~54年低频和2~4年高频准周期波动特征。
The result shows that there exist pronounced lower-frequency periodicities of 31~54 years and higher-frequency variations of 2~4 years.
结果显示，青海南部高原地区春季最高气温的变化存在较明显的31~54年低频和2~4年高频准周期波动特征。
The result shows that there exist pronounced lower-frequency periodicities of 31~54 years and higher-frequency variations of 2~4 years.
应用推荐