证明钢轨在低频段是整体振动。
线谱噪声主要集中在自噪声的低频段。
The line noise is a primary low frequency component of self-noise in submarines.
它产生低频段的高振幅。
It leads to higher harmonics amplitudes in lower frequency range.
频响也会好一些，因为低频段有效阻抗不会下降。
The frequency response will be good as well, since there is no loss in effective impedance at low frequencies.
该无线电系统还可扩展频率范围，提供低频段甚高频。
The radio also has an extended range that provides access to low-band VHF.
低频段和高频段感音神经性耳聋的发生率分别为8%和42%。
The incidences of SNHL at low and high frequencies were 8% and 42% respectively.
特别是低频段部分，因为谱线数太少，会造成更大的计算误差。
Especially, in the lower frequency bands, the bigger calculation errors arise because of the few spectrum points.
通过直管噪声与带消声器的尾管声压级的对比，发现在低频段有一峰值。
We make a comparison in tailpipe noise between straight pipe and muffler, it is seen that there is a sharp peak in low frequent.
对于BJT／HBT器件，分别提出了高频段和低频段的参数提取算法。
To BJT/HBT device, the arithmetic, at its low frequency range and high frequency range respectively, are put forward.
将地球作接收引力波的天线物质，地球就成为了工作在低频段的引力波探测器。
Taken the Earth as material of antenna for receiving gravitational wave, the Earth behaves as a low-frequency gravitational detector.
低表面能涂层涂覆在铝合金模型上，考察了其在水筒中低频段降低流噪声的效果。
The flow noise reduction of al alloy model with low surface energy coatings have been studied in a water tunnel.
X波段固态功率放大器相对于较低频段的固态功率放大器，其稳定性问题更加突出。
Stability problem in X-band solid-state power amplifier is rather evident than other lower frequency solid-state power amplifier.
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.
实验结果表明该检测系统可有效地避开空间的电晕及周期性脉冲干扰信号等低频段干扰。
The results indicate that the UHF system of detecting PD can effectively detect partial discharge and avoid outer corona interfere and Periodic pulse interfere.
结论均匀呼吸的调息频率改变不仅影响HRV的高频段，而且还会影响HRV的低频段。
ConclusionsThe uniform respiration frequency affects not only high-frequency HRV, but also low-frequency HRV.
利用矢量传感器在低频段的良好特性，实现了小尺寸声阵条件下的高精度目标DOA估计。
With the perfect characteristics of acoustic vector sensor in the low frequency band, accurate DOA estimation is achieved with small array size.
饱和砂岩中扎隙液体的粘滞系数对饱和砂岩的衰减、模量和速度色散的影响在较低频段是明显的。
The viscosity coefficient of pore fluid in saturated sandstone has an obvious effect on the attenuation, modulus, and velocity dispersion in low frequency range.
这类新型谐振单元尺寸大大缩小，结构紧凑，为低频段的频率选择性表面阵列的实现提供了可能。
These new resonant cells are greatly reduced in dimensions and very compact in structures, so it is possible to realize the lower frequency selective surface.
饱和砂岩中扎隙液体的粘滞系数对饱和砂岩的衰减、模量和速度色散的影响在较低频段是明显的。
The viscosity coefficient of pore fluid in saturated sandstone has an obvious effect on theattenuation, modulus, and velocity dispersion in low frequency range.
计算结果正确预测出近场中低频段的指向性特点和远场声压级水平，与实测谱值有较好的一致性。
It has been verified that the directional characters in near sound field in low and middle frequency bands and the pressure level in far...
本文介绍一种将微波低频段分布参数电路与超微细薄膜工艺结合的微型化、低噪声、高选择性的放大模组。
This module of distributed parameters used in the lower microwave band is skillfully combined with an ultra-fine thin-film technology.
在微波暗室静区反射电平计算时常采用点源发射模型模拟天线的特性，它适用于低频段或方向性差的天线。
In calculation of reflected level of quiet zone in anechoic chamber, a spot emission model is often used to simulate antennas characteristic.
时域有限差分法将声波基本方程表示为一个时间和空间的迭代方程组，实现对室内声场中低频段的模拟计算。
The acoustical wave equation is presented a serial spatial and time iterative equations and room acoustics field is simulated using finite difference time domain method.
本文介绍了线性多变量系统分段设计方法——即将多变量系统按高频段和低频段分别设计出相应的子控制器。
A design method for Linear multivariable systems of high and low frequency region is introduced in this dissertation.
实验结果表明气动负载模拟器在低频段有较好的力跟随特性，尽管在气缸换向时有多余力的产生，但幅值较小。
The final results show that the performance of pneumatic load - simulator is satisfying, and the superfluous force, though there exists, is small.
带通滤波器经常用于抗干扰设备中，以便接收某一频带范围内的有效信号，而消除高频段和低频段的干扰和噪声。
Band-pass filter often used in anti-jamming devices, in order to receive a valid signal within the band, while the elimination of high frequency and low frequency interference and noise.
图2例示了多波段天线系统100，其表示在低频段中操作的多波段天线系统100中的导体元件102、104。
FIG. 2 illustrates the multi-band antenna system 100 showing the conductors elements 102, 104 in the multi-band antenna system 100 operating in a low frequency band.
结果通过血流多普勒信号的小波尺度图研究科室，发现利用小波尺度图可以眼科提高血流多普勒信号低频段的频谱分辨率。
Result Wavelet scalogram of blood flow ultrasonic signal had a higher distinguishability than STFT spectrogram in the low frequency portion, but had poorer decussation terms than spectrogram.
结果通过血流多普勒信号的小波尺度图研究科室，发现利用小波尺度图可以眼科提高血流多普勒信号低频段的频谱分辨率。
Result Wavelet scalogram of blood flow ultrasonic signal had a higher distinguishability than STFT spectrogram in the low frequency portion, but had poorer decussation terms than spectrogram.
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