Thus research has been going on for some time in the area of low frequency active (LFA) towed array sonar.
如此研究一直在低频率活跃的 （LFA）被拖的排列声纳的区域中继续有一些时间之久。
Signal is in low frequency, while noise in high frequency and minutia in image is also in this area.
信号主要分布在低频区域，而噪声主要分布在高频区域，同时图像的细节也分布在高频区域。
The backwashof low frequency, high compressive strength, no powder, no hardening, high activity and large specific surface area, good regeneration effect.
反洗频率低，抗压强度高，不粉化、不板结，比表面积大，活性高，再生效果好。
The simulation results were: (1) under simulation scenario without harvest, the fire regime was characterized by low frequency, high fire severity and large fire damaged area;
研究结果如下：（1）在无采伐预案下，火干扰模式为低频率大面积高强度火烧；
In domestic AC interconnected area power grids the low-frequency oscillations still exist due to insufficient damping.
在我国大区交流互联系统中存在着区域间弱阻尼或负阻尼低频振荡问题。
In the area where call frequency is low, we will redress or unite call area to reduce the switch in the different areas.
对话务量较低的区域采取调整或合并呼叫区的措施，来减少不同呼叫区之间的切换。
It was the most excellent representative of the low microwave dielectric ceramic materials, which can be developed as filters and resonators using in the microwave frequency area.
它是低类微波介质陶瓷材料的最优秀的典型代表，可作为滤波器、谐振器上的介质材料应用在微波范围。
This controller's input signal is the voltage phase Angle difference between two areas obtained by PMU, which can effectively reflect the inter-area low frequency oscillation characteristics.
该控制器以PM U得到的区域间电压相角差信号作为输入信号，能够直接有效地反映区域间低频振荡特性。
On the low-frequency parameters of speaker is analyzed, draws the affecting relation of strengthening rib and equivalent compliance , effective vibration area of diaphragm.
分析了膜片加强筋的筋脉、剖面形状、面形状、角度等对扬声器低频参数的影响，得出了加强筋与膜片等效顺性以及有效振动面积之间的关系。
Small rainfall events mainly benefited herb species, and the high frequency but low amount of rainfall partially explained the relatively high vegetation cover in this area.
综合考虑降水模式与不同生活型植物对小雨量降水的响应特点，高频率的小雨量降水，可能是维持本区较高植被覆盖度的重要原因。
The characteristic of selecting frequency of lines is analyzed based on distributed parameter circuit theory. Then, the resonance mechanism of low frequency in wide area is proposed.
利用线路的分布参数电路理论，分析了线路的选频特性，提出了广域系统低频振荡的谐振传播机理。
The characteristic of selecting frequency of lines is analyzed based on distributed parameter circuit theory. Then, the resonance mechanism of low frequency in wide area is proposed.
利用线路的分布参数电路理论，分析了线路的选频特性，提出了广域系统低频振荡的谐振传播机理。
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