低频

The complexity of vector quantization is reduced by 76 percent by the replacement of calculating of the whole distortion with distortion of a part of components,using the interband correlation,the complexity of motion compensation is diminished considerably by the prediction of motion vector of the other subimages with the motion vector in the lowest frequency subimage.

利用子带间的相关性，通过同方向跨带矢量中部分低频系数分量间失真的计算代替整个失真的计算，将矢量量化器的计算复杂度降低了76‰；通过最低频子图像的运动矢量去预测其余子图像的位移矢量，极大地降低了运动补偿的复杂度。

These drivers are biamped with a 250-watt LF amplifier and a 120-watt HF amplifier, which provides, according to JBL, a-flat +1 dB/-1.5 dB response from 50 Hz to 20 kHz, with a low frequency extension all the way down to 36 Hz.

这些驱动程序biamped与250瓦低频放大器和1 120高频放大器，提供瓦，据JBL，一坪从50赫兹1 dB/-1.5分贝至20千赫的反应，具有低频扩展名的所有一路至36赫兹。

The geothermal reservoir and cap rock were interpreted.

利用北京大学研制的BD-6型被动式超低频电磁探测仪在京热119井和168井附近布点探测，在探测过程中利用硬件滤波和水平旋转探头方向的方法消除了工频50Hz的部分谐波干扰，同时探测曲线的重复性也非常好，得到了相应井位的超低频电磁探测数据。

The lower apparent resistivity of geothermal area is the result of water and the difference of resistivity between the geothermal area and wall rocks can be detected by using passive SLF electromagnetic explorer, and then the interface between the geothermal area and cap rock and the depth of the area of lower resistivity are derived.

分析了深部地热资源勘察中的地球物理电磁法应用现状，阐明了被动式超低频电磁法在深部地热资源勘察中的可用性和优势；重点论述了被动式超低频电磁法在深部地热资源勘察中的探测机理。

When the digitalsignal carries on the long distance transmission, the high frequencycomponent weaken increases along with the distance increases, theelectric cable median line also advances to the betweenelectromagnetic radiation along with the frequency intensifies, thusthe clipped wave transmitting range and the transmission quality,simultaneously in the channel often also exists separates the directcurrent electric capacity and the coupling transformer, they cannottransmit the direct component and have a bigger weaken to the lowfrequency component, therefore high frequency and low frequency arepartial regarding the common channel is limited.

当数字信号进行长距离传输时，高频分量的衰减随距离的增大而增大，电缆中线对之间的电磁辐射也随着频率的增高而加剧，从而限制信号的传输距离和传输质量，同时信道中往往还存在隔直流电容和耦合变压器，他们不能传输直流分量及对低频分量有较大的衰减，因此对于一般信道高频和低频部分均是受限的。

And the westward ISO is usually the low-frequency low and high pressure systems from the Bay of Alaska in northeastern Pacific and the Okhotsk in the northwestern Pacific of mid high latitudes, and the ISO evolving in subtropical easterlies.

进一步分析发现，经向风ISO的纬向传播对应着大气经向型环流系统的移动，向西传影响东亚夏季风区降水的ISO有来自低纬中东太平洋东风流中的低频气旋（如副热带东风带中ISO的演变）；也有来自中高纬度阿拉斯加湾及鄂霍次克海一带低频低压和高压(如阻塞高压和东北太平洋高压)的向南向西频散。

With the development of electrical technology, the possible health hazard of exposure to ELF fields has become an issue of considerable public concern, particularly, the association between exposure to ELF fields and the risk of cancers.

随着电力事业的发展和家用电器的日益普及，极低频电磁场的健康危害已经引起公众的广泛关注，尤其是极低频电磁场暴露与肿瘤的危险度关系。

Increasing the length may enhance the gain of low and high frequencies when external acoustic meatus is wider, but only low fiequecies when narrow.

结论当外耳道较为宽大时，增加声管的长度可以提高低频和高频的增益；当外耳道较为狭窄时，增加声管的长度仅能提高低频的增益。

The printed UWB antenna is comprised of a planar monopole radiator and the ground plane which are connected to a coaxial cable to launch RF signals. This kind of ground and antenna system is essentially an unbalanced design, where electric currents are distributed on both radiator and ground plane, and then leakage to the outer conductor of the feeding cable. The impedance matching and radiation pattern will be influenced in the low band, which are our focus. Finally, some techniques will be proposed to reduce the cable effect on the antenna performance.

进行超宽频天线量测时，吾人会利用同轴缆线连接到网路分析仪，这时的同轴缆线不只是扮演一个传输讯号的工具而已，由於单极天线的不平衡结构，对低频而言，接地回流电流会泄漏到同轴接地的导体外部，造成同轴缆线也是一个辐射体，影响到天线低频时的阻抗匹配与辐射特性，因此本论文将探讨同轴缆线对於天线一些参数的影响，并研究提出解决的办法。

Related to the issue above, large excursion woofers often have poor bass extension and require active EQ to get a reasonable bass response.

巨大冲程的低音喇叭通常有很差的低频延伸，需要有源EQ均衡电路来获得合理的低频响应。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失