低频

Compressional waves and shear waves mainly cause high-frequency (greater than 1 Hertz) vibrations which are more efficient than low-frequency waves in causing low buildings to vibrate.

纵波和横波主要形成大于1赫兹的高频震动，相比低频震动，这类波更容易造成低层建筑物的震动。

This paper analyses the electromagnetic radiation with very low frequency caused by the power-supply wiring of household appliances.

本文讨论了家用电器馈线所产生的&特低频电磁辐射&问题。

The text below will teach you how to measure the very low frequency.

下面就以实例说明如何测量超低频波形的方法

To coordinate the movements of groups who are out of sight, elephants and whales use very low frequency sounds that circumvent obstacles and carry over long distances.

为了联系视线范围外的队伍，大象和鲸用可以穿越障碍，长距离传输的低频声音。

The measures for decreasing the low frequency noise, especially the surface 1/f noise, are used for mask pattern design.

在版图方面主要考虑了降低低频噪声，尤其是降低表面1/f噪声的措施。

Radio Frequency Identification System BE make use of RF energy to deliver data,belong to a wireless communication technique,is 1 kind not the system of contact type,it constitutes the component contain the application system of the reader,electron label,Antenna,host computer, its induction method depends on passive type Tag with active type Tag distinguish analyse, can be divided into induction coupling and back scattering coupling and induced the coupling is the induction method (as 135 KHzs、13.56 MHzs) which belongs to low frequency、high frequency,the back scattering coupling is the induction method(as 915 MHzs、2.45 GHzs) which belongs to superhigh frequency,microwave, and what we construct apply system is use the high frequency 13.56 MHzs of induction coupling method.

中文摘要无线射频辨识系统(Radio Frequency Identification；RFID)是利用RF能量来传递资料，属於无线通讯技术，是一种非接触式的系统，其组成元件有读卡机、电子标签、天线、主电脑应用系统，其感应方式依被动式Tag和主动式Tag来区分，可分为感应耦合和反向散射耦合而感应耦合是属於低频、高频的感应方式(如135KHz、13.56MHz)，反向散射耦合是属於超高频、微波的感应方式(如915MHz、2.45GHz)，而我们所建构的应用系统是使用高频13.56MHz的感应耦合方式。

The extrema of the seismic data are used to get the modulation function which operated with the original seismic data to get the high frequency part of the reconstruction data to rebuild the wide band data.

该方法利用地震资料极值点得到的调制函数通过与原地震资料的运算得到重建资料的高频部分，保留原地震资料的低频部分，得到重建的高频地震资料。

A practical analysis method of low frequency oscillations for large power systems is presented.

提出一种实用的大规模交直流电力系统低频振荡分析方法，该方法结合

In this ***, we also show how to compute a perceptual matrix about the Just Noticeable Difference based on Watson model. Then, according to the matrix, we develop two new algorithms of digital watermark based on Discrete Cosine Transform. In the last part of this chapter, we use some experiments to validate our algorithms.

在对Watson的视觉模型作了较为详细的描述的基本上，依据Watson模型并结合JPEG图像紧缩中常用的DCT变换及JPEG紧缩量化表，提出了基于Watson模型的DCT域低频与中频数字水印算法，并给出试验结果。

EL products developed by a series of high-pressure-resistant, low-voltage high-frequency series, low-frequency series of low pressure, long-life series, can be made into any size and graphics, can be bent, paste and hoisted for the PDA, LCD, remote control, computer, Cell phones, payphones, instruments, watches and clocks, watches backlight, but also made instructions and traffic alerts, fire logo, advertising and decoration, and so on.

公司开发的EL产品有耐高压系列、低压高频系列、低压低频系列、长寿命系列，可制作成任何尺寸和图形，可弯曲、粘贴和悬挂，用于PDA、LCD、摇控器、电脑、手机、电话机、仪器仪表、钟表、手表背光，还可制成交通指示和警示、消防标识、广告、装饰等等。

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