无线电波

With that, emphases were be put on the basic principle、methods and its advantages in the study on the characteristic of the microcell based on ray tracing method of determinate analysis means.

接着重点阐述了利用射线跟踪技术这种确定性的分析方法预测无线电波传播特性的基本原理、方法，以及它在微蜂窝小区的电波传播特性研究中的优势。

It is a new type long distance detector, which integrates the eradiation and receiving of radio wave, and the management, imaging and storage of signal.

它是集无线电波发射与接收、信号处理和传输、成像、存储于一体的新型远程探测设备。

Using the time-gain compensation technique to compensate for ultrasonic wave's weaking when transmitting in the air,and reduce the fluctuation of echo signal.The peak time detecting circuit which is composed of full-wave rectification circuit and differential circuit can detect the reach time of echo signal accurately.

和其他方法相比，如激光测距、微波测距等，由于声波在空气中传播速度远远小于光线和无线电波的传播速度，对于时间测量精度的要求远小于激光测距、微波测距等系统，因而超声波测距系统电路易实现、结构简单和造价低，且超声波在传播过程中不受烟雾、空气能见度等因素的影响，在各种场合均得到广泛应用。

One function is to link to a ground station using radio wave signals and a satellite using optical signals.

一个功能是使用无线电波信号链接地面站，和使用光信号链接卫星。

This is the third set of files made by recording the radiosignal as ingress into my computer system.

第3套文件是通过录制无线电波信号在进入你电脑系统时产生的。

In making the radio waves correspond to each sound inturn,messages are carried from a broadcasting station to areceiving set.

使无线电波依次对每一个声音作出相应变化时，信息就由广播电台传递到接收机。1.4后置定语大量使用后置定语也是科技文章的特点之一。

The first successful radio range-finding experiment occurred in 1924, when the British physicist Sir Edward Victor Appleton used radio echoes to determine the height of the ionosphere, an ionized layer of the upper atmosphere that reflects longer radio waves.

首次成功的无线电范围内调查试验发生在1924年，当英国物理学家尤德爵士维克多阿普尔顿使用的无线电回波，以确定高度，电离层，电离层的上层大气，反映了较长的无线电波。

The lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves .

电离层中的最底层，处于地球表面以上至英里的部分，反射低频无线电波。

When Marconi invented radio, he thought it would be used for ship-to-shore communication. Not for pop music.

当马可尼发明了无线电波时，他认为这可以用来进行从海船到海岸之间的通信，不是应用在流行音乐方面。

John McKean, who is part of the research team at the Max Planck Institute, says some black holes, are inactive.

约翰麦侃是卜朗克无线电波天文研究学院研究团队的一员，说有些黑洞是不活动的。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。