单词：frequency-hopped (fh)spread spectrum signals
单词：frequency-hopped (fh)spread spectrum signals 相关文章
WHITE HOUSE President Donald Trumps administration wants to shut down U.S. government radio stations that announce official time, a service in operation since World War II. WWV and WWVB in the state of Colorado and WWVH on the island of Kauai in the
VOA标准英语2018年(九月)
[00:00.00]The Feather-plucked Crow 被拔了毛的乌鸦 [00:05.40]There was once a crow who did not like being a crow [00:10.55]for he thought he looked ugly with his plain black feathers. [00:14.15]He wished his feathers were as colorful as a peacocks fe
语言的力量
Plant Signals 植物的语言 Can plants smell and taste in the same way that animals do? Can they talk to each other and to insects? Learn how scientists hope to unravel some of the mysteries of plant senses -- on today's Earth and Sky. JB: This is Eart
(科普英语)Earth and Sky
On January 11, Norway became the first country to begin turning off signals from its FM radio network. The Norwegian stations will instead use only digital audio broadcasting, called DAB. FM, or frequency modulation, radio stations have been in opera
2017年VOA慢速英语(一)月
Three radio stations in the United States mainly broadcast one thing: the official time. The three are radio stations WWV and WWVB, in the state of Colorado, and WWVH, on the island of Kauai in Hawaii. They send out signals that are used by millions
2018年VOA慢速英语(九)月
Cache - Generally, a place to temporarily store something. Regarding computers and telecommunications, it is a place where data is temporarily stored during transmission. Call - This is a connection b
电信英语
Multimode Optical Fiber(S) Multimode fibers, with much wider cores than single mode fibers, allow light to enter at various angles, and reflect (bounce off of) core-clad boundaries as electromagnetic
电信英语
Focal Length - Distance from the exact center of the dish to the center of the feed. Focal Point - The physical point in space toward which the satellite reflector dish directs the received signal so
电信英语
Frame In time division multiplexing systems, Frame is a sequence of time slots each containing a sample from one of the channels carried by the system. The frame is repeated at regular intervals, (nor
电信英语
Earth Station - The term used to describe the combination of antenna, low-noise amplifier (LNA), down-converter, and receiver electronics that are used to receive a signal transmitted by a satellite.
电信英语
Some call it the hormone of love. Its oxytocin and it helps moms bond with and breast-feed their babies, and even keeps romantic couples content. Now a study suggests that this same hormone might also help people with autismby improving their social
Scientific American(二)月
By Jessica Berman Washington 28 May 2008 Monkeys have successfully operated robotic arms to feed themselves with human-like precision, activating a mechanical device with signals from their brain. Researchers say the technique could eventually be use
VOA标准英语2008年（五月）
[00:42.81]What do you usually say if you dial a wrong number? [00:48.35]I'm sorry,I think I dialled the wrong number. [00:58.38]What does Steve ask Pippa to do? [01:02.43]To go to a lecture [01:07.29]When and where is the lecture going to be given? [
高中英语人教版高二
[00:04.78]Lesson 89 1 Dialogue [00:11.05]STEVE:Hello.Can I speak to Pippa,please? [00:13.27]喂!我可以找彼帕接电话吗? [00:15.49]VOICE:There's no Pippa here.This is 8686087. [00:19.51]这里没有彼帕这个人,这里的号码是8686087. [0
高中英语人教版高二
Screams Have Special Place in Brain 尖叫声在大脑中会有特殊的位置 From VOA Learning English, this is the Health Lifestyle report. Have you ever thought about screaming? A blood-curdling scream is a natural reaction to sudden, extreme fri
2015年VOA慢速英语(八)月
Science and technology 科学技术 Searching for aliens 寻找外星人 The wow factor 防止再次意外 A new citizen-science project will improve the chances of finding ET 一个新的平民科学项目可以增大找到地外智慧的机会 EVER
经济学人科技系列
By Stuart Cohen Sydney 08 October 2009 Southern Brown Tree Frog sits on a log in swampy lands near Melbourne, Australia (Sept 2009 file photo) Australia's frogs are having trouble finding love. Traffic noise and other sounds of city life, such as ai
VOA标准英语2009年(十月)
Chinese scientists have announced a gravitational wave research plan they're dubbing Taiji. The Chinese Academy of Sciences says their research plans will be finalized later this year. Academy member Wu Yueliang says their research will focus on low
2016CRI中国国际广播电台
the previous show Don and Yael discussed communication from other worlds. Well, as it turns out if E.T. does try to phone it will be much more complicated than can you hear me now? D: Okay, Yael, so suppose one day scientists pick up a transmission t
英语时差8，16