单频率信号发生器;单频信号发生器

豆知识 2011-07-24&07-30 无线信号发生器的发展史

It starts with a blip, a beep, a noise, a pattern, a signal. It could be anything - ink on paper, machine data, or even the words flowing through your minds right now. Signal generators play an important role in testing devices we use every day. The

发表于:2018-12-11 / 阅读(217) / 评论(0)

英语解说豆知识2011年

SSS 2011-05-23

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Whether it's for streaming Netflix or sharing files, we're gobbling up more and more dataand we want it faster. But even shooting data with lasers over fiber-o

发表于:2018-12-24 / 阅读(193) / 评论(0)

Scientific American(五)月

电信专业英英词典C-1

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

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电信英语

电信专业英英词典D-2

Delay - This is the wait time between to specific events, and regarding satellite communications, it is the time it takes for a signal to go from the transmission station up to orbit and through the s

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电信英语

电信专业英英词典M-3

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

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电信英语

电信专业英英词典F-2

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

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电信英语

电信专业英英词典F-4

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

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电信英语

电信专业英英词典E-1

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.

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电信英语

电信专业英英词典D-4

D type Channel Bank A D type channel bank is channel termination equipment used for combining (multiplexing) individual analog channel signals on a time division basis. D type channel banks provide in

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电信英语

电信专业英英词典A-3

AT Command - This is the character

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电信英语

电信类英语词汇表大全-37

中文英文缩写多功能话务台 Multi-function Attendant Console MAC 多功能信息分配系统 Multi-function Information Distribution System MIDS 多级存储管理 multi-tier hierarchical

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电信英语

电信类英语词汇表大全-27

中文英文缩写单（点）播 unicast 单板 board/card 单边测试 one-sided test 单边带 Single Side Band SSB 单边带调制 single sideband modulation 单边带自适应差分 single ban

发表于:2019-01-03 / 阅读(216) / 评论(0)

电信英语

Bladeless Wind Generator Safe for Birds

Bladeless Wind Generator Safe for Birds Wind turbines are tall structures with large blades used to produce electricity. They are useful sources of low-cost, renewable energy. But they can also be deadly to birds and bats. The turbines large blades t

发表于:2019-01-12 / 阅读(246) / 评论(0)

2015年VOA慢速英语(七)月

美国国家公共电台 NPR In Puerto Rico, A Generator's Buzz Powers One Singer's Musical Imagination

RAY SUAREZ, HOST: After Harvey and Irma, the hurricane season wasn't over. Hurricane Maria made landfall on Puerto Rico as a massive Category 4 storm. Months later, the power supply is still spotty, and thousands of homes still rely on generators. Da

发表于:2019-01-16 / 阅读(196) / 评论(0)

2017年NPR美国国家公共电台12月

US, China signal new phase for ties

BEIJING, March 13 (Xinhua) -- Both China and U.S. signaled that the world's two biggest economies should explore a road of new-type relations. The new type of relations between major powers should be based on mutual respect, cooperation and seeking w

发表于:2019-02-03 / 阅读(188) / 评论(0)

英语新闻

Forecasts signal late-week launch of Tiangong-1

BEIJING, Sept. 26 (Xinhuanet) -- Weather forecasts showed that Thursday or Friday might be suitable for launching the Tiangong-1 spacecraft, experts said. The unmanned spacecraft, part of China's first spacecraft rendezvous and docking mission, was s

发表于:2019-02-03 / 阅读(276) / 评论(0)

英语新闻

学个词Learn a Word 第1349期　signal

今天我们要学的词是signal。 Signal, 作为动词，意思是显示。 The number of Americans filing for unemployment benefits for the first time fell to the lowest level in nearly six months, signaling a slight improvement in the job market

发表于:2019-02-05 / 阅读(185) / 评论(0)

英语单词荟萃

【英语时差8，16】外星人来电，说什么？

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

发表于:2019-02-23 / 阅读(177) / 评论(0)

英语时差8，16

陨落星辰第一季第151期:一家人的离别

Here you go, Mr. Scott. Okay. 斯科特先生，给你。好 Oh, this must be really messing their heads up. 这个肯定能扰乱它们的攻势 The frequency's still locked in place. 频率还锁定在这个地方 How are you feeling? 你感觉怎样

发表于:2019-03-02 / 阅读(316) / 评论(0)

陨落星辰第一季

陨落星辰第一季第147期:源源不断的敌人

I guess those Mech bullets really work, huh? Ben. 看来械甲金属弹真的有用。本 Everybody get down! Get down! 大家蹲下，隐蔽 Call out your ammo! 清点弹药 I got two. Three shots left. 还有两发。剩三发 Four. How many more w

发表于:2019-03-02 / 阅读(322) / 评论(0)

陨落星辰第一季

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argumentum ad nauseam