| 单词 | very high frequency |
| 例句 | Copper wires can carry very high frequencies too, but only for a few feet before the signal starts to degrade in strength due to certain parasitic effects. The World Is Flat 2005-04-05T00:00:00Z The sofa-length artifact on display, this klystron tube is a vacuum device that amplifies very high frequencies. The Early ’60s: Timeout, drop in, think back Thus a wart can be burned off with very high frequency current without causing the heart to stop. College Physics for AP Courses 2015-08-12T00:00:00Z GTAs have been shown to be responsible for genetic changes, sometimes at a very high frequency compared to other evolutionary processes. Biology for AP Courses 2022-06-09T00:00:00Z For much of the decade following his first capture, Grizzly 168 was a marked bear that off and on sported a “very high frequency” tracking collar. Grizzly, 34, confirmed as Yellowstone region’s oldest known 2021-01-23T05:00:00Z “Any one mutation may rise to very high frequency across the world, just because of random chance,” says Kristian Andersen, a computational biologist at Scripps Research. The pandemic virus is slowly mutating. But is it getting more dangerous? 2020-07-14T04:00:00Z Coast Guard officials said Wednesday that the very high frequency radio communications equipment was upgraded in Louisville, Kentucky. Coast Guard upgrades its communications with inland mariners 2017-06-01T04:00:00Z At very high frequencies, electrical current travels only on the surface of a person. College Physics for AP Courses 2015-08-12T00:00:00Z According to Ashcroft, the light hydrogen ions would shake with very high frequency phonons, the key to boosting the transition temperature. Stinky hydrogen sulfide smashes superconductivity record 2015-08-17T04:00:00Z Quartz clocks exploit the fact that quartz crystals vibrate at a very high frequency if the right electrical charge is applied to them. The element that redefined time 2014-10-03T04:00:00Z The commission freed up 100 megahertz of airwaves in a very high frequency band of the electromagnetic spectrum, known as the 5 gigahertz band, where another unlicensed band of similar size already exists. F.C.C. Votes to Clear More Airwaves for Wireless Data 2014-03-31T18:21:14Z Earlier this week they announced Gigabit data transmission at very high frequency – in effect a 5G wireless performance level – a decade ahead of 5G being implemented. Who Should Be Scared of Samsung's 1GB+ Wireless Technology? 2013-05-17T13:17:57Z It was later found that these discharges created an invisible, penetrating form of very high frequency electromagnetic radiation. College Physics for AP Courses 2015-08-12T00:00:00Z Gallium Arsenide and Gallium Nitride are preferred for LEDs, certain photovoltaics, and some very high frequency radio applications. Why Use Silicon? 2012-06-07T04:31:34Z To accomplish this, a very high frequency is essential; a high potential is likewise required, but this is merely an incidental necessity. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Currents of considerable magnitude of very high frequency may thus be passed through the body without inconvenience to the patient. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z The researchers thought the predators might switch to very high frequency whistles to co-ordinate the hunt. How orcas hunt in 'stealth mode' 2011-03-03T08:54:05Z “People are trading news at very high frequency,” he said. Wall St. Computers Read the News, and Trade on It 2010-12-22T20:10:00Z "Our very high frequency of FASDs...implies an extremely selected population," the researchers write. Fetal alcohol disorders common in Eastern Europe adoptees 2010-04-13T15:24:00Z It would then be possible to send over the wire current vibrations of very high frequencies at enormous distances, without affecting greatly the character of the vibrations. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z The FM stations operate exclusively in the very high frequency range and are all moderately powered at four kilowatts. Area Handbook for Romania In radio we use alternating currents which have very high frequencies. Letters of a Radio-Engineer to His Son They're using an electric field of very high frequency, but variable frequency. The Ultimate Weapon As to the machine here—it is, as I said, a machine which impresses very high frequencies on the body it is connected with. The Black Star Passes Such discharges of very high frequency, which render luminous the air at ordinary pressures, we have probably occasion often to witness in Nature. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Furthermore, a lightning discharge is oscillatory; that is, alternating, and of very high frequency. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Just in how much a very high frequency is essential for the production of the results presented is a question which even with my present experience, would embarrass me to answer. Experiments with Alternate Currents of High Potential and High Frequency Such discharges of very high frequency which render luminous the air at ordinary pressure we have very likely occasion to witness in the aurora borealis. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z That there are only electrostatic effects active seems to be clearly proved by Mr. Tesla's experiments with an induction coil operated with alternating currents of very high frequency. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Just in how much a very high frequency is essential for the production of the results presented is a question which, even with my present experience, would embarrass me to answer. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z On the other hand, the impedance of such a coil to a lightning discharge is much higher, due to the very high frequency of the discharge. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. To accomplish this, a very high frequency is essential; a high potential is likewise required, but this is a merely incidental necessity. Experiments with Alternate Currents of High Potential and High Frequency When such jars are discharging through a circuit of low resistance the same is traversed by currents of very high frequency. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z It is an undeniable fact that with very high frequencies, provided the impulses be of harmonic nature, like those obtained from an alternator, there is less deterioration and the vacua are more permanent. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z A very large coil, when operated with currents of very high frequency, may not give as much as 1/8 inch spark. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z It would then be possible to send over the wire current vibrations of very high frequencies at enormous distance without affecting greatly the character of the vibrations. Experiments with Alternate Currents of High Potential and High Frequency Such discharges of very high frequency, which render luminous the air at ordinary pressures, we have probably often occasion to witness in Nature. Experiments with Alternate Currents of High Potential and High Frequency |
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