搜索结果: 1-13 共查到“国际动态 frequency”相关记录13条 . 查询时间(0.111 秒)
Quantum sensors, which detect the most minute variations in magnetic or electrical fields, have enabled precision measurements in materials science and fundamental physics. But these sensors have only...
In the quest for fusion energy, understanding how radio-frequency (RF) waves travel (or “propagate”) in the turbulent interior of a fusion furnace is crucial to maintaining an efficient, continuously ...
Physics of laser frequency combs sheds light on nature’s problem-solving skills（图）
Physics laser frequency combs sheds light problem-solving skills
2019/10/23
Nature has a way of finding optimal solutions to complex problems. For example, despite billions of ways for a single protein to fold, proteins always fold in a way that minimizes potential energy. Sl...
High-Frequency Chip Brings Researchers Closer to Next Generation Technology（图）
high-frequency chip researchers next generation technology
2017/9/5
A novel, high-frequency electronic chip potentially capable of transmitting tens of gigabits of data per second — a rate that is orders of magnitude above the fastest internet speeds available today —...
New Design Results in Compact,Highly Efficient Frequency Comb
New Design Results Compact Highly Efficient Frequency Comb
2017/3/30
Northwestern Engineering researchers have designed a quantum cascade laser (QCL) frequency comb that is dramatically more efficient than previous iterations. Led by Manijeh Razeghi, researchers i...
Holidaymakers concerned about fresh volcanic eruptions causing flight-disrupting ash clouds might be reassured by a study setting out the first reliable estimates of their frequency.While the Universi...
Frequency combs are the rulers of light. By counting a wavelength’s many oscillations, they measure distance and time with extraordinary precision and speed.
Since the discovery of optical frequency ...
Scientists Identify Source of Mysterious Low-Frequency Sound Heard for Decades in the Southern Ocean
Scientists Identify Source Mysterious Low-Frequency Sound Heard for Decades Southern Ocean
2014/5/13
Scientists have conclusive evidence that the source of a unique rhythmic sound, recorded for decades in the Southern Ocean and called the “bio-duck,” is the Antarctic minke whale (Balaenoptera bonaere...
May 10, 2007，A super stable fiber-optic network that can be tuned across a range of visible and near-infrared frequencies while synchronizing the oscillations of light waves from different sources has...
Hotter-than-expected neutron star surfaces help explain superburst frequency
neutron stars Astrophysical nuclear physics
2007/4/16
April 13, 2007，EAST LANSING, Mich. — A new theoretical thermometer built from heavy-duty mathematics and computer code suggests that the surfaces of certain neutron stars run significantly hotter than...
February 15, 2007，Physicists at the National Institute of Standards and Technology (NIST) have taken the first ever two-dimensional pictures of a “frequency comb,” providing extra information that enh...
High-Frequency Cryocooler Is Tiny, Cold and Efficient
cryogenic refrigerator microelectromechanical systems
2007/2/28
February 15, 2007，A new cryogenic refrigerator has been demonstrated at the National Institute of Standards and Technology (NIST) that operates at twice the usual frequency, achieving a long-sought co...
Feb. 7, 2007，BOULDER, Colo.—Physicists at the Commerce Department’s National Institute of Standards and Technology (NIST) have taken the first ever two-dimensional pictures of a “frequency comb,” prov...