百度试题 结果1 题目 Radio frequency () waves are a mode of transportation for information and carriers for RF waves are air, copper wire and fiberoptic cable. ( ) 相关知识点: 试题来源: 解析 正确 反馈 收藏
free charge carrierssemiconductorsmicrowave rangenonlinear regimesolitonsKdV equation/ A7230 High-frequency effectsWe show that internal waves that are similar to internal gravity waves in the ocean can propagate in semiconductors with a gradient of free charge carrier concentration. Unlike internal gravity...
(2) If two modulated waves, the carriers of which are of the same frequency but of different phases, are applied to an intermittent blocking push-pull arrangement and if one of said Waves is eliminated, the Wave which is retained will be of a phase whereof the value is determined not onl...
Internal wave energy is apparently dissipated by mixing at the head of the canyon. A major storm during the experiment induced strong currents in the canyon. These currents are probably more important than internal waves as carriers of sediment except in the very head of the canyon. 展开 ...
Cosmic string networks are expected to generate a characteristic stochastic gravitational wave background that may be within the reach of current and upcom
To enhance the effectiveness of detection, ultrasonic guided wave imaging detection utilizes the propagation characteristics of ultrasonic media and utilizes reflected or transmitted sound waves as carriers of information. In the case of the imaging detection of ultrasonic guided wave arrays in plates, ...
Turbidity currents are important carriers for transporting terrestrial sediment into the deep sea, facilitating the transfer of matter and energy between land and the deep sea. Previous studies have suggested that turbidity currents can exhibit high velocities during their movement in submarine canyons. ...
Body waves are of two types: compressional or primary (P) waves and shear or secondary (S) waves. P- and S- waves are called "body waves" because they can travel through the interior of a body such as the Earth's inner layers, from thefocusof an earthquake to distant points on the...
Meanwhile, Chery Automobile, having placed an order for three car carriers from its shipyard, anticipates the delivery of its first vessel this year. The automaker exported 925,000 vehicles in 2023. The ship deliveries come at a time when Chinese automakers are facing cha...
Phase relations between velocity and brightness fluctuations observed in spectral lines in the visible are utilized both to diagnose the dynamical state of the solar atmosphere, and to examine the various oscillatory motions as potential carriers of mechanical energy dissipated in the upper layers. After...