The first pre-sunrise fall in amplitude of radio waves of frequency 164 kHz transmitted from Radio Tashkent and received at Delhi at a distance of about 1600 km is found to occur in a majority of cases when the solar zenith angle, χ at the path mid-point is near 98°. It is shown...
网络幅度;波幅;幅值 复数:amplitudes 同义词 n. largeness,fullness,scale,plenty,breadth 权威英汉双解 英汉 英英 网络释义 amplitude n. 1. (声波、无线电波等的)振幅the greatest distance that a wave, especially a sound or radio wave, vibrates (= moves up and down) ...
16 Plane-polarised radio waves are transmitted by a vertical aerial. The amplitude of the waves is A when they reach a receiving aerial which is tilted from the vertical at an angle 6 in the plane perpendicular to the direction of arrival.The power delivered by the vertical aerial to the ...
This system of modifying the carrier waves is called "Amplitude Modulation, " or " AM ". 这个改变载波的系统称为 “ 振幅调制 ” 或缩写为 “ AM ”. 辞典例句 I retrofitted our ommunications to anamplitude modulation. 我把我们通讯改为调幅模式. ...
Observations of extremely low frequency (ELF, 3–3000 Hz) radio waves generated by a "beat‐wave" (BW) high frequency (~ 4.04–4.9 MHz) ionospheric heating are presented. ELF waves were registered with the ELF receiver located at Lovozero (68°N, 35°E), 660 km east from the European...
Characteristics of Coronal Alfvén Waves Deduced from Helios Faraday Rotation Measurements A statistical study of Faraday rotation fluctuations (FRF) has been performed using polarization angle data of S-band (f = 2.3 GHz) radio spacecraft signal... V.,E.,Andreev,... - 《Solar Physics》 被引...
Electron cyclotron harmonic (ECH) instabilities just outside the plasmapause and at frequencies near the cold upper hybrid frequency are a common feature of the Earth's magnetosphere. These waves which have virtually no magnetic component, are believed to have an important role in the generation of...
15.A few important aspects of this wave include the frequency and the amplitude. 该波的几个重要方面包括频率和振。机翻 「Life Noggin」 16.Continuous sound waves are digitized by taking " snapshots" of their amplitudes every few milliseconds. 连续声波通过每隔几毫秒对其度进行“快照”进行数字化。机...
Decrease in (AChE) activity was independent of carrier wave frequencies. A short-term exposure did not have any significant effect on AChE activity.关键词: Brain Parasympathetic Nervous System Animals Rats Rats, Wistar Acetylcholinesterase Radio Waves Male DOI: 10.1016/0006-8993(93)91729-C ...
i. The amplitude of a wave is the maximum displacement, or the maximum value, it attains from its mean position during a cycle. It is both positive and negative. With sound waves, the greater the amplitude, the louder is the sound.ii. Angular distance north or south of the prime vertica...