| 单词 | sine wave |
| 释义 | > as lemmassine wave sine wave n. a periodic oscillation of pure and simple form in which the displacement at any point is proportional to the sine of the phase angle at that point; a wave or curve resembling (a segment of) this in form. ΘΚΠ the world > matter > physics > mechanics > types of motion > [noun] > wave > types of wave long wave1792 internal wave1804 stationary wave1833 solitary wave1838 standing wave1845 travelling wave1845 pressure wave1871 ripple1871 surface wave1887 sine wave1893 Rayleigh wave1903 shock wave1907 spherical wave1907 Love wave1924 bow shock1938 Rossby wave1951 soliton1965 1893 D. E. Jones tr. H. Hertz Electr. Waves 17 The vibration of the primary conductor is, at any rate to a first approximation, a uniformly damped sine-wave of determinate period. 1902 Encycl. Brit. XXXIII. 223/1 In Squier and Crehore's ‘Synchronograph’ system ‘sine waves’ of current, instead of sharp ‘makes and breaks’, or sharp reversals, are employed for transmitting signals. 1916 Electrician 76 800/1 The alternating current produced in the telephones is almost a pure sine wave. 1923 E. W. Marchant Radio Telegr. & Teleph. viii. 99 One of the chief difficulties in using it [sc. a method of sending signals] is the fact that it does not usually give a pure sine wave. 1965 Wireless World Sept. 455/1 To verify the rated output of an amplifier a 1 kc/s sinewave is fed through it at a level sufficient to produce the rated output power. 1972 Islander (Victoria, Brit. Columbia) 21 May 15/2 Some of the flat fishes, such as flounders and rays, move by undulating their bodies in a flattened sine wave. Visualize this movement as a flag held horizontally in a stiff wind. < as lemmas |
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