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加勒比海怪新蟲 (小有名氣)
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[求助]
求幫忙解釋一下什么是慢變振幅近似和慢變包絡(luò)近似
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可不可以幫忙解釋一下慢變振幅近似和慢變包絡(luò)近似,有點(diǎn)不理解,謝謝各位了 發(fā)自小木蟲Android客戶端 |
至尊木蟲 (著名寫手)
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似乎是一個(gè)東西:In?physics, the?slowly varying envelope approximation[1]?(SVEA, sometimes also called?slowly varying amplitude approximation?or?SVAA) is the assumption that the?envelope?of a forward-travelling?wave?pulse varies slowly in time and space compared to a?period?or?wavelength. This requires the?spectrum?of the signal to be?narrow-banded—hence it also referred to as the?narrow-band approximation. 發(fā)自小木蟲Android客戶端 |
新蟲 (小有名氣)
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