让空气进入
发表于 2025-3-30 10:03:57
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与野兽博斗者
发表于 2025-3-30 14:37:34
Measurements of Attenuation and Dispersion in Multi-Phase Materials Using Ultrasonic Point-Source/Poely. The frequency dependence of the attenuation and dispersion in the multi-phase materials was obtained by a single measurement and Fourier analysis. Mortar and paste were found to be less attenuative and dispersive than granite and concrete.
Adrenaline
发表于 2025-3-30 19:53:47
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Glaci冰
发表于 2025-3-30 21:15:20
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