代表
发表于 2025-3-21 17:17:58
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Ankylo-
发表于 2025-3-21 21:11:10
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interference
发表于 2025-3-22 00:33:48
Chemical Sound Absorption in the Seamber of processes occur in sea water, only two account for most of the absorption in the frequency range of interest. These involve MgSO. (relaxation frequency f.~100 kHz) and B(OH). (f.~1 kHz). Investigations by the resonator method have revealed a third relaxation involving MgCO. (f.~10 kHz) which
他姓手中拿着
发表于 2025-3-22 07:47:26
Scattering from Inhomogeneitiestheoretical and experimental descriptions concentrate on the smaller scatterers, especially fish, since internal waves and other wave motions will be covered else-where. A great variety of effects is listed, together with their significance for the scatterers themselves and for the resulting sonar l
花争吵
发表于 2025-3-22 09:04:59
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灵敏
发表于 2025-3-22 14:28:49
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发源
发表于 2025-3-22 20:46:48
Acoustic Detection, Communication, and Signal Processing Requirements for the Optional Deployment of system for the next decade. It involves deploying five SSBNs at any given time in two shallow regions off the cost of Western Europe each with a surface area of 5000 km. and depths of 45–80 m. It also involves placing a grid of sonic sources with characteristic spacing of 500 m in fixed and accurat
傻
发表于 2025-3-22 22:35:50
Signal Processing Aspects of Nonlinear Acousticsed on the possibilities nonlinear effects might offer. In 1968, Mellen (2) illustrated some of these possibilities through laboratory tank experiments. Berktay returned in 1972 (3) to present some engineering models for the design of parametric sources. In 1976, Bjørnø (4) presented a survey of theo
确定
发表于 2025-3-23 04:11:00
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OMIT
发表于 2025-3-23 07:52:51
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