后退
发表于 2025-3-23 10:52:28
New Theoretical Basis for Determining the Geoacoustic Parameters of the Seabed,indicate the following: the wave speeds show very weak, logarithmic frequency dispersion; the attenuations are closely proportional to frequency, f; and both wave speeds increase with increasing mean grain size. A new theoretical approach to wave propagation in unconsolidated sediments is described,
飞镖
发表于 2025-3-23 13:57:34
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能得到
发表于 2025-3-23 21:39:56
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陶器
发表于 2025-3-23 23:37:49
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软弱
发表于 2025-3-24 05:26:29
Application of Geo-Acoustic Inversion Techniques to Subsurface Imaging of Seismic Near Field Scenardisposal sites, former military or industrial regions up to 50 m depth. Using seismic methods becomes more and more popular in this part of environmental protection. In near-surface seismics the elastic wavefield is excited by a seismic source, e.g. a falling weight or a sledge hammer acting on a me
Gingivitis
发表于 2025-3-24 08:23:39
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富足女人
发表于 2025-3-24 11:02:23
Lih-Rong Wang,Michael P. H. Liu few oceanographic modes. We also used the echo-pattern to track the source over a period of several days. During this period the isotherms in the ocean wavered by 20 m as a result of the tides, providing a challenge for model-based tracking. We will discuss these acoustic results with emphasis on the source tracking.
Obituary
发表于 2025-3-24 16:20:37
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Myocyte
发表于 2025-3-24 21:24:38
ical processes in shallow water environments. Toreview the state of the art, an international workshop was held atCarvoeiro, Portugal, in March 1999, bringing together leadinginternational researchers in the field. In contrast to much of therecent theoretical work, emphasis was placed on the .experi
使混合
发表于 2025-3-25 01:51:48
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