误解
发表于 2025-3-21 16:18:26
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monologue
发表于 2025-3-21 21:21:53
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敌手
发表于 2025-3-22 02:44:27
Alexander A. Prokopenko,Douglas F. Williamsment of the fluid relative to the solid frame. Both losses can be included in the Biot theory for sound propagation in porous media. This theory gives an attenuation coefficient for the frictional loss that is proportional to the frequency, f, and, a viscous attenuation increasing as f. at low frequ
Intercept
发表于 2025-3-22 05:40:28
Alexander A. Prokopenko,Douglas F. Williamsr. Knowledge of these properties enables one to derive the complex reflection factor under arbitrary angles of incidence, which is an important quantity in modelling sound propagation. Though preference has been given to all methods that operate remotely, no successful breakthrough has yet been achi
水獭
发表于 2025-3-22 09:23:10
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殖民地
发表于 2025-3-22 13:18:27
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bacteria
发表于 2025-3-22 19:50:19
Alexander A. Prokopenko,Douglas F. Williamsown to a depth of about 70 m below the sediment surface. Several different structures due to high gas contents are described and explained for the first time in the northern Adriatic. They range from the so-called “basin effect” and cone-like structures to acoustic voids. Gas seeping from the bottom
THROB
发表于 2025-3-23 00:34:23
Characteristics of World Leadershipities from the echosounder returns, sidescan sonar and sub-bottom profiling, supplemented by surface samples and cores, are compared. The reflection intensities are integrated from the echoes of the top 75 cm of sediment. The instrument is very sensitive to slight changes in the composition of muds
诱骗
发表于 2025-3-23 01:40:18
Characteristics of World Leadershiptions from the Southeast Asian shelves and marginal basins. The velocity functions are least-squares regressions of the form V = V. + Kt, where t is one-way vertical travel-time to layer mid-points. The value of K shows surprisingly little variability on the shelves and adjoining basins from the Bay
异教徒
发表于 2025-3-23 09:09:35
Characteristics of World Leadershippic. Physical models have been developed and refined which can both explain the observations and serve as a basis for predictions. Examples will be presented which contrast values determined from the physical models with measured data in order to identify problem areas and to recommend directions fo