Drifting buoys in the Northeast Atlantic     

Booth  D. A.; Meldrum  D. T. 《ICES Journal of Marine Science》1987,43(3):261-267

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Influence of structural flexibility and wave interference on dynamic behavior of idealized offshore platform     

A.G. Abul-Azm  A.N. Williams  S.T. Mau 《Ocean Engineering》1987,14(3)

An approximate method is presented to estimate the hydrodynamic loading and structural response of an idealized offshore platform subjected to a regular train of linear surface waves. The platform is taken to consist of four bottom-mounted, flexible, circular cylinders supporting a rigid deck and is assumed to be aligned parallel to the incident wave direction. The response of each column is assumed to be one-dimensional and to be governed by linear beam theory. The solution technique for the fluid velocity potential involves replacing scattered waves by equivalent plane waves together with non-planar, first-correction terms, and can be shown to be a large spacing approximation.Numerical results are presented which show the effect of hydrodynamic interference and structural flexibility on the platform response.  相似文献   

Microearthquakes along the back-arc spreading system in the eastern Bismarck Sea     

T. Eguchi  Y. Fujinawa  M. Ukawa  L. Bibot 《Geo-Marine Letters》1986,6(4):235-240

OBS’s were deployed for 26 to 29 days in the eastern Bismarck Sea to investigate the back-arc spreading. Hypocenters of 186 shallow earthquakes were determined using P- and S-waves from at least five stations. In the western survey area, a transform fault zone is marked by a linear micro-earthquake activity striking N65°W and less than 5 km wide. The predominant type of their focal mechanisms is strike-slip. In the eastern area, several intermittent zones of micro-earthquakes and their strike-slip type focal mechanisms suggest the location of short-length transform faults separating en-echelon spreading ridges.  相似文献   

Acoustic measurements of zooplankton distributions in the sea     

Pieper  R. E.; Holliday  D. V. 《ICES Journal of Marine Science》1984,41(3):226-238

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Abandonment and recovery solution of submarine pipelines   总被引：1，自引：0，他引：1  

T.K. Datta 《Applied Ocean Research》1982,4(4):247-252

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The shape of deep-water siliciclastic systems: A discussion     

K. T. Pickering 《Geo-Marine Letters》1982,2(1-2):41-46

Deep-water siliciclastic systems are classified primarily on their shape as: submarine fans with well developed or poorly developed morphology, slope drapes, for example, over relatively stable basin margins, fault-scarp aprons, canyons and large channels, under-supplied sheet systems such as abyssal plains, non-fan ponded systems such as over-supplied perched basins, and fan deltas. Collectively, or separately, these systems may form sedimentary basin fills that can be over or under-supplied with respect to the sediment input although most systems will tend toward over-supply/overflow with time. Finally, the sum total of the siliciclastic systems and basins can be used to define the tectonic milieux such as passive, strike-slip and convergent margins.  相似文献   

Fine-grained sediments in deep water: An overview of processes and facies models     

Dorrik A. V. Stow 《Geo-Marine Letters》1985,5(1):17-23

There appears to be a continuum of processes affecting the transport and deposition of fine-grained sediments in the deep sea. This results in a facies continuum within which we can recognize three broadly different facies groups: turbidites, contourites, and pelagites/hemipelagites. Several distinct facies models can be defined for each group on the basis of their chief structural, textural, and compositional attributes.  相似文献   

Pattern recognition of suspended material     

Szekielda  Karl-Heinz; Duvall  James T. 《ICES Journal of Marine Science》1976,36(3):205-216

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Improved in situ gamma-ray transmission densitometer for marine sediments     

T.J. Hirst  M. Perlow Jr.  A.F. Richards  B.S. Burton  W.J. van Sciver 《Ocean Engineering》1975,3(1):17-27

The first-generation University of Illinois gamma-ray transmission densitometer, designed for the in situ measurement of sediment bulk density, was modified by incorporating in the detector probe (1) an Americium-241 alpha particle pulser and an anti-walk gain stabilization control to maintain better temperature stability and (2) a small power supply and a IC preamplifier to eliminate the need for a high-voltage coaxial cable between the detector and external signal conditioning electronics package. This second-generation Lehigh University system has been successfully deployed since 1971 in routine use from ships and submersibles in the Atlantic and Pacific Oceans and the Gulf of Mexico. Results are presented of system operations to (1) measure bulk density over the range of 1.2–1.8 Mg/m³ in the Hudson Canyon, (2) penetrate 1.9 m into the seafloor in the San Diego trough and, (3) be lowered to a water depth of 3.6 km in the Gulf of Mexico.  相似文献   

The influence of the gulf’s geometry on seiche oscillations in an enclosed basin     

Yu. V. Manilyuk  L. V. Cherkesov 《Physical Oceanography》1997,8(4):217-227

The finite-elements technique is applied to study the effect of a basin’s geometry (bays, harbours) and location of the characteristics of seiche oscillations in the basin and in the gulf proper. An increase of the length of the bay is shown to contribute to the periods of natural oscillations and to cause their restructuring. Translated by Vladimir A. Puchkin.  相似文献