海底地

OBC dual-receiver is a new-developed exploration technique in the late eighties of last century, which is mainly used to suppress " water column reverberation " interference appeared between sea bottom and sea level that resulted in effectively improving S/N ratio of seismic data.

海底电缆双检接收技术是20世纪80年代末出现的勘探新技术，主要用于压制在海底和海面之间存在的"水柱混响"干扰，能有效地提高地震资料的信噪比。

The predictions are identical with that of foreign underwater acousticexperiments.The third,the scattering theory are applied in prediction of seareverberation and inversion of sea bottom parameter.Shallow-sea monstaticreverberation is predicted by combining shallow-sea normal mode theory withscattering theory.Then with simulated annealing of neural network and scatteringtheory accurate inversion of sea-bottom parameter and surface roughness are given.

第三，把散射理论应用于海洋混响的预报和海底介质参数的反演，首先通过浅海简正波理论和散射理论相结合，对浅海单程混响进行了预报；然后利用神经网络理论中的模拟退火法和散射场理论相结合，准确地反演了海底介质参数和表面粗糙度。

B. earthquake, volcanic eruption, tidal wave following earthquake or seaquake, windstorm, flood, overflow of the sea, tidal wave, landslide, subsidence, collapse.

地震、火山爆发、地震或海底地震后之海啸、暴风、洪水、海水氾滥、海潮、山崩、地陷、倒塌。

So this study can also been used to separate the sandy sediments and the silty sediments.

通过界面散射对不同底质海底影响的研究，也可将砂质海底与泥质海底比较明显地区分开来。

Also subsea tunnel projects in other Nordic countries will be presented as they have been designed and constructed according to Norwegian subsea tunnel principles.

相应地，介绍了其他北欧国家的海底隧道，这些隧道大多也是根据挪威海底隧道的经验进行设计和施工的。

Synchronous, superharmonic and in particular subharmonic resonance were selectively excited over the fast varyi ng topography with corresponding wavelengths.

根据对快变海底波长的不同选取，可以相应地激发环境流同非平整海底的同步共振、超谐波共振和次谐波共振，由此产生自由表面波运动。

The unique geographic position of shelf and marginal sea causes the material supply of seafloor sediments plenteous and the material sources of them diverse. As terrigenous materials being input into the sea continually and a great deal of authigenous minerals coming into being, the sediments can be used to study the change of sea level and the meterail and energy exchange between the sea and the land.

陆架和边缘海独特的地理位置决定了海底沉积物物源的充足与多样性，陆源物质源源不断地通过河流输入到海洋中，同时大量的自生矿物在海洋中生成，因此研究陆架和边缘海海底沉积物，可以为研究海平面变化、海陆之间物质和能量的交换等作用提供信息。

Research on bioturbation is very important to roundly and exactly understand the processes of biogeochemical cycles in marine sediments, accurately reconstruct the records of palaeogeography, palaeoclimatology and palaeoecology, reasonably adjust and control the biodiversity of seabed ecosystem.

海底生物扰动作用的研究，对于全面、精确地掌握海洋中各种物质的生物地球化学循环过程，正确回溯古气候、古海洋和古生态记录，合理调节和控制海底生态系统的多样性具有十分重要的意义。

"There are two types of oyster farming: suspension culture, in which oysters are grown off bottom, in floating trays, is a labor-intensive form of cultivation that requires continuous tending and cleaning of both gear and shellfish, and bottom culture, which is similar to conventional crop farming on land; it involves selecting areas of the sea floor that provide a natural food supply, necessary currents, minimum exposure to predators, and proper temperature and then ""seeding" the bottom with shellfish stock that are left to grow to market size.

中文解释=有两种典型的牡蛎养殖场︰悬浮养殖，牡蛎不接触海水底部而在悬浮的箱架中生长，属於劳动力密集型式的养殖方式，工具和贝都需要经常照顾和清洗。底部养殖，类似於传统的在土地上种植农作物，需要选择能提供营养物、必须的水流、被捕食者接触的机会最小、和适宜的温度的海底地，然后将贝类&种植&在海底，让它生长到市场所需的大小。

T. Van Richthofen writes in his "Letters" of the earliest times in the history of our earth, when probably the entire east and north Asia were under the sea.

T。 Van Richthofen &书信&中的一段会让我们对庐山的地质结构有所了解--在最远古地球上，整个亚洲的东部和北部还深藏于海底，经过一个漫长的古生代，才慢慢从海底浮出，在石灰纪后期，中国从海底延伸出来的地方变得很干燥，而沉淀在深海不同区域的白色矿床不断地伸出海面，再没有沉入海底，也没有任何证据表明中国的任何一座山曾在侏罗纪、白奎纪和第三纪再一次沉人海面。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。