Results 1 to 10 of about 2,478,930 (305)

Structural Improvement of Differential Motion Assembly in In Situ Pressure-Preserved Coring System Using CFD Simulation

open access: yesApplied Sciences, 2023
In situ pressure-preserved coring (IPP-Coring) is one of the most efficient methods for identifying the scale of the oil and gas content. However, the differential motion assembly of the IPP-Coring system often undergoes ball and ball seat seal failure ...
Da Guo   +5 more
doaj   +1 more source

Efficient Iodine Removal by Porous Biochar-Confined Nano-Cu2O/Cu0: Rapid and Selective Adsorption of Iodide and Iodate Ions

open access: yesNanomaterials, 2023
Iodine is a nuclide of crucial concern in radioactive waste management. Nanomaterials selectively adsorb iodine from water; however, the efficient application of nanomaterials in engineering still needs to be developed for radioactive wastewater ...
Jiaqi Li   +6 more
doaj   +1 more source

Overconsolidation Characteristics of Silt Layer in the Guangdong-Hong Kong-Macao Greater Bay Area

open access: yesAdvances in Civil Engineering, 2022
In practical engineering projects, overconsolidation plays an irreplaceable role in the calculation of silt consolidation settlement. Based on a series of systematic consolidation tests conducted on reconstituted soft clay in different cities of the ...
Dashu Guan   +6 more
doaj   +1 more source

Long-Range Underwater Communication Based on Time Reversal Processing Using Various Diversity Methods

open access: yesSensors, 2022
Time reversal processing (TRP) exploits signal diversity methods, namely, spatial, temporal, beam, and frequency, to mitigate the distortion caused by multipath time delay.
Donghyeon Kim, Jeasoo Kim, Jooyoung Hahn
doaj   +1 more source

Wind Energy Ships: Global Analysis of Operability

open access: yesJournal of Marine Science and Engineering, 2021
Most offshore wind farms are bottom-fixed at sites with less than 50 m of water depth. For deeper waters, floating platforms are economically viable and, for many countries that have steep continental shelves, this is the only option for developing ...
César Vidal Pascual   +2 more
doaj   +1 more source

Review of Energy Efficiency of the Gas Production Technologies From Gas Hydrate-Bearing Sediments

open access: yesFrontiers in Energy Research, 2021
Even in the carbon-neutral age, natural gas will be valuable as environment-friendly fuel that can fulfill the gap between the energy demand and supply from the renewable energies.
Koji Yamamoto, Sadao Nagakubo
doaj   +1 more source

Aglaopheniid hydroids (Cnidaria: Hydrozoa: Aglaopheniidae) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program

open access: yesEuropean Journal of Taxonomy, 2020
Sixteen aglaopheniid hydroids occurring in two recent, deep water collections from off New Caledonia are reported upon, of which 8 species are new, namely Cladocarpus asymmetricus sp. nov., C. partitus sp. nov., C. pennatus sp.
Horia R. Galea
doaj   +1 more source

Three-Dimensional Sound Propagation in the South China Sea with the Presence of Seamount

open access: yesJournal of Marine Science and Engineering, 2021
Seamounts have important effects on sound propagation in deep water. A sound propagation experiment was conducted in the South China Sea in 2016. The three-dimensional (3D) effects of a seamount on sound propagation are observed in different propagation ...
Shenghao Li   +3 more
doaj   +1 more source

Analysis of the world oil and gas exploration situation in 2021

open access: yesPetroleum Exploration and Development, 2022
The global exploration investment, new oil and gas discoveries, exploration business adjustment strategies of oil companies in 2021, and future favorable exploration domains are systematically analyzed using commercial databases such as IHS and public ...
Lirong DOU   +6 more
doaj   +1 more source

Deep water parasites [PDF]

open access: yesAnnales de Parasitologie Humaine et Comparée, 1990
Few geographically local comprehensive studies on deep-sea parasites have been done. A recent study of parasitism in midwater fishes conflicts with broad generalizations previously advanced. Surveys of demersal fishes and macrofaunal invertebrates in the North Atlantic indicate 1) there is little evidence of coherence and continuity of faunal zones ...
openaire   +2 more sources

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