Scientists say the ocean's floors contain rich deposits of a range of potentially valuable minerals, but the extreme depths pose technical difficulties in harvesting them on a wide scale.

While impulse forces not acting on the centroid, the influence of accessional attack Angle oscillation amplitude, impulse force scale and function time interval on range correction was discussed.

Having largely abandoned painting for the greater part of his professional career, Hong Lei increasingly felt the desire to extend the range of his activities and work on a lager scale.