That may be a hint that the action evolved as a social cue - "time for us all to go to bed" - although as usual when evolution and human behaviour meet, the tie is speculative at best.
Agglomerating behaviour of fine particles and the influence of vibrational parameter on agglomerate size in a type of vibro-fluidized bed are investigated.
本文研究了微细粉体在振动流化床中的团聚行为和振动参数对团聚物尺寸的影响。
3
The relation of the sticking behaviour of fine iron ore with the separating morphology of metallic iron during reduction in a fluidized bed had been analyzed with scanning electron microscopy.