As one of the biggest province of cultural deposits, Henan has made a great progress in archaeological studies in the last fifty year since the founding of the
Straightforward and direct synthesis of 2-substituted-5-oxazolecarbaldehydes was achieved by treating propargylamides with mercury(II)perchlorate as catalyst an
A three-dimensional k-ε-Ap two-fluid turbulence model is proposed to study liquid-particle two-phase flow and bed deformation. By solving coupled liquid-phase