<正>Based on the theories and approaches in biomechanics, the mechanism and pattern of niche construction were discussed systematically. Through establishing th
<正>Polycrystalline ceramics have heterogeneous meso-structures which result in high singularity in stress distribution. Based on this, a progressive fragment m
<正>Based on Biot’s dynamic consolidation equations,by means of Laplace-Hankel transform technology,the integral solutions of stress and displacement in satura