We consider the question of characterizing compact quotients of the complex 2-ball by curvature conditions, which improv......

阻尼技术最早是由Powell引入,近年来又由Al-Baali等人重新提出.本文主要将阻尼技术的两种新策略应用于有限记忆拟牛顿框架中,从而......

<正> 三辊式弯板机广泛用于建筑、冶金、轻化等行业的金属板材弯曲和卷管。板材的弯曲成管是一弹塑性变形过程,这一过程由弹塑性弯......

In this note,we obtain the elliptic estimate for diffusion operator L=△+φ on complete,noncompact Riemannian manifo......