The notion of near periodicity is shown to be equivalent to that of weak near periodicity in dynamical systems. A suffic......

木材是人民生活及国家建设中必需材料,其需要量极大,但树木生长期长,形成供需矛盾尖锐.新世纪中可应用生物技术中基因重组、细胞融......

Equations of the reaction-diffusion type are very well known and have been extensively studied in many research areas. I......