简介:Inthispaper,wedealwithamodelforthesurvivalofredbloodcellswithperiodiccoefficientsx'(t)=-μ(t)x(t)+P(t)e~(-γ(t)x(t-τ(t))),t≥0.(*)AnewsufficientconditionforglobalattractivityofpositiveperiodicsolutionsofEq.(*)isobtained.OurcriterionimprovescorrespondingresultobtainedbyLiandWangin2005.