Dynamic behaviour for a nonautonomous heroin epidemic model with time delay
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Abstract
In this paper, we have modified the White and Comiskey heroin epidemic model (White and Comiskey in Math. Biosci. 208:312–324, 2007) into a nonautonomous heroin epidemic model with distributed time delay. We have introduced some new threshold values R * and R * and further obtained that the heroin-using career will be permanent when R *>1 and the heroin-using career will be going to extinct when R *<1. Using the method of Lyapunov functional, some sufficient conditions are derived for the global asymptotic stability of the system. The aim of this modification is to identify the parameters of interest for further study, with a view to informing and assisting policy-maker in targeting prevention and treatment resources for maximum effectiveness.
Keywords
Heroin epidemic Time delay Permanence Lyapunov functional Global stabilityMathematics Subject Classification (2000)
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