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Abstract and Applied Analysis
Volume 2013, Article ID 146729, 6 pages
Research Article

Positive Almost Periodic Solution for a Model of Hematopoiesis with Infinite Time Delays and a Nonlinear Harvesting Term

1Department of Mathematics, Hefei Normal University, Hefei 230601, China
2School of Mathematical Science, Anhui University, Hefei 230039, China

Received 4 June 2013; Accepted 29 August 2013

Academic Editor: Peixuan Weng

Copyright © 2013 Hui Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A generalized model of Hematopoiesis with infinite time delays and a nonlinear harvesting term is investigated. By utilizing a fixed point theorem of the differential equations and constructing a suitable Lyapunov functional, we establish some conditions which guarantee the existence of a unique positive almost periodic solution and the exponential convergence of the system. Finally, we give an example to illustrate the effectiveness of our results.