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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 752831, 5 pages
Research Article

Further Results on Dynamic Additive Hazard Rate Model

1School of Mathematics and Physics, Lanzhou Jiaotong University, P.O. Box 405, Anning West Road, Anning District, Lanzhou, Gansu 730070, China
2Department of Applied Mathematics, College of Basic Science and Information Engineering, Yunnan Agricultural University, Kunming, Yunnan 650201, China

Received 15 April 2014; Revised 22 June 2014; Accepted 7 July 2014; Published 21 July 2014

Academic Editor: Wuquan Li

Copyright © 2014 Zhengcheng Zhang and Limin Zhang. 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.


In the past, the proportional and additive hazard rate models have been investigated in the works. Nanda and Das (2011) introduced and studied the dynamic proportional (reversed) hazard rate model. In this paper we study the dynamic additive hazard rate model, and investigate its aging properties for different aging classes. The closure of the model under some stochastic orders has also been investigated. Some examples are also given to illustrate different aging properties and stochastic comparisons of the model.