New results on comparisons of parallel systems with heterogeneous gamma components

作者：Zhao, Peng^*; Balakrishnan, N.

来源：Statistics & Probability Letters, 2011, 81(1): 36-44.

DOI：10.1016/j.spl.2010.09.016

• Dispersive order
• Star order
• Majorization
• p-larger order
• Parallel system

This paper discusses ordering properties of lifetimes of parallel systems with two independent heterogeneous gamma components in terms of dispersive and star orders. It is proved, among others, that the p-larger order between the two scale vectors implies the dispersive order and the star order between lifetimes of two parallel systems. Another sufficient condition is also provided for the star order between the lifetimes of two parallel systems. The results established here extend some of the known results in the literature.

• 出版日期2011-1
• 单位兰州大学