Kochar and Xu (2009) proved that a parallel system with heterogeneous exponential component lifetimes is more skewed (according to the convex transform order) than the system with independent and identically distributed exponential components. In this paper we extend this study to the general k-out-of-n systems for the case when there are only two types of component in the system. An open problem proposed in Paltanea (2008) is partially solved.
机构:
North China Univ Sci & Technol, Coll Sci, Tangshan 063009, Peoples R ChinaNorth China Univ Sci & Technol, Coll Sci, Tangshan 063009, Peoples R China
Ding, Weiyong
Yang, Jiaxin
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Wuhan Univ, Sch Resource & Environm Sci, Wuhan, Peoples R ChinaNorth China Univ Sci & Technol, Coll Sci, Tangshan 063009, Peoples R China
Yang, Jiaxin
Ling, Xiaoliang
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Hebei Univ Sci & Technol, Coll Sci, Shijiazhuang, Peoples R ChinaNorth China Univ Sci & Technol, Coll Sci, Tangshan 063009, Peoples R China