虚拟物流组织构建过程

根据虚拟物流组织构建过程中需要考虑的主要因素,采用IDEF0建模方法分析了虚拟物流组织构建过程,给出了相应过程的使用工具和解决方法.阐述了虚拟物流组织构建过程中目标确定、初步构建、组织结构与运行模式确定和运行反馈与组织解体四个阶段,并对每个阶段应用过程流程图方法进行了过程描述,指出了虚拟物流组织构建过程中需要解决的主要问题.     

Preservation of the NBUCA Class of Life Distributions

Introduction As is well known, lifetime distributions can beclassified by stochastic ordering. Recently, Ahmad etal.[1]defined a new aging class, namely, NBUCA(new better than used in increasing convex average),based upon the increasing convex average order. Inthe theory of economics, this order is known as weakthird-order stochastic dominance[2]. Under the as-sumption that the elements are independent andidentically distributed (i.i.d.), the preservationproperties of this class under convo…