考虑协变量的设备退化和生产批量整合模型
刘学娟,赵斐

Integrated model of system degradation and production lot sizing with considering covariate
Xue-juan LIU,Fei ZHAO
图 3 不同协变量取值情况下的单位时间期望费用
Fig.3 Expected cost per unit time with different values of covariate