?早夭期
...易发生失效,其失效率随着时间变化逐渐递减, 为一时间的严格递减函数λe(t),此一时期一般称为早夭期(Infant Mortality Period); 当时间超过某一时刻tu之后,有一段相当长的时间内( tu≦t≦tw),失效往往是偶然发 生的,物品的失效率大致不变,为一常数值λ...
?早夭失效期
1)早夭失效期(infant mortality period) 当产品刚制造完成时,就好像婴儿容易生病一样,失效率很高,因而称为为早夭失效期,在这个阶段中产品的失效率随时间增加而逐渐递...
And in one of the most deprived areas of Maharashtra in India the infant mortality rate fell by 60% over a three year period during which mothers were trained as baby monitors.
BBC: Baby deaths 'could be halved'
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