منابع مشابه
Complete knee replacement surgery
In normal activities such as walking, rnning, kneeling, climbing stairs and gettmg in and out of chairs the loa pu OI.the human knee joint can exceed five times the weight of the body. Nowadays large numbers of people make ! urtrer d mands on the knee in participatmg 1_n sucli sport as football, tennis and long distance runnng. It is no wonder that many people go mto their later years with o...
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Age replacement policy is concerned with finding an optional time tominimize the cost, at which time the unit is replaced even if itdoes not fail. So far, age replacement policy involving random agehas been proposed. This paper will assume the age of the unit is anuncertain variable, and find the optimal time to replace the unit.
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ژورنال
عنوان ژورنال: Nature
سال: 2009
ISSN: 0028-0836,1476-4687
DOI: 10.1038/457504a