Monte Carlo computer simulation and a cited example of application show thaat the effects of the BISP and the current classical methods are well-matched for the same quality of product, but the required test time for the BISP is much shorter.
Monte Carlo模拟及应用实例表明对于相同的寿命水平BISP和现行的经典方法效力很好吻合,但前者较后者所需试验时间大为缩短。
The results of research indicate that the vacuum quality of CCRT can be presented with the performance of screen scanning outgassing in the beginning 25 hours, which can be used in estimating or comparing the manufacturing technology and material of screen (including gas exhausting technology and equipment), predicting the life (lapsed by vacuum factors) of the whole tube.
Population lifetime in 1991 was evaluated with variance oflife expectancy obtained from life table drawn up by Jiang Qinglang recommended by WHO. The life expectancy was 52.47 years in male and 59.35 years in female, which was lower than that of other nationalities.
Conclusion:There were differences on age distribution in leading causes of death,the life expectancy and the life eliminated major cause of deaths among different nationality.
By taking, the 2205 cylindrical roller bearing for an example, Ib view of the product disign, machinery process and bearing life test-ing, the causes of medium and small size cylindrical roller bearings possessing short life are analyzed, and the way of improving the life level for above hearings are found.
Surface machining technology plays an important role in the service life ofminiature bearing.In this paper,the effect of super-precision lapping on the wear resistance ofbearings was investigated.It showed that as used the optimizing super precision lapping procedure,the wear resistance of the bearings,as measured by radioisotopic method,could be raised to 10.9times than that of using comnon processing and their servicing life comes up to that of SKFbearing.Several trial bearings were assembled and mountea ...
This paper provides a Bayesian item-censored sequential procedure for lifetime test (BISP) on two-parameter Weibull distribution and puts it into effect in the assessment of roiling bearing's lifetime. The procedure makes full use of prior knowledge and the information obtained in the process of lifetime test to make the decision to accept, to reject, or to continue. Monte Carlo computer simulation and a cited example of application show thaat the effects of the BISP and the current classical methods are we...
本文针对两参数Weibull分布提出了一种Bayes定效截尾序贯寿命试验程序(BISP Bayesian Item-censored Sequential Procedure for lifetime test),并付诸应用于滚动轴承考核。该程序既充分利用有关轴承寿命的先验知识又及时利用试验过程中所获得的信息作出统计决策—或接收、或拒收、或继续试验。Monte Carlo模拟及应用实例表明对于相同的寿命水平BISP和现行的经典方法效力很好吻合,但前者较后者所需试验时间大为缩短。