MTTF

Monte Carlo method of MTTF evaluation based on fault tree analysis

基于故障树分析的系统平均寿命评定的MonteCarlo方法

Monte Carlo Method of MTTF Evaluation for Large Complex System

大型复杂系统平均寿命评定的MonteCarlo方法

For applications with high reliability requirement , how to improve system MTTF is one of the key problems .

对数据有高可靠性要求的应用，如何提高系统MTTF是人们研究的主要问题。

The BC_a Intervals for the MTTF of Parallel or Series System

系统平均寿命的BCα区间估计

The presented method can be easily used in engineering for MTTF evaluation of large complex system , where limited testing data of unit life time is required .

解决了有限样本条件下，大型复杂系统平均寿命评定问题，对工程中大型复杂系统平均寿命评定具有重要应用价值。

Based on reliability diagram modeling and calculation of minimal path sets , Monte Carlo sampling simulation method of MTTF is obtained for large complex system .

基于可靠性框图建模，采用最小路集计算分析，提出了大型复杂系统平均寿命评定的MonteCarlo方法。

Based on the physical model , the temperature and the MTTF of copper interconnect can be calculated accurately , which can be used as an effective guide to IC designing and manufacturing .

根据该物理模型可以准确计算出互连线具体的温度和寿命数据，可以用于集成电路的设计和工艺制造。

With the comparison of the result calculated by the maximum entropy method and the MTTF ( mean time to failure ) method respectively , the maximum entropy method was proved to be more precise .

通过最大熵方法和故障平均间隔（MTTF，MeanTimeToFailure）方法的结果比较，证明最大熵方法更具准确性。

The reliability lab ship fuel oil donkey boiler controlled by relay control system is evaluated using counting method , and mean time to failure ( MTTF ) of the control circuit is educed .

对采用继电器控制系统进行控制的某实验室船舶燃油辅助锅炉，采用计数法进行可靠性评估，得出控制电路的平均无故障时间。

By concentrating on Mean Time to Repair ( MTTR ) rather then Mean Time to Failure ( MTTF ) , we find that quick recovery reduces recovery time and thus offers higher availability .

通过关注平均修复时间，而不是平均故障时间，发现快速的恢复减少了恢复时间，因而提供了更高的可用性。

The maximum likelihood estimate and uniformly minimal variance unbiased estimate ( UMVUE ) of MTTF were made on the one-unit system whose lifetime was assumed to be on GAMMA distribution .

讨论寿命服从单参数GAMMA分布单元平均寿命的极大似然估计和一致最小方差无偏估计；

Finally obtain the mean time between failures ( MTBF ), mean time of repair failures ( MTTF ), inherent availability ( A ) as well as reliability index such as reliability and failure rate function according to the distribution model .

最后根据分布模型计算得到该加工中心的故障间隔时间（MTBF）、平均维修时间（MTTF）、固有可用度A以及可靠度和失效率函数等可靠性指标。

Through this experiment platform , we could inspect ECU automatically and effectively , age the ECU , determine the ECU ′ s MTTF , carry out ECU 's reliability experiment , manage the ECU production and quality control through database .

通过此实验平台，可以自动高效检测ECU，测定ECU平均寿命MTTF，进行ECU可靠性试验，通过数据库统计管理ECU生产以及质量控制等。

In this dissertation , a large number of real defects are obtained from the IC . IC defect detection , feature extraction and classification and its influence on signal integrity and MTTF ( Median-Time-To-Fail , MTTF ) of IC are studied in detailed .

本文将从IC电路中获取大量的真实缺陷，系统、深入地研究IC缺陷的检测、缺陷的特征提取和分类、缺陷对电路信号完整性的影响以及缺陷对IC中位寿命的影响。

Results are MTTF up to 4000 hrs at 50 ℃, which could be expected to exceed 10 ~ 5 hrs ( when Ea is 0.9 eV ) at the room temperature ( 20 ℃) . The observed modes of the lifetime are in good agreement with log-normal distributions .

其结果是50℃时MTTF大于4000小时，采用0.9eV激活能外推室温（20℃）下，中值寿命大于10万小时，所观察到的寿命模式符合对数正态分布。