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1. There were two ways to improve the availability, one of them is to decrease the mean time to repair(MTTR), the other is to increase the mean time to fail(MTTF).

2. Common life, loss of efficiency, reliability and MTTF characterization parameters such as the operation reliability of micro-motor.

3. 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.

4. Checking results show that, MTTF and MTTR of whole province's 200MW set in fossile P. P. all accord with 2-parameter Weibull distribution.

5. According to Monte Carlo sampling simulation method of MTTF, MATLAB is to be used in sampling simulation, which greatly increases the computing efficiency. It is very important for engineering ap...

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

7. Usually, failure fans will not be repaired, so the fan products are suitable for MTTF report.

8. The common reliability targets are reliability probability and M'TTF (Mean Time To Failures). MTTF features directly and distinctly, so it is more convenient.

9. 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.