This study shows the usefulness of Artificial Neural Network (ANN) in maintenance planning and man-agement. An ANN model based on the multi-layer perceptron having three hidden layers and four processing elements per layer was built to predict the expected downtime resulting from a breakdown or a maintenance activity. The model achieved an accuracy of over 70% in predicting the expected downtime.

In this study, we developed a multi-wavelength terahertz-wave parametric generator that operates with only one injection seeding laser. Tunable lasers used as an seeder must be single-frequency oscillators, and conventional requires basically the same number of wavelengths. order to solve problem, new external cavity semiconductor laser incorporates DMD in its wavelength-selective mechanism. pr...

The design and development of structural materials that can survive under the extreme conditions operation are critical to next generation aerospace energy technologies. Selectively designed multi-principal element alloys (MPEAs), which solid solution phases with three or more principal elements on simple underlying lattices, expected fulfill such requirements. combination refractory metals kno...