The study of flow and heat transfer over rotating circular disks is of great practical importance in understanding the cooling of rotatory machinery such as turbines, electric motors and design and manufacturing of computer disk drives. This paper presents an analysis of the flow and heat transfer over a heated infinite permeable rough disk. Boundary-layer approximation reduces the elliptic Nav...

Machine health management is one of the main research contents PHM technology, which aims to monitor states machines online and evaluate degradation stages through real-time sensor data. In recent years, classic sparsity measures such as kurtosis, Lp/Lq norm, pq-mean, smoothness index, negative entropy, Gini index have been widely used characterize impulsivity repetitive transients. Since entro...

This paper presents a complete and well tested virtual instrument (VI) for computer numerical control (CNC) machine predictive maintenance. The national (NI) hardware, LabVIEW software accelerometer sensor are acquired the vibration analysis integrated with were developed based on severity chart threshold in ISO 10816. Validation experiments of maintenance module utilized drilling milling proce...