Researched nonlinear dynamics of blade-disk-rotor system and implemented experiments of cracked rotors and blades.Proposed a scheme for feature selection using global geometric structure and executed feature extraction with wavelet and EEMD approaches.Applied data based approaches in condition classification and focused on determination of abnormal condition in degradation process and dimensionality reduction in large feature set.Completed a program of automatic crack growth with ABAQUS and Python, including establishing interface to access FEA results.

Implemented Bayesian estimate in model based prognostics and carried out predictions and confidence of remaining useful life of crack structures based on fracture mechanic models.

Proposed a direct temperature measurement method in steam turbine using two bandwidths of radiation to improve the accuracy and avoid influences of steam.Conducted theoretical analysis and test rig design.CFD anlsysi of piping in ships.