* Quality Engineering and Applied Statistics: multivariate statistics, reliability engineering and maintenance policy, design of experiments, wavelet analysis.
* Variation Propagation Modeling and Analysis: multistage manufacturing process modeling, process control, variation reduction, quality and reliability integration with the applications in solar power systems, assembly processes, metal forming processes, unmanned ground vehicle, etc.
* Information Technology: distributed sensing, data mining and causal discovery, data dimension reduction and pattern recognition, and their applications in modeling, monitoring, and inferring of complex systems and human behavior.