Professor Department of Mathematics and Statistics University of Saskatchewan 106 Wiggins Road, MCLN 219 Saskatoon, SK, CANADA, S7N5E6 Email: longhai.li@usask.ca Homepage: https://longhaisk.github.io Official Profile: https://artsandscience.usask.ca/profile/LLi

Short Biography

Longhai Li is a professor at the University of Saskatchewan in Canada. He received his Ph.D. degree in statistics from the University of Toronto under the supervision of Prof. Radford M. Neal, a core member of the machine learning group at the U of T. Before that, he received B.Sc honours in statistics from the University of Science and Technology of China. He served on the NSERC IDG EG 1508 committee (Mathematics and Statistics) during 2022-2025. His research activities focus on developing and applying statistical machine-learning methods for bioinformatics and epidemiology data. His research has been funded by NSERC, CANSSI, CFI, CFREF, and MITACS. His research papers have appeared in highly reputed journals, such as Journal of American Statistical Association, Bayesian Analysis, Statistics in Medicine, Statistics and Computing, American Statistician, Journal of Applied Statistics, Scientific Reports, and BMC Bioinformatics.

Research Interests

statistical learning; cross-validation; hierarchical modelling; survival modelling; model checking; residual diagnostics; model comparison; zero-inflated models; high-throughput data

Current Research Activities

• Model Diagnostics and Comparison

He aims to develop new tools for evaluating Bayesian/non-Bayesian models with complex structures. Today, increasingly complicated models are being proposed for a variety of correlated data such as temporal, spatial, and repeated measurement data. There is a gap between developing new modelling methods and model validation methods. He is working on developing new residual diagnostic methods for checking the adequacy of statistical models.

• Statistical Machine Learning

He aims to develop new tools for honestly measuring the predictivity (such as error rate, AUC) of selected features, and new tools for identifying truly predictive features and for building sharper predictive models for phenotypes. He is particularly interested in uncovering the molecular mechanisms behind Alzheimer’s and Parkinson’s diseases.