Rongjie Lai
Dr. Rongjie Lai received his B.S. degree in mathematics from the University of Science and Technology of China, in 2003, his M.S. degree in mathematics from the Academy of Mathematics and System Sciences, Chinese Academy of Sciences in 2006 and his Ph.D. degree in applied mathematics from the University of California, Los Angeles, in 2010. Before he joined RPI in 2014, Dr. Lai held visiting assistant professor positions at the University of Southern California and the University of California, Irvine, respectively.
Dr. Lai’s research interests are mainly in developing mathematical and computational tools for analyzing and processing signals, images as well as unorganized data using methods of variational partial differential equations and computational differential geometry. His research further extends to the design of efficient numerical methods to solve variational PDEs and optimization problems. Dr. Lai’s research has wide applications in medical imaging, brain mapping, computer graphics, as well as their extensions to data science.
Education

B.S. in Mathematics, University of Science and Technology of China, 2003
M.S. in Mathematics, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, 2006
Ph.D in Applied Mathematics, University of California, Los Angeles, 2010
Selected Publications
 R. Lai and H. Zhao, "Multiscale NonRigid Point Cloud Registration Using Rotationinvariant SlicedWasserstein Distance via LaplaceBeltrami Eigenmap". SIAM Journal on Imaging Sciences, 10(2), pp. 449—483, 2017.
 C. Kao, R. Lai and B. Osting,"Maximal LaplaceBeltrami Eigenvalues on Closed Riemannian Surfaces". ESAIM: Control, Optimization and Calculus of Variations, 23(2), pp. 685720,
 R. Lai and J. Lu, “Localized Density Matrix Minimization and Linear Scaling Algorithms”, 315, pp. 194–210, Journal of Computational Physcis, 2016
 R. Lai, J. Lu and S. Osher, “Density Matrix Minimization with l_1 Regularization”, Communications in Mathematical Sciences, 13(8), pp. 20972117, 2015
 V. Ozolins, R. Lai, R. Caflisch, S. Osher: "Compressed Plane Waves yield Compactly Supported Multiresolution Basis for the Laplace Operator", Proceedings of the National Academy of Sciences (PNAS), 111(5), pp. 16911696, 2014.
 Y. Shi, R. Lai, J.J. Wang, D. Pelletier, D. Mohr, N. Sicotte and A. W. Toga: “Metric Optimization for Surface Analysis in the LaplaceBeltrami Embedding Space”, IEEE Trans. Medical Imaging， 33(7), pp. 1447–1463, 2014.
 R. Lai, Z. Wen, W. Yin, X. Gu, and L. Lui, “FoldingFree Global Conformal Mapping for Genus0 Surfaces by Harmonic Energy Minimization”, Journal of Scientific Computing, 58(3), pp. 705–725, 2014.
 R. Lai and S. Osher, “A splitting method for orthogonality constrained problems”, Journal of Scientific Computing, 58(2), pp. 431–449. 2014.
 R. Lai, J. Liang and H.K. Zhao, “A local Mesh Method for Solving PDEs on Point Clouds”, Inverse Problems and Imaging, 7(3), pp. 737755, 2013.
 V. Ozolins, R. Lai, R. Caflisch, S. Osher， “Compressed Modes for Variational Problems in Mathematics and Physics”, Proceedings of the National Academy of Sciences (PNAS), 110 (46), pp. 18368–18373, 2013.