Ph.D., Industial Engineering, September 2010 - present
Department of Industrial and Systems Engineering (ISE), Lehigh University, Bethlehem, PA
Primary field: Nonlinear Optimization
Advisor: Prof. Frank E. Curtis
B.S., Applied Mathematics, Feburary 2008 - July 2010
School of Sciences, Tianjin University, China
Thesis title: On the extreme values of Randic index on chemical trees
B.S., Industrial Engineering, September 2006 - July 2010
College of Management and Economics, Tianjin University, China
Thesis title: A computational study of multiple response surface methods
• A Computational Study of Primal-dual Active-set Algorithm Applied on SVMs in Machine Learning
Designed and implemented in MATLAB; the algorithm usually converges in 10 iterations even for large-scale problems with 10,000+ variables. Individual work.
• Computational Performance of Orbit-branching for Integer Programming
Contributed in the design of the algorithm, tested with Python on Margot’s symmetric integer programming test sets; analyzed the results that undercut running time by 30% compared with traditional branch and bound approach. Joint work.
• An Experiment on Parallel Gaussian Elimination with OpenMPI
Contributed in the C++ implementation and test; the implementation gained speedup of 3 with 4 processors. Joint work.
• Primal-dual Active-set Method with Inexact Subproblem Solvers(ipdas)
Designed and implemented in MATLAB/Python; object-oriented and available on https://github.com/zhh210/ipdas and https://github.com/zhh210/pypdas
• Conference of Modeling and Optimization: Theory and Applications (MOPTA), Bethlehem, PA. August 2012
Title: A Primal-Dual Active Set Algorithm for Convex Quadratic Optimization
• Computational Optimization Research at Lehigh (COR@L) Seminar, ISE Lehigh University, Bethlehem, PA. May 2011
Title: Active-set Identification for Nonlinear Programming
• Institute for Operations Research and the Management Science (INFORMS), student member
• Society of Industrial and Applied Mathematics (SIAM), student member
• High Performance Computing (HPC) at Lehigh, student member
• The New York Academy of Sciences (NYAS), student member
F. E. Curtis, Z. Han, and D. P. Robinson, ”A Globally Convergent Primal-Dual Active-Set Framework for Large- Scale Convex Quadratic Optimization,” COR@L Laboratory, Department of ISE, Lehigh University, 12T-013, 2012. Available here.