For late Professor M. J. D. Powell's software, see Software.

PolyU offers an MSc Programme in Data Science and Analytics.

SIAM OP20 cannot be held in Hong Kong in May 2020 due to CONVID-19. Arrangements will be announced when available.

Positions

Research interests

Research papers

  • S. Gratton, C. W. Royer, L. N. Vicente, Z. Zhang, Direct search based on probabilistic feasible descent for bound and linearly constrained problems, accepted in Comput. Optim. Appl., 2019 [pdf] [SpringerLink]

  • X. Chen, C. T. Kelley, F. Xu, Z. Zhang, A smoothing direct search method for Monte Carlo-based bound constrained composite nonsmooth optimization, SIAM J. Sci. Comput., 40(4): A2174–A2199, 2018 [pdf] [SIAM epubs]

  • S. Gratton, C. W. Royer, L. N. Vicente, Z. Zhang, Complexity and global rates of trust-region methods based on probabilistic models, IMA J. Numer. Anal., 38(3): 1579–1597, 2018 [pdf] [link]

  • M. Dodangeh, L. N. Vicente, Z. Zhang, On the optimal order of worst case complexity of direct search, Optim. Lett., 10(4): 699–708, 2016 [pdf] [SpringerLink]

  • S. Gratton, C. W. Royer, L. N. Vicente, Z. Zhang, Direct search based on probabilistic descent, SIAM J. Optim., 25(3): 1515–1541, 2015 [pdf] [SIAM epubs]

  • Z. Zhang, Sobolev seminorm of quadratic functions with applications to derivative-free optimization, Math. Program., 146(1–2): 77–96, 2014 (based on sections 4.3–4.5 of my thesis) [pdf] [SpringerLink]

External grants

  • Jan. 2018–Dec. 2020, “Nonlinear Optimization Based on Inaccurate Information”, PI, awarded by the Research Grants Council (RGC) of Hong Kong under the Early Career Scheme (ECS)

Education

Contact

  • Address: TU824, Yip Kit Chuen Bldg., Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China

  • Email: zaikun.zhang [&] polyu.edu.hk, zaikunzhang [&] gmail.com, zhang [&] linux.com
    (Remark: the gmail address is my permanent personal email address; however, please understand that I may not be able to check it when visiting my home institute or my parents, which happens particularly often during summer and holiday seasons)

  • Tel: +852-27664592

  • Fax: +852-23629045