Personal profile
Summary
An academic who specialised in mathematical optimisation and its applications, with numerous years of experience in teaching fundamental mathematics and advanced operational research courses, and academic research experience in modelling, solving optimisation problems, with industrial experience in information technology.
Biography
I am a senior lecturer with the School of Mathematics and Physics, and a member of the Centre for Operational Research and Logistics (CORL), at the University of Portsmouth. My main duties and responsibilities include teaching operational research course units, as well as research in optimisation/operational research.
I obtained my PhD (specialising in optimisation) in 2005 from the National University of Singapore, and MSc (also specialising in optimisation) from the University of Washington, Seattle. I have been with the National University of Singapore and The Hong Kong Polytechnic University for a number of years before joining the School of Mathematics and Physics at Portsmouth.
Research Interests
- First and second order methods to solve optimization problems, such as, subgradient methods on convex/nonconvex optimization problems and interior point methods on conic optimization problems.
- Supply chain optimization, in particular, optimal inventory management.
Teaching Responsibilities
I am currently teaching three modules each academic year. They are:
- M121 - Mathematical Models.
- M351 - Quantitative Supply Chain Management.
- M454 - Logistics Modelling.
Besides, I supervise final year BSc and MSc in Logistics and Supply Chain Management projects.
Education/Academic qualification
Ph.D., Underlying Paths and Local Convergence Behaviour of Path-Following Interior Point Algorithm for SDLCP and SOCP, National University of Singapore
Award Date: 17 Feb 2005
Master of Science, University of Washington
Award Date: 13 Jun 1997
BSc (Hons), National University of Singapore
Award Date: 16 Jun 1993
BSc, National University of Singapore
Award Date: 10 Jun 1992
External positions
Invited Reviewer for Mathematical Reviews, American Mathematical Society
2011
Fingerprint
- 1 Similar Profiles
Research output
- 22 Article
-
Refining asymptotic complexity bounds for nonconvex optimization methods, including why steepest descent is o(ɛ-2) rather than O(ɛ-2)
Gratton, S., Sim, C. K. & Toint, P. L., 24 Jul 2025, In: Computational Optimization and Applications. 92, p. 515-527 11 p.Research output: Contribution to journal › Article › peer-review
-
Superlinear convergence of an interior point algorithm on linear semi-definite feasibility problems
Sim, C. K., 4 Mar 2025, In: Optimization Methods and Software. 40, p. 287-307 21 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile32 Downloads (Pure) -
Convergence rates for the relaxed Peaceman-Rachford splitting method on a monotone inclusion problem
Sim, C. K., 1 Jan 2023, In: Journal of Optimization Theory and Applications. 196, p. 298–323Research output: Contribution to journal › Article › peer-review
Open AccessFile83 Downloads (Pure) -
A FISTA-type accelerated gradient algorithm for solving smooth nonconvex composite optimization problems
Liang, J., Monteiro, R. & Sim, C. K., 13 May 2021, In: Computational Optimization and Applications. 79, p. 649-679 31 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile126 Downloads (Pure) -
Policies for inventory models with product returns forecast from past demands and past sales
Chou, M. C., Sim, C. K. & Yuan, X.-M., 1 May 2020, In: Annals of Operations Research. 288, p. 137–180Research output: Contribution to journal › Article › peer-review
Open AccessFile149 Downloads (Pure)
Datasets
-
Dataset for Paper "Policies for inventory models with product returns forecast from past demands and past sales"
Sim, C. K. (Creator), University of Portsmouth, 23 Feb 2020
DOI: 10.17029/8133c86b-eda7-4c57-900f-1699e64c47c5
Dataset
File -
Dataset for Paper "Interior point method on semi-definite linear complementarity problems using the Nesterov-Todd (NT) search direction: Polynomial complexity and local convergence"
Sim, C. K. (Creator), University of Portsmouth, 2019
DOI: 10.17029/4c5cdf06-1c02-4c05-8b31-593d17365bd7
Dataset
File
Projects
- 1 Finished
-
Extension to the relaxed Peaceman-Rachford splitting method
Monteiro, R. (PI), Sim, C. K. (CoI) & Liang, J. (Team Member)
23/07/18 → 30/04/21
Project: Research
Activities
-
15th International Workshop on Lot Sizing
Sim, C. K. (Presented paper)
26 Aug 2025Activity: Participating in or organising an event types › Participation in workshop, seminar, course
-
4OR: A Quarterly Journal of Operations Research (Journal)
Sim, C. K. (Peer reviewer)
29 Jun 2025 → 26 Aug 2025Activity: Publication peer-review and editorial work types › Publication peer-review
-
34th European Conference on Operational Research
Sim, C. K. (Presented paper)
23 Jun 2025Activity: Participating in or organising an event types › Participation in conference
-
EURO Journal on Computational Optimization (Journal)
Sim, C. K. (Peer reviewer)
23 Apr 2025 → 29 Jun 2025Activity: Publication peer-review and editorial work types › Publication peer-review
-
Optimization Letters (Journal)
Sim, C. K. (Peer reviewer)
17 Apr 2025 → 1 Jun 2025Activity: Publication peer-review and editorial work types › Publication peer-review