SIM Chee Khian/SIM Chee-Khian

Presentation Given:

• "Optimal policies for inventory systems with two types of product sharing common hardware platforms", 20 minutes presentation, 23rd Annual POM Conference, Chicago, U.S.A., April 2012.
• "Local convergence of interior point methods on semi-definite programs using a path-based approach", 20 minutes presentation, 19th Triennial Conference for the International Federation of Operational Research Societies (IFORS2011), Melbourne, Australia, July 2011.
• "Optimal policies for inventory systems with two types of product sharing common hardware platforms: single period and finite horizon", 15 minutes presentation, The 8th International Conference on Optimization: Techniques and Applications (ICOTA8), Shanghai, China, December 2010.
• "Asymptotic behavior of underlying NT paths in interior point methods for monotone semidefinite linear complementarity problems", 20 minutes presentation, International Conference on Engineering and Computational Mathematics (ECM2009), Hong Kong, May 2009.
• "An RFID-enabled model with no cross-over of orders", 20 minutes presentation, Second International Workshop on Successful Strategies in Supply Chain Management, Hong Kong, January 2009.
• "On the underlying paths and local convergence behavior of an interior point algorithm for semidefinte linear complementarity problems", 1 hour presentation, Departmental Seminar, The Hong Kong Polytechnic University, Hong Kong, September 2008.
• "An RFID-enabled model with no cross-over of orders", 20 minutes presentation, The 7th International Conference on Optimization: Techniques and Applications (ICOTA7), Kobe, Japan, December 2007.
• "An RFID-enabled model with no cross-over of orders", 1 hour presentation, Brown Bag Seminar, The Logistics Institute-Asia Pacific, Singapore, February 2007.
• "Some results on the underlying paths and local convergence behavior of IPMs for SDLCPs", 1 hour talk, Workshop on Duality and Conic Optimization, Tsinghua University, Beijing, China, December 2006.
• "Conic optimization - Some developments in semi-definite programming", 1 hour presentation, Brown Bag Seminar, The Logistics Institute - Asia Pacific, Singapore, April 2006.
• "Second order cone program in relation to interior point method", 20 minutes presentation, International Conference on Scientific and Engineering Computation (IC-SEC'04), Singapore, June 2004.

Publications

Refereed Publications:

• E.P. Chew, L.H. Lee & C.K. Sim, "The impact of supply chain visibility when lead time is random", OR Spectrum, published online: May 2011.
• M. Chou, C.K. Sim, C.-P. Teo & H. Zheng, "Newsvendor pricing problem in a two-sided market", Production and Operations Management, Vol. 21(2012), pp. 204-208.
• C.K. Sim, "Superlinear convergence of an infeasible predictor-corrector path-following interior point algorithm for a semidefinite linear complementarity problem using the Helmberg-Kojima-Monteiro direction", SIAM Journal on Optimization, Vol. 21(2011), pp. 102-126.
• C.K. Sim, "Asymptotic behavior of underlying NT paths in interior point methods for monotone semidefinite linear complementarity problems", Journal of Optimization Theory and Applications, Vol. 148(2011), pp. 79-106.
• C.K. Sim, "On the analyticity of underlying HKM paths for monotone semidefinite linear complementarity problems", Journal of Optimization Theory and Applications, Vol. 141(2009), pp. 193-215.
• C.K. Sim & G. Zhao, "Asymptotic behavior of Helmberg-Kojima-Monteiro (HKM) paths in interior point methods for monotone semidefinite linear complementarity problems: general theory", Journal of Optimization Theory and Applications, Vol. 137(2008), pp. 11-25.
• C.K. Sim & G. Zhao, "Underlying paths in interior point methods for the monotone semidefinite linear complementarity problem", Mathematical Programming, Series A, Vol. 110(2007), pp. 475-499.
• C.K. Sim, J. Sun & D. Ralph, "A note on the lipschitz continuity of the gradient of the squared norm of the matrix-valued Fischer-Burmeister function", Mathematical Programming, Series A, Vol. 107(2006), pp. 547-553.
• C.K. Sim & G. Zhao, "A note on treating a second order cone program as a special case of a semidefinite program", Mathematical Programming, Series A, Vol. 102(2005), pp. 609-613.

Conference Papers:

• C.K. Sim, "Second order cone prograrm in relation to interior point method", International Conference on Scientific and Engineering Computation (IC-SEC'04), June 2004.

Working and Submitted Papers

• C.K. Sim, "On finding a generalized lowest rank solution to a linear semi-definite feasibility problem".
• M. Chou, C.K. Sim & X.-M. Yuan, "Optimal policies for inventory systems with two types of product sharing common hardware platforms: single period and finite horizon".
• M. Chou, C.K. Sim & X.-M. Yuan, "Optimal policies for inventory systems with two types of product sharing common hardware platforms: infinite horizon".
• Y.H. Hu, C.K. Sim & X.Q. Yang, "Subgradient methods for convex optimization problems based on gradient sampling".

Notes

• The primal simplex method and the dual linear program.

Others

Computer Experience:

• Operating systems: Windows; Unix.
• Computer languages exposed to: Cobol; C; Visual Basic; Java; SQL; HTML.
• Mathematical softwares: Matlab; Latex.

Languages: