Research

Published Papers (OR/OM Journals)

  1. Guodong Lyu, Mable C. Chou, Chung-Piaw Teo, Zhichao Zheng, Yuanguang Zhong, Stochastic knapsack revisited: The service level perspective, accepted for publication at Operations Research [pdf]

  2. Jiayi Liu, Jingui Xie, Kum-Khiong Yang, Zhichao Zheng, Effects of rescheduling on patient no-show behavior in outpatient clinics, Manufacturing & Service Operations Management, 2019, 21(4):780–797 [pdf web]

  3. Guodong Lyu, Wang-Chi Cheung, Mable C. Chou, Chung-Piaw Teo, Zhichao Zheng, Yuanguang Zhong, Capacity allocation in flexible production networks: Theory and applications, Management Science, 2019, 65(11):5091–5109[pdf web]

  4. Yuanguang Zhong, Zhichao Zheng, Mable C. Chou, Chung-Piaw Teo, Resource pooling and allocation policies to deliver differentiated service, Management Science, 2018, 64(4):1555–1573 [pdf web]

  5. Zhichao Zheng, Karthik Natarajan, Chung-Piaw Teo, Least squares approximation to the distribution of project completion times with Gaussian uncertainty, Operations Research, 2016, 64(6):1406–1421 [pdf web]

  6. Qingxia Kong, Chung-Yee Lee, Chung-Piaw Teo, Zhichao Zheng, Appointment sequencing: Why the smallest-variance-first rule may not be optimal, European Journal of Operations Research, 2016, 255(3): 809–821 [pdf web]

  7. Xiaobo Li, Karthik Natarajan, Chung-Piaw Teo, Zhichao Zheng, Distributionally robust mixed integer linear programs: Persistency models with applications, European Journal of Operational Research, 2014, 233(3): 459–473 [pdf web]

  8. Qingxia Kong, Chung-Yee Lee, Chung-Piaw Teo, Zhichao Zheng, Scheduling arrivals to a stochastic service delivery system using copositive cones, Operations Research, 2013, 61(3): 711–726 [pdf web]

  9. Karthik Natarajan, Chung-Piaw Teo, Zhichao Zheng, Mixed zero-one linear programs under objective uncertainty: A completely positive representation, Operations Research, 2011, 59(3): 713–728 [pdf web]

Published Papers (Medical Journals)

  1. Han Zhou, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Effect of Renin-angiotensin System Inhibitors on Acute Kidney Injury among Patients undergoing Cardiac Surgery: A Review and Meta-analysis, Seminars in Thoracic and Cardiovascular Surgery, in press, [web]

  2. Yuchong Zhang, Hai Wang, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Validation of Prognostic Accuracy of the SOFA Score, SIRS Criteria, and qSOFA Score for In-hospital Mortality among Cardiac-, Thoracic-, and Vascular-Surgery Patients Admitted to a Cardiothoracic Intensive Care Unit, Journal of Cardiac Surgery, 2020, 35(1):118–127 [web]

  3. Lei Wang, Yan-Bo Zeng, Jia-Yun Chen, Qian Luo, Rowan Wang, Ruijie Zhang, Zhichao Zheng, Yuan-Hang Dong, Wen-Bin Zou, Xiaoqing Xie, Yi-Qi Du, Zhao-Shen Li, A simple new scoring system for predicting the mortality of severe acute pancreatitis: A retrospective clinical study, Medicine, 2020, 99(23):e20646 [web]

  4. Jingui Xie, Guang Cheng, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, To extubate or not to extubate: risk factors for extubation failure and deterioration with further mechanical ventilation, Journal of Cardiac Surgery, 2019, 34(10):1004–1011 [web]

Working Papers

  1. Yunchao Xu, Karthik Natarajan, Chung-Piaw Teo, Zhichao Zheng, Tracking-error models for multiple benchmarks: Theory and empirical performance, revise and resubmit for 4th round of review at Operations Research [pdf]

  2. Abraham Zhang, Zhichao Zheng, Chung-Piaw Teo, Schedule reliability in liner shipping timetable design: A convex programming approach, under review at Transportation Research Part B: Methodological [pdf]

  3. Guang Cheng, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Extubation decision making with predictive information for mechanically ventilated patients in ICU, under review at Management Science [pdf]

  4. Tao Lu, Zhichao Zheng, Yuanguang Zhong, Maximizing the benefits of an on-demand workforce: Fill-rate-based allocation and coordination mechanisms, under preparation

  5. Jing Li, Mable C. Chou, Ming Dong, Zhichao Zheng, Optimizing colorectal cancer screening programs using a combination of faecal immunochemical tests and colonoscopy, under preparation

  6. Guang Cheng, Sarah Yini Gao, Yancheng Yuan, Chenxiao Zhang, Zhichao Zheng, On the test accuracy and effective control of the COVID-19 pandemic: A case study in Singapore, under review at INFORMS Journal on Applied Analytics

  7. Qian Luo, Yan He, Hai Wang, Zhichao Zheng, Estimating transition probabilities from data censored by treatment-effect-based policies, under preparation

  8. Sarah Yini Gao, Yan He, Ruijie Zhang, Zhichao Zheng, Optimizing initial screening for colorectal cancer detection with adherence behavior, under preparation

  9. Yan He, Qian Luo, Hai Wang, Zhichao Zheng, A predictive and prescriptive method to reduce repetitive diagnostic tests using real-time monitoring data for timely detection and treatment, under preparation

  10. Qingxia Kong, Chung-Piaw Teo, Zhichao Zheng, Appointment scheduling with unpunctual patient arrivals, under preparation

  11. Jiayi Liu, Jingui Xie, Zhichao Zheng, Kollengode Ramanathan, Haidong Luo, Theodoros Kofidis, Graeme MacLaren, Oon-Cheong Ooi, Efficacy of renal replacement therapy for patients with acute kidney injury in a cardiothoracic intensive care unit, under preparation

  12. Yan He, Qian Luo, Hai Wang, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Real-time estimated SOFA score with intervals: Improved early warning with estimated uncertainty in patient condition, under preparation

  13. Mairehaba Maimaitiming, Chenxiao Zhang, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon Cheong Ooi, Impact of restrictive transfusion strategy on thrombosis-related events: A meta-analysis and systematic review, under preparation

  14. Wenyu Zhao, Jingui Xie, Zhichao Zheng, Oon Cheong Ooi, Haidong Luo, Associations between hemoglobin A1c and deep sternal wound infection after undergoing coronary artery bypass grafting: A systematic review and meta-analysis, under preparation

  15. Wenyu Zhao, Yongjian Zhu, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon Cheong Ooi, The moderating effect of solar radiation on the association between human mobility and COVID-19 infection in Europe, under preparation

  16. Mairehaba Maimaitiming, Jingui Xie, Zhichao Zheng, Yongjian Zhu, Effect of the announcement of human-to-human transmission on teleconsultation services in China during COVID-19, under preparation

Conference Papers

  1. Arnd Schirrmann, Elaine Wong, Zhichao Zheng, Exploiting mataheuristics to strategize on performance-based logistics contracts for MRO services, 24th European Conference on Operational Research, Lisbon, Portugal, July 11–14, 2010 [pdf]

Research Students

  1. Yan He, PhD candidate in Business (Operations Management)

Research Grants

  1. PI, Optimal personalized medical intervention using predictive information in ICUs, Academic Research Fund (AcRF) Tier 2, Ministry of Education, Singapore, Fund No. MOE2019-T2-1-185, January 2020–December 2022, SGD620,532

  2. Co-PI, On the design of customized colorectal cancer screening policies to improve screening guideline compliance, Academic Research Fund (AcRF) Tier 1, Ministry of Education, Singapore, Fund No. C207MSS18B015, September 2018–August 2021, SGD74,945

  3. PI, Predictive data analytics and real-time risk monitoring for intensive care units, Academic Research Fund (AcRF) Tier 1, Ministry of Education, Singapore, Fund No. C207MSS16B016, April 2017–March 2020, SGD149,710

Research Projects

  1. National University Heart Centre, Singapore (NUHCS): Predictive Data Analytics and Real-Time Risk Monitoring for Intensive Care Units, 2016–present

  2. KK Women's and Children's Hospital (KKH): Appointment Scheduling Policy Recommendations to Reduce No-Show Rates, 2014–2018

  3. National University Hospital (NUH): Patient Flow and Queue in Medicine Clinic, 2014–2015

  4. EADS Innovation Works (Airbus Group Innovations-Singapore): Performance-Based Contracting and Spare Parts Management for Aircraft Maintenance Repair and Overhaul (MRO) Service, 2009–2012

  5. SingTel: Pricing Simulator for Corporate Business Marketing, 2010–2011

  6. National University Hospital (NUH): Workforce Scheduling with Electronic Prescriptions in the Outpatient Pharmacy, 2009–2010

Editorial Board

  1. Guest Associate Editor, Management Science, Special Issue in Data-Driven Prescriptive Analytics, 2018–present

  2. Associate Editor, Journal of Management Science and Engineering (international version of Journal of Management Sciences in China 管理科学学报), 2016–present

Professional Experience

  1. Visiting Professor, School of Statistics, Southwestern University of Finance and Economics, July, 2019

  2. Visiting Professor, College of Business, City University of Hong Kong, March 2017

  3. Visiting Professor, School of Management, University of Science and Technology of China, July 2016

  4. Visiting Professor, School of Business Administration, South China University of Technology, January 2016

  5. Visiting Professor, School of Management, University of Science and Technology of China, May 2014

  6. Visiting Professor, Department of Industrial Engineering and Logistics Management, Hong Kong University of Science and Technology, February to March 2014

  7. Visiting Professor, School of Business, Universidad Adolfo Ibáñez, January 2014

  8. Visiting Scholar, Department of Industrial Engineering and Logistics Management, Hong Kong University of Science and Technology, March 2012

Professional Service

  1. Judge, INFORMS HAS Student Paper Competition, 2021

  2. Reviewer, MSOM Healthcare Operations Management Special Interest Group Workshop, Alberta, Canada, 2020

  3. Session Chair, Recent Development in Theories of Distributionally Robust Optimization, Berlin, Germany, 2019

  4. Session Chair, Recent Development in Applications of Distributionally Robust Optimization, Berlin, Germany, 2019

  5. Session Co-Chair, Health Analytics and Operations Management, INFORMS Healthcare Conference, Cambridge, Massachusetts, U.S.A., 2019

  6. Reviewer, MSOM Healthcare Operations Management Special Interest Group Workshop, Singpaore, 2019

  7. Session Co-Chair, Inpatient Management, POMS Annual Conference, Washington D.C., U.S.A., 2019

  8. Judge, POMS-HK Best Student Paper Competition, 2019

  9. Session Co-chair, Healthcare Data Analytics, POMS-HK International Conference, Hong Kong, China Hong Kong, China, 2019

  10. Session Chair, Distributionally Robust Optimization - New Theory and Applications, International Symposium on Mathematical Programming, Bordeaux, France, 2018

  11. Session Chair, Healthcare Analytics and Operations Management, INFORMS International Meeting, Taipei, Taiwan, 2018

  12. Judge, POMS-HK Best Student Paper Competition, 2018

  13. Judge, POMS-HK Best Student Paper Competition, 2017

  14. Session Chair, Behavioral Operations Research, The Ninth Annual International Conference of CSAMSE, Hefei, Anhui, China, 2016

  15. Session Chair, Recent Advances and Applications of Robust Optimization, INFORMS International Meeting, Waikoloa, Hawaii, U.S.A., 2016

  16. Session Chair, Decision Making for Colorectal Cancer Screening and Treatment, INFORMS International Meeting, Waikoloa, Hawaii, U.S.A., 2016

  17. Session Chair, Sharing Economy and Operations, POMS Annual Conference, Orlando, Florida, U.S.A., 2016

  18. Session Chair, Healthcare Appointment Scheduling, POMS-HK International Conference, Macau, China, 2016

  19. Session Chair, Scheduling and Operations Management in Healthcare, POMS International Conference, Singapore, 2014

  20. Session Chair, Integer Programming Applications, INFORMS Annual Meeting, Phoenix, Arizona, U.S.A., 2012

  21. Session Co-chair, Healthcare Operations: Appointment Scheduling, POMS Annual Conference, Chicago, Illinois, U.S.A., 2012