- MA144-01 (Integral Calculus and Differential Equations) - Spring 2014 (Southeast Missouri State University)
- MA350-01 (Differential Equations I) - Spring 2014 (Southeast Missouri State University)
- MA139-01 (Applied Calculus) - Fall 2013 (Southeast Missouri State University)
- MA550-70 (Differential Equations II) - Fall 2013 (Southeast Missouri State University)
- MATHEMATICS 1000 (Calculus I) - Winter 2012 (Memorial University of Newfoundland)
- MATHEMATICS 1000 (Calculus I) - Fall 2012 (Memorial University of Newfoundland)
- MATHEMATICS 1540 (Introductory Mathematics for Economists II) - Winter 2011 (York University)

- 2004 - 2009, PhD in Mathematics, City University of Hong Kong + University of Science and Technology of China (joint program)

Supervisor: Professor Roderick Wong & Professor Ti-Jun Xiao

Thesis: Uniform Asymptotics of the Meixner Polynomials and Some $q$-Orthogonal Polynomials - 2000 - 2004, BSc in Mathematics, University of Science and Technology of China

- 2013 - present, Assistant Professor, Southeast Missouri State University
- 2012 - 2013, Teaching Postdoctoral Fellow, Memorial University of Newfoundland
- 2010 - 2012, Postdoctoral Fellow, York University
- 2009 - 2010, Research Fellow, City University of Hong Kong

- Asymptotic Analysis: Discrete Laplace's method and saddle-point approximation; Nonlinear steepest-descent method and Riemann-Hilbert problem; Orthogonal polynomials and difference equations
- Differential Equations: Delay differential equations and finite dimensional reduction; Poisson-Nernst-Planck system and boundary layer problem; Reaction-diffusion system and traveling waves
- Mathematical Biology: Avian flu and migratory birds; Basic reproductive ratio and persistence theory; Real-time prediction of disease outbreak and Richards model

- C. Paulhus and X.-S. Wang, Global stability analysis of a delayed SIS epidemic model, Journal of Biological Dynamics (2014), DOI: 10.1080/17513758.2014.931474.
- X.-S. Wang, Asymptotics of delay differential equations via polynomials, Asymptotic Analysis, accepted.
- B. Costa Lima, M. R. Grasselli, X.-S. Wang and J. Wu, Destabilizing a stable crisis: Employment persistence and government intervention in macroeconomics, Structural Change and Economic Dynamics 30 (2014), 30-51.
- X.-S. Wang, D. He, J. J. Wylie and H. Huang, Singular perturbation solutions of steady-state Poisson-Nernst-Planck systems, Physical Review E 89 (2014), 022722.
- X. Shi, X.-S. Wang and N. Reid, Saddlepoint approximation of nonlinear moments, Statistica Sinica (2013), DOI: 10.5705/ss.2012.333.
- D. Dai, M. E. H. Ismail and X.-S. Wang, Plancherel-Rotach asymptotic expansion for some polynomials from indeterminate moment problems, Constructive Approximation (2013), 40 (2014) 61-104.
- X.-S. Wang and J. Wu, Periodic systems of delay differential equations and the dynamics of avian influenza. (Russian) Contemporary Mathematics. Fundamental Directions 45 (2012), 32-42.
- X.-S. Wang, H. Wang and J. Wu, Traveling waves of diffusive predator-prey systems: disease outbreak propagation, Discrete and Continuous Dynamical Systems - Series A 32 (2012), 3303-3324.
- X.-S. Wang and J. Wu, Seasonal migration dynamics: periodicity, transition delay and finite-dimensional reduction, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 468 (2012), 634-650.
- X.-S. Wang, J. Wu and Y. Yang, Richards model revisited: validation by and application to infection dynamics, Journal of Theoretical Biology 313 (2012), 12-19.
- X.-S. Wang and R. Wong, Asymptotics of orthogonal polynomials via recurrence relations, Analysis and Applications 10 (2012), 215-235.
- X.-S. Wang and J. Wu, Approximating periodic patterns and dynamic threshold for patchy model of migratory birds with delay, Canadian Applied Mathematics Quarterly 19 (2011), 275-292.
- X.-S. Wang and R. Wong, Global asymptotics of the Meixner polynomials, Asymptotic Analysis 75 (2011), 211-231.
- X.-S. Wang and R. Wong, Uniform asymptotics of some q-orthogonal polynomials, Journal of Mathematical Analysis and Applications 364 (2010), 79-87.
- X.-S. Wang, Asymptotics of the q-theta function. Communications in Mathematical Analysis 7 (2009), 50-54.
- X.-S. Wang and R. Wong, Discrete analogues of Laplace's approximation, Asymptotic Analysis 54 (2007), 165-180.

- 05/2014, Constructive Functions 2014 in honor of Ed Saff's 70th birthday, Vanderbilt University

Title: Asymptotics of hypergeometric orthogonal polynomials via difference equations - 10/2013, The Fourth International Conference on Mathematical Modeling and Analysis of Populations in Biological Systems, Texas Tech University

Title: Age-structure model with periodically distributed delay - 07/2013, The 5th Atlantic Association for Research in Mathematical Sciences (AARMS) Annual Workshop on Mathematical Biology, Memorial University of Newfoundland

Title: Pulsating waves of a partially degenerate reaction-diffusion system in a periodic habitat - 05/2013, International Conference on Approximation Theory and Applications, City University of Hong Kong

Title: Singular Perturbation Solutions of Steady-state Poisson-Nernst-Planck Systems - 03/2013, Departmental Colloquium, University of South Alabama

Title: Approximating Threshold Conditions for Bird Migration Dynamics - 01/2013, 2013 Joint Mathematics Meetings, San Diego Convention Center

Title (1st talk): Traveling waves of diffusive predator-prey systems: disease outbreak propagation

Title (2nd talk): Uniform asymptotics of some $q$-orthogonal polynomials

Title (3rd talk): Dynamic threshold of patch disease model for migratory birds (contributed talk) - 08/2012, The 4th Atlantic Association for Research in Mathematical Sciences (AARMS) Annual Workshop on Mathematical Biology, Dalhousie University

Title: Avian influenza, migratory birds and dynamical threshold - 06/2012, Sojourns in Nonlinear Economics, Fields Institute

Title: Persistence theory applied to Keen's model - a link between mathematical biology and mathematical economics - 06/2012, Canadian Applied and Industrial Mathematics Annual Meeting, Fields Institute

Title: Threshold dynamics of avian influenza spread - 02/2012, Departmental Colloquium, University of New Brunswick

Title: Avian influenza in migratory birds and basic reproductive ratio - 12/2011, International Workshop on Asymptotic Analysis, City University of Hong Kong

Title: Asymptotic analysis in biological mathematics - 11/2011, Departmental Colloquium, University of New Brunswick

Title: Traveling waves of a diffusive SIR model - 08/2011, The 3rd Atlantic Association for Research in Mathematical Sciences (AARMS) Annual Workshop on Mathematical Biology, Memorial University of Newfoundland

Title: Asymptotic analysis in migration ecology and simple SIR epidemiology - 08/2011, Departmental Colloquium, Memorial University of Newfoundland

Title: An intrinsic connection between Richards empirical model with SIR model - 07/2011, The 5th Geoffrey J. Butler Memorial Conference on Differential Equations and Population Biology, University of Alberta

Title: Approximating the extinction threshold of spatial dynamics of migratory birds - 07/2011, The 7th International Congress on Industrial and Applied Mathematics, Vancouver Convention Centre

Title: Asymptotic analysis in migration ecology and simple SIR epidemiology - 07/2011, Delay Differential Equations in Applications: Common Themes and Methods, University of British Columbia

Title: Approximating periodic patterns and principle Floquet multiplier for periodic DDEs from seasonal bird migration (poster) - 04/2011, International Conference on Special Functions in the 21st Century: Theory and Applications, National Institute of Standards and Technology

Title: Global asymptotics of the Meixner polynomials - 03/2010, The 13th International Conference on Approximation Theory, Vanderbilt University

Title: Asymptotics of orthogonal polynomials and order reduction method for difference equations - 06/2009, International Conference on Asymptotic Analysis and Infinite-dimensional Dynamical Systems, City University of Hong Kong

Title: Uniform asymptotics of the Meixner polynomials - 04/2009, Workshop on Constructive Approximation, Vanderbilt University

Title: Uniform asymptotics of the Meixner polynomials

- 01/2015, 2015 Joint Mathematics Meetings, San Antonio, Texas, Organizer of Special Session on Applications of Dynamical Systems to Biological Models.
- 08/2014, SIAM Conference on the Life Sciences, Sheraton Charlotte, Charlotte, North Carolina, Organizer of Mini-symposium on Recent Advances in Mathematical Epidemiology of Infectious Diseases.
- 10/2013, The Fourth International Conference on Mathematical Modeling and Analysis of Populations in Biological Systems, Texas Tech University, Session Moderator.
- 07/2011, The 5th Geoffrey J. Butler Memorial Conference on Differential Equations and Population Biology, University of Alberta, Session Coordinator.
- 2012 - 2013, Applied Dynamical Systems Seminars, Memorial University of Newfoundland, Organizer.
- 2011 - 2012, Centre for Disease Modelling (CDM) Group Meetings, York University, Coordinator.

- SIAM Conference on the Life Sciences, Sheraton Charlotte, Charlotte, North Carolina, August 4 - 7, 2014.
- International Conference on Applied Mathematics in honor of Professor Roderick S. C. Wong's 70th birthday, City University of Hong Kong, December 1 - 4, 2014.
- 2015 Joint Mathematics Meetings, San Antonio, January 10 - 13, 2015.
- AMS 2015 Spring Southeastern Sectional Meeting, University of Alabama in Huntsville, March 27 - 29, 2015.
- The 8th International Congress on Industrial and Applied Mathematics, Beijing, China, August 10 - 14, 2015.