Xiang-Sheng Wang

(CV, updated August 21, 2026)

• 2009, Ph.D. in Mathematics, City University of Hong Kong (jointly awarded by University of Science and Technology of China)
    Dissertation: Uniform Asymptotics of the Meixner Polynomials and Some q-Orthogonal Polynomials
• 2004, B.Sc. in Mathematics, University of Science and Technology of China

• 2022 - Present, Associate Professor, University of Louisiana at Lafayette
• 2016 - 2022, Assistant Professor, University of Louisiana at Lafayette
• 2013 - 2016, 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

1. [♠♥] D. Dai, M. E. H. Ismail, and X.-S. Wang, Orthogonal polynomials with periodic recurrence coefficients, Analysis and Applications 24 (2026), 937-961.
2. [♣] X. Shi, X.-S. Wang, A. Wong, and W. Lin, Approximate inference with exponential tilting densities: Theory and applications, Statistical Science 41 (2026), 386-399.
3. [♦♣] H. Shu, S. Xin, X.-S. Wang, and J. Yu, Joint impact of diffusion and advection on predator-prey dynamics with delay and fear effect, SIAM Journal on Applied Mathematics 86 (2026), 76-103.
4. [♠] X.-S. Wang and C. Wang, Machine Learning in Data Processing, Forum for Interdisciplinary Mathematics, Springer, Cham, 2026.
5. [♠♥] X.-S. Wang and R. S. C. Wong, Asymptotic Analysis, Series in Analysis, vol. 7, World Scientific Publishing Co., Singapore, 2026.
6. [♦♣] W. Xu, H. Shu, L. Wang, X.-S. Wang, and J. Yu, Complex spatiotemporal dynamics in a diffusive intraguild predation model with digestion delay, Journal of Differential Equations 461 (2026), 114107.
7. [♦♣] S. Xin, H. Shu, Y. Lou, and X.-S. Wang, Global dynamics of a fear-induced predator-prey model with age structure and advection, Studies in Applied Mathematics 156 (2026), e70219.
8. [♠♦♣] Y. Chen, X.-M. Gu, J. Liu, and X.-S. Wang, A lumped ODE model for metastatic cancer treatment, ScienceAsia 51S (2025), 1-11.
9. [♦♣] J. E. Mahbuba and X.-S. Wang, Stability analysis of biological systems under threshold conditions, Symmetry 17 (2025), 1193.
10. [♦♣] X. Pan, H. Shu, L. Wang, X.-S. Wang, and J. Yu, On the periodic solutions of switching scalar dynamical systems, Journal of Differential Equations 415 (2025), 365-382.
11. [♦♣] M. Pupulin, X.-S. Wang, M. A. Efendiev, T. Giletti, and H. J. Eberl, A PDE-ODE coupled spatio-temporal mathematical model for fire blight during bloom, Journal of Mathematical Biology 91 (2025), 67.
12. [♦♣] M. M. Rahaman and X.-S. Wang, Threshold dynamics of honey bee colonies with general eclosion and social inhibition, Axioms 14 (2025), 773.
13. [♦♣] X. Wu, W. Zhang, X.-S. Wang, and J. Li, A mechanistic model-to-model approach for solving a nonlinear pharmacokinetic model, Bulletin of the Malaysian Mathematical Sciences Society 48 (2025), 53.
14. [♠♥] D. Dai, M. E. H. Ismail, and X.-S. Wang, From continuous to discrete: weak limit of normalized Askey-Wilson measure, The Ramanujan Journal 64 (2024), 227-252.
15. [♦♣] J. Deng, H. Shu, S. Tang, L. Wang, and X.-S. Wang, Coexistence or extinction: Dynamics of multiple lizard species with competition, dispersal and intraguild predation, Journal of Mathematical Biology 89 (2024), 65.
16. [♦♣] K. Sarkar and X.-S. Wang, Data fixing by data fitting: Estimating the unreported cases during the early COVID-19 outbreak in Hubei, China, Journal of Basic & Applied Sciences 20 (2024), 92-97.
17. [♦♣] H. Shu, H.-Y. Jin, X.-S. Wang, and J. Wu, Viral infection dynamics with immune chemokines and CTL mobility modulated by the infected cell density, Journal of Mathematical Biology 88 (2024), 43.
18. [♠♣] C. Wang, L. Chang, X.-S. Wang, B. Zhang, and A. Stein, Interferometric synthetic aperture radar statistical inference in deformation measurement and geophysical inversion: A review, IEEE Geoscience and Remote Sensing Magazine 12 (2024), 8-35.
19. [♠♣] C. Wang, C. Zhu, X.-S. Wang, W. Tu, and Q. Li, A new object-oriented SAR interferometry framework for monitoring urban deformation, IEEE Transactions on Geoscience and Remote Sensing 62 (2024), 1-11.
20. [♦♣] J. Deng, H. Shu, L. Wang, and X.-S. Wang, Viral dynamics with immune responses: Effects of distributed delays and Filippov antiretroviral therapy, Journal of Mathematical Biology 86 (2023), 37.
21. [♠♦] Y. He, J. Liu, and X.-S. Wang, Optimized sparse approximate inverse smoothers for solving Laplacian linear systems, Linear Algebra and its Applications 656 (2023), 304-323.
22. [♠♦] Y. Jiang, J. Liu, and X.-S. Wang, A direct parallel-in-time quasi-boundary value method for inverse space-dependent source problems, Journal of Computational and Applied Mathematics 423 (2023), 114958.
23. [♠♦♣] J. Liu and X.-S. Wang, Dynamic optimal allocation of medical resources: a case study of face masks during the first COVID-19 epidemic wave in the United States, Mathematical Biosciences and Engineering 20 (2023), 12472-12485.
24. [♠♥] W. Shi, G. Nemes, X.-S. Wang, and R. Wong, Error bounds for the asymptotic expansions of the Hermite polynomials, Proceedings of the Royal Society of Edinburgh Section A: Mathematics 153 (2023), 417-440.
25. [♠♦♣] H. Shu, X. Pan, X.-S. Wang, and B. Wade, Traveling waves of nonlocal delayed disease models: Critical wave speed and propagation speed, Applicable Analysis 102 (2023), 385-405.
26. [♦] Y. Wang, M. Li, X.-S. Wang, A. Gildersleeve, and N. Turki, ATRP kinetic simulator: An online open resource educational tool using Jupyter notebook and Google Colaboratory, Journal of Chemical Education 100 (2023), 2770-2775.
27. [♦♣] W. Xu, H. Shu, L. Wang, X.-S. Wang, and J. Watmough, The importance of quarantine: modelling the COVID-19 testing process, Journal of Mathematical Biology 86 (2023), 81.
28. [♠♥] L. Cao, S. Ghimire, and X.-S. Wang, Bivariate Lagrange interpolation at the checkerboard nodes, Proceedings of the American Mathematical Society 150 (2022), 2153-2163.
29. [♠♦♥] J. Liu, X.-S. Wang, S.-L. Wu, and T. Zhou, A well-conditioned direct PinT algorithm for first- and second-order evolutionary equations, Advances in Computational Mathematics 48 (2022), 16.
30. [♣♥] X. Shi, X.-S. Wang, and N. Reid, A new class of weighted CUSUM statistics, Entropy 24 (2022), 1652.
31. [♠♣] X. Shi, X.-S. Wang, and A. Wong, Explicit Gaussian variational approximation for the Poisson lognormal mixed model, Mathematics 10 (2022), 4542.
32. [♦♣] H. Shu, W. Xu, X.-S. Wang, and J. Wu, Spatiotemporal patterns of a structured spruce budworm diffusive model, Journal of Differential Equations 336 (2022), 427-455.
33. [♠♣] C. Wang, X.-S. Wang, Y. Xu, B. Zhang, M. Jiang, S. Xiong, Q. Zhang, W. Li, and Q. Li, A new likelihood function for consistent phase series estimation in distributed scatterer interferometry, IEEE Transactions on Geoscience and Remote Sensing 60 (2022), 5227314.
34. [♦♣] X. Zhang, F. Scarabel, X.-S. Wang, and J. Wu, Global continuation of periodic oscillations to a diapause rhythm, Journal of Dynamics and Differential Equations 34 (2022), 2819-2839.
35. [♦♣] S. Ghimire and X.-S. Wang, Competition and cooperation on predation: Bifurcation theory of mutualism, Journal of Biological Systems 29 (2021), 49-73.
36. [♦♣] S. Ghimire and X.-S. Wang, Traveling waves in cooperative predation: Relaxation of sublinearity, Mathematics in Applied Sciences and Engineering 2 (2021), 22-31.
37. [♦♣] H. Shu, Z. Ma, and X.-S. Wang, Threshold dynamics of a nonlocal and delayed cholera model in a spatially heterogeneous environment, Journal of Mathematical Biology 83 (2021), 41.
38. [♠♦♣] C. J. Browne, X. Pan, H. Shu, and X.-S. Wang, Resonance of periodic combination antiviral therapy and intracellular delays in virus model, Bulletin of Mathematical Biology 82 (2020), 29.
39. [♠♥] D. Dai, M. E. H. Ismail, and X.-S. Wang, On a Ramanujan type entire function and its zeros, Journal of Mathematical Analysis and Applications 485 (2020), 123856.
40. [♠♥] Y.-T. Li, X.-S. Wang, and R. Wong, Asymptotics of the Wilson polynomials, Analysis and Applications 18 (2020), 237-270.
41. [♠♥] W. Long, D. Dai, Y.-T. Li, and X.-S. Wang, Asymptotics of orthogonal polynomials with asymptotic Freud-like weights, Studies in Applied Mathematics 144 (2020), 133-163.
42. [♦♣] H. Shu, Z. Ma, X.-S. Wang, and L. Wang, Viral diffusion and cell-to-cell transmission: Mathematical analysis and simulation study, Journal de Mathématiques Pures et Appliquées 137 (2020), 290-313.
43. [♦♣] H. Shu, W. Xu, X.-S. Wang, and J. Wu, Complex dynamics in a delay differential equation with two delays in tick growth with diapause, Journal of Differential Equations 269 (2020), 10937-10963.
44. [♥] D. Dai, M. E. H. Ismail, and X.-S. Wang, Doubly infinite Jacobi matrices revisited: Resolvent and spectral measure, Advances in Mathematics 343 (2019), 157-192.
45. [♠♥] D. Dai, M. E. H. Ismail, and X.-S. Wang, Asymptotics of partition functions in a fermionic matrix model and of related q-polynomials, Studies in Applied Mathematics 142 (2019), 91-105.
46. [♠♦♥] W. W. Hager, H. Hou, S. Mohapatra, A. V. Rao, and X.-S. Wang, Convergence rate for a Radau hp collocation method applied to constrained optimal control, Computational Optimization and Applications 74 (2019), 275-314.
47. [♠♥] X.-M. Huang, L. Cao, and X.-S. Wang, Asymptotic expansion of orthogonal polynomials via difference equations, Journal of Approximation Theory 239 (2019), 29-50.
48. [♦♣] X.-M. Huang and X.-S. Wang, Traveling waves of diffusive disease models with time delay and degeneracy, Mathematical Biosciences and Engineering 16 (2019), 2391-2410.
49. [♥] M. E. H. Ismail and X.-S. Wang, On quasi-orthogonal polynomials: Their differential equations, discriminants and electrostatics, Journal of Mathematical Analysis and Applications 474 (2019), 1178-1197.
50. [♠♦♣] J. Liu and X.-S. Wang, Numerical optimal control of a size-structured PDE model for metastatic cancer treatment, Mathematical Biosciences 314 (2019), 28-42.
51. [♦♣] X. Pan, H. Shu, L. Wang, and X.-S. Wang, Dirichlet problem for a delayed diffusive hematopoiesis model, Nonlinear Analysis: Real World Applications 48 (2019), 493-516.
52. [♦♣] H. Shu, X. Pan, X.-S. Wang, and J. Wu, Traveling waves in epidemic models: non-monotone diffusive systems with non-monotone incidence rates, Journal of Dynamics and Differential Equations 31 (2019), 883-901.
53. [♠♦] S. Venkatesh, T. Li, X.-S. Wang, C.-C. Yeung, K. Pei, Q.-J. Sun, W. Wu, R. K. Y. Li, M. H. W. Lam, P. K. L. Chan, J. J. Wylie, and V. A. L. Roy, Dual-gated transistor platform for on-site detection of lead ions at trace levels, Analytical Chemistry 90 (2018), 7399-7405.
54. [♠♦♥] W. W. Hager, J. Liu, S. Mohapatra, A. V. Rao, and X.-S. Wang, Convergence rate for a Gauss collocation method applied to constrained optimal control, SIAM Journal on Control and Optimization 56 (2018), 1386-1411.
55. [♠♥] X.-S. Wang and R. Wong, Asymptotics of Racah polynomials with fixed parameters, Proceedings of the American Mathematical Society 146 (2018), 1083-1096.
56. [♦♣] H. Shu and X.-S. Wang, Global dynamics of a coupled epidemic model, Discrete and Continuous Dynamical Systems - Series B 22 (2017), 1575-1585.
57. [♠♣] X. Shi, X.-S. Wang, D. Wei, and Y. Wu, A sequential multiple change-point detection procedure via VIF regression, Computational Statistics 31 (2016), 671-691.
58. [♦♣] H. Wang and X.-S. Wang, Traveling wave phenomena in a Kermack-McKendrick SIR model, Journal of Dynamics and Differential Equations 28 (2016), 143-166.
59. [♠♥] X.-S. Wang, Asymptotic analysis of difference equations with quadratic coefficients, Methods and Applications of Analysis 23 (2016), 155-172.
60. [♠♥] X.-S. Wang and R. Wong, Asymptotics of Racah polynomials with varying parameters, Journal of Mathematical Analysis and Applications 436 (2016), 1149-1164.
61. [♠♥] D. Dai, W. Hu, and X.-S. Wang, Uniform asymptotics of orthogonal polynomials arising from coherent states, Symmetry, Integrability and Geometry: Methods and Applications 11 (2015), 070, 17 pages.
62. [♦♣] C. Paulhus and X.-S. Wang, Global stability analysis of a delayed SIS epidemic model, Journal of Biological Dynamics 9 (2015), suppl. 1, 45-50.
63. [♦♣] X.-S. Wang and X.-Q. Zhao, Pulsating waves of a partially degenerate reaction-diffusion system in a periodic habitat, Journal of Differential Equations 259 (2015), 7238-7259.
64. [♦♣] X.-S. Wang and L. Zhong, Ebola outbreak in West Africa: Real-time estimation and multiple-wave prediction, Mathematical Biosciences and Engineering 12 (2015), 1055-1063.
65. [♠♦] 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.
66. [♠♥] D. Dai, M. E. H. Ismail, and X.-S. Wang, Plancherel-Rotach asymptotic expansion for some polynomials from indeterminate moment problems, Constructive Approximation 40 (2014), 61-104.
67. [♠♣] X. Shi, X.-S. Wang, and N. Reid, Saddlepoint approximation of nonlinear moments, Statistica Sinica 24 (2014), 1597-1611.
68. [♠♥] X.-S. Wang, Plancherel-Rotach asymptotics of second-order difference equations with linear coefficients, Journal of Approximation Theory 188 (2014), 1-18.
69. [♠♦] X.-S. Wang, Asymptotics of delay differential equations via polynomials, Asymptotic Analysis 90 (2014), 83-103.
70. [♠♦] 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.
71. [♦♣] 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.
72. [♠♥] X.-S. Wang and R. Wong, Asymptotics of orthogonal polynomials via recurrence relations, Analysis and Applications 10 (2012), 215-235.
73. [♠♦♣] 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. English version: Journal of Mathematical Sciences 201 (2014), 693-704.
74. [♠♦♣] 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.
75. [♦♣] 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.
76. [♠♥] X.-S. Wang and R. Wong, Global asymptotics of the Meixner polynomials, Asymptotic Analysis 75 (2011), 211-231.
77. [♠♦♣] 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.
78. [♠♥] X.-S. Wang and R. Wong, Uniform asymptotics of some q-orthogonal polynomials, Journal of Mathematical Analysis and Applications 364 (2010), 79-87.
79. [♠♥] X.-S. Wang, Asymptotics of the q-theta function, Communications in Mathematical Analysis 7 (2009), 50-54.
80. [♠♥] X.-S. Wang and R. Wong, Discrete analogues of Laplace's approximation, Asymptotic Analysis 54 (2007), 165-180.

• June 5-7, 2026, Symposium on Mathematical Modeling and Data Analysis in Biosystems, Shaanxi University of Science and Technology
  Title: Coexistence or extinction: Dynamics of multiple lizard species with competition, dispersal and intraguild predation
• January 4-7, 2026, Joint Mathematics Meetings, Washington, D.C.
  Title: Intraguild predation dynamics of multiple lizard species with competition and dispersal
• October 3-5, 2025, AMS Fall Southeastern Sectional Meeting, Tulane University
  Title: Existence and stability of periodic solutions of switching dynamical systems
• March 14-15, 2025, Scientific Computation Around Louisiana, Tulane University
  Title: Classical orthogonal polynomials in numerical computations
• January 8-11, 2025, Joint Mathematics Meetings, Seattle, Washington
  Title: Viral infection dynamics with cell-to-cell transmission and immune chemokines
• November 23-25, 2024, Workshop on Differential Equations and Mathematical Biology In honor of Professor Shigui Ruan's 60th Birthday, University of Miami
  Title: Periodic solutions of switching scalar dynamical systems
• June 3-6, 2024, International Conference on Analysis and Applications in honor of Professor Roderick S. C. Wong's 80th birthday, City University of Hong Kong
  Title: Error bounds for the asymptotic expansions of the Jacobi polynomials
• April 25-27, 2024, Workshop on Reaction-Diffusion Equations, Zhejiang Normal University
  Title: Threshold dynamics of a nonlocal and delayed cholera model in a spatially heterogeneous environment
• April 1-2, 2023, AMS Spring Eastern Virtual Sectional Meeting, Online
  Title: Global analysis of a delayed cholera model with nonlocal spatial heterogeneity
• March 18-19, 2023, AMS Spring Southeastern Sectional Meeting, Georgia Institute of Technology
  Title: Global dynamics of a delayed viral infection model with immune responses and two infection modes
• January 4-7, 2023, Joint Mathematics Meetings, Boston, Massachusetts
  Title: Spatiotemporal patterns of a structured spruce budworm diffusive model
• November 4-6, 2022, SIAM Texas-Louisiana Sectional Meeting, University of Houston
  Title: Global dynamics of a cholera model with two nonlocal and delayed transmission mechanisms
• October 1-2, 2022, The 7th Annual Meeting of SIAM Central States Section, Oklahoma State University
  Title: The condition number of a Vandermonde-like matrix arising from a direct parallel-in-time algorithm
• June 13-17, 2022, The 16th International Symposium on Orthogonal Polynomials, Special Functions and Applications, Online
  Title: Applications of orthogonal polynomials in parallel computation and numerical integration
• April 6-9, 2022, Joint Mathematics Meetings, Online
  Title: Threshold dynamics of a nonlocal and delayed cholera model in a spatially heterogeneous environment
• January 10-14, 2022, The 9th International Conference on Computational Methods and Function Theory, Online
  Title: Applications of orthogonal polynomials in numerical analysis
• December 2-7, 2021, Canadian Mathematical Society Winter Meeting, Online
  Title (1st talk): Global analysis of a viral infection model with cell-to-cell transmission and immune chemokines
  Title (2nd talk): Error bounds for the asymptotic expansions of the Hermite polynomials
• January 6-9, 2021, Joint Mathematics Meetings, Online
  Title: Complex dynamics in a delay differential equation with two delays in tick growth with diapause
• October 16-18, 2020, SIAM Texas-Louisiana Sectional Meeting, Online
  Title: Resonance of periodic combination antiviral therapy and intracellular delays in virus model
• January 15-18, 2020, Joint Mathematics Meetings, Denver, Colorado
  Title: Optimal control of a size-structured model for metastatic cancer treatment
• July 1-5, 2019, Workshop on Mathematical Modeling and Analysis of Population Dynamics, Guangzhou University
  Title: Dirichlet problem for a delayed diffusive hematopoiesis model
• May 24-26, 2019, Workshop on Differential Equations with Applications, Chang'an University
  Title: Multiple-scale analysis in an ion channel model
• February 15-16, 2019, Scientific Computation Around Louisiana, Tulane University
  Title: Numerical optimal control of a size-structured PDE model for metastatic cancer treatment
• December 7-10, 2018, Canadian Mathematical Society Winter Meeting, Vancouver, Canada
  Title: Asymptotic analysis of difference equations
• October 5-7, 2018, SIAM Texas-Louisiana Sectional Meeting, Louisiana State University
  Title: Viral dynamics revisited: partial degeneracy and spatial heterogeneity
• July 25-August 15, 2018, Summer Research Institute on q-Series, Nankai University
  Title: On quasi-orthogonal polynomials
• July 10-11, 2018, PDEs from Biology, Ecology and Life Sciences: Models and Analysis, Hong Kong Polytechnic University
  Title: Steady-state and dynamical solutions of Poisson-Nernst-Planck systems
• July 5-9, 2018, The 12th AIMS Conference on Dynamical Systems, Differential Equations and Applications, Taipei, Taiwan
  Title: Joint impact of cell-free and cell-to-cell transmissions in viral dynamics
• June 8-10, 2018, The Twelfth International Conference on Recent Advances in Applied Dynamical Systems, Chongqing Normal University
  Title: Dynamics of an ion channel model
• June 4-8, 2018, International Conference on Applied Mathematics, City University of Hong Kong
  Title: Asymptotic analysis of time-dependent Poisson-Nernst-Planck systems
• January 10-13, 2018, Joint Mathematics Meetings, San Diego, California
  Title: Traveling waves in epidemic models: non-monotone diffusive systems with non-monotone incidence rates
• August 28-September 1, 2017, Workshop on Wave Transport of Ionic Species, Fields Institute
  Title: The dynamics of Poisson-Nernst-Planck systems
• June 5-9, 2017, International Conference on Special Functions: Theory, Computation, and Applications, City University of Hong Kong
  Title: Asymptotic expansion of orthogonal polynomials via difference equations
• June 2-5, 2017, China-Canada International Conference on Disease Modelling, Shanghai University
  Title: Global dynamics of a coupled epidemic model
• January 4-7, 2017, Joint Mathematics Meetings, Atlanta, Georgia
  Title: Age-structure model with periodic mature probability
• December 12-16, 2016, Mathematical Modelling and Computation in Medicine/Biology, Yau Mathematical Sciences Center
  Title: Computation of dynamic thresholds for bird migration models
• May 30-June 2, 2016, International Conference on Applied Mathematics, City University of Hong Kong
  Title: Asymptotic solutions of linear difference equations
• January 6-9, 2016, Joint Mathematics Meetings, Seattle, Washington
  Title: Asymptotic analysis of difference equations
• October 2-4, 2015, The 5th International Conference on Mathematical Modeling and Analysis of Populations in Biological Systems, Western University
  Title: Transmission dynamics of avian influenza
• August 10-14, 2015, The 8th International Congress on Industrial and Applied Mathematics, Beijing, China
  Title: Asymptotic analysis of associated orthogonal polynomials via three-term recurrence relations
• April 11-12, 2015, The 1st Annual Meeting of SIAM Central States Section, Missouri University of Science and Technology
  Title: A population model with age structure and periodically distributed time delay
• January 10-13, 2015, Joint Mathematics Meetings, San Antonio, Texas
  Title: Periodic systems of delay differential equations and the dynamics of avian influenza
• December 1-5, 2014, International Conference on Applied Mathematics in honor of Professor Roderick S. C. Wong's 70th birthday, City University of Hong Kong
  Title: Plancherel-Rotach asymptotics of second-order difference equations with linear coefficients
• August 4-7, 2014, SIAM Conference on the Life Sciences, Charlotte, North Carolina
  Title: Basic reproductive ratios in ecosystems and disease models
• May 26-30, 2014, Constructive Functions 2014 in honor of Ed Saff's 70th birthday, Vanderbilt University
  Title: Asymptotics of hypergeometric orthogonal polynomials via difference equations
• October 4-6, 2013, The 4th International Conference on Mathematical Modeling and Analysis of Populations in Biological Systems, Texas Tech University
  Title: Age-structure model with periodically distributed delay
• July 27-29, 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
• May 20-24, 2013, International Conference on Approximation Theory and Applications, City University of Hong Kong
  Title: Singular perturbation solutions of steady-state Poisson-Nernst-Planck systems
• January 9-12, 2013, Joint Mathematics Meetings, San Diego, California
  Title (1st talk): Traveling waves of diffusive predator-prey systems: disease outbreak propagation
  Title (2nd talk): Uniform asymptotics of some q-orthogonal polynomials
  
• August 18-19, 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
• June 5-July 3, 2012, Sojourns in Nonlinear Economics, Fields Institute
  Title: Persistence theory applied to Keen's model - a link between mathematical biology and mathematical economics
• June 24-28, 2012, Canadian Applied and Industrial Mathematics Annual Meeting, Fields Institute
  Title: Threshold dynamics of avian influenza spread
• December 10-11, 2011, International Workshop on Asymptotic Analysis, City University of Hong Kong
  Title: Asymptotic analysis in biological mathematics
• August 13-14, 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
• July 25-30, 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
• July 18-22, 2011, The 7th International Congress on Industrial and Applied Mathematics, Vancouver, Canada
  Title: Asymptotic analysis in migration ecology and simple SIR epidemiology
• April 6-8, 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
• March 7-10, 2010, The 13th International Conference on Approximation Theory, San Antonio, Texas
  Title: Asymptotics of orthogonal polynomials and order reduction method for difference equations
• June 19-22, 2009, International Conference on Asymptotic Analysis and Infinite-dimensional Dynamical Systems, City University of Hong Kong
  Title: Uniform asymptotics of the Meixner polynomials
• April 27 - May 1, 2009, Shanks Workshop on Constructive Approximation, Vanderbilt University
  Title: Uniform asymptotics of the Meixner polynomials

• April 3-4, 2027, AMS Spring Western Virtual Sectional Meeting, Online, Co-Organizer (with Daozhou Gao) of Special Session on Advances in Mathematical Modeling and Analysis of Biological Dynamics.
• January 4-7, 2026, Joint Mathematics Meetings, Washington, D.C., Co-Organizer (with Daozhou Gao, Yun Kang, Michael Andrew Robert, and Suzanne Robertson) of Special Session on Advances in Ecological and Epidemiological Models: Analysis and Application.
• October 3-5, 2025, AMS Fall Southeastern Sectional Meeting, Tulane University, Co-Organizer (with Guihong Fan) of Special Session on Analysis of Mathematical Models in Life Sciences.
• January 8-11, 2025, Joint Mathematics Meetings, Seattle, Washington, Co-Organizer (with Daozhou Gao) of Special Session on Advances in Modeling and Analysis in Life Sciences.
• September 14-15, 2024, AMS Fall Central Sectional Meeting, University of Texas at San Antonio, Co-Organizer (with Bruce A. Wade, Qin Sheng, Abdul Q. M. Khaliq, Jaeun Ku, and Yangwen Zhang) of Special Session on Advances in Mathematical and Numerical Analysis of Partial Differential Equations for Application-Oriented Computations.
• November 3-5, 2023, SIAM Texas-Louisiana Sectional Meeting, University of Louisiana at Lafayette, Organizing Committee Member.
• April 1-2, 2023, AMS Spring Eastern Virtual Sectional Meeting, Online, Co-Organizer (with Zilong Song) of Special Session on Recent Advances in Ion Channel Models and Poisson-Nernst-Planck Systems.
• March 18-19, 2023, AMS Spring Southeastern Sectional Meeting, Georgia Institute of Technology, Co-Organizer (with Jia Li and Yang Li) of Special Session on Mathematical Modeling of Populations and Disease Transmissions.
• January 4-7, 2023, Joint Mathematics Meetings, Boston, Massachusetts, Co-Organizer (with Zhisheng Shuai and Gail S. Wolkowicz) of Special Session on Complex Systems in the Life Sciences.
• November 4-6, 2022, SIAM Texas-Louisiana Sectional Meeting, University of Houston, Co-Organizer (with Zhuolin Qu and Lale Asik) of Mini-Symposium on Mathematical Modeling for Biological Dynamics.
• October 28-30, 2022, The Eighth International Conference on Mathematical Modeling and Analysis of Populations in Biological Systems, University of Louisiana at Lafayette, Organizing Committee Member.
• October 1-2, 2022, The 7th Annual Meeting of SIAM Central States Section, Oklahoma State University, Co-Organizer (with Qin Sheng and Bruce A. Wade), Mini-Symposium on Recent Advances in Application-oriented Numerical Computation and Optimization.
• April 6-9, 2022, Joint Mathematics Meetings, Online, Co-Organizer (with Yang Li and Hongying Shu) of Special Session on Applications of Mathematical Models and Dynamical Systems in Biology.
• December 2-7, 2021, Canadian Mathematical Society Winter Meeting, Online, Co-Organizer (with Yu-Tian Li and Zilong Song) of Special Session on Asymptotic Analysis, Orthogonal Polynomials, and Special Functions.
• October 16-18, 2020, SIAM Texas-Louisiana Sectional Meeting, Online, Organizer of Mini-Symposium on Dynamical Systems and Mathematical Biology.
• January 15-18, 2020, Joint Mathematics Meetings, Denver, Colorado, Co-Organizer (with Aijun Zhang) of Special Session on Differential and Difference Equations in Biological Dynamics.
• December 7-10, 2018, Canadian Mathematical Society Winter Meeting, Vancouver, Canada, Co-Organizer (with Chunhua Ou) of Special Session on Asymptotic Analysis and Applications.
• October 5-7, 2018, SIAM Texas-Louisiana Sectional Meeting, Louisiana State University, Organizer of Mini-Symposium on Modeling, Analysis, and Computation in Mathematical Biology.
• July 5-8, 2018, The 12th AIMS Conference on Dynamical Systems, Differential Equations and Applications, Taipei, Taiwan, Co-Organizer (with Yijun Lou, Hongying Shu, and Xiaotian Wu) of Special Session on Dynamical Systems with Applications to Population Biology.
• January 10-13, 2018, Joint Mathematics Meetings, San Diego, California, Co-Organizer (with Abey Lopez-Garcia) of Special Session on Orthogonal Polynomials and Applications.
• January 4-7, 2017, Joint Mathematics Meetings, Atlanta, Georgia, Co-Organizer (with Yanyu Xiao) of Special Session on Analytical and Computational Studies in Mathematical Biology.
• November 11-13, 2016, Organizing Committee Member, 2016 Lloyd Roeling Mathematics Conference, University of Louisiana at Lafayette.
• July 1-5, 2016, The 11th AIMS Conference on Dynamical Systems, Differential Equations and Applications, Orlando, Florida, Co-Organizer (with Nemanja Kosovalic) of Special Session on Differential Equations and Applications to Biological Models.
• January 6-9, 2016, Joint Mathematics Meetings, Seattle, Washington, Organizer of Special Session on Recent Advances in Orthogonal Polynomials and Special Functions.
• October 2-4, 2015, The 5th International Conference on Mathematical Modeling and Analysis of Populations in Biological Systems (ICMA-V), London, Ontario, Canada, Organizer of Mini-Symposium on Modelling Transmission Dynamics of Infectious Diseases.
• January 10-13, 2015, Joint Mathematics Meetings, San Antonio, Texas, Co-Organizer (with Yu Jin) of Special Session on Applications of Dynamical Systems to Biological Models.
• August 4-7, 2014, SIAM Conference on the Life Sciences, Sheraton Charlotte, Charlotte, North Carolina, Co-Organizer (with Guihong Fan) of Mini-Symposium on Recent Advances in Ecosystems and Disease Models.

• April 3-4, 2027, AMS Spring Western Virtual Sectional Meeting, Online