Xiang-Sheng Wang (ÍôÏèÉý)

(CV, updated on 1/8/2026)

• 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 (2026), accepted.
2. [♣] X. Shi, X.-S. Wang, A. Wong, and W. Lin, Approximate inference with exponential tilting densities: Theory and applications, Statistical Science (2026), accepted.
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. [♦♣] 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 (2026), accepted.
5. [♠♦♣] Y. Chen, X.-M. Gu, J. Liu, and X.-S. Wang, A lumped ODE model for metastatic cancer treatment, ScienceAsia 51S (2025), 1-11.
6. [♦♣] J. E. Mahbuba and X.-S. Wang, Stability analysis of biological systems under threshold conditions, Symmetry 17 (2025), 1193.
7. [♦♣] 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.
8. [♦♣] 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.
9. [♦♣] M. M. Rahaman and X.-S. Wang, Threshold dynamics of honey bee colonies with general eclosion and social inhibition, Axioms 14 (2025), 773.
10. [♦♣] 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.
11. [♠♥] D. Dai, M. E. H. Ismail, and X.-S. Wang, From continuous to discrete: weak limit of normalized Askey¨CWilson measure, The Ramanujan Journal 64 (2024), 227-252.
12. [♦♣] 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.
13. [♦♣] 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.
14. [♦♣] 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.
15. [♠♣] 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.
16. [♠♣] 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.
17. [♦♣] 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.
18. [♠♦] 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.
19. [♠♦] 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.
20. [♠♦♣] 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.
21. [♠♥] 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.
22. [♠♦♣] 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.
23. [♦] 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.
24. [♦♣] 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.
25. [♠♥] 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.
26. [♠♦♥] 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.
27. [♣♥] X. Shi, X.-S. Wang, and N. Reid, A new class of weighted CUSUM statistics, Entropy 24 (2022), 1652.
28. [♠♣] X. Shi, X.-S. Wang, and A. Wong, Explicit Gaussian variational approximation for the Poisson lognormal mixed model, Mathematics 10 (2022), 4542.
29. [♦♣] 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.
30. [♠♣] 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.
31. [♦♣] 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.
32. [♦♣] S. Ghimire and X.-S. Wang, Competition and cooperation on predation: Bifurcation theory of mutualism, Journal of Biological Systems 29 (2021), 49-73.
33. [♦♣] S. Ghimire and X.-S. Wang, Traveling waves in cooperative predation: Relaxation of sublinearity, Mathematics in Applied Sciences and Engineering 2 (2021), 22-31.
34. [♦♣] 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.
35. [♠♦♣] 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.
36. [♠♥] 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.
37. [♠♥] Y.-T. Li, X.-S. Wang, and R. Wong, Asymptotics of the Wilson polynomials, Analysis and Applications 18 (2020), 237-270.
38. [♠♥] 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.
39. [♦♣] 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.
40. [♦♣] 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.
41. [♥] 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.
42. [♠♥] 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.
43. [♠♦♥] 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.
44. [♠♥] 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.
45. [♦♣] 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.
46. [♥] 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.
47. [♠♦♣] 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.
48. [♦♣] 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.
49. [♦♣] 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.
50. [♠♦] 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.
51. [♠♦♥] 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.
52. [♠♥] X.-S. Wang and R. Wong, Asymptotics of Racah polynomials with fixed parameters, Proceedings of the American Mathematical Society 146 (2018), 1083-1096.
53. [♦♣] H. Shu and X.-S. Wang, Global dynamics of a coupled epidemic model, Discrete and Continuous Dynamical Systems - Series B 22 (2017), 1575-1585.
54. [♠♣] 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.
55. [♦♣] 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.
56. [♠♥] X.-S. Wang, Asymptotic analysis of difference equations with quadratic coefficients, Methods and Applications of Analysis 23 (2016), 155-172.
57. [♠♥] X.-S. Wang and R. Wong, Asymptotics of Racah polynomials with varying parameters, Journal of Mathematical Analysis and Applications 436 (2016), 1149-1164.
58. [♠♥] 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.
59. [♦♣] 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.
60. [♦♣] 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.
61. [♦♣] 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.
62. [♠♦] 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.
63. [♠♥] 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.
64. [♠♣] X. Shi, X.-S. Wang, and N. Reid, Saddlepoint approximation of nonlinear moments, Statistica Sinica 24 (2014), 1597-1611.
65. [♠♥] X.-S. Wang, Plancherel-Rotach asymptotics of second-order difference equations with linear coefficients, Journal of Approximation Theory 188 (2014), 1-18.
66. [♠♦] X.-S. Wang, Asymptotics of delay differential equations via polynomials, Asymptotic Analysis 90 (2014), 83-103.
67. [♠♦] 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.
68. [♦♣] 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.
69. [♠♥] X.-S. Wang and R. Wong, Asymptotics of orthogonal polynomials via recurrence relations, Analysis and Applications 10 (2012), 215-235.
70. [♠♦♣] 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.
71. [♠♦♣] 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.
72. [♦♣] 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.
73. [♠♥] X.-S. Wang and R. Wong, Global asymptotics of the Meixner polynomials, Asymptotic Analysis 75 (2011), 211-231.
74. [♠♦♣] 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.
75. [♠♥] X.-S. Wang and R. Wong, Uniform asymptotics of some q-orthogonal polynomials, Journal of Mathematical Analysis and Applications 364 (2010), 79-87.
76. [♠♥] X.-S. Wang, Asymptotics of the q-theta function, Communications in Mathematical Analysis 7 (2009), 50-54.
77. [♠♥] X.-S. Wang and R. Wong, Discrete analogues of Laplace's approximation, Asymptotic Analysis 54 (2007), 165-180.

• January 4¨C7, 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 Vandemonde-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
• June 8-10, 2019, The Thirteenth International Conference on Recent Advances in Applied Dynamical Systems, Hangzhou Normal University
  Title: Optimal control of a PDE tumor 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: Aysmptotic 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 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

• January 4¨C7, 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 Spring 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 Diseases 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 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.

• March 6-7, 2026, Scientific Computation Around Louisiana, Louisiana State University