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Changhui Tan

Changhui Tan

I am a postdoctoral research associate in CSCAMM and Department of Mathematics, University of Maryland. 

 

 

 Speaker: Xiangcheng Zheng (University of South Carolina)

We proved the wellposedness of variable-order mobile-immobile time-fractional diffusion equations and the regularity of their solutions. Optimal-order finite element approximation was presented and analyzed. Numerical experiments were carried out for demonstration.
 

Time: January 31, 2020 2:30pm-3:30pm
Location: LC317R

Speaker: Xiaolin Li (Stony Brook University)

In this talk, I will review the history of the Lagrangian front tracking method and the computational platform built on this methodology. I will review the front tracking in the study of fluid interface instabilities, including Rayleigh-Taylor instability, Richtmyer Meshkov instability and fluid mixing induced by these instabilities. I will also introduce a fully conservative front tracking scheme and its application in the phase transition problem.
 

Time: March 20, 2020 2:30pm-3:30pm
Location: LC317R
Host: Xinfeng Liu

 Speaker: Yuanwei Qi (University of Central Florida)

In this talk, I shall report some recent progress on the existence and multiplicity of traveling waves to one of the most important models in Turing Pattern Formation. In addition, I shall pose some questions which are wide open which demand new ideas and fresh approaches. This is a joint-work with Xinfu Chen et al.
 

Time: January 17, 2020 2:30pm-3:30pm
Location: LC317R
Host: Changhui Tan

Tuesday, 03 December 2019 17:28

ACM Seminar Schedule

Regular seminar talk time and location: Fridays 2:30pm-3:30pm @ LC 317 R. Due to the pandemic, talks will be delivered virtually.

Fall 2020

September 25 Trevor Leslie (University of Wisconsin, Madison) Host: Changhui Tan
  Title: Geometric Structure of Mass Concentration Sets for Pressureless Euler Alignment Systems 
October 2 Rihui Lan (University of South Carolina) Math Postdoc
  Title: The Monolithic Arbitrary Lagrangian-Eulerian (ALE) Finite Element Analysis of Moving Interface Problems 
October 9 Jiguang Sun (Michigan Technological University) Host: Qi Wang
  Title: A New Finite Element Approach for Nonlinear Eigenvalue Problems 
October 16 Barak Sober (Duke University) Host: Wolfgang Dahmen
  Title: Approximating the Riemannian Metric from Discrete Samples 
October 23 Li Wang (University of Minnesota) Host: Changhui Tan
  Title: A Proximal-gradient Algorithm for Crystal Surface Evolution 
October 30 Xiang Xu (Old Dominion University) Host: Changhui Tan
3:30pm-4:30pm  Title: Some Analytic Properties of a Singular Potential in the Laudau-de Gennes Theory for Liquid Crystals
November 13 Dallas Albritton (New York University) Host: Changhui Tan
  Title: TBA

Spring 2020

January 17 Yuanwei Qi (University of Central Florida) Host: Changhui Tan
  Title: Traveling Wave of Gray-Scott System: Results and Perspective
January 31 Xiangcheng Zheng (University of South Carolina) Math Graduate Student
  Title: Mathematical and numerical analysis to variable-order mobile-immobile time-fractional diffusion equations
February 21 Hailiang Liu (Iowa State University) Host: Changhui Tan
  Title: Efficient, positive, and energy stable schemes for Poisson-Nernst-Planck systems
March 20 Xiaolin Li (Stony Brook University) Host: Xinfeng Liu
 (Postponed) Title: Lagrangian Front Tracking and Applications to Conservation Law, Fluid Mixing, and Phase Transition Problems
March 27 Rihui Lan (University of Nevada, Las Vegas) Host: Lili Ju
 (Postponed) Title: The Monolithic Arbitrary Lagrangian-Eulerian (ALE) Finite Element Analysis of Moving Interface Problems

2019 and before

The schedule can be found HERE and HERE.

Monday, 23 September 2019 09:01

MacOS change keychain password

In the MacOS system, the keychain password has to match the user password in order to use keychain appropriately. In my case, they have to match in order to allow Apple Watch to unlock the Mac.

The official way to change the keychain password can be found HERE. However, in my case, the "Change password for keychain login" option is in gray and can not be selected. One solution is the following:

Open terminal and type in

security set-keychain-password

Then, type in old password and then new password. The password is then changed. This does not require admin access.

Saturday, 30 August 2008 23:26

Honors and Awards

2013-2014 Ann G. Wylie Dissertation Fellowship
  SIAM Student Travel Award
  AMS Graduate Student Travel Grant
  Kaplan Travel Grant
2011-2012 Mark E. Lachtman Graduate Student Award
  Jacob K. Goldhaber Travel Award
2010-2011 Kaplan Travel Grant
2008-2010 Graduate Fellowship in University of Maryland
2007-2008 First Honor Graduates in Beijing
  "Outstanding University Graduates" in Peking University
2006-2007 Triple-Good Student in Peking University
  Chinese Economical Research Scholarship
2005-2006 Triple-Good Student in Peking University
  Baogang Scholarship
2004-2005 Triple-Good Student in Peking University
  Guanghua Scholarship
Saturday, 30 August 2008 22:11

Conference, Workshops and Seminars

 

2020

2020.11.19 PDE Seminar, Shanghai Jiao Tong University.
  Talk: TBA.
2020.9.28 Mathematics Colloquium, Old Dominion University.
  Talk: Self-organized dynamics: aggregation and flocking.
2020.9.28 CAM Seminar, Iowa State University.
  Talk: Nonlocal traffic flow models.

2019

2019.12.26 PDE Seminar, Beijing Normal University.
  Talk: Eulerian dynamics in multi-dimensions with radial symmetry.
2019.12.16-20 Emergent Phenomena – From Kinetic Models to Social Hydrodynamics, National University of Singapore.
  Talk: Eulerian dynamics in multi-dimensions with radial symmetry.
2019.12.11-14 SIAM Conference on Analysis of Partial Differential Equations: Mini-symposium on Nonlocal PDEs in Fluid Dynamics.[Co-organizer]
  Talk: Eulerian dynamics in multi-dimensions with radial symmetry.
2019.11.22 Analysis Seminar, University of South Carolina.
  Talk: Nonlocal traffic flow models.
2019.11.2-3 AMS Sectional Meeting: Special session on Nonlinear PDEs in Fluid Dynamics, University of Florida.
  Talk: On the Burgers equation with density dependent fractional dissipation.
2019.10.21-25 Young Researchers Workshop: Ki-Net 2012-2019, University of Maryland, College Park.
  Talk: Eulerian dynamics in multi-dimensions with radial symmetry.
2019.9.20-22 SIAM SEAS 2019 Annual Meeting: Mini-symposium on Recent Developments in Nonlocal PDEs in Fluids and Other Applications, University of Tennessee, Knoxville.[Organizer]
2019.9.20-22 SIAM SEAS 2019 Annual Meeting: Mini-symposium on Innovations and Implementations of Numerical Methods for Time Dependent Problems, University of Tennessee, Knoxville.
  Talk: Asymptotic preserving schemes on kinetic models with singular limits.
2019.8.19-23 Recent Advances in Nonlocal Kinetic, Fluid and Diffusive PDEs, Jeju, South Korea.
  Talk: Eulerian dynamics with alignment interactions.
2019.8.13 Analysis Seminar, Korea Institute for Advanced Study, Seoul, South Korea.
  Talk: Small scale singularity formations in Euler and related equations.
2019.7.15-19 International Congress on Industrial and Applied Mathematics, Valencia, Spain.
  Talk: Eulerian dynamics with alignment interactions.
2019.7.8-10 2019 TIANFU International Conference on Partial Differential Equations, Southwestern University of Finance and Economics, Chengdu, China.
  Talk: Eulerian dynamics with alignment interactions.
2019.6.20 PDE Seminar, University of Electronic Science and Technology of China, Chengdu, China.
  Talk: Small scale singularity formations in Euler and related equations.
2019.6.12 PDE Seminar, Chongqing University, Chongqing, China.
  Talk: Small scale singularity formations in Euler and related equations.
2019.5.24 Colloquium, Renmin University, Beijing, China.
  Talk: Small scale singularity formations in Euler and related equations.
2019.5.23 Computational and Applied Math Seminar, Peking University, Beijing, China.
  Talk: Asymptotic preserving schemes on kinetic models with singular limits.
2019.5.22 Thematic Reports, Beijing Normal University, Beijing, China.
  Talk: Eulerian dynamics with nonlocal interactions.
2019.5.15 Analysis Seminar, Tsinghua University, Beijing, China.
  Talk: Self-organized dynamics: aggregation and flocking.
2019.5.9-12 Partial Differential Equations and Applications in Physics and Life Sciences, Chongqing, China.
  Talk: Eulerian dynamics with alignment interactions.
2019.3.17-20 DASIV Center Spring School Series: Models and Data.
  Talk: Asymptotic preserving schemes on kinetic models with singular limits.
2019.3.12 PDE Seminar, Georgia Institute of Technology.
  Talk: Eulerian dynamics with alignment interactions.
2019.3.5-6 Mathematical Aspects of Collective Dynamics: Kinetic Description and Fractional Diffusion, University of Maryland, College Park.
  Talk: On Euler Alignment system with weakly singular interactions.
2019.3.1 Graduate Seminar, Department of Civil Engineering, University of South Carolina.
  Talk: The mathematics in continuum mechanics.
2019.2.19 Graduate Colloquium, University of South Carolina.
  Talk: Fluid dynamics: from stirring a cup of coffee to tracking a hurricane.
2019.2.1 Analysis Seminar, University of South Carolina.
  Talk: The incompressible Euler equation.

2018

2018.10.22-26 Young Researchers Workshop: Kinetic Descriptions in Theory and Applications, University of Maryland, College Park.
  Talk: On the Euler-Alignment system.
2018.10.5-7 The 1st Annual Meeting of SIAM Texas-Louisiana Section, Louisiana State University.
  Talk: Global regularity for Burgers equation with density dependent fractional dissipation.
2018.9.29-30 AMS Sectional Meeting: Special Session on Recent Analytic and Numeric Results on Nonlinear Evolution Equations, University of Delaware.
  Talk: Global regularity for Burgers equation with density dependent fractional dissipation.
2018.6.18-22 Nonlocal Differential Equations in Collective Behavior, American Institute of Mathematics, San Jose.
2018.4.23 Computational and Applied Mathematics Seminar, Iowa State University.
  Talk: Self-organized dynamics: aggregation and flocking.
2018.4.21-22 Research Interaction Weekend: Critical Thresholds in Kinetic and Wave Equations, Iowa State University.
  Talk: Recent progress in critical thresholds phenomenon.
2018.3.1 Mathematics Colloquium, University of Akron.
  Talk: Self-organized dynamics: aggregation and flocking.
2018.2.26 Mathematics Colloquium, University of Central Florida.
  Talk: Self-organized dynamics: aggregation and flocking.
2018.2.19-22 Young Researchers Workshop: Kinetic Models in Biology and Social Sciences, Arizona State University.
  Talk: Asymptotic preserving schemes on kinetic models with singular limits.
2018.2.8 Mathematics Colloquium, University of South Carolina.
  Talk: Self-organized dynamics: aggregation and flocking.
2018.1.10-13 Joint Mathematics Meeting: AMS Special Session on Analysis of Nonlinear Partial Differential Equations and Applications, San Diego.
  Talk: Global regularity for Burgers equation with density dependent fractional dissipation.
2018.1.4 Mathematics Colloquium, Baylor University.
  Talk: Self-organized dynamics: aggregation and flocking.

2017

2017.12.9-12 SIAM Conference on Analysis of Partial Differential Equations, Baltimore.
  Talk: Global regularity for Burgers equation with density dependent fractional dissipation.
2017.11.30 Hyperbolic and Mixed Type PDEs Seminar, Pennsylvania State University.
  Talk: Self-organized dynamics: aggregation and flocking.
2017.11.4-5 AMS Sectional Meeting: Special session on Conservation Laws, Nonlinear Waves and Applications, University of California, Riverside.
  Talk: Global regularity for Burgers equation with density dependent fractional dissipation.
2017.11.4-5 AMS Sectional Meeting: Special session on Mathematical Fluid Mechanics, Nonlinear Waves and Applications, University of California, Riverside.
  Talk: Regularity and singularity formations for fractional porous medium flow.
2017.11.3 Special Analysis Seminar, University of Southern California.
  Talk: Self-organized dynamics: aggregation and flocking.
2017.10.26 Differential Equations Seminar, North Carolina State University.
  Talk: Self-organized dynamics: aggregation and flocking.
2017.10.25 Applied Mathematics and Analysis Seminar, Duke University.
  Talk: Self-organized dynamics: aggregation and flocking.
2017.10.20 Applied and Computational Mathematics Seminar, Tulane University.
  Talk: Self-organized dynamics: aggregation and flocking.
2017.10.9-13 Young Researchers Workshop: Current trends in kinetic theory, University of Maryland, College Park.
  Talk: Kinetic swarming models and hydrodynamic limits.
2017.9.9-10 AMS Sectional Meeting: Special session on Nonlocal PDEs in Fluid Dynamics, University of North Texas, Denton. [Co-organizer]
2017.9.9-10 AMS Sectional Meeting: Special session on Recent Progress on Hyperbolic Conservation Laws, University of North Texas, Denton.
  Talk: Global regularity for compressible Euler equations with alignment.
2017.7.10-14 SIAM Annual Meeting, Special Session on Recent Development on Fractional Diffusion Equation: Analysis and Computation, Pittsburgh.
  Talk: Global regularity for the fractional Euler alignment system.
2017.6.5-9 Summer School and Workshop: Mathematical Analysis of Water Waves and Related Models, Bodega Marine Laboratory, Bodega Bay.
2017.4.22-23 AMS Sectional Meeting: Special session on Analysis on the Navier-Stokes Equations and Related PDEs, Washington State University, Pullman.
  Talk: Global regularity for the fractional Euler alignment system.
2017.4.14 Partial Differential Equations Seminar, University of Houston.
  Talk: Self-organized dynamics: aggregation and flocking.
2017.3.23-25 Kinetic Descriptions of Chemical and Biological Systems: Models, Analysis and Numerics, Iowa State University, Ames.
  Talk: Global regularity for the fractional Euler alignment system.
2017.3.4-5 Texas Differential Equations Conference, Texas A&M University, College Station.
  Talk: Global regularity for Burgers equation with density dependent fractional dissipation.
2017.2.13-17 Dynamics of Small Scales in Fluids, Brown University, Providence.
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