## Changhui Tan

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

Website URL: http://www.changhuitan.com

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.

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Monday, 13 May 2019 14:36

### A sharp critical threshold for a traffic flow model with look-ahead dynamics

- This is a joint work with
*Yongki Lee*. - The preprint is available on arXiv:1905.05090.

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Thursday, 10 January 2019 14:36

### On the Euler-Alignment system with weakly singular communication weights

- The preprint is available on arXiv:1901.02582.

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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 |

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Saturday, 30 August 2008 22:11

### Conference, Workshops and Seminars

## 2019

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. |

## 2018

## 2017

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Wednesday, 30 August 2017 21:56

### Singularity formation for a fluid mechanics model with nonlocal velocity

- The preprint is available on arXiv:1708.09360.

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Monday, 24 July 2017 22:04

### Global regularity for 1D Eulerian dynamics with singular interaction forces

- This is a joint work with
*Alexander Kiselev*. - The paper has been published in
*SIAM Journal on Mathematical Analysis*doi:10.1137/17M1141515.

- The preprint is available on arXiv:1707.07296.

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Friday, 30 June 2017 19:32

### An asymptotic preserving scheme for kinetic models with singular limit

- This is a joint work with
*Alina Chertock*and*Bokai Yan*. - The paper has been published in
*Kinetic and Related Models*doi:10.3934/krm.2018030.

- The preprint is available on arXiv:1706.09568.

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Wednesday, 18 January 2017 22:08

### Global regularity for the fractional Euler alignment system

- This is a joint work with
*Tam Do*,*Alexander Kiselev*and*Lenya Ryzhik*. - The paper has been published in
*Archive for Rational Mechanics and Analysis*doi:10.1007/s00205-017-1184-2.

- The preprint is available on arXiv:1701.05155.

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Wednesday, 05 October 2016 17:24

### Linearly independency for exponential functions

This is a supplementary notes for MATH211 ODE and Linear Algebra.

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