presentation

• Eighth International Conference on Scientific Computing and Applications. University of Nevada at Las Vegas, Nevada, April 1 - 4, 2012.
• Frontiers of Computational and Applied Mathematics. Oct 21 - Oct 25, 2011.
• Department of Mathematics, Hong Kong Baptist University. Aug 30, 2011.
• School of Mathematical Science. Peking University. Beijing. CHINA. Aug 15 - 20, 2011.
• Summer School on Multilevel Adaptive Finite Element Methods, Beijing University, CHINA, Aug 10-12, 2010.
• Workshop on Algebraic Multigrid Methods. Kunming, China, Aug 1-10, 2011
• 2011 Sun Yat-sen University International Conference on Frontiers of Numerical PDEs. Guangzhou, CHINA. Aug 1-4. 2011.
• AMS Western Section in Las Vegas. University of Nevada at Las Vegas. Apr 30, 2011.
• Department of Applied Mathematics. Illinois Institute of Technology Chicago, 25 Apr, 2011.
• Invite Speakers of 20-th International Conference on Domain Decomposition Methods. UC San Diego, 7-11 Feb, 2011.
• Changjiang International Conference on Mathematics. Sichuan. CHINA, Aug 9, 2010.
• Summer School on Multilevel Adaptive Finite Element Methods, Beijing, CHINA, July 26-Aug 6, 2010.
• School of Mathematical Sciences. Sichuan University. CHINA, July 6,2010.
• Middle West Numerical Analysis Day, Iowa State University, April 25, 2010
• Scientific Computing Seminars, Department of Mathematics. University of Houston, April 8, 2010.
• Adaptive and Multilevel Methods for Partial Differential Equations 13-14 November 2009, UC San Diego in La Jolla, California.
• 19-th International Conference on Domain Decomposition Methods, Zhangjiajie, CHINA, August 18, 2009.
• International Conference on Applied Analysis and Scientific Computation, Shanghai Normal University, CHINA, June 26, 2009.
• Nanjing University, CHINA, June 23, 2009.
• Chinese Academy of Sciences, CHINA, June 9, 2009.
• 14-th Copper Mountain Conference on Multigrid Methods, March 25, 2009.
• Mathematical Sciences Seminars, University of Nevada at Las Vegas, March 11, 2009.
• SIAM Conference on Computational Science and Engineering (CSE09), Miami, March 4, 2009.
• Computational and Applied Mathematics Seminar, Purdue University, November 21, 2008
• Department of Mathematics Colloquium, Wayne State University, November 3, 2008
• Finite Element Circus, Rensselaer Polytechnic Institute, October 25, 2008,
• Chinese Academy of Sciences, CHINA, July 7, 2008.
• Summer School on AFEM and Multigrid, Beijing, CHINA, July 7--11, 2008.
• Foundation of Computational Mathematics, Hong Kong, CHINA, June 20, 2008.
• Mathematical Sciences Seminars and Colloquium, University of Nevada at Las Vegas, May 6, 2008.
• Applied Math Seminar, University of California, Irvine, April 21, 2008.
• Xiangtan University, CHINA, March 25, 2008.
• Graduate Seminar, University of California, Irvine, November 16, 2007.
• 10th SIAM conference on Geometric Design and Computing, San Antonio, Texas, November 4, 2007.
• Mathematical and Computational Sciences Division Seminar Series, National Institute of Standards and Technology (NIST), June 5, 2007.
• NSF-CBMS Regional Research Conference, University of Iowa, May 23, 2007.
• Finite Element Circus, University of Maryland, April 21, 2007.
• Numerical Analysis Seminar, University of Maryland, January 30, 2007.
• University of California, Irvine (Special Recruitment Colloquium), January 19, 2007.
• Finite Element Circus, The Pennsylvania State University, November 4, 2006.
• Academy of Mathematics and System Sciences, Chinese Academy of Sciences. July 21, 2006.
• 2006 Summer School on the Multiscale Adaptive Method, Beijing University, July 17-21, 2006.
• Numerical Analysis Seminar, UCSD, May 23, 2006.
• Tech Report, National Biomedical Computation Resource, UCSD, Apr. 27, 2006
• Numerical Analysis Seminar, UCSD, Oct. 11, 2005.
• 8th US National Congress on Computational Mechanics Austin, Texas, July 24-28, 2005
• Midwest Numerical Analysis Conference, May 22, 2005
• University of California, San Diego (Special Recruitment Colloquium), Jan 6, 2005
• University of Delaware, Dec 13, 2004
• Wayne State University, Dec 8, 2004
• University of Maryland, Nov 30, 2004
• Finite Element Circus. Syracuse University, Oct 15, 2004
• CAM Luncheon Seminar in Penn State, Sep 24, 2004
• 13th International Meshing Roundtable. Williamsburg, VA. Sep. 20 2004 - Peking University, China, June 21, 2004
• Superconvergence and A Posteriori Error Estimates, Changsha, China, May 31-Jun 2, 2004
• Recent Advances in Adaptive Computation, Hangzhou, China, May 24-28, 2004
• Finite Element Circus, University of Pittsburgh, April 17 2004
• Finite Element Circus. Cornell University, Nov 8, 2003
• CAM Luncheon Seminar in Penn State, Nov 14, 2003

Other Activities

• IMA workshop on Numerical Solutions of Partial Differential Equations: Fast Solution Techniques. November 29 - December 3, 2010
• IMA-PI Workshop on Numerical Simulation of Complex Fluids and MHD at Penn State, March 1-3, 2010
• Visit Prof R.H. Nochetto at University of Maryland, March 21-26, 2010
• Organize the workshop on multilevel and adaptive methods at Peking University, Beijing, Aug 28-30, 2009