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- SIAM Central States Section. University of Arkansas at Little Rock, Little Rock, Arkansas. Sep 30, 2016.
- 9-th National Conference on Finite Element Methods. Xinan Jiaotong University, Emei, Sichuan. Aug 20, 2016.
- Shanghai Jiao Tong University, Shanghai, CHINA. Aug 10-11, 2016.
- Workshop on Numerical Methods for PDE at Peking University, Beijing, CHINA. July 20, 2016.
- Chinese Academy of Sciences, Beijing, CHINA. July 5, 2016.
- MAFELAP, Brunel University London, June 14-17, 2016.
- SoCAMS. Claremont Colleges. June 4, 2016.
- Tufts University. Boston. Feb 13 - 16. 2016.
- University of California at Riverside. Riverside. Feb 3, 2016.
- Chinese Academy of Sciences, Beijing, Jan 4, 2016.
- Shandong University. Jinan. Dec 28 - 30. 2015.
- Sichuan University. Chengdu. Dec 18. 2015.
- Jilin University. Jilin. Dec 7 - 9, 2015.
- Shanghai Jiaotong University. Shanghai. Dec 3-5, 2015.
- Wenzhou University. Wenzhou. Nov 16 - 18, 2015.
- Xiamen University. Xiamen. Nov 6-9, 2015.
- Numerical Methods on Polygon Meshes. Altanata. Oct 26-28, 2015.
- School of Mathematics and Computational Science, Changsha University of Science and Technology. Oct 13, 2015.
- School of Mathematics, Xiangtan University, Oct 11, 2015.
- School of Mathematics, South China Normal University Guangzhou, CHINA. Sep 11, 2015.
- The 8th International Congress on Industrial and Applied Mathematics (ICIAM). Beijing, CHINA, August 10 - 14, 2015.
- School of Mathematical Sciences. Sichuan University. CHINA, July 20, 2015.
- SIAM Conference on Computational Science. Salt Lake City, Utah. March 14 - 15, 2015.
- Numerical Analysis Seminar. Texas A&M. Feb 25, 2015.
- Finite Element Circus. Minnesota. October 24-25, 2014.
- IMA Special workshop. Minnesota. October 22-24, 2014.
- School of Mathematics and Statistics, Beijing Institute of Technology, CHINA, July 10, 2014.
- Beijing Computational Science Research Center, CHINA, July 8, 2014.
- Chinese Academy of Sciences, CHINA, July 8, 2014.
- School of Mathematics, Sichuan University, Chengdu, Sichuan CHINA. July 2, 2014.
- School of Mathematics and Statistics, Wu Han University, CHINA, June 27, 2014.
- Beijing International Center for Mathematical Research (BICMR), CHINA, June 26, 2014.
- ICERM Workshop. Brown University. May 12-16, 2014.
- Oberwolfach Workshop. Oberwolfach, Germany. Nov 17-22, 2013.
- Colloquium. Department of Mathematics and Statistics. Portland State University. Portland, Oregon. Oct 4. 2013.
- School of Mathematics, Sun Yat-sen University International Conference on Frontiers of Numerical PDEs. Guangzhou, CHINA. Aug 2. 2013.
- School of Mathematics, Sichuan University, Chengdu, Sichuan CHINA. July 25, 2013.
- Workshop on Scientific Computing With Applications Kunming, CHINA. July 18, 2013.
- School of Mathematics, South China Normal University Guangzhou, CHINA. July 12, 2013.
- SIAM Annual Meeting San Diego, CA. July 10, 2013.
- Workshop on Multilevel computational methods and optimization Weizmann Institute of Science, Israel Apr 30-May 2, 2013.
- Numerical Approximation of Partial Differential Equations. In Occasion of Ricardo H. Nochetto's 60th Birthday. Gargnano del Garda, Brescia, Italy. Mar 21, 2013.
- AMS Joint Mathematics Meetings. San Diego, Jan 11, 2013.
- Numerical Analysis Seminar, University of Maryland at College Park. Dec 11, 2012.
- Department of Mathematics and Statistics. Missouri University of Science and Technology. Oct 12, 2012.
- Workshop on Efficient Numerical Methods for Partial Differential Equations. Urumqi, China. August 13-18, 2012.
- 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

- Advances in Mathematics of Finite Elements. Austin, TX, March 21-22, 2016.
- 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