Published Monday, November 18, 2013 at 765 × 1024 in Visiting Associate Professor Li-Tang Yan (燕立唐) at Tsinghua University in China ‹ Return to post Leave a Comment Cancel reply Enter your comment here... Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account. ( Log Out / Change ) You are commenting using your Twitter account. ( Log Out / Change ) You are commenting using your Facebook account. ( Log Out / Change ) Cancel Connecting to %s Notify me of new comments via email. Notify me of new posts via email. Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.