| 基金项目： | The guest editors would like to thank the authors of all submitted papers for considering this special issue to disseminate their work and all the reviewers for their conscientious work. Our special thanks also go to Dr. Qingchun CHEN for his excellent assistance in making this special issue possible. This work was partially supported by the Major State Basic Research Development Program of China （973 Program No. 2012CB316100）, the National Natural Science Foundation of China （NSFC No. 61032002）, and the Innovative Intelligence Base Project （111 Project No. 111-2-14）. |
