ACKNOWLEDGEMENT

摘要

In 2013,it gives us great pleasure to say how much we have appreciated working with you over the past twelve months.The papers of Transactions of Nanjing University of Aeronautics and Astronautics(TNUAA)have been indexed by Ei Compendex(USA),SA(England),andРЖ(Russia),etc.databases.We would like to express our sincere grati-