Acta Mathematicae Applicatae Sinica (English Series) is a quarterly journal established and edited by the Chinese Mathematical Society & Academy of Mathematics and Systems Science, Chinese Academy of Sciences, and published by Springer-Verlag Co., Germany. AMAS is a comprehensive international mathematical journal carrying high quality original research papers on all branches of applied mathematics and its related fields from all over the world. It aims at presenting latest achievements in mathematical research and promoting international academic exchanges.