Aims and Scope The Journal of Computational Mathematics is published bi-monthly. It is an international journal covering all branches of modern computational mathematics such as numerical linear algebra, numerical optimization, computational geometry, numerical PDEs and inverse problems. Papers containing new ideas, creative approaches and/or innovative applications as well as invited reviews are expected to appear regularly in the journal. Instructions for Authors To speed up the refereeing and publication processes, all transactions and communications between the journal and the authors will be done electronically. * All manuscripts should be in the form PDF or postscript or MS Word files. * Papers can be submitted directly to the Editorial office at  jcm@icmsec.cc.ac.cn. * Authors can also submit papers directly to one of the editorial members. * Online submission is also available, see http://www.global-sci.org/jcm/submit.html TeX File Preparation The template file will assist you in preparing the LaTeX version of your final document. Contact the journal's office at the email address above if you have any questions. The instructions and sample files can be found in http://www.global-sci.org/jcm/TeX.html Submission Policy and Copyright Submission of a manuscript implies that the paper is original and has not been submitted elsewhere. All authors will be required to sign a copyright transfer agreement in order for the article to be published. The signed Transfer of Copyright empowers the Publisher on behalf of the Author(s) to protect the Work and its image against any unauthorized use, and to properly authorize dissemination of the work. The Editors will supply the necessary forms for this transfer. Authors are responsible for obtaining permissions to reprint previously published figures, tables, and other material. Subscription Information ISSN Print: 0254-9409 Electronic: 1991-7139 Issues: 6/year For information on subscription rates please visit http://www.global-sci.org/jcm/subscription Production Printed in the People's Republic of China. JCM is sponsored by the Institute of Computational Mathematics of the Chinese Academy of Sciences.