Peng J. 1 a Zhang Y. 1 b Aff1 grid.440669.9 0000 0001 0703 2206 School of Mathematics and Statistics, Changsha University of Science and Technology Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering 410114 Changsha China a junyaopeng906@163.com b zhangyongzju@163.com 10 10 2019 12 2019 159 2 689 689 2 10 2019 25 4 2019 26 4 2019 10 10 2019 © Akadémiai Kiadó, Budapest, Hungary 2019 2019 publisher-imprint-name Akadémiai Kiadó, co-published with Springer volume-issue-count 2 issue-article-count 21 issue-toc-levels 0 issue-pricelist-year 2019 issue-copyright-holder Akadémiai Kiadó, Budapest, Hungary issue-copyright-year 2019 article-contains-esm No article-numbering-style ContentOnly article-registration-date-year 2019 article-registration-date-month 10 article-registration-date-day 2 article-toc-levels 0 toc-levels 0 volume-type Regular journal-product NonStandardArchiveJournal numbering-style ContentOnly article-grants-type Regular metadata-grant OpenAccess abstract-grant OpenAccess bodypdf-grant OpenAccess bodyhtml-grant OpenAccess bibliography-grant OpenAccess esm-grant OpenAccess online-first false pdf-file-reference BodyRef/PDF/10474_2019_Article_1000.pdf target-type OnlinePDF issue-online-date-year 2019 issue-online-date-month 10 issue-online-date-day 23 issue-print-date-year 2019 issue-print-date-month 10 issue-print-date-day 23 issue-type Regular article-type OriginalPaper journal-subject-primary Mathematics journal-subject-secondary Mathematics, general journal-subject-collection Mathematics and Statistics open-access false This research was supported by the National Natural Science Foundation of China (Grant No. 11501052). The online version of the original article can be found under DOI:10.1007/s10474-018-00907-0.
