Funding for this research was provided by:
National Science Foundation (No.31571942, No. 31771963, No.31601558)
Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Program of Introducing Talents of Discipline to Universities ((No. 111-2-06))
Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18_1790)
Fundamental Research Funds for the Central Universities (JUSRP51306A, JUSRP51402A & JUDCF13008)
Text and Data Mining valid from 2018-12-07
Received: 6 July 2018
Revised: 15 October 2018
Accepted: 11 November 2018
First Online: 7 December 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.