Funding for this research was provided by:
Anhui Agricultural University College Students Innovation and Entrepreneurship Training Program Innovative Training Project Foundation (201710364017, 201710364061)
Text and Data Mining valid from 2018-08-11
Received: 15 June 2018
Accepted: 1 August 2018
First Online: 11 August 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.