Funding for this research was provided by:
National Natural Science Foundation of China (61502254)
Program for Yong Talents of Science and Technol- ogy in Universities of Inner Mongolia Autonomous Region (NJYT-18-B10)
Open Funds of Key Labora- tory of Symbolic Computation and Knowledge Engineering of Ministry of Education (93K172018K07)
Text and Data Mining valid from 2018-10-30
First Online: 30 October 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.