This research was funded by the National Natural Science Foundation of China (51574226) and 2017 Special Project of Subject Frontiers Scientific Research in China University of Mining and Technology (2017XKQY047).… Click to show full abstract
This research was funded by the National Natural Science Foundation of China (51574226) and 2017 Special Project of Subject Frontiers Scientific Research in China University of Mining and Technology (2017XKQY047). Additionally, authors are very thankful to the School of Mines, China University of Mining and Technology, Xuzhou, 221116 China, whose support allowed to accomplish this research within the specified time.
               
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