The authors would like to thank the referee for valuable comments for the improvement of the presentation. The research of the first author was supported by Application-Oriented Characterized Disciplines, China, Double First-Class University Project of Hunan Province, China (Xiangjiaotong [2018]469), the Science and Technology Plan Project of Hunan Province, China (No. 2016TP1020), the Open Fund Project of Hunan Provincial Key Laboratory of Intelligent Information Processing and Application for Hengyang Normal University, China (No. IIPA18K06) and the Hengyang City Science and Technology Project (No. 2018 kJ125). The work of the second author is supported by Mathematical Research Impact Centric Support (MATRICS) of the Department of Science and Technology (DST), India (MTR/2017/000367).
The authors would like to thank the referee for valuable comments for the improvement of the presentation. The research of the first author was supported by Application-Oriented Characterized Disciplines, China , Double First-Class University Project of Hunan Province, China (Xiangjiaotong [2018]469 ), the Science and Technology Plan Project of Hunan Province, China (No. 2016TP1020 ), the Open Fund Project of Hunan Provincial Key Laboratory of Intelligent Information Processing and Application for Hengyang Normal University, China (No. IIPA18K06 ) and the Hengyang City Science and Technology Project (No. 2018kJ125 ). The work of the second author is supported by Mathematical Research Impact Centric Support (MATRICS) of the Department of Science and Technology (DST), India ( MTR/2017/000367 ).
