This work is partially supported by the Hunan Natural Science Fund Youth Fund Project (No. 2018JJ3419), the Scientific Research Foundation of Hunan Provincial Education Department (Nos. 17C1362, 17C1364) and supported by the Doctoral Funds of USC (Nos. 2016XQD40, 2016XQD42). ☆ This work is partially supported by the Hunan Natural Science Fund Youth Fund Project (No. 2018JJ3419), the Scientific Research Foundation of Hunan Provincial Education Department (Nos. 17C1362, 17C1364) and supported by the Doctoral Funds of USC (Nos. 2016XQD40, 2016XQD42).