1. LSEC, Institute of Computational Mathematics and Scientific/Engineering Computing, NCMIS, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
2. School of Mathematics, University of Minnesota, Minneapolis, MN 55455, USA
3. Center of Soft Matter Physics and its Applications, Beihang University, 37 Xueyuan Road, Beijing 100191, People’s Republic of China
4. Faculty of Mathematics, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Santiago, Chile