Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY, USA. xiaowu1@ic.sunysb.edu|Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY, USA. xiaowu1@ic.sunysb.edu|Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY, USA. xiaowu1@ic.sunysb.edu|Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY, USA. xiaowu1@ic.sunysb.edu|Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY, USA. xiaowu1@ic.sunysb.edu|Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY, USA. xiaowu1@ic.sunysb.edu