1. School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, P. R. China
2. Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, P. R. China
3. Lab Analyst of Network Information Center, Dalian Polytechnic University, Dalian 116034, P. R. China