Affiliation: | 1. Department of Mathematics and Computer Science, School of Arts and Sciences, York College, The City University of New York (CUNY), 9420 Guy R. Brewer Blvd., Jamaica, NY 11451, USA;2. Department of Computer Science, The Graduate Center of CUNY, 365 Fifth Ave., New York, NY 10016, USA;3. School of Computer Science, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China;4. School of Automation, Huazhong University of Science and Technology (HUST), Wuhan 430074, China |