College of Mathematics and Computer Sciences, Fuzhou University, Fuzhou 350116, China2. Key Laboratory of Network Computing and Intelligent Information Processing, Fuzhou University, Fuzhou 350116, China3. Key Laboratory of Ministry of Education for Spatial Data Mining & Information Sharing, Fuzhou University, Fuzhou 350116, China;
College of Mathematics and Computer Sciences, Fuzhou University, Fuzhou 350116, China2. Key Laboratory of Network Computing and Intelligent Information Processing, Fuzhou University, Fuzhou 350116, China3. Key Laboratory of Ministry of Education for Spatial Data Mining & Information Sharing, Fuzhou University, Fuzhou 350116, China;
College of Mathematics and Computer Sciences, Fuzhou University, Fuzhou 350116, China2. Key Laboratory of Network Computing and Intelligent Information Processing, Fuzhou University, Fuzhou 350116, China3. Key Laboratory of Ministry of Education for Spatial Data Mining & Information Sharing, Fuzhou University, Fuzhou 350116, China;