1. Federal University of Rio Grande do Norte DCA/UFRN,Department of Computer Engineering and Automation,Natal,RN,Brazil
2. Federal Rural University of Semi-arid DCT/UFERSA,Department of Science and Technology,Caraúbas,RN,Brazil
3. Federal Institute of Education, Science and Technology of Bahia IFBA,Salvador,Brazil
4. Federal Rural University of Semiarid DCME/UFERSA,Department of Natural Sciences, Mathematics, and Statistics,Mossoró,RN,Brazil