Universitatea "Aurel Vlaicu" din Arad Ministerul Educatiei si Cercetarii Romania Under auspices of Romanian Academy"Information Sciences and Technology " Section The General Association of Engineers in Romania (A.G.I.R.), Arad branch Fujian University of Technology Shandong University of Science and Technology National Demonstration Center for Experimental Electronic Information and Electrical Technology Education Fujian Provincial Key Laboratory of Big Data Mining and Applications Xi'an University of Posts & Telecommunications