TY JOUR TI ROLE OF VISUALIZATION IN LEARNING MATHEMATICS STUDENTS IN HIGHER HEBNEH INSTITUTIONS OF POWER STRUCTURES OF THE RUSSIAN FEDERATION KW visualization KW computer technology KW graphical objects KW visual models KW professional competence KW mathematical competence JO Psychological and pedagogical problems of human and social security AU Efimova, A.B. AU Gorshkova, E.E. PY 2015 IS 2015 PB Saint-Petersburg University of State Fire Service of Emercom of Russia