TY JOUR TI CLUSTER ANALYSIS USE ORTYPICAL OBJECTS SELECTION FOR EMERCOM OF RUSSIA TRAINING CAMP KW cluster analysis KW characteristic of object KW segmentation data KW social research KW application for statistics JO Problems of risk management in the technosphere AU Minkin, D.Y. AU Terehin, S.N. AU Usherov, K.S. PY 2014 IS 2014 PB Saint-Petersburg University of State Fire Service of Emercom of Russia