TY JOUR TI FUZZY INFERENCE SYSTEM OF CURRENT ECONOMIC EFFICIENCY EVALUATION OF COMMUNICATION PROVIDER NETWORK ELEMENTS OPERATION KW communication provider network elements KW project economic efficiency KW fuzzy inference system JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Sorokin, A.. AU Chertina, E.. PY 2018 IS 2018 PB Astrakhan State Technical University