id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
issue-245	Fadyeyeva, Iryna; Gryniuk, Oksana	FUZZY MODELLING IN RISK ASSESSMENT OF OIL AND GAS PRODUCTION ENTERPRISES’ ACTIVITY	2018	9	.pdf	application/pdf	5591	228	59	IF x is A and x is A and and x is A THENk k k n n k( ) …: � � � � � � � � � � � �1 1 2 2 y is B and y is B and and y is Bk k m m k 1 1 2 2� � � � � � � � � �� ⊃ , where R k Nk( ) = …( )� � � �1 2, , ,  – k-th rule; Elements of logical conclusion: – the root of the tree  – the risk of production and economic activity of the oil and gas production enterprises in the conditions of the uncertainty of business environment (R); – terminal vertices – individual risk factors (х1, х2,.., х29); – non-terminal vertices (double circles) – convolutions of risk factors; – edges of a graph, originating from non-terminal vertices – initial variables of the rule database (y1, y2, y3, y4, y5, y6); – convolutions f f f f f f fY Y Y Y Y Y R1 2 3 4 5 6, , , , , ,� � � � � �� are made by logical conclusion based on fuzzy knowledge bases of Mamdani type.	cache/issue-245.pdf	txt/issue-245.txt