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(fuzzy sets) (fuzzy logic), . 1965 . - . , , , .
A X A={ / MF(x) },
MF(x) - A. x A.
, =" " (. ). " " X = [15; 30] :
A = {20/0,2; 21/0,35; 22/0,4; 23/0,5; 24/0,7; 25/0,8; 26/0,9; 27/0,95; 28/1,0; 29/1,0; 30/1,0}.
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a, b, c:
b-a=c-b .
a, b, c, d:
b=c.
: MF(x)=[,,], MF(x)= [a,b,c,d]. a,b,c,d .
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" ". X = [18; 60] 1,2,3 - "", "", " ".
:
"" = [18, 18, 28, 34],
"" = [28, 35, 45, 50],
" " = [42, 53, 60, 60].
30 :
MF[](30)=0,67;
MF[](30)=0,29;
MF[ ](30)=0.
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Yamaichi Securuties. , 30 . , 1990 , 600 - . , (1987-1989 ). . , ( 1988 ) , . . - , Nikkei 1992 . . () . CubiCalc.
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x=w1x1+ w2x2+ w3x3
f(x).
4.
:
y=f(x)=f(w1x1+ w2x2+ w3x3).
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() xk , y .
(, ) - , . , f (x) , w i .
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() X . wi.
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X5 =
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