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t –norm 是模糊理論中常見的數學式子表示法,必遵守 下列4種定律 t:[0,1] ×[0,1] → [0,1] for each a,b,c ∈ [0,1]; t(a,b) = t(b,a) (commutativity) t(a,t(b,c)) = t(t(a,b),c) (associativity)

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Presentation on theme: "t –norm 是模糊理論中常見的數學式子表示法,必遵守 下列4種定律 t:[0,1] ×[0,1] → [0,1] for each a,b,c ∈ [0,1]; t(a,b) = t(b,a) (commutativity) t(a,t(b,c)) = t(t(a,b),c) (associativity)"— Presentation transcript:

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2 t –norm 是模糊理論中常見的數學式子表示法,必遵守 下列4種定律 t:[0,1] ×[0,1] → [0,1] for each a,b,c ∈ [0,1]; t(a,b) = t(b,a) (commutativity) t(a,t(b,c)) = t(t(a,b),c) (associativity) t(a,b) ≤t(a,c),if b ≤c (monotonicity) t(a,0) = 0 and t(a,1) = a, for any a ∈ [0,1] (boundary conditions)

3 X。A=B max{t(x1,a11),t(x2,a21),…,t(xm,am1)}=b1, max{t(x1,a12),t(x2,a22),…,t(xm,am2)}=b2,. max{t(x1,a1n),t(x2,a2n),…,t(xm,amn)}=bn

4 A∨B=A,B中取其大者 A∧B=A,B中取其小者 a 。 b =∨ (ai ∧ bi) (i = 1~n ) a ⊙ b =∧ (ai ∨ bi) (i = 1~n )

5 a 。 b =(0.1 ∧ 0.3) ∨ (0.5 ∧ 0) ∨ (0 ∧ 0.8) ∨ (0.6 ∧ 0.2) =0.2; a ⊙ b =(0.1 ∨ 0.3) ∧ (0.5 ∨ 0) ∧ (0 ∨ 0.8) ∧ (0.6 ∨ 0.2)=0.3;

6 假設某人屬於高個子的程度為 0.9 ,而屬於胖子的程度為 0.4 ,那麼他屬於高個子或胖子的程度為 0.9 ∨ 0.4=0.9; 他屬於高個子且胖子的程度為 0.9 ∧ 0.4=0.4 。

7 任何模糊集合的問題都可透過解模糊來轉化為普通集 合論解決,而普通集合論則可透過模糊化來轉化為模 糊集合。而在任何實際應用中都免不了要經過這2種 步驟。

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