Chapter 5 FUZZY NUMBER Chi-Yuan Yeh.

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Presentation transcript:

Chapter 5 FUZZY NUMBER Chi-Yuan Yeh

Outline Interval and Fuzzy number Operations of interval Operations of fuzzy number α-cut extension principle Triangular fuzzy number Trapezoidal fuzzy number

Interval

α-cut

α-cut

α-cut

Fuzzy number Definition: a fuzzy set A on R must posses at least the following three properties A must be a normal fuzzy set must be a closed interval for every (convex) the support of fuzzy set A, , must be bounded

Operations of Interval

Operations of Interval

Operations of Interval

Operations of Interval

Operations of Interval

Operations of Fuzzy Number α-cut Addition:

Operations of Fuzzy Number α-cut Subtraction: Multiplication: Division: Minimum: Maximum:

Operations of Fuzzy Number

Operations of Fuzzy Number α-cut α = 0.5 α = 1.0

Operations of Fuzzy Number Extension principle Addition: Subtraction: Multiplication: Division: Minimum: Maximum:

Operations of Fuzzy Number

Operations of Fuzzy Number

Operations of Fuzzy Number

Operations of Fuzzy Number

Operations of Fuzzy Number

Operations of Fuzzy Number

Operations of Fuzzy Number

Operations of Fuzzy Number

Triangular fuzzy number

Triangular fuzzy number

Triangular fuzzy number

Triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Operations of triangular fuzzy number

Approximation of Triangular Fuzzy Number

Approximation of Triangular Fuzzy Number

Approximation of Triangular Fuzzy Number

Operations of triangular fuzzy number

Operations of triangular fuzzy number 4

Approximation of Triangular Fuzzy Number 4

Approximation of Triangular Fuzzy Number

Trapezoidal fuzzy number

Operations of Trapezoidal Fuzzy Number

Operations of Trapezoidal Fuzzy Number

Operations of Trapezoidal Fuzzy Number

Approximation of Trapezoidal Fuzzy Number

Operations of Trapezoidal Fuzzy Number

Exercise Is B a convex fuzzy set? Is B a fuzzy number?

Exercise

Thanks for your attention!