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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.
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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
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 Fuzzy Number • α-cut • Addition:
Operations of Fuzzy Number • α-cut • Subtraction: • Multiplication: • Division: • Minimum: • Maximum:
Operations of Fuzzy Number • α-cut • α = 0.5 • α = 1.0
Operations of Fuzzy Number • Extension principle • Addition: • Subtraction: • Multiplication: • Division: • Minimum: • Maximum: