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Table 1

From: Fuzzy support vector machine: an efficient rule-based classification technique for microarrays

 

Reference Function

Fourier Transform

Symmetric Triangle

μ(x) = max(1 - d|x|,0), d > 0

F μ ω = 1 2 π S i n 2 ω 2 d ω 2 d 2

Gaussian

μ ( x ) = e - d x 2 , d > 0 , d > 0

F μ ω = 1 2 d e - ω 4 d 2

Cauchy

μ ( x ) = 1 1 + d x 2 ,d>0

F [ μ ] ( ω ) = π 2 d e - | ω | d

Laplace

μ(x) = e-d|x|, d > 0, d > 0

F [ μ ] ( ω ) = 2 π d d 2 + ω 2

Hyperbolic Secant

μ ( x ) = 2 e dx + e - dx ,d>0

F [ μ ] ( ω ) = 1 d π 2 2 e π ω 2 d + e - π ω 2 d

Squared Sinc

μ ( x ) = S i n 2 ( d x ) d 2 x 2 ,d>0

F [ μ ] ( ω ) =max ( π 2 1 d - | ω | 2 d 2 , 0 )