SECH

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AcronymDefinition
SECHHyperbolic Secant
SECHScreened Exchange Plus Coulomb Hole Method
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References in periodicals archive ?
We employed six kinds of reference functions, that is, Symmetric triangle, Gaussian, Cauchy, Laplace, Hyperbolic Secant, and Squared Sinc, and finally produced six 3D FLCs.
Utilizing the concept of reference function, the 3D FLC can access more kinds of 3D MFs, such as Symmetric triangle, Gaussian, Cauchy, Laplace, Hyperbolic Secant, and Squared Sinc.
Classification Mathematical expression Symmetric triangle v(x) = max (1 - d [absolute value of x], 0), d > 0 Gaussian [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] Cauchy v(x) = [1/1 + d[x.sup.2]], d > 0 Laplace v(x) = [e.sup.-d[absolute value of x]], d > 0 Hyperbolic Secant 2 v(x) = [2/[e.sup.dx] + [e.sup.-dx]], d > 0 Squared Sinc v(x) = [[sin.sup.2] (dx)/ [d.sup.2] [x.sup.2]], d > 0 TABLE 2: Performance comparisons.