sigmoid

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Related to sigmoidal: S curve, sigmoidal kinetics, Sigmoid curve

sigmoid

[′sig‚mȯid]
(biology)
S-shaped.
References in periodicals archive ?
With the absorbance values obtained from 18 replicates of each concentration, a sigmoidal dose-response curve for each ZpE or LnE batch was constructed and analyzed with the MixLow method, which gave the estimated parameters [[psi].
max] models; and NFAT1 translocation to the nucleus is linked to IL-2 and CD25 expression following allosteric sigmoidal models.
No Mechanisms Symbol Sigmoidal curves 1 N and G (n = 1) [A.
In several families a slight monosymmetry is present in the form of sigmoidal curvature of the floral tube and/or pollination organs; this is true for a number of Agapanthaceae (Kubitzki, 1998a), Agavaceae (Verhoek, 1998), Amaryllidaceae (Vochting, 1886; Church, 1908; Correll & Correll, 1982; Meerow & Snijman, 1998; Meerow, 2010), Anthericaceae (Conran, 1998), Asphodelaceaae (Vochting, 1886; Correll & Correll, 1982; Smith & Van Wyk, 1998), Blandfordiaceae (Clifford & Conran, 1998), Convallariaceae (Conran & Tamura, 1998), Doryanthaceae (Clifford, 1998), Hemeroeallidaceae (Vochting, 1886; Clifford et al.
i] is the response value for concentration i, RO is the baseline activity (lower asymptote of the sigmoidal curve for activators, upper asymptote of the sigmoidal curve for inhibitors), RMAX is the maximal activity (upper asymptote for activators, lower asymptote for inhibitors), and |RMAX--RO| defines the maximal response compared to baseline activity for activators and inhibitors.
Approximations by superpositions of a sigmoidal function, Mathematics of Control, Signals, and Systems 2: 303-314.
A sigmoidal curve was also used in this case to estimate missing data for I-joists and LVL between 1980 and 1996, as well as 2007 to 2010.
The functional response curves may represent an increasing linear relationship (Type I), a decelerating curve (Type II), or a sigmoidal relationship (Type III) (8).
To improve training speed and efficiency, bipolar sigmoidal activation function with adaptive gain parameter is used.
A Equacao 4 de JMAK possui a forma sigmoidal e e mais frequentemente utilizada na forma linearizada, dada pela Equacao 5:
Sigmoid colon: Pericolic, inferior mesenteric, superior rectal (hemorrhoidal), sigmoidal, sigmoid mesenteric