Sinusoid


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Related to Sinusoid: sinusitis, sine wave

sinusoid

[′sī·nə‚sȯid]
(anatomy)
Any of the relatively large spaces comprising part of the venous circulation in certain organs, such as the liver.
(mathematics)

Sinusoid

 

(or sine curve), the graph of the function y = sin x. It is a plane curve (see Figure 1) representing the variation in the sine as the argument, or angle, changes. A sinusoid intersects the x-axis at the points 180°k (or πk) and has maxima at the points 90° + 360°k (or π/2 + 2-πk) and minima at the points - 90° + 360°k (or - π/2 + 2πk), where k = 0, ± 1.....

Figure 1

The curve defined by the equation y = A sin (ωx + Φ0) is also sometimes called a sinusoid. The relation between this curve and the curve y = sin x is as follows: first, the x-coordinates of the points of y = sin x are increased by a factor of ω; second, the y-coordinates of the points of y = sin x are increased by a factor of A; and third, the curve is translated by an amount - Φ0/ω along the x-axis. The number A is called the amplitude, ω is called the angular frequency, and Φ/0 is called the initial phase angle. The sinusoid is of great importance in the theory of oscillations. [23–1296–]

References in periodicals archive ?
As A2 increases, the mean of the sinusoid becomes negative.
In: Cells of the Hepatic Sinusoid, Vol 7 (Wiss E, Knook DL, de Zanger R, Fraaser R, eds).
Mark Vitnell, Director of Sinusoid Pty Ltd says "These new RPE encoders are quality products, made in Australia at a competitive price".
The liver showing marked haemolysis of RBCs within centeral vein & hepatic sinusoid as shown in (photo, 11)
A sinusoid fitted to the ambient data measured near Victoria Station (VIC) for the same period is also plotted for comparison.
During systole, the sinusoid function, with amplitude equal to ventricle stiffness, is multiplied by the activation function make cardiac stiffness function noting that the frequency is 7.
Mononuclear cells within the sinusoid areas in an "Indian Bead" pattern have also been described with EBV infections.
The "learning algorithm" uses nonlinear mathematical transfer functions ranging from gaussian, sinusoid, and sigmoid to hybrids of these and sometimes combines these functions with preprocessing statistical or pre- and postprocessing genetic algorithms to create optimally performing NNs (28-30).
A phase measurement signifies a lead or lag in relation to the input sinusoid.
2], are then drawn to connect maximum and minimum points of the sinusoid waveforms.
The Integrity platform's rapid adoption in the United States is the result of a proprietary engineering advance called continuous sinusoid technology (CST).
C: Granularity in hepatocyte (1), D: Degeneration of hepatocyte (2) and moderate infiltration of inflammatory cells around portal triad(3), E:vein is widely dilated(4), and kupfer cells are in sinusoid(5), eosinophilic cytoplasm and inflammation (6), F: hydropic degenerating (7) and Inflammation cells (8), G:agrigation lymphocytes in the sinusoid (9), H: hepatocytes are more and less normal(10) and glandular around portal triad (11)