# unit normal

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## unit normal

[′yü·nət ′nȯr·məl]
(mathematics)
A unit vector in the direction of the principal normal to a surface or space curve.
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References in periodicals archive ?
Following that control, the next step was the construction of unit normal variance matrix (Z).
i] (i = 1, 2, 3) are the length, unit tangent vector and unit normal vector of [partial derivative][S.
In , a new anisotropic impedance boundary condition was introduced which was called mixed-impedance (MI) boundary condition, in which a TE/TM decomposition of the field with respect to the unit normal vector to the boundary surface was assumed and the boundary had two different surface impedances for TE and TM polarized fields.
w] is the unit normal vector directed into the wall, and [[[vector].
If the unit normal vector field of a surface S is in the same time the unit normal vector field of another surface S, then the two surfaces S and [?
Let S be the boundary surface of R and n be the outward pointing unit normal vector at each point of S.
4],(m)), be the unit normal vector field on M as a submanifold of [S.
Here [gamma] is the included angle between the positive direction of Oz axis and the unit normal vector of plane S.
It is described by the matrix equation: Ax - b [less than or equal to] 0, where A is a matrix whose rows define the unit normal vectors to the faces of the convex hull.
Mathematical Expression Omitted] = unit normal vector pointing outside the gate path
Since L is large, SCPE is distributed unit normal (Dodd and Warner 1980).

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