unit vector


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unit vector

[′yü·nət ′vek·tər]
(mathematics)
A vector whose length is one unit.
References in periodicals archive ?
The other base pairs are represented as the sum of two unit vectors for each base, as given by the WS-curve method.
The orientation of the optical axis of the camera is determined by the unit vector [[??].sub.i] = [[d.sub.ix], [d.sub.iy], [d.sub.iz]].
The realization of SEHAPF connected through FSMPWM has been examined and the results are compared with the classical HCC using unit vector theory.
The origin of the coordinate system is the center of the Earth, while the unit vector [??] intersects the Greenwich reference meridian at all times, and [??] is aligned with the planet axis of rotation and is positive northward.
as it follows from formula (17), it is straightforward to obtain also the azimuthal angle [theta] in the spherical representation of the invariant unit vector n and the angle of rotation [phi], respectively, as
Let [[theta].sub.n] denote an arbitrary unit vector orthogonal to the subspace < [e.sub.-1], [e.sub.0], ..., [e.sub.n-1] > (which also contains vector [r.sub.n-1]), and [E.sub.n] denote the set of vectors {[e.sub.-1], [e.sub.0], -[e.sub.1], -[e.sub.2], ..., -[e.sub.n-1]}.
As a unit vector [[??].sub.c] is turned by 90 degrees every time differentiated with respect to time, [[??].sub.c] * [[??].sub.c] = 1, [[??].sub.c] * [[??].sub.c] = 0 , [[??].sub.c] * [[??].sub.c] = -[[OMEGA].sup.2])
The normal unit vector N is equal to d[h.sup.#] = q, and thus
where [??] and [??] are the unit vectors of the rotational velocity vector w and the translational velocity vector [??], respectively, and [C.sub.m] is the Magnus coefficient that depends on the spin factor S.
The expansion of the 3-dimensional vector x = [[[x.sub.a] [x.sub.b] [x.sub.c]].sup.*] [member of] [X.sup.(3)] along the ZS unit vector determines the representation of the 3-dimensional vector by two mutually orthogonal components
If N is the unit vector normal to the associated wave phase, the electron subject to the frequency [v.sub.0] = [m.sub.0][c.sup.2]/h has traveled a distance dN during a time interval dt, so that we may define an electronic phase [[phi].sub.e] which has changed by: