Page 271 - Electrical Engineering Dictionary

vector, with m ≤ n (n denotes number of de- extinction cross section the sum of the
grees of freedom). Using minimal represen- scattering and the absorption cross sections.
tation of the orientation matrix, direct kine-
matics equation can be written in the follow- extrapolation one of several methods to

φ estimate the values of a sequence r(k) for
ing form: x = = k(q) where φ is a set
p lags |k| >p from the given values of r(k)
of vectors for minimal representation and p for |k|≤ p.
denotes three position coordinates.
extrinsic associated with the outside or
exterior. In devices and device modeling,
external stability stability concepts re-
extrinsic refers to that part of the device or
lated to the input–output behavior of the sys-
model associated with the passive structures
tem.
that provide interconnects and contacts to
other components, but are still considered a
externally vented machine classification
part of the device.
describing an electrical machine constructed
with an open frame in which ventilation air extrinsic fiber optic sensor a fiber optic
is forced through the machine by blower(s) sensor where the fiber delivers light to and
mounted outside the machine enclosure. from a sensing element external to the fiber.
Chemical sensors are an example where the
extinction angle time in electrical degrees sensing element exhibits a change in opti-
from the instant the current in a valve reaches cal property such as absorption, fluorescence
zero (end of conduction) to the time the valve or phosphorescence upon detection of the
voltage changes sign and becomes positive. species to be measured.

c
2000 by CRC Press LLC