that the current saturates or becomes inde-
pendent of drain bias.
strong localization of light
confine-
ment of light inside a highly inhomogeneous
medium due to very strong scattering.
strong SPR function
See
strictly positive
real function
.
strong strictly positive real function
See
strictly positive real function
.
structural controllability
a dynamically
where for a structured pair of matrices
(A, B)
there exists an admissible pair
(A
−
, B
−
) that
is controllable.
structural pattern recognition
methods
for carrying out the recognition of pattern on
the basis of a structured representation. For
instance, in many interesting problems, the
patterns can effectively be given linguistic
descriptions based on grammars.
structure estimation
determination of the
structure of objects, i.e., the 3-D coordinates
of surface points of objects, from sequences
of images. It is a task sometimes closely re-
lated to motion estimation.
structured cell
an element of a standard
cell library designed using rules from the tar-
geted wafer fabricator. Structured cells are
integral multiples of a unit cell with intercon-
nection points on all four sides of the cell.
Structured cells normally interconnect sim-
ply by being placed next to another structured
cell. Unwanted connections are broken as
opposed to desired connections being made.
structured distribution systems (SDS)
a
topology that advocates cabling saturation of
a desired environment to accommodate all
potential personnel movements and recon-
structions within that office.
structured light
patterns of light pro-
jected onto objects which are to be viewed by
cameras and interpreted by computer. For ex-
ample, a grid of parallel straight lines of light
projected on to a curved object will appear
from a separate viewpoint to be curved and
will provide information on the 3-D shape of
the object.
structured matrix
a matrix whose entries
are either zeros or independent free parame-
ters.
structured noise
noise that is not random
but that is typically periodic, or contains el-
ements of some unwanted signal. This cate-
gory of noise includes clutter, crosstalk, eas-
ily recognized spikes, and so on.
structured uncertainty
low-order pa-
rameter perturbations or unmodeled varia-
tions represented by a family of models with
uncertain parameters ranging within a pre-
specified set. In the case of linear systems
with models in frequency domain, an uncer-
tain system with structured uncertainties is
represented by a family of rational matrices
with given the highest order and a prespeci-
fied set for each uncertain parameter. In the
state space counterpart, an uncertain system
with structured uncertainties is represented
by a family of matrices (in the state equations
of known dimensions depending on uncertain
parameters from the prespecified set).
structuring element
an image or shape
that is used in a morphological operator as
a probe interacting with the image to be an-
alyzed, leading thus to a transformation of
that image. It can be either a set of points
(a colorless shape), or a gray-level image (a
shape with a gray-level profile on it).
In
contrast with the natural image to be pro-
cessed, the structuring element is chosen by
the user and generally has a small support.
See
morphological operator
.
stub
a short section of transmission line,
usually short-circuited or open-circuited at
one end, designed to present a specific im-
c
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