Page 309 - Electrical Engineering Dictionary

fuzzifier, a fuzzy rule base, a fuzzy inference tative measure of ambiguity to the problems
engine, and a defuzzifier. of gray-tone image enhancement.

fuzzy decision rule a decision rule with fuzzy estimation an action or process
fuzzified antecedents. of deducing state variables from given input
and output measurements in a fuzzy dynamic
fuzzy decision tree a decision tree with state space model.
fuzzy decision functions.
fuzzy expert system a rule-based sys-
fuzzy decision tree algorithm an algo- tem for approximate reasoning in which rules
rithm to generate a fuzzy decision tree, such have fuzzy conditions and their triggering are
as the branch-bound-backtrack algorithm. driven by fuzzy matching with fuzzy facts.
See also fuzzy inference system.
fuzzy decisional algorithm a fuzzy algo-
rithm that serves to provide an approximate fuzzy filter a filter involving fuzzy logic
description of a strategy or decision rule. concepts. A typical example is a filter
constructed from a number of local filters
fuzzy definitional algorithm a finite set through fuzzy membership functions.
of possible fuzzy instructions that define a
fuzzy set in terms of other fuzzy sets (and fuzzy gain scheduling gain scheduling
possibly itself, i.e., recursively). involving fuzzy logic concepts. A typical
example is the use of a number of fuzzy IF-
fuzzy digital topology an extension of the THEN rules to adjust a controller gain.
topological concepts of connectedness and
surroundness in a digital picture using fuzzy fuzzy generational algorithm a fuzzy al-
subsets. gorithm serves to generate rather than define
a fuzzy set. Possible applications of genera-
fuzzy dilation an operator that increases tional algorithms include generation of hand-
the degree of belief in each object of a fuzzy written characters and generation of speech.
set by taking the square root of the member-
ship function. fuzzy geometry a way to describe an im-
age by fuzzy subsets.
fuzzy dynamic model model involving
fuzzy logic concepts and system dynamics. fuzzy global control a fuzzy control for
A typical example is a hierarchical model an overall plant or a control based on a fuzzy
with a higher level of fuzzy inference rules global model that consists of a number of
and a lower level of analytical linear dynamic local models smoothly connected through a
equations. set of membership functions.

fuzzy dynamic system system involving fuzzy global model a fuzzy dynamic
fuzzy logic concepts and system dynamics. model consisting of a number of local linear
A typical example is a fuzzy control system models or simple nonlinear models smoothly
with a dynamic plant and a fuzzy controller. connected through a set of nonlinear mem-
bership functions.
fuzzy entropy the entropy of a fuzzy set
is a functional to measure the degree of fuzzi- fuzzy grammar an attributed grammar
ness of a fuzzy set based on Shannon’s func- that uses fuzzy primitives as the syntactic
tion. It has been applied to provide a quanti- units of a language.

c
2000 by CRC Press LLC