Information Technology Reference
In-Depth Information
IF
there is a moving object in the visual field,
THEN
set up warning timer and send out a warning message.
IF
the warning timer is not zero,
THEN
send out a warning message.
IF
there is no a moving object in the visual field and the
timer is not zero,
THEN cancel the warning timer.
There are two effectors used to build a classifier by using the above rules. The
effectors include SET ALERT,DECREMENT ALERT as well as a detector:
1
if
the
timer
is
not
zero
Ê
Ú
d
9 =
0
other
The classifier can realize the following three kinds of rules, which have the
following forms:
00#############1 / 0100000000000011SET ALERT
00#####1######## / 0100000000000011
00#####1#######0 /DECREMENT ALERT.
A classifier system can be expressed as a network. The most direct method
is to use each node in network to denote related classification. Fig. 13.6 gives
such a network chart. If a moving object appears in the visual field, then ALERT
node is labeled. If the nodes ALERT, SMALL and NOT STRIPED are labeled,
then TARGET node is labeled. In order to make this network become a classifier,
every node is associated with an identification-tag. In Fig 13.6, the five prefix
bits are used as tags.
d1=1
[MOVING]
d5=0
[SMALL]
d6=0
[NOT STRIPED ]
d10=0
[NEAR]
d10=0
[FAR]
01001
[ALERT ]
10001
[TARGET ]
10010
[DANGER]
11011
[FLEE]
11001
[PURSUE ]
11010
[APPROACH ]
11100
[FREEZE]
Fig. 13.6. A network chart
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