Artificial Intelligence and Soft Computing: Behavioral ... - Arteimi.info

j ↓
i→
round oval-shaped
and MBD = high-CP 0.3 0.7
low-CP 0.4 0.6
Suppose, we are interested to compute:
Bel ( BT ≤ 98° F )
and Bel ( BT ≥100° F ).
= P (D /B)
Now, with reference to Pearl’s nomenclature, we thus assume the following
items in fig. 9.8:
ΠBT (high-GM) = 0.6
ΠBT (low-GM) = 0.1
ΠBT (high-CP) = 0.25 and
ΠBT (low-CP) = 0.05
Here, λY (body-temp) =1.0 and
λZ (body-temp) = 1.0
Since body-temp (C) is a terminal node in fig, 9.8. the λ values incoming to
it should be unity. Thus by expression (9.19), we find
Unnormalized Bel ( BT ≤ 98° F)
= ΠBT (high-GM) x ΠBT (high-CP) x P (BT ≤ 98° F/ high-GM, high-CP)
+ ΠBT (high-GM) x ΠBT (low-CP) x P (BT ≤98° F / high-GM, low-CP)
+ ΠBT (low-GM) x ΠBT (high-CP) x P (BT ≤ 98° F / low-GM, high-CP)
+ΠBT (low-GM) x ΠBT (low-CP) x P (BT ≤ 98° F / low-GM, low-CP)