Whole situation and Partial situations
Whole situation J=(D, N) : Contains N features and D events.
Feature selection vector: d = (d１, d２,…,dD)
Event selection vector : n = (n1, n2,…,nN)
Vector element di,ni are binary indicator of
Number of selected features: d
Number of selected events : n
Selecting all features: D
Situation decomposition extracts some matchable situations from whole situation J=(D, N) which potentially contains 2D+N partial situation.