Outmoded test -guru test environment 's low separability between these issues causes a low capacity in the reuse of testing resources and the reassembly of a new test system.

We test the separability of the density matrix by researching the simple combinatorial condition (the "degree condition"), the condition is directly related to the PPT-criterion.

Firstly to select the bands that have class separability by K2 algorithm, then remove the redundant bands based on conditional mutual information test.