Table 5.

The updated contact rate estimation table of node j.

The source node	Target node	Contact rate	Update time
N1	N3	λ2	9
N4	N6	λ8	7
N2	N4	λ9	25
N9	N2	λ10	30
j	N2	λ11	46
J	N11	λ12	60
N1	N2	λ1	5
N2	N4	λ4	13
N4	N7	λ5	30
N7	N9	λ6	54
i	j	λij	70