, pi2 , . . . , pin , with time stamps Ti1 , Ti2 , . . . , Tin core-micro-cluster w = n j=1 f(t − Tij ) where f(t) = 2−λt and w ≥ µ c = n j=1 f(t − Tij )pij /w r = n j=1 f(t − Tij )dist(pij , c)/w where r ≤ potential core-micro-cluster w = n j=1 f(t − Tij ) where f(t) = 2−λt and w ≥ βµ CF1 = n j=1 f(t − Tij )pij CF2 = n j=1 f(t − Tij )p2 ij where r ≤ outlier micro-cluster: w < βµ