“A Unifying Framework for Detecting Outliers and Change Points from Time Series,” IEEE transactions on Knowledge and Data Engineering, pp.482-492, 2006.
, , | 1 1 µ k t k t t A A x x P L ( )( )T 1 1 1 1 ∑ ∑ + = − + = − − − = − = t k i j i i j t k i i x x k t C x k t µ µ µ ⇒ ⇒ ⇒ ▪ ∑ ∑ = − = = Σ + = k i i j i j k i i i C A C C A C 1 1 0 k ( ) k j j , , 1 : L = AR ② ② ② ②
)T 1 : 1 : µ µ µ µ − − + − = + − = − j t t j j t x x r C r C rx r ( ) ( ) ( )( )T 1 ˆ ˆ 1 : : ˆ t t t t k i k t i t x x x x r r x A x − − + Σ − = Σ + − = ∑ = − µ µ ② ② ② ② j A r ∑ = − = k i i j i j C A C 1 ( ) ( ) Σ − = − = − ∑ , , , , , | log 1 1 1 1 µ k i i t i i t A A x x P r I L