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2)Jones,L.A.,Champ，C.W.and Ridge,S.E.(2004).The Run Length Distribution of the CUSUM with Estimatied Parameters.Journal of Quality Technology,36,95-108. 5)Champ,C.W.and Woodall,W.H(1987).Exact Result for Shewhart Control Charts with Supplementary Run Ruels.Technometrics,29,393-399. 7)Quesenberry(1991).