RMSD ( A , B ) = ∑ i = 1  N  ( ( A u i    − B u i    )  2  + ( A d i    − B d i    )  2  )    2 N     ,   MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=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@5B92@